predicting kinase inhibition/adverse event …literature[17]. textpresso and other text mining...
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J Biomed Inform. 2010 Jun;43(3):376-84. Epub 2010 May 1.
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Predicting Kinase Inhibition/Adverse Event Relationships with in vitro
Kinome and Clinical Trial Data to Advance Clinical Development
of New Therapeutics
Xinan Yang, PhD
1,2, Yong Huang, MD, MSc
1,2, Matthew Crowson
1,2, Jianrong Li, MSc
1,2,
Michael L. Maitland, MD, PhD3,4,5,*
, Yves A. Lussier, MD1,2,4,5,6,7,*
1Center for Biomedical Informatics,
2Sections of Genetic Medicine and
3Hematology/Oncology,
Department of Medicine, 4 UC Comprehensive Cancer Center,
5Committee on Clinical Pharmacology and
Pharmacogenomics, 6Institute for Genomics and Systems Biology,
7Computation Institute,
The University of Chicago, Chicago, IL; *Corresponding Authors
* Corresponding authors:
Yves A. Lussier, M.D.
Address: 5841 S. Maryland Avenue, MC 6092, Chicago, IL 60637-1470, USA
Tel.: (+1)773-834-0743; Fax: (+1)773-702-2567
E-mail address: [email protected]
Michael L Maitland, M.D.
Address: 5841 S. Maryland Avenue, MC 2115, Chicago, IL 60637-1470, USA
Tel.: (+1)773-702-6149; Fax: (+1)773-834-0188
E-mail address: [email protected]
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Abstract
Background
Kinase inhibition is an increasingly popular strategy for pharmacotherapy of human diseases. Although
many of these agents have been described as “targeted therapy”, they will typically inhibit multiple
kinases with varying potency. Pre-clinical model testing has not predicted the numerous significant
toxicities identified during clinical development. The purpose of this study was to develop a
bioinformatics-based method to predict specific adverse events (AEs) in humans associated with the
inhibition of particular kinase targets (KTs).
Methods
The AE frequencies of protein kinase inhibitors (PKIs) were curated from three sources (PubMed,
Thompson Physician Desk Reference and PharmGKB), and affinities of 38 PKIs for 317 kinases,
representing > 50% of the predicted human kinome, were collected from published in vitro assay results.
A novel quantitative computational method was developed to predict associations between KTs and AEs
that included a whole panel of 71 AEs and 20 PKIs targeting 266 distinct kinases with Kd < 10uM. The
method calculated an unbiased, kinome-wide association score via linear algebra on (i) the normalized
frequencies of AEs associated with 20 PKIs and (ii) the negative log-transformed dissociation constant of
kinases targeted by these PKIs. Finally, a reference standard was calculated by applying Fisher’s exact
test to the co-occurrence of indexed Pubmed terms (p≤0.05, and manually verified) for AE and associated
kinase targets (AE-KT) pairs from standard literature search techniques. We also evaluated the
enrichment of predictions between the quantitative method and the literature search by Fisher’s Exact
testing.
Results
We identified significant associations among already empirically well established pairs of AEs (e.g.
diarrhea and rash) and KTs (e.g. EGFR). The following less well recognized AE-KT pairs had similar
association scores: diarrhea-(DDR1;ERBB4), rash-ERBB4, and fatigue-(CSF1R;KIT). With no filtering,
the association score identified 41 prioritized associations involving 7 AEs and 19 KTs. Among them, 8
associations were reported in the literature review. There were only 78 out of a total of 4,522 AE-KT
pairs meeting the evaluation threshold, indicating a strong association between the predicted and the text
mined AE-KT pairs (p= 3x10-7
). As many of these drugs remain in development, a larger volume of more
detailed data on AE-PKI associations is accessible only through non-public databases. These prediction
models will be refined with these data and validated through dedicated prospective human studies.
Conclusion and future directions
Our in silico method can predict associations between kinase targets and AE frequencies in human
patients. Refining this method should lead to improved clinical development of protein kinase inhibitors,
a large new class of therapeutics.
Keywords:
Adverse event; toxicity; kinome; kinase inhibitor; computational modeling; translational bioinformatics
Abbreviation:
PKI: Protein Kinase Inhibitor
KT: Kinase Target
AE: adverse event
Kd: dissociation constant
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1. INTRODUCTION Motivation: Protein kinase inhibitors (PKIs) are a new class of drugs. Directly or indirectly, kinases
regulate nearly every process of cells and tissues. Scientists first described the structure and function of
protein kinases through their studies of the molecular basis of cancer. Many of the first discovered
“oncogenes” proved to be mutant forms of the genes encoding protein kinases that resulted in
autonomous or dysregulated kinase activity. Based on these concepts, PKIs were initially developed to
treat cancer, and the first such drug to be approved for marketing by the U.S. Food and Drug
Administration was imatinib (Gleevec™) for treatment of chronic myelogenous leukemia (CML).
Touted as “targeted therapy”, imatinib revolutionized treatment and prognosis for this disease[1]. But
characteristic of PKIs, imatinib not only inhibits the Bcr-Abl oncogene specific to CML, but also other
kinase targets (KTs) such as c-Kit, and platelet derived growth factor receptor alpha (PDGFRA). As
imatinib was used in increasing numbers of patients, unexpected adverse events (AEs) such as
hypophosphatemia[2] and cardiac dysfunction[3] were identified. This pattern of inhibition of both
intended and unintended KTs with clear therapeutic benefit limited by unexpected AEs has been
reproduced with every PKI approved for widespread use. Many similar agents have failed or been stalled
during clinical development because of insufficient benefit and unexpected toxicities. Better
understanding of the physiologic consequences of inhibiting specific KTs should lead to development of
safer cancer therapeutics, more effective combination treatments, and support the cross-purposing of these
drugs from cancer care for use in other diseases[4]. Specifically, confirming the absence of an adverse
event is challenging in conventional pre-clinical trials because these trials may not be conducted in animal
species exhibiting the AE. For example, rodents may be used to defined efficacy; however, this specie is
highly resistant to nausea and exotic animal species are required to determine AEs that could occur in
human. Consequently, the development of a high throughput computational method over in vitro assays
may offer the opportunity to specific the requirements of specific pre-clinical assays to rule out putative
AE identified in silico, accelerating the drug development process and reducing costs by avoiding
discovery of unexpected AEs of a compound in clinical trials.
Biological Background: Protein kinases constitute much of the signaling pathways and interactive
cellular signaling networks. More than 500 protein kinases are encoded in the human genome. The
collection of these evolutionarily conserved, modularly structured enzymes is referred to as the
kinome[5]. Given the evolutionary history of these proteins reflected in shared sequences, structures, and
functions, it is not surprising that drugs screened for capacity to inhibit specific kinases inevitably seem
also to inhibit some other kinases unintentionally. Specificity has typically been assessed in in vitro
cellular assays. These assays are typically not standardized among laboratories and cross-reacting kinases
might not be relevant to cellular function or even be expressed at all in the particular tested cells.
Furthermore, the non-conserved sequences of kinase genes contribute to the expression and functional
differences in cellular signaling that produce the metabolic and physiologic differences among species, so
animal toxicity findings do not consistently predict effects in humans. Consequently, the introduction of
PKIs to human subjects has led to novel observations not only for clinical therapeutics but for better
understanding human molecular physiology[4].
Although many methods have been developed[6, 7] to predict chemical structure/kinase inhibition
relationships, there has been no dedicated effort to associate inhibition of specific kinases with
physiologic consequences through systems analysis approaches. Two major obstacles have been
observed 1) the limited, labor-intensive assessment of PKI specificity through cellular assays without
central laboratory standardization, and 2) limited concurrent comparisons of PKIs in clinical use or
development on the same platform. Recently, Zarrinkar and colleagues presented the largest comparative
analysis of PKI selectivity (including 38 PKIs) with an unbiased in vitro kinome-wide binding assay[8].
Although with acknowledged limitations, their data provide the opportunity to cross-compare effects of
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many PKIs in clinical use and development. The structured reporting of AEs in the clinical trials that have
tested these agents provides a database with which to infer AE-KT relationships.
Table 1. The comparison with related studies
AE-
Drug
Drug Target Prediction Protein target-
Toxicity
PKI-Specific Input
Data Size
Lit
era
ture
Ph
ys
ical
Kin
om
e
Lit
era
ture
Ch
em
ical
Str
uc
ture
Co
mp
t .
Pre
dic
tio
n
Ev
alu
ati
0o
n
Kin
om
e-w
ide
An
aly
sis
Lit
era
ture
Co
mp
t. P
red
icti
on
Ev
alu
ati
on
Ad
ve
rse
Eve
nts
(#
)
Kin
as
e In
hib
ito
rs (
#)
Kin
as
e t
arg
ets
(#
)
Studies Focusing on kinanes Toxicities
Present study ■ ■ ■ ■ C,M 71 20 266
General Studies predicting target Toxicities (not focused on kinases)
Hansen 2009[9] ■ ■ B ■ 3 1* -
Bender A, et al. 2007[10] ■ ■ ■ ■ 166 - 0*
DART 2003[11] ■ ■ ■ 187 - -
Apic 2005 [12] ■ ■ - - -
Studies predicting drug targets, but not their Toxicities
Not Applicable
Fliri 2007 [13] ■ ■ C,B 5,923 2* 168*
Garten 2009 [14] ■ 395*a 21*
b 121*
c
Liebovitch 2007 [15] ■ - - -
Campillos M, et al. 2008[16] ■ ■ ■ B 727 3* -
LEGEND: C=computational evaluation, B=biological validation, M= manual curation, #: count,
*: subset of gene targets with protein kinase activity (GO:0004672) or subset of drugs that are kinase inhibitors;
- : no specific detail about the input data
a: by searching the key words “side effect” in the Pharmspresso on line database
(http://pharmspresso.stanford.edu/ygarten/Pharmspresso/html/index.html)
b: by searching the key words “human”, “kinase” and “Inhibitor” in the Pharmspresso on line database
c: by searching the key words “human” and “kinase” in the Pharmspresso on line database
Bioinformatics Background: Although there exist many computational approaches to predict individual
drug targets, few studies pertain to many targets. We summarized in Table 1 those studies that access
multiple-target predictions (high throughput). Some excellent studies focused on computationally
predicting the target of drugs (bottom part of the table), while others focused on their toxicities (middle
part). On the first row, the present study, focuses on kinases, uses the physical kinome map and provides
an evaluation of adverse event relationships, elements that contrast with the majority of other studies.
Our methodological approach also differs from that of these other publications. First, we used text
mining technology to evaluate our computationally predicted results. A few others undertaking such
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large-scale approaches have incorporated text-mining and natural language processors to unlock relevant
data from disparate and heterogeneous sources. For example, Kuhn et al. have created a search tool for
interactions of chemicals and proteins, coined “STITCH”, that consolidates chemicals and draws
relationships between the chemicals and their activity data in cell lines, MeSH assignments, and
literature[17]. Textpresso and other text mining approaches were used to curate the relationships between
drugs and genes[11, 14]. However, simple text-mining would not provide enough statistical power for a
group of new drugs under active clinical development, since there is insufficient openly accessible
literature. For example, searching Pharmspresso by “EGFR side effect” results in no match[14]. Second,
we are the first to perform prediction analyses based on kinome-wide physical mapping. Prior studies of
adverse effects have mostly generated or used molecular pathway atlases to assess structure-function
correlations in complex systems. For example, by understanding the physiological pathways and
potential binding partners of a candidate drug, it is theoretically possible to anticipate adverse events of
the candidate if the consequences of binding to these non-target partners are known. One commercial
provider, Cambridge Cell Networks (CCNet) has created the “PathTox” tool that offers a sequence search
in their pathway atlas that reports the probable secondary effects of candidates binding to specific
partners[12]. Further, a research group at Pfizer has been able to forecast the effects of drugs on a large
scale using computational techniques to establish relationships between structure and function to predict
the probability of two drugs exhibiting similar system-wide effects[13]. A recent study based on
integration of data on gene-drug interactions, gene-interaction and drug-drug similarity predicted novel
candidate genes that might affect interindividual differences in metabolism, effectiveness, or adverse
events for four drugs including one PKI gefitinib[9]. Third, though the feasibility of using adverse
events to reveal the molecular and genetic interactions with drugs in humans has already been established,
we are the first to develop computational methods focused on the complex, often overlapping
binding/inhibition profiles of PKIs specifically. A relevant recent study uncovered 12 drug-target
relationships by means of predicting relationships using phenotypic adverse event similarities; they
further validated all of these relationships and successfully confirmed 9 of the relationships using in vitro
binding assays[16]. This study is the first to predict computationally binding of drugs to unintended target
molecules based on correlations between target binding and adverse event similarity. Others predicted
combination of drugs with desired effects based on chemical structures of drugs[15]. A pilot study
predicted toxicity related targets by combining drug off-targets binding and adverse reactions using
Bayesian methods[10], however, their resulting 70 targets contain no kinase targets.
Rationale: To predict computationally the toxicities resulting from inhibition of specific KTs we
developed a novel quantitative method which was designed to be comprehensive and unbiased, including
all available information on AEs and PKIs. It provided a proof-of-concept that AE-KT relationships can
be predicted by analyzing the specific AEs induced by multiple inhibitors and the propensity of these
inhibitors to bind specific KTs on a physical kinome map. We then evaluated the prediction method by
comparing the results to evidence from literature mining.
Contribution: To our knowledge, we have performed the first computational prediction of toxicity of
kinase inhibition using kinome-wide physical mapping. Our work contributed a table of PKIs with
reported adverse events and their prevalence.
2. METHODS In this paper, we aim to offer a proof-of-concept by presenting a significant correlation between
frequencies of adverse events and kinome inhibition patterns through a survey of emerging kinase
inhibitors in 3 modules: 1) Literature mining to generate quantity mapping between PKIs and adverse
events; 2) Computationally predicting the significant association between targets and adverse events using
two different methods; 3) Evaluating the predicted results by independent literature searching of co-
occurrence and significance estimation. Figure 1 introduces the data and their relationship and Figure 2
demonstrates the three modules.
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Figure 1. Illustration of raw data and their relationship in this study. The frequencies of adverse events (AEs)
associated with kinase inhibitors were curated from three sources (Thompson Physician Desk Reference, PharmGKB and PubMed). The dissociation constants (Kd) of kinases were summarized from physico-chemical assays[8]. The
computational method in this study considers all of these data to predict the association between AEs and targets of kinase inhibitors.
2.1 Data Organization 2.1.1 Kinome Map Collection and Procession
The physical kinome map was summarized from novel PKI-KT dissociation constant (Kd) data for 38
kinase inhibitors against a panel of 317 kinases[8]. Three steps were performed before statistic
computation: First, mutated targets were excluded, except for those without assay for their non-mutation
targets which were GCN2, JAK1, JAK2 and JAK3, since the homologous gene targets (mutated kinase)
are repeated measures of the related targets comparing to those of more independent genes. Second, 20
PKIs having no curated AEs were excluded. Finally, we took a negative log-transformation of all Kd
values, because logarithm transformation reduces detection noise to an additive level and tends to convert
exponential distribution trends to normal distribution trends (Suppl. Figure 1).
Figure 2 The study consists of three modules: Data organization, computational prediction and computational evaluation. In the module of Data organization, two steps generated two different associations used
as the inputs to the “prediction of kinase toxicity” module. In step , a dissociation constant is found in a physical kinome map, while in step , drug adverse events were curated from multiple sources. In the modules of prediction of
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kinase toxicity ( step ), a quantitative method was developed to identify the prioritized AE-KT association scores (PAS). In the evaluation ( step ), Pubmed was mined to identify enriched AE-KT pairs from a total of 4,522 putative pairs among 17 AEs that have more than five PKI repeats and 266 observed kinases. Then the findings of the predictive method were evaluated against the text mining results.
2.1.2 Curation for Relationship between PKIs and Adverse Events from various Knowledge
Sources (Suppl. Table 1)
Adverse Events Source Selection: To locate the adverse events data for the collection of the 38 kinase
inhibitors[8] with kinase binding information, we reviewed a clinical pharmaceutical resource - Thomson
Physician’s Desk Reference (PDR), a biomedical informatics resource - PharmGKB, as well as Medline-
indexed primary research articles via PubMed. Given the heterogeneity of the PKI data reported in our
sources, data found in PDR and PharmGKB was given priority over any journal-derived clinical data.
When we failed to find an agent in either PDR or PharmGKB, the most recent journal articles with the
most explicitly quantified adverse event data were used. To cross-check the validity of the collected
adverse event frequency values in PDR and PharmGKB, we also compared the adverse event frequency
data for PKIs found in the electronic PKI database Facts & Comparisons (Version 4.0) for consistency.
Adverse Event Normalization: We normalized both the frequency values and the symptom/adverse
event terms of the adverse event data extracted from PharmGKB, PDR, and recent literature. We reported
AE frequencies as percentage values. First, to normalize AE frequencies reported in the literature as a
range or as different frequencies from various sources, we took the mean value of the range. And for
frequencies presented in a series of comparative doses (e.g. 10mg vs. 100mg vs. 200mg) we used the AE
frequencies associated with the highest dose. Second, to normalize the AE terms we created logical AE
terms to consolidate related AEs (e.g. “Rash” encompasses “skin Rash”, "vesiculobullous rash",
"acneiform rash", and “maculopapular rash”). For simplification, we hereafter refer to these normalized
AE as AE.
Expected Adverse Event Frequency in Population: In practice, a universal threshold indicating a
frequency above that of placebo for all adverse events was inappropriate. Indeed, certain adverse events
like headache or back pain occur at much higher incidence in the population than that of neutropenia.
Therefore, we reviewed the literature to find out the expected frequency, and then decided a little severer
threshold (generally by 50-100% above expected frequency) for every adverse event. The literature
sources comprise of: 1) wrong diagnosis (http://www.wrongdiagnosis.com/p/pain/prevalence-types.htm);
2) emedicine.com (http://www.emedicine.com/emerg/topic233.htm); 3) population health metrics
(http://www.pophealthmetrics.com); 4) PKIs.com (http://ww.PKIs.com) 5) DailyMed
(http://dailymed.nlm.nih.gov); 6) Merck manual online; 7) google “adverse event” prevalence.
2.2 Computational Prediction on Associations Between Adverse Events and the
Kinome The method was designed to take into account every piece of evidence from the adverse events, kinases
and kinome map. The inputs were two quantitative association matrices: the curated AE-PKI frequency
matrix and the PKI-KT binding affinity matrix, respectively (Figure 2).
We introduce definitions as follows: (dx), x=1,…,p, denotes a set of protein kinase inhibitor s(PKIs); (ty ),
y=1,…,q, denotes a set of kinase targets (KTs); and (ez), z=1,. . .,r, is a set of adverse events (AEs).
Definition 1. The AE-KT association matrix A=(azy) consists of an association score that reflects the
association between the kinase target ty and the adverse event ez which is a (r × q) dimension matrix.
Definition 2. The AE-PKI association matrix F=(fzx ), a (r × p) dimension matrix, consists of the
frequency of normalized adverse event ez for a PKI dx which were curated from three sources (PubMed,
Thompson Physician Desk Reference and PharmGKB).
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Definition 3. The PKI-KT relationship matrix K=(kxy) , which is a (p × q) dimension matrix, consists of
an experimental dissociation constant value (Kd value) for a PKI dx targeting ty that was reported in
literature[8].
Prioritized Association Scores (PAS)
The PAS method assumes that the toxicity of a single kinase can be repeatedly observed by multiple PKIs
targeting this kinase with respects to both their combining affinity and their AE frequencies. By an
association operation, the matrix multiplication, we scored the AE-KT associations (Figure 3) as:
p
x xyzx kfKFA1
)log()()log( (1)
where F and K were the normalized frequency of AEs and the dissociation constant of PKIs, respectively.
The higher the score, the more prioritized the association of the kinase with the corresponding adverse
event would be. Following the study of the false discovery rate, a discovery threshold was set as the top
(0.2% quantile) of all observed scores in this study. Moreover, we traced back to identify the PKIs that
associated both to the kinase and the adverse event of finding. These PKIs are much of interests because
they should be avoided of together using due to the higher possibility of inducing the same adverse event.
False discovery rates were computed on each score by permutation resampling of K. Multiple
comparisons which were adjusted using the q-values[18, 19]. R language source of the Prioritized
Association Scores method is available at http://www.lussierlab.org/publication/PAS/ .
Figure 3. The association scores identified prioritized AE-KT pairs were included to generate the output bipartite network. The AE-KT prioritized association scores in matrix A were constructed by applying a matrix multiplication on the AE-PKI frequency matrix F and the PKI-KT binding affinity matrix K. A prioritized AE-KT pair has an association score higher than the top (0.2% quantile) of all observed scores (q-value < 21%).
2.3 Evaluation Text Mining of PubMed: To predict the adverse event of kinase by significant co-occurrence in abstracts
indexed in PubMed, we used Pubmatrix[20], a multiplex literature mining tool. Let N be the totally
records in PubMed, we created a contingency table (Table 2) for each putative pair of AE-KT: n2 is the
number of abstracts containing a kinase t, n3 is the number of abstracts about an adverse event e, and n1
is the number of abstracts of both. Then one-sided Fisher’s exact test was applied to evaluate the
significance of association between each pair of kinase target and adverse event[7, 21]; and a gold
standard of unadjusted p ≤ 0.05 was set as significant for a co-occurrence. We further manually verified
the computationally corroborated pairs and rejected targets whose symbols appearing in abstracts refer to
other objects instead of genes, e.g. CIT is the abbreviation for “city”, YES refers to “yes”, MET refers to
“Methods” or “metabolic equivalents”, Gak as institute name, and TEC is the abbreviation for “toxigenic
Escherichia coli” or “total eosinophil counts” in many abstracts.
Table 2. Contingency table for each AE-KT pair using text mining of Pubmed
#ref. include kinase t #ref. not include kinase t ∑
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#ref. include AE e n1 n3-n1 n3
#ref. not include AE e n2-n1 N-n2-n3+n1 N-n3
∑ n2 N-n2 N
Using a Fisher’s Exact Test, we further evaluated the enrichment (overlap) between the AE-and-KT co-
occurrences in pubmed identified by computational text mining and the AE-KT pairs predicted by the
association score method conducted over the kinome map.
3. RESULTS
3.1 Mapping PKIs and adverse events using literature curation Karaman MA et al. successfully mapped an interaction for 38 PKIs (drugs) across a panel of
317 kinases[8]. Our literature curation resulted in 71 normalized AEs induced by 20 of these 38 PKIs
from 181 literature-reported adverse drug activities (Figure 2). The primary analysis was performed on
the minimal panel of the 266 distinct kinases targeted by 20 PKIs, whereas the 20 PKIs had 71 reported
adverse events. Suppl. Table 1 gives the details of normalized adverse events, their prevalence and the
estimated threshold of frequency. In the table, the adverse event “Asthenia” is merged with “Fatigue”
because of the similarity of these two categories; conversely, the adverse event “Pain” is further
subdivided into “Back Pain”, “Chest Pain” and “Pain” because of their different ratios of incidences. A
smaller panel of inputs for evaluation, the 17 AEs with more than 5 repeats of PKIs that target 266
distinct kinases is described in Suppl. Table 2.
3.2 Computational prediction of significant associations between AEs and kinase
targets (Methods, Formula 1). . We identified 41 prioritized AE-KT associations among 19 targets and 7 adverse events using a
threshold of the top of 0.2% quantile of all 18,866 (71x266) scores (Suppl. Figure 2 and Suppl. Table
3). Eight prioritized associations by PAS were also independently related to significant co-occurrences
identified by text mining: nausea to ERBB2, fatigue to VEGFR2, diarrhea to both KIT and EGFR, rash to
both EGFR and ERBB2, and asthenia to both ERGF and ERBB2 (red lines in Suppl. Figure 2 and green
lines in Suppl. Figure 3). Figure 4 is a bipartite network of the identified associations summarized from
the associations between KTs and AEs after merging the vertices of similar AEs into one vertex, which
are nausea and vomiting, asthenia and fatigue.
Kinase
AE
Line Width : Prediction Score (a)
a > 0.2 (median q < 1%)
0.2 ≥ a > 0.113 (q ≤ 21%)
Line Color: Evaluation in Review of Literature
red Also found in Literature Review
grey Not found in Literature Review
Figure 4. The predicted network of adverse events of kinase targets using association score. Bipartite network
of 41 prioritized AE-KT pairs with the top PAS association scores (a score > 0.2; the best 1/5 of 1% of all calculated
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scores) consisting of 7 distinct AEs and 19 distinct kinase targets. As shown in the plot, a wider line indicates a higher priority of association. In additional, the predicted AE-KT associations by text mining of PubMed (Fisher’s exact test p≤0.05) are resented in red color. In our evaluation using text mining, a Fisher’s Exact test showed a significant (p=3x10
-7) association between the literature review among these 41 predicted AE-KT pairs. Pairs of similar vertices
(Nausea and Vomiting, Asthenia and Fatigue) were each merged into a single vertex, respectively (For more details, see Suppl. Figure 2).
3.3 Evaluation Independently, we searched PubMed using the on line tool Pubmatrix[20] for every putative pair of
kinase targets and adverse events. For simplification, we used a smaller panel of inputs, the 17 AEs with
more than 5 repeats of PKIs that target 266 distinct kinases. This panel evaluates the literature co-
occurrence of 4,522 (266x17) putative AE-KT pairs, which excludes only 3 captured AE-KT pairs from a
total of 5,320 (266x20) putative pairs in PAS. As of Oct 21, 2008, there were a total of 19,028,626 (N)
abstracts indexed in PubMed. Among them, only 105 AE-KT pairs meet the text mining gold standard
(the unadjusted Fisher’s exact p-value ≤ 0.05). After manual verification, 27 pairs involving five targets,
which were CIT, YES, MET, Gak and TEC, were rejected due to their searched symbol representing other
objects instead of gene in the abstracts indexed in PubMed (For details, see Suppl. Table 4). Thereafter,
78 predicted AE-KT pairs were presented in as the predicted network of side effects and kinase targets
using computational text mining of literature indexed in PubMed (Suppl. Figure 3).
Eight out of 41 AE-KT pairs predicted using association score were also predicted by literature review. A
Fisher’s Exact test showed a strongly significant association between the discovery of our quantitatively
computational method and the literature review: p-value=3x10-7
.
4. DISCUSSION Our study recapitulated well recognized associations between AEs and widely used PKIs. The two
strongest relationships captured are diarrhea, a recognized, mechanism-based adverse event of epidermal
growth factor receptor (EGFR) inhibition, and the other common EGFR inhibitor-induced AE, rash. The
rash caused by EGFR kinase inhibitors has been associated with clinical response for multiple cancers,
and this serves as evidence that intended KTs have both salutary and adverse effects where the
relationship was confirmed by the PAS method[22-24]. Examination of these strongest relationships is
useful for assessing our methods development, making modifications for future analyses, and generating
hypotheses that might be easily validated on existing clinical specimens or data.
The cumulative adverse event data in this study are collected from phase I, phase II, phase III, and other
clinical investigations of numerous kinase inhibitors, both those FDA approved and those not yet
completing clinical development; a larger sample than any individual trial. These studies describe the full
spectrum of adverse events both drug-related and disease-related. In any single trial (especially if this trial
is not placebo controlled- the typical case for oncology phase I trials) it is frequently not apparent which
toxicities are reproducibly attributable to the drug, and it is certainly not clear if the adverse events are
due to the mechanism of action of the drug or an “off-target” effect. The comparison of drugs with
overlapping and non-overlapping molecular binding properties provides a rational approach to
determining which adverse events, dose-limiting or not, might be attributed to the inhibition of which
targets. Indeed, many of the so-called targeted kinase inhibitors have been shown to target a wider
spectrum of kinases than originally planned[25].
An unexpected and exciting finding is the identification of the CSF1R/fatigue and KIT/fatigue
associations. As depicted on the kinome dendrogram[26], CSF1R, KIT and VEGFR2 are three kinases
with similar sequence and physical structure but with biological roles important to different cell subsets.
VEGFR2 is almost exclusively expressed on endothelial cells and is activated in tumor angiogenesis.
Therefore this has been the primary target for several new cancer therapeutics such as sunitinib and
AMG-706 (now known as motesanib). CSF1R plays a major role in granulocyte/monocyte/macrophage
development, signaling, and regulation of cytokine release and response. KIT signaling has been reported
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11
to mediate various roles in different tissues, but is most prominently involved in proliferation and
differentiation of various hematopoietic lineages and in mature mast cell and eosinophil signaling. The
agents developed to inhibit the structurally similar VEGFR2 tend to have relatively high potency for
CSF1R and KIT and fatigue is a common, sometimes dose-limiting adverse effect of these drugs.
Although we have identified a strong association between these kinases and fatigue, it remains unclear
whether one, two, or all three of these KTs mediates the fatigue. If any of the three is differentially
associated, there will be the opportunity in either development of new drugs or in administration of
combinations of PKIs to decrease the associated fatigue by either selectively eliminating the offending
KT affinity or by selecting 2 PKIs that when added together will maximize inhibition of the intended
therapeutic KT, while reducing the inhibition of the unintended, fatigue-inducing target. Given the
unbiased identification of this AE-KT association and its strength relative to the panel of relationships
tested, our clinical program has commenced studies of human circulating protein biomarkers for
disruption of CSF1R signaling and validation studies of the relationship between inhibition of CSF1R and
fatigue in cancer patients treated with PKI’s that target VEGFR2.
Mined facts from Pubmed used in the evaluation are specific for each drug and, to our knowledge, only in
very few specific cases have been generalized to a group of drugs. While this is a limitation of the
evaluation, we believe this may be the first high throughput evaluation of PKI toxicities. While the gold
standard of drug target prediction, an older field, is the biological validation in vitro, drug toxicities
predictions require a much more complex design for two reasons: in vitro cellular studies cannot reflect
more than a cellular toxicity (animal models would be required for most clinical toxicities such as rash,
vomiting, etc), and because of interspecies differences in kinase structures and functions animals may
frequently not manifest the toxicities seen in humans. Finally, a specific drug target prediction is not
generalized to a class of drug, while an adverse event associated to a kinase (target) is a generalized
“systems” property and requires a more comprehensive design for validation.
Future studies and limitation. Adverse events occur in clinical studies where the tissue perfusion of
kinase inhibitor depends on its specific pharmacokinetics, while the in vitro binding affinity of a kinase
receptor to a kinase is measured as dissociation constant Kd. Our approach provides calculations of AE
and Kd jointly to create a compound score (PAS) and control for multiplicity. Thus significant PAS
scores are associated to a specific kinase, and may imply different underlying Kd values for this kinase
under different drug AE. It is a known fact that each drug may have a specific pharmacokinetic profile,
and thus the corresponding relevant in vitro Kd remains data driven in our study. This kind of limitation
in our study is also shared with previous published efforts to use incidence of adverse events as a means
to infer previously unrecognized and untested drug/target relationships[9-11, 13, 14, 16]. An important
advance upon the current method will be to integrate data on physiologically relevant pharmacokinetic
and pharmacodynamic properties of different drugs and targets. This will be most readily accomplished
by first performing clinical validation of some of the associations identified in this study.
We plan to conduct future studies to validate and extend the method with toxicity data from clinical trials
of novel kinase inhibitors sponsored by the National Cancer Institute. Better quantitative gold standard
data for adverse events might have been obtained from the US adverse event report system (AERS) and
the Canadian adverse event reporting and learning system (CAERLS). And a standardized ontology for
adverse event is needed which might be taken from Health Canada’s Canadian Adverse Drug Reaction
Monitoring Program (CADRMP, http://www.hc-sc.gc.ca/dhp-mps/medeff/databasdon/index-eng.php).
Biological validation of any specific target cannot be conducted using this method and would be a
complex pursuit. However, for strong candidates with multiple independent, but consistent data sources,
we would consider a human clinical trial the best, gold standard approach to biological validation.
Additionally, we will explore additional models involving pathways, multi-kinase effects, and other
models of drug/kinase inhibition beyond log-linear ones. However, by design, the physical kinome map
limits the breadth of our predictions to kinase toxicities. Arguably, other non-kinasetargets may exist and
are beyond our calculations; however it will be challenging to distinguish non-target specific effects from
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12
those of collective kinase inhibition. There is increasing evidence that many PKIs aren’t as specific as the
concept of “targeted therapy” implies[25].
5. CONCLUSION Predicting toxicities of kinase inhibitors is an important problem for clinical development of new drugs.
Current methods for predicting toxicities mainly rely on pre-clinical cell and animal studies[27]. Our in
silico method can predict associations between kinase targets and AE frequencies in human patients. This
method was controlled by false discovery, literature and expert review. Expert review further confirmed
that the method recapitulates existing empirical and mechanistic knowledge and provides novel and
clinically relevant insights (e.g. CSF1R/fatigue and KIT/fatigue). To our knowledge, this is the first study
using kinome binding patterns for predictions that proposes a novel Prioritized Association Score and
permutation resampling for increased sensitivity of results in spite of the scarcity of information about
adverse effects of kinase inhibitors.
Refining the method should lead to improved clinical development of protein kinase inhibitors, a large
new class of therapeutics[4]. 1) As some AE-KT relationships will only be apparent at the system
physiology level, comprehensive screening for AE-KT relationships in patients exposed to these drugs
provides the most readily available method for detecting these relationships. 2) This approach bypasses
the species differences in drug pharmacokinetics/pharmacodynamics that impair translation from animal
models. 3) Knowing AE-KT relationships can improve the safety and speed the completion of early trials
of new kinase inhibitors. For example if inhibition of a particular kinase is associated with
hypertriglyceridemia, then determining the active dose range of a novel PKI that blocks that KT could be
accelerated by measuring serum triglyceride elevations whether or not that KT is the intended target.
4) This approach also can inform selection from among the thousands of possible combinations of
currently available PKI’s, those that have the greatest likelihood for non-overlapping toxicity and hence a
better therapeutic index. 5) Finally, uncovering AE-KT relationships with novel PKI’s can reveal new
insight into the molecular physiology of the human body, leading to the identification of risk factors for
bad outcomes for some drugs and new clinical indications for others [4].
ACKNOWLEDGEMENTS This work was supported in part by the NIH/NLM/NCI National Center for Multiscale Analyses of
Genomic and Cellular Networks (MAGNET, 1U54CA121852), the NIH/NCRR Clinical & Translational
Science Awards (1U54 RR023560-01A1), The Cancer Research Foundation, The University of Chicago
Cancer Research Center, and The Ludwig Center for Metastasis Research. MLM is supported by
Mentored Career Development award K23CA124802. XY is partly supported by the Natural Science
Foundation of China 60971099.
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[9] Hansen NT, Brunak S, Altman RB. Generating genome-scale candidate gene lists for
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[10]Bender A, Scheiber J, Glick M, Davies JW, Azzaoui K, Hamon J, Urban L, Whitebread S, Jenkins JL.
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[11] Ji ZL, Han LY, Yap CW, Sun LZ, Chen X, Chen YZ. Drug Adverse Reaction Target Database
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[13] Fliri AF, Loging WT, Volkmann RA. Analysis of system structure-function relationships.
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[16] Campillos M, Kuhn M, Gavin AC, Jensen LJ, Bork P. Drug target identification using side-effect
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[17] Kuhn M, von Mering C, Campillos M, Jensen LJ, Bork P. STITCH: interaction networks of
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[19] Storey JD. The positive false discovery rate: A Bayesian interpretation and the q-value. Annals of
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[25] Fojo T. Commentary: Novel therapies for cancer: why dirty might be better. Oncologist 2008;13:
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[27] Shuler ML. Animal Surrogate Systems for Toxicity Testing In: McAuliffe GJ, Tatosian DA, editors.
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15
List of Supplementary Files
Supplementary Figure 1 - Histogram of raw Kd values (KD) and the log transformed Kd values
(KD.log).
Supplementary Figure 2 - Bipartite network of the prioritized AE-KT pairs identified using association
score.
Supplementary Figure 3. The predicted network of adverse events of kinase targets using text mining in
PubMed.
Supplementary Table 1 - The 72 normalized adverse events, their prevalences and thresholds of
frequencies.
Supplementary Table 2 - The 17 normalized adverse events for 20 PKIs and their frequencies (F) in
percentage.
Supplementary Table 3 - The 41 prioritized AE-KT pairs identified using prioritized association score.
Supplementary Table 4 - The manually verification resulted in 78 out of 105 significant (unadjusted p-
value≤0.05) AE-KT pairs that were identified using text mining in PubMed.
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J Biomed Inform. 2010 Jun;43(3):376-84. Epub 2010 May 1.
16
Supplementary Figures
Supplementary Figure 1 - Histogram of raw Kd values (KD) and the log transformed Kd values (KD.log). It
shows that logarithm transformation tends to convert the values to be analyzed from an exponential distribution to a
normal distribution.
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17
Kinase
AE
Line Width : Prediction Score (a)
a > 0.2 (median q < 1%)
0.2 ≥ a > 0.113 (q ≤ 21%)
Line Color: Evaluation in Review of Literature
red Also found in Literature Review
grey Not found in Literature Review
Supplementary Figure 2 – The predicted bipartite network of the prioritized AE-KT pairs using association
score. This network consists of 7 distinct AEs and 19 distinct kinase targets. As shown in the plot, a wider line
indicates a higher priority of association. The corresponding PAS prediction score (a) is labeled aside each AE-KT
linkage. Additionally, the AE-KT associations corroborated by literature review (Fisher’s exact test p≤0.05, and
manually verified) are presented in red. A Fisher’s Exact test showed a strongly significant (p=3x10-7
) association
between the discovery of the asssociation score and the literature review among these 45 predicted AE-KT pairs.The
maximum observed PAS score in our study was 0.33.
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18
Supplementary Figure 3. The predicted network of adverse events of kinase targets using text mining in
PubMed. The resulting 78 significant co-occurrences (p≤0.05, unadjusted Fisher’s Exact test on adverse events per
kinase; see Methods) consist of 14 AEs (appear in triangle) and 40 kinases (appear in circle). As shown in the plot,
the PAS predicted AE-KT pairs are presented in green. Since there are eight out of 41 predicted AE-KT pairs
recognized by text mining, a Fisher’s Exact Test showed a strongly significant over-representation between the
discovery of our quantitative method and the literature review for all 4,522 AE-KT pairs (p-value=3x10-7; see
Methods). Pairs of similar vertices (Nausea and Vomiting, Asthenia and Fatigue) were each merged into single
vertex, respectively.
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J Biomed Inform. 2010 Jun;43(3):376-84. Epub 2010 May 1.
19
Supplementary Table 1 - The 72* normalized adverse events, their prevalences and thresholds of frequencies.
Normalized Adverse
event Other Terms Included Prevalence Reference
Abdominal Distention 1.65% USA [1]
Abdominal Pain "abdominal pain or cramping";
"Pain, abdomen"
Mexico (46%) Brazil (43%) Japan (10%); 12.5%
placebo ; 0 placebo
Drug.com[2], [3],
[4]
Acne 6.25% USA [5]
Alopecia 0.15% in UK, incidence is 0.05-2% [6]
Altered taste "taste disturbance" ;"dysgeusia" <3%
Amblyopia >3%; 11.4% low income school children, Brazil. [7, 8]
Anemia 1.29% USA [9]
Anorexia 0.10% USA; 1.6% placebo [10]; Drugs.com[2]
Arrhythmia 5.3% USA; 0 placebo [11]
Arthralgia "joint pain"; "Pain, joint" >7 million USA; 6.8% woman 16.7% health pregnant
women [12]
Ascites
Asthma 6.4% USA;5.1% NHIS95;5 population (NWHIC) [13]
Atrioventricular block
first degree
0.113% incidence; 0.65-1.6% young adults ; 8.7%
trained athletes; 8% medical students [14]
Back Pain The lifetime prevalence has been estimated at anything
between 59% to 90% [15]
Bilirubinemia "hyperbilirubinemia " 3.1 -12.6 healthy infants [16]
Chest pain 2.21% USA; 2.1% placebo [17], [2]
Chills 35% in fever patients [18]
Congestive cardiac
failure
"Congestive Heart Failure/Cardiac
Dysfunction"
1.76% USA;2% age 40-59; 5% age 60-69; 10% over
70's [19]
Conjunctivitis "Keratoconjunctivitis sicca" [20]
Constipation 1.62% USA; 14.7% overall; 16% of children; and 15-
50% of the elderly; 3.8% placebo
[21], [2],
[22]
Coronary artery disease 4.85% USA (Coronary heart disease) [23]
Cough 0.00002% USA; 2.0% placebo [24], [2]
Dehydration 17.1% prevalence at admissions > 60 age; 6.7% elder;
0.55% in hospital [25], [26], [27]
Depression 5.3% USA; 0 placebo [28], [3]
Diarrhea "diarrhoea" 6.7% placebo; 100% USA [2]; [29]
Dizziness 4.8% orthostatic dizziness; 3.8% placebo; 1.7% or
5.9% placebo
[30]
[2]; [3]
Dry Skin 3.10% USA [31]
Dyspepsia 2.13% USA; 4.4% placebo; 5.9% placebo [32]; [2]; [3]
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Normalized Adverse
event Other Terms Included Prevalence Reference
20
Dyspnea 6-27% adult Sharon E Mace, An Introduction to
Clinical Emergency Medicine p485
Dysuria 0.6% of women 0.1% of men [33]
Ecchymoses Unknown
Edema
"Generalized Edema"; "Periorbital
edema"; "Peripheral edema";
"Superficial Edema"; "Palmar-
plantar erthrodysesthesia"
1.6% USA (variable with country) [34]
Epistaxis 2-4% using placebo; 60% [35, 36]
Exfoliative Dermatitis 10% of childhood due to allergy to certain foods [37]
Fatigue "weakness;"Asthenia"; "loss of
strength" 4% asthenia, 2.54% Fatigue [38, 39]
Fever "Pyrexia"; "rigors" 2.3% placebo; <2% [2]
Flatulence 5.4% placebo [2]
Fluid Retention "Other Fluid Retention"; Unknown
Folliculitis "follicular rash" 20-25% of adult USA [40]
Hand-foot skin reaction "hand-foot syndrome" [38], [41]
Headache "Pain, headache"; 7% headache; 16.54% in USA; 23.5%; 15.6 placebo [38], [41], [3]; [2]
Hemorrhage
"ocular hemorrhage"; "petechiae";
"tumor hemorrhage"; "Cerebral
hemorrhage"; "CNS Bleeding";
"gastrointestinal hemorrhage"; "GI
Bleeding"
1.4% for 49 years or olders [42]
Hyperglycaemia estimated to be 121 per 1000 patients [43]
Hyperkeratosis 7.1% in Taiwain, affects 1 person per 2,000 European [44], [45]
Hypertension "Pulmonary Hypertension" 18.38% USA; 1.1%; 2.9% placebo; 16.1% (Miller
2005)
[46]; [3],
[30], [47]
Hypokalemia published incidence ranging from 4.6% (Greenfeld,
1995) to 19.7% (Miller, 2005) [48], [47]
Hypotension 10.7% for all, 20% elderly individuals (Postural
hypotension ) [49]
Hypothyroidism and/or
increased TSH 0.55% USA [50]
Increased lacrimation
Infection
"Infection (bacterial, fungal, non-
spec)"; "influenza"; "Urinary Tract
Infection"
1.1% placebo; 34%/13.9%/53.5% of
adults >20/woman/man; 3% children Urinary Tract
Infection;
[2]; [51]
Inhibit the cardiac QT
interval "prolonged QT interval"
9.2% in Caucasian patient with heart disease , while
6.5% US population reported a history of heart disease [52], [53]
Insomnia 11.76% USA; 3.4% placebo [54], [2]
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Normalized Adverse
event Other Terms Included Prevalence Reference
21
Liver Enzymes
"ALP elevation"; "ALT elevation";
"ALT increased"; "AST
increased"; "Elevated
transaminases"; "gamma GT
increase"; "GGT increased"
11.6% among 40 years old woman in Tawain; more
than 15% of Greek blood donors exhibit elevated liver
enzymes
[55], [56]
Lymphopenia Unknown
Mucositis
"Mucositis/stomatitis"; "Mucosal
Inflammation (incl.
mucositis/stomatitis)"; "Mucosal
inflammation"; "mouth ulcer";
"Stomatitis"
19.5% control group [57]
Musculoskeletal Pain
"muscle cramps"; "Myalgia";
"Myalgia/limb pain"; "Pain in
extremity"; "bone pain"
2.21% back pain USA; 5.9% placebo; 4.7-74.4%
Spinak or back pain [58], [3];
Nausea "CML nausea" 7.4% placebo [2]
Neuropathy "Neuropathy-sensory"; "Sensory
neuropathy" 20 million Peripheral neuropathy USA => 6.7% [59]
Neutropenia " Febrile
neutropenia" ;"neutropenia"
in the US, it is estimated that there is approximately
one case per 100,000 population (Dale, unpublished
observations)
[60]
Night sweats 41% [61]
Pain
"Pain, other than abdominal";
"pharyngolaryngeal pain"; "Jaw
Pain"
2.9% placrbo [3]
Pericardial Effusion
"Pleural Effusion"; "pleural
effusion or pulmonary edema
hemorrhage"; "Pulmonary
Edema"; "pulmonary embolism";
"angioedema"
2 to 3.5% of all large effusion [62]
Proteinuria 2.43-3.54% [63]
Pruritus 1.3% placebo [2]
Rash
"Rash and Related";
"Rash/desquamation"; "Skin
Rash"; "vesiculobullous rash";
"acneiform rash"; maculopapular
rash
2.1% placebo [2]
Reduced LVEF
16.7% in older (63 ± 11 ) diabetic patients having
more peripheral arterial disease; while maximum
prevalence of diabete is 5%
[64, 65]
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Normalized Adverse
event Other Terms Included Prevalence Reference
22
Respiratory Tract
Infection
"Rhinitis"; "sinusitis"; "sore
throat"; "upper respiratory tract
infection"; "Upper Respiratory
Tract Infection/Inflam";
"Interstitial lung disease
(interstitial pneumonia,
pneumonitis and alveolitis)";
nasopharyngitis; pneumonia
23.6% cold; 36% Flu; 15% Upper Respiratory
Infection; [66]
Skin Discoloration 1% in adult placebo; 3% in treatment patients in adults [67]
Thrombocytopenia 0.01% (Autoimmune Thrombocytopenia); 0.7%
(neonatal thrombocytopenia ) [68], [69]
Troponin I increase 3% in patients without pulmonary embolism [70]
Vomiting 5.6% placebo; 1.7% placebo Drugs.com[2]; dailymed
Weight Change
"Weight Decreased"; "Weight
Increase"; "weight increased";
weight loss; "GIST weight gain"
9.3% gain and 15% lose over 1 y [71]
*In this table, the adverse event “Asthenia” was merged with “Fatigue” because they are similar, and we further divided the adverse event “Pain”
into “Back Pain”, “Chest Pain” and “Pain” because their different incidences.
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23
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26
Supplementary Table 2 - The 17 normalized adverse events for 20 PKIs and their frequencies (F) in
percentage
PKI Name/Generic/Trade Company F (%) Adverse event Normalized
Adverse event Ref.
AMG-706 ("Motesanib diphosphate")
Amgen 70.0 diarrhea Diarrhea 1
AMG-706 ("Motesanib diphosphate")
Amgen 58.0 fatigue Fatigue 1
AMG-706 ("Motesanib diphosphate")
Amgen 43.0 headache Headache 1
AMG-706 ("Motesanib diphosphate")
Amgen 49.0 hypertension Hypertension 1
AMG-706 ("Motesanib diphosphate")
Amgen 40.0 nausea Nausea 1
BMS-387032/SNS-032 Sunesis 45.0 Abdominal Pain or cramping Abdominal Pain 5
BMS-387032/SNS-032 Sunesis 30.0 Anorexia Anorexia 5
BMS-387032/SNS-032 Sunesis 35.0 constipation Constipation 5
BMS-387032/SNS-032 Sunesis 30.0 Cough Cough 5
BMS-387032/SNS-032 Sunesis 30.0 Diarrhea Diarrhea 5
BMS-387032/SNS-032 Sunesis 90.0 Fatigue Fatigue 5
BMS-387032/SNS-032 Sunesis 35.0 nausea Nausea 5
CHIR-258/TKI-258 Novartis 17.1 Anorexia Anorexia 6
CHIR-258/TKI-258 Novartis 5.7 diarrhea Diarrhea 6
CHIR-258/TKI-258 Novartis 31.4 fatigue Fatigue 6
CHIR-258/TKI-258 Novartis 14.3 headache Headache 6
CHIR-258/TKI-258 Novartis 5.7 hypertension Hypertension 6
CHIR-258/TKI-258 Novartis 28.6 nausea Nausea 6
CHIR-258/TKI-258 Novartis 22.9 Vomiting Vomiting 6
CI-1033 Pfizer 19.1 abdominal pain Abdominal Pain 7
CI-1033 Pfizer 28.6 Anorexia Anorexia 7
CI-1033 Pfizer 40.0 Asthenia Asthenia 7
CI-1033 Pfizer 11.4 constipation Constipation 7
CI-1033 Pfizer 70.5 Diarrhea Diarrhea 7
CI-1033 Pfizer 24.8 Dry Skin Dry Skin 7
CI-1033 Pfizer 48.6 Mucositis Mucositis 7
CI-1033 Pfizer 48.6 nausea Nausea 7
CI-1033 Pfizer 11.4 pruritus Pruritus 7
CI-1033 Pfizer 46.7 Rash Rash 7
CI-1033 Pfizer 11.4 rhinitis Respiratory Tract
Infection 7
CI-1033 Pfizer 40.0 Vomiting Vomiting 7
CP-724714 Pfizer 33.3 Abdominal Pain Abdominal Pain 10
CP-724714 Pfizer 16.7 Anorexia Anorexia 10
CP-724714 Pfizer 43.3 Asthenia Asthenia 10
CP-724714 Pfizer 10.0 cough Cough 10
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CP-724714 Pfizer 16.7 diarrhea Diarrhea 10
CP-724714 Pfizer 20.0 Drspnea Dyspnea 10
CP-724714 Pfizer 46.0 fatigue Fatigue 9
CP-724714 Pfizer 10.0 headache Headache 10
CP-724714 Pfizer 10.0 Hypotension Hypotension 10
CP-724714 Pfizer 60.0 nausea Nausea 10
CP-724714 Pfizer 20.0 pruritus Pruritus 10
CP-724714 Pfizer 33.3 Rash Rash 10
CP-724714 Pfizer 23.3 Respiratory Tract Infection Respiratory Tract
Infection 10
CP-724714 Pfizer 23.3 Vomiting Vomiting 10
Dasatinib/"Sprycel" Bristol-Myers
13.0 Chest Pain Abdominal Pain T
Dasatinib/"Sprycel" Bristol-Myers
19.0 Anorexia Anorexia T
Dasatinib/"Sprycel" Bristol-Myers
19.0 Asthenia Asthenia T
Dasatinib/"Sprycel" Bristol-Myers
14.0 constipation Constipation T
Dasatinib/"Sprycel" Bristol-Myers
28.0 Cough Cough T
Dasatinib/"Sprycel" Bristol-Myers
49.0 Diarrhea Diarrhea T
Dasatinib/"Sprycel" Bristol-Myers
32.0 Dyspnea Dyspnea T
Dasatinib/"Sprycel" Bristol-Myers
39.0 Fatigue Fatigue T
Dasatinib/"Sprycel" Bristol-Myers
40.0 Headache Headache T
Dasatinib/"Sprycel" Bristol-Myers
1.0 Pulmonary Hypertension Hypertension T
Dasatinib/"Sprycel" Bristol-Myers
16.0 Mucosal Inflammation (incl. mucositis/stomatitis)
Mucositis T
Dasatinib/"Sprycel" Bristol-Myers
34.0 Nausea Nausea T
Dasatinib/"Sprycel" Bristol-Myers
11.0 pruritus Pruritus T
Dasatinib/"Sprycel" Bristol-Myers
35.0 Skin Rash Rash T
Dasatinib/"Sprycel" Bristol-Myers
11.0 pneumonia Respiratory Tract
Infection T
Dasatinib/"Sprycel" Bristol-Myers
22.0 Vomiting Vomiting T
EKB-569 Wyeth 41.0 Anorexia Anorexia 11
EKB-569 Wyeth 66.0 asthenia Asthenia 11
EKB-569 Wyeth 10.0 constipation Constipation 11
EKB-569 Wyeth 93.0 diarrhea Diarrhea 11
EKB-569 Wyeth 17.0 Dry Skin Dry Skin 11
EKB-569 Wyeth 45.0 Stomatitis Mucositis 11
EKB-569 Wyeth 45.0 Nausea Nausea 11
EKB-569 Wyeth 14.0 pruritus Pruritus 11
EKB-569 Wyeth 83.0 rash Rash 11
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EKB-569 Wyeth 28.0 Vomiting Vomiting 11
Erlotinib/"Tarceva" Genentech; OSI
11.0 Abdominal pain Abdominal Pain T
Erlotinib/"Tarceva" Genentech; OSI
52.0 Anorexia Anorexia T
Erlotinib/"Tarceva" Genentech; OSI
33.0 Cough Cough T
Erlotinib/"Tarceva" Genentech; OSI
54.0 Diarrhea Diarrhea T
Erlotinib/"Tarceva" Genentech; OSI
12.0 Dry Skin Dry Skin T
Erlotinib/"Tarceva" Genentech; OSI
41.0 Dyspnea Dyspnea T
Erlotinib/"Tarceva" Genentech; OSI
52.0 Fatigue Fatigue T
Erlotinib/"Tarceva" Genentech; OSI
17.0 Stomatitis Mucositis T
Erlotinib/"Tarceva" Genentech; OSI
33.0 Nausea Nausea T
Erlotinib/"Tarceva" Genentech; OSI
13.0 Pruritus Pruritus T
Erlotinib/"Tarceva" Genentech; OSI
75.0 Rash Rash T
Erlotinib/"Tarceva" Genentech; OSI
23.0 Vomiting Vomiting T
Gefitinib/ "Iressa" AstraZeneca 62.5 anorexia Anorexia P
Gefitinib/ "Iressa" AstraZeneca 62.5 asthenia Asthenia P
Gefitinib/ "Iressa" AstraZeneca 62.5 diarrhea Diarrhea P
Gefitinib/ "Iressa" AstraZeneca 62.5 dry skin Dry Skin P
Gefitinib/ "Iressa" AstraZeneca 17.5 dyspnea Dyspnea P
Gefitinib/ "Iressa" AstraZeneca 17.5 mouth ulcer Mucositis P
Gefitinib/ "Iressa" AstraZeneca 62.5 nausea Nausea P
Gefitinib/ "Iressa" AstraZeneca 62.5 pruritus Pruritus P
Gefitinib/ "Iressa" AstraZeneca 17.5 vesiculobullous rash Rash P
Gefitinib/ "Iressa" AstraZeneca 1.0 Interstitial lung disease (interstitial pneumonia, pneumonitis and alveolitis)
Respiratory Tract Infection
P
Gefitinib/ "Iressa" AstraZeneca 62.5 vomiting Vomiting P
GW-786034/ "Pazopanib" GlaxoSmithKline
3.9 Dyspnea
Dyspnea 12
GW-786034/ "Pazopanib" GlaxoSmithKline
3.9 Hypertension
Hypertension 12
GW-786034/ "Pazopanib" GlaxoSmithKline
3.9 pneumonia
Respiratory Tract Infection
12
Imatinib/"GLEEVEC" Novartis 62.5 Abdominal pain Abdominal Pain P
Imatinib/"GLEEVEC" Novartis 36.5 abdominal pain Abdominal Pain T
Imatinib/"GLEEVEC" Novartis 17.5 Anorexia Anorexia P
Imatinib/"GLEEVEC" Novartis 17.5 asthenia, weakness Asthenia P
Imatinib/"GLEEVEC" Novartis 11.4 constipation Constipation T
Imatinib/"GLEEVEC" Novartis 20.0 cough Cough T
Imatinib/"GLEEVEC" Novartis 45.4 Diarrhea Diarrhea T
Imatinib/"GLEEVEC" Novartis 17.5 Dyspnea Dyspnea P
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Imatinib/"GLEEVEC" Novartis 38.8 fatigue Fatigue T
Imatinib/"GLEEVEC" Novartis 37.0 headache Headache T
Imatinib/"GLEEVEC" Novartis 17.5 hypokalemia Hypokalemia P
Imatinib/"GLEEVEC" Novartis 49.5 nausea Nausea T
Imatinib/"GLEEVEC" Novartis 17.5 pruritus Pruritus P
Imatinib/"GLEEVEC" Novartis 40.1 Rash and Related Rash T
Imatinib/"GLEEVEC" Novartis 11.4 sinusitis
Respiratory Tract Infection
T
Imatinib/"GLEEVEC" Novartis 22.5 vomiting Vomiting T
Lapatinib/"TYKERB" GlaxoSmithKline
65.0 Diarrhea Diarrhea T
Lapatinib/"TYKERB" GlaxoSmithKline
10.0 Dry skin Dry Skin T
Lapatinib/"TYKERB" GlaxoSmithKline
12.0 Dyspnea Dyspnea T
Lapatinib/"TYKERB" GlaxoSmithKline
15.0 Mucosal inflammation Mucositis T
Lapatinib/"TYKERB" GlaxoSmithKline
44.0 Nausea Nausea T
Lapatinib/"TYKERB" GlaxoSmithKline
28.0 Rash Rash T
Lapatinib/"TYKERB" GlaxoSmithKline
26.0 Vomiting Vomiting T
LY-333531 "Ruboxistaurin"
Eli Lilly and Company
24.4 Diarrhea
Diarrhea 13
MLN-518/ "Tandutinib" Millennium 42.5 Diarrhea Diarrhea 14
MLN-518/ "Tandutinib" Millennium 47.5 Nausea Nausea 14
MLN-518/ "Tandutinib" Millennium 37.5 Vomiting Vomiting 14
PKC-412/ "Midostaurin" Novartis 41.0 diarrhoea Diarrhea 3
PKC-412/ "Midostaurin" Novartis 41.0 fatigue Fatigue 3
PKC-412/ "Midostaurin" Novartis 41.0 nausea Nausea 3
PKC-412/ "Midostaurin" Novartis 41.0 vomiting Vomiting 3
PTK-787/ "Vatalanib" Novartis 100.
0 Fatigue Fatigue 15
PTK-787/ "Vatalanib" Novartis Hypertension Hypertension 15
Roscovitine/CYC-202/ "Seliciclib" Cyclacel
8.3 Anorexia Anorexia 16
Roscovitine/CYC-202/ "Seliciclib" Cyclacel
8.3 Fatigue Fatigue 16
Roscovitine/CYC-202/ "Seliciclib" Cyclacel
8.3 Hyponatraemia Hypokalemia 16
Roscovitine/CYC-202/ "Seliciclib" Cyclacel
8.3 Hypotension Hypotension 16
Roscovitine/CYC-202/ "Seliciclib" Cyclacel
8.3 Rash Rash 16
Sorafenib "Nexavar" Bayer 11.0 Pain, abdomen Abdominal Pain T
Sorafenib "Nexavar" Bayer 16.0 Anorexia Anorexia T
Sorafenib "Nexavar" Bayer 15.0 Constipation Constipation T
Sorafenib "Nexavar" Bayer 13.0 Cough Cough T
Sorafenib "Nexavar" Bayer 43.0 Diarrhea Diarrhea T
Sorafenib "Nexavar" Bayer 11.0 Dry skin Dry Skin T
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30
Sorafenib "Nexavar" Bayer 14.0 Dyspnea Dyspnea T
Sorafenib "Nexavar" Bayer 37.0 Fatigue Fatigue T
Sorafenib "Nexavar" Bayer 10.0 Pain, headache Headache T
Sorafenib "Nexavar" Bayer 17.0 Hypertension Hypertension T
Sorafenib "Nexavar" Bayer 23.0 Nausea Nausea T
Sorafenib "Nexavar" Bayer 19.0 Pruritus Pruritus T
Sorafenib "Nexavar" Bayer 40.0 Rash/desquamation Rash T
Sorafenib "Nexavar" Bayer 16.0 Vomiting Vomiting T
Sunitinib malate/ "SUTENT"
Pfizer 33.0 Anorexia
Anorexia T
Sunitinib malate/ "SUTENT"
Pfizer 22.0 Asthenia
Asthenia T
Sunitinib malate/ "SUTENT"
Pfizer 20.0 constipation
Constipation T
Sunitinib malate/ "SUTENT"
Pfizer 40.0 Diarrhea
Diarrhea T
Sunitinib malate/ "SUTENT"
Pfizer 15.0 Hypertension
Hypertension T
Sunitinib malate/ "SUTENT"
Pfizer 29.0 Mucositis/stomatitis
Mucositis T
Sunitinib malate/ "SUTENT"
Pfizer 14.0 rash
Rash T
ZD-6474 ("Vandetanib" "Zactima")
AstraZeneca 13.0 anorexia
Anorexia 2
ZD-6474 ("Vandetanib" "Zactima")
AstraZeneca 37.7 diarrhea
Diarrhea 2
ZD-6474 ("Vandetanib" "Zactima")
AstraZeneca 18.2 fatigue
Fatigue 2
ZD-6474 ("Vandetanib" "Zactima")
AstraZeneca 18.2 hypertension
Hypertension 2
ZD-6474 ("Vandetanib" "Zactima")
AstraZeneca 19.5 nausea
Nausea 2
ZD-6474 ("Vandetanib" "Zactima")
AstraZeneca 10.4 maculopapular rash
Rash 2
T: Thompson PDR (online); P: PharmGKB
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J Biomed Inform. 2010 Jun;43(3):376-84. Epub 2010 May 1.
31
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10. Pamela N. Munster1, Carolyn D. Britten2, Monica Mita3, Karen Gelmon4, Susan E.
Minton1, Stacy Moulder1, Dennis J. Slamon2, Feng Guo5, Stephen P. Letrent5,
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(May 20), 2006: pp. 2252-2260
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Druker and Michael C Heinrich. Phase I clinical results with tandutinib (MLN518), a
novel FLT3 antagonist, in patients with acute myelogenous leukemia or high-risk
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J Biomed Inform. 2010 Jun;43(3):376-84. Epub 2010 May 1.
33
Supplementary Table 3 - The 41 prioritized AE-KT pairs identified using prioritized association score. The evaluated significant (p ≤ 0.05) pairs are
highlighted in red for their p-values of co-occurrence. The PKIs of each kinase are obtained from the paper of Karaman et al (2008).
Computation Prediction Literature Evaluation Kinome Map (PKI in Brown bold)
Target AE Score p q-value Fisher.p #KT #AE #KT &
AE Drugs(Kd<100nM)
EGFR Asthenia 0.13 <0.01 <0.01 < 0.001 11,087 4,401 9 CI.1033, CP.724714, EKB.569, Gefitinib
EGFR Diarrhea 0.33 <0.01 <0.01 < 0.001 10,908 68,235 133 AMG.706, CI.1033, CP.724714, EKB.569, Erlotinib, Gefitinib, Lapatinib, ZD.6474
EGFR Rash 0.2 <0.01 <0.01 < 0.001 10,908 15,264 181 CI.1033, CP.724714, EKB.569, Erlotinib, Gefitinib, Lapatinib, ZD.6474
ERBB2 Asthenia 0.12 <0.01 <0.01 < 0.001 11,087 4,401 11 CI.1033, CP.724714
ERBB2 Rash 0.16 <0.01 <0.01 < 0.001 11,087 15,264 33 CI.1033, CP.724714, Lapatinib
KIT Diarrhea 0.12 0.26 0.21 < 0.001 22,406 68,235 195 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, MLN.518, Sorafenib, Sunitinib
ERBB2 Nausea 0.25 <0.01 <0.01 0.01 11,087 35,735 32 CI.1033, CP.724714, Lapatinib
VEGFR2 Fatigue 0.13 0.02 0.21 0.05 582 44,331 4 AMG.706, CHIR.258.TKI.258, PTK.787, Sorafenib
ERBB4 Asthenia 0.11 0.01 0.15 0.17 811 4,401 1 CI.1033, Dasatinib, EKB.569
LOK Diarrhea 0.2 0.03 0.21 0.22 1,595 68,235 8 AMG.706, Sunitinib, ZD.6474
ERBB2 Diarrhea 0.23 <0.01 <0.01 0.23 11,087 68,235 45 CI.1033, CP.724714, Lapatinib
EGFR Fatigue 0.13 0.06 0.21 0.27 11,087 44,331 29 AMG.706, CP.724714, Erlotinib, ZD.6474
LOK Nausea 0.14 0.12 0.21 0.35 1,595 35,735 4 AMG.706, ZD.6474
ERBB4 Rash 0.16 <0.01 <0.01 0.48 811 15,264 1 CI.1033, Dasatinib, EKB.569, Lapatinib
EGFR Nausea 0.33 <0.01 <0.01 0.49 11,087 35,735 21 AMG.706, CI.1033, CP.724714, EKB.569, Erlotinib, Gefitinib, Lapatinib, ZD.6474
ERBB4 Diarrhea 0.24 0.01 0.15 0.56 811 68,235 3 CI.1033, Dasatinib, EKB.569, Lapatinib
PDGFRB Fatigue 0.17 0.02 0.21 0.56 2,582 44,331 6 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, PTK.787, Sorafenib, ZD.6474
PDGFRB Diarrhea 0.12 0.24 0.21 0.58 2,582 68,235 9 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, MLN.518, Sorafenib, Sunitinib, ZD.6474
FLT1 Fatigue 0.15 0.08 0.21 0.64 435 44,331 1 AMG.706, CHIR.258.TKI.258, PTK.787, Sorafenib
PDGFRA Diarrhea 0.12 0.19 0.21 0.64 2,427 68,235 8 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, MLN.518, Sorafenib, Sunitinib
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34
ERBB4 Nausea 0.25 0.02 0.21 0.78 811 35,735 1 CI.1033, Dasatinib, EKB.569, Lapatinib
PDGFRA Fatigue 0.16 0.01 0.15 0.82 2,427 44,331 4 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, PTK.787, Sorafenib
ZAK Fatigue 0.12 0.13 0.21 0.95 1,998 44,331 4 AMG.706, Dasatinib, Sorafenib
KIT Fatigue 0.17 0.03 0.21 0.97 22,406 44331 40 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, PTK.787, Sorafenib
ERBB2 Vomiting 0.14 <0.01 <0.01 0.99 11,087 45,907 15 CI.1033, CP.724714, Lapatinib
CDK11 Nausea 0.12 0.2 0.21 1 28 35,735 0
CSF1R Fatigue 0.16 0.03 0.21 1 4,915 44,331 1 AMG.706, CHIR.258.TKI.258, Dasatinib, Imatinib, PTK.787, Sorafenib
DDR1 Diarrhea 0.12 0.15 0.21 1 121 68,235 0 AMG.706, Imatinib, Sorafenib, ZD.6474
DDR1 Fatigue 0.15 0.03 0.21 1 121 44,331 0 AMG.706, Imatinib, Sorafenib, ZD.6474
EGFR Vomiting 0.18 <0.01 <0.01 1 11,087 45,907 14 CI.1033, CP.724714, EKB.569, Erlotinib, Gefitinib, Lapatinib
ERBB4 Vomiting 0.14 0.01 0.15 1 811 45,907 0 CI.1033, Dasatinib, EKB.569, Lapatinib
FLT4 Fatigue 0.13 0.1 0.21 1 82 44,331 0 AMG.706, Sorafenib
FRK Fatigue 0.13 0.05 0.21 1 131 44,331 0 AMG.706, Dasatinib
LCK Diarrhea 0.12 0.2 0.21 1 2,370 68,235 1 AMG.706, EKB.569, Imatinib, ZD.6474
LYN Diarrhea 0.11 0.16 0.21 1 1,545 68,235 0 Dasatinib
MKNK2 Nausea 0.13 0.13 0.21 1 21 35,735
RIPK2 Diarrhea 0.16 0.11 0.21 1 93 68,235 0 CI.1033, ZD.6474
RIPK2 Nausea 0.11 0.25 0.21 1 93 35,735 0 CI.1033, ZD.6474
EGFR Edema 0.15 0.02 0.21 1 11,087 100,00
0 22 Dasatinib, Lapatinib
ERBB2 Edema 0.13 0.03 0.21 1 11,087 100,00
0 3 Lapatinib
ERBB4 Edema 0.12 0.08 0.21 1 811 100,00
0 0 Dasatinib, Lapatinib
-: no primary targets are given in the paper of Karaman et al (2008).
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35
Supplementary Table 4 - The manually verification resulted in 78 out of 105 significant (unadjusted p-value≤0.05) AE-KT pairs
that were identified using text mining in PubMed. Adjusted p-value ≤ 5% results followed by those with unadjusted p-value ≤ 5% but
adj. p-value > 5%.
KT AE #co-
occurrence fisher
.p adjusted.p #KT #SE
Method
Verification Annotation
ACVRL1 Hypertension 17 0 0 158 100,000
AKT1 Hypertension 54 0 0 3,866 100,000
ALK Hypertension 21 0 0 2,025 100,000
CSK Hypertension 28 0 0 1,523 100,000
CSK Respiratory Tract Infection 37 0 0 1,523 100,000
DLK Hypertension 7 0 0 229 100,000
EGFR Asthenia 9 0 0 10,928 4,401 1
EGFR Diarrhea 133 0 0 10,928 68,235 1+2 [1], [2], [3]
EGFR Dry Skin 11 0 0 10,928 3,220
EGFR Hypertension 198 0 0 10,928 100,000
EGFR Rash 181 0 0 10,928 15,264 1+2 [3], [2]
ERBB2 Asthenia 11 0 0 11,109 4,401 1 [4]
ERBB2 Rash 33 0 0 11,109 15,264 1 [5], [6]
FES Fatigue 83 0 0 2,385 44,331
FES Rash 7 0 0 2,385 15,264
FGFR2 Mucositis 6 0 0 1,251 4,500
FGR Hypertension 33 0 0 616 100,000
FLT1 Hypertension 27 0 0 437 100,000
IGF1R Hypertension 32 0 0 3,207 100,000
INSR Hypertension 15 0 0 162 100,000
KIT Abdominal Pain 89 0 0 22,433 46,779
KIT Constipation 34 0 0 22,433 13,434
KIT Diarrhea 196 0 0 22,433 68,235 1 [6]
KIT Hypertension 159 0 0 22,433 100,000
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KT AE # co-
occurrence fisher.p adjusted.p
#KT #SE Method Verification Annotation
36
KIT Rash 31 0 0 22,433 15,264
KIT Respiratory Tract Infection 342 0 0 22,433 100,000
LOK Abdominal Pain 15 0 0 1,598 46,779
LOK Hypertension 18 0 0 1,598 100,000
LOK Respiratory Tract Infection 21 0 0 1,598 100,000
MEK1 Hypertension 29 0 0 2,448 100,000
MLCK Hypertension 12 0 0 821 100,000
MUSK Cough 10 0 0 1,521 28,493
MUSK Dyspnea 11 0 0 1,521 27,119
MUSK Nausea 13 0 0 1,521 35,735
MUSK Vomiting 49 0 0 1,521 45,907
MYLK2 Hypertension 89 0 0 3,604 100,000
PDGFRA Hypertension 43 0 0 2,428 100,000
PDGFRB Hypertension 64 0 0 2,583 100,000
PRKCE Hypertension 9 0 0 588 100,000
PTK2B Hypertension 8 0 0 231 100,000
RET Constipation 17 0 0 3,762 13,434 2 [7], [8], [9]
RET Hypertension 36 0 0 3,762 100,000 2 [10], [11]
SLK Abdominal Pain 4 0 0 160 46,779
TIE2 Hypertension 14 0 0 577 100,000
VEGFR2 Hypertension 10 0 0 584 100,000
ALK Fatigue 11 0.01 0.595 2,025 44,331
DDR2 Hypertension 3 0.01 0.595 71 100,000
ERBB2 Nausea 32 0.01 0.595 11,109 35,735 1 [12]
FER Constipation 3 0.01 0.595 685 13,434
FER Mucositis 2 0.01 0.595 685 4,500
LOK Rash 5 0.01 0.595 1,598 15,264
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KT AE # co-
occurrence fisher.p adjusted.p
#KT #SE Method Verification Annotation
37
PDGFRA Rash 6 0.01 0.595 2,428 15,264
SLK Hypertension 4 0.01 0.595 160 100,000
TEC Anorexia 6 0.01 0.595 1,705 20,259
ACVRL1 Dyspnea 2 0.02 1 158 27,119
EGFR Mucositis 7 0.02 1 10,928 4,500 2 [13]
ERBB2 Mucositis 7 0.02 1 11,109 4,500
FER Dyspnea 4 0.02 1 685 27,119
LOK Pruritus 4 0.02 1 1,598 12,739
MST1 Dry Skin 1 0.02 1 129 3,220
PHKG2 Fatigue 1 0.02 1 9 44,331
PRKCD Hypertension 9 0.02 1 783 100,000
PRKX Constipation 1 0.02 1 25 13,434
MEK2 Dry Skin 1 0.03 1 205 3,220
MUSK Fatigue 8 0.03 1 1,521 44,331
PRKCH Hypertension 1 0.03 1 6 100,000
TEC Dry Skin 2 0.03 1 1,705 3,220
ANKK1 Fatigue 1 0.04 1 18 44,331
EGFR Pruritus 13 0.04 1 10,928 12,739
FES Anorexia 6 0.04 1 2,385 20,259
LOK Cough 6 0.04 1 1,598 28,493
TNK1 Respiratory Tract Infection 1 0.04 1 8 100,000
FES Respiratory Tract Infection 19 0.05 1 2,385 100,000
MEK2 Asthenia 1 0.05 1 205 4,401
STK36 Respiratory Tract Infection 1 0.05 1 9 100,000
VEGFR2 Fatigue 4 0.05 1 584 44,331 1
[14], [15], [16], [17]
CIT Diarrhea 26 0 0 2185 68235 2 Rejected CIT=city in address
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KT AE # co-
occurrence fisher.p adjusted.p
#KT #SE Method Verification Annotation
38
GAK Anorexia 3 0 0 126 20259 2 Rejected Gak as institute name
MET Abdominal Pain 256 0 0 66248 46779 Rejected "Methods" "metabolic equivalents"
MET Anorexia 249 0 0 66248 20259 Rejected "Methods" "metabolic equivalents"
MET Asthenia 29 0 0 66248 4401 Rejected "Methods" "metabolic equivalents"
MET Constipation 123 0 0 66248 13434 Rejected "Methods" "metabolic equivalents"
MET Cough 170 0 0 66248 28493 Rejected "Methods" "metabolic equivalents"
MET Diarrhea 387 0 0 66248 68235 Rejected "Methods" "metabolic equivalents"
MET Dyspnea 143 0 0 66248 27119 Rejected "Methods" "metabolic equivalents"
MET Fatigue 471 0 0 66248 44331 Rejected "Methods" "metabolic equivalents"
MET Headache 457 0 0 66248 45968 Rejected "Methods" "metabolic equivalents"
MET Hypertension 1153 0 0 66248 100,000 Rejected "Methods" "metabolic equivalents"
MET Nausea 388 0 0 66248 35735 Rejected "Methods" "metabolic equivalents"
MET Rash 113 0 0 66248 15264 Rejected "Methods" "metabolic equivalents"
MET Respiratory Tract Infection 825 0 0 66248 100,000 Rejected "Methods" "metabolic equivalents"
MET Vomiting 357 0 0 66248 45907 Rejected "Methods" "metabolic equivalents"
YES Headache 37 0 0 5212 45968 Rejected as" Yes/no"
YES Hypertension 81 0 0 5212 100,000 Rejected as" Yes/no"
ZAK Respiratory Tract Infection 21 0 0 1999 100,000 Rejected ZAk as author name
FER Hypertension 18 0 0 685 100,000 Rejected "Fer" as author name
SRC Hypertension 170 0 0 20648 100,000 Rejected "scleroderma renal crisis "
MET Mucositis 27 0.01 0.595 66248 4500 Rejected "Methods" "metabolic equivalents"
ZAK Hypertension 18 0.02 1 1999 100,000 Rejected ZAk as author name
GAK Respiratory Tract Infection 3 0.03 1 126 100,000 Rejected Gak as institute name
GAK Abdominal Pain 2 0.04 1 126 46779 Rejected Gak as institute name
GAK Headache 2 0.04 1 126 45968 Rejected Gak as institute name
TEC Respiratory Tract Infection 15 0.04 1 1705 100,000 Rejected
"toxigenic Escherichia coli " "total eosinophil counts " etc.
YES Dyspnea 13 0.04 1 5212 27119 Rejected as" Yes/no"
YES Respiratory Tract Infection 37 0.05 1 5212 100,000 Rejected as" Yes/no"
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39
References of Suppl. Table 4:
1. Herbst, R.S., et al., Selective oral epidermal growth factor receptor tyrosine kinase inhibitor ZD1839
is generally well-tolerated and has activity in non-small-cell lung cancer and other solid tumors:
results of a phase I trial. J Clin Oncol, 2002. 20(18): p. 3815-25.
2. Erlichman, C., et al., Phase I study of EKB-569, an irreversible inhibitor of the epidermal growth
factor receptor, in patients with advanced solid tumors. J Clin Oncol, 2006. 24(15): p. 2252-60.
3. Ito, Y., et al., Does lapatinib, a small-molecule tyrosine kinase inhibitor, constitute a breakthrough in
the treatment of breast cancer? Breast Cancer, 2007. 14(2): p. 156-62.
4. Gasparini, G., et al., Gefitinib (ZD1839) combined with weekly epirubicin in patients with metastatic
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