molecular biology, biomarkers, and tcga...molecular biology, biomarkers, and tcga jean-pascal...
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MOLECULAR BIOLOGY, BIOMARKERS,
AND TCGA
Jean-Pascal Machiels
Department of medical oncology
Institut Roi Albert II
Cliniques universitaires Saint-Luc
Université catholique de Louvain, Brussels, Belgium
I
DISCLOSURE SLIDE
Advisory board member or speaker with honoraria (managed by my Institution): Pfizer,
Roche, Astra/Zeneca, Bayer, Innate, Merck Serono, Boerhinger, BMS, Novartis, Janssen,
Incyte, …
Travel expenses: Amgen, BMS, Pfizer, MSD, …
Data safety monitoring board with honoraria: Debio, Nanobiotix
Institutional conflict of interest (Funding to institution for research support): all companies
Uncompensated advisory role: MSD
EORTC: investigator and study coordinator
• Key molecular biology features of HPV-negative
and positive head and neck cancer
• Prognosis value of p16 and EGFR
• Predictive biomarkers: EGFR, p16 and PD-L1
Learning objectives
Squamous cell carcinoma of the head and neck
The seventh most common form of cancer
600 000 cases per year worldwide
➔Human Papillomavirus (HPV+)
(oropharynx)
➔Alcohol & tabacco(oral cavity, larynx and pharynx)
0
10
20
30
40
50
60
70
80
90
100
% s
urv
ivin
g
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Years from RT
p16 posp16 neg
HR = 0.36, P = 0.0042-y OS: 74% & 91%
.125.25 .5 1 2 4
Hazard ratio 95% CI
• Key molecular features
• EGFR and p16 as prognosis biomarkers
• EGFR and p16 as predictive biomarkers
• Microenvironment: immunology
Presentation outline
Leemans R et al, Nature Reviews 2018
HPV-negative genomic alterations
Leemans R et al, Nature Reviews 2011
Amplified in 30%
Inactivated in 90%
Mutated
in 70%
HPV negative
Leemans R et al, Nature Reviews 2011
HPV positive
Leemans R et al, Nature Reviews 2011
Keck et al, Clin Cancer Res 2014
Gene expression profile
Leemans R et al, Nature Reviews 2018
HER family• EGFR amplification/mutation
in 15%• ERBB2 amplification/mutation
in 5%
FGFR pathway• FGFR1 amplification
in 10% HPV negdisease
• FGFR3 mutations in up to 10% HPV pos disease
PI3K pathway• PIK3CA
mutation/amplification in up to 56% HPV positive SCCHN
• PTEN loss in up to 12%
HRAS mutated in 4-5%
Homologours recombination deficiency in HPV+ or in HPV-platinum sensitive disease ?
Actionable genomic alterations
Leemans R et al, Nature Reviews 2011
Amplified in 30%
Inactivated in 90%
Mutated
in 70%
CDK inhibitors:
Palbociclib
LEE011,
LY2835219
HPV negative
0
10
20
30
40
50
60
70
80
90
100
% s
urv
ivin
g
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Years from RT
p16 posp16 neg
HR = 0.36, P = 0.0042-y OS: 74% & 91%
.125.25 .5 1 2 4
Hazard ratio 95% CI
• Key molecular features
• EGFR and p16 as prognosis biomarkers
• EGFR and p16 as predictive biomarkers
• Microenvironment: immunology
Presentation outline
RTOG 0129 TROG 02.02
0
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20
30
40
50
60
70
80
90
100
% s
urv
ivin
g
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Years from RT
p16 posp16 neg
HR = 0.36, P = 0.0042-y OS: 74% & 91%
.125.25 .5 1 2 4
Hazard ratio 95% CI
• The gold standard to detect HPV infection is detection of E6/E7mRNA
• In Situ Hybridization for HPV DNA
• p16 is a good surrogate marker of HPV infection in oropharyngeal cancer:
sensitivity and specificity around 90%
• Diagnosis and prognosis value of p16 outside the oropharynx is controversial
• p16 positivity + HPV PCR DNA
RTOG 0129 TROG 02.02
0
10
20
30
40
50
60
70
80
90
100
% s
urv
ivin
g
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Years from RT
p16 posp16 neg
HR = 0.36, P = 0.0042-y OS: 74% & 91%
.125.25 .5 1 2 4
Hazard ratio 95% CI
Ang KK NEJM 2015Rischin JCO 2010
Survival by HPV or p16 status for oropharyngeal cancer
Carole Fakhry et al. JCO 2014;32:3365-3373
©2014 by American Society of Clinical Oncology
Prognosis: p16 and recurrent disease
19
Locoregional relapse Distant metastases
Salvage surgery No salvage surgery
Fakhry et al. J Clin Oncol 2014
Prognosis: p16 and recurrent disease
Copyright © American Society of Clinical Oncology
Dannenberg, A. J. et al. J Clin Oncol; 23:254-266 2005
Ang, K. K. et al. Cancer Res 2002;62:7350-7356
Copyright ©2002 American Association for Cancer Research
Ang et al. Cancer Res 2002
EGFR expression and prognosis
0
10
20
30
40
50
60
70
80
90
100
% s
urv
ivin
g
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Years from RT
p16 posp16 neg
HR = 0.36, P = 0.0042-y OS: 74% & 91%
.125.25 .5 1 2 4
Hazard ratio 95% CI
• Key molecular features
• EGFR and p16 as prognosis biomarkers
• EGFR and p16 as predictive biomarkers
• Microenvironment: immunology
Presentation outline
Tumor cell cytoplasmic membrane
Monoclonal
AntibodiesCetuximab
Panitumumab
Zalutumumab
Tyrosine kinase
InhibitorsGefitinib (EGFR)
Erlotinib (EGFR)
Lapatinib (EGFR + HER2)
Afatinib, dacomitinib (pan-HER)
Tumor proliferation
EGF receptor
HER1 or EGFR targeting
EGFR overexpression: NO
EGFR polysomy or amplification: NO
RAS mutations Rare in H&N
p16 or HPV ?
Who is going to response ?
Licitra et al, Annals of Oncology 2010
Penuel et al, AACR 2015
Courtesy of A. Pirzkall, Oncology Biomarker development, Genentech
Cetuximab versus MEHD after platinum ?
Months
Cetuximab + RT
(n=211)O
ve
rall
su
rviv
al (%
)
100
80
60
40
20
0
0 10 20 30 40 50 60 70
RT (n=213)29.3 49.0
Hazard ratio = 0.74 (95% CI: 0.57–0.97)
Log-rank p=0.03
Bonner J, et al. N Engl J Med 2006;354:567–578Bonner, Lancet Oncology 2010
Radiotherapy +/- cetuximab: stage 3 and 4
Bonner et al, Lancet Oncology 2011
p16 + : - 3-year LRC rate: 87% vs 65%- HR: 0.31 (95%, CI, 0.11-0.88)
p16 -: - 3-year LRC rate: 31 vs 19%- HR: 0.78 (95% CI, 0.49-1.25)
Rosenthal, J Clin Oncol 2016
p16 as a predictive marker
Study N N Population Benefit
RosenthalASCO 2014
Radiotherapy/cetuximab
Radiotherapy
p16+ = 44; p16- = 109
p16+ = 39; p16- = 120
Stage III/IV p16- : HR: 0.9(0S)
p16+: HR: 0.45
VermorkenAnn Oncol2014
Platin/5-FU/Cetuximab
Platin/5-FU
p16+ = 18; p16- = 178
p16+ = 23; p16- = 162
Recurrent/metastatic: first-line
p16- : HR: 0.82(0S)
p16+: HR: 0.63
Who is going to response ? HPV or p16 no clear answer
Study N N Population Benefit
RosenthalASCO 2014
Radiotherapy/cetuximab
Radiotherapy
p16+ = 44; p16- = 109
p16+ = 39; p16- = 120
Stage III/IV p16- : HR: 0.9(0S)
p16+: HR: 0.45
VermorkenAnn Oncol2014
Platin/5-FU/Cetuximab
Platin/5-FU
p16+ = 18; p16- = 178
p16+ = 23; p16- = 162
Recurrent/metastatic: first-line
p16- : HR: 0.82(0S)
p16+: HR: 0.63
VermorkenLancet Oncol2013
Platin/5-FU/Panitumumab
Platin/5-FU
p16+ = 57; p16- = 179
p16+ = 42; p16- = 165
Recurrent/metastatic first-line
p16- : HR: 0.73(0S)
p16+: HR: 1
MachielsLancet Oncol2015
Afatinib
Methotrexate
p16+ = 31; p16- =141
p16+ = 11; p16- = 42
Recurrent/metastatic second-line
p16- : HR: 0.69(PFS)p16+: HR: 0.95
Who is going to response ? HPV or p16 no clear answer
P P P P P P
EGFR HER-2 HER-3 HER-4
MEHD7945A
Lapatinib
Afatinib Dacomitimib
Study N N Population Benefit
RosenthalASCO 2014
Radiotherapy/cetuximab
Radiotherapy
p16+ = 44; p16- = 109
p16+ = 39; p16- = 120
Stage III/IV p16- : HR: 0.9(0S)
p16+: HR: .45
VermorkenAnn Oncol2014
Platin/5-FU/Cetuximab
Platin/5-FU
p16+ = 18; p16- = 178
p16+ = 23; p16- = 162
Recurrent/metastatic: first-line
p16- : HR: 0.82(0S)
p16+: HR: 0.63
VermorkenLancet Oncol2013
Platin/5-FU/Panitumumab
Platin/5-FU
p16+ = 57; p16- = 179
p16+ = 42; p16- = 165
Recurrent/metastatic first-line
p16- : HR: 0.73(0S)
p16+: HR: 1
MachielsLancet Oncol2015
Afatinib
Methotrexate
p16+ = 31; p16- =141
p16+ = 11; p16- = 42
Recurrent/metastatic second-line
p16- : HR: 0.69(PFS)p16+: HR: 0.95
Who is going to response ? HPV or p16 no clear answerWho is going to response ? HPV or p16 no clear answer
Study N N Population Benefit
RosenthalASCO 2014
Radiotherapy/cetuximab
Radiotherapy
p16+ = 44; p16- = 109
p16+ = 39; p16- = 120
Stage III/IV p16- : HR: 0.9(0S)
p16+: HR: .45
VermorkenAnn Oncol2014
Platin/5-FU/Cetuximab
Platin/5-FU
p16+ = 18; p16- = 178
p16+ = 23; p16- = 162
Recurrent/metastatic: first-line
p16- : HR: 0.82(0S)
p16+: HR: 0.63
VermorkenLancet Oncol2013
Platin/5-FU/Panitumumab
Platin/5-FU
p16+ = 57; p16- = 179
p16+ = 42; p16- = 165
Recurrent/metastatic first-line
p16- : HR: 0.73(0S)
p16+: HR: 1
MachielsLancet Oncol2015
Afatinib
Methotrexate
p16+ = 31; p16- =141
p16+ = 11; p16- = 42
Recurrent/metastatic second-line
p16- : HR: 0.69(PFS)p16+: HR: 0.95
- Very low number of patients in the p16
positive group
- p16 positive group included non-
oropharyngeal sites
- p16 cut-off different in the EXTREME (10%)
Who is going to response ? HPV or p16 no clear answer
0
10
20
30
40
50
60
70
80
90
100
% s
urv
ivin
g
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0Years from RT
p16 posp16 neg
HR = 0.36, P = 0.0042-y OS: 74% & 91%
.125.25 .5 1 2 4
Hazard ratio 95% CI
• Key molecular features
• EGFR and p16 as prognosis biomarkers
• EGFR and p16 as predictive biomarkers
• Microenvironment: immunology
Presentation outline
Courtesy of P. Coulie and S. LucasInstitut de Duve, UCLOUVAIN
Non-synonymous mutations result in amino acid change in a protein that can be recognizedby T-cells
Vogelstein et al. Science 2013
Antigens resulting from mutations
CTL = cytotoxic T cell.
Chen DS, Mellman I. Immunity 2013;39.
Release of cancer
cell antigens
(cancer cell death)
Cancer antigen
presentation
(dendritic cells/APCs)
Priming and activation
(APCs and T cells)
Trafficking of T cells
to tumours
Infiltration of T cells into tumours
(CTLs, endothelial cells)
Recognition of cancer cells
by T cells
(CTLs, cancer cells)
Killing of cancer cells
(immune and cancer cells)
Tumour
Lymph node
Blood vessel
◆ Antitumor T cells are present in patients with cancer prior to any treatment:
blood and tumor
◆ The T cell responses are insufficient
Spontaneous anti-tumor T cell responses exist in cancer
MHC = major histocompatibility complex; TGF-ß = tumor growth factor-ß.
Drake CG, et al. Adv Immunol. 2006;90:51–81; Vesely MD, et al. Annu Rev Immunol. 2011;29:235–271.
Inhibition of tumor antigen presentatione.g. down regulation of MHC I
1
APC
Inhibition of attack by immune cells
e.g. through T-cellcheckpoint pathways
3
Inactive T cell
Secretion ofimmunosuppressive factors
e.g. TGF-ß
2Tumor
cell
Recruitment of immunosuppressive cell typese.g. T-reg
4
ActivatedT cell
Mechanisms to evade or suppress the immune system
MHC TCR
B7 CD28
Activation signals
B7CD28
Antibody
Inhibitory signals
MHCTCR
PD-L1PD-1
Antibody Antibody
Negative signals
TCR = T-cell receptor; PD-L1 = programmed death-ligand 1.
Ribas A. N Engl J Med. 2012;366:2517‒2519.
Priming phase Effector phase
Dendriticcell
T cell
Lymphnode
Peripheraltissue
T cell Tumorcell
CTLA-4
56 29 20 16 14 12 10 9No. at Risk
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14
Time, mo
2.2 months
We have to learn how to fill this gap
Seiwert et al. Lancet Oncology 2016
This is only the beginning
42
42
PD-L1+ immune cells PD-L1+ tumour cells
PD-L1 assessment
43
PD-L1 testing
HR (95% CI) P
Pembro alone 0.61 (0.45-0.83) 0.0007
EXTREME
Median (95% CI)
14.9 mo (11.6-21.5)
10.7 mo (8.8-12.8)
0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0
0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
1 0 0
M o n th s
OS
, %
N o . a t R is k
133 106 85 65 24
122 100 64 42 12
47
22
0
0
11
5
2
0
The benefit is clinically relevant in CPS > 20
45Data cutoff: 29 April, 2016.
Patients with PD-L1 high tumours
0 2 4 6 8 10 12 14 16 18 20 22 24
−100
−50
0
50
100
Ch
ange
fro
m b
asel
ine
(%)
Time (months)
Subjects with confirmed CR/PROther subjectsNew lesion
Patients with PD-L1 low/negative tumours
0 2 4 6 8 10 12 14 16 18 20 22 24
−100
−50
0
50
100
Ch
ange
fro
m b
asel
ine
(%)
Time (months)
Subjects with confirmed CR/PROther subjectsNew lesion
Change in target lesion from baseline by PD-L1
Rizvi et al. Science 2015
Pembrolizumab in NSCLC
Also linked with:- Molecular smoking signature- Mutations in DNA repair mechanisms
THANK YOU !
Jean-pascal.machiels@uclouvain.be
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