new treatments in sepsis - bvikm - home symposium/29th... · corticus • international,...
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New treatments in sepsis
Wouter Meersseman, MDUniversity Hospital Gasthuisberg
Medical Intensive Care Leuven
16 Nov ’07, Oud Sint-Jan, Brugge
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Sepsis on European ICU’s
• Overall, 64% of 3147 patients received antibiotics• Sepsis identified in 37% patients
– 60% culture positive– Gram positive 40%– Gram negative 38%– C albicans 13%
• Commonest sites of infection:– Lung 68%– Abdomen 22%– Blood 20%– UTI 14%
Vincent et al, Crit Care Med 2006 34:344
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Death from sepsis on European ICU’s
Vincent et al, Crit Care Med 2006 34:344
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Clinical trials in sepsis……
……The last five years….
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Inflammatory cascade
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Coagulation cascade
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35
30
25
20
15
10
5
0
30.8%
24.7%
Placebo
(n-840)
Drotrecoginalfa
(activated) (n=850)
Mo
rtal
ity
( %)
6.1% absolute reduction in
mortality
Results: 28-Day All-Cause MortalityPrimary analysis results
2-sided p-value 0.005Adjusted relative risk reduction 19.4%Increase in odds of survival 38.1%
Bernard GR, et al. Efficacy and safety of recombinant human activated protein C for severe sepsis. N Engl J Med 2001; 344:699-709
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Mortality and APACHE II Quartile
APACHE II Quartile*Numbers above bars indicate total deaths
05
10
15
20
25
30
35
40
45
50
1st (3-19) 2nd (20-24) 3rd (25-29) 4th (30-53)
PlaceboDrotrecogin
Mo
rtal
i ty
(per
cen
t )
26:33
57:49
58:48
118:80
Bernard GR. Drotrecogin alfa for the treatment of severe sepsis. Crit Care Med2003; 31[Suppl.]:S85-S90
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Drotrecogin alpha (activated) is not effective in adults with severe sepsis and a low risk of death*,
and is associated with an increased rate of serious bleeding
Abraham et al, NEJM 2005 353: 1332. ADDRESS trial group
* APACHE II < 25 orSingle organ failure
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Glucocorticoids in acutely ill patients
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Adrenal responsiveness to 250 µg ACTH
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Effect of steroids on 28 day mortality
Favours treatment Favours control
RR 0.88 (0.78 to 0.99) p = 0.03
Annane et al, BMJ 2004 329:480
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Effect of steroids on shock reversal
Favours treatmentFavours control
RR 1.6 (1.27 to 2.03) p < 0.0001
Annane et al, BMJ 2004 329:480
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Controversies remain...
• Differences related to dosages
• Optimal definition of adrenal insufficiency
• Etomidate bolus depresses adrenal function
• No free cortisol routinely measured
• What about fludrocortisone?
In the meantime: probably useful to administer 200 mg hydrocortisone/day (for a maximum of 7 days) in vasopressor dependent septic shock
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CORTICUS
• International, prospective double-blind RCT of hydrocortisone in patients with moderate – severe septic shock
• HC 50 mg q6h for 5 d then tapering to d 11. No fludrocortisone.
• Primary EP 28 d mortality in nonresponders
• Approx 500 patients enrolled, study closed Nov 2005
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CORTICUS - Results
• No effect on 28 day mortality in wholepopulation or pre-identified subgroups
• Did not reverse shock in wholepopulation or pre-identified subgroups
• Did reduce the time to shock reversal
• No significant problem with super-infection
Sprung et al., N Eng J Med 2007 (in press)
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Intensive insulin therapy in critically ill patients
Van den Berghe G et al, NEJM 2001 345:1359
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Intensive insulin therapy in medical patients on ICU for > 3 days
ICU mortality
In hospitalmortality
ARR (%) OR (95% CI) P value
38.1--- 31.3Δ 6.8%
52.5 --- 43.0Δ 9.5%
0.69 (0.50-0.95) 0.02
0.63 (0.46-0.89) 0.003
OR and p value corrected for type & severity of illness
Van den Berghe G et al, N Engl J Med 2006 354:449
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Yet more clinical trials in sepsis……
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Modlin & Cheng, Nature Med 2004 10:1173
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TAK-242
• Novel small molecule signal transduction
inhibitor
• Effective when given up to 4 h after LPS
challenge in mice
• Phase I human studies confirm broad
inhibition of cytokines
• Excellent safety profile
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Putative target site of TAK-242
TLR4
MyD88
MD-2
LPS PGN
TLR2
IRAK
TRAF6
NF-kB
TAK-242
CD
14
( MyD88-dependent )
IRF3
( MyD88-independent )
IFN-inducible genes expression Cytokines production
Trif
Mal/TIRAPTRAM
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TAK-242 exhibits a TLR4-specific mode of action
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Phase II study of Eritoran (E5564) in sepsis
Placebo
Low dose
High dose
28 d mortality (%) RRR (%) p
33.3
32.0
26.9 6.4 0.34
N = 293
Eisai, press release, Aug 2005
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Ulloa et al, PNAS 2002; 99:12351
Ethyl pyruvate prevents lethal CLP sepsis in miceby reducing HMG-B1
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The interaction of endotoxin (LPS) with host cells
LPS
LPS
LPS
Monocyte/macrophage
CD14
LBP
Soluble CD14
Bacteria
Endothelial cell
Toll-likereceptorLPS
LPS
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Total cholesterol concentration and outcome in
111 ICU patients
1320
59 61
49
31 33
0
20
40
60
80
100
Died Infected afteradmission
LOS > 2days MOD Score>1
Inc
ide
nc
e r
ate
(%
)Very Low cholesterol <120mg/dl (N=56)Low cholesterol >120mg/dl (N=55)
Gordon et al. Crit Care Med.
LOS = Length of ICU StayMOD = Multiple Organ Dysfunction
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Hypothesis: linking lipid levels, cytokines, and clinical outcome
Poor Clinical Outcome
LPSInflammatoryCytokines
DecreasedLPS
Neutralization
Infection orHypoperfusion and
Bacterial Translocation
Tissue Damage:Surgery, Trauma
Sepsis
Low LipidLevels
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GR270773 Lipid Emulsion
Endotoxin
Emulsion
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Drenth J and van der Meer J. N Engl J Med 2006;355:730-732
“Inflammasomes catapult cryopyrin from involvement in a rather obscure group of disorders into therealm of common bacterial infections”
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A role for statins in sepsis?
• Pleiotropic anti-inflammatory effects
• Prevent lethal sepsis in mice used either as prophylaxis or therapy
(Merx, Circulation 2005 112:117)(Merx, Circulation 2005 112:117)
• Beneficial in human LPS-challenge model
(Steiner, Circulation 2005 111:1841)(Steiner, Circulation 2005 111:1841)
• Clinical observational studies suggest statins reduce risk of complications/death in pts admitted with sepsis
((AlmogAlmog, Circulation 2004 110:880), Circulation 2004 110:880)
(Kruger, Intensive Care Med 2006 32:75)(Kruger, Intensive Care Med 2006 32:75)
• Statins reduce the risk of developing sepsis after cardio-
vascular event
((HackamHackam, Lancet 2006 367:413), Lancet 2006 367:413)
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Statins do not protect against CAPAn example of the “healthy user” effect?
Statin use
YES NO OR p
Death (%)
ICU admission (%)
Death or ICUAdmission (%)
Univariate analysisn = 3415
Multivariate analysis
Death or ICUAdmission (%)
8 10 0.75 0.18
9 10 0.84 0.39
15 19 0.8 0.15
1.1 0.61
Majumdar et al, BMJ 2006 333:999
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So what’s going on here?
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The 1992 ACCP/SCCM Consensusdefinitions for Sepsis and Organ Failure
• Infection: microbial phenomenon characterised by an inflammatory response to the presence of micro organisms or the invasion of normally sterile host tissue by these organisms.
• Sepsis: systemic response to infection manifested by ≥ 2 of:– Temp > 38oC or < 36oC
– HR > 90 bpm
– RR > 20 bpm or PaCO2 < 32 mmHg
– WBC > 12 x 109/L, < 4 x 109/L or >10% band forms
Bone et al, Chest 1992 101:1644
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Because there is no common definition for sepsis, how likely is it that the diagnosis of sepsis is being missed? Is
it...
17%
27%
51%
2%
0%
3%
0%
1%
16%
51%
29%
3%Extremely likely
Very likely
Somewhat likely
Not very likely
Not likely at all
Not sure
Total (n=497) Intensive Care Physicians (n=237)
Ramsay, Crit Care 2004 8:R409.
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“Eligible patients had known or suspected infections,…had ≥ 3 signs of systemic inflammation, and had ≥ 1 sepsis-associated acute organ dysfunction”
Systemic host responses in Severe Sepsisanalyzed by causative microorganism and
treatment effects of drotrecogin alfaOpal et al; Clin Infect Dis 2003 37:50-8
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Glucocorticoid insufficiency in patients who presentto the hospital with Severe Sepsis: a
prospective clinical trialManglik et al, Crit Care Med 2003 31:1668-75
“Severe sepsis was defined as sepsis with organ dysfunction, inadequate perfusion, or hypotension.Abnormalities could include, but were not limited to,lactic acidosis, oliguria, and/or acute mental status.
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INDICATIONS AND USAGE Xigris is indicated for the reduction of mortality in adult patients with severe sepsis (sepsis associated with acute organ dysfunction) who have a high risk of death (e.g., as determined by APACHE II, see CLINICAL STUDIES). Efficacy has not been established in adult patients with severe sepsis and lower risk of death. Safety and efficacy have not been established in pediatric patients with severe sepsis.
Xigris™ product label, FDA website
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2001 SCCM/ESICM/ACCPATS/SIS International SepsisDefinitions Conference
Levy MM et al, Crit Care Med 200331:1250 - 1256
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2001 SCCM/ESICM/ACCPATS/SIS International Sepsis Definitions ConferenceDiagnostic criteria for sepsis (selected)
• Infection, & some of the following:
• Temp > 38.3 or < 36
• HR > 90
• Tachypnea
• Altered mental status
• Pos fluid balance
• Hyperglycaemia
• WBC > 12 x109/L,<4 x109/L
• CRP or PCT > 2 SD
• Hypotension
• Hypoxaemia
• Acute oliguria
• Raised creatinine
• Coagulopathy
• Ileus
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Putative markers of sepsis
• Microbial products– LPS; Bacterial DNA
• Physiological– T; HR; RR; CI; Urine
• Cell surface markers– CD40; CD11b; CD64
• Soluble receptors– IL-2R; sELAM-1;
sTNFR; sCD14 etc
• Cytokines– IL-1; Il-1ra; IL-6; IL-8;
IL-10; TNF; HMG-1 etc
• Acute phase proteins– CRP; LBP; Fibrinogen
• Coagulation factors– FDPs; PAI-1; TPA etc
• Various– PCT; Lactate;
Elastase etc
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Can we do better? The elusive marker of sepsis
“More than 80 putative markers of sepsis have beendescribed. All correlate with mortality (but none are useful) in stratifying patients with respect to diagnosisor response to therapy. Their limitations arise from thechallenges of establishing causality in a complex process like sepsis, and of stratifying patients into morehomogeneous populations”.
Measures, markers and mediators: Towards a staging system for clinical sepsis. A Report of the 5th Toronto Round Table. Marshall JC et al, Crit Care Med 2003 31:1560
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Is this disease…..
really the same asthis disease?
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NoNo
YesYes
Lung Lung
Site of Site of infectioninfection
AbdomenAbdomen
BloodBlood
Urinary Urinary tracttract
Biological Biological testtest
Severity Severity testtest
NegNeg..
PosPos..
InfectionInfection
NegNeg..
PosPos.. ClinicalClinicalTrialTrial
PatientPatientatat
riskrisketc
Figure 2
Cohen et al, Crit Care Med 2001 29:880-886
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Some provocative conclusions..
• Sepsis is an important clinical syndrome that is associated with a significant morbidity and mortality, but…..
• We can’t define it
• We can’t agree how to recognise it at the bedside
• We can’t agree on a test(s) to detect it
So what should we do….?
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• Retain “sepsis” as a clinical term but abandon
the idea of developing a single “anti-sepsis” drug
• Focus instead on specific infectious diseases
• Continue to explore pathophysiology to identify
new targets, but for defined settings
• Go for incremental improvement rather than the
big bang – the cancer model