AHA 2017 Residual Inflammatory Risk and Residual Cholesterol Risk:

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AHA 2017 Residual Inflammatory Risk and Residual Cholesterol Risk: Critical Analysis from CANTOS Relationship of CRP Reduction to Cardiovascular Event Reduction Following Treatment with Canakinumab Paul M Ridker MD, Jean MacFadyen BS, Brendan Everett MD, Peter Libby MD, Tom Thuren MD, and Robert Glynn, PhD on behalf of the worldwide investigators and participants in the Canakinumab Anti-Inflammatory Thrombosis Outcomes Study (CANTOS) Embargo lifts Mon., Nov. 13, 9 a.m. PT

Can Inflammation Reduction, in the Absence of Lipid Lowering, Reduce Cardiovascular Event Rates?

From CRP to IL-6 to IL-1: Moving Upstream to Identify novel Targets for Atheroprotection Ridker PM. Circ Res 2016;118:145-156.

Central Illustration. Interleukin (IL)-1 exerts many actions on cells that can contribute to pathogenesis diseases, including atherosclerosis, thrombosis, oncogenesis, and invasion and metastasis of tumors. Many of the effects IL-1 on hepatocytes, including the induction of the acute phase response, depend on the intermediary IL-6, a cytokine potently induced by IL-1. Strong human genetic evidence implicates IL-6 as a causal factor for atherothrombosis. CRP = C-reactive protein. Libby P. Interleukin-1 Beta as a Target for Atherosclerosis: Biologic Basis for CANTOS and Beyond. JACC 2017 (October 31, 2017)

Canakinumab Anti-inflammatory Thrombosis Outcomes Study (CANTOS) Stable CAD (post MI) Residual Inflammatory Risk (hsCRP > 2 mg/L) N = 10,061 39 Countries April 2011 - June 2017 1490 Primary Events Randomized Canakinumab 50 mg SC q 3 months Randomized Canakinumab 150 mg SC q 3 months Randomized Canakinumab 300 mg SC q 3 months Randomized Placebo SC q 3 months Primary Endpoint: Nonfatal MI, Nonfatal Stroke, Cardiovascular Death (MACE) Secondary Endpoint: MACE plus Unstable Angina Requiring Urgent Revascularization (MACE+) Additional Adjudicated Endpoints: Cancer, Infection Ridker PM et al. N Engl J Med. 2017;377:1119-31

CANTOS: Primary Cardiovascular Endpoints Placebo SC q 3 months Canakinumab 150/300 mg SC q 3 months MACE MACE - Plus HR 0.85 95%CI 0.76-0.96 P = 0.007 HR 0.83 95%CI 0.74-0.92 P = 0.0006 Cumulative Incidence (%) Cumulative Incidence (%) 1 2 3 4 5 Follow-up Years Follow-up Years 35 - 40% reductions in hsCRP and IL-6 No change in LDLC Ridker PM et al. N Engl J Med. 2017;377:1119-31

“Residual Cholesterol Risk” “Residual Inflammatory Risk” Addressing the Obverse Side of the Atherosclerosis Prevention Coin Ridker PM. Eur Heart J 2016;37:1720-22 Known Cardiovascular Disease LDL 150 mg/dL hsCRP 4.5mg/L High Intensity Statin “Residual Cholesterol Risk” “Residual Inflammatory Risk” LDL 110 mg/dL hsCRP 1.8 mg/L LDL 70 mg/dL hsCRP 3.8 mg/L Additional LDL Reduction FOURIER/SPIRE PCSK9 Inhibition SC q 2 weeks 15% RRR Additional Inflammation Reduction CANTOS Canakinumab 150-300mg SC q 3 months 15%RRR 7

How Common is Residual Inflammatory Risk? PROVE-IT IMPROVE-IT Residual Inflammatory Risk Residual Cholesterol Risk Both Neither hsCRP > 2 mg/L LDLC < 70 mg/dL hsCRP < 2 mg/L LDLC > 70 mg/dL hsCRP > 2 mg/L LDLC > 70 mg/dL hsCRP < 2 mg/L LDLC < 70 mg/dL Ridker PM. Circulation Res 2017;120:617-9.

CANTOS: Critical Unanswered Clinical Questions Monoclonal Antibodies and the Era of Personalized Medicine Can we predict who benefits the most from effective but expensive treatments? Is there an easily identified clinical subgroup for whom benefits are large and might clearly outweigh hazards? Is there an easily identifiable subgroup where there is evidence not only of reduced MACE, but also of reduced cardiovascular mortality and reduced all-cause mortality? are small and may not justify the hazards? These biologically directed questions have broad implications for patient selection, for cost-effectiveness, for calculations of the number-needed-to-treat (NNT), and ultimately for personalized medicine, allowing us to get the right drug to the right patient, thus maximizing benefits while reducing costs as well as hazards.

CANTOS: Critical Unanswered Clinical Questions Monoclonal Antibodies and the Era of Personalized Medicine. Can we predict who benefits the most from effective but expensive treatments? Two Analytic Approaches Applied to CANTOS: Evaluate whether there are baseline clinical characteristics that can be used to define patient groups more or less likely to benefit from treatment with canakinumab. If not, evaluate whether we can use evidence of biologic drug response to define patient groups more or less likely to benefit from treatment with canakinumab.

CANTOS : Consistency of Effect Across All patient Groups Defined By Baseline Clinical Characteristics MACE MACE Plus Group Women Men Age < 60 yrs Age > 60 yrs Diabetes No diabetes Non Smoker Smoker BMI < 30 kg/m2 BMI > 30 kg/m2 LDLC < 80 mg/dL LDLC > 80 mg/dL hsCRP > 2 to <4 mg/L hsCRP > 4 mg/L HDLC > 45 mg/dL HDLC < 45 mg/dL TG < 150 mg/dL TG > 150 mg/dL Overall 0.5 1.0 0.5 1.0 Canakinumab Superior Canakinumab Inferior Canakinumab Superior Canakinumab Inferior

Interleukin-1b Inhibition with Canakinumab Can we use evidence of individual biologic drug response to define patient groups more or less likely to benefit from treatment with canakinumab? Can we use the magnitude of reduction (or level achieved) of hsCRP or interleukin-6 following treatment with canakinumab to identify individual patients most likely to benefit? Perform a series of sensitivity analyses to address the robustness of any informative findings.

CANTOS: Greater Risk Reduction Among Those With Greater hsCRP Reduction (MACE) Placebo On-treatment hsCRP > 2mg/L On-treatment hsCRP < 2mg/L MACE 25% reduction in risk for those achieving hsCRP < 2 mg/L 5 % reduction in risk for those achieving hsCRP > 2mg/L (No change in LDL cholesterol)

CANTOS Sensitivity Analysis I : Multivariate Adjustment* for Potential Confounding Factors Related to On-Treatment hsCRP Has Minimal Impact On-treatment hsCRP Threshold Placebo Canakinumab On-treatment hsCRP above threshold On-treatment hsCRP below threshold hsCRP < or > clinical cutpoint (2 mg/L) HR (adjusted) 95% CI P 1.0 Referent 0.90 0.79-1.02 0.11 0.75 0.66-0.85 <0.0001 *HRs adjusted for age, gender, smoking, HTN, diabetes, BMI, baseline hsCRP, Baseline LDLC

CANTOS Sensitivity Analysis II : Choice of Alternative Thresholds for On-treatment hsCRP Has Minimal Impact On-treatment hsCRP Threshold Placebo Canakinumab On-treatment hsCRP above threshold On-treatment hsCRP below threshold hsCRP < or > clinical cutpoint (2 mg/L) HR (adjusted) 95% CI P 1.0 Referent 0.90 0.79-1.02 0.11 0.75 0.66-0.85 <0.0001 hsCRP < or > median (1.8 mg/L) 0.10 0.73 0.64-0.84 hsCRP > or < 50 % reduction 0.87 0.76-1.00 0.05 0.81 0.71-0.91 0.0008 Median % reduction 0.86 0.75-0.98 0.02 0.80 0.70-0.92 0.001 HRs adjusted for age, gender, smoking, HTN, diabetes, BMI, baseline hsCRP, Baseline LDLC

CANTOS Sensitivity Analysis III CANTOS Sensitivity Analysis III. Cardiovascular Outcomes According to On-treatment Tertiles of hsCRP Measured After the Initial dose of Canakinumab (MACE) Placebo Tertile 1 (hsCRP>2.6mg/L) Tertile 2 (hsCRP >1.2-<2.6mg/L) Tertile 3 (hsCRP <1.2mg/L) MACE 29% reduction for those achieving lowest hsCRP tertile 17 % reduction for those achieving middle hsCRP tertile 1 % reduction for those achieving highest hsCRP tertile (No change in LDL cholesterol)

Additional Pre-Specified Cardiovascular Outcomes CANTOS Sensitivity Analysis V: Multivariable Adjusted Hazard Ratios for Additional Pre-Specified Cardiovascular Outcomes According to On-treatment hsCRP Levels Above or Below 2 mg/L After Drug Initiation Clinical Outcome Placebo (N = 3182) Canakinumab On-treatment hsCRP > 2mg/L (N = 2868) On-treatment hsCRP < 2 mg/L (N = 3484) MACE HR (adjusted) 95% CI P 1.0 Referent 0.90 0.79-1.02 0.11 0.75 0.66-0.85 <0.0001 MACE - Plus 0.91 0.81-1.03 0.14 0.74 0.66-0.83 CV Death 0.99 0.82-1.21 0.95 0.69 0.56-0.85 0.0004 All-Cause Mortality 1.05 0.90-1.22 0.56 0.58-0.81 HRs adjusted for age, gender, smoking, HTN, diabetes, BMI, baseline hsCRP, Baseline LDLC

CANTOS Sensitivity Analysis VI: Consistent Effects at All Doses of Canakinumab (MACE) Placebo On-treatment hsCRP > 2mg/L On-treatment hsCRP < 2 mg/L 50 mg SC q 3 months HR (adjusted) 95% CI P 1.0 Referent 0.96 0.80-1.14 0.63 0.78 0.63-0.96 0.02 150 mg SC 0.86 0.71-1.04 0.11 0.75 0.62-0.91 0.003 300 mg SC 0.87 0.71-1.07 0.18 0.74 0.62-0.88 0.0009 HRs adjusted for age, gender, smoking, HTN, diabetes, BMI, baseline hsCRP, Baseline LDLC The proportions of those treated who achieved hsCRP levels < 2 mg/L were 44%, 55%, and 65% in the 50mg, 150mg, and 300mg canakinumab groups, respectively.

CANTOS Sensitivity Analysis VII: Similar Results Observed in a Causal Inference Analysis Which Modelled Potential Outcomes Using Baseline Covariates for Individual Patients Treated With Canakinumab Had They Counterfactually Been Allocated to Placebo (and then Comparing the Modelled Effects to the Observed Effects) Canakinumab Dose On-treatment hsCRP > 2mg/L On-treatment hsCRP < 2 mg/L 150 mg SC q 3 months HR (counterfactually modelled) 95% CI 0.90 0.75-1.07 0.76 0.64-0.91 300 mg SC 0.93 0.74-1.04 0.80 0.69-0.96

CANTOS: Additional Non-Cardiovascular Clinical Benefits Incident Lung Cancer HR (95%CI) P 1.0 (referent) (referent) 0.77 (0.49-1.20) 0.25 0.61 (0.39-0.97) 0.034 0.33 (0.18-0.59) 0.00008 Placebo Canakinumab 50 mg Canakinumab 150 mg Canakinumab 300 mg P-trend across groups = 0.0003 0.0 1.0 2.0 3.0 Cumulative Incidence (%) 1 2 3 4 5 Follow-up Years Ridker PM et al. Lancet. 2017;390:1833-1842

CANTOS: Greater Risk Reduction for Incident Lung Cancer With Greater hsCRP Reduction 71% reduction for those achieving hsCRP below median No significant benefit for those achieving hsCRP above median Placebo On-treatment hsCRP Above Median On-treatment hsCRP below median

CANTOS : Adverse Effects Incidence Rates of Fatal Infection are Not Related to On-Treatment Levels of hsCRP Clinical Outcome Placebo (N = 3182) Canakinumab On-treatment hsCRP > 2mg/L (N = 2868) On-treatment hsCRP < 2 mg/L (N = 3484) Fatal Infection Incidence rate (per 100 person years) 0.18 0.35 0.27

Conclusions: The Canakinumab Anti-Inflammatory Thrombosis Outcomes Study (CANTOS) Overall, CANTOS demonstrates that targeting the IL-1b to IL-6 pathway of innate immunity with canakinumab reduces cardiovascular event rates and potentially reduces rates of incident lung cancer and lung cancer mortality. CANTOS thus provides critical proof-of-concept that inflammation inhibition, in the absence of lipid lowering, can improve atherothrombotic outcomes. It has been uncertain, however, if there are patient groups where the benefits of treatment clearly outweigh potential hazards. The current analysis suggests that the magnitude of hsCRP reduction following a single dose of canakinumab may provide a simple clinical method to identify individuals most likely to accrue the largest cardiovascular and cancer benefits from continued treatment.

Conclusions: The Canakinumab Anti-Inflammatory Thrombosis Outcomes Study (CANTOS) For example, among those who achieved levels of hsCRP <2mg/L after a single dose of canakinumab, continued long-term treatment was associated with a 25% reduction in MACE (P<0.0001), a 31% reduction in cardiovascular mortality (P=0.0004) and a 31% reduction in all-cause mortality (P<0.0001). By contrast, effects were smaller in magnitude and non-significant for all of these endpoints among those with a less profound inflammatory response. The differential outcomes observed in CANTOS on the basis of achieved hsCRP concentration were robust to the choice of on-treatment measures, were minimally affected by adjustment for baseline clinical characteristics, were observed at all individual canakinumab doses, and were consistent in causal inference analyses.

Conclusions: The Canakinumab Anti-Inflammatory Thrombosis Outcomes Study (CANTOS) We believe these observations have clinical importance not only for the pathophysiology of inflammation and future drug development, but also for patient selection, cost-effectiveness, and personalized medicine. For example, the 5-year number-needed-to-treat (NNT) for the endpoint of myocardial infarction, stroke, coronary revascularization, or death from any cause was 16 among those with on-treatment concentrations of hsCRP <2mg/L. By contrast, the 5-year NNT was 57 for those treated with canakinumab who did not achieve this inflammation threshold. The main hazard of canakinumab – a small but statistically significant increase in fatal infection – was not related to on-treatment hsCRP levels. As such, the use of biologic response to canakinumab may also provide a simple selection tool to maximize benefit without increasing clinical hazard. Details of the CANTOS hsCRP reduction data are available on-line today at The Lancet.org.