diabetocardiology: a new specialty eugene braunwald, m.d. israel heart society jerusalem april 22,...
TRANSCRIPT
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DIABETOCARDIOLOGY:A New Specialty
Eugene Braunwald, M.D.
Israel Heart SocietyJerusalem
April 22, 2013
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DisclosuresResearch Support for Clinical Trials
Squibb SAVE, CARE
Bristol Myers Squibb PROVE IT (TIMI 22) SAVOR (TIMI 53)
Astra Zeneca SAVOR (TIMI 53)
Lilly/Daiichi Sankyo TRITON (TIMI 38) ENGAGE (TIMI 48)
Johnson & Johnson ATLAS 2 (TIMI 51)
GSK SOLID (TIMI 52)
Merck TRA-2P (TIMI 50) REVEAL (TIMI 55)
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Non DM + STEMI DM+ STEMINon DM + UA/NSTEMI DM + UA/NSTEMI
1 YEAR MORTALITY AFTER ACSM
ort
alit
y (%
)
13.2%
Days
0 30 90 180 270 360
UA/NSTEMI
STEMI
14
12
10
8
6
4
2
P interaction DM x ACS = 0.004
8.1% 7.2%
3.1%
diabetic
diabetic
Donahoe SM et al. JAMA 2007;298:765
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2004;350:1495
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ALL-CAUSE DEATH, NON-FATAL MI, OR URGENT REVASCULARIZATION
Time after entry to trial (days)
Dea
th,
MI,
Urg
ent
Rev
asc
0 5 10 15 20 25 30
0.0
0.01
0.02
0.03
0.04
Pravastatin
Atorvastatin
33% RRp = .043
Ray KK, Cannon CP, Braunwald E et al. JACC 2005;46:1405
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Eur Heart J 2006;27:2323
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Ahmed S et al.Eur Heart J 2006;27:2323
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Adhesion1
Platelets
Lipidcore
CollagenGP la/lla bind
von WillebrandFactor/GP lb bind
Activation2
Thrombin
ADP
5 HT
TXA2 Aggregation3
Fibrinogen
ActivatedGP llb/llla
Handin RI. Harrison’s Principles of Internal Medicine. Vol 1. 14th ed. NY, NY: McGraw-Hill; 1998:339.
Schafer AI. Am J Med. 1996;101:199-209.
PLATELET CASCADE IN THROMBUS FORMATION
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Ann Intern Med 1975;82:733
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RESPONSE OF NORMAL AND DIABETIC PLATELET-RICH PLASMA TO ADENOSINE
Sagel J et al.Ann Int Med 1975;82:733
% A
ggre
gatio
n
Minutes
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ASA INHIBITION OF ARACHIDONIC ACID-INDUCED PLATELET AGGREGATION
Watala C et alThrombosis Res 2004;113:101
ASA concentration [mg/ml]
ControlsDM
Inhi
bitio
n [%
]
0
0 10 20 30 40 50 60 70 80 90 100
10
40
30
20
60
50
70
80
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N Engl J Med 2007;357:2001
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0
5
10
15
0 30 60 90 180 270 360 450
HR 0.81(0.73-0.90)P=0.0004
Prasugrel
Clopidogrel
Days
En
dp
oin
t (%
)
12.1
9.9
HR 1.32(1.03-1.68)
P=0.03
Prasugrel
Clopidogrel1.82.4
138 events
35 events
Balance of Efficacy and Safety
CV Death / MI / Stroke
TIMI Major NonCABG Bleeds
NNT = 46
NNH = 167
Wiviott SD et al. NEJM 2007;357: 2001
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Myocardial Infarction
DM No DM
0
0.03
0.06
0.09
0.12
0.15
0 100 200 300 400 500
No DM Clopidogrel
No DMPrasugrel0
0.03
0.06
0.09
0.12
0.15
0 100 200 300 400 500
DM Clopidogrel
DM Prasugrel
13.2
8.2
HR 0.60 (0.48-0.76), <0.001n=3146
8.77.2
HR 0.82 (0.72-0.985, 0.006n=10,467
P interaction = 0.02
%
0
3
6
9
15
12
%
0
3
6
9
15
12
0 100 200 300 400 500
Days
0 100 200 300 400 500
Days
clopidogrel prasugrel
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DM on Insulin n=776
DM No Insulin n=2340
No DM n=10,462
0.3 1 2
Pras Clop
9.2% 10.6%
11.5% 15.3%
14.3% 22.2%
Prasugrel Better Clopidogrel Better
Reduction in Risk
14%
26%
37%
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Late INa is increased by (in)Hypoxia Ischemic metabolites
O2 reactive species Heart failurePost-MI remodelled myocytes
IONIC DISTURBANCES IN ISCHEMIA AND HEART FAILURE AND THEIR CONSEQUENCES
ATP Hydrolysis
Cell Injury
Na+ Overload
Ischemia Heart Failure
Reverse Na+/Ca2+X
Ca2+ Overload
1. Electrical Arrhythmias
2. Mechanical Abn. Contractility
diastolic tension (-) force-freq. relation
Dysfunction
Late INa
Ranolazine
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Assessment of Anti-anginal Effects
RANOLAZINE(N=3,279)
ResultsResults
PLACEBO(N=3,281)
*KM Cumulative Incidence at 12 months
5.9
4.2
0
1
2
3
4
5
6
7
8
Worsening Angina (%)*
23% P = 0.023
12.2
10
0
2
4
6
8
10
12
14
16
Antianginal Increase (%)*
19% P = 0.006% %
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Circulation 2009;119:2032
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MERLIN-TIMI 36: CHANGE IN HbA1c (%) STRATIFIED BY DIABETES STATUS
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0 4 8 12 16
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0 4 8 12 16
Month of Follow-up
Patients with Diabetes Mellitus
Month of Follow-up
No Diabetes Mellitus
M4
N = 707RanolazineN = 770Placebo
M8
N = 535N = 598
M16
N = 112N = 122
<0.001P-value <0.001 = 0.16
M4
N = 1401N = 1428
M8
N = 1113N = 1113
M16
N = 266N = 260
<0.001 = 0.002 = 0.03
-0.64
-0.12
LS Mean baseline (Ran) 7.5% LS Mean baseline (Ran) 5.6%
Morrow DA et al. Circulation. 2009;119:2032-39.
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Persistent Dilemmas in Diabetes Therapy
• Many studies have demonstrated that improved glucose control reduces microvascular (eg, retinal, renal, neuropathic) complications.
• However, no glucose lowering regimen, let alone a particular agent, has definitively been shown to reduce macrovascular complications (eg, MI, stroke, angina)
• In fact, several agents are suspected to worsen CV outcomes (e.g., sulfonylureas, rosiglitazone, insulin)
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TRIALS OF INTENSIVE GLYCEMIC CONTROL AND CV DISEASE
MACE MORTALITY
ACCORDn = 10,251HbA1c 7.5/6.4
0.90 1.22*
ADVANCEn = 11,140HbA1c 7.3/6.5
0.94 0.93
VADTn = 1791HbA1c 8.4/6.9
0.88 1.07
n = 23,182Monami M et al.Diabetes Obes Metab 2013;15:112
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Diabetes Therapy and CV RiskCombination of SUs and Metformin may be Linked to
Higher Risk for CVD and All-cause Mortality*
CI=confidence interval; CVD=cardiovascular disease; met=metformin; NS=not specified; SU=sulfonylureas*Composite end point of CVD hospitalizations or CVD mortality – only statistically significantly increased end point.Rao A, et al. Diabetes Care. 2008; 31: 1672–1678.
Meta-analysis data from 9 clinical studies
1.04
1.86
0.96
1.38
2.24
1.86
1.52
1.43
(0.62, 1.75)
(1.33, 2.61)
(0.82, 1.12)
(1.13, 1.69)
(1.26, 3.99)
(1.03, 3.35)
(0.84, 2.76)
(1.10, 1.85)
SU combo with metbetter than comparators
SU combo with metworse than comparators
Relative risk(95% CI)
Risk ratios for composite end point of CVD hospitalizations or CVD mortality*
0.25 1.00 4.00
Source study reference
Bruno (1999)
Olsson (2000)
Johnson (2005)
Koro (2005)
Evans (2006a)
Evans (2006b)
Evans (2006c)
Overall
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Concerns About the Safety of Diabetic Therapy
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Regulatory Obligations for All New Diabetes Medications – 2008
A Two Step Process
Step 1 - Initial Approval• Show effective HbA1c reduction• Exclude excess risk in Phase II/III
– More patients in Phase II/III– Higher risk population (CVD, CKD)– Longer follow-up (minimum 2-years)– Pre-defined CV endpoints with independent blind adjudication– Statistical plan to perform meta-analysis of CV events in Phase
II/III program
An upper-bound of 95%CI <1.8 “supports approval”
http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/ucm071627.pdf
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Regulatory Obligations for all New Diabetes Medications - 2008
Step 2 - Post-marketing Obligation“…a post-marketing trial generally will be necessary to definitively show that the upper bound of the two-sided 95 percent CI for the estimated risk ratio is less than 1.3.
This can be achieved by conducting a single trial that is adequately powered or by combining the results from a premarketing safety trial with a similarly designed post-marketing safety trial. This clinical trial will be a required post-marketing safety trial.”
http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/ucm071627.pdf
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GLP-1 Effects in Humans
Adapted from Flint A, et al. J Clin Invest. 1998;101:515-520Adapted from Larsson H, et al. Acta Physiol Scand. 1997;160:413-422Adapted from Nauck MA, et al. Diabetologia. 1996;39:1546-1553Adapted from Drucker DJ. Diabetes. 1998;47:159-169
Delayed gastric emptying
Decreases appetite
Reduced hepatic glucose
productionIncreased insulin
secretion
Reduces glucagon secretion
GLP-1/ GIP secreted upon the ingestion of
food
Beta-cellworkload
Beta-cellresponse
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How DPP4 Inhibitors Work
FoodIntake
Stomach
GI Tract
Intestine
Alpha-cells
Pancreas
Insulin Release
Net Effect:
Blood Glucose
Beta-cells
GLP-1 / GIP Effects on β-cells:
DPP4Inhibitor
GLP-1 Effect on α-cells:
Glucagon secretion
Adapted from Drucker and Nauck, 2006; Idris and Donnelly, 2007; Barnett, 2006
Incretins
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TIMI STUDY GROUP / HADASSAH MEDICAL ORG
SAXAGLIPTIN2.5 or 5 mg/d
PLACEBO
Follow up visitsQ6 months
Final Visit
Documented Type 2 Diabetes
N =16,500
Primary EP CV Death, MI,
Ischemic Stroke
Primary EP CV Death, MI,
Ischemic StrokeDuration
Event driven (n=1040)Estimated time ~ 5 yr
Established CV Disease or Multiple Risk Factors
Major Secondary EP: CV death, MI, stroke, or hospitalization for heart failure, unstable angina pectoris, or coronary revascularization
Follow-upEstimated time ~ 3 yr
RANDOMIZE 1:1 DOUBLE BLIND
Dosing based on eGFR
All other DM Rx per treating MD
Saxagliptin Assessment of Vascular Outcomes Recorded in Patients with
Diabetes Mellitus-TIMI 53
ClinicalTrials.gov Identifier: NCT01107886
Start Date• May 2010
Estimated Study Completion Date• June 2014
Scirica BM et al., Am Heart J. 2011;162(5):818-825
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TIMI STUDY GROUP / HADASSAH MEDICAL ORG
SITAGLIPTIN PLACEBO
Final Visit
Documented Type 2 Diabetes
N ~14,000
Primary EP CV death, MI,
ischemic stroke, UA requiring revascularization
Primary EP CV death, MI,
ischemic stroke, UA requiring revascularization
Stable, Established CV dDsease; HbA1c 6.5-8.0%
Secondary EPs: CV death, MI, stroke; all cause mortality; heart failure; change in renal function
Rx with metformin, pioglitazone, SU, sulfonylurea,
Insulin
Trial Evaluating Cardiovascular Outcomes With Sitagliptin
Start Date• Dec 2008
Estimated Study Completion Date• Dec 2014
ClinicalTrials.gov Identifier: NCT00790205
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Diabetes Obes Metab 2013;15:112
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• 70 trials• 41,959 patients• 41,307 patient years
MACE = CV death, non-fatal MI,
stroke, ACS
DDP4 INHIBITOR META-ANALYSIS
Monami M et al.Diabetes Obes Metab 2013;15:112
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DDP4i META-ANALYSIS
.4 .5 .6 .7 .8 .9 1.0 1.1 1.2 1.3
O.R.
MACE
AMI
STROKE
MORTAL.
CV DEATH
p
0.001
0.023
0.29
0.008
0.14
DPP4i better Placebo better
Monami M et al.Diabetes Obes Metab 2013;15:112
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SGLT2 Inhibition
Proximal tubule
SGLT2 SGLT1
S1
S3
Glomerulus Distal tubule
Loop of Henle
Col lect ing duct
Glucosefiltration
Reduced glucosereabsorption
Increasedglucose
excretionSGLT2
inhibition
Wright, EM. Am J Physiol Renal Physiol. 2001;280:F10–8; Lee ,YJ et al. Kidney Int Suppl. 2007;106:S27–35, Han S. Diabetes 2008;57:1723–1729.
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Coronary
Heart
Disease
Diabetes
Mellitus
Cardiologist Diabetologist
20th CENTURY MODEL
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Coronary
Heart
Disease
Diabetes
Mellitus
21st CENTURY MODEL
Diabetocardiologist