HDL plays no role in the pathogenesis of atherosclerosis · HDL plays no role in the pathogenesis...
Transcript of HDL plays no role in the pathogenesis of atherosclerosis · HDL plays no role in the pathogenesis...
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HDL plays no role in the pathogenesis of atherosclerosis
Børge G NordestgaardProfessor, Chief Physician, MD, DMSc
University of Copenhagen & Copenhagen University Hospital
Conflict of Interest DisclosureConsultancies or talks sponsored by AstraZeneca, Merck, Omthera, Sanofi-Aventis,
Regeneron, ISIS Pharmaceuticals, Aegerion, Dezima, Fresenius, B Braun, Kaneka, Pfizer, Amgen, Lilly, Kowa, Denka Seiken
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Rebellious
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Hans Christian Andersen’s fairy tale: The Emperor's New Clothes
HDL
Borge
HDL supportersHDL supporters
”HDL mafia”
”HDL mafia”
Two weavers promise
an Emperor a new suit of
clothes that is invisible to
those who are unfit for their
positions, stupid, or
incompetent.
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The good cholesterol
Low HDL protects againstheart disease
Medical textbooksLay press
Brain washed
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Main focus on LDL cholesterol
• LDL receptor – Goldstein & Brown• Oxidized LDL – Steinberg• Statins – Endo, 4S trial and others• European guidelines – LDL only• American guidelines – LDL mainly
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Next focus on HDL cholesterol• Strong epidemiology – all studies• Animal studies• The ”HDL mafia”• Big Pharma• But then……
HDL-C CVD
2007
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Drug targets based on genetic evidence
LDL-C Lp(a)
HDL-C ? Remnant-C / TG
Nordestgaard Eur Society Cardiology Congress 2011
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Clinical focus on lipoproteins for CVD prevention
1980 1990 20102000
100%
0%
50%
Nordestgaard 2014
2020
LDL
HDL RemnantsTGs
4S trial
EpidemiologyCliniciansTrials”Postprandial”
Epidemiology
Genetics & ”failed” HDL trials
Nobel prize 85 & statins
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Evidence for risk factors causing atherosclerotic disease?
LDL Many otherrisk factors
Epidemiology √ Many studies √
Genetics √ FH + SNPs No
Animal models √ Many models Sometimes
Mechanism √ Understood Speculations
Intervention √ Statin trials No
Nordestgaard 2015
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Randomized trial vs. Mendelian randomizationRandomization methods
Placebo Drug: (lipo)protein levels or
Cardiovascular disease or
Confounders evenly distributed
Random distribution of alleles
Confounders evenly distributed
Cardiovascular disease or
Normal allele
Allele: (lipo)protein levels or
Reverse causation
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HDL
Remnants
LDL
HDL cholesterol
Remnant or VLDL cholesterol
LDL cholesterol
Triglycerides
total cholesterol minus LDL-C minus HDL-C
no direct assay available yet
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< 1 1 – 2 2 – 3 3 – 4 4 – 5 5 2309 6040 3023 1294 527 477 Women Triglycerides, mmol/L < 1 1 – 1.99 2 – 2.99 3 – 3.99 4 – 4.99 5 Triglycerides, mg/dL < 89 89 – 176 177 – 265 266 – 353 354 – 442 443 Observations, No. 4564 7355 2298 652 212 141 Cholesterol, mmol/L (mg/dL) Remnant 0.35 (14) 0.64 (25) 1.08 (42) 1.53 (59) 1.62 (63) 2.33 (90) LDL 2.95 (114) 3.41 (132) 3.64 (141) 3.70 (143) 3.92 (151) 3.54 (137) HDL 2.11 (81) 1.86 (72) 1.57 (61) 1.41 (55) 1.32 (51) 1.13 (44)
Lipoprotein cholesterol, mmol/ L
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
Lipo
prot
ein
chol
este
rol,
mm
ol/L
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
Lipoprotein cholesterol, mg/dL
0
50
100
150
200
250
*** ***
*** *** *** ***
*** ***
*** *** ***
***
***
***
***
*** *** *** ***
***
*** *** *** ***
***
*** *** *** ***
***
Remnant
LDL
HDL
Remnantp < 0.001
LDLp < 0.001
HDLp < 0.001
Trend
N =
Triglycerides(mmol/L)
Men
Copenhagen General Population Study
Freiberg, Nordestgaard 2011
***
***
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Remnants
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Evidence for lipoproteins causing atherosclerotic disease?
LDL TG & Remnants
Epidemiology √ √ Many studies
Genetics √ √ Remnant hyperlipidemia
Animal models √ √ Many models
Mechanism √ √ Similar to LDL
Intervention √ (√) More needed
Nordestgaard 2015
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Copenhagen General Population Study (CGPS)
Copenhagen City Heart Study (CCHS)
N=15,000
N=110,000+
37 yrs follow-up
10 yrs follow-up
No losses to follow-up
1977-2014
Copenhagen
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Nonfasting triglycerides, mmol/L27% 46%
27% 0.1%
Frac
tio
n o
f p
op
ula
tio
n
Reference In extreme groupsNordestgaard & Varbo, Lancet 2014; 384: 626-635
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Nonfasting triglycerides, mmol/L
Copenhagen City Heart Study and Copenhagen General Population Study
Haz
ard
rat
io (
95
%C
I)
Nordestgaard & Varbo, Lancet 2014; 384: 626-635
Myocardial infarctionN = 96,394 (Events = 3,287)
0
1
2
3
4
5
6
1 2 3 4 5 6 7
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Nonfasting triglycerides, mmol/L
Copenhagen City Heart Study and Copenhagen General Population Study
Haz
ard
rat
io (
95
%C
I)
Ischemic Heart DiseaseN = 93,410 (Events = 7,183)
Haz
ard
rat
io (
95
%C
I)
Mainly fasting triglycerides, mmol/L
Emerging Risk Factors Collaboration
JAMA 2009
Coronary Heart DiseaseN = 302,430 (Events = 12,785)
0
1
2
3
4
5
0
1
2
3
4
5
1 2 3 4 5 6 7 1 2 3 4 5 6 7
Nordestgaard & Varbo, Lancet 2014; 384: 626-635
In decilesIn extreme groups
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Nonfasting triglycerides, mmol/L
Copenhagen City Heart Study and Copenhagen General Population Study
Haz
ard
rat
io (
95
%C
I)
Ischemic StrokeN = 97,442 (Events = 2,994)
Haz
ard
rat
io (
95
%C
I)
Mainly fasting triglycerides, mmol/L
Ischemic StrokeN = 173,312 (Events = 2,534)
0
1
2
3
4
5
0
1
2
3
4
5
1 2 3 4 5 6 7 1 2 3 4 5 6 7
Nordestgaard & Varbo, Lancet 2014; 384: 626-635
Emerging Risk Factors Collaboration
JAMA 2009
In quintilesIn extreme groups
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Nonfasting triglycerides, mmol/L
Copenhagen City Heart Study and Copenhagen General Population Study
Haz
ard
rat
io (
95
%C
I)
All-cause mortalityN = 98,515 (Events = 14,547)
0
1
2
3
4
5
1 2 3 4 5 6 7
Nordestgaard & Varbo, Lancet 2014; 384: 626-635
In extreme groups
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Lipoprotein Cardiovascular Disease Risk
Genotype
Mendelian randomization hypotheses
established but causal?
effect size?pleiotropic effects?
statistical power?
1
2 3
Causality: Instrumental Variable Analysis
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Remnant cholesterolmmol/L
HDL cholesterolmmol/L
Hazard ratio for IHD
<0.4 0.4-0.6 0.6-0.7 0.7-1.1
>1.1
>2.0 1.7-2.0 1.4-1.7 1.2-1.4
<1.2
Quintiles
1.0 1.5 2.0 2.5N=57.000CCHS+CGPS
Varbo et al JACC
2013; 61: 427-36
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N=66.000 CCHS+CGPS+CIHDS
Remnant cholesterolPlasma: observational Genetic: causalRemnant / HDL-CPlasma GeneticHDL cholesterolPlasma Genetic
Hazard ratio for IHD per 1mM or1.0 2.0 4.0
15 selected genetic variants
LDL cholesterolPlasma Genetic
12.000 IHD
Varbo et al JACC
2013; 61: 427-36
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N=87.000 CARDIoGRAM
TriglyceridesGenetic unadjusted Genetic LDL+HDL adjust
HDL cholesterolGenetic unadjusted Genetic LDL+TG adjust
Effect size (β) for CAD per 1SD or0 0.3 0.6
Genome wide 185 SNPs
LDL cholesterolGenetic unadjustedGenetic TG+HDL adjust
22.000 CAD
Do et al Nat Genet
2013; 45: 1345-52
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APOC3Jørgensen et alNEJM 2014
01
01
APOC3TG and HDL Working GroupNEJM 2014
PCSK9CGPS & CCHS
0
1
Ischemic vascular disease
N alleles N total N events Risk estimate
75,465 10,770
260 27 0.59
110,472 33,889
498 113 0.60
64,492 10,665
1,697 250 0.90
- 44%
- 39%
- 12%
LDL cholesterol, mmol/L
Triglycerides, mmol/L Hazard ratio (95% CI)
Hazard ratio (95% CI)
0.0 0.5 1.0
0.0 0.5 1.0
0 1 2
0 1 2 3 4
Nordestgaard & Varbo, Lancet 2014; 384: 626-635
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LDL
Remnants
LDL
Remnants
Plasma Intima
Triglycerides
Cholesterol Chylomicron
Inflammation
Macrophage
Foam cells
LPL LPL
FFA +Monoacylglycerol
Nordestgaard & Varbo, Lancet 2014; 384: 626-635
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HDL cholesterol
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Evidence for lipoproteins causing atherosclerotic disease?
LDL TG & Rem-nants
Low HDL
Epidemiology √ √ √
Genetics √ √ None
Animal models √ √ (√)
Mechanism √ √ ?
Intervention √ (√) NoneNordestgaard 2015
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Evidence for lipoproteins causing atherosclerotic disease?
LDL TG & Rem-nants
Low HDL
Epidemiology √ √ √
Genetics √ √ None
Animal models √ √ (√)
Mechanism √ √ ?
Intervention √ (√) NoneNordestgaard 2013
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Reverse cholesterol transport?
HDL +cholesterol
Human evidence?
Evolution?
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Causal factor with variation
Glucose
Longterm monitoring
HgbA1c
TGRemnants
HDL
Nordestgaard et al. Current Drug Targets, 2009, 10, 328-335
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Evidence for lipoproteins causing atherosclerotic disease?
LDL TG & Rem-nants
Low HDL
HDL functionality
Epidemiology √ √ √ None
Genetics √ √ None None
Animal models √ √ (√) None
Mechanism √ √ (√) ?
Intervention √ (√) None None
Present Future The past?
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HDL hypothesis
HDL functionality
Remnant cholesterol
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HDL-C for riskprediction
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SCORE-HDL
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Proportion classified as high CVD mortality risk
Martin Mortensen, Afzal, Nordestgaard, Falk. Eur Heart J 2015; in press
2003-2008: 46092 individuals without CVD, diabetes or statin use6.8 years of follow-up
Copenhagen General Population Study
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Martin Mortensen, Afzal, Nordestgaard, Falk. Eur Heart J 2015; in press
-20
-10
0
10
20
%R
ecla
ssifi
catio
n
Inap
prop
riat
e A
ppro
pria
te
-20
-10
0
10
20
%R
ecla
ssifi
catio
n
Inap
prop
riat
e A
ppro
pria
te
Fatal CVD Myocardial infarctionA C
Cases Non-cases Cases Non-cases
NRI, %
p value
NRI, %
p value
-16 +4 -10 +4
0.002 < 0.0001 < 0.0001 < 0.0001
Combined Combined
-12
0.02 0.006
-5
-20
-10
0
10
20
%R
ecla
ssifi
catio
n
Inap
prop
riat
e A
ppro
pria
te
B
Cases Non-cases
NRI, %
p value
-9 +4
<0.0001 < 0.0001
Combined
-5
<0.0001
Fatal CVD + nonfatal MI or stroke
Reclassification across 5% 10-year risk of fatal CVDUsing SCORE-HDL instead of SCORE
Copenhagen General Population Study
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HDL
LDL
Rem-
nant
”GOOD”
BAD
UGLY
=innocent
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Hans Christian Andersen’s fairytale: The Emperor's New Clothes
HDL
Borge
HDL supportersHDL supporters
”HDL mafia”
”HDL mafia”
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Rebellious