Petersen, A.-K. ; Stark, K.* ; Musameh, M.D.* ; Nelson, C.P.* ; Römisch-Margl, W. ; Kremer, W.* ; Raffler, J. ; Krug, S.* ; Skurk, T.* ; Rist, M.J.* ; Daniel, H.* ; Hauner, H.* ; Adamski, J. ; Tomaszewski, M.* ; Döring, A. ; Peters, A. ; Wichmann, H.-E. ; Kaess, B.M.* ; Kalbitzer, H.R.* ; Huber, F.* ; Pfahlert, V.* ; Samani, N.J.* ; Kronenberg, F.* ; Dieplinger, H.* ; Illig, T. ; Hengstenberg, C.* ; Suhre, K. ; Gieger, C. ; Kastenmüller, G.
     
    
        
Genetic associations with lipoprotein subfractions provide information on their biological nature.
    
    
        
    
    
        
        Hum. Mol. Genet. 21, 1433-1443 (2012)
    
    
    
      
      
	
	    Adverse levels of lipoproteins are highly heritable and constitute risk factors for cardiovascular outcomes. Hitherto, genome-wide association studies revealed 95 lipid-associated loci. However, due to the small effect sizes of these associations large sample numbers (>100 000 samples) were needed. Here we show that analyzing more refined lipid phenotypes, namely lipoprotein subfractions, can increase the number of significantly associated loci compared with bulk high-density lipoprotein and low-density lipoprotein analysis in a study with identical sample numbers. Moreover, lipoprotein subfractions provide novel insight into the human lipid metabolism. We measured 15 lipoprotein subfractions (L1-L15) in 1791 samples using (1)H-NMR (nuclear magnetic resonance) spectroscopy. Using cluster analyses, we quantified inter-relationships among lipoprotein subfractions. Additionally, we analyzed associations with subfractions at known lipid loci. We identified five distinct groups of subfractions: one (L1) was only marginally captured by serum lipids and therefore extends our knowledge of lipoprotein biochemistry. During a lipid-tolerance test, L1 lost its special position. In the association analysis, we found that eight loci (LIPC, CETP, PLTP, FADS1-2-3, SORT1, GCKR, APOB, APOA1) were associated with the subfractions, whereas only four loci (CETP, SORT1, GCKR, APOA1) were associated with serum lipids. For LIPC, we observed a 10-fold increase in the variance explained by our regression models. In conclusion, NMR-based fine mapping of lipoprotein subfractions provides novel information on their biological nature and strengthens the associations with genetic loci. Future clinical studies are now needed to investigate their biomedical relevance.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        CORONARY-ARTERY-DISEASE; HEART-DISEASE; HDL CHOLESTEROL; RISK; METABOLISM; PLASMA; LIPIDS; SERUM; ATHEROSCLEROSIS; HETEROGENEITY
    
 
    
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        Publication Year
        2012
    
 
    
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        2012
    
 
    
    
        ISSN (print) / ISBN
        0964-6906
    
 
    
        e-ISSN
        1460-2083
    
 
    
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	    Volume: 21,  
	    Issue: 6,  
	    Pages: 1433-1443 
	    Article Number: ,  
	    Supplement: ,  
	
    
 
    
        
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            Oxford University Press
        
 
        
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        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health
30201 - Metabolic Health
30505 - New Technologies for Biomedical Discoveries
30503 - Chronic Diseases of the Lung and Allergies
30202 - Environmental Health
90000 - German Center for Diabetes Research
    
 
    
        Research field(s)
        Genetics and Epidemiology
Enabling and Novel Technologies
    
 
    
        PSP Element(s)
        G-504100-001
G-505600-001
G-503700-001
G-503900-001
G-504200-003
G-504000-001
G-501900-061
G-504200-001
    
 
    
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        Erfassungsdatum
        2012-03-29