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Shetty PB, Tang H, Feng T, Tayo B, Morrison AC, Kardia SLR, Hanis CL, Arnett DK, Hunt SC, Boerwinkle E, Rao DC, Cooper RS, Risch N, Zhu X. Variants for HDL-C, LDL-C, and triglycerides identified from admixture mapping and fine-mapping analysis in African American families. CIRCULATION. CARDIOVASCULAR GENETICS 2015; 8:106-13. [PMID: 25552592 PMCID: PMC4378661 DOI: 10.1161/circgenetics.114.000481] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Admixture mapping of lipids was followed-up by family-based association analysis to identify variants for cardiovascular disease in African Americans. METHODS AND RESULTS The present study conducted admixture mapping analysis for total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and triglycerides. The analysis was performed in 1905 unrelated African American subjects from the National Heart, Lung and Blood Institute's Family Blood Pressure Program (FBPP). Regions showing admixture evidence were followed-up with family-based association analysis in 3556 African American subjects from the FBPP. The admixture mapping and family-based association analyses were adjusted for age, age(2), sex, body mass index, and genome-wide mean ancestry to minimize the confounding caused by population stratification. Regions that were suggestive of local ancestry association evidence were found on chromosomes 7 (low-density lipoprotein cholesterol), 8 (high-density lipoprotein cholesterol), 14 (triglycerides), and 19 (total cholesterol and triglycerides). In the fine-mapping analysis, 52 939 single-nucleotide polymorphisms (SNPs) were tested and 11 SNPs (8 independent SNPs) showed nominal significant association with high-density lipoprotein cholesterol (2 SNPs), low-density lipoprotein cholesterol (4 SNPs), and triglycerides (5 SNPs). The family data were used in the fine-mapping to identify SNPs that showed novel associations with lipids and regions, including genes with known associations for cardiovascular disease. CONCLUSIONS This study identified regions on chromosomes 7, 8, 14, and 19 and 11 SNPs from the fine-mapping analysis that were associated with high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and triglycerides for further studies of cardiovascular disease in African Americans.
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Affiliation(s)
- Priya B Shetty
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Hua Tang
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Tao Feng
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Bamidele Tayo
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Alanna C Morrison
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Sharon L R Kardia
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Craig L Hanis
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Donna K Arnett
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Steven C Hunt
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Eric Boerwinkle
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Dabeeru C Rao
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Richard S Cooper
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Neil Risch
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.)
| | - Xiaofeng Zhu
- From the Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH (P.B.S., T.F., X.Z.); Department of Genetics, Stanford University School of Medicine, Stanford, CA (H.T.); Department of Public Health Sciences, Loyola University of Chicago Stritch School of Medicine, Maywood, IL (B.T., R.S.C.); Division of Epidemiology, Human Genetics and Environmental Sciences, The University of Texas Health Science Center at Houston School of Public Health (A.C.M., C.L.H., E.B.); Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor (S.L.R.K.); Department of Epidemiology, University of Alabama at Birmingham School of Public Health (D.K.A.); Cardiovascular Genetics Division, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City (S.C.H.); Division of Biostatistics, Washington University in St. Louis School of Medicine, St. Louis, MO (D.C. Rao); and Department of Epidemiology and Biostatistics, University of California, San Francisco (N.R.).
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Turlo K, Leung CS, Seo JJ, Goulbourne CN, Adeyo O, Gin P, Voss C, Bensadoun A, Fong LG, Young SG, Beigneux AP. Equivalent binding of wild-type lipoprotein lipase (LPL) and S447X-LPL to GPIHBP1, the endothelial cell LPL transporter. BIOCHIMICA ET BIOPHYSICA ACTA 2014; 1841:963-9. [PMID: 24704550 PMCID: PMC4212522 DOI: 10.1016/j.bbalip.2014.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 03/18/2014] [Accepted: 03/27/2014] [Indexed: 02/05/2023]
Abstract
The S447X polymorphism in lipoprotein lipase (LPL), which shortens LPL by two amino acids, is associated with low plasma triglyceride levels and reduced risk for coronary heart disease. S447X carriers have higher LPL levels in the pre- and post-heparin plasma, raising the possibility that the S447X polymorphism leads to higher LPL levels within capillaries. One potential explanation for increased amounts of LPL in capillaries would be more avid binding of S447X-LPL to GPIHBP1 (the protein that binds LPL dimers and shuttles them to the capillary lumen). This explanation seems plausible because sequences within the carboxyl terminus of LPL are known to mediate LPL binding to GPIHBP1. To assess the impact of the S447X polymorphism on LPL binding to GPIHBP1, we compared the ability of internally tagged versions of wild-type LPL (WT-LPL) and S447X-LPL to bind to GPIHBP1 in both cell-based and cell-free binding assays. In the cell-based assay, we compared the binding of WT-LPL and S447X-LPL to GPIHBP1 on the surface of cultured cells. This assay revealed no differences in the binding of WT-LPL and S447X-LPL to GPIHBP1. In the cell-free assay, we compared the binding of internally tagged WT-LPL and S447X-LPL to soluble GPIHBP1 immobilized on agarose beads. Again, no differences in the binding of WT-LPL and S447X-LPL to GPIHBP1 were observed. We conclude that increased binding of S447X-LPL to GPIHBP1 is unlikely to be the explanation for more efficient lipolysis and lower plasma triglyceride levels in S447X carriers.
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Affiliation(s)
- Kirsten Turlo
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Calvin S Leung
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Jane J Seo
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Chris N Goulbourne
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Oludotun Adeyo
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Peter Gin
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Constance Voss
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - André Bensadoun
- Division of Nutritional Science, Cornell University, Ithaca, NY 14853, United States
| | - Loren G Fong
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States
| | - Stephen G Young
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States; Department of Human Genetics, University of California, Los Angeles, CA 90095, United States.
| | - Anne P Beigneux
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States.
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