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Many genetic loci affect circulating lipid levels, but it remains unknown whether lifestyle factors, such as 296 physical activity, modify these genetic effects. To identify lipid loci interacting with physical activity, we 297 performed genome-wide analyses of circulating HDL cholesterol, LDL cholesterol, and triglyceride levels in up 298 to 120,979 individuals of European, African, Asian, Hispanic, and Brazilian ancestry, with follow-up of 299 suggestive associations in an additional 131,012 individuals. We find four loci, in/near CLASP1, LHX1, SNTA1, 300 and CNTNAP2, that are associated with circulating lipid levels through interaction with physical activity; higher 301 levels of physical activity enhance the HDL cholesterol-increasing effects of the CLASP1, LHX1, and SNTA1 loci 302 and attenuate the LDL cholesterol-increasing effect of the CNTNAP2 locus. The CLASP1, LHX1, and SNTA1 303 regions harbor genes linked to muscle function and lipid metabolism. Our results elucidate the role of physical 304 activity interactions in the genetic contribution to blood lipid levels.
- cardiovascular genetics
- genome-wide association study
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