title: Association of gene variants with lipid levels in response to fenofibrate is influenced by metabolic syndrome status.
abstract: OBJECTIVE
  Fenofibrate therapy reduces serum triglycerides (TG) and increases high-density lipoprotein-cholesterol (HDL-C) and thus addresses the atherogenic dyslipidemia associated with metabolic syndrome (MetS). Our hypothesis is that genetic factors contribute to the variability of lipid response to fenofibrate differently in subjects with MetS and without MetS.
  
  
  METHODS
  We investigated the association in 25 candidate genes with lipid responses to a 3-weeks trial on fenofibrate in subjects with and without MetS. We employed growth curve mixed models to generate the response phenotypes to fenofibrate in TG, HDL-C, and low-density lipoprotein-cholesterol (LDL-C) and examined the genetic associations accounting for family dependencies.
  
  
  RESULTS
  After correcting for multiple testing (p<0.05) and accounting for significant differences in the association effect sizes between subjects with and without MetS (p<0.05), variants of APOA5 (rs662799) and APOE (rs429358) were associated with HDL-C and LDL-C responses in MetS subjects, while APOA4 (rs675) was associated with TG response in non-MetS subjects. There was also suggestive evidence that MetS may interact with APOA4 (p=0.017), APOA5 (p=0.06), and APOE (p=0.09) to the variation to lipid responses.
  
  
  CONCLUSIONS
  Genetic effects that contributed to the variability of lipid responses to fenofibrate may differ in subjects with and without MetS. This research may provide guidance for more personalized and effective therapies.
authors.affiliation: Division of Statistical Genomics, Washington University School of Medicine, St. Louis, MO 63108-2212, USA. mfeitosa@wustl.edu
authors.forename: Mary F
authors.initials: MF
authors.lastname: Feitosa
authors.forename: Ping
authors.initials: P
authors.lastname: An
authors.forename: Jose M
authors.initials: JM
authors.lastname: Ordovas
authors.forename: Shamika
authors.initials: S
authors.lastname: Ketkar
authors.forename: Paul N
authors.initials: PN
authors.lastname: Hopkins
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Straka
authors.forename: Donna K
authors.initials: DK
authors.lastname: Arnett
authors.forename: Ingrid B
authors.initials: IB
authors.lastname: Borecki
mesh_terms: D000328:Adult; D000368:Aged; D000072040:Apolipoprotein A-V; D001054:Apolipoproteins A / Q000235:genetics; D001057:Apolipoproteins E / Q000235:genetics; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D050171:Dyslipidemias / Q000235:genetics; D005260:Female; D011345:Fenofibrate / Q000627:therapeutic use*; D006801:Humans; D050356:Lipid Metabolism / Q000235:genetics*; D008297:Male; D024821:Metabolic Syndrome / Q000188:drug therapy* / Q000235:genetics*; D008875:Middle Aged; D014280:Triglycerides / Q000097:blood
chemical_list: C437704:APOA5 protein, human; D000072040:Apolipoprotein A-V; D001054:Apolipoproteins A; D001057:Apolipoproteins E; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D014280:Triglycerides; C022205:apolipoprotein A-IV; D011345:Fenofibrate