title: Relationship between plasma homocysteine level and lipid profiles in a community-based Chinese population.
abstract: BACKGROUND
  Previous studies established a possible link among hyperhomocysteinemia (HHcy), dyslipidemia, and atherosclerosis. However, there was limited epidemic data concerning the relation between HHcy and lipid profiles, especially in community-based Chinese populations. This study aim to investigate the association of plasma homocysteine (Hcy) level with lipid profiles in a Chinese community-based population without lipid-lowering treatment.
  
  
  METHODS
  A total of 4660 Chinese subjects from a cohort of the Shijingshan district in Beijing were included in the analysis. Plasma total Hcy, serum lipid files including total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) as well as relevant metabolic risk factors were measured. Multivariate regression models adjusting for age, gender, smoking, drinking, physical activity, vitamin B supplement, body mass index, fasting blood glucose level, serum creatinine, systolic and diastolic blood pressure were used to evaluate associations of Hcy and lipid profiles.
  
  
  RESULTS
  Subjects were 56.75 ± 8.91 years old, and 38.15% were male. Median (IQR) Hcy was 11.98 (10.00-14.93) μmol/L, and 24.4% had HHcy (defined as Hcy ≥ 15 μmol/L). Mean (SD) baseline TC was 5.34 ± 0.98 mmol/L, LDL-C was 3.27 ± 0.81 mmol/L, and HDL-C was 1.43 ± 0.38 mmol/L. Median (IQR) of TG was 1.28 (0.91-1.85) mmol/L. In multivariable linear-regression analyses, lnHcy (ln transformation for Hcy) level was positively associated with lnTG (adjusted β = 0.075, SE = 0.021, P = 0.001). Using Hcy < 15 μmol/L as a reference, HHcy was independently associated with both lnTG (adjusted β = 0.056, SE = 0.020, P = 0.004) and lnHDL (adjusted β = -0.018, SE = 0.009, P = 0.038). In multivariable logistic-regression analyses, HHcy was associated with increasing risk of low HDL-C (HDL-C < 1.04 mmol/L; adjusted odds ratio [OR] =1.406, 95% confidence interval [CI]: 1.143 - 1.728, P = 0.001) and hypertriglyceridemia (TG ≥ 1.7 mmol/L; adjusted OR = 1.293, 95% CI: 1.096-1.524, P = 0.002) after adjusting the confounders. However, there were no significant associations between Hcy and TC or LDL-C.
  
  
  CONCLUSIONS
  The present study showed that HHcy was independently associated with hypertriglyceridemia and low levels of HDL-C, which provides evidence that Hcy levels might affect HDL-C and TG metabolism.
authors.affiliation: Department of Cardiology, Peking University First Hospital, Beijing, China.
authors.forename: Mohetaboer
authors.initials: M
authors.lastname: Momin
authors.affiliation: Department of Cardiology, Peking University First Hospital, Beijing, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Jia
authors.affiliation: Department of Cardiology, Peking University First Hospital, Beijing, China.
authors.forename: Fangfang
authors.initials: F
authors.lastname: Fan
authors.affiliation: Department of Cardiology, Peking University First Hospital, Beijing, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Endocrinology, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China.
authors.forename: Jingtao
authors.initials: J
authors.lastname: Dou
authors.affiliation: Department of Epidemic & Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.
authors.forename: Dafang
authors.initials: D
authors.lastname: Chen
authors.affiliation: Department of Cardiology, Peking University First Hospital, Beijing, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Huo
authors.affiliation: Department of Cardiology, Peking University First Hospital, Beijing, China. drzhy1108@163.com.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D044466:Asian People; D000068476:Beijing; D015415:Biomarkers / Q000097:blood; D008076:Cholesterol, HDL / Q000097:blood; D015331:Cohort Studies; D005260:Female; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D015228:Hypertriglyceridemia / Q000097:blood; D008055:Lipids / Q000097:blood*; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis
chemical_list: D015415:Biomarkers; D008076:Cholesterol, HDL; D008055:Lipids; D006710:Homocysteine
keywords: High-density lipoprotein cholesterol; Homocysteine; Triglycerides