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Relationship of Plasma Interleukin-6 and Its Genetic Variants With Hypertension in Hong Kong Chinese.
MedLine Citation:
PMID:  21833041     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BackgroundInterleukin-6 (IL6) plays a central role in inflammation, insulin resistance, and atherogenesis. We investigated the associations of plasma IL6 and its genetic variants with hypertension in both cross-sectional and prospective study designs.MethodsPlasma IL6 was measured in 648 normotensive and 294 hypertensive subjects from the Hong Kong Cardiovascular Risk Factor Prevalence Study (CRISPS)-2 in 2000-2004 and three tagging single-nucleotide polymorphisms (SNPs) in the IL6 gene were genotyped. Among subjects normotensive in CRISPS-2 (baseline), 515 subjects were followed-up in CRISPS-3 in 2005-2008 and 100 of them had developed hypertension.ResultsAt baseline, plasma IL6 correlated with systolic blood pressure (SBP) (r = 0.128, P < 0.001). Hypertensive subjects had significantly higher plasma IL6 after adjusting for age and sex (geometric mean (95% confidence interval (CI) = 0.60 (0.54-0.65) vs. 0.47 (0.44-0.50) ng/l, P = 0.021). In multiple logistic regression, higher plasma IL6 was associated with hypertension in women (P = 0.009), but not in men. The minor G allele of SNP rs1800796 was associated with lower plasma IL6 (geometric mean (95% CI) = 0.46 (0.41-0.51) ng/l for CG and 0.49 (0.39-0.62) ng/l for GG vs. 0.53 (0.50-0.57) ng/l for CC, P = 0.005). However, this SNP was not associated with hypertension or blood pressure at baseline. Among subjects normotensive in CRISPS-2, plasma IL6 was not associated with the development of hypertension in CRISPS-3.ConclusionThe SNP rs1800796 affected plasma IL6 with a small effect size. Elevated plasma IL6 is associated with prevalent hypertension in women, but not incident hypertension.American Journal of Hypertension (2011). doi:10.1038/ajh.2011.141.
Authors:
Bernard M Y Cheung; Kwok Leung Ong; Annette W K Tso; Raymond Y H Leung; Stacey S Cherny; Pak Chung Sham; G Neil Thomas; Tai Hing Lam; Karen S L Lam
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-8-11
Journal Detail:
Title:  American journal of hypertension     Volume:  -     ISSN:  1941-7225     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-8-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8803676     Medline TA:  Am J Hypertens     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1] Department of Medicine, The University of Hong Kong, Pokfulam, Hong Kong [2] Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Pokfulam, Hong Kong.
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