Interaction Between Dietary Acid Load and IL6 -572 G/C Polymorphism on Blood Pressure Among Postmenopausal Women in Malaysia

Abstract

Abstract Objectives We examined whether IL6 single nucleotide genetic polymorphism modified the association between dietary acid load (DAL) and blood pressure among postmenopausal women in Malaysia. Methods A total of 211 community-dwelling postmenopausal women were recruited. Dietary intakes of participants were assessed using a validated interview-administered semi-quantitative food frequency questionnaire while DAL was estimated using potential renal acid load (PRAL). Agena® MassARRAY genotyping analysis was used to identify the IL6 genotype and blood pressure was measured using a Digital Automatic BP monitor (OMRON HEM-907, Japan). Interaction between DAL and IL6 -572 G/C polymorphism was assessed using linear regression test. Results There was a significant interaction between DAL and IL6 -572 G/C polymorphism on systolic blood pressure (SBP) (Pinteraction = 0.041). A significant positive association between DAL and SBP with stronger relationship in CG and GG genotype carriers compare to CC carriers were observed. On the other hand, there was no significant diet-gene interaction effect on diastolic blood pressure. Conclusions Our findings suggest that the association between DAL and SBP might be influenced by IL6 -572 G/C polymorphism among postmenopausal women. Further work on how IL6 -572 G/C polymorphism influences the association with DAL on hypertension are warranted. Funding Sources Supported by Fundamental Research Grant Scheme (FRGS), Ministry of Higher Education Malaysia, and Putra Grant UPM.