Key result
ADIPOQ and IL6 variants were not directly related to obesity, but individuals carrying the ADIPOQ 45G allele had significantly higher IL-6, IL-1β, and TNFα levels than TT genotype carriers.
Why the study?
Are ADIPOQ and IL6 gene polymorphisms associated with altered pro-inflammatory and cardiometabolic markers in obese patients?
Cross-Sectional (n=249)
No
Are ADIPOQ and IL6 gene polymorphisms associated with altered pro-inflammatory and cardiometabolic markers in obese patients?
ADIPOQ and IL6 gene polymorphisms are associated with a heightened pro-inflammatory state, potentially contributing to cardiometabolic risk in obese individuals.
ADIPOQ 45G may associate with heightened inflammation in obesity; hypothesis-generating and should not yet change genotyping or practice.
BACKGROUND: Polymorphisms in genes encoding adiponectin (ADIPOQ) and interleukin-6 (IL6) have been associated with adiposity and obese-related phenotypes. This study investigated the relationship of ADIPOQ and IL6 gene polymorphisms with pro-inflammatory and cardiometabolic markers in obese patients. METHODS: Anthropometric and body composition parameters were measured in 249 Brazilian subjects (30 to 68 yr). Metabolic and inflammatory markers and adipokines were analyzed in blood samples. ADIPOQ rs2241766 (45 T > G) and IL6 rs1800795 (-174G > C) polymorphisms were analyzed by real-time PCR and PCR-RFLP, respectively. RESULTS: Type 2 diabetes, hypertension, dyslipidemia and increased values of waist circumference, body fat, leptin, fibrinogen, IL-1β, hsCRP and TNFα were related to obesity (p < 0.05). Multiple linear regression analysis showed a positive correlation between BMI and waist circumference, body fat, leptin, fibrinogen, PAI-1, IL-1β, hsCRP and TNFα values (p < 0.001) but not with adiponectin. Obese group had altered metabolic status, resistance to leptin and insulin, and atherogenic and pro-inflammatory profiles. ADIPOQ and IL6 variants were not directely related to obesity, leptin resistance or alterations in cardiometabolic markers. Individuals carrying ADIPOQ 45G allele (TG + GG genotype) had higher IL-6, IL-1β and TNFα levels than TT genotype carriers (p < 0.05). IL6 -174GG genotype was associated with increased IL-1β levels (p = 0.033). CONCLUSION: Obesity is associated with leptin resistance, cardiometabolic alterations and a pro-inflammatory status. Our results are suggestive that ADIPOQ and IL6 polymorphisms contribute to cardiometabolic risk in obese individuals.
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Oliveira et al. (2015) conducted a cross-sectional in Obesity and cardiometabolic dysfunction (n=249). ADIPOQ rs2241766 and IL6 rs1800795 polymorphisms vs. Wild-type genotypes was evaluated on Association with obesity, leptin resistance, and cardiometabolic markers. ADIPOQ and IL6 variants were not directly related to obesity, but individuals carrying the ADIPOQ 45G allele had significantly higher IL-6, IL-1β, and TNFα levels than TT genotype carriers.
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