Anti-RETN polyclonal antibody [Biotin]

Background: The genetic contribution to obesity and to circulating adipokine levels has not been completely clarified. We aimed to evaluate adipokine genes' single-nucleotide polymorphism (SNP) prevalence and its association with circulating adipokine levels and risk factors for cardiovascular disease in an obese Portuguese pediatric population. Methods: Two hundred forty-eight obese adolescents (mean age 13.4 years old; 47.2% females) participated in a cohort study. We screened 12 SNPs by direct sequencing in five adipokine genes: adiponectin (ADIPOQ: rs16861194, rs17300539, rs266729, rs2241766, rs1501299), interleukin-1 (IL-1; rs1143627), IL-6 (IL-6; rs1800795), tumor necrosis factor- (TNF-; rs1800629), and resistin (RETN; rs1862513, rs3219177, rs3745367, rs3745368). Biochemical analysis included determination of circulating adipokines, C-reactive protein (CRP) levels, lipid profile, and markers of insulin resistance. Results: Compared to males, females presented higher circulating levels of insulin, adiponectin, IL-6, resistin, and leptin concentrations, but lower TNF- levels. No statistically significant differences were found for genotype or allelic distributions between genders. In the whole sample population, adiponectin levels were influenced by ADIPOQ rs17300539 (c.-1138G>A; lower in subjects with GG genotype). When only males were considered, IL-1, IL-6, and TNF- levels were associated with ADIPOQ rs1501299 (c.214+62G>T; higher in GG subjects). TNF- concentrations were modulated by TNF-rs1800629 (c.-488G>A; lower in GG males), RETN rs1862513 (c.-216C>G; higher in CC subjects), and RETN rs3219177 (c.118+39C>T; higher in CC subjects). Leptin levels were influenced by IL-1 rs1143627 (c.-118C>T) presenting TT individuals' lower levels. Conclusions: Our data demonstrate that in pediatric obese patients, some adipokine gene SNPs have an association with circulating adipokine levels and lipid profile.

Elevated resistin levels and the polymorphisms located at gene encoding resistin (REIN) are associated with diabetic pathogenesis. However, the correlation between RETN genotypes and T2DM is controversial due to discrepancies among reports. This study aimed at investigating and clarifying the putative association of RETN and T2DM in Taiwanese population. The resistin levels and REIN -420C>G genotypes in 244 control and 305 T2DM subjects were examined. Meanwhile, the association between genetic polymorphism of RETN -420C>G and resistin levels, as well as between REIN -420C>G and subjects' clinical characteristics was statistically analyzed. The REIN -420C>G genotypes (p = 0.01) and G allele (p = 0.002) were significantly associated with T2DM. In addition, concanavalin A-stimulated peripheral blood mononuclear cells from T2DM subjects had higher resistin-secreting ability (p = 0.044). Nevertheless, no significant association between the subjects' biochemical data and RETN -420 SNPs was found. Our results indicate that -420C>G SNPs and G allele are significantly associated with T2DM. Investigation of RETN polymorphisms in T2DM patients from various ethnic populations are crucial and will contribute to the understanding of this gene in the diabetic etiology. The present results may contribute to gain knowledge on the complex genetic heterogeneity of type 2 diabetes.