Association of the polymorphism of interleukin-1B (−511C/T) with type 2 diabetes mellitus patients with and without family history of a first degree relative with diabetes mellitus

Association between IL-1B (-511)/IL-1RN (VNTR) polymorphisms and type 2 diabetes: a systematic review and meta-analysis

Interleukin-1 (IL-1) plays an essential role in the immune pro-inflammatory process, which is regarded as one of many factors in the development of type 2 diabetes mellitus (T2DM). Several case-control studies have illustrated the association of the IL-1B (-511) (rs16944, Chr 2:112,837,290, C/T Intragenic, Transition Substitution) and IL-1RN (VNTR) (gene for IL-1 receptor antagonist, IL-1RA, 86 bp tandem repeats in intron 2) polymorphisms with T2DM risk. However, the results were inconsistent and inconclusive. We performed a meta-analysis (registry number: CRD42021268494) to assess the association of the IL-1B (-511) and IL-1RN (VNTR) polymorphisms with T2DM risk. Random-effects models were applied to calculate the pooled ORs (odds ratios) and 95% CIs (confidence intervals) to test the strength of the association in the overall group and subgroups stratified by ethnicity, respectively. Between-study heterogeneity and publication bias were evaluated by the Q-test, I² statistic, Harbord test, and Peters test accordingly. Sensitivity analyses were also performed. A total of 12 publications evaluating the association of IL-1B (-511) and IL-1RN (VNTR) polymorphisms with the risk of T2DM development were included. The meta-analysis showed that IL-1RN (VNTR) was related to the increasing development of T2DM risk in the recessive model (OR = 1.62, 95% CI [1.09-2.42], P_het = 0.377, P_z = 0.018) and in the homozygous model (OR = 2.02, 95% CI [1.07-3.83], P_het = 0.085, P_z = 0.031), and the IL-1RN 2* allele was found a significant association with evaluated T2DM risk in all ethnicities (OR = 2.08, 95% CI [1.43-3.02], P_het < 0.001, P_z < 0.001) and in EA (OR = 2.01, 95% CI [1.53-2.66], P_het = 0.541, P_z < 0.001). Moreover, stratification by ethnicity revealed that IL-1B (-511) was associated with a decreased risk of T2DM in the dominant model (OR=0.76, 95% CI [0.59-0.97], P_het = 0.218, P _z = 0.027) and codominant model (OR = 0.73, 95% CI [0.54-0.99], P_het = 0.141, P_z = 0.040) in the East Asian (EA) subgroup. Our results suggest that the IL-1RN 2* allele and 2*2* homozygous polymorphism are strongly associated with increasing T2DM risk and that the IL-1B (-511) T allele polymorphism is associated with decreasing T2DM risk in the EA subgroup.

Association between Interleukin-1β Polymorphism at Rs16944 and Glucose Metabolism: A Cohort Study

Background: This study explored the correlation between the interleukin-1β gene rs16944 polymorphism and diabetes through epidemiological and follow-up investigations.Methods: The study was conducted on 600 subjects with normal glucose metabolism recruited from participants of the Risk Evaluation of cAncers in Chinese type 2 diabeTic Individuals: A lONgitudinal (REACTION) study in Luzhou, China in 2011. All subjects received a unified standardized questionnaire, physical examination, laboratory examination, and follow-up in 2016. Subjects were divided into normal glucose metabolism (NC), pre-diabetes (PDM), and type 2 diabetes mellitus (T2DM) groups according to their glucose metabolism after follow-up. The IL-1β gene rs16944 polymorphism was analyzed using the polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) technique.Results: After follow-up, 386, 156, and 58 cases were observed in the NC, PDM, and T2DM groups, respectively. Serum IL-1β levels were compared to baselines at follow-up in the 3 groups; the difference in the T2DM group was statistically significant. The frequency distributions of the IL-1β gene rs16944 genotypes, i.e., CC, CT, and TT, were significantly different in the 3 groups, and the distributions in the T2DM and NC groups were significantly different. The frequency distributions of the C and T alleles of IL-1β rs16944 were not significantly different. Logistic regression analysis identified the CC+CT genotype as an independent risk factor for the development of diabetes in patients with normal glucose metabolism (OR = 2.457, 95% CI: 1.238-4.877).Conclusions: The IL-1β gene rs16944 C/T polymorphism may cause genetic susceptibility to T2DM in the Luzhou population. The CC+CT genotypes may increase T2DM risk.