Association Between Interleukin-10-3575T>A (rs1800890) Polymorphism and Cancer Risk

IL-10 and IL-1β Serum Levels, Genetic Variants, and Metabolic Syndrome: Insights into Older Adults' Clinical Characteristics

Populational aging is marked by chronic noncommunicable diseases, such as metabolic syndrome (MetS). IL-10 and IL-1β are pleiotropic cytokines with multiple biological effects linked to metabolic disorders. This cross-sectional study assessed 193 participants' IL-10 and IL-1β serum levels regarding their role in developing MetS, clinical characteristics, and their IL1B rs1143627 and IL10 rs1800890 variants' genotype frequencies in a population over 60. IL-10 levels correlated weakly with HDL levels and fat mass and inversely with triglycerides, glucose, glycated hemoglobin, and estimated average blood glucose levels. IL-10 levels were also indirectly influenced by the patient's T2DM duration, lean mass amount, and bone mineral content. Participants with altered HDL, elevated serum glucose, raised HbA1c levels, or those over 80 had reduced serum IL-10 levels compared to those with normal levels or other age groups, respectively. Women also had higher serum IL-10 levels than men. Dissimilarly, IL-1β levels correlated directly only with the number of total leukocytes and segmented neutrophils, showing only significant variations with self-reported alcohol consumption. Our study also found that those with the IL10 AA genotype (lower IL-10 levels) had a significantly higher risk of developing MetS. These findings may help direct future research and more targeted therapeutic approaches in older adults.

Association Between X-Ray Repair Cross-Complementing Group 1 Arg399Gln Polymorphism and Risk of Oral Leukoplakia: A Meta-analysis

Aims: Previous studies have have reported inconsistent results regarding the association of the XRCC1 polymorphism Arg399Gln with oral leukoplakia (OLK) risk. This study was designed to assess the existing evidence of this association using a meta-analytic approach. Materials and Methods: The literature was searched using multiple databases, including PubMed, EMBASE, and China National Knowledge Infrastructure (CNKI), through October 22, 2020. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were used to evaluate the strength of any associations. Results: A total of 671 Indian cases and 1009 Indian controls from seven case-control studies were included in the meta-analysis. The overall analysis revealed that the AA genotype was associated with a significantly increased OLK risk compared with the GG+GA genotypes (OR = 1.51, 95% CI = 1.10-2.06). In the subgroup analysis stratified by tobacco use, a significant association was found in the mixed group (OR = 1.51, 95% CI = 1.12-2.56), but not in the tobacco-using group or the no tobacco use group. In the OLK subtype subgroup analysis, a significantly increased risk was found in the hyperplastic subgroup (OR = 5.01, 95% CI = 1.39-18.11), whereas no associations were found in the dysplastic or mixed subgroups. Conclusions: The results of this meta-analysis suggest that the XRCC1 Arg399Gln polymorphism may significantly contribute to susceptibility to OLK in the Indian population.

Associations Among Glutathione S-Transferase T1, M1, and P1 Polymorphisms and the Risk of Oral Leukoplakia

AIMS

The potential association between glutathione S-transferase (GST) M1, T1, P1 polymorphisms and the risk of oral leukoplakia (OLK) has been extensively studied. However, the results of previous studies have been contradictory. In an effort to resolve these different findings we performed a meta-analysis.

MATERIALS AND METHODS

Eligible articles were identified by a search of PubMed, the China National Knowledge Infrastructure (CNKI), MEDLINE, EMBASE, and the Web of Science databases through December 1, 2015. Crude odds ratios (ORs) with 95% confidence intervals were used to evaluate the risk of OLK by tobacco use, ethnicity, and OLK subtype.

RESULTS

A total of 3122 cases and 6037 controls were included in the meta-analysis. The results indicated that the glutathione S-transferase Mu1 (GSTM1) and glutathione S-transferase T1 (GSTT1) null polymorphisms increase the risk of OLK (OR = 1.838, 95% CI = 1.582-2.134 and OR = 1.337, 95% CI = 1.132-1.579, respectively), especially in the groups with tobacco use (OR = 2.478, 95% CI = 2.032-3.020 and OR = 2.034, 95% CI = 1.486-2.783, respectively). Conversely the glutathione S-transferase P1 (GSTP1) polymorphism did not demonstrate a significant relationship with OLK risk (OR = 1.139, 95% CI = 0.900-1.442). The GSTM1 and GSTT1 null polymorphisms were identified as being significantly associated with an increased risk of OLK within the German and Indian populations: German subgroup (GSTM1: OR = 11.555, 95% CI = 7.465-17.884), Indian subgroup (GSTM1: OR = 1.333, 95% CI = 1.084-1.638; GSTT1: OR = 1.332, 95% CI = 1.057-1.679).

CONCLUSIONS

Our findings provide evidence that the GSTT1 and GSTM1 null polymorphisms may be risk factors of OLK, especially for persons who use tobacco, whereas the GSTP1 polymorphism does not contribute to the development of OLK. Thus, detection of GSTT1 and GSTM1 null polymorphisms may be promising biomarkers for the OLK susceptibility.