Associations between GRM7 polymorphisms and obesity in patients selected for sleeve gastrectomy

Association Between RORA Polymorphisms and Obesity

RORα is a transcription factor encoded by RORA gene. This protein is involved in several metabolic conditions, including obesity. We assessed association between two polymorphisms within this gene (namely rs11639084 and rs4774388) and severe obesity in Iranian population. Both SNPs were associated with obesity in all models (P < 0.0001) except for over-dominant model. T allele of rs11639084 was associated with this trait with OR (95% CI) of 16.85 (13.11-21.67) and was considered as the risk allele. Allelic model best fit the data, since the AIC value for this model was the highest (AIC = 28.82). In the co-dominant model, TT genotype was associated with obesity with OR (95% CI) of 301.6 (137.4-662.1). This genotype was shown to be the risk genotype in the recessive model when compared with TC+CC (OR (95% CI) = 60.54 (30.35-120.7)). The C allele of rs4774388 was shown to be the risk allele with OR (95% CI) of 4.61 (3.72-5.71). In the recessive model, the CC genotype was associated with the mentioned trait with OR (95% CI) of 9.92 (6.62-14.8). This model best fit the data (AIC = 37.08). Cumulatively, the current study suggests contribution of RORα to the pathogenesis of obesity.

Impact of GRM7 gene variations on glioblastoma risk in the Iranian population

AIM

The metabotropic glutamate receptor, GRM7 is a gene in the neurotransmitters prognostic signatures. Downregulation of this gene is associated with the progression of glioma tumors and has a negative impact on the immune response.

METHODS

In the present study, we aim to assess the associations between rs6782011 and rs779867 SNPs within this gene and risk of glioblastoma multiforme (GBM) in Iranian population.

RESULTS

There was a noteworthy difference in distribution of genotypes (P value = 0.001) and alleles (P value = 0.0002) of rs779867 between total GBM cases (n = 299) and total normal controls (n = 302). In addition, the significant difference in genotypes and alleles distribution was observed for both male and female GBM cases vs. respective normal controls. For rs6782011 variant, the significant difference in genotypes distribution was observed between male GBM cases (n = 187) vs. respective normal controls (n = 156) (P value = 0.004) and between total GBM cases (n = 299) vs. total normal controls (n = 302) (P value = 0.02). However, there was no significant difference in genotypes distribution between female GBM cases and respective normal controls (P value = 0.1). Distribution of rs6782011 alleles was not different between total GBM cases and normal controls; and between male GBM cases and male normal controls. However, there was a significant difference in alleles distribution between female GBM cases and female normal controls.

CONCLUSION

Taken together, the mentioned polymorphisms might affect risk of GBM in Iranian population. Future studies are needed to elaborate the underlying mechanism.