Publication date: 30 April 2018
Source:Gene, Volume 652
Author(s): Edith Elena Uresti-Rivera, Rocío Edith García-Jacobo, José Alfredo Méndez-Cabañas, Laura Elizabeth Gaytan-Medina, Nancy Cortez-Espinosa, Diana Patricia Portales-Pérez, Roberto González-Amaro, José Antonio Enciso-Moreno, Mariana Haydee García-Hernández
It has been reported that an increased function of the P2X7 purinergic receptor is associated with an increase in both insulin sensitivity and secretion. Accordingly, we explored the possible effect of the 1068 G>A polymorphism of the gene P2RX7 on glucose homeostasis and the levels of the anti-inflammatory cytokine IL-1Ra in T2D patients. The presence of the 1068 G>A polymorphism in T2D patients (n = 100) and healthy subjects (n = 100) was determined by DNA sequencing, and serum levels of IL-1Ra were measured by ELISA. Pancreatic β-cell function, insulin resistance, blood glucose levels and glycated hemoglobin (HbA1c) were also analyzed. We detected a significant negative association between T2D and the 1068 G>A SNP (Odds ratio 0.3916, p = 0.0045). In addition, we observed that T2D patients bearing the 1068 G>A variant showed higher serum levels of IL-1Ra compared to both, patients with the GG genotype or healthy individuals (GG or G>A). Moreover, T2D patients bearing the 1068 G>A SNP showed increased insulin levels and a better pancreatic β-cell function (p < 0.05 in both cases) compared to patients with the wild type genotype. However, the HbA1c levels, fasting glucose levels and the degree of insulin resistance were similar in T2D patients carrying or not the G>A SNP. Our results suggest that although the 1068 G>A polymorphism of the P2RX7 gene is associated with an increased β-cell function and IL-1Ra release in T2D patients, the glycemic control is not significantly affected by the presence of this SNP.
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