Serum YKL-40 levels are associated with type 2 diabetes mellitus in patients with obstructive sleep apnea syndrome.

Patients with obstructive sleep apnea syndrome (OSAS) have an increased risk for type 2 diabetes mellitus (T2DM). It has been recently demonstrated that serum YKL-40 levels, also named as human cartilage glycoprotein 39, are elevated in T2DM patients. The aim of this study was to determine whether serum YKL-40 levels are associated with T2DM in patients with OSAS. This study consisted of 432 patients with OSAS (234 and 198 patients with and without T2DM, respectively). Serum YKL-40 levels were examined using the enzyme-linked immunosorbent assay method. OSAS patients with T2DM had significantly elevated serum YKL-40 levels compared to those without T2DM [205.02 (146.16-272.70) vs 135.72 (114.06-163.38)]. According to the multivariable logistic regression analysis, serum YKL-40 levels were an independent determinant of T2DM in patients with OSAS. Furthermore, based on the linear regression analysis, serum YKL-40 levels were positively associated with the body mass index, systolic blood pressure, serum triglyceride levels, homeostasis model assessment of insulin resistance, and levels of C-reactive protein, fasting plasma glucose, 2-h postprandial plasma glucose, and HbA1c in patients with OSAS. Elevated serum YKL-40 levels may serve as a new biomarker to predict T2DM in patients with OSAS.

Association of GSTP1 and XRCC1 gene polymorphisms with clinical outcomes of patients with advanced non-small cell lung cancer.

We investigated the association between the polymorphisms GSTP1 rs1695 and XRCC1 rs1799782 and rs25487 and the clinical outcome of patients with non-small cell lung cancer (NSCLC) receiving cisplatin-based chemotherapy. Genotyping of GSTP1 rs1695 and XRCC1 rs1799782, and rs25487 was conducted by polymerase chain reaction-restriction fragment length polymorphism analysis. By conditional logistic regression analysis, patients carrying the GG genotype of GSTP1 rs1695 and the AA genotype of XRCC1 rs25487 were found to be more highly associated with response to chemotherapy than were those carrying the AA genotype; the ORs (95%CIs) were 0.13 (0.04-0.37) and 3.37 (1.44-8.53), respectively. Presence of the GG genotype of GSTP1 rs1695 and the GA and AA genotypes of XRCC1 rs25487 was associated with overall survival of NSCLC, and the hazards ratios (95%CI) were 4.35 (1.40-17.92), 0.53 (0.31-0.91), and 0.39 (0.18-0.83), respectively. The results of our study suggest that the GSTP1 rs1695 and XRCC1 rs25487 polymorphisms might affect the clinical outcome of patients with advanced NSCLC receiving cisplatin-based chemotherapy.