Clinical Implication of Plasma Hydrogen Sulfide Levels in Japanese Patients with Type 2 Diabetes

Kunihiro Suzuki, Masaaki Sagara, Chie Aoki, Seiichi Tanaka, Yoshimasa Aso, Kunihiro Suzuki, Masaaki Sagara, Chie Aoki, Seiichi Tanaka, Yoshimasa Aso

Abstract

Objective The goal of the present study was to investigate the plasma hydrogen sulfide (H2S) levels in patients with type 2 diabetes, as the plasma H2S levels in Japanese patients with type 2 diabetes remain unclear. Methods The plasma H2S levels were measured in 154 outpatients with type 2 diabetes and 66 outpatients without diabetes. All blood samples were collected in the outpatient department from 09:00 to 10:00. The patients had fasted from 21:00 the previous evening and had not consumed alcohol or caffeine or smoked until sample collection. The plasma H2S levels were measured using the methylene blue assay. The plasma H2S levels were determined in triplicate, and the average concentrations were calculated against a calibration curve of sodium sulfide. Results The patients with type 2 diabetes showed a progressive reduction in the plasma H2S levels (45.115.5 M versus 54.026.4 M, p<0.05), which paralleled poor glycemic control. There was a significant correlation between a reduction in the plasma H2S levels and the HbA1c levels (=-0.505, p<0.01), Furthermore, a reduction in the plasma H2S levels was found to be related to a history of cardiovascular diseases in patients with type 2 diabetes (39.913.8 M versus 47.515.9 M, p<0.01). Conclusion Collectively, the plasma H2S levels were reduced in patients with type 2 diabetes, which may have implications in the pathophysiology of cardiovascular disease in diabetic patients. The trial was registered with the University Hospital Medical Information Network (UMIN no. #000020549).

Figures

Figure.
Figure.
The plasma H2S levels in patients with and without type 2 diabetes. (a) A comparison of the patients with and without type 2 diabetes. (b) The influence of glycemic control on the plasma H2S levels. (c) The relationship between a history of cardiovascular disease (CVD) and the plasma H2S levels in patients with type 2 diabetes.

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Source: PubMed

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