Ameliorated pancreatic β cell dysfunction in type 2 diabetic patients treated with a sodium-glucose cotransporter 2 inhibitor ipragliflozin
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概要
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It remains to be seen whether pancreatic β cell dysfunction in type 2 diabetic patients can be ameliorated just by correcting hyperglycemia. The current pilot study investigated β cell function after a four-week treatment with a sodium-glucose cotransporter 2 (SGLT2) inhibitor ipragliflozin in Japanese patients with type 2 diabetes mellitus. Ten participants (age, 51 ± 13 years; hemoglobin A1c levels, 9.4 ± 1.0%) took 50 mg of ipragliflozin L-proline for four weeks and thereafter discontinued the agent for one week. A 75-g oral glucose tolerance test (OGTT) was performed at 0 (baseline), 4 (end of medication), and 5 weeks (end of washout). The β cell function was evaluated using the disposition index, which was calculated as the product of the ΔI0-120/ΔG0-120 and the Matsuda index, where ΔI0-120/ΔG0-120 represents the ratio of the incremental concentrations of insulin to those of glucose during the 0- to 120-min time period of the OGTT. The fasting glucose level was 182 ± 34 mg/dl at 0 week, 137 ± 20 mg/dl at 4 weeks (p < 0.001), and 154 ± 31 mg/dl at 5 weeks (p = 0.001). Compared to baseline, the disposition index was significantly elevated not only at 4 weeks (p < 0.001) but also at 5 weeks (p = 0.008). In conclusion, the current pilot study showed that the β cell function assessed by the OGTT-derived disposition index was significantly improved after a four-week treatment with ipragliflozin in Japanese patients with type 2 diabetes mellitus.
- 一般社団法人 日本内分泌学会の論文
一般社団法人 日本内分泌学会 | 論文
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