Dose Dependent Effect of Sulfamethoxazole on Inhibiting K Channel of Mouse Pancreatic β Cell
| Autor: | Hiroshi Ogata, Shigeki Kitamura, Makoto Fujiwara, Masaru Shimizu, Chengbo Tan, Songji Zhao, Yuko Maejima, Kenju Shimomura |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Dose-Response, Vol 21 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1559-3258 15593258 |
| DOI: | 10.1177/15593258231203611 |
| Popis: | Sulfamethoxazole (SMX) is widely used as an antibiotic in the clinical application with side effects of hypoglycemia. This is because SMX contains the sulfonamide structure, which closes ATP-sensitive potassium (K ATP ) channels and induces insulin secretion. However, there are no detail reports that measure the effective dose that can close K ATP channels and induce insulin secretion. In this study, whole-cell patch clamp recording was utilized to measure the effect of SMX on K ATP channel activity on pancreatic β cells. Also, the static incubation assay with mice islets was assessed to measure the insulin secretion capacity of SMX. SMX was shown to inhibit the K ATP channel in pancreatic β cell membrane and induce insulin secretion in relatively high concentration. The half maximal inhibitory concentration (IC 50 ) for K ATP channel activity of SMX was .46 ± .08 mM. It was also shown that a near IC 50 concentration of SMX (.5 mM) was able to nearly fully block the K ATP channel when simultaneously applied with low concentration sulfonylurea, tolbutamide (.01 mM). Our present data provide important information for the clinical use of SMX to treat infection in diabetic patients using sulfonylureas. |
| Databáze: | Directory of Open Access Journals |
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