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Effect of Seleno-L-methionine on Oxidative Stress in the Pancreatic Islets of a Short-Term Induced Diabetic Mouse Model in Insufficient Selenium Status

Effect of Seleno-L-methionine on Oxidative Stress in the Pancreatic Islets of a Short-Term Induced Diabetic Mouse Model in Insufficient Selenium Status

Hitoshi Ueno, Ryo Shimizu, Tomofumi Okuno, Hirofumi Ogino, Tomohiro Arakawa, Koichi Murano, Katsuhiko Nakamuro

Biol Pharm Bull. 2018;41(1):80-85.

PMID: 29311486

Abstract:

The protective effects of seleno-L-methionine (SeMet) on oxidative stress in pancreatic islets were investigated with a short-term nicotinamide (NA) and streptozotocin (STZ)-induced diabetic mouse model. ICR mice were intraperitoneally injected twice with 100 mg/kg STZ and 120 mg/kg NA at a 1-d interval and were then orally administered 158 µg Se/kg SeMet with free access to a selenium-deficient diet for 5 weeks. Administration of SeMet significantly improved the levels of glycated hemoglobin (HbA1c), non-fasting and oral glucose tolerance-tested (OGTT) blood glucose, plasma adiponectin and hepatic glycogen that deteriorated by NA/STZ treatment. However, supplementary SeMet did not restore non-fasting plasma insulin levels in NA/STZ treatment group and significantly suppressed OGTT plasma insulin levels in the control group. Although SeMet significantly suppressed 8-hydroxy-2'-deoxyguanosine density in pancreatic islets, SeMet did not restore insulin density. The hepatic and pancreatic mRNA levels of glutathione peroxidase 1 (GPX1) increased by NA/STZ treatment or SeMet administration. These results suggest that although a physiological level of SeMet improves glucose tolerance by exhibiting insulin-mimetic activity in a short-term induced diabetic mouse model under insufficient Se status, the suppression of pancreatic oxidative stress with the induction GPX1 by SeMet supplementation is unlikely to restore insulin storage and secretion.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP3211765-B	Seleno-L-methionine		3211-76-5	Price

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