Metformin normalizes type 2 diabetes-induced decrease in cell proliferation and neuroblast differentiation in the rat dentate gyrus.

Abstract:

:In this study, we observed the effects of metformin, one of the most widely prescribed drugs for the treatment of type 2 diabetes, on cell proliferation and neuroblast differentiation in the subgranular zone of the hippocampal dentate gyrus (SZDG) in Zucker diabetic fatty (ZDF) rats, which are a model for type 2 diabetes. For this, metformin was administered orally once a day to 14-week-old ZDF rats for 2 weeks and the animals were sacrificed at 16 weeks of age. During this period, blood glucose levels were higher in the vehicle-treated ZDF rats than in the Zucker lean control (ZLC) rats. Metformin treatment significantly decreased the blood glucose levels from 15.5 weeks of age. In the SZDG, Ki67 (a marker for cell proliferation)- and doublecortin (DCX, a marker for differentiated neuroblasts)-immunoreactive cells were much lower in the vehicle-treated ZDF rats than in the ZLC rats. In the metformin-treated ZDF group, Ki67- and DCX-immunoreactive cells were significantly increased in the SZDG compared to those in the vehicle-treated ZDF group. These results suggest that diabetes significantly reduces cell proliferation and neuroblast differentiation in the SZDG and that metformin treatment normalizes the reduction of cell proliferation and neuroblast differentiation in the SZDG in diabetic rats.

journal_name

Neurochem Res

journal_title

Neurochemical research

authors

Hwang IK,Kim IY,Joo EJ,Shin JH,Choi JW,Won MH,Yoon YS,Seong JK

doi

10.1007/s11064-009-0115-5

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

645-50

issue

4

eissn

0364-3190

issn

1573-6903

journal_volume

35

pub_type

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