Abstract:
:To determine the role of the endoplasmic reticulum (ER) in diabetes, Akita mice, a mouse model of type 2 diabetes, were mated with either heterozygous knockout mice or two types of transgenic mice of 150-kDa oxygen-regulated protein (ORP150), a molecular chaperone located in the ER. Systemic expression of ORP150 in Akita mice improves insulin intolerance, whereas the exclusive overexpression of ORP150 in pancreatic beta-cells of Akita mice did not change their glucose tolerance. Both an insulin tolerance test and hyperinsulinemic-euglycemic clamp revealed that ORP150 enhanced glucose uptake, accompanied by suppression of oxidized protein. Furthermore, ORP150 enhanced the insulin sensitivity of myoblast cells treated with hydrogen peroxide. These data suggest that ORP150 plays an important role in insulin sensitivity and is a potential target for the treatment of diabetes.
journal_name
Diabetesjournal_title
Diabetesauthors
Ozawa K,Miyazaki M,Matsuhisa M,Takano K,Nakatani Y,Hatazaki M,Tamatani T,Yamagata K,Miyagawa J,Kitao Y,Hori O,Yamasaki Y,Ogawa Sdoi
10.2337/diabetes.54.3.657subject
Has Abstractpub_date
2005-03-01 00:00:00pages
657-63issue
3eissn
0012-1797issn
1939-327Xpii
54/3/657journal_volume
54pub_type
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