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Intermittent injections of osteocalcin improve glucose metabolism and prevent type 2 diabetes in mice.

Abstract：

:The uncarboxylated form of the osteoblast-specific secreted molecule osteocalcin is a hormone favoring glucose handling and increasing energy expenditure. As a result, the absence of osteocalcin leads to glucose intolerance in mice, while genetically modified mice with an increase in uncarboxylated osteocalcin are protected from type 2 diabetes and obesity. Here, we tested in the mouse the therapeutic potential of intermittent administration of osteocalcin. We found that daily injections of osteocalcin at either 3 or 30 ng/g/day significantly improved glucose tolerance and insulin sensitivity in mice fed a normal diet. This was attributable, in part, to an increase in both β-cell mass and insulin secretion. When mice were fed a high-fat diet (HFD), daily injections of osteocalcin partially restored insulin sensitivity and glucose tolerance. Moreover, mice treated with intermittent osteocalcin injections displayed additional mitochondria in their skeletal muscle, had increased energy expenditure and were protected from diet-induced obesity. Finally, the hepatic steatosis induced by the HFD was completely rescued in mice receiving osteocalcin daily. Overall, these results provide evidence that daily injections of osteocalcin can improve glucose handling and prevent the development of type 2 diabetes.

journal_name

Bone

journal_title

Bone

authors

Ferron M,McKee MD,Levine RL,Ducy P,Karsenty G

doi

10.1016/j.bone.2011.04.017

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

568-75

issue

2

eissn

8756-3282

issn

1873-2763

pii

S8756-3282(11)00939-2

journal_volume

50

pub_type

杂志文章

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