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Loss of insulin signaling in hepatocytes leads to severe insulin resistance and progressive hepatic dysfunction.

Abstract：

:The liver plays a central role in the control of glucose homeostasis and is subject to complex regulation by substrates, insulin, and other hormones. To investigate the effect of the loss of direct insulin action in liver, we have used the Cre-loxP system to inactivate the insulin receptor gene in hepatocytes. Liver-specific insulin receptor knockout (LIRKO) mice exhibit dramatic insulin resistance, severe glucose intolerance, and a failure of insulin to suppress hepatic glucose production and to regulate hepatic gene expression. These alterations are paralleled by marked hyperinsulinemia due to a combination of increased insulin secretion and decreased insulin clearance. With aging, the LIRKO liver exhibits morphological and functional changes, and the metabolic phenotype becomes less severe. Thus, insulin signaling in liver is critical in regulating glucose homeostasis and maintaining normal hepatic function.

journal_name

Mol Cell

journal_title

Molecular cell

authors

Michael MD,Kulkarni RN,Postic C,Previs SF,Shulman GI,Magnuson MA,Kahn CR

subject

Has Abstract

pub_date

2000-07-01 00:00:00

pages

87-97

issue

1

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(05)00015-8

journal_volume

6

pub_type

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