期刊
AMERICAN JOURNAL OF PHYSIOLOGY-ENDOCRINOLOGY AND METABOLISM
卷 278, 期 1, 页码 E127-E133出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajpendo.2000.278.1.E127
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资金
- NIDDK NIH HHS [DK-48216] Funding Source: Medline
- NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [R01DK048216] Funding Source: NIH RePORTER
The insulin receptor substrates (IRSs) function in insulin signaling. Four members of the family, IRS-1 through IRS-4, are known. Previously, mice with targeted disruption of the genes for IRS-1, -2, and -3 have been characterized. To examine the physiological role of IRS-4, we have generated and characterized mice lacking IRS-4. Male IRS-4-null mice were similar to 10% smaller in size than wild-type male mice at 9 wk of age and beyond, whereas the female null mice were of normal size. Breeding pairs of IRS-4-null mice reproduced less well than wild-type mice. IRS-4-null mice exhibited slightly lower blood glucose concentration than the wild-type mice in both the fasted and fed states, but the plasma insulin concentrations of the IRS-4-null mice in the fasted and fed states were normal. IRS-4-null mice also showed a slightly impaired response in the oral glucose tolerance test. Thus the absence of IRS-4 caused mild defects in growth, reproduction, and glucose homeostasis.
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