PMID- 10644546 OWN - NLM STAT- MEDLINE DCOM- 20000306 LR - 20171213 IS - 0193-1849 (Print) IS - 0193-1849 (Linking) VI - 278 IP - 1 DP - 2000 Jan TI - Mice lacking insulin receptor substrate 4 exhibit mild defects in growth, reproduction, and glucose homeostasis. PG - E127-33 AB - 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 approximately 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. FAU - Fantin, V R AU - Fantin VR AD - Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755, USA. FAU - Wang, Q AU - Wang Q FAU - Lienhard, G E AU - Lienhard GE FAU - Keller, S R AU - Keller SR LA - eng GR - DK-48216/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Physiol Endocrinol Metab JT - American journal of physiology. Endocrinology and metabolism JID - 100901226 RN - 0 (Blood Glucose) RN - 0 (Insulin) RN - 0 (Insulin Receptor Substrate Proteins) RN - 0 (Irs4 protein, mouse) RN - 0 (Phosphoproteins) SB - IM MH - Animals MH - Blood Glucose/*metabolism MH - Female MH - Glucose Tolerance Test MH - Growth/physiology MH - Homeostasis/physiology MH - Insulin/blood/physiology MH - Insulin Receptor Substrate Proteins MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, Knockout/genetics/*growth & development/*physiology MH - Phosphoproteins/genetics/*physiology MH - Reproduction/*physiology EDAT- 2000/01/25 09:00 MHDA- 2000/03/11 09:00 CRDT- 2000/01/25 09:00 PHST- 2000/01/25 09:00 [pubmed] PHST- 2000/03/11 09:00 [medline] PHST- 2000/01/25 09:00 [entrez] AID - 10.1152/ajpendo.2000.278.1.E127 [doi] PST - ppublish SO - Am J Physiol Endocrinol Metab. 2000 Jan;278(1):E127-33. doi: 10.1152/ajpendo.2000.278.1.E127.