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Anti-(insulin Receptor) Monoclonal Antibody-stimulated Tyrosine Phosphorylation in Cells Transfected with Human Insulin Receptor CDNA

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Journal Biochem J
Specialty Biochemistry
Date 1990 Jun 15
PMID 1694662
Citations 4
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Abstract

The effects of insulin and anti-(insulin receptor) monoclonal antibodies on tyrosine phosphorylation were investigated in fibroblasts transfected with human insulin receptor cDNA (NIH 3T3HIR3.5 cells) using anti-phosphotyrosine immunoblotting. Insulin increased levels of tyrosine phosphorylation in two major proteins of molecular mass 97 kDa (pp97, assumed to be the insulin receptor beta-subunit) and 185 kDa (pp185). Insulin-mimetic anti-receptor antibodies also stimulated tyrosine phosphorylation of both pp97 and pp185. The observation of antibody-stimulated pp97 phosphorylation, as detected by immunoblotting, is in contrast with previous data which failed to show receptor autophosphorylation in NIH 3T3HIR3.5 cells labelled with [32P]P1. The effect of insulin on pp97 was maximal within 1 min, but the response to antibody was apparent only after a lag of 1-2 min and rose steadily over 20 min. The absolute level of antibody-stimulated phosphorylation of both pp97 and pp185 after 20 min was only about 20% of the maximum level induced by equivalent concentrations of insulin, even at concentrations of antibody sufficient for full occupancy of receptors. Another insulin-mimetic agent, wheat-germ agglutinin, stimulated receptor autophosphorylation with kinetics similar to those produced by the antibody. It is suggested that the relatively slow responses to both agents may be a function of the dependence on receptor cross-linking. These data are consistent with a role for the insulin receptor tyrosine kinase activity in the mechanism of action of insulin-mimetic anti-receptor antibodies.

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References
1.
Ponzio G, Contreres J, Debant A, Baron V, Gautier N, Rossi B . Use of an anti-insulin receptor antibody to discriminate between metabolic and mitogenic effects of insulin: correlation with receptor autophosphorylation. EMBO J. 1988; 7(13):4111-7. PMC: 455120. DOI: 10.1002/j.1460-2075.1988.tb03305.x. View

2.
Kahn C, Baird K, Jarrett D, Flier J . Direct demonstration that receptor crosslinking or aggregation is important in insulin action. Proc Natl Acad Sci U S A. 1978; 75(9):4209-13. PMC: 336081. DOI: 10.1073/pnas.75.9.4209. View

3.
Debant A, Ponzio G, Clauser E, Contreres J, Rossi B . Receptor cross-linking restores an insulin metabolic effect altered by mutation on tyrosine 1162 and tyrosine 1163. Biochemistry. 1989; 28(1):14-7. DOI: 10.1021/bi00427a003. View

4.
Zick Y . The insulin receptor: structure and function. Crit Rev Biochem Mol Biol. 1989; 24(3):217-69. DOI: 10.3109/10409238909082554. View

5.
Hawley D, Maddux B, Patel R, Wong K, Mamula P, Firestone G . Insulin receptor monoclonal antibodies that mimic insulin action without activating tyrosine kinase. J Biol Chem. 1989; 264(5):2438-44. View