Increased insulin sensitivity and obesity resistance in mice lacking the protein tyrosine phosphatase-1B gene - PubMed (original) (raw)
Comment
. 1999 Mar 5;283(5407):1544-8.
doi: 10.1126/science.283.5407.1544.
P Payette, E Michaliszyn, W Cromlish, S Collins, A L Loy, D Normandin, A Cheng, J Himms-Hagen, C C Chan, C Ramachandran, M J Gresser, M L Tremblay, B P Kennedy
Affiliations
- PMID: 10066179
- DOI: 10.1126/science.283.5407.1544
Comment
Increased insulin sensitivity and obesity resistance in mice lacking the protein tyrosine phosphatase-1B gene
M Elchebly et al. Science. 1999.
Abstract
Protein tyrosine phosphatase-1B (PTP-1B) has been implicated in the negative regulation of insulin signaling. Disruption of the mouse homolog of the gene encoding PTP-1B yielded healthy mice that, in the fed state, had blood glucose concentrations that were slightly lower and concentrations of circulating insulin that were one-half those of their PTP-1B+/+ littermates. The enhanced insulin sensitivity of the PTP-1B-/- mice was also evident in glucose and insulin tolerance tests. The PTP-1B-/- mice showed increased phosphorylation of the insulin receptor in liver and muscle tissue after insulin injection in comparison to PTP-1B+/+ mice. On a high-fat diet, the PTP-1B-/- and PTP-1B+/- mice were resistant to weight gain and remained insulin sensitive, whereas the PTP-1B+/+ mice rapidly gained weight and became insulin resistant. These results demonstrate that PTP-1B has a major role in modulating both insulin sensitivity and fuel metabolism, thereby establishing it as a potential therapeutic target in the treatment of type 2 diabetes and obesity.
Comment on
- New clues found to diabetes and obesity.
Ferber D. Ferber D. Science. 1999 Mar 5;283(5407):1423, 1425. doi: 10.1126/science.283.5407.1423. Science. 1999. PMID: 10206863 No abstract available.
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