Format

Send to

Choose Destination
Diabetes. 1994 Nov;43(11):1271-8.

Tumor necrosis factor alpha: a key component of the obesity-diabetes link.

Author information

1
Dana-Farber Cancer Institute, Boston, Massachusetts 02115.

Abstract

Recent data have suggested a key role for tumor necrosis factor (TNF)-alpha in the insulin resistance of obesity and non-insulin-dependent diabetes mellitus (NIDDM). TNF-alpha expression is elevated in the adipose tissue of multiple experimental models of obesity. Neutralization of TNF-alpha in one of these models improves insulin sensitivity by increasing the activity of the insulin receptor tyrosine kinase, specifically in muscle and fat tissues. On a cellular level, TNF-alpha is a potent inhibitor of the insulin-stimulated tyrosine phosphorylations on the beta-chain of the insulin receptor and insulin receptor substrate-1, suggesting a defect at or near the tyrosine kinase activity of the insulin receptor. Given the clear link between obesity, insulin resistance, and diabetes, these results strongly suggest that TNF-alpha may play a crucial role in the systemic insulin resistance of NIDDM. This may allow for new treatments of disorders involving resistance to insulin.

PMID:
7926300
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center