Related Experiment Videos
TNF inhibits insulin induced STAT5 activation in differentiated mouse muscle cells pmi28
1Institute of Cell Biology and Immunology, University of Stuttgart, Germany.
Abstract:
Tumor necrosis factor (TNF) plays a central role in the state of insulin resistance leading to type II diabetes. We here describe the crosstalk of TNF with insulin signaling cascades in the mouse muscle cell line pmi28. TNF downregulated insulin induced insulin receptor kinase activity and insulin induced activation of the transcription factor STAT5. Our results provide evidence that the inhibitory crosstalk between TNF and insulin in skeletal muscle cells comprises an interference with the expression of STAT5 regulated genes which may play an important role in the manifestation and/or progression of insulin resistance in muscle cells.
Insights
Tumor necrosis factor (TNF) inhibits insulin signaling in muscle cells, contributing to insulin resistance and type II diabetes. This study reveals TNF interferes with STAT5-regulated genes, impacting diabetes progression.
Area of Science:
- Biochemistry
- Cell Biology
- Endocrinology
Background:
- Tumor necrosis factor (TNF) is implicated in insulin resistance, a precursor to type II diabetes.
- Understanding the molecular mechanisms of TNF's interference with insulin signaling is crucial for therapeutic development.
Purpose of the Study:
- To investigate the crosstalk between TNF and insulin signaling pathways in mouse muscle cells.
- To elucidate how TNF modulates insulin receptor kinase activity and STAT5 activation.
Main Methods:
- Utilized the mouse muscle cell line pmi28 for experimental analysis.
- Assessed the impact of TNF on insulin-induced insulin receptor kinase activity.
- Evaluated the effect of TNF on the activation of the transcription factor STAT5.
Main Results:
- TNF significantly downregulated insulin-induced insulin receptor kinase activity.
- TNF inhibited the insulin-induced activation of the transcription factor STAT5.
- Evidence suggests TNF interferes with the expression of STAT5-regulated genes in muscle cells.
Conclusions:
- The inhibitory crosstalk between TNF and insulin in skeletal muscle involves interference with STAT5-regulated gene expression.
- This interaction may be a key factor in the development and progression of insulin resistance in muscle.
- Further research into this pathway could offer new targets for managing type II diabetes.