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p38/SAPK2-dependent gene expression in Jurkat T cells
M Rolli-Derkinderen1, M Gaestel
1Innovationskolleg Zellspezialisierung der Martin-Luther-Universität Halle/Wittenberg, Halle, Germany.
Biological Chemistry
|April 27, 2000
Summary
The p38/SAPK2 protein kinase regulates gene expression. This study identified key genes, including transcription factors and growth-related genes, controlled by p38/SAPK2 activity in human T cells.
Area of Science:
- Molecular Biology
- Cell Signaling
- Gene Regulation
Background:
- The stress-activated protein kinase p38/SAPK2 modulates transcription factor activity.
- p38/SAPK2 influences gene expression at transcriptional and post-transcriptional levels.
- Understanding p38/SAPK2 targets is crucial for stress response mechanisms.
Purpose of the Study:
- To identify genes regulated by p38/SAPK2 activity.
- To compare gene expression profiles in activated versus inhibited p38/SAPK2 conditions.
- To elucidate the role of p38/SAPK2 in cellular stress responses.
Main Methods:
- Utilized a gene expression array to analyze mRNA levels of 588 genes.
- Compared gene expression in human Jurkat T cells with anisomycin-activated p38/SAPK2 versus SB203580-inhibited p38/SAPK2.
- Confirmed expression changes for selected genes using Northern blot analysis.
Main Results:
- p38/SAPK2 activation upregulated genes such as c-jun, fra-1, gadd153, and egr-1.
- Downregulated genes included insulin receptor (IR), grb2, c-myc, and dad-1.
- Northern blot analysis validated the complex, stress-induced regulation of six key genes.
Conclusions:
- p38/SAPK2 plays a significant role in controlling the expression of a diverse set of genes under stress.
- The identified genes are involved in various cellular processes, including transcription, growth, and apoptosis.
- Further investigation is warranted to fully understand the intricate regulatory network governed by p38/SAPK2.