Deregulated c-Fos/AP-1 modulates expression of the cyclin and the cdk gene in splenic B cells stimulated with lipopolysaccharide

Cancer Letters
J Phuchareon, T Tokuhisa

Abstract

Overexpression of c-Fos/AP-1 augments proliferation of splenic B cells stimulated with lipopolysaccharide (LPS). To elucidate mechanisms of the augmentation by c-Fos/AP-1, a cell cycle of the LPS-activated B cells from c-fos transgenic mice was analyzed. Cell cycle progression into the S phase was accelerated in the c-fos B cells. Expression of genes related to the cell cycle progression was examined in these B cells. Amount of cyclin D3 and cdk4 mRNA increased in the c-fos B cells at 6 h earlier than that in the control B cells, indicating that the kinetics of these mRNA expressions correlate with the acceleration of cell cycle progression. Furthermore, cyclin D1 and cyclin E mRNA were detected in the c-fos B cells but not in the control B cells. These results indicate that deregulated c-Fos/AP-1 modulates expression of the cyclin and the cdk gene in splenic B cells stimulated with LPS. These modulations may accelerate cell cycle progression and augment proliferation of the B cells.

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Citations

Oct 14, 2003·Arteriosclerosis, Thrombosis, and Vascular Biology·Angela M Taylor, Coleen A McNamara
Feb 25, 2006·The Canadian Journal of Cardiology·Thierry CharronBradley H Strauss
Mar 11, 2005·Expert Opinion on Emerging Drugs·Pierre-Frédéric KellerJean-Claude Tardif
Nov 6, 2009·Systems Biology in Reproductive Medicine·Timothy J DoyleKwan Hee Kim
Dec 4, 2003·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·Fotini DeboneraKim M Olthoff

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