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- W2170510081 abstract "Latent membrane protein 2A (LMP2A) blocks B-cell receptor signal transduction in vitro by binding the Syk and Lyn protein tyrosine kinases. As well as blocking B-cell signal transduction, LMP2A has been shown to activate the phosphatidylinositol 3-kinase (PI3-K)/Akt pathway, which acts as a survival signal in both B cells and epithelial cells. Transforming growth factor beta 1 (TGF-beta 1) is a multifunctional cytokine that plays important roles in regulating cell growth and differentiation in many biological systems. The loss of the growth-inhibitory response to the TGF-beta 1 signal is found in many cancers and is widely thought to promote tumor development. In this study, we found that LMP2A induced the phosphorylation of Akt (serine 473) in Burkitt's lymphoma cell line Ramos and in gastric carcinoma cell line HSC-39 and partially enhanced cell viability following TGF-beta 1 treatment. In addition, LMP2A partially inhibited TGF-beta 1-induced DNA fragmentation and cleavage of poly(ADP-ribose) polymerase (PARP). In the presence of LY294002, an inhibitor of PI3-K, the LMP2A-mediated inhibitory effects on TGF-beta 1-induced DNA fragmentation and cleavage of PARP were alleviated. Furthermore, LMP2A did not alter the levels of expression of type I and type II TGF-beta 1 receptors. Taken together, these results suggest that LMP2A may inhibit TGF-beta 1-mediated apoptosis through activation of the PI3-K/Akt pathway." @default.
- W2170510081 created "2016-06-24" @default.
- W2170510081 creator A5008892117 @default.
- W2170510081 creator A5009157428 @default.
- W2170510081 date "2004-02-15" @default.
- W2170510081 modified "2023-10-14" @default.
- W2170510081 title "Latent Membrane Protein 2A Inhibits Transforming Growth Factor-β1-Induced Apoptosis through the Phosphatidylinositol 3-Kinase/Akt Pathway" @default.
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- W2170510081 doi "https://doi.org/10.1128/jvi.78.4.1697-1705.2004" @default.
- W2170510081 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/369507" @default.
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