Journal article

Sodium butyrate-induced differentiation of human LIM2537 colon cancer cells decreases GSK-3 beta activity and increases levels of both membrane-bound and APC/Axin/GSK-3 beta complex-associated pools of beta-catenin

E Vincan, CSF Leet, NI Reyes, RJ Dilley, RJS Thomas, WA Phillips

ONCOLOGY RESEARCH | COGNIZANT COMMUNICATION CORP | Published : 2000

Abstract

Analysis of the glycogen synthase kinase-3beta (GSK-33) activity in several colon cancer cell lines suggested a correlation between comparatively low enzyme activity and moderate to high differentiation status. Treatment of LIM2537 cells, a poorly differentiated colon cancer cell line, with the potent differentiating agent sodium butyrate resulted in 34% reduction in GSK-3beta activity in the treated cells (P < 0.028, n = 3). Decreases in GSK-3beta activity were paralleled by stabilization of cytoplasmic beta-catenin, a hallmark of Wnt signaling. However, in contrast to Wnt signaling, expression of the beta-catenin/ TCF target genes c-myc and cyclin D1 did not appear to be increased in the s..

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