Post-translational and Transcriptional Regulation of Glycolipid Glycosyltransferase Genes in Apoptotic Breast Carcinoma Cells: VII. Studied by DNA-microarray After Treatment with L-PPMP

Overview

Journal Glycoconj J

Publisher Springer

Specialties Biochemistry
Endocrinology

Date 2009 Feb 3

PMID 19184418

Citations 1

Authors

Rui Ma

N Matthew Decker

Vesta Anilus

Joseph R Moskal

Joseph Burgdorf

James R Johnson

Manju Basu

Sipra Banerjee

Subhash Basu

Affiliations

Soon will be listed here.

Abstract

Functions of glycosphingolipids on the eukaryotic cell membranes during the onset of oncogenic processes and cell death are not well understood. Inhibitors of glycosphingolipid biosynthesis were recently found to trigger apoptosis in many carcinoma including breast cancer SKBR-3, MCF-7, and MDA-468 cells through either intrinsic or extrinsic apoptotic pathways as we previously reported. These anti-cancer inhibitors could increase ceramide concentration by blocking functions of glycolipid glycosyltransferases (GLTs). In this study, using a novel fluorescent dye (ASK-0) revealed the damage of cell organelle membranes by an inhibitor of glucosylceramide biosynthesis (L-PPMP). A highly drug- and cell-dependent regulation of MAPKs was also found by cis-platin and L-PPMP when inducing apoptosis in SKBR-3, MCF-7, and MDA-468 cells. A dose and time-dependent regulation of GLTs were investigated by enzymatic assay and DNA microarray analyses. These GLTs are involved in biosynthesis of Le(X) and sialosyl-Le(X) (neolactosyl-ceramide series) such as GalT-4 (UDP-Gal: LcOse3cer beta-galactosyltransferase, GalT-5 (UDP-Gal: nLcOse4Cer alpha1, 3galactosyltransferase, FucT-3 (GDP-Fucose: LM1 alpha1, 4fucosyltransferase). A similar effect was observed with the GLTs involved in the biosyntheses of Gg-series gangliosides, such as SAT-4 (CMP-NeuAc: GgOse4Cer alpha2, 3sialyltransferase, and SAT-2 (CMP-NeuAc: GM3 alpha2, 8sialyltransferase). The glycol-related gene DNA-microarrays also suggested the transcriptional regulation of several GLTs involved in the biosynthesis of neolactosylceramide containing cell-surface antigens in these apoptotic breast carcinoma cells. In the early apoptotic stages (2 to 6 h after L-PPMP treatment) in addition to GlcT-1 gene, several genes (betaGalTs and betaGlcNAcTs) in the SA-Le(a) pathway were stimulated.

Citing Articles

Ganglioside biosynthesis in developing brains and apoptotic cancer cells: X. regulation of glyco-genes involved in GD3 and Sialyl-Lex/a syntheses.

Basu S, Ma R, Moskal J, Basu M Neurochem Res. 2012; 37(6):1245-55.

PMID: 22488330 DOI: 10.1007/s11064-012-0762-9.

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