Effects of carbocisteine on sialyl-Lewis x expression in an airway carcinoma cell line stimulated with tumor necrosis factor-alpha.

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Ishibashi Y, Imai S, Inouye Y, Okano T, Taniguchi A

Effects of carbocisteine on sialyl-Lewis x expression in an airway carcinoma cell line stimulated with tumor necrosis factor-alpha.

Eur J Pharmacol. 2006 Jan 20;530(3):223-8. doi: 10.1016/j.ejphar.2005.11.017. Epub 2006 Jan 4.

PubMed ID

16387297 [ View in PubMed

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Abstract

Carbocisteine is a mucoregulatory drug normalizing sialic acid and fucose contents in mucins through the regulation of glycosyltransferase activities. Tumor necrosis factor (TNF)-alpha-induced overexpression of sialyl-Lewis x epitopes, containing sialic acid and fucose, in mucins were previously reported to be regulated by glycosyltransferase mRNAs expression through phosphatidyl inositol-specific phospholipase C (PI-PLC) signaling pathways [Ishibashi, Y., Inouye, Y., Okano, T., Taniguchi, A., 2005. Regulation of sialyl-Lewis x epitope expression by TNF-alpha and EGF in an airway carcinoma cell line. Glycoconj. J. 22, 53-62]. To investigate the mechanism behind the mucoregulatory action of carbocisteine, the present study evaluated the effects of carbocisteine on TNF-alpha-induced overexpression of sialyl-Lewis x epitopes in NCI-H292 cells. 100 mug/ml of carbocisteine was able to inhibit the TNF-alpha-induced expression of hST3GallV mRNA, FUT3 mRNA, C2/4GnT mRNA and sialyl-Lewis x epitopes as well as the TNF-alpha-induced activity of PI-PLC in NCI-H292 cells. These findings suggest that carbocisteine may normalize the sialyl-Lewis x epitopes expression in mucins through the inhibition of cellular PI-PLC activity in vivo.

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Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
Carbocisteine	PI-PLC X domain-containing protein 3	Protein	Humans	Unknown	Inhibitor	Details