Butyrate induces sLex synthesis by stimulation of selective glycosyltransferase genes.

Sialyl Lewis(x) (sLe(x)) is an important tumor-associated carbohydrate antigen present on the cell surface glycoconjugates involved in leukocyte migration and cancer metastasis. We report the formation of sLe(x) epitope in butyrate-treated human pancreatic adenocarcinoma cells expressing MUC1 and core 2 N-acetylglucosaminyltransferase (C2GnT). Butyrate treatment stimulates not only the transgene but also a group of endogenous glycosyltransferase genes involved in the synthesis of sLe(x). Current finding raises a concern about the proposed use of butyrate as a cancer therapeutic agent.