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Title

Retinoic acid and 1,25-dihydroxyvitamin D3 inhibit tenascin-C expression in rat glioma C6 cells

AuthorsÁlvarez-Dolado, Manuel ; González-Sancho, José Manuel ; Navarro-Yubero, Cristina; García-Fernández, Luis F. ; Muñoz Terol, Alberto
Issue Date1999
PublisherWiley-Blackwell
CitationJournal of Neuroscience Research 58(2): 293-300 (1999)
AbstractTenascin-C (Tn-C) is an extracellular matrix protein with growth-, invasive-, and angiogenesis-promoting activities. Tn-C is upregulated during wound healing, tumorigenesis, and other pathological conditions. Highly malignant gliomas with poor prognosis exhibit high levels of Tn-C expression. Here we demonstrate that Tn-C RNA expression in glioma C6 cells is inhibited in a dose-dependent manner by retinoic acid (RA) and 1,25-dihydroxyvitamin D3 (1,25-D3). No additive or synergistic effects were found. Inhibition is maximum 24 hr after RA or 1,25-D3 treatment, prior to a delayed cytotoxic effect starting at day 4-5 of treatment, and correlates with a reduction in the synthesis of Tn-C protein. Tn-C expression is also inhibited, but to a lesser extend by prostaglandin D2 (PGD2). Furthermore, both RA and 1,25-D3, but not PGD2 abolish the induction of Tn-C by the tumor promoter 12-O- tetradecanoyl phorbol 13-acetate. The inhibition of Tn-C expression might be relevant for the anti-cancer activity of RA and 1,25-D3.
URIhttp://hdl.handle.net/10261/79616
DOI10.1002/(SICI)1097-4547(19991015)58:2<293::AID-JNR9>3.0.CO;2-H
Identifiersdoi: 10.1002/(SICI)1097-4547(19991015)58:2<293::AID-JNR9>3.0.CO;2-H
issn: 0360-4012
e-issn: 1097-4547
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