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- W1978457328 abstract "Abnormalities in smooth muscle cell (SMC) proliferation and differentiation underlie the pathogenesis of proliferative vascular diseases. MDA-7 (HUGO approved symbol IL24) is a unique gene, originally identified as a tumor suppressor and more recently shown to have cytokine activity. MDA-7/IL24 has been implicated in apoptosis and cellular differentiation in tumor cells and in tumor invasion/metastasis in clinical specimens-properties central to SMC remodeling during proliferative vascular diseases. In this study, we evaluated the effects of overexpressing MDA-7/IL24 in various SMC: the apparently normal rat PAC1 cell line, primary human coronary artery SMC, and normal rat aortic SMC. We transduced SMC with adenovirus-mda7 (Ad-mda7) or control virus (Ad-Luc) and assessed cell viability, apoptosis, and migration. Ad-mda7 suppressed PAC1 cell growth in a dose-dependent manner while having no effect on normal primary human coronary artery cells or rat aortic SMC, despite strong expression of the MDA-7 transgene in all SMC. Similarly, Ad-mda7 treatment induced apoptosis in PAC1 cells with essentially no effect on normal coronary and rat aortic SMC. Ad-mda7 also inhibited serum-stimulated PAC1 cell migration. Karyotype analysis of PAC1 cells revealed that they exhibit multiple chromosomal aberrations. Importantly, recombinant MDA-7 did not elicit cell death or STAT-3 activation in PAC1 SMC, suggesting that the effects of Ad-mda7 were mediated through an intracellular pathway. These data demonstrate that Ad-mda7 exhibits selectivity in apoptosis induction and growth suppression in an atypical SMC line, raising new questions pertaining to heterogeneity in SMC death susceptibility." @default.
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- W1978457328 date "2003-08-01" @default.
- W1978457328 modified "2023-09-23" @default.
- W1978457328 title "Tumor suppressor MDA-7/IL-24 selectively inhibits vascular smooth muscle cell growth and migration" @default.
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- W1978457328 doi "https://doi.org/10.1016/s1525-0016(03)00176-x" @default.
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