Inhibition of histone deacetylase 3 protects beta cells from cytokine-induced apoptosis.
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Abstract | Cytokine-induced beta-cell apoptosis is important to the etiology of type-1 diabetes. Although previous reports have shown that general inhibitors of histone deacetylase (HDAC) activity, such as suberoylanilide hydroxamic acid and trichostatin A, can partially prevent beta-cell death, they do not fully restore beta-cell function. To understand HDAC isoform selectivity in beta cells, we measured the cellular effects of 11 structurally diverse HDAC inhibitors on cytokine-induced apoptosis in the rat INS-1E cell line. All 11 compounds restored ATP levels and reduced nitrite secretion. However, caspase-3 activity was reduced only by MS-275 and CI-994, both of which target HDAC1, 2, and 3. Importantly, both MS-275 and genetic knockdown of Hdac3 alone were sufficient to restore glucose-stimulated insulin secretion in the presence of cytokines. These results suggest that HDAC3-selective inhibitors may be effective in preventing cytokine-induced beta-cell apoptosis. |
Year of Publication | 2012
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Journal | Chem Biol
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Volume | 19
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Issue | 6
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Pages | 669-73
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Date Published | 2012 Jun 22
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ISSN | 1879-1301
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DOI | 10.1016/j.chembiol.2012.05.010
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PubMed ID | 22726680
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PubMed Central ID | PMC3383610
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Grant list | DP2 DK083048 / DK / NIDDK NIH HHS / United States
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