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  • Title: Suberoyl bis-hydroxamic acid induces p53-dependent apoptosis of MCF-7 breast cancer cells.
    Author: Zhuang ZG, Fei F, Chen Y, Jin W.
    Journal: Acta Pharmacol Sin; 2008 Dec; 29(12):1459-66. PubMed ID: 19026165.
    Abstract:
    AIM: To study the effects of suberoyl bis-hydroxamic acid (SBHA), an inhibitor of histone deacetylases, on the apoptosis of MCF-7 breast cancer cells. METHODS: Apoptosis in MCF-7 cells induced by SBHA was demonstrated by flow cytometric analysis, morphological observation, and DNA ladder. Mitochondrial membrane potential (DeltaPsim) was measured using the fluorescent probe JC-1. The expressions of p53, p21, Bax, and PUMA were determined using RT-PCR or Western blotting analysis after the MCF-7 cells were treated with SBHA or p53 siRNA. RESULTS: SBHA induced apoptosis in MCF-7 cells. The expressions of p53, p21, Bax, and PUMA were induced, and DeltaPsim collapsed after treatment with SBHA. p53 siRNA abrogated the SBHA-induced apoptosis and the expressions of p53, p21, Bax, and PUMA. CONCLUSION: The activation of the p53 pathway is involved in SBHA-induced apoptosis in MCF-7 cells.
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