Cytotoxic activity of the histone deacetylase 3-Selective inhibitor Pojamide on MDA-MB-231 triple-negative breast cancer cells

Luparello, Claudio, Asaro, Dalia Maria Lucia, Cruciata, Ilenia, Hassell-Hart, Storm, Sansook, Supojjanee, Spencer, John and Caradonna, Fabio (2019) Cytotoxic activity of the histone deacetylase 3-Selective inhibitor Pojamide on MDA-MB-231 triple-negative breast cancer cells. International Journal of Molecular Sciences, 20 (4). 804 1-14. ISSN 1661-6596

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We examined the effects of the ferrocene-based histone deacetylase-3 inhibitor Pojamide (N1-(2-aminophenyl)-N8-ferrocenyloctanediamide) and its two derivatives N1-(2-aminophenyl)-N6-ferrocenyladipamide and N1-(2-aminophenyl)-N8-ferroceniumoctanediamide tetrafluoroborate on triple-negative MDA-MB-231 breast cancer cells. Viability/growth assays indicated that only the first two compounds at 70 μM concentration caused an approximate halving of cell number after 24 h of exposure, whereas the tetrafluoroborate derivative exerted no effect on cell survival nor proliferation. Flow cytometric and protein blot analyses were performed on cells exposed to both Pojamide and the ferrocenyladipamide derivative to evaluate cell cycle distribution, apoptosis/autophagy modulation, and mitochondrial metabolic state in order to assess the cellular basis of the cytotoxic effect. The data obtained show that the cytotoxic effect of the two deacetylase inhibitors may be ascribed to the onset of non-apoptotic cell death conceivably linked to a down-regulation of autophagic processes and an impairment of mitochondrial function with an increase in intracellular reactive oxygen species. Our work expands the list of autophagy-regulating drugs and also provides a further example of the role played by the inhibition of autophagy in breast cancer cell death. Moreover, the compounds studied may represent attractive and promising targets for subsequent molecular modeling for anti-neoplastic agents in malignant breast cancer.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science
Q Science > QD Chemistry
Q Science > QD Chemistry > QD0146 Inorganic chemistry
Q Science > QD Chemistry > QD0901 Crystallography
Depositing User: John Spencer
Date Deposited: 18 Feb 2019 09:11
Last Modified: 18 Feb 2019 09:11

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Project NameSussex Project NumberFunderFunder Ref
Poised Fragment Libraries for Atypical Bromodomain InhibitionUnsetEPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/P026990/1