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2016 ; 7
(40
): 65721-65731
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Superior anti-tumor efficacy of diisopropylamine dichloroacetate compared with
dichloroacetate in a subcutaneous transplantation breast tumor model
#MMPMID27582548
Su L
; Zhang H
; Yan C
; Chen A
; Meng G
; Wei J
; Yu D
; Ding Y
Oncotarget
2016[Oct]; 7
(40
): 65721-65731
PMID27582548
show ga
Dichloroacetate (DCA), an inhibitor of pyruvate dehydrogenase kinase, has
anti-tumor properties in various carcinoma models. Diisopropylamine
dichloroacetate (DADA), an over-the-counter drug for chronic liver disease, is a
derivative of DCA. To date, few studies have evaluated the anticancer potential
of DADA in breast cancer. In this study, MDA-MB-231 cells, a breast
adenocarcinoma cell line, were used in in vitro and in vivo experiments to
evaluate the anti-tumor efficacy of DADA and DCA. The half maximal inhibitory
concentration (IC50) of DADA (7.1 ± 1.1 mmol/L) against MDA-MB-231 cells was
significantly lower than that of DCA (15.6 ± 2.0 mmol/L); 100 mg/kg (0.0004
mol/kg) DADA was better than 100 mg/kg (0.0008 mol/kg) DCA at suppressing the
growth of subcutaneous transplantation breast tumor at the same dose after 24
days intervention. Histological examination showed that both DCA and DADA
interventions led to necrosis, inflammation, and fibrosis of tumor tissue in a
mouse subcutaneous transplantation breast tumor model. DADA treatment inhibited
Ki67 expression in tumor tissue. In vitro experiments showed that DADA could
inhibit lactic acid production and glucose uptake in MDA-MB-231 cells at 10
mmol/L and these effects were stronger than DCA. DADA administration also induced
complete autophagy during early treatment stages and incomplete autophagy and
cell death at later treatment stages. In conclusion, DADA showed better
anti-tumor efficacy than DCA in a breast cancer model.