5-Fluorouracil combined with apigenin enhances anticancer activity through mitochondrial membrane potential (ΔΨm)-mediated apoptosis in hepatocellular carcinoma.
Clin Exp Pharmacol Physiol
; 42(2): 146-53, 2015 Feb.
Article
en En
| MEDLINE
| ID: mdl-25363523
ABSTRACT
The development of chemoresistance may reduce the efficacy of chemotherapeutic drugs for treating hepatocellular carcinoma (HCC). In the present study, the effects of apigenin on intensifying the chemosensitivity of HCC cells and an HCC xenograft model in response to 5-fluorouracil (5-FU) were investigated. Sub-toxic concentrations of apigenin (4 µmol/L) significantly enhanced the cytotoxicity of 5-FU (100 µg/mL) in HCC cells. In vivo, combined treatment with apigenin (20 mg/kg, five times/week for 3 weeks) and 5-FU (20 mg/kg for 5 consecutive days) significantly inhibited the growth of HCC xenograft tumours. Annexin V-propidium iodide dual staining assays, terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end-labelling assays and western blotting analysis were used to confirm the synergistic effects of apigenin and 5-FU on HCC apoptosis. Coincubation of HCC cells with apigenin and 5-FU increased levels of reactive oxygen species (ROS), which was followed by a decrease in the mitochondrial membrane potential (ΔΨm). In addition, combined triggered the mitochondrial apoptotic pathway, as indicated by decreased Bcl-2 expression and loss of ΔΨm, with significant activation of caspase 3 and poly(ADP-ribose) polymerase. The present study is the first to demonstrate that apigenin may potentiate the cytotoxicity of 5-FU in HCC via inhibition of ROS-mediated drug resistance and concurrent activation of the mitochondrial pathways of apoptosis.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Protocolos de Quimioterapia Combinada Antineoplásica
/
Apoptosis
/
Carcinoma Hepatocelular
/
Potencial de la Membrana Mitocondrial
/
Neoplasias Hepáticas
Límite:
Animals
/
Humans
/
Male
Idioma:
En
Año:
2015
Tipo del documento:
Article