Bisdemethoxycurcumin sensitizes cisplatin-resistant lung cancer cells to chemotherapy by inhibition of CA916798 and PI3K/AKT signaling.
Apoptosis
; 22(9): 1157-1168, 2017 Sep.
Article
em En
| MEDLINE
| ID: mdl-28677094
ABSTRACT
Curcumin, a dietary supplement or herbal medicine from Curcuma longa, has shown antitumor activity in different cancer cell lines and clinical trials. CA916798, a novel protein, is overexpressed in multidrug-resistant tumor cells. This study aimed to assess the effects of curcumin on regulating chemosensitivity in cisplatin-resistant non-small cell lung cancer (NSCLC) cells in vitro and to explore the underlying molecular mechanisms. Human cisplatin-sensitive A549 and cisplatin-resistant A549/CDDP lung adenocarcinoma cells were treated with curcumin to assess cell viability and gene modulations using quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and western blotting. CA916798 shRNA and point mutations were used to assess the CA916798 functions and phosphorylation sites. Bisdemethoxycurcumin sensitized cisplatin-resistant lung cancer cells to various chemotherapeutic agents, including cisplatin. Bisdemethoxycurcumin reduced the levels of CA916798 mRNA and protein in A549 and A549/CDDP cells, while it also suppressed phosphatidylinositol-3-kinase (PI3K)/AKT signaling. CA916798, as a downstream gene, interacted with AKT after bisdemethoxycurcumin treatment in A549 and A549/CDDP cells. Moreover, A549/CDDP cells expressing the point-mutated CA916798-S20D protein were more resistant to cisplatin and bisdemethoxycurcumin, whereas tumor cells expressing CA916798-S20A, CA916798-S31A, CA916798-S60A, CA916798-S93A, or CA916798-T97A (different sites of amino acid phosphorylation) showed similar sensitivity or resistance to cisplatin and bisdemethoxycurcumin, compared with the control cells. Bisdemethoxycurcumin is able to sensitize cisplatin-resistant NSCLC cells to chemotherapeutic agents by inhibition of CA916798 and PI3K/AKT activities. Moreover, phosphorylation of CA916798 at the S20 residue plays a critical role in mediating bisdemethoxycurcumin antitumor activity.
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Bases de dados:
MEDLINE
Assunto principal:
Adenocarcinoma
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Transdução de Sinais
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Carcinoma Pulmonar de Células não Pequenas
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Resistencia a Medicamentos Antineoplásicos
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Curcumina
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Neoplasias Pulmonares
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Proteínas de Neoplasias
Limite:
Animals
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Humans
Idioma:
En
Revista:
Apoptosis
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
China