Analysis of the impact of extracellular acidity on the expression and activity of P-glycoprotein and on the P-glycoprotein-mediated cytotoxicity of daunorubicin in cancer cell by microfluidic chip technology / 中国医学科学院学报
Acta Academiae Medicinae Sinicae
;
(6): 75-81, 2015.
Artigo
em Inglês
| WPRIM
| ID: wpr-257677
ABSTRACT
<p><b>OBJECTIVE</b>To explore the impact of extracellular acidic environment on the expression and activity of P-glycoprotein (P-gp) and on the P-gp-mediated cytotoxicity of daunomycin in cancer cells by using microfluidic chip technology.</p><p><b>METHODS</b>The A549 cells cultured on a microfluidic chip were divided into experiment group and control group. The experiment group was exposed to an acidic cell culture medium (pH 6.6), while the control group was treated with a neutral cell culture medium (pH 7.4). The expression of P-gp was detected by cell immunofluorescense analysis and the activity of P-gp was evaluated by Rhodamine 123 efflux experiment. Meanwhile, the cytotoxicity of daunomycin was analyzed by cell live/dead fluorescence staining method.</p><p><b>RESULTS</b>Microfluidic chip designed in this study could provide a suitable microenvironment for the growth of A549 cells and the A549 cells reached the confluence of 90% after inoculation for 72 h. Treatment of the acidic cell culture media on A549 cells did not make a significant difference on the expression level of P-gp. However, the activity of P-gp was significantly enhancement and peaked at 6 h after treatment with acidic cell culture media. Meanwhile, the cytotoxicity of daunomycin reduced significantly after treatment with acidic cell culture medium for 6 h,and a reversal effect was obtained when synergy with verapamil.</p><p><b>CONCLUSIONS</b>Microfluidic chip technology can shorten the analysis time and reduce the reagent consumption. It can be used as a new technology platform for understanding the mechanisms of multi-drug resistance and for screening highly efficient multi-drug resistance reversal agents.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Daunorrubicina
/
Membro 1 da Subfamília B de Cassetes de Ligação de ATP
/
Técnicas de Cultura de Células
/
Subfamília B de Transportador de Cassetes de Ligação de ATP
/
Meios de Cultura
/
Linhagem Celular Tumoral
/
Microfluídica
/
Espaço Extracelular
/
Concentração de Íons de Hidrogênio
Limite:
Humanos
Idioma:
Inglês
Revista:
Acta Academiae Medicinae Sinicae
Ano de publicação:
2015
Tipo de documento:
Artigo
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