Bcl-XL small interfering RNA enhances sensitivity of Hepg2 hepatocellular carcinoma cells to 5-fluorouracil and hydroxycamptothecin.
Acta Biochim Biophys Sin (Shanghai)
; 38(10): 704-10, 2006 Oct.
Article
en En
| MEDLINE
| ID: mdl-17033717
ABSTRACT
Changes in drug sensitivity in Bcl-XL small interfering RNA (siRNA) transfected Hepg2 hepatocellular carcinoma cells were investigated in this study. Bcl-XL siRNA and negative siRNA expression vector were constructed and stably transfected into Hepg2 cells. Reverse transcription (RT)-PCR, western blot and immunofluorescence were used to detect the target gene expression at mRNA and protein levels. Drug sensitivity of the cells to 5-fluorouracil (5-FU) and hydroxycamptothecin (HCPT) were evaluated with MTT. The Bcl-XL mRNA and protein expression levels in Bcl-XL siRNA transfectants were reduced compared with negative siRNA transfectants or mock cells. MTT results showed that Bcl-XL siRNA transfected cells have a higher cell inhibition rate than negative vector transfected cells or untreated cells after treatment with 13, 130, 1300 and 13,000 mg/L of 5-FU. Bcl-XL siRNA transfected cells also showed increased drug-sensitivity compared with negative vector transfected cells or untreated cells after treatment with 0.18, 0.36, 0.72 and 1.44 mg/L HCPT. Flow cytometry (FCM) results demonstrated that the sub-G1 population increased in the Bcl-XL siRNA group, compared with the negative siRNA group and untreated control group, after the addition of 5-FU (1300 mg/L) and HCPT (0.72 mg/L). siRNA targeting Bcl-XL gene can specifically down-regulate Bcl-XL expression in Hepg2 cells, and can increase spontaneous cell apoptosis and sensitize cells to 5-FU or HCPT.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Camptotecina
/
Carcinoma Hepatocelular
/
ARN Interferente Pequeño
/
Proteína bcl-X
/
Fluorouracilo
/
Neoplasias Hepáticas
/
Antimetabolitos Antineoplásicos
/
Antineoplásicos Fitogénicos
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Acta Biochim Biophys Sin (Shanghai)
Asunto de la revista:
BIOFISICA
/
BIOQUIMICA
Año:
2006
Tipo del documento:
Article
País de afiliación:
China