[Effect of hydroxycamptothecin (HCPT) on proliferation and apoptosis of rat hepatic stellate cells].
OBJECTIVE
To investigate the effects of hydroxycamptothecin (HCPT) on proliferation and apoptosis of rat hepatic stellate cells (HSC).


METHODS
Rat HSC line (HSC-T6) and rat hepatocyte line (BRL-3A) were treated with different concentrations of HCPT (0, 0.008, 0.016, 0.031, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32 mg/L respectively) for 24 h. Cell proliferation was assessed by MTT colorimetric assay, apoptosis was detected with PI staging followed by flow cytometry, and by DNA ladder assay. The morphological change of apoptosis was observed under transmission electron microscopy (TEM).


RESULTS
MTT assay indicated that HCPT significantly inhibited the proliferation of HSC-T6 and BRL-3A in a dose-dependent manner. 24 h after the treatment with different concentrations of HCPT (0.25, 0.5, 1 mg/L), the apoptosis rate (13.46%+/-2.42%, 26.25%+/-5.65%, 47.05%+/-8.76%, respectively) in HSC-T6 was significantly higher than that in control cells (4.89%+/-1.80%, F = 34.24, P less than 0.01). 24 h after 0.5 mg/L HCPT treatment, cell shrinkage, nucleoli disappearance, chromatin condensation were found under TEM, and DNA ladder was demonstrated by agarose gel electrophoresis.


CONCLUSIONS
HCPT could significantly inhibit proliferation and induce apoptosis of HSC-T6 in a dose-dependent manner.
Zhang
Yi
Y
Department of Infectious Diseases, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China.
Deng
Qun
Q
Hu
Guo-Xin
GX
Yuan
Keng
K
Yuan
Fang
F
Huang
Yan-Qin
YQ
D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D002166:Camptothecin / Q000031:analogs & derivatives* / Q000494:pharmacology; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects*; D055166:Hepatic Stellate Cells / Q000187:drug effects*; D051381:Rats
C120029:homocamptothecin; D002166:Camptothecin