Tetrandrine induces apoptosis in hepatic stellate cells.
We have previously reported that tetrandrine reduced hepatic stellate cell activation and collagen accumulation in liver fibrosis induced by biliary obstruction. In the present study, we examined the apoptosis-inducing effect of tetrandrine on activated hepatic stellate cells, as the therapeutic goal in hepatic fibrosis is to eliminate the activated hepatic stellate cells by apoptosis. We used rat hepatic stellate cells transformed by Simian virus 40 (T-HSC/Cl-6) to overcome the limitations inherent in studying primary cultures of hepatic stellate cells. Tetrandrine treatment at doses of 25 and 50 microg/ml for 12 h induced apoptosis as confirmed by DNA fragmentation and increased sub-G1 DNA content as detected by flow cytometric analysis. Tetrandrine also induced the activation of caspase-3 protease and subsequent proteolytic cleavage of poly(ADP-ribose) polymerase. In conclusion, our results demonstrate that tetrandrine induces apoptosis of T-HSC/Cl-6 cells, and these results should contribute to the development of new agents for the treatment of hepatic fibrosis.
Zhao
Yu-Zhe
YZ
Medicinal Resources Research Center, Wonkwang University, Iksan, Jeonbuk, South-Korea.
Kim
Ji-Young
JY
Park
Eun-Jeon
EJ
Lee
Sung Hee
SH
Woo
Sun-Wook
SW
Ko
Geonil
G
Sohn
Dong Hwan
DH
D000470:Alkaloids / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D044182:Benzylisoquinolines / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D020169:Caspases / Q000378:metabolism; D002478:Cells, Cultured / Q000187:drug effects; D053938:DNA Fragmentation; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D005434:Flow Cytometry; D008099:Liver / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology; D008103:Liver Cirrhosis / Q000188:drug therapy; D008517:Phytotherapy; D011065:Poly(ADP-ribose) Polymerases / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D031609:Stephania tetrandra
D000470:Alkaloids; D044182:Benzylisoquinolines; D004365:Drugs, Chinese Herbal; C009438:tetrandrine; D011065:Poly(ADP-ribose) Polymerases; D020169:Caspases