Abstract:
AIM:To investigate the effects of adeno-associated virus (AAV) mediated expression of human interferon-gamma for gene therapy in experimental hepatic fibrosis in vitro and in vivo. METHODS:We constructed the recombinant AAV encoding human INF-gamma (rAAV- INF-gamma) and took the primary rat hepatic stellate cells and carbon tetrachloride induced rats as the experimental hepatic fibrosis model in vitro and in vivo. Immunocytochemistry analysis was used to reveal the expression of alpha-SMA, the marker protein expressed in hepatic stellate cells. The mRNA expression of TGF-beta, TIMP-1, and MMP-13 were analyzed by RT-PCR method. In vivo study, the hydroxyproline content in liver and serum AST, ALT were also detected. RESULTS:In vitro study, AAV vector could mediated efficient expression of human INF-gamma, which inhibit the activation of hepatic stellate cells, decrease the expression of alpha-SMA and mRNA of TIMP-1, TGF-beta, with the MMP-13 unchanged. In vivo study, the histological examination revealed that rAAV- INF-gamma could inhibit the progression of the hepatic fibrosis. In the rAAV-INF-gamma induced group, the hydroxyproline content and serum AST, ALT level were decreased to 177+/-28 microg/g wet liver, 668.5+/-140.0, 458.4+/-123.5 U/L, compare with the fibrosis control group 236+/-31 microg/g wet liver, 1 019.1+/-276.3, 770.5+/-154.3 U/L, respectively (P<0.01). mRNA expression of TIMP-1 in the rAAV-INF-gamma induced rat liver was decreased while no significant change was observed in TGF-beta and MMP-13. CONCLUSION:All these results indicated that rAAV-INF-gamma has potential effects for gene therapy of hepatic fibrosis, which could inhibit the progression of hepatic fibrosis.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Chen M,Wang GJ,Diao Y,Xu RA,Xie HT,Li XY,Sun JGdoi
10.3748/wjg.v11.i26.4045keywords:
subject
Has Abstractpub_date
2005-07-14 00:00:00pages
4045-51issue
26eissn
1007-9327issn
2219-2840journal_volume
11pub_type
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