Studies on Synthesis and Degradation of Collagen at Transcription Level in Liver Fibrosis of Rabbits with Schistosomiasis japonica
- VernacularTitle:日本血吸虫病兔肝纤维化胶原合成与降解转录水平的研究
- Author:
Feng CHEN
;
Weimin CAI
;
Zhi CHEN
;
Ronghua LIU
- Publication Type:Journal Article
- Keywords:
schistosomiasis japonica, liver fibrosis, collagenase, mRNA, RT\|PCR
- From:
Chinese Journal of Parasitology and Parasitic Diseases
1987;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the synthesis and degradation of collagen at the transcription level during liver fibrosis in rabbits with schistosomiasis japonica. Methods New Zealand rabbits infected with Schistosoma japonicum cercariae were served as animal models of liver fibrosis. The liver specimens were collected through operations at 4, 6, 8, 10, 12, 16, 20, 24 and 28 weeks after infection. TypeⅠcollagen, type Ⅲ collagen, type Ⅳ collagen, MMP\|1 and MMP\|9 mRNA levels of liver tissue were detected by RT\|PCR plus dot blotting, and the size of egg granulomas and the degree of liver fibrosis were measured by histopathological examinations. Results TypeⅠcollagen, type Ⅲ collagen, type Ⅳ collagen, MMP\|1 and MMP\|9 mRNA levels increased simultaneously in the early stage after the infection, mostly reaching their peaks at 10 weeks after infection. Compared with normal controls, type Ⅰ collagen, type Ⅲ collagen, type Ⅳ collagen, MMP\|1 and MMP\|9 mRNA levels increased by 12\^0 , 11\^0 , 6\^6 , 10\^0 and 11\^0\|fold, respectively, coinciding with the changes of egg granulomas. Thereafter, both collagen and collagenase mRNA levels decreased. TypesⅠ, Ⅲ and Ⅳ collagen mRNA levels declined to 2\|fold to 3\|fold compared with normal controls ( P 0\^05) at 28 weeks. This study showed that the synthesis and degradation of collagen remained dynamic balance in the early stage of schistosomiasis, while in the later stage the metabolism of collagen synthesis was higher than that of collagen degradation. Conclusion It was confirmed at the transcription level that when the metabolism of collagen synthesis was higher than that of collagen degradation in rabbits with schistosomiasis japonica, liver fibrosis might be produced.
