Xiao ZH, Guo WH, Zhang JX. Role of small ubiquitin-related modifier-1 in the pathogenesis of hepatic fibrosis in rats.
Shijie Huaren Xiaohua Zazhi 2010;
18:1422-1427. [DOI:
10.11569/wcjd.v18.i14.1422]
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Abstract
AIM: To observe the changes in the expression of small ubiquitin-related modifier-1 (SUMO-1) during the formation of hepatic fibrosis in rats and to investigate the role of SUMO-1 in the pathogenesis of hepatic fibrosis.
METHODS: Ninety male Sprague-Dawley rats were divided into two groups: model group and control group. The model group was subcutaneously injected with 40% carbon tetrachloride at a dose of 0.3 mL/100 g of body weight, while the control group was given equivalent volume of normal saline. Liver tissue samples were taken at weeks 2, 4, 6, 8, 10 and 12 after carbon tetrachloride injection. Hepatic fibrosis was pathologically evaluated. The expression of SUMO-1 mRNA and protein in liver tissue was detected by RT-PCR and Western blot, respectively.
RESULTS: During the formation of hepatic fibrosis, the expression of SUMO-1 mRNA was gradually up-regulated from week 2 to 12 (0.725 ± 0.017, 0.786 ± 0.018, 0.803 ± 0.023, 0.831 ± 0.020, 0.863 ± 0.016 and 0.892 ± 0.008, respectively; P < 0.01). Similarly, SUMO-1 protein expression was also gradually up-regulated from week 2 to 12 (0.810 ± 0.059, 0.873 ± 0.049, 0.923 ± 0.055, 0.959 ± 0.032, 0.988 ± 0.011 and 0.998 ± 0.004, respectively; P < 0.01).
CONCLUSION: The expression of both SUMO-1 mRNA and protein is gradually up-regulated during the formation of hepatic fibrosis, suggesting an important role of SUMO-1 in the pathogenesis of hepatic fibrosis.
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