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[Dynamic changes in the expression of type VI collagen in mice with schistosomal liver fibrosis]
1Research Center of Tropical Medicine, Huashan Hospital, Shanghai Medical University, Shanghai 200040.
Aim:
To clarify the dynamic changes in type VI procollagen mRNA expression and collagen content in mice with schistosomal liver fibrosis.
Methods:
Northern blot hybridization and immunohistochemical technique.
Results:
The expression of alpha 1(VI) procollagen mRNA measured by Northern blot hybridization in the liver of schistosome infected mice was elevated significantly at 8 wk post infection, peaked at 10 wk pi, slightly decreased at 12-16 wk pi, and sustained at high levels until 20 wk pi. Immunohistochemical assay revealed that the staining pattern of type VI collagen first appeared in the walls of central veins and liver sinusoids at 8 wk pi, then extended gradually to the egg granuloma and the portal tract, within and surrounding the egg granuloma to form dense reticular septum at the 12, 16 and 20 wk pi, respectively. The VI collagen content as indicated by the intensity of stain peaked at 16 wk pi.
Conclusion:
Both the expression of alpha 1(VI) procollagen and the content of collagen VI were significantly increased in the liver of mice with early schistosomal fibrosis, suggesting that the type VI collagen detection might be of importance for evaluating the intensity of schistosomal liver fibrosis.
Insights
Type VI collagen expression and content increase in mice with schistosomal liver fibrosis. Detecting collagen VI may help evaluate fibrosis severity.
Area of Science:
- Biochemistry
- Immunology
- Pathology
Context:
- Schistosomal liver fibrosis is a significant health concern.
- Understanding collagen remodeling is crucial for fibrosis research.
Purpose:
- To investigate dynamic changes in type VI procollagen mRNA expression and collagen VI content in a mouse model of schistosomal liver fibrosis.
- To correlate these changes with the progression of liver fibrosis.
Summary:
- Alpha 1(VI) procollagen mRNA expression significantly elevated by 8 weeks post-infection, peaking at 10 weeks.
- Type VI collagen deposition observed in liver sinusoids and central veins by 8 weeks, expanding to granulomas and portal tracts by 12-20 weeks.
- Collagen VI content peaked at 16 weeks, indicating progressive accumulation during fibrosis.
Impact:
- Findings suggest type VI collagen is a key component in schistosomal liver fibrosis development.
- Type VI collagen detection could serve as a biomarker for assessing fibrosis intensity.
- This research contributes to understanding liver fibrosis pathogenesis and potential diagnostic strategies.