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In situ hybridization of hepatitis B DNA in hepatitis B-associated glomerulonephritis
Insights
Hepatitis B virus DNA was found in 95.3% of children with HBV-associated glomerulonephritis, indicating its presence in kidney cells. Extensive viral DNA presence correlated with more severe disease and longer proteinuria duration.
Area of Science:
- Nephrology
- Virology
- Pathology
Background:
- Hepatitis B virus-associated glomerulonephritis (HBV-GN) is a significant cause of kidney disease in children.
- The role of persistent HBV DNA in the pathogenesis of HBV-GN requires further elucidation.
Purpose of the Study:
- To investigate the presence and distribution of HBV DNA in renal tissues of children with HBV-GN.
- To correlate HBV DNA localization with clinical manifestations and disease severity in HBV-GN.
Main Methods:
- Renal biopsy tissues from 49 children with HBV-GN were analyzed using in situ hybridization (ISH) for HBV DNA.
- HBV DNA presence was compared with HBV antigen assays and clinical data.
Main Results:
- HBV DNA was detected in 95.3% (41/43) of the examined renal tissues.
- Viral DNA was found in glomerular epithelial and mesangial cells, renal tubular epithelial cells, and interstitial tissues.
- Widespread HBV DNA distribution correlated with more severe clinical symptoms and prolonged proteinuria, especially when present in renal tubules.
Conclusions:
- The persistence of HBV DNA in renal tissues is implicated in the pathogenesis of HBV-GN.
- Findings support the hypothesis that viral genome presence leads to antigen expression and cellular damage.
- Antiviral therapies, such as cytokines, may be beneficial for treating HBV-GN.
Abstract:
Renal tissues from 43 of 49 children with hepatitis B virus-associated glomerulonephritis (HBV-GN) were examined for HBV DNA by in situ hybridization (ISH) assay within the last 10 years. HBV DNA was identified in 41 of the 43 cases (95.3%). HBV DNA was distributed generally in the nucleus and cytoplasm of epithelial cells and mesangial cells of glomeruli, and epithelial cells of renal tubules. HBV DNA also existed simultaneously in renal interstitial tissues in some of these cases. The positive results from HBV DNA ISH correlated well with HBV antigen assays. The analyses implied that the more extensive the existence of HBV DNA in the nephron unit and interstitial tissue, the more severe the clinical manifestation. The duration of proteinuria in cases with HBV DNA in renal tubules was much longer than in those with no HBV DNA in renal tubules. The persistence of the HBV genome or genes in the kidney could lead to the expression of viral antigens in renal tissues and might cause cellular pathological alteration. This would support utilization of antiviral therapy, such as cytokines, in the treatment of HBV-GN.