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Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
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Anti-complement factor H (CFH) autoantibodies could delay pristane-induced lupus nephritis
Lin-Lin Li1,2, Zhong-Qiu Luan3, Ying Tan1
1Renal Division, Department of Medicine, Peking University First Hospital, Beijing, China.
Immunologic Research
|June 15, 2023
Summary
Anti-complement factor H (CFH) autoantibodies were found to reduce lupus nephritis severity in mice. These autoantibodies enhance CFH function, regulating complement activation and inflammation.
Area of Science:
- Immunology
- Nephrology
- Autoimmunity
Background:
- Lupus nephritis is a severe complication of systemic lupus erythematosus.
- The role of anti-complement factor H (CFH) autoantibodies in lupus pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the role of anti-CFH autoantibodies in a mouse model of lupus nephritis.
- To explore the therapeutic potential of anti-CFH autoantibodies in lupus.
Main Methods:
- Pristane-induced lupus model in Balb/c mice.
- Administration of human CFH and induction of autoantibodies.
- Histopathological analysis, measurement of autoantibodies, complement components, and inflammatory factors.
- In vitro functional assays of purified autoantibodies.
Main Results:
- Anti-CFH autoantibodies significantly attenuated lupus nephritis, reducing proteinuria, renal damage, and inflammatory markers.
- Autoantibodies recognized both human and murine CFH, with specific epitope mapping.
- Functional studies showed enhanced CFH-C3b binding and Factor I-mediated C3b lysis.
Conclusions:
- Anti-CFH autoantibodies can ameliorate pristane-induced lupus nephritis.
- These autoantibodies enhance CFH bioactivity, modulating complement activation and inflammation.
