Correlation Between Renal Activity Index and C3 Complement Expression in Mouse Lupus Nephritis Model

Abstract

Background: Lupus nephritis is a disease which currently has no definitive therapy. For lupus nephritis, histological examination remains the best option to assess the degree of disease activity, which is essential for therapy evaluation and monitoring. At present, there is no single laboratory that can be used to assess disease activity. Therefore, this study aims to determine the correlation between renal activity index and C3 complement expression in mouse lupus nephritis model. Research methods: The study was conducted on male mice. Lupus was induced using intraperitoneal pristane injection at 0.5 cc, then left for four months. At the end of the 4th month, the mice were sacrificed, and histological examination of mice's kidneys and renal C3 complement expressions were evaluated. Statistical tests were done using t-test, Mann-Whitney test, and Spearman correlation test, with a significance level of P <0.05. Results: activity index on histological examination of mouse kidney in such aspects as glomerular proliferation, karyorrhexis, and fibrinoid necrosis, cellular crescents, hyaline deposits, and interstitial inflammation were associated with C3 complement expression in kidney tissue (r = 0.680; p = 0.001) Conclusion: The study demonstrateds that the activity index in kidney histological examination correlates with C3 complement expressions in the lupus nephritis model.