CLINICAL AND LABORATORY INDICATORS OF RENAL INVOLVEMENT IN SYSTEMIC LUPUS ERYTHEMATOSUS: AN ANALYTICAL REVIEW

Abstract

Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by multisystem involvement resulting from complex immunological disturbances. Among its various complications, renal damage, commonly known as lupus nephritis, represents one of the most serious and prognostically significant manifestations of the disease. Renal involvement occurs in approximately 40–60% of patients with SLE and significantly contributes to morbidity and mortality worldwide. The early identification of clinical and laboratory indicators associated with renal involvement remains essential for timely intervention and improved therapeutic outcomes. This study presents an analytical scientific review of the clinical and laboratory indicators associated with renal involvement in patients with systemic lupus erythematosus. The paper summarizes theoretical and empirical findings from contemporary medical literature, research articles, and academic dissertations addressing lupus nephritis and its diagnostic characteristics. Special attention is devoted to the role of immunological biomarkers, including anti-double-stranded DNA antibodies, complement components, urinary sediment analysis, and proteinuria levels. Additionally, the relationship between clinical symptoms, laboratory findings, and histopathological changes in kidney tissue is discussed. Statistical analyses from international epidemiological studies demonstrate that lupus nephritis develops in nearly half of patients within the first five years after diagnosis of SLE. Persistent proteinuria, hematuria, decreased complement levels, and elevated immunological markers are among the most reliable predictors of renal involvement. Modern diagnostic strategies emphasize a combination of laboratory biomarkers and clinical manifestations to detect early renal damage. The results highlight the importance of comprehensive laboratory monitoring and early diagnostic evaluation in patients with systemic lupus erythematosus. Early detection of renal involvement improves therapeutic management and significantly reduces the risk of progression to chronic kidney disease and renal failure.