Persistent Disease Activity in Patients With Long-Standing Glomerular Disease

Area of Science:

• Nephrology
• Immunology
• Internal Medicine

Background:

• Glomerular diseases (GN) exhibit variable clinical activity over extended periods.
• Understanding the relationship between disease duration and clinical activity is crucial for managing chronic kidney conditions.

Purpose of the Study:

• To analyze the relationship between clinical disease activity and the duration of glomerular disease.
• To compare disease activity in patients with longstanding glomerular disease versus those with recent diagnoses.

Main Methods:

• Compared disease activity in adults with longstanding IgA nephropathy (IgAN) and other GN (Of Longstanding Disease [OLD] cohort) with incident cohorts (Cure Glomerulonephropathy Network [CureGN]).
• Disease activity was assessed using Kidney Disease: Improving Global Outcomes (KDIGO) criteria and CureGN definitions.
• Cohorts included patients from Columbia University Medical Center (CUMC) and CureGN.

Main Results:

• No significant differences in age, sex, serum creatinine, or urinary protein-to-creatinine ratio were found among cohorts.
• Disease activity in the OLD cohort was comparable to that in the entire CureGN and CUMC-CureGN cohorts.
• OLD patients showed similar activity rates to incident CUMC-CureGN patients (biopsy within 6 months).

Conclusions:

• Clinical disease activity in glomerular diseases does not differ significantly between patients with shorter versus longer disease durations.
• Patients with long-term, persistent glomerular disease are valuable for understanding disease pathogenesis and identifying factors in chronic subtypes.