Basic and translational concepts of immune-mediated glomerular diseases

Area of Science:

• Immunology
• Nephrology
• Pathogenesis of Glomerular Diseases

Background:

• Glomerulonephritis (GN) pathogenesis involves genetically modified immune responses to infections and self-antigens.
• Innate immune pathways, including Toll-like receptors and complement, are activated by pathogen- and danger-associated molecular patterns.
• Both innate and adaptive immune responses contribute to glomerular structure damage.

Purpose of the Study:

• To review and update pathogenic mechanisms of various human GN diseases.
• To summarize findings from in vitro, experimental models, and human studies.
• To highlight opportunities for future therapeutic interventions in GN.

Main Methods:

• Review of existing literature from in vitro studies.
• Analysis of data from well-characterized experimental models of GN.
• Synthesis of information from human studies on nephritis and nephrotic syndrome.

Main Results:

• Immune responses, involving CD4 T cells and Th17 cells, drive antibody production, immune complex formation, and complement activation.
• Specific GN types reviewed include postinfectious GN, IgA nephropathy, anti-GBM GN, ANCA-associated GN, lupus nephritis, MPGN, minimal change disease/FSGS, membranous nephropathy, and C3 glomerulopathies.
• Pathogenic mechanisms involve activation of circulating monocytes and resident glomerular cells, releasing inflammatory mediators.

Conclusions:

• Understanding the immunopathogenesis of GN is crucial for developing targeted therapies.
• Immune system dysregulation is central to the initiation and progression of diverse glomerular diseases.
• Advances in immunopathogenesis research pave the way for novel treatment strategies for nephritis and nephrotic syndrome.