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[Immunoglobulin A nephropathy].

C Seikrit1, T Rauen1, J Floege2

  • 1Medizinische Klinik II (Klinik für Nieren- und Hochdruckkrankheiten, rheumatologische und immunologische Erkrankungen), Universitätsklinikum, RWTH Aachen, Pauwelsstr. 30, 52074, Aachen, Deutschland.

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Summary
This summary is machine-generated.

Immunoglobulin A nephropathy (IgAN) is a common kidney disease. While often mild, predicting its course is challenging, with risk factors including persistent hematuria and proteinuria influencing progression to end-stage renal disease.

Keywords:
CorticosteroidsGlomerulonephritisIgA nephropathy, pathophysiologyImmunosuppressionRisk factors

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Area of Science:

  • Nephrology
  • Immunology
  • Genetics

Background:

  • Immunoglobulin A nephropathy (IgAN) is the most common primary glomerulopathy globally.
  • The exact causes involving autoimmune, genetic, and environmental factors remain unclear.
  • Prognosis is variable, with one-third progressing to end-stage renal disease.

Purpose of the Study:

  • To summarize the current understanding of IgAN pathogenesis and risk factors.
  • To outline current treatment strategies and explore future therapeutic avenues.

Main Methods:

  • Review of existing literature on IgAN.
  • Analysis of findings from genome-wide association studies (GWAS).
  • Discussion of established and emerging pathogenetic mechanisms.

Main Results:

  • Key risk factors for IgAN progression include persistent microhematuria, proteinuria >1 g/day, hypertension, and tubulointerstitial fibrosis.
  • GWAS have identified numerous risk alleles contributing to IgAN pathophysiology.
  • The gut-kidney axis, complement system, and mucosal immunity genes are implicated.

Conclusions:

  • Supportive care is the primary treatment for IgAN.
  • Corticosteroids are reserved for progressive cases; other immunosuppressants lack current indications.
  • Future treatments may involve local budesonide or lymphocyte activation inhibition.