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Author Spotlight: Investigating the Potential of Chinese Herbal Medicinal Active Dioscin in Treating IgA Nephropathy
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Spondyloarthritis-Associated IgA Nephropathy
Nicolas Champtiaux1,2, Frédéric Lioté3,4, Khalil El Karoui5
1Department of Internal Medicine, Hôpital de la Pitié-Salpétrière, Assistance Pulique-Hopitaux de Paris, Paris, France.
Kidney International Reports
|June 11, 2020
Summary
Spondyloarthritis-associated IgA nephropathy (IgAN) shows a poor renal outcome, with high rates of kidney function decline and end-stage renal disease. Treatments like steroids and TNF-α blockade did not significantly alter this progression.
Area of Science:
- Nephrology
- Rheumatology
- Immunology
Background:
- Immunoglobulin A nephropathy (IgAN) can co-occur with spondyloarthritis (SpA).
- Limited data exists on the long-term kidney outcomes for patients with SpA-associated IgAN.
- Understanding this association is crucial for managing kidney health in SpA patients.
Purpose of the Study:
- To investigate the clinical course and renal outcomes of patients with biopsy-proven IgA nephropathy and spondyloarthritis.
- To identify factors associated with kidney function decline in this specific patient cohort.
- To evaluate the impact of certain treatments on renal outcomes.
Main Methods:
- Retrospective analysis of 32 patients with biopsy-proven IgAN and definite SpA.
- Centralized examination and scoring of kidney biopsies using the IgAN Oxford Classification.
- Assessment of estimated glomerular filtration rate (eGFR) and urine protein-to-creatinine ratio at baseline and during follow-up.
Main Results:
- A high prevalence of crescents (33%) and interstitial inflammation (18%) was observed in kidney biopsies.
- Despite treatment with renin-angiotensin system inhibitors and steroids, renal outcomes were poor.
- After a median follow-up of 5.9 years, 12.5% reached end-stage renal disease, and 41% experienced a >50% eGFR decrease.
- Hypertension, proteinuria, and Oxford classification scores (S and T) were linked to increased risk of advanced chronic kidney disease (CKD).
Conclusions:
- SpA-associated IgAN is characterized by a poor renal prognosis, even with aggressive treatment.
- Tumor necrosis factor-alpha (TNF-α) blockade did not demonstrate a significant effect on the rate of eGFR decline.
- Further research is needed to identify more effective therapeutic strategies for SpA-associated IgAN.
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