Abstract
Objective
Treatment regimens combining glucocorticoids with cyclophosphamide or rituximab or both are used to induce remission in ANCA-associated glomerulonephritis (ANCA-GN). There is a paucity of data on the efficacy and safety of these regimens in elderly patients with ANCA-GN. This study aimed to examine outcomes and adverse events in elderly AAV patients with three induction regimens: cyclophosphamide (CYC), cyclophosphamide and rituximab (CYC + RTX), and rituximab (RTX).
Methods
This single-center retrospective cohort study included patients 60 years and older diagnosed with ANCA-GN. Baseline characteristics and outcomes across several clinical parameters were recorded and compared for significance using Kruskal–Wallis test, Chi-squared test, Fisher exact test, univariate, and multivariate logistic regression as appropriate. Cox proportional hazard regression model was used for survival analysis.
Results
Seventy-five patients were included. The mean (SD) age at diagnosis was 70 (± 6) years. The mean (SD) follow-up duration was 5.17 (± 3.47) years. Remission induction therapy with glucocorticoids plus CYC was used in 25 patients, glucocorticoids plus CYC and RTX in 12 patients, and glucocorticoids plus RTX in 38 patients. RTX-treated patients had a higher baseline estimated glomerular filtration ratio (eGFR) (p = 0.00009). High remission rates were achieved in all groups (100% vs. 100% vs. 94.6% respectively, p = 0.368). The incidence of end-stage renal disease (ESRD) at one year was 8% among all groups (p = 0.999). There was no difference in the number of infections requiring hospitalization (p = 0.822), but a statistical difference in leukopenia was noted (32% vs. 25% vs. 3% respectively, p = 0.005). The use of RTX only was associated with reduced leukopenia (aOR = 0.1, 95% CI = 0.005–0.8) after adjusting for other variables.
Conclusions
CYC, CYC + RTX, and RTX are equally effective for remission induction in elderly patients with ANCA-GN. Induction therapy with RTX only was associated with a lower risk of leukopenia compared to CYC-containing regimens. Infections requiring hospitalization were similar among all groups. End-stage kidney disease at one year was comparable among the 3 groups.
Key Points • Cyclophosphamide, Rituximab, and Cyclophosphamide+Rituximab are equally effective in remission induction in elderly patients with ANCA glomerulonephritis. • The use of Rituximab only was associated with a lower risk of bone marrow suppression compared to Cyclophosphamide only. • More information is needed on the comparative safety of induction therapy strategies in elderly ANCA glomerulonephritis patients. |
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Data availability
The data that support the findings of this study are available within the article or from the corresponding author upon reasonable request.
Abbreviations
- CYC:
-
Cyclophosphamide
- RTX:
-
Rituximab
- PR3:
-
Proteinase-3
- MPO:
-
Myeloperoxidase
- ANCA:
-
Anti-neutrophil cytoplasmic auto-antibody
- GN:
-
Glomerulonephritis
- GPA:
-
Granulomatosis with polyangiitis
- MPA:
-
Microscopic polyangiitis
- eGFR:
-
Estimated glomerular filtration rate
- ESRD:
-
End-stage renal disease
- IgG:
-
Immunoglobulin G
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Acknowledgements
Duvuru Geetha is supported by the Johns Hopkins Center for Innovative Medicine
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Duvuru Geetha: Consultant to ChemoCentryx, GSK and Aurinia Inc.
Faten Aqeel: None.
Lillian Xu: None.
Antonio Salas: None.
Yumeng Wen: None.
Shaker Eid: None.
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Aqeel, F., Xu, L., Salas, A. et al. Outcomes of remission induction therapy for ANCA-associated vasculitis in the elderly. Clin Rheumatol 42, 2427–2435 (2023). https://doi.org/10.1007/s10067-023-06644-2
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DOI: https://doi.org/10.1007/s10067-023-06644-2