PMID- 32353879 OWN - NLM STAT- MEDLINE DCOM- 20210201 LR - 20210201 IS - 1462-0332 (Electronic) IS - 1462-0324 (Linking) VI - 59 IP - 11 DP - 2020 Nov 1 TI - Per-protocol repeat kidney biopsy portends relapse and long-term outcome in incident cases of proliferative lupus nephritis. PG - 3424-3434 LID - 10.1093/rheumatology/keaa129 [doi] AB - OBJECTIVES: In patients with LN, clinical and histological responses to treatment have been shown to be discordant. We investigated whether per-protocol repeat kidney biopsies are predictive of LN relapses and long-term renal function impairment. METHODS: Forty-two patients with incident biopsy-proven active proliferative (class III/IV+/-V) LN from the database of the UCLouvain were included in this retrospective study. Per-protocol repeat biopsies were performed after a median [interquartile range (IQR)] time of 24.3 (21.3-26.2) months. The National Institutes of Health activity index (AI) and chronicity index (CI) scores were assessed in all biopsies. RESULTS: Despite a moderate correlation between urinary protein/creatinine ratios (UPCR) and AI scores at repeat biopsy (r = 0.48; P = 0.001), 10 patients (23.8%) with UPCR < 1.0 g/g still had a high degree of histological activity (AI > 3). High AI scores (continuous) in repeat biopsies were associated with an increased probability and/or shorter time to renal relapse (n = 11) following the repeat biopsy [hazard ratio (HR) = 1.2, 95% CI: 1.1, 1.3; P = 0.007], independently of proteinuria levels. High CI scores (continuous) in repeat biopsies were associated with a sustained increase in serum creatinine levels corresponding to >/=120% of the baseline value (HR = 1.8, 95% CI: 1.1, 2.9; P = 0.016) through a median (IQR) follow-up time of 131.5 (73.8-178.2) months, being also the case for acute tubulointerstitial inflammation and interstitial fibrosis/tubular atrophy in repeat but not baseline biopsies. CONCLUSION: Our results highlight the usefulness of per-protocol repeat biopsies, herein performed after a median time of 24 months from baseline, as an integral part of the treatment evaluation, also in patients showing adequate clinical response. CI - (c) The Author(s) 2020. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For permissions, please email: journals.permissions@oup.com. FAU - Parodis, Ioannis AU - Parodis I AD - Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Rheumatology, Karolinska University Hospital, Stockholm, Sweden. FAU - Adamichou, Christina AU - Adamichou C AD - Rheumatology Department, Cliniques Universitaires Saint-Luc and Pole de Pathologies Rhumatismales Inflammatoires et Systemiques, Institut de Recherche Experimentale et Clinique, Universite catholique de Louvain. FAU - Aydin, Selda AU - Aydin S AD - Pathology Department, Cliniques Universitaires Saint-Luc. FAU - Gomez, Alvaro AU - Gomez A AD - Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Rheumatology, Karolinska University Hospital, Stockholm, Sweden. FAU - Demoulin, Nathalie AU - Demoulin N AD - Division of Nephrology, Cliniques Universitaires Saint-Luc and Institut de Recherche Experimentale et Clinique, Universite catholique de Louvain, Brussels, Belgium. FAU - Weinmann-Menke, Julia AU - Weinmann-Menke J AD - Department of Nephrology, Rheumatology and Clinical Immunology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Germany. FAU - Houssiau, Frederic A AU - Houssiau FA AD - Rheumatology Department, Cliniques Universitaires Saint-Luc and Pole de Pathologies Rhumatismales Inflammatoires et Systemiques, Institut de Recherche Experimentale et Clinique, Universite catholique de Louvain. FAU - Tamirou, Farah AU - Tamirou F AD - Rheumatology Department, Cliniques Universitaires Saint-Luc and Pole de Pathologies Rhumatismales Inflammatoires et Systemiques, Institut de Recherche Experimentale et Clinique, Universite catholique de Louvain. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Rheumatology (Oxford) JT - Rheumatology (Oxford, England) JID - 100883501 RN - 0 (Glucocorticoids) RN - 0 (Immunologic Factors) RN - 0 (Immunosuppressive Agents) RN - 4F4X42SYQ6 (Rituximab) RN - 8N3DW7272P (Cyclophosphamide) RN - AYI8EX34EU (Creatinine) RN - HU9DX48N0T (Mycophenolic Acid) RN - X4W7ZR7023 (Methylprednisolone) SB - IM MH - Adult MH - Biopsy MH - Creatinine/urine MH - Cyclophosphamide/therapeutic use MH - Disease Progression MH - Female MH - Glucocorticoids/therapeutic use MH - Humans MH - Immunologic Factors/therapeutic use MH - Immunosuppressive Agents/therapeutic use MH - Kidney/*pathology MH - Kidney Tubules/pathology MH - Lupus Nephritis/drug therapy/*pathology/urine MH - Male MH - Methylprednisolone/therapeutic use MH - Mycophenolic Acid/therapeutic use MH - Prognosis MH - Proportional Hazards Models MH - Proteinuria/urine MH - Pulse Therapy, Drug MH - Recurrence MH - Retrospective Studies MH - Rituximab/therapeutic use MH - Young Adult OTO - NOTNLM OT - histopathology OT - long-term outcome OT - lupus nephritis OT - renal biopsy OT - renal function OT - repeat biopsy OT - systemic lupus erythematosus EDAT- 2020/05/01 06:00 MHDA- 2021/02/02 06:00 CRDT- 2020/05/01 06:00 PHST- 2019/11/26 00:00 [received] PHST- 2020/02/24 00:00 [revised] PHST- 2020/05/01 06:00 [pubmed] PHST- 2021/02/02 06:00 [medline] PHST- 2020/05/01 06:00 [entrez] AID - 5827514 [pii] AID - 10.1093/rheumatology/keaa129 [doi] PST - ppublish SO - Rheumatology (Oxford). 2020 Nov 1;59(11):3424-3434. doi: 10.1093/rheumatology/keaa129.