PMID- 37261001 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240320 IS - 2048-8505 (Print) IS - 2048-8513 (Electronic) IS - 2048-8505 (Linking) VI - 16 IP - 6 DP - 2023 Jun TI - Challenges of defining renal response in ANCA-associated vasculitis: call to action? PG - 965-975 LID - 10.1093/ckj/sfad009 [doi] AB - Avoiding end-stage kidney disease in patients with anti-neutrophil cytoplasmic antibody-associated vasculitis (AAV) has a high therapeutic priority. Although renal response is a crucial measure to capture clinically relevant changes, clinal trials have used various definitions and no well-studied key surrogate markers to predict renal outcome in AAV exist. Differences in clinical features and histopathologic and therapeutic approaches will influence the course of kidney function. Its assessment through traditional surrogates (i.e. serum creatinine, glomerular filtration rate, proteinuria, hematuria and disease activity scores) has limitations. Refinement of these markers and the incorporation of novel approaches such as the assessment of histopathological changes using cutting-edge molecular and machine learning mechanisms or new biomarkers could significantly improve prognostication. The timing is favourable since large datasets of trials conducted in AAV are available and provide a valuable resource to establish renal surrogate markers and, likely, aim to investigate optimized and tailored treatment approaches according to a renal response score. In this review we discuss important points missed in the assessment of kidney function in patients with AAV and point towards the importance of defining renal response and clinically important short- and long-term predictors of renal outcome. CI - (c) The Author(s) 2023. Published by Oxford University Press on behalf of the ERA. FAU - Odler, Balazs AU - Odler B AD - Division of Nephrology, Department of Internal Medicine, Medical University of Graz, Graz, Austria. AD - Department of Medicine, University of Cambridge, Cambridge, UK. FAU - Bruchfeld, Annette AU - Bruchfeld A AUID- ORCID: 0000-0002-9752-9941 AD - Department of Clinical Science, Intervention and Technology, Division of Renal Medicine Karolinska Institutet, Stockholm, Sweden. AD - Department of Health, Medicine and Caring Sciences, Linkopings Universitet, Linkoping, Sweden. FAU - Scott, Jennifer AU - Scott J AD - Trinity Health Kidney Center, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin, Ireland. FAU - Geetha, Duvuru AU - Geetha D AD - Division of Nephrology, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA. FAU - Little, Mark A AU - Little MA AUID- ORCID: 0000-0001-6003-397X AD - Trinity Health Kidney Center, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin, Ireland. FAU - Jayne, David R W AU - Jayne DRW AD - Department of Medicine, University of Cambridge, Cambridge, UK. FAU - Kronbichler, Andreas AU - Kronbichler A AD - Department of Medicine, University of Cambridge, Cambridge, UK. LA - eng GR - J 4664/FWF_/Austrian Science Fund FWF/Austria PT - Journal Article PT - Review DEP - 20230111 PL - England TA - Clin Kidney J JT - Clinical kidney journal JID - 101579321 PMC - PMC10229283 OTO - NOTNLM OT - ANCA vasculitis OT - ESKD OT - kidney function OT - outcome OT - renal response COIS- B.O. has received speaker fees and travel support from Otsuka. A.B. is member of the CKJ editorial board and has received consulting and speaker fees from AstraZeneca, Bayer, ChemoCentryx, Fresenius, Merck/MSD and Vifor. D.G. has received consulting fees from ChemoCentryx, GlaxoSmithKline and Aurinia. D.J. has received consultancy or lecture fees from Amgen, AstraZeneca, Bristol-Myers Squibb, ChemoCentryx, CSL Vifor, Novartis, Otsuka, Roche and Takeda. A.K. is member of the CKJ editorial board and has received consulting fees from Vifor Pharma, Otsuka, Delta 4, UriSalt and Catalyst Biosciences. The other authors declared no conflicts of interest related to this work. EDAT- 2023/06/01 13:09 MHDA- 2023/06/01 13:10 PMCR- 2023/01/11 CRDT- 2023/06/01 10:34 PHST- 2022/09/16 00:00 [received] PHST- 2023/06/01 13:10 [medline] PHST- 2023/06/01 13:09 [pubmed] PHST- 2023/06/01 10:34 [entrez] PHST- 2023/01/11 00:00 [pmc-release] AID - sfad009 [pii] AID - 10.1093/ckj/sfad009 [doi] PST - epublish SO - Clin Kidney J. 2023 Jan 11;16(6):965-975. doi: 10.1093/ckj/sfad009. eCollection 2023 Jun.