Epithelial Dysmetabolism and Renal Fibrosis in ANCA Vasculitis

Inclusion Criteria: * Patients with an indication for initial diagnostic PBR on native kidney * 18 ans ≥ Age ≤ 90 ans * Affiliation to french health insurance * Patient having given consent For the ANCA vasculitis group: • Diagnosis of ANCA vasculitis retained on renal biopsy with ANCA anti-proteinase 3 (PR3) or ANCA anti-myeloperoxidase (MPO) For the control groups: • Diagnosis retained after the renal biopsy * Interstitial Nephritis * Or glomerular nephropathy such as minimal change nephropathy * Or Segmental hyalinosis in itscollapsing form * Or Extramembranous Glomerulopathy, * Or glomerulopathy with mesangial IgA deposits * Or diabetic nephropathy. Exclusion Criteria: * Kidney transplant patient * Patient on dialysis (hemodialysis or peritoneal dialysis) * Patient under legal protection, guardianship or curatorship * Pregnancy or breastfeeding * Enrollement in an interventional study except studies relating to ANCA vasculitis and nephropathy with mesangial IgA deposits.