protocolSection identificationModule nctId: NCT06325059, orgStudyIdInfo id: BIO-KIDNEY, briefTitle: The Role of Renal Progenitors and Polyploid Tubular Cell Response in Glomerular and Tubular Diseases, statusModule overallStatus: RECRUITING, startDateStruct date: 2023-03-22, primaryCompletionDateStruct date: 2047-03-22, completionDateStruct date: 2047-11-30, studyFirstPostDateStruct date: 2024-03-22, lastUpdatePostDateStruct date: 2024-03-22, sponsorCollaboratorsModule leadSponsor name: Meyer Children's Hospital IRCCS, class: OTHER, descriptionModule briefSummary: Renal progenitors are a subset of parietal epithelial cells (PECs) localized at the urinary pole of Bowman's capsule. Experimental models of podocyte damage showed that PECs can potentially regenerate lost podocytes by migrating from Bowman's capsule to the glomerular tuft, acquiring the morphological and functional features of mature podocytes. Podocyte loss and damage, as well as the inability of PECs to replace lost podocytes, lead to glomerular scarring and chronic kidney disease (CKD) progression.In addition, the investigators of the present study and others have recently demonstrated the existence of a specific subpopulation of tubular cells in the human kidney with a high potential for regeneration and resistance to death, thus acting as tubular progenitors. These cells are involved in tubular response to damage during acute kidney injury (AKI) trough endoreplication (polyploidization).Kidney biopsy is the cornerstone of diagnosis in many kidney diseases leading to CKD and AKI, allowing unambiguous diagnosis in some cases and presumptive diagnosis of ongoing disease in others. Very recently, super resolution imaging techniques proved to maintain current diagnostic standards while allowing to study morphological features of pathophysiological mechanisms of glomerular and tubular diseases.The rationale of this project is to study the role of renal progenitors (PECs and tubular progenitors) in the pathogenesis of CKD and AKI trough super resolution imaging applied to human renal biopsies, to the aim of identifying relevant connections with clinical data and markers of damage and/or disease progression., conditionsModule conditions: Nephropathy, designModule studyType: INTERVENTIONAL, phases: NA, designInfo allocation: NA, interventionModel: SINGLE_GROUP, interventionModelDescription: Patients affected by nephropathy, primaryPurpose: BASIC_SCIENCE, maskingInfo masking: NONE, enrollmentInfo count: 200, type: ESTIMATED, armsInterventionsModule interventions name: Study of renal progenitors, outcomesModule primaryOutcomes measure: Evaluation of the role of renal progenitors in the progression of glomerular diseases, secondaryOutcomes measure: Evaluation of the role of tubular endoreplication in mechanisms of acute kidney injury (AKI), secondaryOutcomes measure: Evaluation of the role of tubular endoreplication in mechanisms of acute kidney injury (AKI) trough DNA and RNA analysis, eligibilityModule sex: ALL, minimumAge: 1 Month, maximumAge: 17 Years, stdAges: CHILD, contactsLocationsModule locations facility: Meyer Children's Hospital IRCCS, status: RECRUITING, city: Firenze, country: Italy, contacts name: Paola Romagnani, role: CONTACT, geoPoint lat: 43.77925, lon: 11.24626, hasResults: False