Alport Syndrome

Alport syndrome (AS) is a rare genetic condition that causes kidney disease, hearing loss, and eye abnormalities that occur due to changes in specific genes (COL4A3, COL4A4, and COL4A5). These genes help in producing an important protein called collagen. People with AS have a high risk of developing chronic kidney disease (CKD), a condition in which there is progressive loss in kidney function over time. The kidneys soon lose their ability to remove waste products from the body properly, resulting in end-stage kidney disease. A common sign of decreasing kidney function is the presence of excess protein in the urine that is not usually found with healthy kidneys. This condition is known as proteinuria. The study drug, BAY 3401016 (a monoclonal antibody), is a type of medicine that blocks a protein called Semaphorin 3A (Sema3A), which is thought to be involved in causing kidney damage in AS. By blocking the action of the Sema3A protein, BAY 3401016 may prevent proteinuria and slow down the loss in kidney function due to AS. The main purpose of this study is to learn more about how well BAY 3401016 works in slowing down the loss in kidney function in adults with a rapidly progressing AS.

This study aims to evaluate the burden and phenotypic spectrum of periodontal disease in patients with rare kidney disorders (such as Alport syndrome, Fabry disease, and tuberous sclerosis complex) and systemic lupus erythematosus (SLE), compared with chronic kidney disease (CKD) controls and population controls. This is a cross-sectional, case-control observational study. Participants will undergo a single structured evaluation including a full-mouth periodontal examination, a clinical questionnaire, and collection of relevant clinical and nephrological data. The primary objective is to compare the prevalence of periodontitis across study groups. Secondary objectives include characterization of periodontal disease severity, prevalence of gingivitis and xerostomia, and identification of disease-specific oral phenotypes. Exploratory analyses will assess associations between periodontal disease and clinical variables such as kidney function, proteinuria, and immunosuppressive exposure.

NEPTUNE Match is an additional opportunity offered to NEPTUNE study participants to prospectively recruit and communicate patient-specific clinical trial matching with kidney patients and their physician investigators.

To evaluate the safety, efficacy and tolerability of sparsentan oral suspension and tablets, and assess changes in proteinuria after once-daily dosing over 108 weeks.

Alport Syndrome Foundation's (ASF's) Alport Patient Registry (the Registry) is open to individuals living with Alport syndrome in the United States (US) and US territories and outlying islands. The Registry welcomes participants of all ages who have a confirmed clinical diagnosis of Alport syndrome. A confirmed diagnosis could be obtained via genetic testing, biopsy, and/or from a medical professional's clinical assessment of the individual's symptoms and/or family history. Participants can have any form and stage of this disease to be eligible for inclusion in the Registry. Patient participation in the Registry is crucial to helping attract and advance research, understanding understudied aspects of the disease, and informing clinical trials that may lead to Alport syndrome therapies and/or a cure. The Registry is accessed through a secure, online application. Participants report their own health history in the Registry and are encouraged to update any changes, at most, every three months. The security of each participant's information is a top priority. Any detail that could identify an individual participant is kept confidential in the Registry and such data are de-identified to protect the participant's privacy. No electronic health records or social security numbers are requested by or connected to the Registry. A parent or legal guardian may consent to enroll a child/dren Alport patient(s) under the age of 18 years. An additional assent form is used for individuals ages 7-17. At age 18, participants will be required to re-consent as an adult if they choose to continue to participate in the Registry.

Alport syndrome is a rare, inherited condition characterized by a combination of glomerular nephropathy progressing to kidney failure, deafness, and eye involvement. This disease is associated with mutations in the genes encoding one of the three IV collagen chains expressed in the glomerular basement membrane. Significant progress has been made in understanding the molecular mechanisms responsible for the disease, but relatively little in understanding the progression of renal failure and in the area of therapeutics. We have shown in a retrospective European study that blockers of the renin angiotensin system may slow disease progression, but no controlled studies have been performed. Finally, innovative therapies (anti-micro-RNA, stem cells) have recently shown their effectiveness in animal models of the disease, and industrials are planning to quickly carry out phase 1 trials to test molecules. Carrying out therapeutic trials in humans will require full knowledge of the natural history of the disease (isolated hematuria, microalbuminuria, macroalbuminuria, renal failure and its progression) and gathering a sufficient number of patients, especially in the early stages. These trials and the indications for treatments would be greatly facilitated by the discovery of biomarkers that make it possible to predict the progression to renal failure earlier than the onset of proteinuria. The study aims to: * Establish a European database on Alport syndrome to assess the natural history of the disease. * To investigate the impact of the disease on the educational and professional life of patients and their families, and on the adherence and tolerance to renin-angiotensin system blockers prescribed to proteinuric patients. * Investigate access to molecular diagnostics and genetic counseling, as well as identify biomarkers that can predict progression of kidney disease. This project will be carried out at a French level with the support and participation of the very active renal rare disease sector, in collaboration with various countries wishing to participate.

The hereditary type IV collagen disease Alport syndrome leads to kidney failure early in life. Currently there are no specific medications approved for treatment, however, several therapies have been evaluated preclinically and could improve outcome. For that reason, this non-interventional, observational study investigates, if medications (1) delay disease progression; (2) delay time to kidney failure; (3) improve life-expectancy compared to untreated patients (relatives). This observational study started in 2006 as an European registry. Since 2019, this registry has been expanded to "Alport XXL" via the International Alport Alliance as a global effort across all continents. From 2020 on to present, "Alport XXL" has a special focus on the outcomes of early therapy in young patients on ACE-inhibitors vs. Angiotensin-receptor blockers vs. their combination.

The goal of this clinical trial is to evaluate the safety and efficacy of human umbilical cord mesenchymal stem cells (hUC-MSC) in the treatment of Alport syndrome (AS) in a randomized, single-blind, placebo-controlled trial, to provide a clinical basis for the development of stem cell products for the treatment of AS, and to further clarify the therapeutic effect of hUC-MSC in the treatment of AS.

The goal of this National Registry is to is to collect information from patients with rare kidney diseases, so that it that can be used for research. The purpose of this research is to: * Develop Clinical Guidelines for specific rare kidney diseases. These are written recommendations on how to diagnose and treat a medical condition. * Audit treatments and outcomes. An audit makes checks to see if what should be done is being done and asks if it could be done better. * Further the development of future treatments. Participants will be invited to participate on clinical trials and other studies. The registry has the capacity to feedback relevant information to patients and in conjunction with Patient Knows Best (Home - Patients Know Best), allows patients to provide information themselves, including their own reported quality of life and outcome measures.

Alport syndrome (AS) is the second most common monogenic cause of end-stage renal failure (ESRF). AS is caused by variants in the COL4A3, COL4A4, and COL4A5 genes, which encode for the a3, a4, and a5 chains of type IV collagen. This trial is a prospective, randomized, controlled and multicenter trial. Mainly to assess the safety and efficacy of ramipril in Alport syndrome patients with variants of COL4A3/COL4A4/COL4A5.

Alport syndrome (AS) is caused by pathogenic variants in the type IV collagen genes COL4A3, COL4A4, and COL4A5. This study aims to enroll families and patients with a history of renal hematuria in 27 hospitals and detect these three genes for AS screening. This study also aims to analysis the effect of COL4A3/COL4A4/COL4A5 genotype on the development of kidney disease.