A Study to Learn About How Well BAY 3401016 Works in Adults With Alport Syndrome

This study is looking for adults between 18 and 45 years old who have Alport Syndrome. This includes men with X-linked Alport Syndrome or men and women with autosomal recessive Alport Syndrome.

To join, your kidneys should still be working reasonably well, but you should also have a certain amount of protein in your urine, which is a sign of kidney problems in Alport Syndrome. Your blood pressure also needs to be within a healthy range.

However, you won't be able to join if you have other types of kidney disease, if you have a serious illness that could affect your safety or the study results, or if you have had cancer. People with severe allergies, certain skin conditions (like eczema or severe acne), or allergies needing specific treatments (like steroids for asthma) are also not suitable for this study.

If you join the study, you would receive either the study medication, BAY 3401016, or a placebo (an inactive substance that looks like the real medicine). You wouldn't know which one you are getting. You would have regular visits to the clinic for health checks, blood tests, urine tests, and to monitor your kidney function and overall health. These visits would help the doctors see how your body is reacting to the treatment and if there are any changes. The total length of your participation in the study, including all follow-up, would be discussed with you by the study team.