Alport Syndrome
Alport syndrome is a rare inherited condition that primarily affects the kidneys.
Overview
Alport syndrome is a rare inherited condition that primarily affects the kidneys. It can also affect hearing and eyesight. The condition occurs because of a problem with collagen, an important structural protein that helps form healthy kidney filters, the inner ear and parts of the eye. Over time, Alport syndrome can lead to progressive kidney damage and, in some individuals, kidney failure.
Causes and Genetics
Alport syndrome is caused by changes (mutations) in genes responsible for making type IV collagen. These genes are important for maintaining the structure of the kidney's filtering units (glomeruli). The condition is most commonly inherited in an X-linked pattern, meaning males are often more severely affected. It can also be inherited in autosomal recessive or autosomal dominant patterns. In some cases, the genetic change occurs for the first time in the affected individual.
Symptoms and Features
Symptoms may begin in childhood but can vary widely in severity.
Characteristic Symptoms and Features
- Blood in the urine (which may only be detected on testing)
- Protein in the urine
- Progressive kidney impairment
Other Associated Symptoms and Features
- Hearing loss, particularly affecting high-pitched sounds
- Vision changes due to eye structure differences
- In later stages, swelling of the legs or around the eyes due to kidney dysfunction
Kidney function may gradually decline over years, and some individuals develop kidney failure requiring dialysis or transplantation.
Treatment
Hearing aids may be recommended if hearing loss develops. Regular eye assessments help monitor vision changes. In advanced kidney disease, dialysis or kidney transplantation may be required. Care is usually coordinated through specialist kidney (nephrology) services.
Research and Future Directions
Ongoing research is focused on developing treatments that target the underlying collagen defect and slow kidney damage. Gene-based therapies and new medications aimed at protecting kidney function are under investigation. Earlier diagnosis and improved long-term monitoring continue to improve outcomes.