Alport syndrome is an inherited condition that affects the kidneys and often the ears and eyes. It is caused by changes in the genes that make type IV collagen, an important building block of the kidney's filters. Early diagnosis and treatment can help slow kidney damage, and family screening allows relatives to be checked in time.
What Is Alport Syndrome?
The kidney's filters (glomeruli) rely on a thin membrane made partly of type IV collagen. In Alport syndrome, this collagen is faulty, so the membrane becomes thin, split or weak. Blood and protein leak into the urine, and over time the kidneys may be scarred.
The same collagen is found in parts of the inner ear and eye, which is why hearing loss and eye changes may occur.
How It Is Inherited
Alport syndrome can be passed down in different ways, which affects who in the family may be at risk.
- X-linked: the most common form; males are usually more severely affected, while females may have milder but still significant disease
- Autosomal recessive: both parents carry a gene change; males and females may be equally affected
- Autosomal dominant: one affected gene from a parent; often milder and slower to progress
- Some people have no known family history, due to a new gene change
Symptoms
Signs often begin in childhood or adolescence but may be found later in milder forms.
- Blood in the urine, either visible or detected on testing
- Protein in the urine, sometimes making it frothy
- High blood pressure
- Swelling of the legs or around the eyes
- Gradual hearing loss, often for higher-pitched sounds
- Vision changes due to eye involvement
- Declining kidney function over time
Diagnosis
Diagnosis may involve urine tests, blood tests for kidney function, a detailed family history, hearing tests and an eye examination. Genetic testing is increasingly used and can confirm the diagnosis and inheritance pattern. In some cases, a kidney biopsy may be done to examine the filter membrane. Genetic counselling helps families understand results and risks to other members.
Treatment
There is currently no cure, but treatment can help slow the progression of kidney disease and manage complications.
Many people with Alport syndrome live active lives for many years, particularly when treatment is started early. Regular follow-up allows the nephrologist to adjust treatment as the condition changes. Protecting hearing by avoiding prolonged exposure to loud noise, and attending periodic eye and hearing checks, may also help. For those who reach kidney failure, both dialysis and transplantation are well-established options.
- Blood pressure medicines that also reduce protein leakage, often started early as advised by the nephrologist
- Other kidney-protective medicines in selected patients
- Healthy lifestyle measures, including limiting salt and avoiding smoking
- Regular monitoring of kidney function, urine protein and blood pressure
- Hearing aids and eye care when needed
- Planning for dialysis or kidney transplantation if kidney failure develops
When to See a Nephrologist
See a nephrologist if blood or protein is found in the urine of a child or young adult, especially with hearing loss or a family history of kidney failure. Relatives of someone diagnosed with Alport syndrome may also benefit from urine testing and, where appropriate, genetic testing.
Frequently Asked Questions
Can Alport syndrome be cured?
There is no cure yet, but early treatment to control blood pressure and reduce protein leakage may help slow kidney damage. Research into new therapies is ongoing.
Should my family members be tested?
Yes, relatives may benefit from simple urine tests and, where suitable, genetic testing. Early detection allows timely treatment and monitoring.
Is kidney transplantation possible in Alport syndrome?
Kidney transplantation is an option for many people who develop kidney failure. Potential family donors need careful evaluation to ensure they are not affected.
Can women carry or have Alport syndrome?
In the X-linked form, women are often described as carriers, but many develop blood in the urine and some may develop protein leakage, high blood pressure or kidney decline. They also benefit from regular check-ups.
Consult Dr. Satarupa Deb
If you or your family are affected by Alport syndrome or another inherited kidney condition, book a consultation with Dr. Satarupa Deb at Bombay Hospital, South Mumbai.
This page is for general information only and is not a substitute for a medical consultation. Please consult a qualified doctor for diagnosis and treatment.