Hereditary amyloidosis is a rare genetic condition characterized by the buildup of an abnormal protein called amyloid in multiple organs of the body. Amyloid deposits can form in vital organs such as the heart, kidneys and the nervous system. The deposits disrupt the structure and the function of these organs, ultimately leading to organ failure.
Transthyretin-related amyloidosis is the most common form of hereditary amyloidosis, caused by defective transthyretin (TTR) protein. TTR is primarily made in the liver and is involved in the transport of vitamin A and the thyroid hormone thyroxine.
In people with TTR-related amyloidosis, transthyretin is misfolded, leading to the formation of amyloid clumps. These clumps are deposited in various organs, including the heart and the nervous system causing permanent damage.
Take this test to find out whether you are at risk. Early identification is key since treatment options focus on preventing or delaying organ damage.
TTR-related amyloidosis is caused by genetic variation in the TTR gene. Approximately 136 genetic variants of the TTR gene are linked to TTR-related amyloidosis. Inheriting just one altered copy of the gene may be sufficient to develop the disease.
This test detects the presence of the three most common TTR variants that cause hereditary amyloidosis. These variants are predicted to account for between 50% and 80% of all TTR-related hereditary amyloidosis cases.
- rs76992529 – most common in people of West African descent, leading to an increased risk of cardiomyopathy
- rs28922979 – most common in people of Northern Swedish, Portuguese, and Japanese descent
- rs121918070 – most common in people of Irish and British descent
Diagnosing TTR-related amyloidosis can be difficult because the signs and symptoms often resemble other more common conditions. Understanding your genetic risk can encourage early monitoring to prevent or delay organ damage.
How It Works
Step 1: Sign up for a free DNA Access account.
Step 2: Upload your DNA markers to DNA Access.
Step 3: Log in to your account to access your results when they are ready.