FDA authorizes marketing of Fragile X syndrome dx

Create PDF

April 2020—The FDA authorized the marketing of AmplideX Fragile X Dx and Carrier Screen Kit (Asuragen). It is the first test, according to the FDA, to detect Fragile X syndrome, the most common known cause of inherited developmental delay and intellectual disability. Additionally, this test is intended for use in adults who may be carriers of genetic alterations in the FMR1 gene.

The kit uses blood specimens from patients to measure the number of repeats of the CGG segment in the FMR1 gene. The test can determine whether a patient has a number of CGG repeats that is considered normal, intermediate, premutation, or full mutation.