A simple blood test could one day diagnose a rare inherited form of Alzheimer's disease, decades before symptoms of memory loss even appear.
disease, decades before symptoms of memory loss even appear.
One form, called autosomal dominant familial Alzheimer's disease , is defined by the presence of mutations in one of several specific genes., symptoms develop significantly sooner in life than with other forms, making it a serious concern for those at risk.associated with early-onset ADAD. As a dominant trait inherited on non-sex chromosomes, a child has a 50 percent chance of inheriting the mutated version of the gene if one parent has the disease.
Alzheimer's disease currently has no known cause or cure, and that's part of what makes it so difficult to diagnose. Biological changes ramp up in the background for years before they have any clear physiological effects. Compared to 42 of their relatives without a mutation, the authors noticed three biomarkers that were closely associated with ADAD: plasma phosphorylated tau , neurofilament light chain , andAll three are potential biomarkers of the disease, but the changes to GFAP were noticed in blood plasma well before P-tau181 or NfL, about 10 years before any symptoms were estimated to begin.
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