Subpopulations in Alzheimer’s Disease alzheon
Subpopulations in Alzheimer’s disease
While there are many known genetic risk factors for late onset Alzheimer’s, APOE4 genotype has the strongest link to disease onset and severity, accelerating both the disease course and brain pathology. APOE is a human gene that encodes for a lipid-carrying protein called apolipoprotein E, which combines with fats to form lipoproteins that can be moved throughout the body. In the brain, apolipoprotein E helps shuttle cholesterol to neurons to support their normal function.
There are three alleles, or forms, of APOE, called ε2, ε3 and ε4. The ε4 allele (APOE4) has been found to correlate with increased risk of developing Alzheimer’s disease. People who inherit one copy of the ε4 allele have an increased chance of developing the disease, while those who inherit two copies of the allele (homozygous or APOE4/4) are at even greater risk and tend to have more aggressive disease. APOE4 is overrepresented in the Alzheimer’s population compared to the general population. Our target population, homozygotes, represent 15% of Alzheimer’s disease patients, and account for 530,000 patients in the U.S. alone.
65% of patients diagnosed with Alzheimer’s disease carry at least one copy of APOE4 gene.
Of those, 15% carry two copies of APOE4 gene (homozygous for APOE4 gene).
25% of the general population carry at least one copy of APOE4 gene, therefore, at high risk for development of Alzheimer’s disease.
Homozygotes represent 15% of Alzheimer’s disease patients