Plasma apolipoprotein E levels in longitudinally followed patients with mild cognitive impairment and Alzheimer's disease
BACKGROUND: Low levels of plasma apolipoprotein E (apoE) and presence of the APOE ε4 allele are associated with an increased risk of Alzheimer's disease (AD). Although the increased risk of AD in APOE ε4-carriers is well-established, the protein levels have received limited attention.METHODS: We here report the total plasma apoE and apoE isoform levels at baseline from a longitudinally (24 months)