Increased cerebrospinal fluid A beta38/A beta42 ratio in Alzheimer disease.

Abstract excerpt

We quantitated amyloid beta peptide (A beta) 38, A beta40 and A beta42 levels in matched CSF and plasma from Alzheimer disease (AD) patients and controls. CSF A beta38 and A beta40 levels were similar in AD patients and in controls; however, they were higher in controls with APOE upsilon4 allele than those without. CSF A beta42 levels were lower in AD patients than in controls. The CSF A beta38/42 ratio was...

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