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The Association Between Plasma α-Synuclein (α-syn) Protein, Urinary Alzheimer-Associated Neuronal Thread Protein (AD7c-NTP), and Apolipoprotein Epsilon 4 (ApoE ε4) Alleles and Cognitive Decline in 60 Patients with Alzheimer's Disease Compared with 28 Age-Matched Normal Individuals.


ABSTRACT: BACKGROUND Accumulating evidence has shown that alpha-synuclein (alpha-syn) pathology is involved in the pathophysiology of Alzheimer's disease (AD). This study aimed to investigate the association between the levels of plasma alpha-syn protein, urinary Alzheimer-associated neuronal thread protein (AD7c-NTP), apolipoprotein epsilon 4 (ApoE ε4) alleles and cognitive decline in 60 AD patients compared with 28 age-matched normal controls (NCs) at a single center. MATERIAL AND METHODS All participants underwent alpha-syn, apolipoprotein E (ApoE), AD7c-NTP, cholesterol (CHO), high-density lipoprotein (HDL), low-density lipoprotein (LDL) and triglycerides (TGs) analyses, neuropsychological scale assessments and neuroimaging analysis. Moreover, urine and peripheral blood samples were collected from all participants. The levels of plasma alpha-syn and AD7c-NTP were assayed using an enzyme-linked immunosorbent assay (ELISA) kit. Other test results were obtained from China-Japan Friendship Hospital. RESULTS We found that plasma alpha-syn levels were significantly different between AD patients and NCs (p=0.045). alpha-Syn levels were also associated with AD7c-NTP (r=0.231, p=0.03) but not ApoE e4 (Z=-0.147, p=0.883) levels. Neither a-syn [CHO (p=0.432), HDL (p=0.484), LDL (p=0.733) or TGs (p=0.253)] nor AD7c-NTP [CHO (p=0.867), HDL (p=0.13), LDL (p=0.57) or TGs (p=0.678)] had a relationship with lipids. CONCLUSIONS This study showed that the levels of plasma alpha-syn protein and urinary AD7c-NTP were significantly increased in AD patients compared with NCs, but not with ApoE alleles or serum lipid levels.

SUBMITTER: Lv S 

PROVIDER: S-EPMC8325392 | biostudies-literature |

REPOSITORIES: biostudies-literature

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