Proteomics-derived Cerebrospinal Fluid Markers of Autopsy-confirmed Alzheimer's Disease
Overview
Affiliations
The diagnostic performance of several candidate cerebrospinal fluid (CSF) protein biomarkers in neuropathologically confirmed Alzheimer's disease (AD), non-demented (ND) elderly controls and non-AD dementias (NADD) was assessed. Candidate markers were selected on the basis of initial two-dimensional gel electrophoresis studies or by literature review. Markers selected by the former method included apolipoprotein A-1 (ApoA1), haemopexin (HPX), transthyretin (TTR) and pigment epithelium-derived factor (PEDF), while markers identified from the literature included Abeta1-40, Abeta1-42, total tau, phosphorylated tau, alpha-1 acid glycoprotein (A1GP), haptoglobin, zinc alpha-2 glycoprotein (Z2GP) and apolipoprotein E (ApoE). Ventricular CSF concentrations of the markers were measured by enzyme-linked immunosorbent assay (ELISA). The concentrations of Abeta1-42, ApoA1, A1GP, ApoE, HPX and Z2GP differed significantly among AD, ND and NADD subjects. Logistic regression analysis for the diagnostic discrimination of AD from ND found that Abeta1-42, ApoA1 and HPX each had significant and independent associations with diagnosis. The CSF concentrations of these three markers distinguished AD from ND subjects with 84% sensitivity and 72% specificity, with 78% of subjects correctly classified. By comparison, using Abeta1-42 alone gave 79% sensitivity and 61% specificity, with 68% of subjects correctly classified. For the diagnostic discrimination of AD from NADD, only the concentration of Abeta1-42 was significantly related to diagnosis, with a sensitivity of 58%, specificity of 86% and 86% correctly classified. The results indicate that for the discrimination of AD from ND control subjects, measurement of a set of markers including Abeta1-42, ApoA1 and HPX improved diagnostic performance over that obtained by measurement of Abeta1-42 alone. For the discrimination of AD from NADD subjects, measurement of Abeta1-42 alone was superior.
C M Moraes R, Roth J, Mao H, Crawley S, Xu B, Watson J Genes (Basel). 2024; 15(11).
PMID: 39596576 PMC: 11594465. DOI: 10.3390/genes15111376.
Liu B, Cui D, Liu J, Shi J Front Pharmacol. 2024; 15:1440515.
PMID: 39234102 PMC: 11371586. DOI: 10.3389/fphar.2024.1440515.
Kandi S, Cline E, Rivera B, Viola K, Zhu J, Condello C J Proteome Res. 2023; 22(11):3475-3488.
PMID: 37847596 PMC: 10840081. DOI: 10.1021/acs.jproteome.3c00353.
Apolipoprotein E in lipid metabolism and neurodegenerative disease.
Yang L, March Z, Stephenson R, Narayan P Trends Endocrinol Metab. 2023; 34(8):430-445.
PMID: 37357100 PMC: 10365028. DOI: 10.1016/j.tem.2023.05.002.
Sex-Specific Multiparameter Blood Test for the Early Diagnosis of Alzheimer's Disease.
Cho H, Schulz P, Venkataraman L, Caselli R, Sierks M Int J Mol Sci. 2022; 23(24).
PMID: 36555310 PMC: 9779188. DOI: 10.3390/ijms232415670.