The Association of Alzheimer's Disease-Related Blood-Based Biomarkers with Cognitive Screening Test Performance in the Congolese Population in Kinshasa.
J Alzheimers Dis
; 97(3): 1353-1363, 2024.
Article
in En
| MEDLINE
| ID: mdl-38306056
ABSTRACT
BACKGROUND:
Alzheimer's disease (AD), the most common cause of dementia, poses a significant global burden. Diagnosis typically involves invasive and costly methods like neuroimaging or cerebrospinal fluid (CSF) biomarker testing of phosphorylated tau (p-tau) and amyloid-ß42/40 (Aß42/40). Such procedures are especially impractical in resource-constrained regions, such as the Democratic Republic of Congo (DRC). Blood-based biomarker testing may provide a more accessible screening opportunity.OBJECTIVE:
This study aims to examine if AD-related blood-based biomarkers are associated with cognitive test performance in the Congolese population, where limited research has been conducted.METHODS:
In this cross-sectional study of 81 Congolese individuals, cognitive assessments (Alzheimer's Questionnaire (AQ) and Community Screening Interview for Dementia (CSID)) distinguished dementia cases from controls. Blood draws were taken to assess p-tau 181 and Aß42/40 biomarkers. Relationships between the biomarkers and cognitive performance were analyzed using multiple linear regression models.RESULTS:
Lower plasma Aß42/40 was significantly associated with lower CSID scores and higher AQ scores, indicative of AD (pâ<â0.001). These relationships were observed in healthy controls (CSID pâ=â0.01, AQ pâ=â0.03), but not in dementia cases. However, p-tau 181 did not exhibit significant associations with either measure. Factors such as age, sex, education, presence of APOEÉ4 allele, did not alter these relationships.CONCLUSIONS:
Understanding relationships between AD-related screening tests and blood biomarkers is a step towards utilization of blood-based biomarker tests as a screening tool for AD, especially in resource-limited regions. Further research should be conducted to evaluate blood biomarker test efficacy in larger samples and other populations.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Alzheimer Disease
/
Cognitive Dysfunction
Type of study:
Diagnostic_studies
/
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
/
Screening_studies
Limits:
Humans
Country/Region as subject:
Africa
Language:
En
Journal:
J Alzheimers Dis
Journal subject:
GERIATRIA
/
NEUROLOGIA
Year:
2024
Document type:
Article
Affiliation country: