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Griswold AJ, Rajabli F, Gu T, Arvizu J, Golightly CG, Whitehead PL, Hamilton-Nelson KL, Adams LD, Sanchez JJ, Mena PR, Starks TD, Illanes-Manrique M, Silva C, Bush WS, Cuccaro ML, Vance JM, Cornejo-Olivas MR, Feliciano-Astacio BE, Byrd GS, Beecham GW, Haines JL, Pericak-Vance MA. Generalizability of Tau and Amyloid Plasma Biomarkers in Alzheimer's Disease Cohorts of Diverse Genetic Ancestries. medRxiv 2024:2024.04.10.24305617. [PMID: 38645114 PMCID: PMC11030471 DOI: 10.1101/2024.04.10.24305617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Introduction Plasma phosphorylated threonine-181 of Tau and amyloid beta are biomarkers for differential diagnosis and preclinical detection of Alzheimer disease (AD). Given differences in AD risk across diverse populations, generalizability of existing biomarker data is not assured. Methods In 2,086 individuals of diverse genetic ancestries (African American, Caribbean Hispanic, and Peruvians) we measured plasma pTau-181 and Aβ42/Aβ40. Differences in biomarkers between cohorts and clinical diagnosis groups and the potential discriminative performance of the two biomarkers were assessed. Results pTau-181 and Aβ42/Aβ40 were consistent across cohorts. Higher levels of pTau181 were associated with AD while Aβ42/Aβ40 had minimal differences. Correspondingly, pTau-181 had greater predictive value than Aβ42/Aβ40, however, the area under the curve differed between cohorts. Discussion pTau-181 as a plasma biomarker for clinical AD is generalizable across genetic ancestries, but predictive value may differ. Combining genomic and biomarker data from diverse individuals will increase understanding of genetic risk and refine clinical diagnoses.
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Affiliation(s)
- Anthony J Griswold
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Farid Rajabli
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Tianjie Gu
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Jamie Arvizu
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Charles G Golightly
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Patrice L Whitehead
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Kara L Hamilton-Nelson
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Larry D Adams
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Jose Javier Sanchez
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Pedro R Mena
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
| | - Takiyah D Starks
- Maya Angelou Center for Health Equity, Wake Forest University, Winston-Salem, NC, 27102, USA
| | | | - Concepcion Silva
- Department of Internal Medicine, Universidad Central Del Caribe, Bayamón, Puerto Rico, 00960, USA
| | - William S Bush
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, 44106, USA
- Cleveland Institute for Computational Biology, Cleveland, OH, 44106, USA
| | - Michael L Cuccaro
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Jeffery M Vance
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Mario R Cornejo-Olivas
- Neurogenetics Research Center, Instituto Nacional de Ciencias Neurologicas, Lima, 15003, Peru
| | | | - Goldie S Byrd
- Maya Angelou Center for Health Equity, Wake Forest University, Winston-Salem, NC, 27102, USA
| | - Gary W Beecham
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Jonathan L Haines
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, 44106, USA
- Cleveland Institute for Computational Biology, Cleveland, OH, 44106, USA
| | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33136, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
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