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Ashton NJ, Puig-Pijoan A, Milà-Alomà M, Fernández-Lebrero A, García-Escobar G, González-Ortiz F, Kac PR, Brum WS, Benedet AL, Lantero-Rodriguez J, Day TA, Vanbrabant J, Stoops E, Vanmechelen E, Triana-Baltzer G, Moughadam S, Kolb H, Ortiz-Romero P, Karikari TK, Minguillon C, Sánchez JJH, Navalpotro-Gómez I, Grau-Rivera O, Manero RM, Puente-Periz V, de la Torre R, Roquer J, Dage JL, Zetterberg H, Blennow K, Suárez-Calvet M. Plasma and CSF biomarkers in a memory clinic: Head-to-head comparison of phosphorylated tau immunoassays. Alzheimers Dement 2023; 19:1913-1924. [PMID: 36370462 PMCID: PMC10762642 DOI: 10.1002/alz.12841] [Citation(s) in RCA: 49] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/27/2022] [Accepted: 09/30/2022] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Direct comparisons of the main blood phosphorylated tau immunoassays in memory clinic populations are needed to understand possible differences. METHODS In the BIODEGMAR study, 197 participants presenting with cognitive complaints were classified into an Alzheimer's disease (AD) or a non-AD cerebrospinal fluid (CSF) profile group, according to their amyloid beta 42/ phosphorylated tau (Aβ42/p-tau) ratio. We performed a head-to-head comparison of nine plasma and nine CSF tau immunoassays and determined their accuracy to discriminate abnormal CSF Aβ42/p-tau ratio. RESULTS All studied plasma tau biomarkers were significantly higher in the AD CSF profile group compared to the non-AD CSF profile group and significantly discriminated abnormal CSF Aβ42/p-tau ratio. For plasma p-tau biomarkers, the higher discrimination accuracy was shown by Janssen p-tau217 (r = 0.76; area under the curve [AUC] = 0.96), ADx p-tau181 (r = 0.73; AUC = 0.94), and Lilly p-tau217 (r = 0.73; AUC = 0.94). DISCUSSION Several plasma p-tau biomarkers can be used in a specialized memory clinic as a stand-alone biomarker to detect biologically-defined AD. HIGHLIGHTS Patients with an Alzheimer's disease cerebrospinal fluid (AD CSF) profile have higher plasma phosphorylated tau (p-tau) levels than the non-AD CSF profile group. All plasma p-tau biomarkers significantly discriminate patients with an AD CSF profile from the non-AD CSF profile group. Janssen p-tau217, ADx p-tau181, and Lilly p-tau217 in plasma show the highest accuracy to detect biologically defined AD. Janssen p-tau217, ADx p-tau181, Lilly p-tau217, Lilly p-tau181, and UGot p-tau231 in plasma show performances that are comparable to their CSF counterparts.
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Affiliation(s)
- Nicholas J. Ashton
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Sweden
- King’s College London, Institute of Psychiatry, Psychology & Neuroscience, Maurice Wohl Clinical Neuroscience Institute, London, UK
- NIHR Biomedical Research Centre for Mental Health & Biomedical Research Unit for Dementia at South London & Maudsley NHS Foundation, London, UK
| | - Albert Puig-Pijoan
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marta Milà-Alomà
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - Aida Fernández-Lebrero
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
| | - Greta García-Escobar
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
| | - Fernándo González-Ortiz
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
| | - Przemysław R. Kac
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Wagner S. Brum
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
- Graduate Program in Biological Sciences: Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Andréa L. Benedet
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Juan Lantero-Rodriguez
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
| | - Theresa A. Day
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana, USA
| | | | - Erik Stoops
- ADx NeuroSciences, Technologiepark 94, Ghent, Belgium
| | | | | | - Setareh Moughadam
- Neuroscience Biomarkers Janssen Research & Development La Jolla California, USA
| | - Hartmuth Kolb
- Neuroscience Biomarkers Janssen Research & Development La Jolla California, USA
| | - Paula Ortiz-Romero
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
| | - Thomas K. Karikari
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Carolina Minguillon
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | | | - Irene Navalpotro-Gómez
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
| | - Oriol Grau-Rivera
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - Rosa María Manero
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Víctor Puente-Periz
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Rafael de la Torre
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (CEXS-UPF), Barcelona, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Madrid, Spain
| | - Jaume Roquer
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Jeff L. Dage
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
- Department of Neurodegenerative Disease, UCL Institute of Neurology, London, UK
- UK Dementia Research Institute at UCL, London, UK
- Hong Kong Center for Neurodegenerative Diseases, Hong Kong, China
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Marc Suárez-Calvet
- Cognitive Decline and Movement Disorders Unit, Neurology Department, Hospital del Mar, Barcelona, Spain
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
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Suárez‐Calvet M, Ashton NJ, Puig‐Pijoan A, Milà‐Alomà M, Fernández‐Lebrero A, García‐Escobar G, González‐Ortiz F, Kac PR, Brum WS, Benedet AL, Rodriguez JL, Day TA, Dage JL, Vanbrabant J, Stoops E, Vanmechelen E, Triana‐Baltzer G, Moughadam S, Kolb HC, Ortiz‐Romero P, Karikari TK, Minguillón C, Sánchez JJH, Navalpotro‐Gómez I, Grau‐Rivera O, Manero RM, Puente‐Periz V, de la Torre R, Roquer J, Zetterberg H, Blennow K. A head‐to‐head comparison of plasma phosphorylated tau assays in the real‐world memory clinic. Alzheimers Dement 2022. [DOI: 10.1002/alz.065391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Marc Suárez‐Calvet
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES) Madrid Spain
| | - Nicholas J. Ashton
- NIHR Biomedical Research Centre for Mental Health & Biomedical Research Unit for Dementia at South London & Maudsley NHS Foundation London United Kingdom
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
- Wallenberg Centre for Molecular and Translational Medicine; University of Gothenburg Gothenburg Sweden
- King’s College London, Institute of Psychiatry, Psychology & Neuroscience, Maurice Wohl Clinical Neuroscience Institute London United Kingdom
| | - Albert Puig‐Pijoan
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
- Department of Medicine, Universitat Autònoma de Barcelona Barcelona Spain
| | - Marta Milà‐Alomà
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES) Madrid Spain
- Universitat Pompeu Fabra Barcelona Spain
| | | | - Greta García‐Escobar
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
| | - Fernándo González‐Ortiz
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
| | - Przemyslaw Radoslaw Kac
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
| | - Wagner Scheeren Brum
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
- Graduate Program in Biological Sciences: Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre Brazil
| | - Andréa Lessa Benedet
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, University of Gothenburg Mölndal Sweden
| | - Juan Lantero Rodriguez
- Institute of Neuroscience & Physiology, Department of Psychiatry & Neurochemistry, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
| | - Theresa A. Day
- Lilly Research Laboratories, Eli Lilly and Company Indianapolis IN USA
| | - Jeffrey L. Dage
- Stark Neurosciences Research Institute, Indiana University School of Medicine Indianapolis IN USA
- Eli Lilly and Company Indianapolis IN USA
| | | | - Erik Stoops
- ADx NeuroSciences NV, Technologiepark 94 Ghent 9052 Belgium
| | | | | | | | | | - Paula Ortiz‐Romero
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
- IMIM (Hospital del Mar Medical Research Institute) Barcelona Spain
| | - Thomas K Karikari
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
| | - Carolina Minguillón
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES) Madrid Spain
| | | | - Irene Navalpotro‐Gómez
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
| | - Oriol Grau‐Rivera
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation Barcelona Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES) Madrid Spain
| | - Rosa María Manero
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
| | - Víctor Puente‐Periz
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
| | - Rafael de la Torre
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Universitat Pompeu Fabra Barcelona Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y la Nutrición (CIBEROBN) Madrid Spain
| | - Jaume Roquer
- Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
- Servei de Neurologia, Hospital del Mar Barcelona Spain
- Department of Medicine, Universitat Autònoma de Barcelona Barcelona Spain
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital Mölndal Sweden
- Hong Kong Center for Neurodegenerative Diseases Clear Water Bay Hong Kong
- Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square London United Kingdom
- UK Dementia Research Institute at UCL London United Kingdom
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg Mölndal Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital Mölndal Sweden
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Triana-Baltzer G, Van Kolen K, Theunis C, Moughadam S, Slemmon R, Mercken M, Galpern W, Sun H, Kolb H. Development and Validation of a High Sensitivity Assay for Measuring p217 + tau in Cerebrospinal Fluid. J Alzheimers Dis 2021; 77:1417-1430. [PMID: 32831201 PMCID: PMC7683057 DOI: 10.3233/jad-200463] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background: Early and accurate detection and staging is critical to managing Alzheimer’s disease (AD) and supporting clinical trials. Cerebrospinal fluid (CSF) biomarkers for amyloid-β peptides, tau species, and various neurodegenerative and inflammatory analytes are leading the way in this regard, yet there is room for improved sensitivity and specificity. In particular tau is known to be present in many different fragments, conformations, and post-translationally modified forms. While the exact tau species that might best reflect AD pathology is unknown, a growing body of evidence suggests that forms with high levels of phosphorylation in the mid-region may be especially enriched in AD. Objective: Develop an assay for measuring p217tau in CSF. Methods: Here we describe the development and validation of a novel sELISA for measuring CSF tau species containing phosphorylation at threonines 212 & 217, aka p217 + tau, using the PT3 antibody. Results: While the analyte is present at extremely low levels the assay is sufficiently sensitive and specific to quantitate p217 + tau with excellent precision, accuracy, and dilution linearity, allowing good differentiation between diagnostic subgroups. The p217 + tau measurements appear to track AD pathology better than the commonly used p181tau epitope, suggesting superior diagnostic and staging performance. Finally, the assay can also be configured to differentiate antibody-bound versus antibody-free tau, and therefore can be used to measure target engagement by p217 + tau-targeting immunotherapeutics. Conclusion: The assay for measuring p217 + tau described here is highly sensitive, accurate, precise, dilution linear, and shows good potential for identifying and staging AD.
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Affiliation(s)
| | - Kristof Van Kolen
- Neuroscience Department, Janssen Research and Development, Beerse, Belgium
| | - Clara Theunis
- Neuroscience Department, Janssen Research and Development, Beerse, Belgium
| | - Setareh Moughadam
- Neuroscience Biomarkers, Janssen Research & Development, La Jolla, CA, USA
| | - Randy Slemmon
- Neuroscience Biomarkers, Janssen Research & Development, La Jolla, CA, USA
| | - Marc Mercken
- Neuroscience Department, Janssen Research and Development, Beerse, Belgium
| | - Wendy Galpern
- Neuroscience Experimental Medicine, Janssen Research & Development, Titusville, NJ, USA
| | - Hong Sun
- Neuroscience Clinical Development, Janssen Research & Development, Titusville, NJ, USA
| | - Hartmuth Kolb
- Neuroscience Biomarkers, Janssen Research & Development, La Jolla, CA, USA
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4
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Simoes S, Neufeld JL, Triana-Baltzer G, Moughadam S, Chen EI, Kothiya M, Qureshi YH, Patel V, Honig LS, Kolb H, Small SA. Tau and other proteins found in Alzheimer's disease spinal fluid are linked to retromer-mediated endosomal traffic in mice and humans. Sci Transl Med 2021; 12:12/571/eaba6334. [PMID: 33239387 DOI: 10.1126/scitranslmed.aba6334] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/21/2020] [Accepted: 08/18/2020] [Indexed: 12/11/2022]
Abstract
Endosomal trafficking has emerged as a defective biological pathway in Alzheimer's disease (AD), and the pathway is a source of cerebrospinal fluid (CSF) protein accumulation. Nevertheless, the identity of the CSF proteins that accumulate in the setting of defects in AD's endosomal trafficking pathway remains unknown. Here, we performed a CSF proteomic screen in mice with a neuronal-selective knockout of the core of the retromer complex VPS35, a master conductor of endosomal traffic that has been implicated in AD. We then validated three of the most relevant proteomic findings: the amino terminus of the transmembrane proteins APLP1 and CHL1, and the mid-domain of tau, which is known to be unconventionally secreted and elevated in AD. In patients with AD dementia, the concentration of amino-terminal APLP1 and CHL1 in the CSF correlated with tau and phosphorylated tau. Similar results were observed in healthy controls, where both proteins correlated with tau and phosphorylated tau and were elevated in about 70% of patients in the prodromal stages of AD. Collectively, the mouse-to-human studies suggest that retromer-dependent endosomal trafficking can regulate tau, APLP1, and CHL1 CSF concentration, informing on how AD's trafficking pathway might contribute to disease spread and how to identify its trafficking impairments in vivo.
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Affiliation(s)
- Sabrina Simoes
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Jessica L Neufeld
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | | | - Setareh Moughadam
- Neuroscience Biomarkers, Janssen Research and Development, San Diego, CA 92121, USA
| | - Emily I Chen
- Thermo Fisher Precision Medicine Science Center, 790 Memorial Drive, Cambridge, MA 02139, USA
| | - Milankumar Kothiya
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Yasir H Qureshi
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Vivek Patel
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Lawrence S Honig
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA.,Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA.,Gertrude H. Sergievsky Center, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Hartmuth Kolb
- Neuroscience Biomarkers, Janssen Research and Development, San Diego, CA 92121, USA
| | - Scott A Small
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain and the Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA.
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