Misfolded α‐Synuclein in Cerebrospinal Fluid of Contact Sport Athletes

Author:

Vasilevskaya Anna123ORCID,Martinez‐Valbuena Ivan1ORCID,Anastassiadis Chloe123,Taghdiri Foad13,Khodadadi Mozhgan4,Tarazi Apameh34,Green Robin45,Colella Brenda45,Wennberg Richard34,Mikulis David246,Davis Karen Deborah2478,Kovacs Gabor G.1910ORCID,Tator Charles2411,Tartaglia Maria Carmela1234ORCID

Affiliation:

1. Tanz Centre for Research in Neurodegenerative Diseases University of Toronto Toronto Ontario Canada

2. Institute of Medical Science University of Toronto Toronto Ontario Canada

3. Division of Neurology Toronto Western Hospital, University Health Network Toronto Ontario Canada

4. Canadian Concussion Centre Toronto Western Hospital, Krembil Neuroscience Centre, University Health Network Toronto Ontario Canada

5. KITE Research Institute, University Health Network Toronto Ontario Canada

6. Division of Neuroradiology, Joint Department of Medical Imaging University Health Network Toronto Ontario Canada

7. Department of Surgery University of Toronto Toronto Ontario Canada

8. Division of Brain, Imaging, and Behaviour; Krembil Brain Institute University Health Network Toronto Ontario Canada

9. Department of Laboratory Medicine and Pathobiology University of Toronto Toronto Ontario Canada

10. Laboratory Medicine Program and Krembil Brain Institute University Health Network Toronto Ontario Canada

11. Division of Neurosurgery Toronto Western Hospital, Krembil Brain Institute, University Health Network Toronto Ontario Canada

Abstract

AbstractBackgroundMisfolded α‐synuclein in Parkinson's disease (PD) and dementia with Lewy bodies (DLB) can be detected using the real‐time quaking‐induced conversion (RT‐QuIC) technique in cerebrospinal fluid (CSF).ObjectivesThe objectives are (1) to examine misfolded CSF α‐synuclein incidence, and (2) to compare clinical presentation, sports history, brain volumes, and RT‐QuIC α‐synuclein positivity in former athletes.MethodsThirty former athletes with magnetic resonance imaging, neuropsychological testing, and CSF analyzed for phosphorylated tau 181 (p‐tau), total tau (t‐tau), amyloid‐β 42 (Aβ42), and neurofilament light chain (NfL). CSF α‐synuclein was detected using RT‐QuIC.ResultsSix (20%) former athletes were α‐synuclein positive. α‐Synuclein positive athletes were similar to α‐synuclein negative athletes on demographics, sports history, clinical features, CSF p‐tau, t‐tau, Aβ42, and NfL; however, had lower grey matter volumes in the right inferior orbitofrontal, right anterior insula and right olfactory cortices.Conclusionsα‐Synuclein RT‐QuIC analysis of CSF may be useful as a prodromal biofluid marker of PD and DLB. © 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.

Funder

Edmond J. Safra Philanthropic Foundation

Krembil Foundation

Physicians' Services Incorporated Foundation

Toronto General and Western Hospital Foundation

Publisher

Wiley

Subject

Neurology (clinical),Neurology

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