Volume 79, Issue 2 pp. 272-287
Research Article

Deep clinical and neuropathological phenotyping of Pick disease

David J. Irwin MD

Corresponding Author

David J. Irwin MD

University of Pennsylvania Frontotemporal Degeneration Center, Department of Neurology, University of Pennsylvania, Philadelphia, PA

Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA

Address correspondence to Dr Irwin, Frontotemporal Degeneration Center/Center for Neurodegenerative Disease Research, University of Pennsylvania Perelman School of Medicine, Hospital of the University of Pennsylvania, 3600 Spruce Street, Philadelphia, PA 19104. E-mail: [email protected]Search for more papers by this author
Johannes Brettschneider MD

Johannes Brettschneider MD

Department of Neurology, Herford Hospital, Herford, Germany

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Corey T. McMillan PhD

Corey T. McMillan PhD

University of Pennsylvania Frontotemporal Degeneration Center, Department of Neurology, University of Pennsylvania, Philadelphia, PA

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Felicia Cooper MS

Felicia Cooper MS

University of Pennsylvania Frontotemporal Degeneration Center, Department of Neurology, University of Pennsylvania, Philadelphia, PA

Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA

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Christopher Olm MS

Christopher Olm MS

University of Pennsylvania Frontotemporal Degeneration Center, Department of Neurology, University of Pennsylvania, Philadelphia, PA

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Steven E. Arnold MD

Steven E. Arnold MD

Brain-Behavior Laboratory, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA

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Vivianna M. Van Deerlin MD, PhD

Vivianna M. Van Deerlin MD, PhD

Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA

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William W. Seeley MD

William W. Seeley MD

Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA

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Bruce L. Miller MD

Bruce L. Miller MD

Memory and Aging Center, Department of Neurology, University of California, San Francisco, San Francisco, CA

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Edward B. Lee MD, PhD

Edward B. Lee MD, PhD

Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA

Translational Neuropathology Research Laboratory, University of Pennsylvania, Philadelphia, PA

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Virginia M.-Y. Lee PhD, MBA

Virginia M.-Y. Lee PhD, MBA

Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA

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Murray Grossman MD

Murray Grossman MD

University of Pennsylvania Frontotemporal Degeneration Center, Department of Neurology, University of Pennsylvania, Philadelphia, PA

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John Q. Trojanowski MD, PhD

John Q. Trojanowski MD, PhD

Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA

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First published: 19 November 2015
Citations: 166

Abstract

Objective

To characterize sequential patterns of regional neuropathology and clinical symptoms in a well-characterized cohort of 21 patients with autopsy-confirmed Pick disease.

Methods

Detailed neuropathological examination using 70μm and traditional 6μm sections was performed using thioflavin-S staining and immunohistochemistry for phosphorylated tau, 3R and 4R tau isoforms, ubiquitin, and C-terminally truncated tau. Patterns of regional tau deposition were correlated with clinical data. In a subset of cases (n = 5), converging evidence was obtained using antemortem neuroimaging measures of gray and white matter integrity.

Results

Four sequential patterns of pathological tau deposition were identified starting in frontotemporal limbic/paralimbic and neocortical regions (phase I). Sequential involvement was seen in subcortical structures, including basal ganglia, locus coeruleus, and raphe nuclei (phase II), followed by primary motor cortex and precerebellar nuclei (phase III) and finally visual cortex in the most severe (phase IV) cases. Behavioral variant frontotemporal dementia was the predominant clinical phenotype (18 of 21), but all patients eventually developed a social comportment disorder. Pathological tau phases reflected the evolution of clinical symptoms and degeneration on serial antemortem neuroimaging, directly correlated with disease duration and inversely correlated with brain weight at autopsy. The majority of neuronal and glial tau inclusions were 3R tau–positive and 4R tau–negative in sporadic cases. There was a relative abundance of mature tau pathology markers in frontotemporal limbic/paralimbic regions compared to neocortical regions.

Interpretation

Pick disease tau neuropathology may originate in limbic/paralimbic cortices. The patterns of tau pathology observed here provide novel insights into the natural history and biology of tau-mediated neurodegeneration. Ann Neurol 2016;79:272–287

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