Journal
YEAR IN NEUROLOGY AND PSYCHIATRY
Volume 1338, Issue -, Pages 71-93Publisher
BLACKWELL SCIENCE PUBL
DOI: 10.1111/nyas.12638
Keywords
frontotemporal dementia; amyotrophic lateral sclerosis; motor neuron disease; neuromuscular disease; C9ORF72
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Funding
- NATIONAL INSTITUTE ON AGING [P01AG019724] Funding Source: NIH RePORTER
- NIA NIH HHS [P01 AG019724] Funding Source: Medline
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The concept that frontotemporal dementia (FTD) is a purely cortical dementia has largely been refuted by the recognition of its close association with motor neuron disease, and the identification of transactive response DNA-binding protein 43 (TDP-43) as a major pathological substrate underlying both diseases. Genetic findings have transformed this field and revealed connections between disorders that were previous thought clinically unrelated. The discovery that the C9ORF72 locus is responsible for the majority of hereditary FTD, amyotrophic lateral sclerosis (ALS), and FTD-ALS cases and the understanding that repeat-containing RNA plays a crucial role in pathogenesis of both disorders has paved the way for the development of potential biomarkers and therapeutic targets for these devastating diseases. In this review, we summarize the historical aspects leading up to our current understanding of the genetic, clinical, and neuropathological overlap between FTD and ALS, and include brief discussions on chronic traumatic encephalopathy (CTE), given its association with TDP-43 pathology, its associated increased dementia risk, and reports of ALS in CTE patients. In addition, we describe other genetic associations between dementia and neuromuscular disease, such as inclusion body myositis with Paget's disease and FTD.
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