Journal
EXPERT REVIEW OF NEUROTHERAPEUTICS
Volume 19, Issue 5, Pages 409-415Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14737175.2019.1608824
Keywords
Spasticity; neurodegenerative diseases; hereditary spastic paraplegias; neurogenetic; motor neuron disease; phenotype-genotype correlations
Categories
Funding
- European Union
- Erare program
- ministry of higher education of Sudan
- Campus France
- Spastic Paraplegia Foundation
- Strumpell-Lorrain and Connaitre les Syndromes Cerebelleux patient associations
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Introduction: Hereditary spastic paraplegias (HSPs) are heterogeneous neurodegenerative disorders characterized by progressive lower limb weakness and spasticity as core symptoms of the degeneration of the corticospinal motor neurons. Even after exclusion of infectious and toxic mimickers of these disorders, the definitive diagnosis remains tricky, mainly in sporadic forms, as there is significant overlap with other disorders. Since their first description, various attempts failed to reach an appropriate classification. This was due to the constant expansion of the clinical spectrum of these diseases and the discovery of new genes, a significant number of them was involved in overlapping diseases.Areas covered: In this perspective review, an extensive literature study was conducted on the historical progress of HSP research. We also revised the previous and the current classifications of HSP and the closely related neurogenetic disorders and analyzed the areas of overlap.Expert opinion: There is undeniable need for objective case definition and reclassification of all neurogenetic disorders including HSPs, a prerequisite to improve patient follow-up, biomarker identification and develop therapeutics. The challenge is to understand why mutations can give rise to multiple phenotypic presentations along this spectrum of diseases in which the corticospinal tract is affected.
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