Objective: To investigate the clinical characteristics and analyze spastin gene mutation on a kindred with hereditary spastic paraplegia (HSP).
Methods: All family members were studied through clinical examinations. The proband and another two patients in this kindred were subjected to electromyography (EMG) examinations. The proband was subjected to thoracic MRI examination too. Mutation analysis of spastin gene was screened by polymerase chain reaction combined with DNA sequencing in the proband and his father.
Results: All patients in the kindred manifested as classical HSP. Thoracic MRI revealed atrophies of the spinal cord in the proband. No abnormal spastin gene mutation was detected in these two patients.
Conclusion: This kindred has typical clinical manifestations of HSP. The pathogenesis has no association with mutation of the exons of spastin gene.
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Eur J Neurol
January 2025
Service de Génétique Médicale, CHU Bordeaux, Bordeaux, France.
Purpose: Heterozygous pathogenic variants in SPAST are known to cause Hereditary Spastic Paraplegia 4 (SPG4), the most common form of HSP, characterized by progressive bilateral lower limbs spasticity with frequent sphincter disorders. However, there are very few descriptions in the literature of patients carrying biallelic variants in SPAST.
Methods: Targeted Sanger sequencing, panel sequencing and exome sequencing were used to identify the genetic causes in 9 patients from 6 unrelated families with symptoms of HSP or infantile neurodegenerative disorder.
Nan Fang Yi Ke Da Xue Xue Bao
November 2024
Department of Reproductive Medicine, Jinling Clinical Medical College, Nanjing University of Chinese Medicine, Nanjng 210002, China.
Mov Disord
November 2024
Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.
J Transl Med
September 2024
Department of Neurology, Peking Union Medical College, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China.
iScience
September 2024
Genethon, 91000 Evry, France.
Mitochondria-endoplasmic reticulum (ER) contact sites (MERCs) emerged to play critical roles in numerous cellular processes, and their dysregulation has been associated to neurodegenerative disorders. Mutations in the SPG4 gene coding for spastin are among the main causes of hereditary spastic paraplegia (HSP). Spastin binds and severs microtubules, and the long isoform of this protein, namely M1, spans the outer leaflet of ER membrane where it interacts with other ER-HSP proteins.
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