A p.Arg499His mutation in SPAST is associated with infantile-onset complicated spastic paraplegia: a case report and review of the literature.
BMC Neurol
; 21(1): 439, 2021 Nov 09.
Article
en En
| MEDLINE
| ID: mdl-34753439
ABSTRACT
BACKGROUND:
Spastic paraplegia type 4 (SPG4) is caused by mutations in the SPAST gene, is the most common form of autosomal-dominant pure hereditary spastic paraplegias (HSP), and is rarely associated with a complicated form that includes ataxia, epilepsy, and cognitive decline. To date, the genotype-phenotype correlation has not been substantially established for SPAST mutations. CASE PRESENTATION We present a Japanese patient with infantile-onset HSP and a complex form with coexisting ataxia and epilepsy. The sequencing of SPAST revealed a de novo c.1496G > A (p.R499H) mutation. A review of the literature revealed 16 additional patients with p.R499H mutations in SPAST associated with an early-onset complicated form of HSP. We found that the complicated phenotype of patients with p.Arg499His mutations could be mainly divided into three subgroups (1) infantile-onset ascending hereditary spastic paralysis, (2) HSP with severe dystonia, and (3) HSP with cognitive impairment. Moreover, the c.1496G > A mutation in SPAST may occur as a de novo variant at noticeably high rates.CONCLUSION:
We reviewed the clinical features of the patients reported in the literature with the p.Arg499His mutation in SPAST and described the case of a Japanese patient with this mutation presenting a new complicated form. Accumulating evidence suggests a possible association between infantile-onset complicated HSP and the p.Arg499His mutation in SPAST. The findings of this study may expand the clinical spectrum of the p.Arg499His mutation in SPAST and provide an opportunity to further study the genotype-phenotype correlation of SPG4.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Paraplejía Espástica Hereditaria
Tipo de estudio:
Risk_factors_studies
Límite:
Humans
Idioma:
En
Revista:
BMC Neurol
Asunto de la revista:
NEUROLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Japón