title: Hereditary spastic paraplegia-like disorder due to a mitochondrial ATP6 gene point mutation.
abstract: Hereditary spastic paraplegia refers to a genetically heterogeneous syndrome. We identified five members of a family suffering from a late-onset spastic paraplegia-like disorder, carrying the homoplasmic m.9176 T>C mutation in the mitochondrial ATP6 gene. The clinical severity of the disease observed in the family was correlated with the biochemical and assembly defects of the ATP synthase. The m.9176 T>C mutation has been previously associated to Leigh syndrome or familial bilateral striatal necrosis. Other factors such as modifying genes may be involved in the phenotypic expression of the disease. The family belongs to the mitochondrial haplogroup J, previously shown to play a role in modulating the phenotype of mitochondrial diseases and be associated with longevity. Moreover other nuclear modifying genes or environmental factors may contribute to the disease phenotype. This finding extends the genetic heterogeneity of the hereditary spastic paraplegia together with the clinical spectrum of mutations of the ATP6 gene.
authors.affiliation: Department of Neurology, Angers University Hospital, School of Medicine, Angers F-49000, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Verny
authors.forename: Naig
authors.initials: N
authors.lastname: Guegen
authors.forename: Valerie
authors.initials: V
authors.lastname: Desquiret
authors.forename: Arnaud
authors.initials: A
authors.lastname: Chevrollier
authors.forename: Adriana
authors.initials: A
authors.lastname: Prundean
authors.forename: Frederic
authors.initials: F
authors.lastname: Dubas
authors.forename: Julien
authors.initials: J
authors.lastname: Cassereau
authors.forename: Marc
authors.initials: M
authors.lastname: Ferre
authors.forename: Patrizia
authors.initials: P
authors.lastname: Amati-Bonneau
authors.forename: Dominique
authors.initials: D
authors.lastname: Bonneau
authors.forename: Pascal
authors.initials: P
authors.lastname: Reynier
authors.forename: Vincent
authors.initials: V
authors.lastname: Procaccio
mesh_terms: D000328:Adult; D004272:DNA, Mitochondrial / Q000032:analysis / Q000235:genetics; D005260:Female; D050259:Genes, Mitochondrial; D006801:Humans; D008297:Male; D008875:Middle Aged; D008928:Mitochondria / Q000201:enzymology* / Q000235:genetics; D025261:Mitochondrial Proton-Translocating ATPases / Q000235:genetics* / Q000378:metabolism; D010641:Phenotype; D017354:Point Mutation; D015419:Spastic Paraplegia, Hereditary / Q000235:genetics*
chemical_list: D004272:DNA, Mitochondrial; C412204:ATP synthase subunit 6; D025261:Mitochondrial Proton-Translocating ATPases