title: [Mutation analysis in a family of Leber hereditary optic neuropathy].
abstract: OBJECTIVE
  To identify the disease-causing mutation in a family of Leber hereditary optic neuropathy (LHON).
  
  
  METHODS
  Clinical data and family information were collected. Peripheral venous blood was drawn from patients and family members who agreed to donate the blood samples. Genomic DNA was extracted from blood leukocytes. Three primary mitochondrial DNA (mtDNA) mutations, G3460A, G11778A, and T14484C were screened using a method of polymerase chain reaction (PCR) followed by direct sequencing.
  
  
  RESULTS
  This 3-generation family had 14 members. Seven family members were affected, including 5 female patients and 2 male patients. Pedigree analysis showed maternal inheritance. Mutation analysis in 4 affected and 3 unaffected family members showed G11778A mutation in all 4 affected and 2 of the 3 unaffected individuals.
  
  
  CONCLUSIONS
  G11778A mutation in mtDNA is the disease-causing mutation in this family of LHON. For the mutation carriers, early intervention may prevent or delay the onset of the disease.
authors.affiliation: Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Sciences Key Laboratory, Beijing 100730, China.
authors.forename: Chong-yang
authors.initials: CY
authors.lastname: She
authors.forename: Hong
authors.initials: H
authors.lastname: Gu
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Kai
authors.initials: K
authors.lastname: Ma
authors.forename: Ning-pu
authors.initials: NP
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D004252:DNA Mutational Analysis; D004272:DNA, Mitochondrial / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation; D029242:Optic Atrophy, Hereditary, Leber / Q000235:genetics*; D010375:Pedigree; D055815:Young Adult
chemical_list: D004272:DNA, Mitochondrial