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Leber's hereditary optic neuropathy with 14484 mutation in Central Java, Indonesia
Tomoki Nishioka1, Mamoru Tasaki, Augustinus Soemantri
1Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of Human Genetics
|June 27, 2003
Summary
Leber's hereditary optic neuropathy (LHON), a vision loss disease, was studied in an Indonesian family. The T14484C mitochondrial DNA mutation showed similar penetrance and male predominance, suggesting different genetic backgrounds in Southeast Asians.
Area of Science:
- Genetics
- Ophthalmology
- Mitochondrial Diseases
Background:
- Leber's hereditary optic neuropathy (LHON) is a maternally inherited condition causing vision loss.
- Specific mitochondrial DNA (mtDNA) mutations, like T14484C, are linked to LHON.
- Understanding genetic backgrounds is crucial for LHON research.
Purpose of the Study:
- To analyze the T14484C mutation in a six-generation Indonesian LHON family.
- To compare disease penetrance and characteristics with global LHON populations.
- To investigate potential differences in mtDNA backgrounds between Southeast Asian and European LHON cases.
Main Methods:
- Pedigree analysis across six generations.
- Polymerase chain reaction/restriction fragment length polymorphism (PCR/RFLP) for mutation detection.
- Haplogroup analysis.
Main Results:
- The T14484C mutation was found in a homoplasmic form in all maternal lineages.
- Disease penetrance (33.3%) and male predominance (3:1) were consistent with global data.
- Patients belonged to haplogroup M, suggesting distinct mtDNA backgrounds in Southeast Asians.
Conclusions:
- The Indonesian family's LHON presentation aligns with global patterns for the T14484C mutation.
- Findings support the hypothesis of differing mtDNA backgrounds influencing LHON expression in Southeast Asians compared to Europeans.