Variation in MAPT is not a contributing factor to the incomplete penetrance in LHON.

TitleVariation in MAPT is not a contributing factor to the incomplete penetrance in LHON.
Publication TypeJournal Article
Year of Publication2011
AuthorsHudson, G, Yu-Wai-Man, P, Griffiths, PG, Horvath, R, Carelli, V, Zeviani, M, Chinnery, PF
JournalMitochondrion
Volume11
Issue4
Pagination620-2
Date Published2011 Jul
ISSN1872-8278
KeywordsAge of Onset, Blindness, Cohort Studies, DNA, Mitochondrial, Female, Gene Frequency, Haplotypes, Heterozygote, Humans, Male, Mutation, Optic Atrophy, Hereditary, Leber, Penetrance, Polymorphism, Single Nucleotide, Risk Factors, tau Proteins, Young Adult
Abstract

Leber's hereditary optic neuropathy (LHON) is a common cause of inherited blindness, primarily due to one of three mitochondrial DNA (mtDNA) mutations. LHON, which has an unexplained variable penetrance and pathology, is characterised by disruption of the mitochondrial respiratory chain ultimately resulting in degeneration of the retinal ganglion cells. Phosphorylation of the tau protein is known to cause neurodegeneration and variation in MAPT has been associated with a range of neurodegenerative disorders. Given the relationship between MAPT variation and altered mitochondrial respiratory chain function, we hypothesised that MAPT variation could contribute to the risk of blindness in LHON mtDNA mutation carriers. We studied MAPT variation in a large, well characterised LHON cohort, but were unable to find an association between MAPT genetic variation and visual failure in LHON mtDNA mutation carriers. Our findings suggest that genetic variation in MAPT is unlikely to make a major contribution to the risk of blindness among LHON mutation carriers.

DOI10.1016/j.mito.2011.03.004
Alternate JournalMitochondrion
Citation Key10.1016/j.mito.2011.03.004
PubMed ID21397051
PubMed Central IDPMC3115022
Grant ListJ-0804 / / Parkinson's UK / United Kingdom
G0701386 / / Medical Research Council / United Kingdom
G1000848 / / Medical Research Council / United Kingdom
/ / Medical Research Council / United Kingdom
071095 / / Wellcome Trust / United Kingdom
G0601943 / / Medical Research Council / United Kingdom