title: A single EFEMP1 mutation associated with both Malattia Leventinese and Doyne honeycomb retinal dystrophy.
abstract: Malattia Leventinese (ML) and Doyne honeycomb retinal dystrophy (DHRD) refer to two autosomal dominant diseases characterized by yellow-white deposits known as drusen that accumulate beneath the retinal pigment epithelium (RPE). Both loci were mapped to chromosome 2p16-21 (refs 5,6) and this genetic interval has been subsequently narrowed. The importance of these diseases is due in large part to their close phenotypic similarity to age-related macular degeneration (AMD), a disorder with a strong genetic component that accounts for approximately 50% of registered blindness in the Western world. Just as in ML and DHRD, the early hallmark of AMD is the presence of drusen. Here we use a combination of positional and candidate gene methods to identify a single non-conservative mutation (Arg345Trp) in the gene EFEMP1 (for EGF-containing fibrillin-like extracellular matrix protein 1) in all families studied. This change was not present in 477 control individuals or in 494 patients with age-related macular degeneration. Identification of this mutation may aid in the development of an animal model for drusen, as well as in the identification of other genes involved in human macular degeneration.
authors.affiliation: The Department of Ophthalmology, The University of Iowa College of Medicine, Iowa City, USA. edwin-stone@uiowa.edu
authors.forename: E M
authors.initials: EM
authors.lastname: Stone
authors.forename: A J
authors.initials: AJ
authors.lastname: Lotery
authors.forename: F L
authors.initials: FL
authors.lastname: Munier
authors.forename: E
authors.initials: E
authors.lastname: Héon
authors.forename: B
authors.initials: B
authors.lastname: Piguet
authors.forename: R H
authors.initials: RH
authors.lastname: Guymer
authors.forename: K
authors.initials: K
authors.lastname: Vandenburgh
authors.forename: P
authors.initials: P
authors.lastname: Cousin
authors.forename: D
authors.initials: D
authors.lastname: Nishimura
authors.forename: R E
authors.initials: RE
authors.lastname: Swiderski
authors.forename: G
authors.initials: G
authors.lastname: Silvestri
authors.forename: D A
authors.initials: DA
authors.lastname: Mackey
authors.forename: G S
authors.initials: GS
authors.lastname: Hageman
authors.forename: A C
authors.initials: AC
authors.lastname: Bird
authors.forename: V C
authors.initials: VC
authors.lastname: Sheffield
authors.forename: D F
authors.initials: DF
authors.lastname: Schorderet
mesh_terms: D000375:Aging; D019943:Amino Acid Substitution; D000818:Animals; D002874:Chromosome Mapping; D018244:Chromosomes, Artificial, Yeast; D002889:Chromosomes, Human, Pair 2; D003317:Corneal Dystrophies, Hereditary / Q000235:genetics* / Q000503:physiopathology; D016326:Extracellular Matrix Proteins / Q000235:genetics*; D005260:Female; D005451:Fluorescein Angiography; D005786:Gene Expression Regulation; D006801:Humans; D008297:Male; D051379:Mice; D010857:Pigment Epithelium of Eye / Q000473:pathology; D017354:Point Mutation; D015593:Retinal Drusen / Q000235:genetics* / Q000503:physiopathology; D014158:Transcription, Genetic
chemical_list: C119630:EFEMP1 protein, human; C492278:Efemp1 protein, mouse; D016326:Extracellular Matrix Proteins