title: Spectrum of JAG1 gene mutations in Polish patients with Alagille syndrome.
abstract: Alagille syndrome (ALGS) is an autosomal dominant disorder characterized by developmental abnormalities in several organs including the liver, heart, eyes, vertebrae, kidneys, and face. The majority (90-94%) of ALGS cases are caused by mutations in the JAG1 (JAGGED1) gene, and in a small percent of patients (∼1%) mutations in the NOTCH2 gene have been described. Both genes are involved in the Notch signaling pathway. To date, over 440 different JAG1 gene mutations and ten NOTCH2 mutations have been identified in ALGS patients. The present study was conducted on a group of 35 Polish ALGS patients and revealed JAG1 gene mutations in 26 of them. Twenty-three different mutations were detected including 13 novel point mutations and six large deletions affecting the JAG1 gene. Review of all mutations identified to date in individuals from Poland allowed us to propose an effective diagnostic strategy based on the mutations identified in the reported patients of Polish descent. However, the distribution of mutations seen in this cohort was not substantively different than the mutation distribution in other reported populations.
authors.affiliation: Department of Medical Genetics, The Children's Memorial Health Institute, Al. Dzieci Polskich 20, 04-730, Warsaw, Poland, d.jurkiewicz@czd.pl.
authors.forename: Dorota
authors.initials: D
authors.lastname: Jurkiewicz
authors.forename: Dorota
authors.initials: D
authors.lastname: Gliwicz
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Ciara
authors.forename: Jennifer
authors.initials: J
authors.lastname: Gerfen
authors.forename: Magdalena
authors.initials: M
authors.lastname: Pelc
authors.forename: Dorota
authors.initials: D
authors.lastname: Piekutowska-Abramczuk
authors.forename: Monika
authors.initials: M
authors.lastname: Kugaudo
authors.forename: Krystyna
authors.initials: K
authors.lastname: Chrzanowska
authors.forename: Nancy B
authors.initials: NB
authors.lastname: Spinner
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Krajewska-Walasek
mesh_terms: D016738:Alagille Syndrome / Q000175:diagnosis / Q000235:genetics*; D002135:Calcium-Binding Proteins / Q000235:genetics*; D004252:DNA Mutational Analysis; D005190:Family; D005260:Female; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics*; D000072100:Jagged-1 Protein; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D009154:Mutation / Q000235:genetics*; D011044:Poland; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D000072099:Serrate-Jagged Proteins
chemical_list: D002135:Calcium-Binding Proteins; D036341:Intercellular Signaling Peptides and Proteins; C000606273:JAG1 protein, human; D000072100:Jagged-1 Protein; D008565:Membrane Proteins; D000072099:Serrate-Jagged Proteins
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