title: Germline PTCH1 mutations in Japanese basal cell nevus syndrome patients.
abstract: Basal cell nevus syndrome (BCNS or Gorlin syndrome, OMIM: 109400) is a rare autosomal dominant disorder with high penetrance. It is characterized by developmental anomalies and predisposition to tumors (for example, basal cell carcinoma (BCC) and medulloblastoma). PTCH1, the human homolog of the Drosophila patched gene, was identified as a gene responsible for BCNS. The PTCH1 protein is a Hedgehog (Hh) protein receptor and is pivotal for early development, stem cell maintenance and/or differentiation. We analyzed the six Japanese families with BCNS and identified six germline mutations in the PTCH1 gene. One family had a nonsense mutation (c.1196G>A), one had a 1-bp deletion (c.2029delA), two had 2-bp deletions (c.239_240delGA and c.1670_1671delCA) and one had a 58-bp duplication (c.1138_1195dup). They caused premature termination, resulting in the truncation of the PTCH1 protein. Analysis of a high-density single nucleotide polymorphism (SNP) mapping array showed a large approximately 1.2-Mb deletion, including the PTCH1 gene in one allele, in a family in which PTCH1 mutations were not identified at the sequence level. These data indicated that all the six families who were diagnosed with BCNS had mutations in the PTCH1 gene and that a single copy of a PTCH1 mutation causes BCNS.
authors: Department of Pediatrics, Hyogo College of Medicine, Nishinomiya, Japan.
authors: Chiaki
authors: C
authors: Takahashi
authors: Nozomi
authors: N
authors: Kanazawa
authors: Yoshie
authors: Y
authors: Yoshikawa
authors: Reigetsu
authors: R
authors: Yoshikawa
authors: Yuko
authors: Y
authors: Saitoh
authors: Hideaki
authors: H
authors: Chiyo
authors: Takakuni
authors: T
authors: Tanizawa
authors: Tomoko
authors: T
authors: Hashimoto-Tamaoki
authors: Yoshiro
authors: Y
authors: Nakano
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D001478:Basal Cell Nevus Syndrome / Q000235:genetics*; D001483:Base Sequence; D002648:Child; D002675:Child, Preschool; D056905:Chromosome Breakpoints; D005260:Female; D018095:Germ-Line Mutation / Q000235:genetics*; D006801:Humans; D007564:Japan; D008297:Male; D008969:Molecular Sequence Data; D020411:Oligonucleotide Array Sequence Analysis; D000072079:Patched Receptors; D000072081:Patched-1 Receptor; D010375:Pedigree; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D011956:Receptors, Cell Surface / Q000235:genetics*
chemical_list: C000606236:PTCH1 protein, human; D000072079:Patched Receptors; D000072081:Patched-1 Receptor; D011956:Receptors, Cell Surface