title: p16 mutations/deletions are not frequent events in prostate cancer.
abstract: Cyclin-dependent kinase-4 inhibitor gene (p16INK4) has recently been mapped to chromosome 9p21. Homozygous deletions of this gene have been found at high frequency in cell lines derived from different types of tumours. These findings suggested therefore, that p16INK4 is a tumour-suppressor gene involved in a wide variety of human cancers. To investigate the frequency of p16INK mutations/deletions in prostate cancer, we screened 20 primary prostate tumours and four established cell lines by polymerase chain reaction (PCR) and single-strand conformation polymorphism (SSCP) analysis for exon 1 and exon 2. In contrast to most previous reports, no homozygous deletions were found in prostate cancer cell lines, but one cell line (DU145) has revealed to a mutation at codon 76. Only two SSCP shifts were detected in primary tumours: one of them corresponds to a mutation at codon 55 and the other one probably corresponds to a polymorphism. These data suggest that mutation of the p16INK4 gene is not a frequent genetic alteration implicated in prostate cancer development.
authors.affiliation: Department of Urology/Urological Research Laboratory, University Hospital Nijmegen, The Netherlands.
authors.forename: Y
authors.initials: Y
authors.lastname: Tamimi
authors.forename: P P
authors.initials: PP
authors.lastname: Bringuier
authors.forename: F
authors.initials: F
authors.lastname: Smit
authors.forename: A
authors.initials: A
authors.lastname: van Bokhoven
authors.forename: F M
authors.initials: FM
authors.lastname: Debruyne
authors.forename: J A
authors.initials: JA
authors.lastname: Schalken
mesh_terms: D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics*; D019941:Cyclin-Dependent Kinase Inhibitor p16; D005091:Exons; D017353:Gene Deletion; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D011471:Prostatic Neoplasms / Q000235:genetics*; D014407:Tumor Cells, Cultured
chemical_list: D002352:Carrier Proteins; D019941:Cyclin-Dependent Kinase Inhibitor p16