PMID- 7539284 OWN - NLM STAT- MEDLINE DCOM- 19950706 LR - 20191023 IS - 1045-2257 (Print) IS - 1045-2257 (Linking) VI - 12 IP - 4 DP - 1995 Apr TI - Visualization of INT2 and HST1 amplification in oral squamous cell carcinomas. PG - 288-95 AB - Oral squamous cell carcinoma (OSCC) develops along a multistep genetic pathway including loss of tumor suppressor genes and alteration of oncogenes. We characterized seven OSCC cell lines by classical and molecular cytogenetic analysis and fresh tumor and adjacent oral mucosa corresponding to three of the cell lines by molecular cytogenetics. We observed homogeneously staining regions (hsrs) in four of the seven cell lines, at 11q13 in three and at 11q23 and in an unidentified marker chromosome in the fourth. Amplification of band 11q13 occurs in 30-60% of head and neck squamous cell carcinomas. To determine whether INT2 and HST1, both located in band 11q13, are amplified in the tissues and cell lines and to confirm the chromosomal location(s) of the amplification, we used dual-color fluorescence in situ hybridization (FISH) with DNA probes for these genes and the chromosome 11 centromere. We report chromosomal localization of INT2/HST1 amplification in OSCC. Coamplification of INT2 and HST1 was detected in the hsrs in cultured tumor cells from the four hsr-containing tumors and in directly harvested tumor cells, which were available from only two of these tumors. Amplification was not present in tumors lacking hsrs or adjacent oral mucosa corresponding to any of the seven tumors. The observation of amplification in fresh tumor cells suggests that the amplification was present in the patients, may play a key role in the development and/or progression of OSCC, and is not due to karyotypic evolution in vitro. The absence of amplification in the adjacent mucosa suggests that 11q13 amplification is a relatively late event in OSCC tumorigenesis. FAU - Lese, C M AU - Lese CM AD - Department of Human Genetics, University of Pittsburgh, Pennsylvania, USA. FAU - Rossie, K M AU - Rossie KM FAU - Appel, B N AU - Appel BN FAU - Reddy, J K AU - Reddy JK FAU - Johnson, J T AU - Johnson JT FAU - Myers, E N AU - Myers EN FAU - Gollin, S M AU - Gollin SM LA - eng GR - DE10513/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Genes Chromosomes Cancer JT - Genes, chromosomes & cancer JID - 9007329 RN - 0 (FGF3 protein, human) RN - 0 (FGF4 protein, human) RN - 0 (Fibroblast Growth Factor 3) RN - 0 (Fibroblast Growth Factor 4) RN - 0 (Proto-Oncogene Proteins) RN - 62031-54-3 (Fibroblast Growth Factors) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) SB - IM GS - HST1 GS - INT2 MH - Biopsy MH - Carcinoma, Squamous Cell/*genetics/pathology MH - Cell Line MH - Chromosome Aberrations MH - Chromosome Mapping MH - *Chromosomes, Human, Pair 11 MH - Fibroblast Growth Factor 3 MH - Fibroblast Growth Factor 4 MH - Fibroblast Growth Factors/biosynthesis/*genetics MH - Gene Amplification MH - Head and Neck Neoplasms/genetics MH - Humans MH - Karyotyping MH - Mouth Mucosa/pathology MH - Mouth Neoplasms/*genetics/pathology MH - Protein-Tyrosine Kinases/genetics MH - Proto-Oncogene Proteins/biosynthesis/*genetics EDAT- 1995/04/01 00:00 MHDA- 1995/04/01 00:01 CRDT- 1995/04/01 00:00 PHST- 1995/04/01 00:00 [pubmed] PHST- 1995/04/01 00:01 [medline] PHST- 1995/04/01 00:00 [entrez] AID - 10.1002/gcc.2870120409 [doi] PST - ppublish SO - Genes Chromosomes Cancer. 1995 Apr;12(4):288-95. doi: 10.1002/gcc.2870120409.