PMID- 7790992 OWN - NLM STAT- MEDLINE DCOM- 19950727 LR - 20061115 IS - 0022-3417 (Print) IS - 0022-3417 (Linking) VI - 175 IP - 4 DP - 1995 Apr TI - Interphase cytogenetic analysis of distinct X-chromosomal translocation breakpoints in synovial sarcoma. PG - 391-6 AB - Synovial sarcomas show a specific translocation involving chromosomes X and 18, t(X;18)(p11.2;q11.2). Two distinct X-chromosomal breakpoints occur in different synovial sarcoma tumour samples. These breakpoints are located within two related genomic regions containing ornithine aminotransferase-like sequences, termed OATL1 and OATL2. Preliminary observations indicated the potential correlation of OATL1-associated breakpoints with biphasic tumours and OATL2-associated breakpoints with monophasic fibrous tumours. The present study uses interphase cytogenetics to investigate the nature of chromosomal aberrations in frozen synovial sarcoma tissue samples. Two-colour fluorescence in situ hybridization (FISH) was performed using probes specific for the centromeres of chromosome X or 18, along with yeast artificial chromosome probes corresponding to the distinct breakpoint regions on Xp. One monophasic epithelial and two monophasic fibrous synovial sarcomas showed an OATL2-associated breakpoint, while a biphasic tumour revealed a hybridization pattern indicating a breakpoint within the OATL1 region. These results confirm our previous suggestion of a relationship between alternative breakpoints in Xp11.2 and different histological phenotypes observed in synovial sarcomas. They also demonstrate the utility of the two-colour hybridization approach for the identification of chromosomal changes in interphase nuclei isolated from frozen tissues. FAU - Janz, M AU - Janz M AD - Institute for Molecular Biology, Hannover Medical School, Germany. FAU - De Leeuw, B AU - De Leeuw B FAU - Weghuis, D O AU - Weghuis DO FAU - Werner, M AU - Werner M FAU - Nolte, M AU - Nolte M FAU - Geurts Van Kessel, A AU - Geurts Van Kessel A FAU - Nordheim, A AU - Nordheim A FAU - Hipskind, R A AU - Hipskind RA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Pathol JT - The Journal of pathology JID - 0204634 SB - IM MH - *Chromosomes, Human, Pair 18 MH - Humans MH - Immunoenzyme Techniques MH - Immunophenotyping MH - In Situ Hybridization, Fluorescence MH - *Interphase MH - Sarcoma, Synovial/*genetics/metabolism MH - *Translocation, Genetic MH - *X Chromosome 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/path.1711750405 [doi] PST - ppublish SO - J Pathol. 1995 Apr;175(4):391-6. doi: 10.1002/path.1711750405.