PMID- 9772905 OWN - NLM STAT- MEDLINE DCOM- 19981023 LR - 20190816 IS - 0165-4608 (Print) IS - 0165-4608 (Linking) VI - 106 IP - 1 DP - 1998 Oct 1 TI - Characterization of multiple 12p rearrangements in testicular germ cell tumor cell line 833K and its subclone 64CP by chromosome microdissection. PG - 24-9 AB - Rearrangements of chromosome arm 12p are known to be common in germ cell tumors (GCT). Previous studies, using fluorescence in situ hybridization (FISH) with a whole chromosome 12 painting probe, showed unusual distributions of chromosome 12-derived chromatin in GCT cell line 833K and its cisplatin-resistant subclone, 64CP, located next to AgNOR (silver staining nucleolus organizer regions), some of which were ectopic. In this study, the ectopic stalk regions were shown by FISH to be composed of 18s and 28s rDNA, but were flanked by beta-satellite DNA, which may form a barrier around the rDNA. In order to determine the specific origins of the rearranged chromosome 12 segments, three different derived chromosome 12 regions were isolated from 64CP, using chromosomal microdissection. The microdissected fragments were labeled and hybridized by FISH to normal human chromosomes. All three segments localized to distal 12p; 12p12-->12pter, but with apparently different breakpoints for each segment. Furthermore, three-color FISH experiments with 12p band-specific probes demonstrated that the derivative chromosome 12 regions in 833K also originate from distal 12p (12p12-->p13). These sequences now can be evaluated for degree of overlap or common breakpoints which may be of significance in the development or progression of GCT. FAU - Blough, R I AU - Blough RI AD - Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, USA. FAU - Vance, G H AU - Vance GH FAU - Henegariu, O AU - Henegariu O FAU - Smolarek, T A AU - Smolarek TA FAU - Sledge, G W Jr AU - Sledge GW Jr FAU - Heerema, N A AU - Heerema NA LA - eng PT - Journal Article PL - United States TA - Cancer Genet Cytogenet JT - Cancer genetics and cytogenetics JID - 7909240 SB - IM MH - *Chromosome Aberrations MH - *Chromosomes, Human, Pair 12 MH - Germinoma/*genetics MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Testicular Neoplasms/*genetics MH - Tumor Cells, Cultured EDAT- 1998/10/17 02:11 MHDA- 2001/03/28 10:01 CRDT- 1998/10/17 02:11 PHST- 1998/10/17 02:11 [pubmed] PHST- 2001/03/28 10:01 [medline] PHST- 1998/10/17 02:11 [entrez] AID - S0165460898000429 [pii] AID - 10.1016/s0165-4608(98)00042-9 [doi] PST - ppublish SO - Cancer Genet Cytogenet. 1998 Oct 1;106(1):24-9. doi: 10.1016/s0165-4608(98)00042-9.