PMID- 9067426 OWN - NLM STAT- MEDLINE DCOM- 19970417 LR - 20180214 IS - 0301-0171 (Print) IS - 0301-0171 (Linking) VI - 75 IP - 4 DP - 1996 TI - Isolation of cosmids corresponding to the chromosome breakpoints of a de novo autosomal translocation, t(6;19)(p21;q13.1), in a patient with multicystic renal dysplasia. PG - 210-5 AB - Hydronephrosis caused by pelvi-ureteric junction obstruction (PUJO) is a frequent urological malformation assumed to result from a deficient development of the ureteric bud. The exact etiology of pelvi-ureteric junction stenosis is unknown, but there is convincing evidence for a genetic cause, with linkage analysis predicting a hereditary hydronephrosis locus on chromosome 6p. We encountered a patient with a de novo autosomal t(6;19)(p21;q13.1) and attendant bilateral multicystic renal dysplasia (MRD), bilateral PUJO resulting in massive hydronephrosis, and an associated von Mayer-Rokitansky-Kuster disorder. On the basis of the presumption that in this patient the putative hydronephrosis gene might be disrupted by the translocation, we sought to isolate DNA from the breakpoint regions as the initial step in a strategy to identify genes affected by the t(6; 19). Using sequential rounds of fluorescence in situ hybridization (FISH) with cosmids selected from a detailed integrated map of the long arm of chromosome 19, we have identified a cosmid clone that spans the breakpoint. The position of the breakpoint was further localized by Southern blot analysis. Using a vectorette PCR approach, rearranged DNA fragments were isolated and, by comparative nucleotide sequence analysis, these were shown to contain ectopic sequences. A cosmid clone containing these ectopic sequences was isolated and shown by CASH (chromosome assignment using somatic cell hybrids) and FISH (fluorescence in situ hybridization) analysis to map to the short arm of chromosome 6 and to span the breakpoint found in the MRD patient. The isolated cosmid clones are useful reagents for analysis of other MRD patients and for the search for genes at or flanking the breakpoints. FAU - Groenen, P M AU - Groenen PM AD - Laboratory for Molecular Oncology, Center for Human Genetics, University of Leuven(Belgium). FAU - Garcia, E AU - Garcia E FAU - Thoelen, R AU - Thoelen R FAU - Aly, M AU - Aly M FAU - Schoenmakers, E F AU - Schoenmakers EF FAU - Devriendt, K AU - Devriendt K FAU - Fryns, J P AU - Fryns JP FAU - Van de Ven, W J AU - Van de Ven WJ LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Switzerland TA - Cytogenet Cell Genet JT - Cytogenetics and cell genetics JID - 0367735 RN - 9007-49-2 (DNA) SB - IM MH - Adult MH - Chromosome Aberrations/embryology/*genetics MH - Chromosome Disorders MH - Chromosomes, Human, Pair 19/*ultrastructure MH - Chromosomes, Human, Pair 6/genetics/*ultrastructure MH - Cosmids/*genetics MH - DNA/genetics MH - Female MH - Fetal Diseases/*genetics MH - Fibroblasts/pathology MH - Humans MH - Hydronephrosis/embryology/*genetics MH - In Situ Hybridization, Fluorescence MH - Kidney Pelvis/*abnormalities/embryology MH - Lung/pathology MH - Oligohydramnios/etiology MH - Polycystic Kidney Diseases/embryology/*genetics MH - Polymerase Chain Reaction MH - Pregnancy MH - Translocation, Genetic/*genetics MH - Ureter/*abnormalities/embryology MH - Ureteral Obstruction/embryology/etiology EDAT- 1996/01/01 00:00 MHDA- 1996/01/01 00:01 CRDT- 1996/01/01 00:00 PHST- 1996/01/01 00:00 [pubmed] PHST- 1996/01/01 00:01 [medline] PHST- 1996/01/01 00:00 [entrez] AID - 10.1159/000134485 [doi] PST - ppublish SO - Cytogenet Cell Genet. 1996;75(4):210-5. doi: 10.1159/000134485.