PMID- 9545096 OWN - NLM STAT- MEDLINE DCOM- 19980521 LR - 20071114 IS - 0148-7299 (Print) IS - 0148-7299 (Linking) VI - 76 IP - 4 DP - 1998 Apr 1 TI - A multicenter investigation with interphase fluorescence in situ hybridization using X- and Y-chromosome probes. PG - 318-26 AB - Twenty-six laboratories used X and Y chromosome probes and the same procedures to process and examine 15,600 metaphases and 49,400 interphases from Phaseolus vulgaris-leucoagglutinin (PHA)-stimulated lymphocytes. In Part I, each laboratory scored 50 metaphases and 200 interphases from a normal male and a normal female from its own practice. In Part II, each laboratory scored 50 metaphases and 200 interphases on slides prepared by a central laboratory from a normal male and a normal female and three mixtures of cells from the male and female. In Part III, each laboratory scored 50 metaphases (in samples of 5, 10, 15, and 20) and 100 interphases (in samples of 5, 10, 15, 20, and 50) on new, coded slides of the same specimens used in Part II. Metaphases from male specimens were scored as 98-99% XY with no XX cells, and 97-98% of interphases were scored as XY with 0.04% XX cells. Metaphases from female specimens were scored as 96-97% XX with 0.03% XY cells, and 94-96% of interphases were scored as XX with 0.05% XY cells. Considering the data as a model for any probe used with fluorescence in situ hybridization (FISH), a statistical approach assessing the impact of analytical sensitivity on the numbers of observations required to assay for potential mosaicisms and chimerisms is discussed. The workload associated with processing slides and scoring 50 metaphases and 200 interphases using FISH averaged 27.1 and 28.6 minutes, respectively. This study indicates that multiple laboratories can test/develop guidelines for the rapid, efficacious, and cost-effective integration of FISH into clinical service. FAU - Dewald, G AU - Dewald G AD - Mayo Clinic, Rochester, Minnesota 55905, USA. FAU - Stallard, R AU - Stallard R FAU - Al Saadi, A AU - Al Saadi A FAU - Arnold, S AU - Arnold S FAU - Bader, P I AU - Bader PI FAU - Blough, R AU - Blough R FAU - Chen, K AU - Chen K FAU - Elejalde, B R AU - Elejalde BR FAU - Harris, C J AU - Harris CJ FAU - Higgins, R R AU - Higgins RR FAU - Hoeltge, G A AU - Hoeltge GA FAU - Hsu, W T AU - Hsu WT FAU - Kubic, V AU - Kubic V FAU - McCorquodale, D J AU - McCorquodale DJ FAU - Micale, M A AU - Micale MA FAU - Moore, J W AU - Moore JW FAU - Phillips, R M AU - Phillips RM FAU - Scheib-Wixted, S AU - Scheib-Wixted S FAU - Schwartz, S AU - Schwartz S FAU - Siembieda, S AU - Siembieda S FAU - Strole, K AU - Strole K FAU - VanTuinen, P AU - VanTuinen P FAU - Vance, G H AU - Vance GH FAU - Wiktor, A AU - Wiktor A FAU - Zinsmeister, A AU - Zinsmeister A AU - et al. LA - eng GR - MCJ-551004-04/PHS HHS/United States PT - Journal Article PT - Multicenter Study PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Med Genet JT - American journal of medical genetics JID - 7708900 RN - 0 (DNA Probes) RN - 0 (Phytohemagglutinins) SB - IM MH - Cytogenetics/standards MH - *DNA Probes MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence/instrumentation/*methods MH - *Interphase MH - Laboratories/standards MH - Lymphocyte Activation MH - Lymphocytes/cytology MH - Male MH - Metaphase MH - Phytohemagglutinins MH - Quality Control MH - Reproducibility of Results MH - Sensitivity and Specificity MH - Workload MH - *X Chromosome MH - *Y Chromosome EDAT- 1998/04/17 02:03 MHDA- 2000/06/20 09:00 CRDT- 1998/04/17 02:03 PHST- 1998/04/17 02:03 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1998/04/17 02:03 [entrez] AID - 10.1002/(SICI)1096-8628(19980401)76:4<318::AID-AJMG7>3.0.CO;2-L [pii] PST - ppublish SO - Am J Med Genet. 1998 Apr 1;76(4):318-26.