PMID- 8685681 OWN - NLM STAT- MEDLINE DCOM- 19960822 LR - 20131121 IS - 0036-7672 (Print) IS - 0036-7672 (Linking) VI - 126 IP - 20 DP - 1996 May 18 TI - [Fluorescent in-situ hybridization technique (FISH) in the diagnosis of Philadelphia translocation in chronic myeloid leukemia]. PG - 855-63 AB - The Philadelphia chromosome (Ph) resulting from translocation t(9;22)(q34;q11) is observed in more than 90% of patients with chronic myeloid leukemia (CML). Its molecular consequence is the genesis of a fusion gene BCR-ABL between the 5' sequences of the BCR gene (chromosome 22) and the 3' end of the ABL gene (chromosome 9). Fluorescence in situ hybridization (FISH) using specific DNA probes provides a useful tool for the detection of t(9;22) and BCR-ABL rearrangement. We report our results using the FISH technique for t(9;22) assessment in the hematopoietic cells of patients with Ph-positive CML. The DNA libraries pBS 9 and pBS 22 containing multiple sequences derived from chromosomes 9 and 22 have been used to identify t(9;22) in metaphase cells. The cos bcr-51 and cos abl-18 probes that hybridize to unique sequences specific to the BCR and ABL genes have the ability to detect the BCR-ABL rearrangement in metaphase cells as well as in interphase nuclei. FISH is a sensitive and specific technique that represents a valuable complement to conventional cytogenetics. The BCR-ABL rearrangement can be detected in metaphase spreads of insufficient quality or from interphase nuclei in the case of terminally differentiated cells or of cells which do not divide in vitro. When the efficiency of hybridization and detection is good, a large number of cells can be analyzed. This is of major significance in assessment of response to treatment and definition of a cytogenetic remission. However, interphase cytogenetics may be difficult due to variations in signal resolution and background level. The FISH technique can also be used to detect the BCR-ABL rearrangement in cases of Ph negative BCR-ABL positive CML. FAU - Martinet, D AU - Martinet D AD - Division autonome de genetique medicale, Centre hospitalier universitaire vaudois (CHUV), Lausanne. FAU - Muhlematter, D AU - Muhlematter D FAU - Jotterand Bellomo, M AU - Jotterand Bellomo M LA - fre PT - English Abstract PT - Journal Article PT - Review TT - Application de la technique d'hybridation in situ fluorescente (FISH) au diagnostic de la translocation de Philadelphie dans la leucemie myeloide chronique. PL - Switzerland TA - Schweiz Med Wochenschr JT - Schweizerische medizinische Wochenschrift JID - 0404401 RN - 0 (DNA Probes) RN - EC 2.7.10.2 (Fusion Proteins, bcr-abl) SB - IM MH - Color MH - DNA Probes MH - Fusion Proteins, bcr-abl/isolation & purification MH - Humans MH - In Situ Hybridization, Fluorescence/*methods MH - Leukemia, Myelogenous, Chronic, BCR-ABL Positive/*genetics MH - *Philadelphia Chromosome MH - *Translocation, Genetic RF - 30 EDAT- 1996/05/18 00:00 MHDA- 1996/05/18 00:01 CRDT- 1996/05/18 00:00 PHST- 1996/05/18 00:00 [pubmed] PHST- 1996/05/18 00:01 [medline] PHST- 1996/05/18 00:00 [entrez] PST - ppublish SO - Schweiz Med Wochenschr. 1996 May 18;126(20):855-63.