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Title: Non-radioactive in situ hybridization for the detection and monitoring of trisomy 12 in B-cell chronic lymphocytic leukaemia
Authors: Cuneo, A ×
Wlodarska, Iwona
Sayed Aly, M
Piva, N
Carli, M G
Fagioli, F
Tallarico, A
Pazzi, I
Ferrari, L
Cassiman, Jean-Jacques #
Issue Date: Sep-1992
Series Title: British Journal of Haematology vol:81 issue:2 pages:192-6
Abstract: Non-radioactive in situ hybridization (NISH) with a chromosome 12-specific alpha satellite probe was performed on 20 patients with chronic lymphocytic leukaemia (CLL) with normal karyotype (15 cases) or with inadequate mitotic yield (5 cases) from mitogen-stimulated cultures. All patients had over 70% lymphocytes coexpressing the CD5/CD23 antigens. While less than 1% interphase nuclei showed three fluorescent spots in 16/20 patients, evidence of trisomy 12 in 15-25% interphase cells was detected in four patients. According to the FAB classification the diagnosis in these patients was typical B-CLL, stage III (Rai's staging system) in one case, CLL/PLL, stage II and III in two cases, PLL, stage III in one case. In order to confirm these results, NISH was repeated after 1 month in one patient and after 2 years in three patients. All patients had been treated with chemotherapy in the period between the two NISH experiments. In all cases a 1.8-3-fold increase of percentage of trisomic interphase cells was detected. These findings suggest that in B-CLL clones with trisomy 12 may have proliferative advantage over clonal B-lymphocyte without +12 and, possibly, that they may be more resistant to chemotherapy. We conclude that NISH is a sensitive technique allowing for the detection and monitoring of trisomy 12 in a fraction of B-CLL patients with normal karyotype or with no analysable mitoses despite employment of polyclonal B-cell mitogens.
ISSN: 0007-1048
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Clinical Genetics Section (-)
Human Mutations and Polymorphisms Section (-)
Forensic Biomedical Sciences
Laboratory for Genetics of Malignant Disorders
× corresponding author
# (joint) last author

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