PMID- 17488685 OWN - NLM STAT- MEDLINE DCOM- 20070716 LR - 20231213 IS - 1592-8721 (Electronic) IS - 0390-6078 (Linking) VI - 92 IP - 5 DP - 2007 May TI - Characterization of ABL1 expression in adult T-cell acute lymphoblastic leukemia by oligonucleotide array analysis. PG - 619-26 AB - BACKGROUND AND OBJECTIVES: Recent data have highlighted an involvement of ABL1 in T-cell acute lymphoblastic leukemia (T-ALL). Specifically, the presence of a fusion gene involving ABL1 and NUP214, both located at 9q34, has been reported. We sought to evaluate whether T-ALL patients with overexpression of ABL showed a peculiar gene expression pattern and were characterized by having specific rearrangements. DESIGN AND METHODS: We previously assessed the expression profile of 128 adults with ALL by oligonucleotide arrays: 33 had T-ALL. In the current study, we evaluated the expression levels of ABL1 in T-ALL cases and found three patients who had ABL1 levels comparable to those detected in BCR/ABL (+)cases and one who had a significantly higher level of ABL1 expression. In order to establish the incidence of ABL1 overexpression in T-ALL, we evaluated 17 additional patients by quantitative (Q)-polymerase chain reaction (PCR) and reverse transcription (RT)-PCR. RESULTS: The three cases with ABL1 expression levels comparable to those found in BCR/ABL (+)cases had a specific signature characterized by a high expression of genes involved in regulation of transcription. The fourth case, with the highest levels of ABL, harbored the NUP214-ABL1 rearrangement, which was confirmed by fluorescence in situ hybridization (FISH). Three of the four patients were refractory to induction chemotherapy. Of the 17 additional patients evaluated by Q-PCR and RT-PCR, none showed ABL1 overexpression. INTERPRETATION AND CONCLUSIONS: Overall, overexpression of ABL1 was found in 8% of T-ALL cases. These results underline the value of microarray analyses for the identification of specific signatures associated with ABL1 overexpression, as well as rearrangements, e.g. NUP214-ABL1, in adult T-ALL. FAU - Chiaretti, Sabina AU - Chiaretti S AD - Division of Hematology, Department of Cellular Biotechnologies and Hematology, University La Sapienza, Rome, Italy. FAU - Tavolaro, Simona AU - Tavolaro S FAU - Ghia, Emanuela Maria AU - Ghia EM FAU - Ariola, Cristina AU - Ariola C FAU - Matteucci, Caterina AU - Matteucci C FAU - Elia, Loredana AU - Elia L FAU - Maggio, Roberta AU - Maggio R FAU - Messina, Monica AU - Messina M FAU - Ricciardi, Maria Rosaria AU - Ricciardi MR FAU - Vitale, Antonella AU - Vitale A FAU - Ritz, Jerome AU - Ritz J FAU - Mecucci, Cristina AU - Mecucci C FAU - Guarini, Anna AU - Guarini A FAU - Foa, Robin AU - Foa R LA - eng PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Italy TA - Haematologica JT - Haematologica JID - 0417435 RN - 0 (Chromosomal Proteins, Non-Histone) RN - 0 (DEK protein, human) RN - 0 (EML1-ABL1 fusion protein, human) RN - 0 (Homeodomain Proteins) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (NUP214-ABL1 fusion protein, human) RN - 0 (Neoplasm Proteins) RN - 0 (Oncogene Proteins) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (Poly-ADP-Ribose Binding Proteins) RN - 0 (Proto-Oncogene Proteins) RN - 0 (RNA, Messenger) RN - 0 (RNA, Neoplasm) RN - 0 (STIL protein, human) RN - 0 (TLX3 protein, human) RN - 143275-75-6 (TLX1 protein, human) RN - EC 2.7.10.2 (Fusion Proteins, bcr-abl) RN - EC 2.7.10.2 (Proto-Oncogene Proteins c-abl) SB - IM MH - Adolescent MH - Adult MH - Chromosomal Proteins, Non-Histone/biosynthesis/genetics MH - Clinical Trials as Topic/statistics & numerical data MH - Female MH - Fusion Proteins, bcr-abl/biosynthesis/genetics MH - *Gene Expression Profiling MH - *Gene Expression Regulation, Leukemic MH - *Genes, abl MH - Homeodomain Proteins/biosynthesis/genetics MH - Humans MH - In Situ Hybridization, Fluorescence MH - Intracellular Signaling Peptides and Proteins/genetics MH - Leukemia-Lymphoma, Adult T-Cell/blood/*genetics MH - Male MH - Multicenter Studies as Topic/statistics & numerical data MH - Neoplasm Proteins/*biosynthesis/genetics MH - Nucleic Acid Hybridization MH - Oligonucleotide Array Sequence Analysis MH - Oncogene Proteins/biosynthesis/genetics MH - Oncogene Proteins, Fusion/*biosynthesis/genetics MH - Poly-ADP-Ribose Binding Proteins MH - Polymerase Chain Reaction MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics/metabolism MH - Proto-Oncogene Proteins/biosynthesis/genetics MH - Proto-Oncogene Proteins c-abl/*biosynthesis MH - RNA, Messenger/biosynthesis/genetics MH - RNA, Neoplasm/biosynthesis/genetics EDAT- 2007/05/10 09:00 MHDA- 2007/07/17 09:00 CRDT- 2007/05/10 09:00 PHST- 2007/05/10 09:00 [pubmed] PHST- 2007/07/17 09:00 [medline] PHST- 2007/05/10 09:00 [entrez] AID - 10.3324/haematol.10865 [doi] PST - ppublish SO - Haematologica. 2007 May;92(5):619-26. doi: 10.3324/haematol.10865.