Isolation of differentially expressed genes in NPM-ALK-positive anaplastic large cell lymphoma.
In this study, we used subtractive suppression hybridization to compare gene expression between an ALK-positive anaplastic large cell lymphoma (ALCL)-derived cell line and a clinical case of ALK-negative ALCL. Construction and screening of a subtracted library resulted in the cloning of 29 cDNAs which were differentially expressed. Most of these clones corresponded to novel genes with unknown function (EST) or to genes implicated in the differentiation, activation or signalling of T cells such as Ran/TC4, interleukin 1-receptor, thymosin beta4, thymosin beta10, moesin and cytohesin-1. Other genes involved in the regulation of apoptosis, such as human inhibitor of apoptosis-1 (HIAP-1), Bax inhibitor-1 and MCL-1, or DNA repair, such as poly (ADP-ribose) polymerase 1 (PARP-1), X-associated protein-1 (XAP-1), SUMO-1 (sentrin-1) and RanGTPase-activating protein 1 (RanGAP-1), were isolated. Interestingly, we found that both RNA and protein levels of human sterol isomerase (hSI), also referred to as emopamil binding protein (EBP), were overexpressed in ALK+ tumours. This protein is involved in the biosynthesis of cholesterol and may be activated by NPM-ALK. Overall, our results suggest that all the genes described above are upregulated in the NPM-ALK-driven transformation process, and that moesin and cytohesin-1 may be more specifically implicated in a signalling pathway involving PLCgamma and PI3K.
Laboratoire d'Anatomie Pathologique, CNRS-UPR 2163, CHU Purpan Toulouse, France.
Claire
C
Villalva
Pascal
P
Trempat
Catherine
C
Greenland
Charles
C
Thomas
Jean Philippe
JP
Girard
Fabian
F
Moebius
Georges
G
Delsol
Pierre
P
Brousset
D000077548:Anaplastic Lymphoma Kinase; D017209:Apoptosis / Q000235:genetics; D015152:Blotting, Northern; D015153:Blotting, Western; D002352:Carrier Proteins / Q000235:genetics; D002648:Child; D002889:Chromosomes, Human, Pair 2 / Q000235:genetics; D002895:Chromosomes, Human, Pair 5 / Q000235:genetics; D004260:DNA Repair / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics; D004273:DNA, Neoplasm / Q000235:genetics; D015870:Gene Expression; D015723:Gene Library; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics*; D008297:Male; D009363:Neoplasm Proteins / Q000235:genetics*; D009687:Nuclear Proteins / Q000235:genetics*; D000090243:Nucleophosmin; D011505:Protein-Tyrosine Kinases / Q000235:genetics*; D020794:Receptor Protein-Tyrosine Kinases; D013251:Steroid Isomerases; D014178:Translocation, Genetic; D014407:Tumor Cells, Cultured
D002352:Carrier Proteins; D018076:DNA, Complementary; D004273:DNA, Neoplasm; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D000090243:Nucleophosmin; C000626173:ALK protein, human; D000077548:Anaplastic Lymphoma Kinase; D011505:Protein-Tyrosine Kinases; D020794:Receptor Protein-Tyrosine Kinases; D013251:Steroid Isomerases; C090445:EBP protein, human