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Analysis of the chronic lymphocytic leukemia coding genome: role of NOTCH1 mutational activation

Open access
Fabbri, Giulia, Rasi, Silvia, Rossi, Davide, Trifonov, Vladimir, Khiabanian, Hossein, Ma, Jing, Grunn, Adina, Fangazio, Marco, Capello, Daniela, Monti, Sara, Cresta, Stefania, Gargiulo, Ernesto, Forconi, Francesco, Guarini, Anna, Arcaini, Luca, Paulli, Marco, Laurenti, Luca, Larocca, Luigi M., Marasca, Roberto, Gattei, Valter, Oscier, David, Bertoni, Francesco, Mullighan, Charles G., Foá, Robin, Pasqualucci, Laura, Rabadan, Raul, Dalla-Favera, Riccardo, Gaidano, Gianluca·2011·Journal of Experimental Medicine

Abstract

The pathogenesis of chronic lymphocytic leukemia (CLL), the most common leukemia in adults, is still largely unknown. The full spectrum of genetic lesions that are present in the CLL genome, and therefore the number and identity of dysregulated cellular pathways, have not been identified. By combining next-generation sequencing and copy number analysis, we show here that the typical CLL coding genome contains <20 clonally represented gene alterations/case, including predominantly nonsilent mutations, and fewer copy number aberrations. These analyses led to the discovery of several genes not previously known to be altered in CLL. Although most of these genes were affected at low frequency in an expanded CLL screening cohort, mutational activation of NOTCH1, observed in 8.3% of CLL at diagnosis, was detected at significantly higher frequency during disease progression toward Richter transformation (31.0%), as well as in chemorefractory CLL (20.8%). Consistent with the association of NOTCH1 mutations with clinically aggressive forms of the disease, NOTCH1 activation at CLL diagnosis emerged as an independent predictor of poor survival. These results provide initial data on the complexity of the CLL coding genome and identify a dysregulated pathway of diagnostic and therapeutic relevance.

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Metadata

Authors
Fabbri, G., Rasi, S., Rossi, D., Trifonov, V., Khiabanian, H., Ma, J., Grunn, A., Fangazio, M., Capello, D., Monti, S., Cresta, S., Gargiulo, E., Forconi, F., Guarini, A., Arcaini, L., Paulli, M., Laurenti, L., Larocca, L. M., Marasca, R., Gattei, V., Oscier, D., Bertoni, F., Mullighan, C. G., Foá, R., Pasqualucci, L., Rabadan, R., Dalla-Favera, R., & Gaidano, G.
Venue
Journal of Experimental Medicine
Published
2011-06-13
Volume
208
Issue
7
Pages
1389-1401
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2116431837
Cited by
610
References
8
FWCI
36.10
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Analysis of the chronic lymphocytic leukemia coding genome: role of NOTCH1 mutational activation. https://app.cochat.ai/papers/10.1084/jem.20110921
The paper
Fabbri, G., Rasi, S., Rossi, D., Trifonov, V., Khiabanian, H., Ma, J., Grunn, A., Fangazio, M., Capello, D., Monti, S., Cresta, S., Gargiulo, E., Forconi, F., Guarini, A., Arcaini, L., Paulli, M., Laurenti, L., Larocca, L. M., Marasca, R., . . . Gaidano, G. (2011). Analysis of the chronic lymphocytic leukemia coding genome: role of NOTCH1 mutational activation. Journal of Experimental Medicine. https://doi.org/10.1084/jem.20110921

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.