Artículos de revistas
Molecular Effects Of The Phosphatidylinositol-3-kinase Inhibitor Nvp-bkm120 On T And B-cell Acute Lymphoblastic Leukaemia
Registro en:
Molecular Effects Of The Phosphatidylinositol-3-kinase Inhibitor Nvp-bkm120 On T And B-cell Acute Lymphoblastic Leukaemia. Elsevier Sci Ltd, v. 51, p. 2076-2085 SEP-2015.
0959-8049
WOS:000360081300025
10.1016/j.ejca.2015.07.018
Autor
Novais Pereira
Joao Kleber; Machado-Neto
Joao Agostinho; Lopes
Matheus Rodrigues; Morini
Beatriz Corey; Traina
Fabiola; Costa
Fernando Ferreira; Olalla Saad
Sara Teresinha; Favaro
Patricia
Institución
Resumen
Background: Constitutive activation of the PI3K pathway in T cell acute lymphoblastic leukaemia (T-ALL) has been reported and in a mouse model, PI3K activation, together with MYC, cooperates in Burkitt lymphoma (BL) pathogenesis. We investigated the effects of NVP-BKM120, a potent pan-class I PI3K inhibitor, in lymphoblastic leukaemia cell lines. Methods: Effects of NVP-BKM120 on cell viability, clonogenicity, apoptosis, cell cycle, cell signalling and autophagy were assessed in vitro on T-ALL (Jurkat and MOLT-4) and BL (Daudi and NAMALWA) cell lines. Results: NVP-BKM120 treatment decreased cell viability and clonogenic growth in all tested cells. Moreover, the drug arrested cell cycling in association with a decrease in Cyclin B1 protein levels, and increased apoptosis. Immunoblotting analysis of cells treated with the drug revealed decreased phosphorylation, in a dose-dependent manner, of AKT, mTOR, P70S6K and 4EBP1, with stable total protein levels. Additionally, we observed a dose-dependent decrease in BAD phosphorylation, in association with augmented BAX: BCL2 ratio. Quantification of autophagy showed a dose-dependent increase in acidic vesicular organelles in all cells tested. Conclusion: In summary, our present study establishes that NVP-BKM120 presents an effective antitumour activity against T-ALL and BL cell lines. (C) 2015 Elsevier Ltd. All rights reserved. 51 14
2076 2085