Triple Akt inhibition as a new therapeutic strategy in T-cell acute lymphoblastic leukemia
Cani, Alice; Simioni, Carolina; Martelli, Alberto M.; Zauli, Giorgio; Tabellini, Giovanna; Ultimo, Simona; McCubrey, James A.; Capitani, Silvano; Neri, Luca M.
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive neoplastic disorder in which chemotherapy resistance and refractory relapses occur, with a poorer prognostic outcome. Constitutively active PI3K/Akt/mTOR pathway is a common feature of T-ALL upregulating cell proliferation, survival and drug resistance. This pathway is currently under clinical trials with small molecules inhibitors (SMI). To verify whether a multi-inhibition treatment against Akt protein could enhance the efficacy of individual drug administration and overcome drug resistance as well as to obtain a decrease in single drug concentration, we tested on T-ALL cell lines the effects of combined treatments with three Akt inhibitors with different mode of action, GSK690693, MK-2206 and Perifosine. In cells with hyperactivated Akt, combined administration of the drugs displayed a significant synergistic and cytotoxic effect and affected PI3K/Akt/mTOR pathway at much lower concentration than single drug use. Highest synergistic effect for full inhibition of Akt was also related to the timing of every drug administration. Furthermore the triple treatment had greater efficacy in inducing cell cycle arrest in G0/G1 phase and both apoptosis and autophagy. Targeting Akt as a key protein of PI3K/Akt/mTOR pathway with multiple drugs might represent a new and promising pharmacological strategy for treatment of T-ALL patients.
Cani, Alice, & Simioni, Carolina, & Martelli, Alberto M., & Zauli, Giorgio, & Tabellini, Giovanna, & Ultimo, Simona, & McCubrey, James A., & Capitani, Silvano, & Neri, Luca M.. (March 2015). Triple Akt inhibition as a new therapeutic strategy in T-cell acute lymphoblastic leukemia. Oncotarget, 6(9), 6597- 6610. Retrieved from http://hdl.handle.net/10342/5593
Cani, Alice, and Simioni, Carolina, and Martelli, Alberto M., and Zauli, Giorgio, and Tabellini, Giovanna, and Ultimo, Simona, and McCubrey, James A., and Capitani, Silvano, and Neri, Luca M.. "Triple Akt inhibition as a new therapeutic strategy in T-cell acute lymphoblastic leukemia". Oncotarget. 6:9. (6597-6610), March 2015. August 21, 2018. http://hdl.handle.net/10342/5593.
Cani, Alice and Simioni, Carolina and Martelli, Alberto M. and Zauli, Giorgio and Tabellini, Giovanna and Ultimo, Simona and McCubrey, James A. and Capitani, Silvano and Neri, Luca M., "Triple Akt inhibition as a new therapeutic strategy in T-cell acute lymphoblastic leukemia," Oncotarget 6, no. 9 (March 2015), http://hdl.handle.net/10342/5593 (accessed August 21, 2018).
Cani, Alice, Simioni, Carolina, Martelli, Alberto M., Zauli, Giorgio, Tabellini, Giovanna, Ultimo, Simona, McCubrey, James A., Capitani, Silvano, Neri, Luca M.. Triple Akt inhibition as a new therapeutic strategy in T-cell acute lymphoblastic leukemia. Oncotarget. March 2015; 6(9): 6597-6610. http://hdl.handle.net/10342/5593. Accessed August 21, 2018.