RT Journal Article
SR Electronic
T1 Synergistic suppression of the PI3K inhibitor CAL-101 with bortezomib on mantle cell lymphoma growth
JF Cancer Biology and Medicine
JO Cancer Biol Med
FD China Anti-Cancer Association
SP 401
OP 408
DO 10.7497/j.issn.2095-3941.2015.0013
VO 12
IS 4
A1 Qu, Beatri
A1 Xia, Bing
A1 Li, Su-Xia
A1 Tian, Chen
A1 Yang, Hong-Liang
A1 Li, Qian
A1 Wang, Ya-Fei
A1 Yu, Yong
A1 Zhang, Yi-Zhuo
YR 2015
UL http://www.cancerbiomed.org/content/12/4/401.abstract
AB Objective: To investigate the effects of CAL-101, particularly when combined with bortezomib (BTZ) on mantle cell lymphoma (MCL) cells, and to explore its relative mechanisms.Methods: MTT assay was applied to detect the inhibitory effects of different concentrations of CAL-101. MCL cells were divided into four groups: control group, CAL-101 group, BTZ group, and CAL-101/BTZ group. The expression of PI3K-p110σ, AKT, ERK, p-AKT and p-ERK were detected by Western blot. The apoptosis rates of CAL-101 group, BTZ group, and combination group were detected by flow cytometry. The location changes of nuclear factor kappa-B (NF-κB) of 4 groups was investigated by NF-κB Kit exploring. Western blot was applied to detect the levels of caspase-3 and the phosphorylation of AKT in different groups.Results: CAL-101 dose- and time-dependently induced reduction in MCL cell viability. CAL-101 combined with BTZ enhanced the reduction in cell viability and apoptosis. Western blot analysis showed that CAL-101 significantly blocked the PI3K/AKT and ERK signaling pathway in MCL cells. The combination therapy contributed to the inactivation of NF-κB and AKT in MCL cell lines. However, cleaved caspase-3 was up-regulated after combined treatment.Conclusion: Our study showed that PI3K/p110σ is a novel therapeutic target in MCL, and the underlying mechanism could be the blocking of the PI3K/AKT and ERK signaling pathways. These findings provided a basis for clinical evaluation of CAL-101 and a rationale for its application in combination therapy, particularly with BTZ.