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Anti‐growth and pro‐apoptotic effects of dasatinib on human oral cancer cells through multi‐targeted mechanisms
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Anti‐growth and pro‐apoptotic effects of dasatinib on human oral cancer cells through multi‐targeted mechanisms
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Journal Article
Anti‐growth and pro‐apoptotic effects of dasatinib on human oral cancer cells through multi‐targeted mechanisms
2021
Overview
Dasatinib is an inhibitor of Src that has anti‐tumour effects on many haematological and solid cancers. However, the anti‐tumour effects of dasatinib on human oral cancers remain unclear. In this study, we investigated the effects of dasatinib on different types of human oral cancer cells: the non‐tumorigenic YD‐8 and YD‐38 and the tumorigenic YD‐10B and HSC‐3 cells. Strikingly, dasatinib at 10 µM strongly suppressed the growth and induced apoptosis of YD‐38 cells and inhibited the phosphorylation of Src, EGFR, STAT‐3, STAT‐5, PKB and ERK‐1/2. In contrast, knockdown of Src blocked the phosphorylation of EGFR, STAT‐5, PKB and ERK‐1/2, but not STAT‐3, in YD‐38 cells. Dasatinib induced activation of the intrinsic caspase pathway, which was inhibited by z‐VAD‐fmk, a pan‐caspase inhibitor. Dasatinib also decreased Mcl‐1 expression and S6 phosphorylation while increased GRP78 expression and eIF‐2α phosphorylation in YD‐38 cells. In addition, to its direct effects on YD‐38 cells, dasatinib also exhibited anti‐angiogenic properties. Dasatinib‐treated YD‐38 or HUVEC showed reduced HIF‐1α expression and stability. Dasatinib alone or conditioned media from dasatinib‐treated YD‐38 cells inhibited HUVEC tube formation on Matrigel without affecting HUVEC viability. Importantly, dasatinib's anti‐growth, anti‐angiogenic and pro‐apoptotic effects were additionally seen in tumorigenic HSC‐3 cells. Together, these results demonstrate that dasatinib has strong anti‐growth, anti‐angiogenic and pro‐apoptotic effects on human oral cancer cells, which are mediated through the regulation of multiple targets, including Src, EGFR, STAT‐3, STAT‐5, PKB, ERK‐1/2, S6, eIF‐2α, GRP78, caspase‐9/3, Mcl‐1 and HIF‐1α.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc
Subject
/ Antineoplastic Agents - pharmacology
/ Biomarkers, Tumor - metabolism
/ Carcinoma, Squamous Cell - drug therapy
/ Caspase
/ Epidermal growth factor receptors
/ HIF‐1α
/ HSC‐3
/ Humans
/ Kinases
/ Leukemia
/ Mouth Neoplasms - drug therapy
/ Original
/ Protein Kinase Inhibitors - pharmacology
/ Proteins
/ Reagents
/ Src
/ Tongue
/ Tumors
/ YD‐38
