Abstract
Purpose
It has been reported that the abnormal activation of receptor tyrosine kinases is associated with the development of many human carcinomas and the high activation of EGFR and Met mediates the tumorigenicity of laryngeal carcinoma. In this study, we have done the therapeutic efficacy of ME22S (a novel EGFR/Met bispecific antibody) in laryngeal carcinoma in vitro and in vivo was thoroughly evaluated.
Methods
The effects of ME22S on cell viability was assessed through MTT assays, and then Western blotting and immunocytochemistry were used to determine the expression of EGFR and Met. Also, wound healing and invasion assays were performed to observe the inhibitory effects of ME22S.
Results
We found the ability of ME22S reducing the expression of both EGFR and Met and significantly inhibiting the cell migration, invasion, and proliferation of SNU899 and HN3 in vitro. Also, the notably reduced levels of p-Met, p-ERK, and p-AKT were found when the cells were treated with only ME22S alone or with HGF together. Meanwhile, ME22S, interestingly enough, caused caspase-3-dependent apoptotic cell death when HN3 cells were treated with ME22S for 72 h, decreased the HGF-induced Slug expression, and also inhibited the tumor growth of HN3 cells in a xenograft model in vivo.
Conclusions
Taken together, our findings suggest that the dual inhibition of EGFR and Met through ME22S largely suppresses the invasion and growth of laryngeal carcinoma both in vitro and in vivo, hence, can be a practical approach as a novel therapeutic strategy for the treatment of laryngeal carcinoma.
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Acknowledgment
This study was supported by a Grant from the National Research Foundation of Korea (NRF) (2013R1A1A2059407) and Korean Health Technology R&D Project, Ministry of Health &Welfare (HI13C2009).
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Lee, BS., Kim, HJ., Hwang, JW. et al. The Dual Inhibition of Met and EGFR by ME22S, a Novel Met/EGFR Bispecific Monoclonal Antibody, Suppresses the Proliferation and Invasion of Laryngeal Cancer. Ann Surg Oncol 23, 2046–2053 (2016). https://doi.org/10.1245/s10434-015-5084-0
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DOI: https://doi.org/10.1245/s10434-015-5084-0