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    Osteosarcoma (OS) is a sarcoma with high rates of pulmonary metastases and mortality. The mechanisms underlying tumour generation and development in OS are not well-understood. Haematopoietic cell kinase (HCK), a vital member of the Src family of kinase proteins, plays crucial roles in cancer progression and may act as an anticancer target; however, the mechanism by which HCK enhances OS development remains unexplored. Therefore, we investigated the role of HCK in OS development in vitro and in vivo. Downregulation of HCK attenuated OS cell proliferation, migration and invasion and increased OS cell apoptosis, whereas overexpression of HCK enhanced these processes. Mechanistically, HCK expression enhanced OS tumorigenesis via the mitogen-activated protein kinase (MEK)/extracellular signal-regulated kinase (ERK) pathway; HCK upregulation increased the phosphorylation of MEK and ERK and promoted epithelial-mesenchymal transition, with a reduction in E-cadherin in vitro. Furthermore, HCK downregulation decreased the tumour volume and weight in mice transplanted with OS cells. In conclusion, HCK plays a crucial role in OS tumorigenesis, progression and metastasis via the MEK/ERK pathway, suggesting that HCK is a potential target for developing treatments for OS. © 2021 The Authors. Journal of Cellular and Molecular Medicine published by Foundation for Cellular and Molecular Medicine and John Wiley & Sons Ltd.


    Weibo Liu, Teng Li, Wenhao Hu, Quanbo Ji, Fanqi Hu, Qi Wang, Xiaoqing Yang, Dengbin Qi, Hui Chen, Xuesong Zhang. Hematopoietic cell kinase enhances osteosarcoma development via the MEK/ERK pathway. Journal of cellular and molecular medicine. 2021 Sep;25(18):8789-8795

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    PMID: 34363435

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