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CST6 protein and peptides inhibit breast cancer bone metastasis by suppressing CTSB activity and osteoclastogenesis

Theranostics. 2021-10; 
Xiaoxun Li, Yajun Liang, Cheng Lian, Fangli Peng, Yansen Xiao, Yunfei He, Chengxin Ma, Yuan Wang, Peiyuan Zhang, Yuhan Deng, Yunpeng Su, Cheng Luo, Xiangyin Kong, Qingcheng Yang, Tong Liu, Guohong Hu
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摘要

Bone metastasis is a frequent symptom of breast cancer and current targeted therapy has limited efficacy. Osteoclasts play critical roles to drive osteolysis and metastatic outgrowth of tumor cells in bone. Previously we identified CST6 as a secretory protein significantly downregulated in bone-metastatic breast cancer cells. Functional analysis showed that CST6 suppresses breast-to-bone metastasis in animal models. However, the functional mechanism and therapeutic potential of CST6 in bone metastasis is unknown. Using osteoclastogenesis and metastasis assays, we studied the effect and mechanism of extracellular CST6 protein in suppressing osteoclastic niches and bone metastasis of breast cancer. A number of... More

关键词

Bone metastasis, Breast cancer, CST6, Osteoclastogenesis, Peptide drug