title: CD151-mediated adhesion is crucial to osteosarcoma pulmonary metastasis.
abstract: CD151, a tetraspanin family protein involved in cell-cell and cell-extracellular matrix interaction, is differentially expressed in osteosarcoma cell membranes. Thus, this study aimed to investigate the role of CD151 in osteosarcoma metastasis. We analyzed CD151 expression in patient tissue samples using immunohistochemistry. CD151 expression was also silenced with shRNA in osteosarcoma cells of high metastatic potential, and cell adhesion, migration and invasion were evaluated in vitro and pulmonary metastasis was investigated in vivo. Mediators of cell signaling pathways were also examined following suppression of CD151 expression. Overall survival for patients with low versus high CD151 expression level was 94 vs. 41 months (p=0.0451). CD151 expression in osteosarcoma cells with high metastatic potential was significantly higher than in those with low metastatic potential (p<0.001). shRNA-mediated silencing of CD151 did not influence cell viability or proliferation; however, cell adhesion, migration and invasion were all inhibited (all p<0.001). In mice inoculated with shRNA-transduced osteosarcoma cells, the number and size of lung metastatic lesions were reduced compared to the mice inoculated with control-shRNA transduced cells (p<0.001). In addition, CD151 knockdown significantly reduced Akt, p38, and p65 phosphorylation as well as focal adhesion kinase, integrin β1, p70s6, and p-mTOR levels. Taken together, CD151 induced osteosarcoma metastasis likely by regulating cell function through adhesion signaling. Further studies are necessary to fully explore the diagnostic and prognostic value of determining CD151 expression in osteosarcoma patients.
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
authors.forename: Zhuoying
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
authors.forename: Chongren
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
authors.forename: Zifei
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
authors.forename: Mengxiong
authors.initials: M
authors.lastname: Sun
authors.affiliation: Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Chenghao
authors.initials: C
authors.lastname: Zhou
authors.affiliation: Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.affiliation: Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Yin
authors.affiliation: Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Hongsheng
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
authors.forename: Binhui
authors.initials: B
authors.lastname: Lin
authors.affiliation: Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Dongqing
authors.initials: D
authors.lastname: Zuo
authors.affiliation: Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Suoyuan
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Pathology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
authors.forename: Lijin
authors.initials: L
authors.lastname: Feng
authors.affiliation: Sarcoma Biology Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA.
authors.forename: Zhenfeng
authors.initials: Z
authors.lastname: Duan
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.|Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Zhengdong
authors.initials: Z
authors.lastname: Cai
authors.affiliation: Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.|Shanghai Bone Tumor Institution, Shanghai, 201620, China.
authors.forename: Yingqi
authors.initials: Y
authors.lastname: Hua
mesh_terms: D000818:Animals; D002448:Cell Adhesion; D002465:Cell Movement; D004195:Disease Models, Animal; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008175:Lung Neoplasms / Q000378:metabolism* / Q000401:mortality / Q000556:secondary; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D008819:Mice, Nude; D012516:Osteosarcoma / Q000378:metabolism* / Q000401:mortality / Q000473:pathology; D034741:RNA, Small Interfering / Q000235:genetics; D015398:Signal Transduction; D016019:Survival Analysis; D060185:Tetraspanin 24 / Q000235:genetics / Q000378:metabolism*; D046888:Tissue Array Analysis; D014407:Tumor Cells, Cultured; D023041:Xenograft Model Antitumor Assays
chemical_list: C554715:CD151 protein, human; D034741:RNA, Small Interfering; D060185:Tetraspanin 24
keywords: CD151; adhesion; metastasis; osteosarcoma; tetraspanin