Background: SHC SH2-binding protein 1, a member of Src homolog and collagen homolog (Shc) family, has been recently identified in different contexts in unbiased screening assays. It has been reported to be over-expressed in several malignant cancers.
Methods: Immunohistochemistry of SHCBP1 on 128 breast cancer tissues and adjacent normal tissues were used to evaluate the prognostic significance of SHCBP1. Survival analyses were performed by Kaplan-Meier method. CRISPR/CAS9 method was used to knockout SHCBP1 expression. CRISPR/CAS9 technology was used to knockout SHCBP1 in 2 breast cancer cell lines. MTT assay, BrdU assay, colony formation assay, cell cycle assay and apoptosis analysis in MCF-7 and MDA-MB-231 cell lines were carried out to evaluate the effects of SHCBP1 on breast cancer in vitro.
Results: Immunohistochemical analysis revealed SHCBP1 was significantly up-regulated in breast cancer tissues compared with adjacent normal tissues (82 of 128, 64%). Over-expressed SHCBP1 was correlated with advanced clinical stage and poorer survival. Ablation of SHCBP1 inhibited the proliferation in vitro. SHCBP1 knockout increased cyclin-dependent kinase inhibitor p21, and decreased the Cyclin B1 and CDK1.
Conclusion: Our study suggests SHCBP1 is dysregulated expressed in breast cancer and plays a critical role in cancer progression, which can be a potential prognosis predictor of breast cancer.
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