title: Sphingosine kinase 2 promotes colorectal cancer cell proliferation and invasion by enhancing MYC expression.
abstract: Colorectal cancer (CRC) is one of the most commonly diagnosed cancers and causes of cancer death in developed countries. SphK2 is overexpressed in a number of aggressive human carcinomas; however, the expression profile and potential function of SphK2 in CRC are still unknown. In this study, we investigated the SphK2 expression in tumoral tissue and the matched normal mucosae using quantitative real-time PCR (qRT-PCR), Western blot, and immunohistochemistry. We also evaluated the impact of SphK2 knockdown on CRC cell proliferation and metastasis in vitro. SphK2 was significantly upregulated in CRC tissue as compared to the matched normal mucosae, and significant overexpression was found in the LoVo CRC cell line. SphK2 depletion by specific small interfering RNA (siRNA) in the CRC cell line was found to affect cell proliferation and cell migration. Our data suggest that the pathogenesis of CRC maybe mediated by SphK2, and SphK2 could represent a selective target for the molecularly targeted treatments of CRC.
authors.affiliation: Department of Thoracic Surgery, First Affiliated Hospital of Liaoning Medical University, Jinzhou, 121001, Liaoning, People's Republic of China. drdrsunling6@163.com.
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Liaoning Medical University, Jinzhou, 121000, Liaoning, People's Republic of China.
authors.forename: Xuezheng
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Anatomy, Histology and Embryology, Liaoning Medical University, Jinzhou, 121000, Liaoning, People's Republic of China.
authors.forename: Zhongfu
authors.initials: Z
authors.lastname: Zuo
authors.affiliation: Nursing Department, First Affiliated Hospital of Liaoning Medical University, No. 2, Section 5, Renmin Street, Jinzhou, 121001, Liaoning, People's Republic of China.
authors.forename: Chunyan
authors.initials: C
authors.lastname: Hao
authors.affiliation: Nursing Department, First Affiliated Hospital of Liaoning Medical University, No. 2, Section 5, Renmin Street, Jinzhou, 121001, Liaoning, People's Republic of China.
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Ma
mesh_terms: D015153:Blotting, Western; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000235:genetics; D049109:Cell Proliferation / Q000235:genetics*; D015179:Colorectal Neoplasms / Q000235:genetics* / Q000378:metabolism; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D058990:Molecular Targeted Therapy / Q000379:methods; D009361:Neoplasm Invasiveness; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000235:genetics / Q000378:metabolism*; D016271:Proto-Oncogene Proteins c-myc / Q000378:metabolism*; D034741:RNA, Small Interfering / Q000235:genetics*; D060888:Real-Time Polymerase Chain Reaction; D000099157:Sphingosine Kinase
chemical_list: D017853:Phosphotransferases (Alcohol Group Acceptor); D016271:Proto-Oncogene Proteins c-myc; D034741:RNA, Small Interfering; C489427:MYC protein, human; C000594250:sphingosine kinase 2, human; D000099157:Sphingosine Kinase
keywords: Colorectal cancer; Proliferation; Small interfering RNA; SphK2; Targeted therapy