title: Downregulation of CCR1 inhibits human hepatocellular carcinoma cell invasion.
abstract: CC chemokine receptor 1 (CCR1) has an important role in the recruitment of leukocytes to the site of inflammation. The migration and metastasis of tumor cells shares many similarities with leukocyte trafficking, which is mainly regulated by chemokine receptor-ligand interactions. CCR1 is highly expressed in hepatocellular carcinoma (HCC) cells and tissues with unknown functions. In this study, we silenced CCR1 expression in the human HCC cell line HCCLM3 using artificial microRNA (miRNA)-mediated RNA interference (RNAi) and examined the invasiveness and proliferation of CCR1-silenced HCCLM3 cells and the matrix metalloproteinase (MMP) activity. The miRNA-mediated knockdown expression of CCR1 significantly inhibited the invasive ability of HCCLM3 cells, but had only a minor effect on the cellular proliferation rate. Moreover, CCR1 knockdown significantly reduced the secretion of MMP-2. Together, these findings indicate that CCR1 has an important role in HCCLM3 invasion and that CCR1 might be a new target of HCC treatment.
authors.affiliation: Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai 200032, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Wu
authors.forename: Jia
authors.initials: J
authors.lastname: Fan
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zhou
authors.forename: Shuangjian
authors.initials: S
authors.lastname: Qiu
authors.forename: Yao
authors.initials: Y
authors.lastname: Yu
authors.forename: Yinkun
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhaoyou
authors.initials: Z
authors.lastname: Tang
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D015536:Down-Regulation; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism; D035683:MicroRNAs / Q000235:genetics; D009361:Neoplasm Invasiveness / Q000235:genetics / Q000473:pathology; D034622:RNA Interference; D054389:Receptors, CCR1; D019707:Receptors, Chemokine / Q000235:genetics / Q000378:metabolism*
chemical_list: C515300:CCR1 protein, human; D035683:MicroRNAs; D054389:Receptors, CCR1; D019707:Receptors, Chemokine; D020778:Matrix Metalloproteinase 2