title: Down-regulation of TIMP-1 inhibits cell migration, invasion, and metastatic colonization in lung adenocarcinoma.
abstract: Tissue inhibitor metalloproteinase-1 (TIMP-1) is clinically associated with a poor prognosis for various cancers, but the roles of TIMP-1 in lung cancer metastasis are controversial. Our previous secretomic study revealed that TIMP-1 is highly abundant in high invasiveness cells of lung adenocarcinoma. In the current study, TIMP-1 abundances in primary lung adenocarcinoma tissues, as revealed by immunohistochemistry, are significantly higher in patients with lymph invasion and distant metastasis than in those without. Receiver operating characteristic curve analyses suggest 73.7 and 86.2 % accuracy to separate patients with lymph node and distant metastasis and those without, respectively. Moreover, we demonstrate that the expression level of TIMP-1 positively associates with cell mobility, invasiveness, and metastatic colonization. Most notably, the novel mechanism in which TIMP-1 facilitates metastatic colonization through the mediation of pericellular polyFN1 assembly was revealed. In summary, this study presents novel functions of TIMP-1 in promoting cancer metastasis and suggests TIMP-1 is a potential tissue biomarker for lymph invasion and distant metastasis of lung adenocarcinoma.
authors.affiliation: Institute of Biopharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan, edith129@gmail.com.
authors.forename: Ying-Hua
authors.initials: YH
authors.lastname: Chang
authors.forename: Yi-Jen
authors.initials: YJ
authors.lastname: Chiu
authors.forename: Hung-Chi
authors.initials: HC
authors.lastname: Cheng
authors.forename: Fang-Ju
authors.initials: FJ
authors.lastname: Liu
authors.forename: Wu-Wei
authors.initials: WW
authors.lastname: Lai
authors.forename: Hsiao-Jen
authors.initials: HJ
authors.lastname: Chang
authors.forename: Pao-Chi
authors.initials: PC
authors.lastname: Liao
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics* / Q000473:pathology; D000077192:Adenocarcinoma of Lung; D000328:Adult; D000368:Aged; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness / Q000235:genetics*; D009362:Neoplasm Metastasis; D011379:Prognosis; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D019715:Tissue Inhibitor of Metalloproteinase-1