Tissue inhibitor of metalloproteinase 1 is a negative regulator of the metastatic ability of a human gastric cancer cell line, KKLS, in the chick embryo

Yuri Tsuchiya, Hiroshi Sato, Yoshio Endo, Yasunori Okada, Masayosi Mai, Takuma Sasaki, Motoharu Seiki

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)

Abstract

Tissue inhibitors of metalloproteinases (TIMPs) are the negative regulators of matrix metalloproteinases that degrade extracellular matrix. We examined the regulatory role of TIMP-1 in the metastatic activity of human gastric cancer cell lines in chick embryos because unregulated matrix metalloproteinase activities are belived to be essential during metastatic processes. One of the nine cell lines examined, KKLS cells, formed metastatic colonies in the chick livers. These cells expressed undetectable levels of TIMP-1, and this was not inducible by 12-O-tetradecanoylphorbol 13-acetate. Derivatives of KKLS cells with different levels of TIMP-1 expression were prepared by transfection of the human TIMP-1 complementary DNA controlled by a simian virus 40 early promoter. Metastatic abilities were suppressed by almost 70% in the transfectants expressing high levels of TIMP-1. In contrast, no suppression was observed in the control transfectants or in cells expressing the transfected TIMP-1 gene at low levels. These data indicate that a reduced expression of TIMP-1 in KKLS cells is responsible for their consequent metastatic potential. Moreover, it suggests that matrix metalloproteinase enzymatic activities are a prerequisite for metastatic activity in this experimental model system.

Original languageEnglish
Pages (from-to)1397-1402
Number of pages6
JournalCancer Research
Volume53
Issue number6
Publication statusPublished - 1993 Mar 15

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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