Shedding of kidney injury molecule-1 by membrane-type 1 matrix metalloproteinase

被引:19
作者
Guo, Luyang [1 ]
Takino, Takahisa [1 ]
Endo, Yoshio [1 ]
Domoto, Takahiro [1 ]
Sato, Hiroshi [1 ]
机构
[1] Kanazawa Univ, Dept Mol Virol & Oncol, Canc Res Inst, Kanazawa, Ishikawa 9201192, Japan
关键词
cell adhesion; invasive growth; KIM-1; MT1-MMP; shedding; RENAL-CELL CARCINOMA; EPISIALIN MUC1; TUMOR-CELLS; EXPRESSION; CANCER; ADHESION; INVASION; SURFACE; OVEREXPRESSION; INVOLVEMENT;
D O I
10.1093/jb/mvs082
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Co-expression of membrane-type 1 matrix metalloproteinase (MT1-MMP) with kidney injury molecule-1 (KIM-1) in HEK293T cells resulted in cleavage and shedding of KIM-1 ectodomain. Analysis of cleavage products using KIM-1 mutants localized cleavage site at the juxtamembrane region. HT1080 cells were stably transfected with expression plasmid for KIM-1 or its mutant with deletion of the juxtamembrane region (Asp(261)-Gly(295)) to establish HT/KIM-1 or HT/Delta KIM-1 cells, respectively. KIM-1 protein appeared on cell surface at low level in HT/KIM-1 cells, and accumulated by the treatment with MMP inhibitor BB-94 or small interfering RNA (siRNA) to MT1-MMP, indicating that MT1-MMP is involved in cleavage and shedding of KIM-1. In contrast, HT/Delta KIM-1 cells expressed KIM-1 protein at high level regardless of BB-94 or siRNA treatment. Cells expressing high level KIM-1 protein exhibited phagocytosis of Escherichia coli and reduced cell adhesion and spreading on collagen-coated plate compared with KIM-1 negative cells. Control HT1080 and HT/KIM-1 cells showed significantly higher invasive growth in collagen gel, cell migration on collagen-coated plate and liver metastasis in chick embryo than HT/Delta KIM-1 cells. These results suggest that KIM-1 negatively regulates cellular function mediated through interaction with collagen, and MT1-MMP abrogates it through the cleavage and shedding of KIM-1.
引用
收藏
页码:425 / 432
页数:8
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