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Kidney Injury Molecule-1 is Involved in the Chemotactic Migration of Mesenchymal Stem Cell

Research Authors
Kyung-Mee Park, Hyun-Suk Nam, Pankaj Kumar Teotia,
Kamal Hany Hussein, Seok-Ho Hong, Jung-Im Yun, Heung-Myong Woo
Research Abstract

A better understanding of the organ specific factors that regulate the migration of mesenchymal stem cells (MSCs) into the target organ is essential for optimization of strategies to improve the repair after injury. In the present study, we showed that the kidney injury molecule-1 (KIM-1), a well-known kidney-specific biomarker, enhanced the in vitro migration capacity of MSCs as a potent kidney-specific chemo-attractant or an inducer. The in vitro roles were verified by migration assay using KIM1-PK1 cell lines, the mouse proximal tubular epithelial cells (mPTEs) and recombinant human KIM-1 proteins (rhKIM-1). Immunofluorescence staining displayed specific ectodomain binding of KIM-1 on the surface of MSCs. Upregulation of chemokine receptor type 4 (CXCR4) protein when treated with tumor necrosis factor alpha (TNF-α) was shown. The effect of KIM-1 on migration of MSCs was augmented by TNF-α pretreatment in a dose-dependent manner, and reduced by AMD3100, an antagonist of CXCR4. These results suggest that KIM-1 is a potential chemo-ligand of CXCR4 and may play an important role in kidney-specific migration of MSCs via interaction between KIM-1 and CXCR4.

Research Department
Research Journal
In Vitro Cellular & Developmental Biology - Animal
Research Publisher
Springer
Research Rank
1
Research Vol
Vol 50, Issue 7
Research Website
http://www.ncbi.nlm.nih.gov/pubmed/24652046
Research Year
2014
Research Pages
648–655