Characterization of huJAM: evidence for involvement in cell-cell contact and tight junction regulation
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- Tony W. Liang
- Department of Immunology,
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- Richard A. DeMarco
- Department of Immunology,
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- Randy J. Mrsny
- Department of Pharmacology Research and Development,
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- Austin Gurney
- Department of Molecular Biology,
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- Alane Gray
- Department of Molecular Biology,
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- Jeffery Hooley
- Department of Cell Biology and Technology,
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- Holly L. Aaron
- Department of Cell Biology and Technology,
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- Arthur Huang
- Department of Molecular Biology,
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- Toni Klassen
- Department of Antibody Technology, and
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- Daniel B. Tumas
- Department of Pathology, Genentech, South San Francisco, California 94080
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- Sherman Fong
- Department of Immunology,
書誌事項
- 公開日
- 2000-12-01
- DOI
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- 10.1152/ajpcell.2000.279.6.c1733
- 公開者
- American Physiological Society
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説明
<jats:p> Cell-cell interactions of the mucosal epithelia are important for the maintenance and establishment of epithelial barrier function. During events of inflammation, such cell-cell interactions are often disrupted, resulting in a leaky epithelial barrier, which in turn can lead to various inflammatory and infective dysfunctions. Human junctional adhesion molecule (huJAM), found on the mucosal epithelia and vascular endothelia of many major organ systems, is a membrane glycoprotein which resolves to a doublet band of ∼40 and ∼37 kDa under SDS-PAGE analysis, representing differentially glycosylated forms of the same protein. huJAM was localized to the lateral membrane of Caco-2 cells (a human colonic epithelial cell line) monolayers, in an area basolateral of the epithelial tight junctions (TJ). Through functional and biochemical assays, we show huJAM to be able to homotypically associate and to participate in TJ restitution after trypsin-EDTA disruption. Furthermore, we also observed a migration of huJAM expression toward areas of cell-cell contacts during events of cell adhesion and monolayer formation. These qualities makes huJAM a likely player in the regulation of cell-cell contacts and the subsequent formation of TJs. </jats:p>
収録刊行物
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- American Journal of Physiology-Cell Physiology
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American Journal of Physiology-Cell Physiology 279 (6), C1733-C1743, 2000-12-01
American Physiological Society
