Abstract:
:The entry of neutrophils into inflamed tissues is initiated by cell rolling on the blood vessel wall followed by arrest and transendothelial migration. Rolling is mediated by the selectins, while the two subsequent steps require activated beta 2-integrins. We have investigated whether the binding of P-selectin to mouse neutrophils could trigger the activation of beta 2-integrins. We show that cross-linking of P-selectin glycoprotein ligand-1 (PSGL-1) on mouse neutrophils with an antibody-like recombinant form of P-selectin or with monoclonal antibodies stimulated the production of reactive oxygen intermediates and enhanced neutrophil attachment to intercellular adhesion molecule 1 (ICAM-1)-expressing CHO cells. This effect was independent of whether complete antibodies or F(ab')2 fragments were used. The adhesion-stimulating effect of P-selectin could be blocked by monoclonal antibodies against PSGL-1. Increase of cell attachment was dependent on lymphocyte function-associated antigen 1 (LFA-1) and on Mac-1, since it could be blocked with antibodies against both respective integrin alpha-chains. Moreover, cell surface expression of Mac-1 increased upon cross-linking of PSGL-1. In agreement with published data, treatment of human neutrophils with P-selectin-IgG did not enhance attachment to ICAM-1. Our data suggest that ligation of PSGL-1 on mouse neutrophils, but not on human neutrophils, activates beta 2-integrin mediated cell attachment to ICAM-1.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Blanks JE,Moll T,Eytner R,Vestweber Ddoi
10.1002/(SICI)1521-4141(199802)28:02<433::AID-IMMUsubject
Has Abstractpub_date
1998-02-01 00:00:00pages
433-43issue
2eissn
0014-2980issn
1521-4141pii
10.1002/(SICI)1521-4141(199802)28:02<433::AID-IMMUjournal_volume
28pub_type
杂志文章abstract::Regulatory T (Treg) cells are critically important for the maintenance of immunological tolerance. Both centrally arising natural nTreg cells and those emerging in the periphery in response to TGF-β, iTreg cells, play a role in the control of unwanted immune responses. Treg cells adopt multiple mechanisms to inhibit e...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:1995-08-01 00:00:00
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journal_title:European journal of immunology
pub_type: 评论,杂志文章
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journal_title:European journal of immunology
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