Abstract:
:The contact system is a plasma protease cascade that is initiated by coagulation factor XII activation on cardiovascular cells. The system starts procoagulant and proinflammatory reactions, via the intrinsic pathway of coagulation or the kallikrein-kinin system, respectively. The biochemistry of the contact system in vitro is well understood, however, its in vivo functions are just beginning to emerge. Data obtained in genetically engineered mice have revealed an essential function of the contact system for thrombus formation. Severe deficiency in contact system proteases impairs thrombus formation but does not reduce the hemostatic capacity of affected individuals. The system is activated by an inorganic polymer, polyphosphate that is released from activated platelets. Excessive inherited activation of the contact system causes a life-threatening swelling disorder, hereditary angioedema. Activation of the contact system by pathogens contributes to leakage in bacterial infections. Mast-cell-derived heparin triggers contact-system-mediated edema formation with implications for allergic disease states. Here we present an overview about the plasma contact system in occlusive and inflammatory disease and its contribution to health and pathology.
journal_name
Semin Immunopatholjournal_title
Seminars in immunopathologyauthors
Renné Tdoi
10.1007/s00281-011-0288-2subject
Has Abstractpub_date
2012-01-01 00:00:00pages
31-41issue
1eissn
1863-2297issn
1863-2300journal_volume
34pub_type
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,评审
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journal_title:Seminars in immunopathology
pub_type: 已发布勘误
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更新日期:2019-05-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,评审
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