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The tick-over theory revisited: Is C3 a contact-activated protein?
Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.ORCID-id: 0000-0001-7888-1571
2012 (Engelska)Ingår i: Immunobiology, ISSN 0171-2985, E-ISSN 1878-3279, Vol. 217, nr 11, s. 1106-1110Artikel, forskningsöversikt (Refereegranskat) Published
Abstract [en]

The tick-over theory was first introduced in the 1970s to explain the presence of the initial C3b molecules, which are able to trigger complement activation by the alternative pathway in human plasma under physiological conditions. After the identification of the thioester, the predominant hypothesis has been that this bond is hydrolyzed at a slow but constant rate by nucleophilic attack by H2O, leading to the generation of C3(H2O). Here we put forward the hypothesis that the rate of hydrolysis of C3 to C3(H2O) may be greatly accelerated by the interaction between C3 and a number of biological and artificial interfaces, including gas bubbles, biomaterial surfaces and different lipid surfaces and complexes. We therefore propose that C3 should preferentially be regarded as a contact activated protein rather than a target for passive, random hydrolysis in the fluid phase. (C) 2012 Elsevier GmbH. All rights reserved.

Ort, förlag, år, upplaga, sidor
2012. Vol. 217, nr 11, s. 1106-1110
Nyckelord [en]
Blood interfaces, C3, C3(H2O), Contact activation, Surface interaction, Thioester, Tick-over
Nationell ämneskategori
Immunologi
Forskningsämne
Biomedicinsk vetenskap, Immunologi
Identifikatorer
URN: urn:nbn:se:lnu:diva-23352DOI: 10.1016/j.imbio.2012.07.008ISI: 000311187800010Scopus ID: 2-s2.0-84866014027OAI: oai:DiVA.org:lnu-23352DiVA, id: diva2:584570
Tillgänglig från: 2013-01-09 Skapad: 2013-01-09 Senast uppdaterad: 2017-12-06Bibliografiskt granskad

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Nilsson Ekdahl, Kristina

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