Acquisition of C1 inhibitor by Bordetella pertussis virulence associated gene 8 results in C2 and C4 consumption away from the bacterial surface.

2.50
Hdl Handle:
http://hdl.handle.net/10029/621044
Title:
Acquisition of C1 inhibitor by Bordetella pertussis virulence associated gene 8 results in C2 and C4 consumption away from the bacterial surface.
Authors:
Hovingh, Elise S; van den Broek, Bryan; Kuipers, Betsy; Pinelli, Elena; Rooijakkers, Suzan H M; Jongerius, Ilse
Abstract:
Whooping cough, or pertussis, is a contagious disease of the respiratory tract that is re-emerging worldwide despite high vaccination coverage. The causative agent of this disease is the Gram-negative Bordetella pertussis. Knowledge on complement evasion strategies of this pathogen is limited. However, this is of great importance for future vaccine development as it has become apparent that a novel pertussis vaccine is needed. Here, we unravel the effect of Virulence associated gene 8 (Vag8) of B. pertussis on the human complement system at the molecular level. We show that both recombinant and endogenously secreted Vag8 inhibit complement deposition on the bacterial surface at the level of C4b. We reveal that Vag8 binding to human C1-inhibitor (C1-inh) interferes with the binding of C1-inh to C1s, C1r and MASP-2, resulting in the release of active proteases that subsequently cleave C2 and C4 away from the bacterial surface. We demonstrate that the depletion of these complement components in the bacterial surrounding and subsequent decreased deposition on B. pertussis leads to less complement-mediated bacterial killing. Vag8 is the first protein described that specifically prevents C1s, C1r and MASP-2 binding to C1-inh and thereby mediates complement consumption away from the bacterial surface. Unravelling the mechanism of this unique complement evasion strategy of B. pertussis is one of the first steps towards understanding the interactions between the first line of defense complement and B. pertussis.
Citation:
Acquisition of C1 inhibitor by Bordetella pertussis virulence associated gene 8 results in C2 and C4 consumption away from the bacterial surface. 2017, 13 (7):e1006531 PLoS Pathog.
Journal:
Plos Pathog 2017, 13(7):e1006531
Issue Date:
Jul-2017
URI:
http://hdl.handle.net/10029/621044
DOI:
10.1371/journal.ppat.1006531
PubMed ID:
28742139
Type:
Article
Language:
en
ISSN:
1553-7374
Appears in Collections:
Miscellaneous

Full metadata record

DC FieldValue Language
dc.contributor.authorHovingh, Elise Sen
dc.contributor.authorvan den Broek, Bryanen
dc.contributor.authorKuipers, Betsyen
dc.contributor.authorPinelli, Elenaen
dc.contributor.authorRooijakkers, Suzan H Men
dc.contributor.authorJongerius, Ilseen
dc.date.accessioned2018-01-09T09:21:41Z-
dc.date.available2018-01-09T09:21:41Z-
dc.date.issued2017-07-
dc.identifier.citationAcquisition of C1 inhibitor by Bordetella pertussis virulence associated gene 8 results in C2 and C4 consumption away from the bacterial surface. 2017, 13 (7):e1006531 PLoS Pathog.en
dc.identifier.issn1553-7374-
dc.identifier.pmid28742139-
dc.identifier.doi10.1371/journal.ppat.1006531-
dc.identifier.urihttp://hdl.handle.net/10029/621044-
dc.description.abstractWhooping cough, or pertussis, is a contagious disease of the respiratory tract that is re-emerging worldwide despite high vaccination coverage. The causative agent of this disease is the Gram-negative Bordetella pertussis. Knowledge on complement evasion strategies of this pathogen is limited. However, this is of great importance for future vaccine development as it has become apparent that a novel pertussis vaccine is needed. Here, we unravel the effect of Virulence associated gene 8 (Vag8) of B. pertussis on the human complement system at the molecular level. We show that both recombinant and endogenously secreted Vag8 inhibit complement deposition on the bacterial surface at the level of C4b. We reveal that Vag8 binding to human C1-inhibitor (C1-inh) interferes with the binding of C1-inh to C1s, C1r and MASP-2, resulting in the release of active proteases that subsequently cleave C2 and C4 away from the bacterial surface. We demonstrate that the depletion of these complement components in the bacterial surrounding and subsequent decreased deposition on B. pertussis leads to less complement-mediated bacterial killing. Vag8 is the first protein described that specifically prevents C1s, C1r and MASP-2 binding to C1-inh and thereby mediates complement consumption away from the bacterial surface. Unravelling the mechanism of this unique complement evasion strategy of B. pertussis is one of the first steps towards understanding the interactions between the first line of defense complement and B. pertussis.en
dc.language.isoenen
dc.rightsArchived with thanks to PLoS pathogensen
dc.subject.meshBacterial Proteins-
dc.subject.meshBordetella pertussis-
dc.subject.meshComplement C1-
dc.subject.meshComplement C2-
dc.subject.meshComplement C4-
dc.subject.meshHumans-
dc.subject.meshVirulence-
dc.subject.meshVirulence Factors, Bordetella-
dc.subject.meshWhooping Cough-
dc.titleAcquisition of C1 inhibitor by Bordetella pertussis virulence associated gene 8 results in C2 and C4 consumption away from the bacterial surface.en
dc.typeArticleen
dc.identifier.journalPlos Pathog 2017, 13(7):e1006531en

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