Prothrombotic and Proinflammatory Activities of the β-Hemolytic Group B Streptococcal Pigment

Autor: Nikolai Siemens, Sonja Oehmcke-Hecht, Jörn Hoßmann, Sebastian B. Skorka, Roel H.T. Nijhuis, Corinne Ruppen, Steinar Skrede, Manfred Rohde, Daniel Schultz, Michael Lalk, Andreas Itzek, Dietmar H. Pieper, Christiaan J. van den Bout, Eric C.J. Claas, Ed J. Kuijper, Robert Mauritz, Parham Sendi, Herman F. Wunderink, Anna Norrby-Teglund
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Journal of Innate Immunity, Pp 1-13 (2019)
Druh dokumentu: article
ISSN: 1662-811X
1662-8128
DOI: 10.1159/000504002
Popis: A prominent feature of severe streptococcal infections is the profound inflammatory response that contributes to systemic toxicity. In sepsis the dysregulated host response involves both immunological and nonimmunological pathways. Here, we report a fatal case of an immunocompetent healthy female presenting with toxic shock and purpura fulminans caused by group B streptococcus (GBS; serotype III, CC19). The strain (LUMC16) was pigmented and hyperhemolytic. Stimulation of human primary cells with hyperhemolytic LUMC16 and STSS/NF-HH strains and pigment toxin resulted in a release of proinflammatory mediators, including tumor necrosis factor, interleukin (IL)-1β, and IL-6. In addition, LUMC16 induced blood clotting and showed factor XII activity on its surface, which was linked to the presence of the pigment. The expression of pigment was not linked to a mutation within the CovR/S region. In conclusion, our study shows that the hemolytic lipid toxin contributes to the ability of GBS to cause systemic hyperinflammation and interferes with the coagulation system.
Databáze: Directory of Open Access Journals
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