Complement opsonization promotes HSV-2 infection of human dendritic cells
2016 (English)In: Journal of Virology, ISSN 0022-538X, E-ISSN 1098-5514, Vol. 90, no 10, 4939-4950 p.Article in journal (Refereed) Published
Herpes virus type 2 (HSV2) is one of the most common sexually transmitted infections globally with a very high prevalence in many countries. During HSV2 infection viral particles become coated with complement proteins and antibodies, both existent in the genital fluids, which could influence the activation of the immune responses. In genital mucosa, the primary target cells for HSV2 infection are epithelial cells, but resident immune cells such as dendritic cells (DCs) are also infected. The DCs are the activators of the ensuing immune responses directed against HSV2, and the aim of this study was to examine the effects opsonization of HSV2, either with complement alone or with complement and antibodies, had on the infection of immature DCs and their ability to mount inflammatory and antiviral responses. Complement opsonization of HSV2 enhanced both the direct infection of immature DCs and their production of new infectious viral particles. The enhanced infection required activation of the complement cascade and functional complement receptor 3. Furthermore, HSV2 infection of DCs required endocytosis of viral particles and their delivery into an acid endosomal compartment. The presence of complement in combination with HSV1 or HSV2 specific antibodies more or less abolished the HSV2 infection of DCs.Our results clearly demonstrate the importance of studying HSV2 infection under conditions that ensue in vivo, i.e. when the virions are covered in complement fragments and complement fragments and antibodies, as this will shape the infection and the subsequent immune response and needs to be further elucidated.
IMPORTANCE: During HSV2 infection viral particles should become coated with complement proteins and antibodies, both existent in the genital fluids, which could influence the activation of the immune responses. The dendritic cells are the activators of the immune responses directed against HSV2, and the aim of this study was to examine the effects of complement alone or complement and antibodies, on the HSV2 infection of dendritic cells and their ability to mount inflammatory and antiviral responses.Our results demonstrate that the presence of antibodies and complement in the genital environment can influence HSV2 infection under in vitro conditions that reflect the in vivo situation. We believe that our findings are highly relevant for the understanding of HSV2 pathogenesis.
Place, publisher, year, edition, pages
American society of microbiology , 2016. Vol. 90, no 10, 4939-4950 p.
HSV2 infection, dendritic cells, complement, antibodies
Infectious Medicine Microbiology in the medical area
IdentifiersURN: urn:nbn:se:liu:diva-126480DOI: 10.1128/JVI.00224-16ISI: 000375126100009PubMedID: 26937039OAI: oai:DiVA.org:liu-126480DiVA: diva2:915142
Funding agencies: Swedish Research Council [AI52731]; Swedish Physicians Against AIDS Research Foundation; Swedish International Development Cooperation Agency; SIDA SARC; VINNMER for Vinnova; Linkoping University Hospital Research Fund; Swedish Society of Medicine; Swedis2016-03-292016-03-292016-08-19