Anaplasma phagocytophilum MSP4 and HSP70 Proteins Are Involved in Interactions with Host Cells during Pathogen Infection

0479014 - BC 2018 RIV CH eng J - Journal Article
Contreras, M. - Alberdi, P. - Mateos-Hernández, L. - Fernández de Mera, I.G. - García-Pérez, A. L. - Vancová, Marie - Villar, M. - Ayllón, N. - Cabezas Cruz, Alejandro - Valdés, James J. - Stuen, S. - Gortazar, C. - de la Fuente, J.
Anaplasma phagocytophilum MSP4 and HSP70 Proteins Are Involved in Interactions with Host Cells during Pathogen Infection.
Frontiers in Cellular and Infection Microbiology. Roč. 7, JUL 5 (2017), č. článku 307. ISSN 2235-2988. E-ISSN 2235-2988
EU Projects: European Commission(XE) 278976 - ANTIGONE
Institutional support: RVO:60077344
Keywords : anaplasmosis * immunology * hl60 * tick * vaccine * sheep * Anaplasma phagocytophilum
OECD category: Immunology
Impact factor: 3.520, year: 2017

Anaplasrna phagocytophilum transmembrane and surface proteins play a role during infection and multiplication in host neutrophils and tick vector cells. Recently, A. phagocytophilum Major surface protein 4 (MSP4) and Heat shock protein 70 (HSP70) were shown to be localized on the bacterial membrane, with a possible role during pathogen infection in ticks. In this study, we hypothesized that A. phagocytophilum MSP4 and HSP70 have similar functions in tick-pathogen and host-pathogen interactions. To address this hypothesis, herein we characterized the role of these bacterial proteins in interaction and infection of vertebrate host cells. The results showed that A. phagocytophilum MSP4 and HSP70 are involved in host-pathogen interactions, with a role for HSP70 during pathogen infection. The analysis of the potential protective capacity of MSP4 and MSP4-HSP70 antigens in immunized sheep showed that MSP4-HSP70 was only partially protective against pathogen infection. This limited protection may be associated with several factors, including the recognition of non-protective epitopes by IgG in immunized lambs. Nevertheless, these antigens may be combined with other candidate protective antigens for the development of vaccines for the control of human and animal granulocytic anaplasmosis. Focusing on the characterization of host protective immune mechanisms and protein-protein interactions at the host-pathogen interface may lead to the discovery and design of new effective protective antigens.
Permanent Link: http://hdl.handle.net/11104/0275042