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Saavedra F, Garrido JL, Fuentes-Villalobos F, Calvo M, Riquelme R, Rioseco ML, Chahín C, Ferreira L, Alvarez R, Nova-Lamperti E, Barria MI. Differential CD4 T Regulatory Cell Phenotype Induced by Andes Hantavirus Glycoprotein. Front Cell Infect Microbiol 2020; 10:430. [PMID: 32984065 PMCID: PMC7477076 DOI: 10.3389/fcimb.2020.00430] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 07/14/2020] [Indexed: 12/28/2022] Open
Abstract
Hantavirus cardiopulmonary syndrome (HCPS) caused by Andes orthohantavirus (ANDV) in South America is a public health threat due to the significant rate of mortality and the lack of a specific treatment. Interestingly, the virus does not produce cytopathic effect, thereby the strong antiviral immune response is suspected to contribute to pathogenesis, hence is important to understand the balance between protective and harmfully immunity. CD4+ T regulatory cells (Treg) are essential to control an exacerbated immune response. In human ANDV infection, little is known about CD4+ Treg cells, which may be involved in control immunopathology associated to the infection. In this report, we characterize the phenotype of memory CD4+ Tregs in a HCPS survivor's cohort. Based on the expression of CXCR3, CCR4, and CCR6, we identified different Th-like Treg populations in ANDV survival's PBMCs. In addition, the effect of ANDV-glycoprotein virus like particles (VLP) was determined. We demonstrated that memory CD4+ Treg from HCPS present a specific phenotype, showing higher frequency of PD-1 compared to healthy donors (HD). In addition, it was observed a decrease in the frequency of Th1-like memory CD4+ Treg in HCPS, important to highlight that this signature could be preserved even years after resolution of infection. Moreover, to gain insight in the mechanism involved, we evaluated whether ANDV-glycoprotein (GP) VLP could modulate CD4+ Treg. Interestingly, ANDV-GP VLP induced a decrease in the frequency of CXCR3 (Th1-like) and an increase in CCR4 (Th2-like) memory CD4+ Treg in both HD and HCPS PBMCs, indicating that ANDV-GP could specifically act over CXCR3 and CCR4 in CD4+ Treg. This report contributes to the study of human CD4+ Treg cells in ANDV infection.
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Affiliation(s)
- Farides Saavedra
- Department of Microbiology, Faculty of Biological Science, Biotechnology Center, Universidad de Concepción, Concepción, Chile
| | - Jose L Garrido
- Department of Microbiology, Faculty of Biological Science, Biotechnology Center, Universidad de Concepción, Concepción, Chile.,Ichor Biologics LLC, New York, NY, United States
| | - Francisco Fuentes-Villalobos
- Department of Microbiology, Faculty of Biological Science, Biotechnology Center, Universidad de Concepción, Concepción, Chile
| | - Mario Calvo
- Institute of Medicine, Universidad Austral de Chile, Valdivia, Chile
| | - Raúl Riquelme
- Hospital Puerto Montt Dr. Eduardo Schoütz Schroeder, Puerto Montt, Chile
| | | | - Carolina Chahín
- Hospital Regional Temuco Dr. Hernán Henríquez Aravena, Temuco, Chile
| | - Leonila Ferreira
- Hospital Clínico Regional Guillermo Grant Benavente, Concepción, Chile
| | | | - Estefania Nova-Lamperti
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepción, Concepción, Chile
| | - Maria Ines Barria
- Department of Microbiology, Faculty of Biological Science, Biotechnology Center, Universidad de Concepción, Concepción, Chile
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