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Gaballah EM, Morita K, Shimizu S, Elhenawy AA, Nabih N, Elsawey AM, Abdel-Mageed SA, Osada Y. Non-lethal rodent malarial infection prevents collagen-induced arthritis in mice via anti-arthritic immunomodulation. Parasite Immunol 2021; 44:e12901. [PMID: 34931316 DOI: 10.1111/pim.12901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 11/29/2022]
Abstract
AIMS Immunomodulatory effects of parasitic infections on the outcomes of allergic or autoimmune disorders have been addressed in many experimental studies. We examined the effects of Plasmodium yoelii 17X NL (Py) infection on collagen-induced arthritis (CIA). METHODS AND RESULTS Male DBA/1J mice were immunized with bovine type II collagen (IIC). Py inoculation was induced at three different time points (1, 4 weeks after or 4 weeks before the immunization). Only the inoculation at 4 weeks after IIC immunization significantly inhibited arthritis development. Non-malarial anaemia induced by phenylhydrazine hydrochloride (PHZ) did not affect arthritis development. In the infected mice, anti-IIC IgG levels were transiently reduced. In addition, splenic production of pro-arthritic cytokines (IL-17 and TNF-α) and IFN-γ decreased, whereas IL-10 production increased. Flow cytometric analysis clarified that the main IL-10 producers in Py-infected mice had the CD4+ CD25- Foxp3- phenotype, presumably Tr1 cells. CONCLUSION We demonstrated that experimental malarial infection alleviated autoimmune arthritis via immunomodulation, suggesting the importance of malaria in the hygiene hypothesis and the significance of searching for therapeutic immunomodulatory molecules from malarial parasites.
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Affiliation(s)
- Eman M Gaballah
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura, Egypt.,Department of Parasitology and Immunology, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan.,Department of Medical Parasitology, Faculty of Medicine, Damietta University, Damietta, Egypt
| | - Kentaro Morita
- Department of Parasitology and Immunology, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Shoichi Shimizu
- Department of Parasitology and Immunology, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Abeer A Elhenawy
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Nairmen Nabih
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Aliaa M Elsawey
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Salama A Abdel-Mageed
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Yoshio Osada
- Department of Parasitology and Immunology, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
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