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da Silva ES, de Santana MBR, Silveira EF, Torres RT, Silva RC, Fernandes AMS, Belitardo EMMDA, Garcés LFS, Santiago LF, Urrego JR, Vilas-Bôas DS, de Freitas LAR, Zakzuk J, Pacheco LGC, Cruz ÁA, Ferreira F, Cooper P, Caraballo L, Pinheiro CDS, Alcantara-Neves NM. The hybrid protein BTH2 suppresses allergic airway inflammation in a murine model of HDM-specific immunotherapy. Clin Exp Allergy 2023; 53:821-832. [PMID: 36779555 DOI: 10.1111/cea.14293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/22/2023] [Accepted: 01/28/2023] [Indexed: 02/14/2023]
Abstract
BACKGROUND Allergen-specific immunotherapy (AIT) is the only disease-modifying treatment approach to change disease-causing allergens. Hypoallergenic derivatives show promise as potential therapeutics, amongst which BTH2 was designed to induce tolerance against Blomia tropicalis allergy. Our aim was to investigate the hypoallergenicity and immunoregulatory activity of BTH2 in vitro and its therapeutic potential in a mouse model of AIT. METHODS Recombinant Blo t 5 and Blo t 21 allergens and their hybrid derivatives (BTH1 and BTH2) were expressed and purified. IgE binding capacity was tested by ELISA using sera from Brazilian, Colombian, and Ecuadorian subjects. Secretion of cytokines in supernatants from human cell cultures was measured following stimulation with the four recombinants and controls. The capacity of BTH2 to ameliorate allergic airway inflammation induced by B. tropicalis extract was evaluated in a murine model of AIT. RESULTS rBlo t 5 and rBlo t 21 were identified as major allergens in Latin American patients, and BTH2 had the lowest IgE binding. In vitro stimulation of human cells induced greater levels of IL-10 and IFN-γ and reduced the secretion of Th2 cytokines. BTH2 ameliorated allergic airway inflammation in B. tropicalis-challenged A/J mice, as evidenced by the histopathological and humoral biomarkers: decreased Th2 cytokines and cellular infiltration (especially eosinophils), lower activity of eosinophil peroxidase, an increase in IgG blocking antibodies and strong reduction of mucus production by goblet cells. CONCLUSIONS Our study shows that BTH2 represents a promising candidate for the treatment of B. tropicalis allergy with hypoallergenic, immune regulatory and therapeutic properties. Further pre-clinical studies are required in murine models of chronic asthma to further address the efficacy and safety of BTH2 as a vaccine against B. tropicalis-induced allergy.
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Affiliation(s)
- Eduardo Santos da Silva
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Biotechnology of the Northeast Biotechnology Network (RENORBIO), Maceió, Brazil
| | - Marina Borges Rabelo de Santana
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | - Elisânia Fontes Silveira
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | - Rogério Tanan Torres
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | - Raphael Chagas Silva
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | | | - Emília Maria Medeiros de Andrade Belitardo
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FioCruz), Salvador, Brazil
| | - Luis Fabián Salazar Garcés
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Faculty of Health Sciences, Technical University of Ambato, Ambato, Ecuador
| | - Leonardo Freire Santiago
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | | | - Deise Souza Vilas-Bôas
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Laboratory of Histotechnology, Department of Biomorphology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | - Luiz Antônio Rodrigues de Freitas
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FioCruz), Salvador, Brazil
- Department of Pathology of the School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Josefina Zakzuk
- Institute of Immunological Research, University of Cartagena, Cartagena, Colombia
| | - Luis Gustavo Carvalho Pacheco
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | | | - Fatima Ferreira
- Department of Biosciences, Paris-Lodron University of Salzburg, Salzburg, Austria
| | - Philip Cooper
- Institute of Infection and Immunity, St George's University of London, London, UK
- School of Medicine, International University of Ecuador, Quito, Ecuador
| | - Luis Caraballo
- Institute of Immunological Research, University of Cartagena, Cartagena, Colombia
| | - Carina da Silva Pinheiro
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
| | - Neuza Maria Alcantara-Neves
- Laboratory of Allergology and Acarology (LAA), Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
- Post-Graduate Program in Biotechnology of the Northeast Biotechnology Network (RENORBIO), Maceió, Brazil
- Post-Graduate Program in Immunology, Institute of Health Sciences, Federal University of Bahia, Salvador, Brazil
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Shi W, Xu N, Wang X, Vallée I, Liu M, Liu X. Helminth Therapy for Immune-Mediated Inflammatory Diseases: Current and Future Perspectives. J Inflamm Res 2022; 15:475-491. [PMID: 35087284 PMCID: PMC8789313 DOI: 10.2147/jir.s348079] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 01/11/2022] [Indexed: 12/17/2022] Open
Affiliation(s)
- Wenjie Shi
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, People’s Republic of China
| | - Ning Xu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, People’s Republic of China
| | - Xuelin Wang
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, People’s Republic of China
| | - Isabelle Vallée
- UMR BIPAR, Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Mingyuan Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, People’s Republic of China
| | - Xiaolei Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, People’s Republic of China
- Correspondence: Xiaolei Liu; Mingyuan Liu, Tel +86-15943092280; +86-13019125996, Email ;
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Hambrook JR, Hanington PC. Immune Evasion Strategies of Schistosomes. Front Immunol 2021; 11:624178. [PMID: 33613562 PMCID: PMC7889519 DOI: 10.3389/fimmu.2020.624178] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 12/22/2020] [Indexed: 11/13/2022] Open
Abstract
Human schistosomes combat the unique immune systems of two vastly different hosts during their indirect life cycles. In gastropod molluscs, they face a potent innate immune response composed of variable immune recognition molecules and highly phagocytic hemocytes. In humans, a wide variety of innate and adaptive immune processes exist in proximity to these parasites throughout their lifespan. To survive and thrive as the second most common parasitic disease in humans, schistosomes have evolved many techniques to avoid and combat these targeted host responses. Among these techniques are molecular mimicry of host antigens, the utilization of an immune resistant outer tegument, the secretion of several potent proteases, and targeted release of specific immunomodulatory factors affecting immune cell functions. This review seeks to describe these key immune evasion mechanisms, among others, which schistosomes use to survive in both of their hosts. After diving into foundational observational studies of the processes mediating the establishment of schistosome infections, more recent transcriptomic and proteomic studies revealing crucial components of the host/parasite molecular interface are discussed. In order to combat this debilitating and lethal disease, a comprehensive understanding of schistosome immune evasion strategies is necessary for the development of novel therapeutics and treatment plans, necessitating the discussion of the numerous ways in which these parasitic flatworms overcome the immune responses of both hosts.
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Affiliation(s)
- Jacob R Hambrook
- School of Public Health, University of Alberta, Edmonton, AB, Canada
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