Correlation between systemic allergen desensitisation and long-term asthma protection in mice following intravenous administration of the live tuberculosis vaccine MTBVAC
Calvo, Silvia ; Rodrigo-Muñoz, Jose Manuel ; Tarancón, Raquel ; Uranga, Santiago (Universidad de Zaragoza) ; Martín, Carlos (Universidad de Zaragoza) ; Pozo, Victoria del ; Aguiló, Nacho (Universidad de Zaragoza)
Resumen: Background
MTBVAC is a live attenuated tuberculosis vaccine, currently undergoing phase III evaluation for tuberculosis prevention. In previous preclinical studies, we found that local pulmonary administration of MTBVAC via the intranasal route had a strong therapeutic effect against asthma. This effect correlated with the abrogation of allergen-specific Th2 response in the lungs.
Methods
Using different mouse models of asthma, we investigated the effect of MTBVAC administered by intravenous (IV) route and its potential as immunotherapeutic agent to induce desensitisation of allergen-specific responses at a systemic level. We explored the effects of this process in the efficacy against airway hyperresponsiveness (AHR) induced by exposure to different allergens.
Findings
IV MTBVAC was highly efficient at reducing AHR induced by different allergens. Additionally, IV MTBVAC was found to be well-tolerated, being progressively eliminated from the different organs analysed. From a mechanistic standpoint, we observed that MTBVAC intravenous, but not intranasal, impaired allergen-specific Th2 response in both lungs and spleen. This reduction at a systemic level correlated with long-term therapeutic protection against allergen exposure. Our results also revealed differential immunological mechanisms governing systemic and local pulmonary allergen desensitisation processes. Notably, in a cohort of patients with asthma sensitive to house dust mite (HDM), in vitro incubation of peripheral blood mononuclear cells (PBMCs) with MTBVAC prevented allergen-specific production of Th2 cytokines IL-4 and IL-5.
Interpretation
Altogether, our results suggest that intravenous MTBVAC could be a plausible allergen desensitising approach for treatment of asthma, and could provide long-term protection against allergen exposure.
Idioma: Inglés
DOI: 10.1016/j.ebiom.2024.105272
Año: 2024
Publicado en: EBioMedicine 107 (2024), 105272 [16 pp.]
ISSN: 2352-3964
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/CB06-06-0013
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/CB06-06-0020
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-138624OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RTI2018-097625-B-100
Tipo y forma: Article (Published version)
Área (Departamento): Área Microbiología (Dpto. Microb.Ped.Radio.Sal.Pú.)
Área (Departamento): Área Inmunología (Dpto. Microb.Ped.Radio.Sal.Pú.)
Área (Departamento): Proy. investigación HQA (Dpto. Microb.Ped.Radio.Sal.Pú.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material.
Exportado de SIDERAL (2024-09-12-13:06:22)
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MTBVAC is a live attenuated tuberculosis vaccine, currently undergoing phase III evaluation for tuberculosis prevention. In previous preclinical studies, we found that local pulmonary administration of MTBVAC via the intranasal route had a strong therapeutic effect against asthma. This effect correlated with the abrogation of allergen-specific Th2 response in the lungs.
Methods
Using different mouse models of asthma, we investigated the effect of MTBVAC administered by intravenous (IV) route and its potential as immunotherapeutic agent to induce desensitisation of allergen-specific responses at a systemic level. We explored the effects of this process in the efficacy against airway hyperresponsiveness (AHR) induced by exposure to different allergens.
Findings
IV MTBVAC was highly efficient at reducing AHR induced by different allergens. Additionally, IV MTBVAC was found to be well-tolerated, being progressively eliminated from the different organs analysed. From a mechanistic standpoint, we observed that MTBVAC intravenous, but not intranasal, impaired allergen-specific Th2 response in both lungs and spleen. This reduction at a systemic level correlated with long-term therapeutic protection against allergen exposure. Our results also revealed differential immunological mechanisms governing systemic and local pulmonary allergen desensitisation processes. Notably, in a cohort of patients with asthma sensitive to house dust mite (HDM), in vitro incubation of peripheral blood mononuclear cells (PBMCs) with MTBVAC prevented allergen-specific production of Th2 cytokines IL-4 and IL-5.
Interpretation
Altogether, our results suggest that intravenous MTBVAC could be a plausible allergen desensitising approach for treatment of asthma, and could provide long-term protection against allergen exposure.
Idioma: Inglés
DOI: 10.1016/j.ebiom.2024.105272
Año: 2024
Publicado en: EBioMedicine 107 (2024), 105272 [16 pp.]
ISSN: 2352-3964
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/CB06-06-0013
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/CB06-06-0020
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-138624OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RTI2018-097625-B-100
Tipo y forma: Article (Published version)
Área (Departamento): Área Microbiología (Dpto. Microb.Ped.Radio.Sal.Pú.)
Área (Departamento): Área Inmunología (Dpto. Microb.Ped.Radio.Sal.Pú.)
Área (Departamento): Proy. investigación HQA (Dpto. Microb.Ped.Radio.Sal.Pú.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material. Exportado de SIDERAL (2024-09-12-13:06:22)
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