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• W2917832881 endingPage "e0212751" @default.
• W2917832881 startingPage "e0212751" @default.
• W2917832881 abstract "Mycobacterium bovis Bacillus Calmette-Guérin (BCG) is a live attenuated vaccine for use against tuberculosis (TB); however, it is known to reduce childhood mortality from infections other than TB. The unspecific protection induced by BCG vaccination has been associated with the induction of memory-like traits of the innate immune system identified as ‘trained’ immunity. In humans and mouse models, in vitro and in vivo BCG training leads to enhanced production of monocyte-derived proinflammatory cytokines in response to secondary unrelated bacterial and fungal pathogens. While BCG has been studied extensively for its ability to induce innate training in humans and mouse models, BCG’s nonspecific protective effects have not been defined in agricultural species. Here, we show that in vitro BCG training induces a functional change in bovine monocytes, characterized by increased transcription of proinflammatory cytokines upon restimulation with the toll-like receptor agonists. Importantly, in vivo, aerosol BCG vaccination in young calves also induced a ‘trained’ phenotype in circulating peripheral blood mononuclear cells (PBMCs), that lead to a significantly enhanced TLR-induced proinflammatory cytokine response and changes in cellular metabolism compared to PBMCs from unvaccinated control calves. Similar to the long-term training effects of BCG reported in humans, our results suggest that in young calves, the effects of BCG induced innate training can last for at least 3 months in circulating immune populations. Interestingly, however, aerosol BCG vaccination did not ‘train’ the innate immune response at the mucosal level, as alveolar macrophages from aerosol BCG vaccinated calves did not mount an enhanced inflammatory response to secondary stimulation, compared to cells isolated from control calves. Together, our results suggest that, like mice and humans, the innate immune system of calves can be ‘trained’; and that BCG vaccination could be used as an immunomodulatory strategy to reduce disease burden in juvenile food animals before the adaptive immune system has fully matured." @default.
• W2917832881 created "2019-03-02" @default.
• W2917832881 creator A5037198982 @default.
• W2917832881 creator A5062937786 @default.
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• W2917832881 date "2019-02-22" @default.
• W2917832881 modified "2023-10-12" @default.
• W2917832881 title "Aerosol vaccination with Bacille Calmette-Guerin induces a trained innate immune phenotype in calves" @default.
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• W2917832881 doi "https://doi.org/10.1371/journal.pone.0212751" @default.
• W2917832881 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6386280" @default.
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• W2917832881 hasPublicationYear "2019" @default.
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