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Systems immunology characterization of novel vaccine formulations for Mycoplasma hyopneumoniae bacterins

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Abstract
We characterized five different vaccine candidates and a commercial vaccine in terms of safety, immunogenicity and using a systems vaccinology approach, with the aim to select novel vaccine candidates against Mycoplasma hyopneumoniae. Seven groups of six M. hyopneumoniae-free piglets were primo-and booster vaccinated with the different experimental bacterin formulations, the commercial vaccine Hyogen (R) as a positive control or PBS as a negative control. The experimental bacterin was formulated with cationic liposomes + c-di-AMP (Lipo_AMP), cationic liposomes + Toll-like receptor (TLR) 2/1, TLR7, and TLR9 ligands (TLR ligands; Lipo_TLR), micro-particles + TLR ligands (PLGA_TLR), squalene-in-water emulsion + TLR ligands (SWE_TLR), or DDA: TDB liposomes (Lipo_DDA: TDB). Lipo_DDA: TDB and Lipo_AMP were the most potent in terms of serum antibody induction, and Lipo_DDA: TDB, Lipo_AMP, and SWE_TLR significantly induced Th1 cytokine-secreting T-cells. Only PLGA_TLR appeared to induce Th17 cells, but was unable to induce serum antibodies. The transcriptomic analyses demonstrated that the induction of inflammatory and myeloid cell blood transcriptional modules (BTM) in the first 24 h after vaccination correlated well with serum antibodies, while negative correlations with the same modules were found 7 days post-vaccination. Furthermore, many cell cycle and T-cell BTM upregulated at day seven correlated positively with adaptive immune responses. When comparing the delivery of the identical TLR ligands with the three formulations, we found SWE_TLR to be more potent in the induction of an early innate immune response, while the liposomal formulation more strongly promoted late cell cycle and T-cell BTM. For the PLGA formulation we found signs of a delayed and weak perturbation of these BTM. Lipo_AMP was found to be the most potent vaccine at inducing a BTM profile similar to that correlating with adaptive immune response in this and other studies. Taken together, we identified four promising vaccine candidates able to induce M. hyopneumoniae-specific antibody and T-cell responses. In addition, we have adapted a systems vaccinology approach developed for human to pigs and demonstrated its capacity in identifying early immune signatures in the blood relating to adaptive immune responses. This approach represents an important step in a more rational design of efficacious vaccines for pigs.
Keywords
Mycoplasma hyopneumoniae, bacterins, safety, immune responses, transcriptomics, IMMUNE-RESPONSES, IMPROVING VACCINE, WEIGHT-GAIN, PIGS, ADJUVANT, CELLS, EXPRESSION, PNEUMONIA, EFFICACY, REVEALS

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Chicago
Matthijs, Anneleen, Gaël Auray, Virginie Jakob, Obdulio García-Nicolás, Roman O Braun, Irene Keller, Rémy Bruggman, et al. 2019. “Systems Immunology Characterization of Novel Vaccine Formulations for Mycoplasma Hyopneumoniae Bacterins.” Frontiers in Immunology 10.
APA
Matthijs, A., Auray, G., Jakob, V., García-Nicolás, O., Braun, R. O., Keller, I., Bruggman, R., et al. (2019). Systems immunology characterization of novel vaccine formulations for Mycoplasma hyopneumoniae bacterins. FRONTIERS IN IMMUNOLOGY, 10.
Vancouver
1.
Matthijs A, Auray G, Jakob V, García-Nicolás O, Braun RO, Keller I, et al. Systems immunology characterization of novel vaccine formulations for Mycoplasma hyopneumoniae bacterins. FRONTIERS IN IMMUNOLOGY. 2019;10.
MLA
Matthijs, Anneleen et al. “Systems Immunology Characterization of Novel Vaccine Formulations for Mycoplasma Hyopneumoniae Bacterins.” FRONTIERS IN IMMUNOLOGY 10 (2019): n. pag. Print.
@article{8623943,
  abstract     = {We characterized five different vaccine candidates and a commercial vaccine in terms of safety, immunogenicity and using a systems vaccinology approach, with the aim to select novel vaccine candidates against Mycoplasma hyopneumoniae. Seven groups of six M. hyopneumoniae-free piglets were primo-and booster vaccinated with the different experimental bacterin formulations, the commercial vaccine Hyogen (R) as a positive control or PBS as a negative control. The experimental bacterin was formulated with cationic liposomes + c-di-AMP (Lipo_AMP), cationic liposomes + Toll-like receptor (TLR) 2/1, TLR7, and TLR9 ligands (TLR ligands; Lipo_TLR), micro-particles + TLR ligands (PLGA_TLR), squalene-in-water emulsion + TLR ligands (SWE_TLR), or DDA: TDB liposomes (Lipo_DDA: TDB). Lipo_DDA: TDB and Lipo_AMP were the most potent in terms of serum antibody induction, and Lipo_DDA: TDB, Lipo_AMP, and SWE_TLR significantly induced Th1 cytokine-secreting T-cells. Only PLGA_TLR appeared to induce Th17 cells, but was unable to induce serum antibodies. The transcriptomic analyses demonstrated that the induction of inflammatory and myeloid cell blood transcriptional modules (BTM) in the first 24 h after vaccination correlated well with serum antibodies, while negative correlations with the same modules were found 7 days post-vaccination. Furthermore, many cell cycle and T-cell BTM upregulated at day seven correlated positively with adaptive immune responses. When comparing the delivery of the identical TLR ligands with the three formulations, we found SWE_TLR to be more potent in the induction of an early innate immune response, while the liposomal formulation more strongly promoted late cell cycle and T-cell BTM. For the PLGA formulation we found signs of a delayed and weak perturbation of these BTM. Lipo_AMP was found to be the most potent vaccine at inducing a BTM profile similar to that correlating with adaptive immune response in this and other studies. Taken together, we identified four promising vaccine candidates able to induce M. hyopneumoniae-specific antibody and T-cell responses. In addition, we have adapted a systems vaccinology approach developed for human to pigs and demonstrated its capacity in identifying early immune signatures in the blood relating to adaptive immune responses. This approach represents an important step in a more rational design of efficacious vaccines for pigs.},
  articleno    = {1087},
  author       = {Matthijs, Anneleen and Auray, Gaël and Jakob, Virginie and García-Nicolás, Obdulio and Braun, Roman O and Keller, Irene and Bruggman, Rémy and Devriendt, Bert and Boyen, Filip and Guzman, Carlos A and Michiels, Annelies and Haesebrouck, Freddy and Collin, Nicolas and Barnier-Quer, Christophe and Maes, Dominiek and Summerfield, Artur},
  issn         = {1664-3224},
  journal      = {FRONTIERS IN IMMUNOLOGY},
  keywords     = {Mycoplasma hyopneumoniae,bacterins,safety,immune responses,transcriptomics,IMMUNE-RESPONSES,IMPROVING VACCINE,WEIGHT-GAIN,PIGS,ADJUVANT,CELLS,EXPRESSION,PNEUMONIA,EFFICACY,REVEALS},
  language     = {eng},
  pages        = {19},
  title        = {Systems immunology characterization of novel vaccine formulations for Mycoplasma hyopneumoniae bacterins},
  url          = {http://dx.doi.org/10.3389/fimmu.2019.01087},
  volume       = {10},
  year         = {2019},
}

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