Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus
Infectious bronchitis virus (IBV) is a highly contagious avian coronavirus. IBV causes substantial worldwide economic losses in the poultry industry. Vaccination with live-attenuated viral vaccines, therefore, are of critical importance. Live-attenuated viral vaccines, however, exhibit the potential...
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MDPI AG
2020-05-01
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| Series: | Vaccines |
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| Online Access: | https://www.mdpi.com/2076-393X/8/2/226 |
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| author | Frederik T. Larsen Bernt Guldbrandtsen Dennis Christensen Jacob Pitcovski Rikke B. Kjærup Tina S. Dalgaard |
| author_facet | Frederik T. Larsen Bernt Guldbrandtsen Dennis Christensen Jacob Pitcovski Rikke B. Kjærup Tina S. Dalgaard |
| author_sort | Frederik T. Larsen |
| collection | DOAJ |
| description | Infectious bronchitis virus (IBV) is a highly contagious avian coronavirus. IBV causes substantial worldwide economic losses in the poultry industry. Vaccination with live-attenuated viral vaccines, therefore, are of critical importance. Live-attenuated viral vaccines, however, exhibit the potential for reversion to virulence and recombination with virulent field strains. Therefore, alternatives such as subunit vaccines are needed together with the identification of suitable adjuvants, as subunit vaccines are less immunogenic than live-attenuated vaccines. Several glycan-based adjuvants directly targeting mammalian C-type lectin receptors were assessed in vitro using chicken bone marrow-derived dendritic cells (BM-DCs). The β-1-6-glucan, pustulan, induced an up-regulation of MHC class II (MHCII) cell surface expression, potentiated a strong proinflammatory cytokine response, and increased endocytosis in a cation-dependent manner. Ex vivo co-culture of peripheral blood monocytes from IBV-immunised chickens, and BM-DCs pulsed with pustulan-adjuvanted recombinant IBV N protein (rN), induced a strong recall response. Pustulan-adjuvanted rN induced a significantly higher CD4<sup>+</sup> blast percentage compared to either rN, pustulan or media. However, the CD8<sup>+</sup> and TCRγδ<sup>+</sup> blast percentage were significantly lower with pustulan-adjuvanted rN compared to pustulan or media. Thus, pustulan enhanced the efficacy of MHCII antigen presentation, but apparently not the cross-presentation on MHCI. In conclusion, we found an immunopotentiating effect of pustulan in vitro using chicken BM-DCs. Thus, future in vivo studies might show pustulan as a promising glycan-based adjuvant for use in the poultry industry to contain the spread of <i>coronaviridiae</i> as well as of other avian viral pathogens. |
| first_indexed | 2024-03-10T19:49:09Z |
| format | Article |
| id | doaj.art-f2e1016d53704cb59a04d7887b433fee |
| institution | Directory Open Access Journal |
| issn | 2076-393X |
| language | English |
| last_indexed | 2024-03-10T19:49:09Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Vaccines |
| spelling | doaj.art-f2e1016d53704cb59a04d7887b433fee2023-11-20T00:36:20ZengMDPI AGVaccines2076-393X2020-05-018222610.3390/vaccines8020226Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis VirusFrederik T. Larsen0Bernt Guldbrandtsen1Dennis Christensen2Jacob Pitcovski3Rikke B. Kjærup4Tina S. Dalgaard5Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, DenmarkCenter for Quantitative Genetics and Genomics, Blichers Allé 20, 8830 Tjele, DenmarkDepartment of Infectious Disease Immunology, Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen S, DenmarkVirology and Vaccine Development Laboratory, MIGAL Technology Center, Kiryat Shmona 11016, IsraelDepartment of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, DenmarkDepartment of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, DenmarkInfectious bronchitis virus (IBV) is a highly contagious avian coronavirus. IBV causes substantial worldwide economic losses in the poultry industry. Vaccination with live-attenuated viral vaccines, therefore, are of critical importance. Live-attenuated viral vaccines, however, exhibit the potential for reversion to virulence and recombination with virulent field strains. Therefore, alternatives such as subunit vaccines are needed together with the identification of suitable adjuvants, as subunit vaccines are less immunogenic than live-attenuated vaccines. Several glycan-based adjuvants directly targeting mammalian C-type lectin receptors were assessed in vitro using chicken bone marrow-derived dendritic cells (BM-DCs). The β-1-6-glucan, pustulan, induced an up-regulation of MHC class II (MHCII) cell surface expression, potentiated a strong proinflammatory cytokine response, and increased endocytosis in a cation-dependent manner. Ex vivo co-culture of peripheral blood monocytes from IBV-immunised chickens, and BM-DCs pulsed with pustulan-adjuvanted recombinant IBV N protein (rN), induced a strong recall response. Pustulan-adjuvanted rN induced a significantly higher CD4<sup>+</sup> blast percentage compared to either rN, pustulan or media. However, the CD8<sup>+</sup> and TCRγδ<sup>+</sup> blast percentage were significantly lower with pustulan-adjuvanted rN compared to pustulan or media. Thus, pustulan enhanced the efficacy of MHCII antigen presentation, but apparently not the cross-presentation on MHCI. In conclusion, we found an immunopotentiating effect of pustulan in vitro using chicken BM-DCs. Thus, future in vivo studies might show pustulan as a promising glycan-based adjuvant for use in the poultry industry to contain the spread of <i>coronaviridiae</i> as well as of other avian viral pathogens.https://www.mdpi.com/2076-393X/8/2/226chickenpustulanBM-DCIBVsubunit vaccinationadjuvant |
| spellingShingle | Frederik T. Larsen Bernt Guldbrandtsen Dennis Christensen Jacob Pitcovski Rikke B. Kjærup Tina S. Dalgaard Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus Vaccines chicken pustulan BM-DC IBV subunit vaccination adjuvant |
| title | Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus |
| title_full | Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus |
| title_fullStr | Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus |
| title_full_unstemmed | Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus |
| title_short | Pustulan Activates Chicken Bone Marrow-Derived Dendritic Cells In Vitro and Promotes Ex Vivo CD4<sup>+</sup> T Cell Recall Response to Infectious Bronchitis Virus |
| title_sort | pustulan activates chicken bone marrow derived dendritic cells in vitro and promotes ex vivo cd4 sup sup t cell recall response to infectious bronchitis virus |
| topic | chicken pustulan BM-DC IBV subunit vaccination adjuvant |
| url | https://www.mdpi.com/2076-393X/8/2/226 |
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