tetano
Editor, Senior Moderator
Poult Sci
. 2022 Nov 3;102(1):102304.
doi: 10.1016/j.psj.2022.102304. Online ahead of print.
PA-X protein of H9N2 subtype avian influenza virus suppresses the innate immunity of chicken bone marrow-derived dendritic cells
Tao Qin[SUP] 1 [/SUP], Yulian Chen[SUP] 2 [/SUP], Dandan Huangfu[SUP] 2 [/SUP], Xinyu Miao[SUP] 2 [/SUP], Yinyan Yin[SUP] 3 [/SUP], Yuncong Yin[SUP] 1 [/SUP], Sujuan Chen[SUP] 1 [/SUP], Daxin Peng[SUP] 4 [/SUP], Xiufan Liu[SUP] 5 [/SUP]
Affiliations
Abstract
H9N2 subtype avian influenza (AI) is an infectious disease associated with immunosuppression in poultry. Here, the regulation function of PA-X protein was determined on the host innate immune response of H9N2-infected chicken bone marrow-derived DCs (chBM-DCs). Based on 2 mutated viruses expressing PA-X protein (rTX) or deficient PA-X protein (rTX-FS), and the established culture system of chBM-DCs, results showed PA-X protein inhibited viral replication in chBM-DCs but not in non-immune chicken cells (DF-1). Moreover, PA-X protein downregulated the expression of phenotypic markers (CD40, CD86, and MHCII) and proinflammatory cytokine (IL-12 and IL-1β) of chBM-DCs. The mixed lymphocyte reaction between chBM-DCs and chicken T cells showed PA-X protein significantly decreased H9N2-infected chBM-DCs to induce T cell proliferation, implying a suppression of the DC-induced downstream T cell response. Taken together, these findings indicated that PA-X protein is a key viral protein to help H9N2 subtype AIVs escape the innate immunity of chBM-DCs.
Keywords: H9N2; PA-X protein; avian influenza virus; chicken bone marrow-derived dendritic cells; innate immunity.
. 2022 Nov 3;102(1):102304.
doi: 10.1016/j.psj.2022.102304. Online ahead of print.
PA-X protein of H9N2 subtype avian influenza virus suppresses the innate immunity of chicken bone marrow-derived dendritic cells
Tao Qin[SUP] 1 [/SUP], Yulian Chen[SUP] 2 [/SUP], Dandan Huangfu[SUP] 2 [/SUP], Xinyu Miao[SUP] 2 [/SUP], Yinyan Yin[SUP] 3 [/SUP], Yuncong Yin[SUP] 1 [/SUP], Sujuan Chen[SUP] 1 [/SUP], Daxin Peng[SUP] 4 [/SUP], Xiufan Liu[SUP] 5 [/SUP]
Affiliations
- PMID: 36436371
- DOI: 10.1016/j.psj.2022.102304
Abstract
H9N2 subtype avian influenza (AI) is an infectious disease associated with immunosuppression in poultry. Here, the regulation function of PA-X protein was determined on the host innate immune response of H9N2-infected chicken bone marrow-derived DCs (chBM-DCs). Based on 2 mutated viruses expressing PA-X protein (rTX) or deficient PA-X protein (rTX-FS), and the established culture system of chBM-DCs, results showed PA-X protein inhibited viral replication in chBM-DCs but not in non-immune chicken cells (DF-1). Moreover, PA-X protein downregulated the expression of phenotypic markers (CD40, CD86, and MHCII) and proinflammatory cytokine (IL-12 and IL-1β) of chBM-DCs. The mixed lymphocyte reaction between chBM-DCs and chicken T cells showed PA-X protein significantly decreased H9N2-infected chBM-DCs to induce T cell proliferation, implying a suppression of the DC-induced downstream T cell response. Taken together, these findings indicated that PA-X protein is a key viral protein to help H9N2 subtype AIVs escape the innate immunity of chBM-DCs.
Keywords: H9N2; PA-X protein; avian influenza virus; chicken bone marrow-derived dendritic cells; innate immunity.