In Vitro Analysis of TGF-beta Signaling Modulation of Porcine Alveolar Macrophages in Porcine Circovirus Type 2b Infection

文献类型： 外文期刊

第一作者： Yang, Shunli

作者： Yang, Shunli;Khan, Muhammad Umar Zafar;Liu, Baohong;Yin, Shuanghui;Cai, Jianping;Khan, Muhammad Umar Zafar;Humza, Muhammad;Cai, Jianping

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关键词： porcine circovirus 2; transforming growth factor-beta; mRNA; signaling pathway analysis

期刊名称：VETERINARY SCIENCES （ 影响因子：2.518； ）

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年卷期： 2022 年 9 卷 3 期

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收录情况： SCI

摘要： Porcine circovirus 2 (PCV2) has been recognized as an immunosuppressive pathogen. However, the crosstalk between this virus and its host cells in related signaling pathways remains poorly understood. In this study, the expression profiles of 84 genes involved in transforming growth factor-beta (TGF-beta) signaling pathway were probed in PCV2b-infected primary porcine alveolar macrophages (PAMs) by using an RT2 profiler PCR array system. The protein expression levels of cytokines involved in the TGF-beta signaling pathway were determined with a RayBiotech fluorescent Quantibody(R) porcine cytokine array system. Results showed that 48, 30, and 42 genes were differentially expressed at 1, 24, and 48 h after infection, respectively. A large number of genes analyzed by a co-expression network and implicated in transcriptional regulation and apoptosis were differentially expressed in PCV2b-infected PAMs. Among these genes, TGF-beta, interleukin-10, CCAAT/enhancer-binding protein beta (C/EBPB), growth arrest, and DNA-damage-inducible 45 beta (GADD45B), and BCL2 were upregulated. By contrast, SMAD family member 1 (smad1) and smad3 were downregulated. These results suggested that the TGF-beta signaling pathway was repressed in PAMs at the early onset of PCV2 infection. The inhibited apoptosis was indicated by the upregulated C/EBPB, GADD45B, and BCL2, and by the downregulated smad1 and smad3, which possibly increased the duration of PCV2 replication-permissive conditions and caused a persistent infection. Our study may provide insights into the underlying antiviral functional changes in the immune system of PCV2-infected pigs.

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