Immunopathogenesis of porcine reproductive and respiratory syndrome in the respiratory tract of pigs.

Immunopathogenesis of porcine reproductive and respiratory syndrome in the respiratory tract of pigs.
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DOI:
10.1016/j.tvjl.2012.11.012
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发表时间:
2013-03
期刊:
Veterinary journal (London, England : 1997)
影响因子:
--
通讯作者:
Carrasco L
Carrasco L
中科院分区:
其他
文献类型:
--
作者:
Gómez-Laguna J;Salguero FJ;Pallarés FJ;Carrasco L

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猪繁殖与呼吸综合征(PRRS)病毒(PRRSV)通过破坏猪粘膜纤毛运输系统、损害猪肺泡巨噬细胞功能和诱导免疫细胞凋亡,从而损害局部肺免疫应答。在PRRS中,促炎性和抗炎性细胞因子(包括肿瘤坏死因子-α和白细胞介素-10)之间的不平衡可能损害肺的免疫反应。肺巨噬细胞亚群对不同PRRSV毒株具有不同的易感性和表达细胞因子的能力。PRRSV感染降低了巨噬细胞的杀菌活性,从而增加了继发性细菌感染的易感性。PRRSV感染与触珠蛋白浓度升高有关,触珠蛋白可能与病毒受体(CD163)相互作用并诱导抗炎介质的合成。促炎性和抗炎性细胞因子之间的平衡调节CD163的表达,这可能影响病毒在不同组织中的致病性和复制。随着高致病性PRRSV的出现,需要更多地了解不同PRRSV毒株的免疫发病机制,特别是开发更有效的疫苗。
Porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV) impairs local pulmonary immune responses by damaging the mucociliary transport system, impairing the function of porcine alveolar macrophages and inducing apoptosis of immune cells. An imbalance between pro- and anti-inflammatory cytokines, including tumour necrosis factor-α and interleukin-10, in PRRS may impair the immune response of the lung. Pulmonary macrophage subpopulations have a range of susceptibilities to different PRRSV strains and different capacities to express cytokines. Infection with PRRSV decreases the bactericidal activity of macrophages, which increases susceptibility to secondary bacterial infections. PRRSV infection is associated with an increase in concentrations of haptoglobin, which may interact with the virus receptor (CD163) and induce the synthesis of anti-inflammatory mediators. The balance between pro- and anti-inflammatory cytokines modulates the expression of CD163, which may affect the pathogenicity and replication of the virus in different tissues. With the emergence of highly pathogenic PRRSV, there is a need for more information on the immunopathogenesis of different strains of PRRS, particularly to develop more effective vaccines.
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