The hemolymph melanization response is related to defence against the AcMNPV infection in Bombyx mori

文献类型： 外文期刊

第一作者： Li, Tao

作者： Li, Tao;Wang, Xueyang;Qin, Sheng;Sun, Xia;Wang, Shengpeng;Li, Muwang;Wang, Xueyang;Qin, Sheng;Sun, Xia;Wang, Shengpeng;Li, Muwang;Li, Tao

作者机构：

关键词： AcMNPV; Bombyx mori; immune response; melanization; proPO activation cascade

期刊名称：ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：1.698； 五年影响因子：1.758 ）

ISSN： 0739-4462

年卷期： 2021 年 108 卷 1 期

页码：

收录情况： SCI

摘要： Melanization is mediated by the prophenoloxidase (proPO) activation cascade and plays an important role in the arthropods immune system. Previously, we found that the hemolymph of the p50 strain does not perform melanization after infection with Autographa californica multiple nucleopolyhedrovirus (AcMNPV). However, this mechanism is still unclear. In this study, the underlying mechanism of the inhibition of hemolymph melanization was investigated by analysing the AcMNPV-susceptible or -resistant silkworm strains after inoculation with AcMNPV. The results showed that the level of hemolymph melanization was higher in resistant strain C108 than in susceptible strain p50 at the late stage (72 to 120 h postinoculation). The PO activity decreased significantly at the late stage of infection (72 to 120 hpi), and the expression of BmPPO1 and BmPPO2 was downregulated in p50. However, the PO activity increased in the resistant strain C108, while the expression level of BmPPO1 and BmPPO2 displayed no significant changes. The expression of the BmPPAE gene was upregulated in two strains during viral infection. In addition, the hemolymph melanization can weaken the viral activity in vitro. Our results suggested that the silkworm hemolymph melanization response is related to defence against the AcMNPV infection.

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