Nuclear Factor Kappa B Promotes Ferritin Heavy Chain Expression in Bombyx mori in Response to B. mori Nucleopolyhedrovirus Infection.

Nuclear Factor Kappa B Promotes Ferritin Heavy Chain Expression in Bombyx mori in Response to B. mori Nucleopolyhedrovirus Infection.
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DOI:
10.3390/ijms231810380
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发表时间:
2022-09-08
影响因子:
5.6
通讯作者:
Xu, Jiaping
Xu, Jiaping
中科院分区:
生物学2区
文献类型:
--
作者:
Zhu, Linbao;Liu, Yingxue;Wang, Ancheng;Chen, Xiya;Zhu, Handan;Huang, Zhihao;Cao, Huihua;Liu, Shihuo;Xu, Jiaping

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铁蛋白重链(FerHCH)是铁蛋白的主要组成部分,在维持铁稳态和氧化还原平衡方面发挥着重要作用。我们以前的研究已经证明家蚕铁蛋白重链同源物(BmFerHCH)可以对B产生应答。家蚕核型多角体病毒(BmNPV)感染。然而,BmNPV调节BmFerHCH表达的机制仍不清楚。在本研究中,BmNPV-BmFerHCH在BmNPV-BmN感染后增加,BmNPV-BmFerHCH在BmN细胞中增强核因子-κ B(NF-κB)活性。NF-κB抑制剂(PDTC)可降低病毒诱导的BmFerHCH在BmN细胞中的表达,而过表达NF-κB可增加病毒诱导的BmFerHCH在BmN细胞中的表达。此外,BmNPV感染增强了BmFerHCH启动子活性。利用JASPAR CORE数据库筛选BmFerHCH启动子中潜在的NF-κB顺式调控元件(克雷斯),并利用双荧光素酶报告系统和电泳迁移率变动分析(EMSA)鉴定出2个有效的NF-κB克雷斯。BmRelish(NF-κB)与NF-κB克雷斯结合,促进BmFerHCH的转录。总之,BmNPV促进BmRelish(NF-κB)的活化,活化的BmRelish(NF-κB)与BmFerHCH启动子的NF-κB克雷斯结合,增强BmFerHCH的表达。本研究为进一步研究BmFerHCH在BmNPV感染中的作用奠定了基础。
Ferritin heavy chain (FerHCH) is a major component of ferritin and plays an important role in maintaining iron homeostasis and redox equilibrium. Our previous studies have demonstrated that the Bombyx mori ferritin heavy chain homolog (BmFerHCH) could respond to B. mori nucleopolyhedrovirus (BmNPV) infection. However, the mechanism by which BmNPV regulates the expression of BmFerHCH remains unclear. In this study, BmFerHCH increased after BmNPV infection and BmNPV infection enhanced nuclear factor kappa B (NF-κB) activity in BmN cells. An NF-κB inhibitor (PDTC) reduced the expression of the virus-induced BmFerHCH in BmN cells, and overexpression of BmRelish (NF-κB) increased the expression of virus-induced BmFerHCH in BmN cells. Furthermore, BmNPV infection enhanced BmFerHCH promoter activity. The potential NF-κB cis-regulatory elements (CREs) in the BmFerHCH promoter were screened by using the JASPAR CORE database, and two effective NF-κB CREs were identified using a dual luciferase reporting system and electrophoretic mobility shift assay (EMSA). BmRelish (NF-κB) bound to NF-κB CREs and promoted the transcription of BmFerHCH. Taken together, BmNPV promotes activation of BmRelish (NF-κB), and activated BmRelish (NF-κB) binds to NF-κB CREs of BmFerHCH promoter to enhance BmFerHCH expression. Our study provides a foundation for future research on the function of BmFerHCH in BmNPV infection.
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