对感染撒哈拉以南非洲乙型肝炎病毒 (亚基因型) 的Huh7细胞进行比较蛋白质组分析,揭示了潜在的致癌因素
Kiyasha Padarath1, Aurélie Deroubaix1,2, Previn Naicker3
1Hepatitis Virus Diversity Unit, Department of Internal Medicine, School of Clinical Medicine, Faculty of Health Science, University of Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa.
Viruses
|July 27, 2024
概括
乙型肝炎病毒 (HBV) 亚基因型A1通过改变宿主细胞蛋白质表达,特别是RhoC在Ras途径中增加肝癌风险. 这种失调可能会推动撒哈拉以南非洲的肝癌发生.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 撒哈拉以南非洲 (SSA) 主要是乙型肝炎病毒 (HBV) 基因型A1,D3和E的庇护所.
- 乙型肝炎亚基因型A1感染与4.5倍更高的肝细胞癌 (HCC) 风险有关.
- 乙型肝炎病毒基因型对宿主蛋白表达和信号通路的影响在很大程度上仍未得到研究.
研究的目的:
- 调查由流行SSAHBV (亚基因型) 诱导的蛋白质和宿主信号通路的差异性变化.
- 阐明与HBV亚基因型A1.1相关的HCC风险增加背后的分子机制.
主要方法:
- 使用质谱法对Huh7细胞进行蛋白质组分析,这些细胞被复制能力强的HBV克隆感染.
- 定量mRNA分析和ELISA验证蛋白质表达变化和下游影响.
- 对不同HBV (亚基因型) 的蛋白质表达和信号通路失调的比较分析.
主要成果:
- 在SSA HBV (亚基因型) 之间观察到显著的蛋白质差异.
- 乙型肝炎病毒亚基因型A1独特地破坏了Ras信号通路的调节,在蛋白质和mRNA层面上调节了Ras相关蛋白RhoC.
- 虽然与RhoC相关的途径 (MAPK,PI3K/Akt/mTOR) 有关,但下游MMP2和MMP9表达仅显示非显著的增加.
结论:
- 乙型肝炎病毒 (亚基因型) 不同地影响宿主细胞蛋白质组和信号通路.
- 通过HBV亚基因型A1对RhoC的上调是一种关键的分子事件,可能有助于增加其肝癌致癌潜力.
- 对Ras相关蛋白质作为coproteins的进一步研究是有必要的,以了解HBV相关的HCC病原体.
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