Hepatology:干扰素-α对不同基因型乙肝病毒的作用研究!

2017-10-24 MedSci MedSci原创

干扰素-α(IFN-α)用于治疗慢性HBV感染,但是,只有20-40%的患者反应良好。临床观察表明,HBV基因型与IFN治疗的反应相关,然而,其在HBV感染肝细胞中对IFN的病毒反应性的作用尚不清楚。近期,一项发表在杂志Hepatology上的研究制造了HBV基因型A到基因型D的感染性病毒粒子,以感染三种基于细胞培养的HBV感染系统,包括原代人肝细胞(PHH),分化的HepaRG(dHepaRG)

干扰素-α(IFN-α)用于治疗慢性HBV感染,但是,只有20-40%的患者反应良好。临床观察表明,HBV基因型与IFN治疗的反应相关,然而,其在HBV感染肝细胞中对IFN的病毒反应性的作用尚不清楚。


近期,一项发表在杂志Hepatology上的研究制造了HBV基因型A到基因型D的感染性病毒粒子,以感染三种基于细胞培养的HBV感染系统,包括原代人肝细胞(PHH),分化的HepaRG(dHepaRG)和HepG2-NTCP细胞,定量比较了IFN-α抗病毒作用对HBV不同基因型和细胞模型的影响。

此项研究结果显示:在基因型A2、B5、C2和D3中,IFN-α对肝细胞HBV的作用基本相似,然而,在感染模型中,IFN-α的IC50值在PHH和dHepaRG细胞中抑制病毒DNA复制(< 20U/ml)的能力比在HepG2-NTCP细胞(> 500U/ml)低得多。

值得注意的是,即使在PHH中,在病毒抗原和DNA复制中间体强烈降低的浓度下,IFN-α也不会降低HBV cccDNA。三种细胞培养模型显示出对IFN-α的细胞反应差异。

患者对IFN-α反应相关的报道基因在PHH中被强烈诱导,而在IFN-α处理的HepG2-NTCP细胞中弱表达。 PHH或HepG2-NTCP细胞中IFN反应的减少或促进分别显着减弱或提高了IFN-α对HBV复制的抑制能力。

在此项基于HBV感染的细胞培养模型中,肝细胞中HBV对IFN-α的敏感性更多是由细胞固有的干扰素反应,而非病毒基因型,并且在HepG2-NTCP细胞中,IFN反应的改善促进了IFN-α对HBV的作用。

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    2017-10-26 gwc384
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    2017-10-24 中医痴

    不错的.学习了.学习分享!

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