J HEPATOL:新加坡科学团队发现乙肝病毒的“弱点”,有望破解治愈乙肝的难题

2018-02-15 佚名 Medicalxpress

在缺乏保护蛋白段塞和SOX 7的情况下,乙肝病毒感染在肝细胞中大量繁殖。来自新加坡免疫学网络的研究人员发现,肝脏是乙型肝炎(HBV)复制的主要部位,不仅是因为它含有帮助病毒增殖的物质,而且还因为身体的大多数其他组织都含有积极抑制HBV复制的蛋白质。

在缺乏保护蛋白段塞和SOX 7的情况下,乙肝病毒感染在肝细胞中大量繁殖。来自新加坡免疫学网络的研究人员发现,肝脏是乙型肝炎(HBV)复制的主要部位,不仅是因为它含有帮助病毒增殖的物质,而且还因为身体的大多数其他组织都含有积极抑制HBV复制的蛋白质。

研究人员表示:“我们已经在这个项目上努力了很多年,因为乙肝病毒在亚洲非常流行,乙肝病毒通过特定的受体进入肝细胞,然后将其遗传物质沉积到细胞核中。”

接着,病毒DNA劫持宿主细胞来复制新的乙肝病毒。虽然我们知道肝细胞含有促进HBV复制的因素,但在此次研究中,研究人员发现,这些细胞也缺乏Slug和SOX 7的功能水平。

这些蛋白质存在于大多数其他人类组织中,它们与HBV基因组结合,并阻断启动和促进病毒复制的细胞蛋白质的结合。Slug和SOX 7参与胚胎发育,这是它们最活跃的时候,在发育之后,人们认为肝脏中不再需要这些蛋白质,因此会被“关闭”。

该团队目前正在使用CRISPR-Cas9等工具,基因编辑技术的先驱,用于生产没有任何功能的Slug或SOX 7蛋白的细胞。这使细胞对乙肝病毒感染的防御无效,从而可以用来测试新药的疗效。

“丙型肝炎抗病毒药物的开发之所以非常成功,是因为有可靠的、基于细胞的筛选方法。乙肝在这个方面一直缺乏,当我们将乙肝病毒导入这些缺乏病毒的细胞系时,它们的病毒载量会大幅增加,这为我们提供了一个大大改进的平台,以建立乙肝药物筛选试验。”

在他们的研究中,这个标志小组又发现了一个意想不到的发现:人类的结肠、肺和胃细胞也缺乏Slug和SOX 7。科学家们目前正与新加坡总医院的临床医生合作,对这些组织是否会成为乙肝病毒的潜在蓄积体,从而使疾病治疗复杂化展开彻底的调查。

原始出处:
Hui Ling Ko et al. Identification of Slug and SOX7 as transcriptional repressors binding to the hepatitis B virus core promoter, Journal of Hepatology (2017). DOI: 10.1016/j.jhep.2017.08.033

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    2018-02-17 gwc384
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    2018-02-16 1209e435m98(暂无昵称)

    学习了.谢谢分享

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    2018-02-15 wxl882001

    学习一下

    0

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    2018-02-15 wzb521zf

    一起学习学习

    0

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    2018-02-15 183****7028

    学习

    0

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