Cell Res:全新发现!寨卡病毒有可能治愈

2016-12-30 生物通 生物通

来自中科院遗传与发育生物学研究所,军事医学科学院等处的研究人员发现含有高滴度中和性抗体的寨卡病人康复期血清,可防治病毒感染胎儿的大脑,预防小头畸形症的发生。这也就是说孕期感染寨卡病毒有望治愈。这一研究成果公布在12月6日的Cell Research杂志上,参与研究的主要为遗传与发育生物学研究所许执恒研究员,军事医学科学院秦成峰研究员等。许执恒研究组的博士后王硕和研究生洪帅为共同第一作者。许执恒研究

来自中科院遗传与发育生物学研究所,军事医学科学院等处的研究人员发现含有高滴度中和性抗体的寨卡病人康复期血清,可防治病毒感染胎儿的大脑,预防小头畸形症的发生。这也就是说孕期感染寨卡病毒有望治愈。

这一研究成果公布在12月6日的Cell Research杂志上,参与研究的主要为遗传与发育生物学研究所许执恒研究员,军事医学科学院秦成峰研究员等。许执恒研究组的博士后王硕和研究生洪帅为共同第一作者。许执恒研究组主要结合信号转导通路,基因操作小鼠模式动物等技术,进行神经和疾病病理机制研究,希望阐明TGF信号通路在大脑发育中的作用,以及重要疾病发生的分子机制等。

2015年年中以来,寨卡病毒感染在南美洲暴发并在全球范围内播散蔓延。与之前比较温和的病情相比,2015年美洲疫情爆发特别值得人们警惕,当寨卡病毒在巴西爆发的同时,突然出现了大规模小头畸形的婴儿出生,这些婴儿的母亲大多感染了寨卡病毒。

今年5月,许执恒研究员与秦成峰研究员等人首次建立了寨卡病毒小头畸形动物模型,并证实寨卡病毒可以直接导致小头畸形的发生。他们在哺乳动物小鼠中发现,寨卡病毒可以在胚胎脑中快速复制,并感染神经干细胞,造成神经干细胞的增殖与分化异常,及神经元的大量死亡。最终导致大脑皮层变薄及小头畸形。通过全基因组表达谱分析,他们发现大量与免疫、小头畸形、寨卡病毒的潜在受体及细胞凋亡相关的基因出现明显异常。这项研究公布在Cell Stem Cell杂志上。

目前大多数寨卡病毒感染者症状温和,公众主要担心的是寨卡病毒感染孕妇可能导致新生儿小头症。目前尚无针对寨卡病毒感染的有效治疗方法和疫苗。因此,如何预防与治疗孕妇寨卡感染显得尤为重要。

在最新研究中,研究人员进行了药物筛选和相关研究,发现含有高滴度中和性抗体的寨卡病人康复期血清,可防治病毒感染胎儿的大脑,预防小头畸形症的发生。通过颅内注射的方法让胎鼠大脑感染寨卡病毒,并在感染后注射病人康复期血清。

许执恒研究组发现,康复期血清中的中和性抗体在体外能够有效抑制寨卡病毒的复制;在体内能通过胎盘及血脑屏障,非常明显地减少胎儿大脑中的病毒数量,保护胎儿。因此,在小鼠模型上的研究表明,孕期感染寨卡病毒有望治愈。该研究为寨卡病毒感染的治疗提供了极为重要的线索。


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    2017-08-06 维他命
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    2017-01-02 虈亣靌

    文章不错,值得学习

    0

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