Nature:科学家证实巴西寨卡病毒可引发动物模型患小头畸形症

2016-05-17 佚名 生物谷

图片来源:medicalxpress.com 近日,刊登在国际杂志Nature上的一篇研究报告中,来自加州大学圣地亚哥医学院、巴西及塞内加尔的研究人员通过研究首次给出直接的实验证据,即证明巴西寨卡病毒实际上可以引发严重的婴儿出生缺陷。 文章中研究人员对小鼠模型、人类干细胞及体外培养的微型脑部结构(类器官)进行研究,研究者Muotri表示,在诸如巴西等地方随着寨卡病毒感染率的上升,往往会伴随

图片来源:medicalxpress.com

近日,刊登在国际杂志Nature上的一篇研究报告中,来自加州大学圣地亚哥医学院、巴西及塞内加尔的研究人员通过研究首次给出直接的实验证据,即证明巴西寨卡病毒实际上可以引发严重的婴儿出生缺陷。

文章中研究人员对小鼠模型、人类干细胞及体外培养的微型脑部结构(类器官)进行研究,研究者Muotri表示,在诸如巴西等地方随着寨卡病毒感染率的上升,往往会伴随着婴儿小头畸型发病率的增加,这二者之间或许存在某种关联,但目前并没有证据证实,而本文研究中我们就提出的直接的实验证据证明巴西寨卡病毒可以引发严重的婴儿出生缺陷(小头畸形)。

研究者开发出的这种确定寨卡病毒和小头畸形因果关系的特殊模型可以作为一种新型工具来帮助评估潜在疗法中和病毒的效力,利用这种新型平台科学家们就可以用来理解为何巴西寨卡病毒如此独特,同时还可以检测新型药物在抑制和病毒感染引发的神经学问题上的作用效果;此外研究者研究者们还开发出了一种强大的动物模型,而这种动物模型或会在测定潜在疫苗抵御病毒感染过程中被用到。

对小鼠模型的研究表明,小头畸形或许仅仅揭开了寨卡病毒感染的冰山一角而已,动物往往会在子宫内生长的时候发生生长停滞,而这就从根本上阐释了母体子宫内较差的胚胎发育情况;目前关于寨卡病毒的媒体报道主要关注于小头畸形如何影响婴儿的健康,因为但凡是和小头畸形相关的图片都让人非常触目惊心,但真正对婴儿的影响或许是广泛而且摧毁性的。

随后研究人员将人类大脑类器官暴露于寨卡病毒中进行研究,类器官是一种来自多能干细胞的三维细胞胚芽;研究结果表明,寨卡病毒的感染会导致类器官生长区域的减少并且会干扰皮质层的发育,此外巴西寨卡病毒还会对其他人类类器官皮质组织异常产生明显的影响。

研究者Muotri表示,我们在来自黑猩猩的类器官中检测了寨卡病毒的作用,以此来分析巴西寨卡同非洲寨卡病毒的适应性差异,结果表明,相比非洲寨卡病毒而言,巴西寨卡病毒在来自黑猩猩的类器官中复制率较低,这就表明巴西寨卡病毒或许更加适应于人类机体的环境,当然研究者还希望通过后期研究来调查是什么样的遗传特性导致非洲寨卡病毒和巴西寨卡病毒的差异。.

原始出处: 

Fernanda R. Cugola, Isabella R. Fernandes, Fabiele B. Russo et al.The Brazilian Zika virus strain causes birth defects in experimental  models.Natuer,11 May 2016.

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    2017-02-18 智慧医人
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    2016-05-18 wushaoling
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