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科学家成功“量产”寨卡病毒 有助病毒研究及疫苗制备

2017-05-09 佚名 新华网

德国和巴西研究人员日前宣布,他们找到一种在实验室大量培养寨卡病毒的新方法,这将有助病毒研究及疫苗制备。

德国和巴西研究人员日前宣布,他们找到一种在实验室大量培养寨卡病毒的新方法,这将有助病毒研究及疫苗制备。

2015年5月以来,寨卡病毒在巴西等美洲国家大肆传播,疫苗研制迫在眉睫,而在实验室大量培养病毒是量产疫苗的重要前提。

病毒缺乏完整的酶系统和细胞器,必须寄生在活细胞中才能增殖,目前医学界常用非洲绿猴肾细胞和白纹伊蚊幼虫细胞作为培养病毒的细胞宿主。德国马克斯·普朗克协会下属复杂技术系统动力学研究所专家则选用BHK-21细胞系(幼年仓鼠肾细胞),并使其在液体培养基中生长。

研究发现,BHK-21细胞系非常适合寨卡病毒增殖,但不同地区的寨卡病毒分离株感染细胞后病毒产量存在差异,并不是所有的毒株都能高产。

在现有培养环境中,寨卡病毒所属的黄病毒在每个宿主细胞中仅能形成约10个有传染性的病毒颗粒。相比之下,流感病毒在每个宿主细胞中可形成数百个有传染性的病毒颗粒。因此,若想高效生产寨卡疫苗,要么寻找更高产的细胞系,或者在提高细胞浓度上下功夫。

如今,研究人员已将细胞浓度提高至传统培养方式的6倍,还通过调节生物反应器中温度、氧含量及酸碱度等方式,创造适宜病毒增殖的环境。经过近两周培养,研究人员从每毫升培养液中收获4000万个有传染性的病毒,足以开展大量病毒学研究。

研究人员表示,虽然人们早已成功利用BHK-21细胞系生产兽用疫苗,但其能否用于生产人类用疫苗仍需进一步研究。不过,有了“量产”病毒的新方法,已能对寨卡病毒进行传染病学、病毒学的深入研究。

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    2017-05-10 sillywu

    德国,果然又是德国,而不是中国。中国人务虚,德国人务实

    0

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    2017-05-10 天涯183

    非常好的文章,学习了,很受益

    0

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    2017-05-09 三生有幸9135

    学习一下谢谢分享

    0

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一类能专门杀死细菌的病毒——噬菌体,将来也许有一天会解决日益增长的超级细菌”感染问题。最近,贝勒医学院(BCM)等机构的科学家们发现,噬菌体可以有效地减少小鼠体内的细菌水平,包括对多种抗生素抗性的“超级细菌”,从而显著改善小鼠的健康。这一结果发表在《自然》子刊《Scientific Reports》上。

全口服直接抗丙肝病毒药物在中国上市,丙肝可以治愈了

高达91%-99%治愈率创治疗新标杆(2017年4月28日,中国北京)百时美施贵宝今天宣布,百立泽®(盐酸达拉他韦片)和速维普®(阿舒瑞韦软胶囊)作为首个全口服直接抗丙肝病毒联合治疗方案于近日获得国家食品药品监督管理总局(CFDA)批准,用于治疗成人基因1b型慢性丙型肝炎(非肝硬化或代偿期肝硬化)。此外,百立泽®同时被批准与其它药物如索磷布韦*联合,用于治疗成人泛基因型(即基因1-6型)慢性丙

CELL HOST MICROBE:这种前体病毒竟是导致HIV不能治愈的幕后黑手!

约翰霍普金斯大学和乔治华盛顿大学的研究人员报告了新的证据,证明由之前被认为无害的缺陷型HIV形成的蛋白质,实际上与我们的免疫系统相互作用,并被特定类型的免疫细胞(称为细胞毒性T细胞)主动监测。

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