The invention discloses a method for producing retrovirus, which adopts mouse-derived cell culture virus, and the serum concentration of the culture medium of mouse-derived cells decreases gradually during the culture period, replacing the culture medium containing lower serum concentration gradually with the medium containing higher serum concentration; harvesting the virus culture supernatant every day and supplementing the culture medium containing lower serum concentration every day; After low-speed centrifugation, virus precipitation was obtained by high-speed centrifugation directly, virus precipitation was suspended again, and high concentration virus was obtained by subassembly. The method of the invention has the advantages of low content of host cell component and low content of serum component in the harvested viral original solution, and after the first generation of viral culture is finished, the infected cells and the non-infected cells are mixed and transferred to a new culture bottle for continuous infection culture without freezing and resuscitation of the cells. The culture cycle is fast, and the serum concentration can be continuously harvested for many times in each generation. Low viral fluid, short time-consuming.
【技术实现步骤摘要】
逆转录病毒的生产方法
本专利技术属于生物
,特别是涉及一种病毒的生产方法。
技术介绍
为确保动物来源产品的安全性,国家相关法规要求需对产品的纯化生产工艺进行病毒清除灭活验证,通过加入模型病毒证明工艺可以清除或灭活一定对数值的病毒,即在病毒清除、灭活步骤将病毒掺入到样本中进行灭活,再用指示细胞检测具感染性病毒的变化值,或其他检测手段检测样品中病毒的残余量。(PointstoConsiderintheManufactureandTestingofMonoclonalAntibodyProductsforHumanUse,1997),(PointstoConsiderintheCharacterizationofCellLinesUsedtoProduceBiologicals,1993),(ICHQ5A(R1)掺入到样本中的病毒需满足两个条件,一是病毒中杂质含量低,以排除在感染性测试中非病毒可能导致的干扰、毒性,二是具感染性的病毒滴度高(大于7.0log10),以满足病毒清除灭活要求的病毒对数下降值。模型病毒之一,逆转录病毒,为RNA包膜病毒,生产常用的细胞为Musdunni细胞和minklung细胞(MRLander,SKChattopadhyay.AMusdunnicelllinethatlackssequencescloselyrelatedtoendogenousmurineleukemiavirusesandcanbeinfectedbyectropic,amphotropic,xenotropic,andminkcellfocus-formi ...
【技术保护点】
1.一种逆转录病毒生产方法,其特征在于,包括步骤:(1)采用鼠源细胞培养病毒,鼠源细胞的培养基的血清浓度有个递减的过程;(2)培养早期用较高浓度的血清,待细胞生长好后,逐步用含较低浓度血清的培养基更换含较高浓度血清的培养基,至少更换两次,待血清浓度低至2%时,每天收获病毒培养上清;(3)收获的培养上清经低速离心后收集上清,再采用高速离心获得病毒沉淀;重悬病毒沉淀,分装获得高浓度的病毒。
【技术特征摘要】
1.一种逆转录病毒生产方法,其特征在于,包括步骤:(1)采用鼠源细胞培养病毒,鼠源细胞的培养基的血清浓度有个递减的过程;(2)培养早期用较高浓度的血清,待细胞生长好后,逐步用含较低浓度血清的培养基更换含较高浓度血清的培养基,至少更换两次,待血清浓度低至2%时,每天收获病毒培养上清;(3)收获的培养上清经低速离心后收集上清,再采用高速离心获得病毒沉淀;重悬病毒沉淀,分装获得高浓度的病毒。2.如权利要求1所述的方法,其特征在于,所述方法还包括:步骤(4)病毒培养第一代结束后,不经细胞冻存复苏,将感染了病毒的鼠源细胞与未经病毒感染的细胞混合,并传至新的培养瓶中,采用与步骤(1)~(2)相同的培养方法开始下一代的病毒生产。3.如权利要求1所述的方法,其特征在于,所述步骤1)中,所述鼠源细胞为Musdunni细胞。4.如权利要求1所述的方法,其特征在于,...
【专利技术属性】
技术研发人员:范洁,苏财忠,童涌,
申请(专利权)人:苏州药明康德检测检验有限责任公司,
类型:发明
国别省市:江苏,32
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