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Purification of human IgG using membrane based hybrid bioseparation technique and its variants: A comparative study

机译:基于膜的杂交生物分离技术及其变异体纯化人IgG的比较研究

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This paper compares three different techniques for IgG purification from human serum, all of which are based on a recently developed membrane based hybrid bioseparation strategy, i.e. combination of salt induced precipitation, microfiltration and membrane adsorption as one unit operation [R. Ghosh, Separation of human albumin and IgG by a membrane-based integrated bioseparation technique involving simultaneous precipitation, microfiltration and membrane adsorption.J. Membr. Sci. 237 (2004) 109-117]. When used on its own, the standard hybrid bioseparation technique gave 93% recovery of IgG from human serum with 85% purity. In order to obtain higher IgG purity, caprylic acid based precipitation was investigated as a second purification step. As an alternative approach to this, caprylic acid precipitation was integrated with the standard hybrid bioseparation technique, resulting in a single step process. The antibody obtained using the three above mentioned techniques were then diafiltered to remove salts and caprylic acid and the overall purity and recovery were compared. The integrated hybrid-caprylic acid purification technique gave the highest IgG purity (95%) with the recovery being 55% while the purity and recovery using the two-step approach were 93% and 73% respectively. The trade off between purity, recovery and membrane fouling are discussed.
机译:本文比较了三种不同的从人血清中纯化IgG的技术,所有这些技术均基于最近开发的基于膜的混合生物分离策略,即将盐诱导的沉淀,微滤和膜吸附结合为一个单元操作[R. Ghosh,通过基于膜的集成生物分离技术分离人白蛋白和IgG,涉及同时沉淀,微滤和膜吸附。膜。科学237(2004)109-117]。当单独使用时,标准的杂交生物分离技术可从人血清中回收93%的IgG,纯度为85%。为了获得更高的IgG纯度,研究了基于辛酸的沉淀作为第二个纯化步骤。作为对此的替代方法,辛酸沉淀与标准的杂化生物分离技术集成在一起,从而实现了一步操作。然后将使用上述三种技术获得的抗体进行渗滤,以去除盐和辛酸,并比较总纯度和回收率。集成的杂交辛酸纯化技术可提供最高的IgG纯度(95%),回收率为55%,而采用两步法的纯度和回收率分别为93%和73%。讨论了纯度,回收率和膜污染之间的权衡。

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