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Functional and proteomic comparison of different techniques to produce equine anti-tetanus immunoglobulin F(ab')2 fragments.
Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences 2018 August 16
Tetanus is still a major cause of human deaths in several developing countries. In particular, the neonatal form remains a significant public health problem. According to the World Health Organization, administration of tetanus toxoid is recommended for neonatal tetanus patients. Furthermore, tetanus antitoxin or anti-tetanus immunoglobulin (Ig) are used for mild case or intensive care. This paper discusses a novel purification technique for improving equine anti-tetanus Ig production. First, equine plasma dealt with two steps salting out with ammonium sulfate; second, ultrafiltration concentration liquid purified by one successive protein G based affinity chromatography steps; finally, the purified F(ab')2 fragments was characterized using biochemical and proteomic methods and shown to be pure and homogeneous. Compared with the original technique product, specific activity increased by 80% (about 90,000 IU/g) and recovery of F(ab')2 is approximately equal 75%. Furthermore, Proteomic profiling of total technique process is demonstrated by nano-HPLC-MS and bioinformatics analysis. New technique to produce equine anti-tetanus immunoglobulin F(ab')2 fragments from crude plasma in high quality and yield. And it also could be used for industrial amplification.
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