重组人肿瘤坏死因子受体-Fc融合蛋白质控方法和标准的研究

目的建立重组人肿瘤坏死因子受体-Fc融合蛋白质控方法和质量标准。方法用中和TNF-α生物学活性的方法测定重组人肿瘤坏死因子受体-Fc融合蛋白效价,用胰蛋白酶酶切分析肽图,用ELISA方法分别测定蛋白A、残留宿主细胞蛋白残留量和重组人肿瘤坏死因子受体-Fc融合蛋白含量。结果建立了重组人肿瘤坏死因子受体-Fc融合蛋白的生物学活性、肽图分析、残留蛋白A等质控方法和质量标准。结论建立的方法和质量标准已用于重组人肿瘤坏死因子受体-Fc融合蛋白产品的检定。

Study on methods and requirements for quality control of recombinant human tumor necrosis factor receptor Fc fusion protein

AIM: To establish methods and requirements for quality control of recombinant human tumor necrosis factor receptor Fc fusion protein (rhTNFR-Fc). METHODS: Biological potency of rhTNFR-Fc was determined by neutralizing the bioactivity of TNF-alpha. rhTNFR-Fc samples were reduced by beta-mercaptoethanol and the peptide map was performed by tryptic digestion. Residual protein A and the host cell protein content were detected by ELISA. Anti-TNFR and anti-Fc antibodies were used in ELISA for detection of the rhTNFR-Fc content. RESULTS: The quality control methods, such as bioassay, peptide map, residual protein A detection, were established and used for quality control of rhTNFR-Fc. The unit of rhTNFR-Fc (AU) was defined according to the international unit of TNF-alpha. The specific activity was up to 8 x 10(4) AU.mg-1. The requirements for quality control of rhTNFR-Fc were established. CONCLUSION: The methods and requirement were used for quality control of rhTNFR-Fc products.