The aim of this study was to establish a quality-control method for calcineurin subunit B(CNB) biological activity determinations. CNB enhances the p-nitrophenylphosphate(p NPP) dephosphorylating activity of calcineur...The aim of this study was to establish a quality-control method for calcineurin subunit B(CNB) biological activity determinations. CNB enhances the p-nitrophenylphosphate(p NPP) dephosphorylating activity of calcineurin subunit A Δ316 mutant(CNAΔ316). A series of CNB concentrations were fitted to a four-parameter equation to calculate the corresponding p NPP maximum dephosphorylation rates. Values were calculated based on biological activity references using a parallel line method. The method was then validated for accuracy, precision, linearity, linear range, sensitivity, specificity, and robustness. The recovery results were greater than 98%. Intra-plate precision was 6.7%, with inter-plate precision of 10.8%. The coefficient of determination was greater than 0.98. The linear range was 0.05–50 μg m L?1, with sensitivity of 50 μg m L?1. Tested cytokines did not induce CNAΔ316 dephosphorylation of p NPP. The chosen CNAΔ316 concentration range did not affect activity determinations.展开更多
目的:评价基于二氧化碳检测原理的BacT/ALERT 3D Dual-T?快速微生物检测系统作为药典无菌检查法的替代用于创新生物制品的可行性。方法:以细胞制品作为应用对象,参考各国药典及国外指导原则,研究快速方法在专属性、检测限、非劣效性方...目的:评价基于二氧化碳检测原理的BacT/ALERT 3D Dual-T?快速微生物检测系统作为药典无菌检查法的替代用于创新生物制品的可行性。方法:以细胞制品作为应用对象,参考各国药典及国外指导原则,研究快速方法在专属性、检测限、非劣效性方面是否可替代药典方法。结果:评价结果表明快速方法在专属性和检测限参数上达到了药典方法性能相当,大部分情况下可比药典方法更快地报告阳性结果,快速方法对产品质量的决策不劣于药典方法,且在数据完整性方面具备优势。结论:在风险管理的前提下,经验证的快速方法可作为药典无菌检查的替代方法用于创新生物制品的快速放行。展开更多
基金supported by the National Important Novel Medicine Research Project (2012ZX09304010, 2013ZX09102062)the National Natural Science Foundation of China (31270849)
文摘The aim of this study was to establish a quality-control method for calcineurin subunit B(CNB) biological activity determinations. CNB enhances the p-nitrophenylphosphate(p NPP) dephosphorylating activity of calcineurin subunit A Δ316 mutant(CNAΔ316). A series of CNB concentrations were fitted to a four-parameter equation to calculate the corresponding p NPP maximum dephosphorylation rates. Values were calculated based on biological activity references using a parallel line method. The method was then validated for accuracy, precision, linearity, linear range, sensitivity, specificity, and robustness. The recovery results were greater than 98%. Intra-plate precision was 6.7%, with inter-plate precision of 10.8%. The coefficient of determination was greater than 0.98. The linear range was 0.05–50 μg m L?1, with sensitivity of 50 μg m L?1. Tested cytokines did not induce CNAΔ316 dephosphorylation of p NPP. The chosen CNAΔ316 concentration range did not affect activity determinations.
文摘目的:评价基于二氧化碳检测原理的BacT/ALERT 3D Dual-T?快速微生物检测系统作为药典无菌检查法的替代用于创新生物制品的可行性。方法:以细胞制品作为应用对象,参考各国药典及国外指导原则,研究快速方法在专属性、检测限、非劣效性方面是否可替代药典方法。结果:评价结果表明快速方法在专属性和检测限参数上达到了药典方法性能相当,大部分情况下可比药典方法更快地报告阳性结果,快速方法对产品质量的决策不劣于药典方法,且在数据完整性方面具备优势。结论:在风险管理的前提下,经验证的快速方法可作为药典无菌检查的替代方法用于创新生物制品的快速放行。