The purpose of this study was to measure the amount of adsorption of various salivary proteins to a resin composite having various amounts of surface pre-reacted glass-ionomer (S-PRG) fillers, and to make a comparativ...The purpose of this study was to measure the amount of adsorption of various salivary proteins to a resin composite having various amounts of surface pre-reacted glass-ionomer (S-PRG) fillers, and to make a comparative study of the adherence of S. mutans to the resin composite covered by various salivary proteins. We experimentally produced resin composites (S-PRG resin) having the basic composition of Bis-GMA/TEGDMA and various amount of the S-PRG fillers ranging between 0 - 60 wt%. Each S-PRG resin block was soaked in 5 kinds of components found in salivary fluid (Mucin 1, Lactoferrin, IgA, Cystatin C, and Lysozyme), and the amount of adsorption was measured by use of a spectrophotometer. The amount of the adsorption of salivary Mucin 1 was higher than that of any other salivary component tested regardless of the percentage of the S-PRG filler. In the case of salivary Lysoxyme used for coating, the amount of its adsorption increased with an increase in the percentage of the S-PRG filler. In addition, resin blocks coated with various salivary proteins were incubated at 37℃ for 2 hours with radio-labeled S. mutans for a quantitative adherence test. Labeled bacteria that adhered to the resin blocks were collected by using an automatic sample combustion system and a liquid scintillation counter. The absorbed salivary components, especially Mucin 1 and Lysozyme, inhibited the adhesion of S. mutans to the S-PRG resin;however, these changes were generally directional rather than statistically significant.展开更多
目的比较不同型号Protein A填料的性能,筛选合适的Protein A填料,用于大规模单克隆抗体(简称单抗)纯化。方法采用表达H02单抗的CHO细胞培养上清,测试不同供应商Protein A填料的蛋白结合载量,选择合适的填料,用于大规模单抗纯化;检测宿...目的比较不同型号Protein A填料的性能,筛选合适的Protein A填料,用于大规模单克隆抗体(简称单抗)纯化。方法采用表达H02单抗的CHO细胞培养上清,测试不同供应商Protein A填料的蛋白结合载量,选择合适的填料,用于大规模单抗纯化;检测宿主细胞蛋白(host cell protein,HCP)、外源DNA及Protein A残留量,以评价其纯化效果;检测Protein A柱在位清洗(cleaning in place,CIP)效果,并验证其循环使用次数。结果 Amsphere Protein A JWT203填料为合适的ProteinA填料,H02单抗大规模纯化后,可有效去除HCP、DNA及脱落Protein A;采用0.1 mol/L NaOH进行CIP,经过300个循环,对H02单抗仍保持80%以上动态结合载量,Protein A脱落无明显增加,对HCP、外源DNA、聚合体的去除能力无明显改变,层析图谱与初始基本一致,Amsphere Protein A JWT203填料的理化性质较稳定。结论 AmsphereProtein A JWT203是一种可用于大规模单抗纯化的新型Protein A填料。展开更多
文摘The purpose of this study was to measure the amount of adsorption of various salivary proteins to a resin composite having various amounts of surface pre-reacted glass-ionomer (S-PRG) fillers, and to make a comparative study of the adherence of S. mutans to the resin composite covered by various salivary proteins. We experimentally produced resin composites (S-PRG resin) having the basic composition of Bis-GMA/TEGDMA and various amount of the S-PRG fillers ranging between 0 - 60 wt%. Each S-PRG resin block was soaked in 5 kinds of components found in salivary fluid (Mucin 1, Lactoferrin, IgA, Cystatin C, and Lysozyme), and the amount of adsorption was measured by use of a spectrophotometer. The amount of the adsorption of salivary Mucin 1 was higher than that of any other salivary component tested regardless of the percentage of the S-PRG filler. In the case of salivary Lysoxyme used for coating, the amount of its adsorption increased with an increase in the percentage of the S-PRG filler. In addition, resin blocks coated with various salivary proteins were incubated at 37℃ for 2 hours with radio-labeled S. mutans for a quantitative adherence test. Labeled bacteria that adhered to the resin blocks were collected by using an automatic sample combustion system and a liquid scintillation counter. The absorbed salivary components, especially Mucin 1 and Lysozyme, inhibited the adhesion of S. mutans to the S-PRG resin;however, these changes were generally directional rather than statistically significant.
文摘目的比较不同型号Protein A填料的性能,筛选合适的Protein A填料,用于大规模单克隆抗体(简称单抗)纯化。方法采用表达H02单抗的CHO细胞培养上清,测试不同供应商Protein A填料的蛋白结合载量,选择合适的填料,用于大规模单抗纯化;检测宿主细胞蛋白(host cell protein,HCP)、外源DNA及Protein A残留量,以评价其纯化效果;检测Protein A柱在位清洗(cleaning in place,CIP)效果,并验证其循环使用次数。结果 Amsphere Protein A JWT203填料为合适的ProteinA填料,H02单抗大规模纯化后,可有效去除HCP、DNA及脱落Protein A;采用0.1 mol/L NaOH进行CIP,经过300个循环,对H02单抗仍保持80%以上动态结合载量,Protein A脱落无明显增加,对HCP、外源DNA、聚合体的去除能力无明显改变,层析图谱与初始基本一致,Amsphere Protein A JWT203填料的理化性质较稳定。结论 AmsphereProtein A JWT203是一种可用于大规模单抗纯化的新型Protein A填料。
