抗体聚合可以导致蛋白A结合能力降低和低阶段产量
Gaoya Yuan1, Meng Qu1, Qi Geng2
1Downstream Process Development (DSPD), WuXi Biologics, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai, 200131, China.
Protein expression and purification
|June 4, 2023
概括
蛋白质A染色体对双特异抗体 (bsAbs) 的低产量是由聚合物引起的. 这些聚合物损害了结合能力,导致净化过程中的bsAb流量损失.
科学领域:
- 生物技术是生物技术.
- 生物制药制造业 生物制药制造业
- 蛋白质化学 蛋白质化学
背景情况:
- 蛋白A亲和染色体是抗体净化的标准方法.
- 高产量 (>90%) 通常在蛋白质A捕获步骤中实现.
- 双特异性抗体 (bsAbs) 提出了独特的净化挑战.
研究的目的:
- 调查蛋白质A捕获特定双特异抗体 (bsAb) 时产量低的原因.
- 确定导致结合能力降低的bsAb的形式.
- 确定恢复正常蛋白质A步产量的策略.
主要方法:
- 分析蛋白质A染色体的流通分数.
- 对bsAb聚合状态的评估.
- 蛋白A与单体相结合的比较与聚合的bsAb.
主要成果:
- 在蛋白质A捕获过程中,双特异性抗体 (bsAb) 的产量较低 (∼80%).
- 在低负载密度的流通中检测到bsAb.
- 通过流量分数主要包含聚合的bsAb.
- 装载净化的bsAb单体恢复了正常的蛋白质A步骤产量.
结论:
- 聚合双特异性抗体 (bsAb) 与受损的蛋白质A结合能力是低产量的原因.
- 聚合显著影响了最初抗体净化步骤的效率.
- 了解bsAb聚合对于优化生物过程至关重要.
更多相关视频
11:04Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast
Published on: June 23, 2018
7.4K
11:10Antibody Binding Specificity for Kappa (Vκ) Light Chain-containing Human (IgM) Antibodies: Polysialic Acid (PSA) Attached to NCAM as a Case Study
Published on: June 29, 2016
14.1K
相关概念视频
Antibody Actions
1.2K
Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
1.2K
Affinity and Avidity
36.4K
Overview
36.4K
Antibody Structure
60.5K
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
60.5K
Factors Affecting Protein-Drug Binding: Drug-Related Factors
147
Drug binding to proteins is a complex phenomenon influenced by various drug-related factors, each playing a significant role in the interaction between drugs and proteins within the body.
One crucial factor in drug-protein binding is the drug's lipophilicity or its affinity for fat. More lipophilic drugs tend to have higher binding extents. For example, highly lipophilic drugs like cloxacillin exhibit substantial protein binding, with as much as 95% of the drug binding to proteins. In...
One crucial factor in drug-protein binding is the drug's lipophilicity or its affinity for fat. More lipophilic drugs tend to have higher binding extents. For example, highly lipophilic drugs like cloxacillin exhibit substantial protein binding, with as much as 95% of the drug binding to proteins. In...
147
Immunoprecipitation
5.6K
Immunoprecipitation, or IP, is a widely used technique that employs protein-antibody interactions to isolate proteins or protein complexes in their native state for studying protein-protein interactions, quaternary structures, or supramolecular complexes. Various modifications of the technique, including chromatin IP, cross-linking IP, and fluorescence IP, are commonly used.
Chromatin Immunoprecipitation
Chromatin immunoprecipitation, also known as ChIP, is used to study protein-DNA or...
Chromatin Immunoprecipitation
Chromatin immunoprecipitation, also known as ChIP, is used to study protein-DNA or...
5.6K
Factors Affecting Protein-Drug Binding: Protein-Related Factors
203
Drug binding to proteins is a key aspect of pharmacokinetics and can influence a drug's distribution, absorption, and elimination in the body. Several factors, including the drug's physiochemical properties, protein concentration, disease states, and the number of binding sites on the protein, influence this process.
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
203
