近年来,新兴的医疗药物产品细胞和基因治疗(cellular and gene therapy,CGT)产品相关科学理论、技术手段、临床医疗实践发展蓬勃。由于CGT产品本身的特殊性、生产制造上的独特性和复杂性,以及生产技术的不断革新和优化,CGT产品在生产制...近年来,新兴的医疗药物产品细胞和基因治疗(cellular and gene therapy,CGT)产品相关科学理论、技术手段、临床医疗实践发展蓬勃。由于CGT产品本身的特殊性、生产制造上的独特性和复杂性,以及生产技术的不断革新和优化,CGT产品在生产制造上的成功变更往往是CGT产品在临床和上市商业化成功的重要保障。生产制造中的变更是产品生产中的关键环节,能否可行、适时实施、被合理适度监管,正在成为目前CGT产品公司和监管部门关注的重点。为促进我国CGT产品的研发和上市商业化产业与国际接轨,增强和巩固该产业在全球的竞争优势,本研究基于美国食品药品管理局(FDA)2023年7月最新出台的“人体CGT产品的生产变更和可比性”指南,结合国际上对生物医药产品生产变更的监管政策,在梳理当前CGT产品发展现状、阐述CGT产品特征的基础上,探讨CGT产品在临床试验期间和上市后进行生产制造的变更,以及对生产变更进行可比性研究的实施策略和符合监管要求的实施方案,并指出FDA指南的独特之处:①该指南专门针对CGT产品的生产变更和可比性研究;②考虑到CGT产品性质的特殊性、结构的复杂性、生产工艺的新颖性以及分析方法的多样性,该指南提出了全面且详细的建议和要求;③该指南是少有的既能针对上市产品、又能针对临床产品的生产变更和可比性研究的指南;④该指南追求生产变更管理细致化、建议和要求规范化。该指南不仅对CGT产品研发者和生产企业具有指导作用,而且对监管部门也有积极的借鉴意义。展开更多
Racotumomab monoclonal antibody is a murine anti-idiotypic antibody. This monoclonal antibody mimics N-glycolyl-GM3 gangliosides has been tested in several clinical trials Phase I/II for breast, melanoma and non-small...Racotumomab monoclonal antibody is a murine anti-idiotypic antibody. This monoclonal antibody mimics N-glycolyl-GM3 gangliosides has been tested in several clinical trials Phase I/II for breast, melanoma and non-small cell lung cancer patients as an anti-idiotypic cancer vaccine. The early production process was performed in vivo from mice ascites fluid. This process was transferred to bioreactor-based method at pilot scale followed to the scale-up of the fermentation. In this work we present a comprehensive molecular characterization of racotumomab MAb produced by the two different production scales in order to determine the impact of the manufacturing process in vaccine performance. We observed differences in glycosylation pattern and charge heterogeneity between racotumomab produced in both scales. Interestingly, these modifications had no significant impact on biological activity elicited in chickens. So, changes in primary structure like glycosylation, charge heterogeneity and oxidation did not affect biological activity of the vaccine.展开更多
文摘近年来,新兴的医疗药物产品细胞和基因治疗(cellular and gene therapy,CGT)产品相关科学理论、技术手段、临床医疗实践发展蓬勃。由于CGT产品本身的特殊性、生产制造上的独特性和复杂性,以及生产技术的不断革新和优化,CGT产品在生产制造上的成功变更往往是CGT产品在临床和上市商业化成功的重要保障。生产制造中的变更是产品生产中的关键环节,能否可行、适时实施、被合理适度监管,正在成为目前CGT产品公司和监管部门关注的重点。为促进我国CGT产品的研发和上市商业化产业与国际接轨,增强和巩固该产业在全球的竞争优势,本研究基于美国食品药品管理局(FDA)2023年7月最新出台的“人体CGT产品的生产变更和可比性”指南,结合国际上对生物医药产品生产变更的监管政策,在梳理当前CGT产品发展现状、阐述CGT产品特征的基础上,探讨CGT产品在临床试验期间和上市后进行生产制造的变更,以及对生产变更进行可比性研究的实施策略和符合监管要求的实施方案,并指出FDA指南的独特之处:①该指南专门针对CGT产品的生产变更和可比性研究;②考虑到CGT产品性质的特殊性、结构的复杂性、生产工艺的新颖性以及分析方法的多样性,该指南提出了全面且详细的建议和要求;③该指南是少有的既能针对上市产品、又能针对临床产品的生产变更和可比性研究的指南;④该指南追求生产变更管理细致化、建议和要求规范化。该指南不仅对CGT产品研发者和生产企业具有指导作用,而且对监管部门也有积极的借鉴意义。
文摘Racotumomab monoclonal antibody is a murine anti-idiotypic antibody. This monoclonal antibody mimics N-glycolyl-GM3 gangliosides has been tested in several clinical trials Phase I/II for breast, melanoma and non-small cell lung cancer patients as an anti-idiotypic cancer vaccine. The early production process was performed in vivo from mice ascites fluid. This process was transferred to bioreactor-based method at pilot scale followed to the scale-up of the fermentation. In this work we present a comprehensive molecular characterization of racotumomab MAb produced by the two different production scales in order to determine the impact of the manufacturing process in vaccine performance. We observed differences in glycosylation pattern and charge heterogeneity between racotumomab produced in both scales. Interestingly, these modifications had no significant impact on biological activity elicited in chickens. So, changes in primary structure like glycosylation, charge heterogeneity and oxidation did not affect biological activity of the vaccine.
