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相关概念视频

Typical Model Studies01:30

Typical Model Studies

175
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
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相关实验视频

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Author Spotlight: Advancing Gene Therapy Research with High-Titer Adeno-Associated Virus Vector Production
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使用计算流体动力学建模,开发可扩展的工艺,用于rAAV短暂转化生产.

Jianfa Ou1, Yawen Tang1, Alexander Williams1

  • 1Biologics Development, Global Product Development and Supply, Bristol Myers Squibb, Devnes, Massachusetts, USA.

Biotechnology progress
|April 4, 2025
PubMed
概括

这项研究通过控制生物反应器中的剪切应力来优化复合腺相关病毒 (rAAV) 的产生. 扩展到250L实现了持续的细胞生长和rAAV生产,克服了以前的挑战.

关键词:
计算流体动力学模型rAAAVAV 在这里.坚固性 坚固性 坚固性扩大规模的升级.剪切压力的压力.转化生产 转化生产

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科学领域:

  • 生物技术和生物加工
  • 基因治疗制造业 基因治疗制造业
  • 细胞和分子生物学 细胞和分子生物学

背景情况:

  • 复合腺相关病毒 (rAAV) 是基因疗法的关键载体.
  • 目前对rAAV的上游开发面临着生产力和一致性方面的挑战.
  • 扩大rAAV生产规模需要仔细管理工艺参数.

研究的目的:

  • 设计和实施一个强大的扩展工艺,以250L规模生产rAAV.
  • 研究和减轻机械切削力对生物反应器rAAV生产的影响.
  • 确定关键的过程属性,以实现一致和高产量的rAAV制造.

主要方法:

  • 在震动瓶中开发工艺,以优化等离子体比率.
  • 计算流体动力学 (CFD) 建模 (M-STAR) 和实证相关性 (Dynochem) 来描述生物反应器的水力动力学.
  • 确定不同生物反应器尺度的每体积单位 (P/V) 最佳功率.
  • 对剪切保护剂 (Poloxamer-188) 和关键属性的评估,如传染前可活细胞密度 (VCD).

主要成果:

  • 起初在摇瓶中的优化改善了rAAV的生产,但扩大到水箱生物反应器显示,由于剪切应力,基因组位数显著下降.
  • CFD建模指导选择最佳的P/V值 (71W/m3在250mL,20W/m3在5-50L和15W/m3在250L) 以尽量减少剪切.
  • 添加Poloxamer-188和控制前传染VCD增强了工艺的稳定性.
  • 最后的250L规模的工艺,包括30%的细胞培养稀释和受控的DNA复合,显示出一致的细胞生长和rAAV生产.

结论:

  • 机械切削应力是限制rAAV生产的关键因素 在生物反应器扩展期间.
  • 基于CFD建模和水力动力学表征的扩展策略使得rAAV的生产能够稳定.
  • 优化的工艺参数,包括切割应力控制和关键属性管理,对于在250L尺度下一致的rAAV生产至关重要.