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相关概念视频

Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...
Bioreactor Design and Operational System01:29

Bioreactor Design and Operational System

Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
Bioreactor Controls-II01:18

Bioreactor Controls-II

In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...
Upstream Processing01:27

Upstream Processing

Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
Vaccine Production01:23

Vaccine Production

Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...

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相关实验视频

Updated: Jul 20, 2026

Production, Purification, and Quality Control for Adeno-associated Virus-based Vectors
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自动化等离子体净化系统可以增加AAV生产.

Hannes Thorell1, Sanne Rönning1, Olivér Daoda2

  • 1KTH Royal Institute of Technology, Dept. of Protein science; Stockholm, SE-106 91, Sweden.

New biotechnology
|March 5, 2026
PubMed
概括

自动化等离子体DNA净化显著减少了腺相关病毒 (AAV) 载体的制造时间. 虽然产量可能会下降,但自动化方法在特定系统中惊人地提高了AAV生产效率.

关键词:
腺相关病毒的病毒.自动化自动化自动化自动化药物开发是药物的发展.基因治疗的基因疗法塑料质粒 塑料质粒是什么?在生产生产生产生产生产生产.净化 净化 净化 净化

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科学领域:

  • 生物技术是生物技术.
  • 基因治疗制造业 基因治疗制造业
  • 分子生物学分子生物学

背景情况:

  • 基因相关病毒 (AAV) 载体对于基因疗法至关重要,但高制造成本阻碍了开发和获取.
  • 等离子体DNA (pDNA) 净化是AAV生产中的一个重要瓶,特别是在更大的规模上.
  • 目前的手动等离子体净化方法耗时且限制了可扩展性.

研究的目的:

  • 为了比较人工与自动化等离子体DNA净化系统在AAV生产中的效率和结果.
  • 评估尺度 (Maxi,Mega,Giga) 对净化时间,产量和内毒素水平的影响.
  • 调查净化方法之间观察到的AAV生产量差异的潜在机制.

主要方法:

  • 使用常规手动套件和可扩展的自动化系统在Maxi,Mega和Giga尺度上的等离子体DNA净化.
  • 通过使用纯化的pDNA对HEK293F细胞进行基于PEI的转染来产生AAV载体.
  • 使用动态光散射分析对AAV9标位,内毒素水平和pDNA复合体形成进行分析.

主要成果:

  • 自动化净化显著减少了处理时间,在更大的规模上节省了更多 (例如,在千兆级节省了8小时).
  • 与手工方法相比,自动化系统的结果通常是较低的产量 (减少3-67%) 和更高的内毒素水平.
  • 令人惊的是,自动化系统净化的等离子体导致AAV-MAX生产量增加了14倍,这是由于自动化系统的化缓冲器形成的较大的pDNA转染复合体.

结论:

  • 自动化等离子体净化为AAV制造提供了相当大的时间节省,特别是在规模上.
  • 净化方法的选择及其相关的化缓冲器可以严重影响转化效率和随后的生物制剂生产.
  • 优化等离子体制备方法,包括化缓冲成分,有可能改善AAV和其他生物制剂的短暂生产.