相关实验视频
Updated: May 9, 2025

10:36
Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
13.8K
响应反的细胞工厂用于动态调节未折叠的蛋白质响应
Daniela Barrios1, Bhagyashree Bachhav2, Wendolyn Carlos-Alcalde3
1Department of Bioengineering, Rice University, Houston, TX, USA.
Nature communications
|May 2, 2025
概括
工程细胞工厂可以动态调整未折叠的蛋白质反应 (UPR),以减少蛋白质毒性压力,改善治疗性蛋白质的生产. 这种反响应系统提高了细胞活力和生物制剂的制造产量.
科学领域:
- 生物技术是生物技术.
- 细胞工程 细胞工程
- 生物制药制造业 生物制药制造业
背景情况:
- 治疗性蛋白质的过度表达会导致蛋白质毒性压力,激活未折叠蛋白质反应 (UPR) 并导致细胞死亡,限制生物制造.
- 目前通过调节UPR来增强蛋白质生产的策略提供有限的,蛋白质特定的改善,并可能导致毒性.
- 细胞群的异质性和适应性进一步复杂化了优化治疗蛋白质产量的努力.
研究的目的:
- 设计能够感知和动态调节UPR的反响应细胞工厂,以应对蛋白质毒性压力.
- 克服当前策略的局限性,通过开发一个减轻压力和延迟亡的系统来克服这些局限性.
- 增强治疗性蛋白质的产生,包括组织等离子素激活剂和blinatumomab.
主要方法:
- 开发具有集成感应系统的细胞工厂,以监测和调节蛋白质毒性压力.
- 动态调节未折叠蛋白反应 (UPR) 途径,以应对细胞压力.
- 在工程细胞中评估增强治疗性蛋白质的产生,包括组织等离子素激活剂和blinatumomab.
主要成果:
- 工程细胞工厂在感知蛋白质毒性压力时展示了UPR的动态调制.
- 反响应系统有效地减轻了细胞应激,并延迟了细胞亡.
- 实现了治疗性蛋白质的显著增强,例如组织等离子素激活剂和布利纳马布.
结论:
- 响应反的细胞工厂为动态管理细胞应激反应提供了一种创新的方法.
- 这一策略通过提高细胞活力和生产率来增强治疗性蛋白质制造.
- 开发的系统提供了一种通过自适应性UPR调制优化生物制造工艺的新方法.
相关概念视频
The Unfolded Protein Response
4.3K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
4.3K
Regulation of the Unfolded Protein Response
2.3K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.3K
Protein Folding Quality Check in the RER
3.6K
ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...
3.6K
Export of Misfolded Proteins out of the ER
3.3K
After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
3.3K
Regulated Protein Degradation
7.1K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
7.1K
Protein Modifications in the RER
4.8K
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
4.8K

