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相关概念视频

Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Orders of Magnitude01:15

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The order of magnitude of a number is the power of 10 that most closely approximates it. Thus, the order of magnitude estimates the scale (or size) of its value. To find the order of magnitude of a number, take the base-10 logarithm of the number and round it to the nearest integer. Then the order of magnitude of the number is simply the resulting power of 10.
The order of magnitude is simply a way of rounding numbers consistently to the nearest power of 10. This makes doing rough mental math...
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DNA-only Transposons02:57

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DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
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Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
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相关实验视频

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Isolation and Culture Expansion of Tumor-specific Endothelial Cells
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将DNA-LNP向内皮细胞提高表达幅度,持续时间和特异性

Nicolas Marzolini1, Taylor V Brysgel2, Ryan J Rahman3

  • 1Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
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概括

向的DNA-脂质纳米颗粒 (DNA-LNP) 显示了改善的器官特异性,用于基因传递. 这一进步为内皮中心疾病提供了一个有前途的治疗平台.

关键词:
它们是DNA DNA DNA DNA.药物输送系统是药物输送系统.药物向的目标是药物.它们的内皮质 (endothelium).纳米颗粒是一种纳米粒子.

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科学领域:

  • 生物技术是生物技术.
  • 纳米医学是一种纳米医学.
  • 基因治疗 基因治疗

背景情况:

  • DNA-脂质纳米颗粒 (DNA-LNP) 在体内DNA输送中是有效的.
  • 针对特定的器官可以提高治疗效果,减少副作用.
  • 目前的方法缺乏精确控制DNA-LNP生物分布.

研究的目的:

  • 开发额外肝脏DNA-LNP向策略.
  • 为了增强器官和细胞类型特定的转基因表达.
  • 建立针对内皮细胞中心疾病的治疗平台.

主要方法:

  • 结合DNA-LNP与针对PECAM-1 (肺) 和VCAM-1 (大脑/) 的抗体.
  • 评估目标器官中的转基因表达与非目标LNP相比.
  • 使用Fab片段来提高准特异性.
  • 进行单细胞分析以了解表达机制.

主要成果:

  • 针对PECAM-1和VCAM-1的DNA-LNP在目标器官中实现了强大的,持久的转基因表达.
  • 随着时间的推移,肺特异性表达增加,显示出比以前的mRNA-LNP更高的肺-肝比率.
  • 用Fab片段替换抗体进一步提高了器官的特异性.
  • 目标器官中的内皮细胞是持续表达的关键,与非目标肝细胞不同.

结论:

  • 向的DNA-LNP能够精确地传递特定器官和细胞类型的基因.
  • 这项技术为许多内皮相关疾病提供了潜在的治疗策略.
  • 这些发现为基因治疗中先进的纳米医学应用铺平了道路.