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相关概念视频

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

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The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
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Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
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相关实验视频

Updated: Jun 12, 2025

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微重力对胰腺小岛的影响

Lukas Zeger1, Povilas Barasa2, Yilin Han1

  • 1Regenerative Neurobiology, Department of Immunology, Genetics and Pathology, Uppsala University, 75108 Uppsala, Sweden.

Cells
|September 27, 2024
PubMed
概括
此摘要是机器生成的。

微重力暴露显著增强胰腺小岛的β细胞增殖,特别是在3D打印结构中,效应可能在延迟后出现. 这一发现为再生医学和糖尿病研究提供了新的途径.

关键词:
通过3D打印打印3D打印.贝塔细胞-贝塔细胞.延迟的效果 延迟的效果糖尿病 糖尿病患者 糖尿病患者微重力中的微重力.神经干细胞的神经干细胞胰腺小岛是什么意思它们的扩散和扩散.

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科学领域:

  • 空间生物学 空间生物学
  • 干细胞生物学 干细胞生物学
  • 再生医学是一种再生医学.

背景情况:

  • 边界帽神经干细胞 (BCs) 促进β细胞增殖,增强胰腺小岛 (PI) 存活率.
  • 在暴露于空间条件后,BCs表现出增加的扩散.
  • 微重力对PI中的β细胞增殖的影响,单独或与BCs一起,仍然需要完全阐明.

研究的目的:

  • 研究微重力对胰腺小岛内β细胞增殖的影响.
  • 为了比较微重力对自由浮动PI的影响,与3D打印的脚手架中的PI相比,有和没有BCs.
  • 评估贝塔细胞在微重力暴露后的延迟效应和长期增殖能力.

主要方法:

  • 在MASER 15探测火箭实验中,胰岛素 (PI) 单独或与边界帽神经干细胞 (BCs) 一起,在6分钟内受到微重力 (μg) 的影响.
  • 细胞以自由浮动和3D打印的格式准备.
  • 扩散标志物EDU在μg暴露之前被使用.
  • 进行了形态评估和扩散分析.

主要成果:

  • 胰腺小岛存活并显著增殖,特别是在自由漂浮的条件下,尽管融合复杂分析.
  • 在μg暴露后两周,在3D打印的小岛上观察到β细胞的增殖,这表明潜在的延迟效应.
  • 3D打印的脚手架防止了小岛的融合,证明在微重力研究中更适合进行形态分析.
  • 胰腺小岛在μg暴露后的几周内保持了增强的增殖能力.

结论:

  • 微重力暴露可以诱导胰腺小岛的β细胞增殖,在3D打印结构中观察到显著的延迟效应.
  • 3D打印的胰腺小岛支架有利于微重力研究,因为它可以防止融合,并允许更清晰的形态分析.
  • 在微重力暴露后,胰腺小岛表现出持续增加的增殖能力,这表明糖尿病治疗中的未来治疗应用的潜力.