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相关概念视频

Elastin is Responsible for Tissue Elasticity01:12

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Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...
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Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
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一种类似于弹性质的蛋白质用于可注射的类似组织的网络.

Yi Yao1,2, Yueyue Kong1,2, You Long1

  • 1Department of Biochemical Engineering, School of Chemical Engineering and Technology, Frontier Science Center for Synthetic Biology (MOE), Tianjin University, Tianjin 300350, China.

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概括

研究人员开发了一种基于蛋白质的新型填充剂,用于脂肪组织再生. 这种可注射的水凝显示出改善的稳定性和降低的免疫反应,有助于医学再生.

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科学领域:

  • 生物材料科学 生物材料科学
  • 再生医学是一种再生医学.
  • 蛋白质工程是指蛋白质工程.

背景情况:

  • 基于蛋白质的填充剂为脂肪再生提供生物相容性.
  • 弹性钢的结构启发了仿生材料.
  • 目前的填充剂可能面临免疫性和稳定性挑战.

研究的目的:

  • 设计一种低免疫性,可注射的基于蛋白质的填充剂,用于脂肪组织再生.
  • 为了创建一个可调节的,生物相容的水凝模仿本地组织特性.
  • 评估新型填充剂的体内性能和免疫性.

主要方法:

  • 设计了一种"多域集体弹性类似" (MDCE) 蛋白质,其中包含了弹性类似,聚氨酸和zwitterionic多.
  • 制定了一种可注射的水凝,具有in situ凝和防腐性质.
  • 在水凝中评估脂肪干细胞的活力,并在老鼠脂肪组织缺陷模型中评估体内表现.

主要成果:

  • MDCE水凝在体内形成了一个模量调节的填充剂,没有化学交叉链接器.
  • 封装的脂肪干细胞保持高活性 (>80%的存活率) 至少9天.
  • 在3个月的时间里,MDCE水凝表现出优越的稳定性和较低的免疫性,与来自牛的弹性相比.

结论:

  • 设计的MDCE蛋白可以创建可注射,生物相容和低免疫性组织填充剂.
  • 这种新型的水凝有效填补脂肪组织缺陷,并支持细胞活力.
  • 这些发现支持使用MDCE水凝进行医学再生,包括面部复发.