相关实验视频
Updated: Jun 13, 2026

08:42
Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
Published on: July 3, 2020
溶解体病理和骨质疏松症在失去H+驱动的溶解体Cl-积累后发生
Stefanie Weinert1, Sabrina Jabs, Chayarop Supanchart
1Leibniz-Institut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany.
概括
化物通道ClC-7 化物通道ClC-7
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 溶酶体酸化对于细胞废物降解至关重要.
- 化通道,特别是ClC-7,涉及到 lysosomal 功能.
- 关于ClC-7的确切作用,无论是Cl-导电性还是Cl-/H+交换,仍在争论中.
研究的目的:
- 研究ClC-7在溶酶体酸化和相关细胞过程中的功能.
- 要区分ClC-7.的Cl-导电性和Cl-/H+交换作用.
- 阐明与ClC-7功能障碍相关的溶酶体储存疾病的分子机制.
主要方法:
- 产生了具有点突变使ClC-7成为Cl-导体的Clcn7(unc/unc) 鼠标.
- 在突变小鼠中分析 lysosomal pH,含量和相关表型.
- 与Clcn7(-/-) 和野生类型的 littermates 的Clcn7(unc/unc) 小鼠的比较.
主要成果:
- Clcn7(unc/unc) 小鼠表现出溶酶体储存疾病,类似于Clcn7(-/-) 小鼠,尽管溶酶体pH和导电性正常.
- 骨质疏松症是较轻的,和外套颜色缺陷不在Clcn7(unc/unc) 的小鼠与Clcn7(-/-) 的小鼠相比.
- Clcn7(-/-) 和Clcn7(unc/unc) 两种小鼠都显示出 lysosomal 化物积累的减少,这表明它发挥了关键作用.
结论:
- 单独的Cl-导电性不能完全挽救ClC-7的功能,这表明Cl-/H+交换的特定作用.
- 降低的 lysosomal 化物水平可能是 ClC-7 缺陷或功能障碍模型中观察到的表型的主要驱动因素.
- 无合的ClC-7的行为可能是有害的,强调了其受监管的运输活动的重要性.
相关概念视频
Lysosomal Hydrolases
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
Delivery Pathways to the Lysosome
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Lysosomes
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
Lysosomes
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
Export of Misfolded Proteins out of the ER
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...
The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
