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相关概念视频

Regulation of Heart Rates01:31

Regulation of Heart Rates

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The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
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Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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Regulation of the Unfolded Protein Response01:31

Regulation of the Unfolded Protein Response

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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...
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Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

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The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
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Role of ER in the Secretory Pathway01:17

Role of ER in the Secretory Pathway

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Eukaryotic cells have a special pathway that enables communication between various intracellular membrane-bound compartments and also with the extracellular environment. This pathway is termed as the secretory pathway.
Components of the secretory pathway
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相关实验视频

Updated: Jul 26, 2025

Study of Endoplasmic Reticulum and Mitochondria Interactions by In Situ Proximity Ligation Assay in Fixed Cells
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Study of Endoplasmic Reticulum and Mitochondria Interactions by In Situ Proximity Ligation Assay in Fixed Cells

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LonP1链接线粒体-ER相互作用调节心脏功能

Yujie Li1,2,3, Dawei Huang2, Lianqun Jia4

  • 1The Affiliated Nanhua Hospital and School of Basic Medical Sciences, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.

Research (Washington, D.C.)
|June 19, 2023
PubMed
概括
此摘要是机器生成的。

线粒体Lon蛋白酶 (LonP1) 被确定为关键蛋白质,将线粒体和内分泌网连接起来. 缺少它会破坏这种联系,导致心脏功能障碍和潜在的治疗心力衰竭的目标.

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Visualization and Quantification of Endogenous Intra-Organelle Protein Interactions at ER-Mitochondria Contact Sites by Proximity Ligation Assays
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Visualization and Quantification of Endogenous Intra-Organelle Protein Interactions at ER-Mitochondria Contact Sites by Proximity Ligation Assays

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Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes
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Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes

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相关实验视频

Last Updated: Jul 26, 2025

Study of Endoplasmic Reticulum and Mitochondria Interactions by In Situ Proximity Ligation Assay in Fixed Cells
09:34

Study of Endoplasmic Reticulum and Mitochondria Interactions by In Situ Proximity Ligation Assay in Fixed Cells

Published on: December 10, 2016

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Visualization and Quantification of Endogenous Intra-Organelle Protein Interactions at ER-Mitochondria Contact Sites by Proximity Ligation Assays
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Visualization and Quantification of Endogenous Intra-Organelle Protein Interactions at ER-Mitochondria Contact Sites by Proximity Ligation Assays

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Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes
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Dual-color Correlative Light and Electron Microscopy for the Visualization of Interactions between Mitochondria and Lysosomes

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科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 心血管研究研究心血管研究

背景情况:

  • 器官间接触,特别是线粒体-内质网膜 (ER) 膜接触点 (MAMs),对于细胞平衡至关重要.
  • MAMs调节重要的细胞过程,包括离子/脂质转移,信号传递和器官动态.
  • 管理MAM形成和功能的机制仍然不完全理解.

研究的目的:

  • 在MAM中识别参与绑定线粒体和ER的新型蛋白质.
  • 阐明线粒体Lon蛋白酶 (LonP1) 在MAM形成和心脏功能中的作用.

主要方法:

  • 识别LonP1作为一个MAM局部化的蛋白质.
  • 研究LonP1枯竭对MAM完整性和细胞培养中的线粒体动态的影响.
  • 在小鼠模型中分析心脏特异性的LonP1缺陷.

主要成果:

  • LonP1被确定为一种新的MAM结合蛋白.
  • 移除LonP1显著减少了MAM的形成,并诱导了线粒体的分裂.
  • 心脏特异性的LonP1缺陷损害了MAM完整性,线粒体融合,并激活了ER (UPRER) 中的展开蛋白质反应.
  • 伦P1缺乏导致异常的心脏代谢重编程和病理重塑.

结论:

  • LonP1是一种关键的MAM局部蛋白质,调节MAM完整性和线粒体动力学.
  • 伦P1通过影响线粒体功能和ER压力,在维持心脏平衡中发挥重要作用.
  • LonP1代表了治疗心力衰竭治疗的潜在治疗标.