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相关概念视频

Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

4.4K
Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
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Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

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Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
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Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

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Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
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相关实验视频

Updated: May 27, 2025

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
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A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro

Published on: June 2, 2022

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[对白进行校正的]

Patrick Hofmann1,2, Martin Risch3, Thomas Fehr4,5

  • 1Department of Internal Medicine, Renal Division, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts.

Praxis
|February 18, 2025
PubMed
概括
此摘要是机器生成的。

对总的白蛋白校正可能导致临床实践中的误解. 电离是黄金标准,对于精确的实验室解释,应严格质疑白蛋白校正.

关键词:
低蛋白血症是什么意思与白蛋白纠正的.其他额外的诊断.过高血症的情况.电离是一种.

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Cytosolic Calcium Measurements in Renal Epithelial Cells by Flow Cytometry
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Cytosolic Calcium Measurements in Renal Epithelial Cells by Flow Cytometry

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Monitoring Endoplasmic Reticulum Calcium Homeostasis Using a Gaussia Luciferase SERCaMP
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Monitoring Endoplasmic Reticulum Calcium Homeostasis Using a Gaussia Luciferase SERCaMP

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相关实验视频

Last Updated: May 27, 2025

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
11:30

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro

Published on: June 2, 2022

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Cytosolic Calcium Measurements in Renal Epithelial Cells by Flow Cytometry
10:24

Cytosolic Calcium Measurements in Renal Epithelial Cells by Flow Cytometry

Published on: October 28, 2014

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Monitoring Endoplasmic Reticulum Calcium Homeostasis Using a Gaussia Luciferase SERCaMP
08:41

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科学领域:

  • 临床化学 临床化学
  • 实验室医学 实验室医学
  • 医学诊断 医学诊断 医学诊断

背景情况:

  • 准确解释实验室发现需要了解价值限制.
  • 总的测量作为一个选测试.
  • 电离测量是评估的临床黄金标准.

研究的目的:

  • 批判性地评估对总的白蛋白校正的有用性和潜在的陷.
  • 为了强调电离作为黄金标准的重要性.
  • 为指导有关水平解释的适当临床实践.

主要方法:

  • 关于测量和蛋白校正的现有文献的综述.
  • 对临床场景的分析,其中白蛋白校正可能导致错误.
  • 总与白蛋白校正与电离测量的比较.

主要成果:

  • 蛋白校正配方可以引入对水平的重大误解.
  • 依赖于纠正的总可能会导致不必要的诊断和治疗.
  • 电离水平提供了更准确的生物活性的反映.

结论:

  • 对总的白蛋白校正容易被误解,因此应进行批判性评估.
  • 临床决策应优先考虑在可用和适用的情况下对电离的测量.
  • 了解实验室值的局限性对于有效的患者护理至关重要.