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Coronary Circulation01:21

Coronary Circulation

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The heart, an organ critical to survival, gets nourishment not from the blood it pumps but from a separate circulation system known as coronary circulation. This is the shortest circulation in the body and is responsible for supplying the heart with the nutrients it needs to function effectively.
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Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
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Resistivity01:22

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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
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Insulin: The Receptor and Signaling Pathways01:28

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Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but...
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Insulin Formulations: Types and Delivery01:27

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Insulin preparations are categorized by their duration of action into short-acting and long-acting types. Two strategies are used to modify insulin's absorption and pharmacokinetic profile: slowing the absorption post-subcutaneous injection, or altering human insulin's amino acid sequence or protein structure. These changes retain the insulin's ability to bind to the insulin receptor, but alter its behavior in solution or after injection.
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胰岛素抵抗和冠状动脉微血管功能障碍:一个复杂的相互作用.

Martina Magistri1,2, Leonardo Portolan1, Aurora Trevisanello1

  • 1Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy.

Cardiovascular diabetology
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此摘要是机器生成的。

胰岛素耐药性 (IR) 与胸痛无动脉阻塞 (INOCA) 通过冠状动脉微血管功能障碍和血管有关. 了解这种联系可能会揭示IR患者心脏病的新疗法.

关键词:
冠状动脉动脉扫描是一项冠状动脉动脉扫描.冠状动脉的流量储备.冠状动脉微血管功能障碍 冠状动脉微血管功能障碍冠状动脉血管是因为超胰岛素性-高血糖性紧试验微循环阻力指数 微循环阻力指数胰岛素耐药性 胰岛素耐药性是一种

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科学领域:

  • 心脏病学 心脏病学
  • 内分泌学 在内分泌学.
  • 病理生理学 病理生理学

背景情况:

  • 缺血症和非阻塞性冠状动脉疾病 (INOCA) 影响高达40-60%的心痛患者.
  • 冠状动脉微血管功能障碍 (CMD) 和冠状动脉是INOCA的关键机制.
  • 胰岛素抵抗 (IR) 是一个重要的心血管风险因素,在2型糖尿病 (T2DM) 之前,并导致内皮功能障碍和炎症.

研究的目的:

  • 审查将胰岛素抵抗 (IR) 与冠状动脉微血管功能障碍 (CMD) 和冠状动脉血管相关的证据.
  • 在IR的背景下,探索INOCA的病理生理机制和诊断方法.
  • 确定未来的研究方向,以了解与IR相关的INOCA内型.

主要方法:

  • 关于研究IR,CMD和冠状动脉血管之间的关系的文献综述.
  • 对病理生理路径的当前证据的综合.
  • 对INOCA的诊断策略的分析.

主要成果:

  • 红外线有助于内皮功能障碍和炎症,这是CMD和血管运动功能障碍中的关键过程.
  • 超胰岛素血症,失糖症和氧化压力都与IR和INOCA之间的复杂关系有关.
  • 将IR与不同的INOCA内型联系起来的精确分子机制需要进一步阐明.

结论:

  • IR是INOCA发展的关键因素,影响CMD和冠状动脉血管.
  • 向IR可能为改善INOCA患者的微血管功能和减少症状提供治疗策略.
  • 需要进一步的研究,以充分定义分子途径,并开发针对IR相关INOCA的向疗法.