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相关概念视频

Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

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Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
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Drugs Acting on Autonomic Ganglia: Blockers01:28

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Ganglionic blockers inhibit autonomic activity by blocking nicotinic receptors in the autonomic ganglia, suppressing impulse transmission. These blockers lack selectivity between sympathetic and parasympathetic ganglia and are ineffective as neuromuscular junction antagonists. They can be categorized into two groups:
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Adrenergic Receptors: ɑ Subtype01:31

Adrenergic Receptors: ɑ Subtype

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Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase...
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Antihypertensive Drugs: Action of Calcium Channel Blockers01:18

Antihypertensive Drugs: Action of Calcium Channel Blockers

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Calcium ions are essential to contract smooth muscle cells in blood vessels. They enter these cells through voltage-dependent calcium channels, specifically L-type calcium channels in the cell membrane. These L-type calcium channels are integral to the excitation-contraction coupling process in smooth muscle. When a stimulus is received by smooth muscle cells, their membrane depolarizes. This alteration in membrane potential instigates the opening of L-type calcium channels. As a result,...
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G-Protein Gated Ion Channels01:21

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
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Angina pectoris, a primary symptom of ischemic heart disease, requires careful pharmacological interventions. In this context, calcium channel blockers (CCBs) and ranolazine have emerged as crucial pharmacotherapeutic agents, providing deep insights into the complexities of angina management.
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Ex Vivo Release of Calcitonin Gene-Related Peptide from the Trigeminovascular System in Rodents
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阻止CGRP受体:人类血管床之间的差异

Tessa de Vries1, Deirdre M Boucherie1, Antoon van den Bogaerdt2

  • 1Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus MC University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands.

Pharmaceuticals (Basel, Switzerland)
|August 26, 2023
PubMed
概括

扎维杰邦 (Zavegepant) 是一种小分子素基因相关 (CGRP) 受体对手,在人类冠状动脉和中脑膜动脉中表现出类似的效果. 这一发现对于评估新型偏头痛治疗的心血管安全性至关重要.

关键词:
这是CGRP的CGRP.标牌情节图片 标牌情节图片反对主义的对立.子是子的一种类型.偏头痛 偏头痛 偏头痛 偏头痛强度强度强度是什么意思血管扩张 血管扩张

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相关实验视频

Last Updated: Jul 18, 2025

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Detection and Quantification of Calcitonin Gene-Related Peptide CGRP in Human Plasma Using a Modified Enzyme-Linked Immunosorbent Assay
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科学领域:

  • 药理学 药理学是指药理学的学科.
  • 心血管研究研究心血管研究
  • 神经科学是一个神经科学.

背景情况:

  • 偏头痛治疗越来越多地准素基因相关 (CGRP) 途径.
  • 了解CGRP受体对抗剂对心血管组织的影响对于药物安全至关重要.

研究的目的:

  • 为了研究zavegepant对CGRP诱导的人类冠状动脉 (HCAs) 放松的影响.
  • 为了比较几个CGRP受体对抗剂的效力,包括zavegepant,在HCA和人类中脑膜动脉 (HMMA) 中.

主要方法:

  • 隔离的人类冠状动脉被用来评估CGRP诱导的放松在zavegepant的存在.
  • 使用甲状腺图谱分析来确定zavegepant的强度 (pA2值) 和作用机制.
  • 以往对HCA和HMMA中其他抗剂 (atogepant,olcegepant,rimegepant,telcagepant,obrogepant) 的研究数据与zavegepant的影响进行了比较.

主要成果:

  • 在HCA中,Zavegepant的pA2值为9.92±0.24,Schild图形的斜率与单位没有显著差异.
  • 扎维杰潘特在HCAs和HMMA中表现出类似的功效.
  • 盾牌斜率<1的对手在HMMA中更强大,而斜率接近统一的对手 (如zavegepant) 在两种动脉类型中都表现出一致的强度.

结论:

  • 扎维杰潘特作为一种CGRP受体对手,在冠状动脉和脑膜动脉中具有一致的强度.
  • 施尔德图形斜率<1表明多个受体在HCAs中CGRP介导的放松中可能参与.
  • 建议进一步研究HCA的CGRP受体药理学,以提高未来偏头痛治疗药物的心血管安全性.