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相关概念视频

Analgesia and Pain Management01:25

Analgesia and Pain Management

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Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Opioid Receptors: Overview01:22

Opioid Receptors: Overview

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Opioid receptors, including the mu (μ, MOR), delta (δ, DOR), and kappa (κ, KOR) types, belong to the rhodopsin family of G protein-coupled receptors. These receptors are located throughout the central and peripheral nervous systems and in non-neuronal tissues such as macrophages and astrocytes. Opioid receptor ligands can be categorized into agonists or antagonists. Highly selective agonists include [d-Ala2, MePhe4, Gly(ol)5]-enkephalin or DAMGO for MOR, [D-Pen2,...
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Opioid Analgesics: Synthetic and Semisynthetic Opioids01:15

Opioid Analgesics: Synthetic and Semisynthetic Opioids

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Synthetic and semisynthetic opioids are pivotal in pain management and tackling opioid addiction. Semisynthetic opioids, including morphinans (morphine derivatives), oxycodone, oxymorphone, hydrocodone, and hydromorphone, have improved pharmacokinetic profiles compared to morphine. Additionally, heroin and 6-MAM (6-Monoacetylmorphine) show better CNS penetration than morphine due to heightened lipid solubility. Hydromorphone, a potent opioid, undergoes hepatic metabolism to form the active...
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Opioid Analgesics: Morphine and Other Natural Cogeners01:20

Opioid Analgesics: Morphine and Other Natural Cogeners

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Opioids are a class of drugs that mimic endogenous opioid peptides and act on opioid receptors, and help in pain relief. These compounds are classified as natural, synthetic, or semi-synthetic. Natural opioids, like morphine, codeine, and thebaine, are derived from the opium poppy plant (Papaver somniferum or Papaver album) and are termed opiates. Synthetic opioids are artificial, while semi-synthetic opioids combine natural and synthetic compounds. Morphine, a prototypical opioid, possesses a...
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Nociception01:44

Nociception

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Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain.
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吗啡诱导的过敏症会影响小细胞外囊 miRNA 的组成和功能.

Deepa Reddy1,2, Zhucheng Lin1,2, Sujay Ramanathan1,2

  • 1Department of Pharmacology & Physiology, Drexel University College of Medicine, 245 North 15th Street, Philadelphia, PA, USA.

bioRxiv : the preprint server for biology
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PubMed
概括

吗啡治疗改变了小细胞外囊泡 (sEV) 中的微RNA,可能提供一种新的非阿片类药物疼痛疗法. 这些sEV可能有助于解决炎症过敏症.

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科学领域:

  • 神经科学是一个神经科学.
  • 分子生物学分子生物学
  • 药理学 药理学是指药理学的学科.

背景情况:

  • 像吗啡这样的阿片类止痛药是常见的疼痛治疗方法.
  • 长期使用阿片类药物可以矛盾地增加疼痛敏感性 (阿片类药物诱导的过敏症).
  • 驱动阿片类药物诱导的过敏症的分子机制仍然不完全理解.

研究的目的:

  • 在施用吗啡后,研究血清衍生小细胞外囊泡 (sEVs) 的分子变化.
  • 在sEV中识别特定的微RNAs (miRNAs),这些微RNAs被吗啡失调.
  • 评估吗啡改性SEVs在疼痛管理中的治疗潜力.

主要方法:

  • 小鼠接受了吗啡来诱导过敏症.
  • 分离了血清sEV,并分析了它们的miRNA组成.
  • 生物信息分析预测了参与疼痛途径的miRNA目标.
  • 通过实验证实了特定miRNAs对mRNA的调节.
  • 先前没有试验过的小鼠接受了sEVs以评估行为影响.

主要成果:

  • 吗啡治疗显著改变了血清SEV中的18个miRNAs的表达.
  • 预计几种失调的miRNA将准CREB (循环AMP反应元素结合蛋白).
  • 证实miR-155和miR-10a可以结合和抑制CrebmRNA.
  • 接受过吗啡治疗的小鼠的sEV加速了先前接受者的炎症过敏症的解决.
  • 没有观察到对基础疼痛值,位置偏好或运动器官敏感性的显著影响.

结论:

  • 吗啡会改变血清sEVmiRNA的特征,包括那些针对CREB的特征.
  • 来自用吗啡治疗的小鼠的血清sEV具有减轻炎症疼痛过敏性的能力.
  • sEVs代表了一个有希望的非阿片类药物治疗策略来治疗疼痛.