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Related Concept Videos

Analgesia and Pain Management01:25

Analgesia and Pain Management

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...
Opioid Analgesics: Synthetic and Semisynthetic Opioids01:15

Opioid Analgesics: Synthetic and Semisynthetic Opioids

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...
Opioid Analgesics: Morphine and Other Natural Cogeners01:20

Opioid Analgesics: Morphine and Other Natural Cogeners

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...
Nociception01:44

Nociception

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. Thus, pain helps the...
Opioid Receptors: Overview01:22

Opioid Receptors: Overview

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, D-Pen5]-enkephalin or DPDPE for...
Pain01:20

Pain

Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...

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A Modified Inflammatory Pain Model to Study the Analgesic Effect in Mice
06:54

A Modified Inflammatory Pain Model to Study the Analgesic Effect in Mice

Published on: November 15, 2024

Erythrocyte-based analgesic peptides.

Chang Zheng Song1, Qing Wei Wang, Chang Cheng Song

  • 1Erythrocrine Project of Translational Medicine, Shandong Academy of Medical Sciences, Jinan, China. songcz@sina.cn

Regulatory Peptides
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

Mature red blood cells (erythrocytes) generate signaling molecules called erythrocrine peptides from hemoglobin. These peptides influence physiology and pathophysiology, offering potential new pain management strategies.

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Published on: April 11, 2018

Area of Science:

  • Hematology
  • Molecular Biology
  • Physiology

Background:

  • Erythrocytes (red blood cells) primarily transport oxygen via hemoglobin.
  • Emerging evidence suggests erythrocytes also perform signaling functions.
  • The mechanism for producing erythrocyte-derived signaling molecules remains unclear.

Purpose of the Study:

  • To investigate the production mechanism of erythrocyte-based bioactive peptides.
  • To explore the role of the proteasome in generating these signaling molecules.
  • To elucidate the erythrocrine function of erythrocytes.

Main Methods:

  • Analysis of proteasome presence and activity in mature erythrocytes.
  • Identification and characterization of hemoglobin-derived peptides.
  • Investigation of peptide generation through hemoglobin degradation within erythrocytes.

Main Results:

  • Proteasomes and their subunits are present in mature erythrocytes.
  • The intraerythrocytic proteasome facilitates the formation of hemoglobin-derived analgesic peptides.
  • Erythrocrine peptides are generated from hemoglobin degradation and exert systemic effects.

Conclusions:

  • Erythrocytes possess an erythrocrine function, producing and excreting signaling molecules.
  • Hemoglobin-derived analgesic peptides contribute to erythrocyte signaling.
  • Understanding erythrocrine mechanisms may lead to novel therapeutic strategies for pain management.