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Related Concept Videos

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 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: 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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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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Drug-Receptor Interaction: Agonist01:25

Drug-Receptor Interaction: Agonist

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Agonists are drugs that interact with specific receptors in the body to produce a biological response. When an agonist binds to a receptor, it activates or enhances the receptor's function, leading to physiological effects. The interaction between agonist drugs and receptors is crucial for their therapeutic action in various medical treatments.
Agonists can bind to receptors in different ways. Some agonists bind directly to the receptor's active site, mimicking the endogenous...
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Adrenergic Agonists: Chemistry and Structure-Activity Relationship01:16

Adrenergic Agonists: Chemistry and Structure-Activity Relationship

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Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
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Buprenorphine: The Opioid that Cried 'Partial Agonist'.

Jeffrey J Bettinger, Jacqueline Cleary

    Journal of Opioid Management
    |September 25, 2024
    PubMed
    Summary

    Buprenorphine, a unique opioid, may offer potent pain relief without a ceiling effect, contrary to common misconceptions. Evolving research reveals its complex actions, supporting its role in managing chronic pain.

    Area of Science:

    • Pharmacology
    • Neuroscience
    • Pain Management

    Background:

    • Buprenorphine use is increasing, yet misconceptions persist regarding its utility in chronic non-cancer pain.
    • A common misnomer suggests its partial agonist activity limits both side effects and analgesic potential.
    • Novel molecular mechanisms challenge the notion of a ceiling effect on buprenorphine's pain-relieving capabilities.

    Purpose of the Study:

    • To review evolving research on buprenorphine's complex pharmacologic effects.
    • To clarify buprenorphine's actions on opioid receptors and intracellular pathways.
    • To support buprenorphine's role in pain management using clinical trial data.

    Main Methods:

    • Review of molecular and cellular mechanisms of buprenorphine.

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  • Analysis of buprenorphine's interactions with mu-opioid receptors and G-protein subunits.
  • Examination of beta-arrestin recruitment and splice variant binding.
  • Assessment of spinal versus supraspinal activity.
  • Review of human clinical trial data.

    • Main Results:

    • Buprenorphine exhibits complex interactions with various opioid receptors and signaling pathways.
    • Evidence suggests its analgesic potential may not be limited by a ceiling effect.
    • Clinical data supports buprenorphine's efficacy in pain management.

    Conclusions:

    • Buprenorphine's unique pharmacology warrants a re-evaluation of its role in pain management.
    • Further research into its molecular actions supports its clinical utility.
    • Buprenorphine shows promise as a valuable option on the analgesic ladder for chronic pain.