Delta Opioid Receptor
Delta Opioid Receptor - Related Videos
01:22
Opioid Receptors: Overview
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2024
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...
01:17
The Delta-to-Delta Circuit
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2024
In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire. The phase currents in a delta-connected load are calculated by dividing the phase voltage by the load impedance per phase: In this...
01:15
Opioid Analgesics: Synthetic and Semisynthetic Opioids
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2024
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...
05:47
Intravital Visualization of Gamma Delta Intraepithelial Lymphocytes
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2025
This video demonstrates the visualization of γδ intraepithelial lymphocytes (IELs) in transgenic mice using confocal microscopy. The surgical procedure involves creating a perforation line and making a longitudinal incision to expose the intestinal mucosa and villi. The transgenic mice express reporter proteins exclusively in γδ IELs, allowing their tracking. Intravital imaging captures the dynamic movement of green fluorescence-labeled γδ IELs along the intestinal epithelial cell's basement...
07:48
Tracking Drug-induced Changes in Receptor Post-internalization Trafficking by Colocalizational Analysis
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Cited by 1 •
2015
Receptor trafficking modulates signaling and cell responsiveness to ligands and is, itself, responsive to cell conditions, including ligand-induced signaling. Here, we describe a powerful and flexible technique for quantitatively assessing drug-induced receptor trafficking using immunolabeling and colocalizational analysis.
FAQs
DOR activation changes neuronal signaling through several linked Gi/o-dependent effects. Coupling to these inhibitory proteins reduces adenylyl cyclase activity, while associated ion-channel modulation limits calcium entry and promotes potassium efflux. Together, these actions lower neuronal excitability and reduce neurotransmitter release, connecting receptor activation to functional changes in neural circuits.
Reducing adenylyl cyclase activity and altering ion channels affect different parts of neuronal signaling. The first changes a signaling enzyme pathway, whereas calcium restriction and potassium efflux directly influence electrical behavior and transmitter release. Considering these effects together helps pharmacologists interpret how DOR activation can suppress neural activity rather than treating one downstream event as the whole response.
Selective agonists and antagonists provide complementary ways to examine DOR function. An agonist tests consequences of receptor activation, whereas an antagonist can help determine whether an observed response depends on DOR signaling. Comparing these ligand classes with broader opioid receptor activation supports evaluation of receptor-selective pharmacology and possible reductions in unwanted effects.
Beyond signaling mechanics, DOR research addresses pain, mood, stress responses, and neuroprotection. These areas show why the receptor matters across pharmacology and neuroscience: its activity can be studied not only as a cellular change in excitability or transmitter release, but also as a possible contributor to broader neural and behavioral functions.
A signaling-focused study could examine adenylyl cyclase activity, calcium entry, potassium efflux, neuronal excitability, and neurotransmitter release after manipulating DOR with agonists or antagonists. Organizing these endpoints from intracellular signaling to neuronal function helps connect receptor-level effects with larger pharmacological questions, including whether responses are selective for DOR.
Selective DOR agonists are valuable in analgesic research because they test whether engaging this receptor can influence pain-related biology without reproducing every consequence of broader opioid receptor activation. Antagonists add a complementary control for receptor involvement. This strategy does not establish a therapy by itself, but it helps assess whether DOR selectivity could support treatment concepts with fewer adverse effects.