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Pharmacological Receptor Mechanisms and Effects
Research Guide
What is Pharmacological Receptor Mechanisms and Effects?
Pharmacological Receptor Mechanisms and Effects is the study of how drugs interact with specific cellular receptors to modulate signaling pathways, including synaptic neurotransmitter release, calcium signaling, and cellular responses in the nervous system.
This field encompasses 22,350 published works focused on receptor-ligand interactions across various drug classes. Key areas include opiate receptors, excitatory amino acid receptors, and purinergic receptors, with foundational studies demonstrating receptor binding and functional effects. Research highlights mechanisms such as increased synaptic dopamine by abused drugs and high-affinity binding of antagonists like naloxone to opiate receptors.
Topic Hierarchy
Research Sub-Topics
Sigma-1 Receptor Chaperone Function
This sub-topic examines the Sigma-1 receptor's role as an endoplasmic reticulum chaperone at the MAM interface, regulating protein folding and quality control. Researchers study ligand-induced conformational changes and stress response modulation.
Sigma-1 Receptor in Calcium Signaling
This sub-topic investigates Sigma-1 receptor modulation of IP3 receptor activity and calcium efflux from ER stores. Researchers explore biophysical interactions and downstream effects on mitochondrial bioenergetics.
Neuroprotective Effects of Sigma-1 Agonists
This sub-topic covers Sigma-1 activation in models of stroke, ALS, and Alzheimer's, promoting cell survival via BDNF and autophagy. Researchers test agonists like PRE-084 in preclinical neuroprotection paradigms.
Sigma-1 Receptor in Neuropsychiatric Disorders
This sub-topic explores Sigma-1 roles in depression, anxiety, and addiction through monoamine modulation and neuroplasticity. Researchers correlate receptor polymorphisms with antidepressant responses.
Sigma-1 Receptor in Cancer Therapy
This sub-topic assesses Sigma-1 overexpression in tumors and antagonist-induced apoptosis or radiosensitization. Researchers develop selective ligands for imaging and targeted chemotherapy delivery.
Why It Matters
Pharmacological receptor mechanisms underpin drug development for pain management, addiction treatment, and neuroprotection. Pert and Snyder (1973) demonstrated opiate receptors in nervous tissue using tritiated naloxone, enabling targeted opioid therapies that parallel pharmacological potency. Di Chiara and Impérato (1988) showed that drugs abused by humans, such as cocaine and amphetamines, preferentially elevate synaptic dopamine in the mesolimbic nucleus accumbens by 500-2000%, informing addiction pharmacotherapies. Monaghan et al. (1989) classified excitatory amino acid receptors into NMDA, kainate, and AMPA types, advancing anticonvulsant drugs like MK-801, which Wong et al. (1986) identified as a potent NMDA antagonist with Kd=37.2 nM affinity. These findings support treatments for neuropsychiatric disorders, cancer therapy, and COVID-19, as in Sanders et al. (2020) pharmacologic review.
Reading Guide
Where to Start
"Opiate Receptor: Demonstration in Nervous Tissue" by Pert and Snyder (1973), as it provides the foundational evidence of specific opiate receptor binding using tritiated naloxone, essential for understanding receptor demonstration techniques.
Key Papers Explained
Pert and Snyder (1973) "Opiate Receptor: Demonstration in Nervous Tissue" established opiate receptor existence via specific naloxone binding, which Martin et al. (1976) "The effects of morphine- and nalorphine- like drugs in the nondependent and morphine-dependent chronic spinal dog" built upon by examining morphine effects in dependent models. Di Chiara and Impérato (1988) "Drugs abused by humans preferentially increase synaptic dopamine concentrations in the mesolimbic system of freely moving rats" extended this to dopamine modulation by abused drugs. Monaghan et al. (1989) "The Excitatory Amino Acid Receptors: Their Classes, Pharmacology, and Distinct Properties in the Function of the Central Nervous System" classified amino acid receptors, linking to Wong et al. (1986) "The anticonvulsant MK-801 is a potent N-methyl-D-aspartate antagonist" NMDA antagonism findings.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Current frontiers emphasize sigma-1 receptor roles in cellular signaling and neuroprotection, as per the topic cluster description, though no recent preprints or news are available. Focus shifts to therapeutic applications in neuropsychiatric disorders and cancer, building on receptor mechanisms in top-cited works.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Drugs abused by humans preferentially increase synaptic dopami... | 1988 | Proceedings of the Nat... | 4.7K | ✓ |
| 2 | Receptors for Purines and Pyrimidines | 2012 | — | 4.0K | ✕ |
| 3 | The effects of morphine- and nalorphine- like drugs in the non... | 1976 | Journal of Pharmacolog... | 3.0K | ✕ |
| 4 | Pharmacologic Treatments for Coronavirus Disease 2019 (COVID-19) | 2020 | JAMA | 2.4K | ✕ |
| 5 | Opiate Receptor: Demonstration in Nervous Tissue | 1973 | Science | 2.4K | ✕ |
| 6 | The Excitatory Amino Acid Receptors: Their Classes, Pharmacolo... | 1989 | The Annual Review of P... | 2.2K | ✕ |
| 7 | 2-Arachidonoylgylcerol: A Possible Endogenous Cannabinoid Rece... | 1995 | Biochemical and Biophy... | 2.2K | ✕ |
| 8 | Intrathecal morphine in mice: A new technique | 1980 | European Journal of Ph... | 1.9K | ✕ |
| 9 | Isolation and structure of the endogenous agonist of opioid re... | 1995 | Nature | 1.9K | ✓ |
| 10 | The anticonvulsant MK-801 is a potent N-methyl-D-aspartate ant... | 1986 | Proceedings of the Nat... | 1.8K | ✓ |
Frequently Asked Questions
What are opiate receptors?
Opiate receptors are specific binding sites in mammalian brain and guinea pig intestine identified by tritiated naloxone, a powerful opiate antagonist. Pert and Snyder (1973) showed competition by opiates and antagonists mirrors their pharmacological potency. These receptors are confined to nervous tissue and mediate drug effects on pain and dependence.
How do abused drugs affect synaptic dopamine?
Drugs abused by humans like cocaine and amphetamines increase extracellular dopamine in the nucleus accumbens but not the dorsal caudate. Di Chiara and Impérato (1988) measured this via brain dialysis in freely moving rats. The effect correlates with abuse potential.
What classes of excitatory amino acid receptors exist?
Excitatory amino acid receptors divide into NMDA, kainate, quisqualate (AMPA), and metabotropic classes. Monaghan et al. (1989) detailed their pharmacology and distinct CNS roles. These mediate synaptic transmission and are targets for anticonvulsants.
What is the binding affinity of MK-801 to NMDA receptors?
MK-801 binds with high affinity (Kd = 37.2 ± 2.7 nM) to sites in rat brain corresponding to the MK-801 recognition site within the ion channel of the NMDA receptor. Wong et al. (1986) identified this via [3H]MK-801 autoradiography. It acts as a potent anticonvulsant.
What are purine and pyrimidine receptors?
Receptors for purines and pyrimidines include P1 (adenosine) and P2 (ATP/UTP) types, subdivided into subtypes. Burnstock and Verkhratsky (2012) reviewed their signaling roles. They regulate cellular functions in the nervous system.
How was the endogenous agonist of the ORL1 receptor isolated?
The endogenous agonist of the opioid receptor-like ORL1 receptor was isolated from porcine brain extracts. Meunier et al. (1995) determined its structure as a 17-amino acid peptide named nociceptin. It binds specifically to ORL1 with high affinity.
Open Research Questions
- ? How do sigma-1 receptor chaperones at the ER-mitochondrion interface precisely regulate calcium signaling in neuroprotection?
- ? What structural dynamics underlie sigma-1 receptor modulation of cell survival pathways in cancer therapy?
- ? Which ligand-receptor interactions at sigma-1 sites best mitigate neuropsychiatric disorder progression?
- ? How do sigma-1 receptors integrate antidepressant effects with neurodegenerative disease mechanisms?
- ? What are the therapeutic limits of sigma-1 receptor targeting in balancing neuroprotection and addiction risk?
Recent Trends
The field maintains 22,350 works with no specified 5-year growth rate.
No recent preprints or news coverage in the last 6-12 months indicate steady incorporation of classic papers like Di Chiara and Impérato into ongoing sigma-1 receptor studies on neuroprotection and calcium signaling.
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