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Updated: Jul 7, 2026
07:23
Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
Published on: July 29, 2014
Complementary modulation of somatic inhibition by opioids and cannabinoids
Lindsey L Glickfeld1, Bassam V Atallah, Massimo Scanziani
1Neurosciences Graduate Program, Neurobiology Section, University of California, San Diego, La Jolla, California 92093-0634, USA.
Summary
Opioids and cannabinoids selectively modulate distinct hippocampal basket cell populations, fine-tuning neuronal activity timing. This neuromodulator sensitivity controls specific epochs of inhibition, impacting temporal patterns in the hippocampus.
Area of Science:
- Neuroscience
- Cellular Neuroscience
- Neuropharmacology
Background:
- Somatic inhibition in principal cells is mediated by distinct GABAergic basket cell classes.
- Two basket cell types in the hippocampus target CA1 pyramidal cells but exhibit differential activity timing.
- Cannabinoids are known to selectively suppress one basket cell class, but opioid effects remain unclear.
Purpose of the Study:
- To investigate whether opioids, like cannabinoids, selectively modulate somatic inhibition mediated by hippocampal basket cells.
- To determine if opioids and cannabinoids target distinct basket cell populations or subnetworks.
- To elucidate the differential control of hippocampal inhibitory subnetworks by opioids and cannabinoids.
Main Methods:
- Electrophysiological recordings in hippocampal slices.
- Pharmacological manipulation with opioids and cannabinoids.
- Analysis of basket cell activity and network integration.
Main Results:
- Basket cells are selectively modulated by either opioids or cannabinoids, not both.
- Opioids and cannabinoids differentially control specific inhibitory subnetworks.
- Suppression of distinct interneuron types by these neuromodulators affects different temporal epochs of inhibition.
Conclusions:
- Hippocampal basket cells exhibit cell-type specific sensitivity to opioids and cannabinoids.
- Differential neuromodulation allows for precise temporal control over hippocampal activity patterns.
- This selective modulation provides a mechanism for fine-tuning neuronal network dynamics.
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