Abstract | PURPOSE: METHODS: The effects of the selective μ agonist [D-Ala(2),-N-Me-Phe(4), Gly(5)-ol] enkephalin ( DAMGO) on ischemia-induced agonal currents were examined in the spinal lamina IX neurons of neonatal rats by using the whole-cell patch-clamp technique. Ischemia was simulated in vitro by oxygen/ glucose deprivation. RESULTS:
DAMGO (1 μM) produced outward currents in ~60% of spinal lamina IX neurons at a holding potential of -70 mV. Superfusion with ischemia-simulating medium elicited an agonal current. The latency was 457 ± 18 s. Despite its neuromodulatory effects, DAMGO did not significantly change the latencies of the agonal currents with (440 ± 23 s) or without (454 ± 33 s) DAMGO-induced currents. CONCLUSION: Activation of MORs does not influence ongoing ischemia-induced neuronal death. Our findings indicate that MOR agonist administration should be suitable as an anesthetic during aortic surgery.
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Authors | Hiroyuki Honda, Hiroshi Baba, Tatsuro Kohno |
Journal | Journal of anesthesia
(J Anesth)
Vol. 28
Issue 6
Pg. 839-45
(Dec 2014)
ISSN: 1438-8359 [Electronic] Japan |
PMID | 24748402
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Analgesics, Opioid
- Receptors, Opioid, mu
- Enkephalin, Ala(2)-MePhe(4)-Gly(5)-
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Topics |
- Analgesics, Opioid
(pharmacology)
- Animals
- Animals, Newborn
- Enkephalin, Ala(2)-MePhe(4)-Gly(5)-
(pharmacology)
- Neurons
(drug effects)
- Patch-Clamp Techniques
- Rats
- Rats, Wistar
- Receptors, Opioid, mu
(agonists)
- Spinal Cord Ischemia
(physiopathology)
- Synaptic Transmission
(drug effects)
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