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Titolo:
INVOLVEMENT OF CERULOSPINAL GLUTAMATERGIC NEUROTRANSMISSION IN FENTANYL-INDUCED MUSCULAR RIGIDITY IN THE RAT
Autore:
FU MJ; TSEN LY; LEE TY; LUI PW; CHAN SHH;
Indirizzi:
NATL YANG MING UNIV,CTR NEUROSCI TAIPEI 11221 TAIWAN NATL YANG MING UNIV,CTR NEUROSCI TAIPEI 11221 TAIWAN VET GEN HOSP TAIPEI TAIWAN NATL YANG MING UNIV,DEPT ANESTHESIOL TAIPEI 11221 TAIWAN NATL YANG MING UNIV,DEPT PHARMACOL TAIPEI 11221 TAIWAN
Titolo Testata:
Anesthesiology
fascicolo: 6, volume: 87, anno: 1997,
pagine: 1450 - 1459
SICI:
0003-3022(1997)87:6<1450:IOCGNI>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAT SPINAL-CORD; INDUCED MUSCLE RIGIDITY; COERULOSPINAL NORADRENERGIC PATHWAY; GLUTAMINASE-LIKE IMMUNOREACTIVITY; AMINO-ACID RECEPTORS; LOCUS COERULEUS; NEURONS; BRAIN; OPIATE; LOCALIZATION;
Keywords:
ACTION, FOCUS CERULEUS, MICROINJECTION, LUMBAR SPINAL CORD, INTRATHECAL ADMINISTRATION; ANALGESIA, FENTANYL; ANESTHESIA, KETAMINE; ANTAGONIST, N-METHYL-D-ASPARTATE (NMDA) AND NON-NMDA RECEPTOR BLOCKERS AGONIST, KAINIC ACID, NMDA; PHYSIOLOGY, ELECTROMYOGRAPHIC ACTIVATION, MUSCULAR RIGIDITY;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
M.J. Fu et al., "INVOLVEMENT OF CERULOSPINAL GLUTAMATERGIC NEUROTRANSMISSION IN FENTANYL-INDUCED MUSCULAR RIGIDITY IN THE RAT", Anesthesiology, 87(6), 1997, pp. 1450-1459

Abstract

Background: Investigators in the author's laboratory previously established the critical participation of the cerulospinal noradrenergic pathway in muscular rigidity elicited by fentanyl. The identification ofcolocalization of glutamate with tyrosine hydroxylase in most locus ceruleus neurons suggests a role for cerulospinal glutamatergic neurotransmission in fentanyl-induced muscular rigidity. This suggestion and the subtype(s) of glutamate receptors involved were investigated here. Methods: Electromyographic signals activated by bilateral microinjection of 2.5 mu g fentanyl into the locus ceruleus were recorded differentially from the left sacrococcygeus dorsi lateralis muscle of adult male Sprague-Dawley rats. The effect of intrathecal administration at the lower lumbar spinal cord of various N-methyl-D-aspartate (NMDA) andnon-NMDA receptor antagonists or agonists on this index of muscular rigidity was studied. Rats were under mechanical ventilation, and intravenous infusion of ketamine (30 mg.kg(-1).h(-1)) was maintained until 10 min before fentanyl was administered. Results: Microinjection of fentanyl bilaterally into the locus ceruleus increased the root mean square and decreased the mean power frequency values of electromyographicsignals. The efficacy of fentanyl to elicit muscular rigidity in thismanner was significantly reduced by previous intrathecal administration of either 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX), 0,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imine maleate (MK-801), D-(-)-2-amino-5-phosphonovaleric acid (AP5), or -)-3-(2-carboxypiperazin-4-yl)-propyl-1-phosphonic acid (CPP). Intrathecal administration of kainic acid or NMDA also resulted in significant electromyographic activation. Conclusions: In addition to the cerulospinal noradrenergic mechanism, thecerulospinal glutamatergic pathway and both NMDA and non-NMDA receptors in the spinal cord may mediate fentanyl-induced muscular rigidity in the rat.

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Documento generato il 23/01/20 alle ore 03:23:46