Warianty tytułu
Role of central mi-opioid receptors in the wall of gastric myoelectrical spike burst activity in sheep
Języki publikacji
Abstrakty
The present study examined the participation of central µ-opioidergic receptors in the modulatory/inhibitory effect of D-Ala², N-Me-Phe⁴, Gly⁵-ol enkephalin (DAGO), a selective mu-opioid receptor agonist, on the spike burst activity of the rumen, reticulum and antrum prior to and 10 min after the intracerbroventriculary (i.c.v) - during 1 min - infusion of naloxonazine, a competitive mu-opioid receptor antagonist in sheep. DAGO was infused i.c.v. at a doses 0.02, 0.05, 0.1 and 1.0 µg × kg⁻¹, naloxonazine at doses 5 times higher. All the doses of DAGO administered i.c.v. significantly inhibited myoelectrical activity of the wall of the rumen, reticulum and abomasum. The effects of DAGO were prevented by naloxonazine previously infused at doses of 0.1, 0.5, 1.0 and 5.0 µg × kg⁻¹ (i.e. at a doses 5 times higher in comparison to doses of DAGO). The results of this present study indicate that central µ-opioid receptors participated in the inhibitory action of a specific opioid (DAGO) on myoelectrical activity of the forestomaches and antrum in sheep. Furthermore, this result suggests that it is a specific mu-receptor stimulation, because naloxonazine, a competitive µ-receptor antagonist, prevented the modulatory action of DAGO on the reticular, ruminal and antral motility in sheep.
Wydawca
Czasopismo
Rocznik
Tom
Numer
Strony
1478-1481
Opis fizyczny
s.1478-1481,rys.,bibliogr.
Twórcy
autor
- Szkola Glowna Gospodarstwa Wiejskiego, ul.Nowoursynowska 159, 02-776 Warszawa
autor
Bibliografia
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- 4.Kania B. F., Domański E.: Central adrenergic pathway participation in the inhibitory effect of endorphins on forestomach motility in sheep. Small Res. Comm. 1986, 19, 247-254.
- 5.Kania B. F., Brikas P., Buéno L., Fioramonti J., Zaremba-Rutkowska M.: The evaluation of the role of CCK in the opioid modulation of the motility of the gastrointestinal tract in sheep. J. Vet. Pharmacol. Therap. 1999, 22, 153-160.
- 6.Kania B. F., van Miert A. S. J. P. A. M.: Beta-endorphin-induced inhibition of rumen constraction in sheep. The effect of hypothalamic de-efferentiation. J. Vet. Pharmacol. Therap. 1992b, 15, 379-385.
- 7.Kania B. F., van Miert A. S. J. P. A. M.: Inhibition of reticulo-rumen motility by i.c.v. administered endorfins in conscious sheep. Acta Vet. Scand. 1991, 87, 178-180.
- 8.Kania B. F., van Miert A. S. J. P. A. M.: Modification by 6-OHDA of the infibition of extrintic rumen constractions in sheep produced by β-endorphin. J. Vet. Pharmacol. Therap. 1992a, 15, 36-44.
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- 10.Maas C. L., van Duin C. T. M., Woutersen-van Nijanten F. M. A.: Similar action of proposed mu, kappa and delta opioid receptor agonists on cyclical ruminal motility in conscious goats, [w:] Maas C. L. (red.): Modulation of forestomach motility in small ruminants. PhD thetis, Utrecht Univ., The Netherlands 1884, pp 25-34.
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- 12.Ruckebusch J.: The electrical activity of the digestive tract of the sheep as an indication of the mechanical events in the various regions. J. Physiol. 1970, 210, 857-882.
- 13.Ruckebusch J., Bardon T., Pairet M.: Opioid control of the ruminant stomach motility: Functional importance of µ, ê and ä receptors. Life Sci. 1984, 35, 1731-1738.
- 14.Sorraing J. M., Fioramonti J., Buéno L., Eno J.: Central and peripheral serotoninegic control of forestomach motility in sheep. J. Vet. Pharmacol.Therap. 1985, 8, 312-319.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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