Display options
Share it on

Res Pharm Sci. 2016 Jul;11(4):293-302. doi: 10.4103/1735-5362.189297.

Effects of topical and systemic administration of Eugenia caryophyllata buds essential oil on corneal anesthesia and analgesia.

Research in pharmaceutical sciences

Emad Khalilzadeh, Reza Hazrati, Gholamreza Vafaei Saiah

Affiliations

  1. Division of Physiology, Department of Basic Science, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, I.R. Iran.

PMID: 27651809 PMCID: PMC5022377 DOI: 10.4103/1735-5362.189297

Abstract

Clinical studies suggest that essential oil of Eugenia caryophyllata (Clove) buds (EOEC) is efficacious in the treatment of dental pain. In the present study, we investigated the analgesic and local anesthetic effects of EOEC and its possible mechanisms of action in acute corneal pain in rats. EOEC was extracted by hydro-distillation in a Clevenger type apparatus from clove buds. The acute corneal pain was induced by applying a drop (40 µl) of 5 M NaCl solution on the corneal surface, and the numbers of eye wipes were counted during the first 30 s. The mechanical sensation of the cornea was evaluated by calibrated Von Frey filaments. Systemic administration of EOEC (100 and 200 mg/kg, SC) and morphine (2.5 and 5 mg/kg, IP) produced a significant antinociceptive effect in acute corneal pain. Pretreatment with naloxone or atropine prevented the EOEC-induced analgesia. However, L-arginine and methylene blue did not change the suppressive effect of EOEC on corneal pain response. Topical application of EOEC, eugenol and lidocaine significantly decreased corneal sensitivity. Combination treatments of eugenol (25 µg) with lidocaine (0.5%) and EOEC (50 µg) with lidocaine (0.5%) also significantly suppressed corneal sensitivity. Systemic administration of EOEC produced analgesia in the acute corneal pain through mechanisms that involved both opioidergic and cholinergic systems. In addition, topical instillation of EOEC, eugenol, and lidocaine produced local anesthesia in the rat cornea. Sub-anesthetic doses of EOEC or eugenol produced a significant local anesthetic effect when concurrently used with the sub-anesthetic dose of lidocaine.

Keywords: Analgesic; Corneal pain; Eugenia caryophyllata; Eugenol; Lidocaine; Local anesthesia

References

  1. Farmaco. 2001 May-Jul;56(5-7):387-9 - PubMed
  2. Neuroscience. 2014 Mar 7;261:153-60 - PubMed
  3. Arch Pharm Res. 2011 Mar;34(3):501-7 - PubMed
  4. Invest Ophthalmol Vis Sci. 2010 Aug;51(8):3969-76 - PubMed
  5. J Dent Res. 1988 Aug;67(8):1092-6 - PubMed
  6. Ocul Surf. 2009 Jan;7(1):28-40 - PubMed
  7. Fitoterapia. 2011 Mar;82(2):198-202 - PubMed
  8. J Agric Food Chem. 2009 May 27;57(10 ):4313-8 - PubMed
  9. J Med Microbiol. 2009 Nov;58(Pt 11):1454-62 - PubMed
  10. Pharmacol Biochem Behav. 2009 Apr;92(2):314-8 - PubMed
  11. Invest Ophthalmol Vis Sci. 2011 Jan 21;52(1):485-93 - PubMed
  12. J Neurophysiol. 1998 Aug;80(2):465-92 - PubMed
  13. J Dent Res. 1997 Apr;76(4):848-51 - PubMed
  14. Brain Res Brain Res Protoc. 2005 Dec;16(1-3):44-9 - PubMed
  15. Phytother Res. 2007 Jun;21(6):501-6 - PubMed
  16. Pharmacol Rep. 2008 Mar-Apr;60(2):219-24 - PubMed
  17. Eur J Pharmacol. 2007 Aug 27;569(3):228-36 - PubMed
  18. Pain. 2010 Jun;149(3):522-8 - PubMed
  19. Arch Int Pharmacodyn Ther. 1983 Dec;266(2):229-38 - PubMed
  20. J Dent Res. 2006 Oct;85(10):900-4 - PubMed
  21. Pain. 2009 Jul;144(1-2):84-94 - PubMed
  22. Pharmacogn Mag. 2014 Apr;10(Suppl 2):S276-82 - PubMed
  23. Proc Natl Acad Sci U S A. 2008 Jul 1;105(26):9099-104 - PubMed
  24. Vet Ophthalmol. 2013 Jan;16(1):43-6 - PubMed
  25. J Clin Invest. 2008 Feb;118(2):763-76 - PubMed
  26. Phytother Res. 2009 Nov;23(11):1559-64 - PubMed
  27. Anesth Analg. 1997 Oct;85(4):847-53 - PubMed
  28. J Dent Res. 2005 Sep;84(9):848-51 - PubMed
  29. Clin Exp Ophthalmol. 2014 Mar;42(2):159-68 - PubMed
  30. Brain Res Rev. 2009 Apr;60(1):255-66 - PubMed
  31. Pain. 1983 Jun;16(2):109-10 - PubMed
  32. Exp Eye Res. 2004 Mar;78(3):513-25 - PubMed
  33. J Dent Res. 2003 Oct;82(10):781-5 - PubMed
  34. Phytother Res. 2010 Nov;24(11):1645-53 - PubMed
  35. Physiol Behav. 1999 Nov;67(5):711-6 - PubMed

Publication Types