Volume 16, Issue 2 (10-2010)                   Horizon Med Sci 2010, 16(2): 5-11 | Back to browse issues page

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Heshmatian B, Nasri S, Asghari Mehrabad J, Mahmoudi Far F. Antinociceptive Effects of Hydroalcoholic Extract of Lactuca Sativa Longifolia Leaves in Male Mice. Horizon Med Sci. 2010; 16 (2) :5-11
URL: http://hms.gmu.ac.ir/article-1-894-en.html
1- , s_nasri2000@yahoo.com
Abstract:   (11743 Views)

  Background and Aim: Nowadays, We have focused our attention to herbal medicines because of their side effects and expensiveness of chemical drugs . In this research, we evaluated antinociceptive effects of hydroalcoholic extract of L actuca sativa longifolia leaves using tail-flick and formalin test in male mice.

  Materials and Methods: We evaluated antinociceptive effects of hydroalcoholic exract of L actuca sativa longifolia leaves at doses of 85, 165,330,660 and 1300 mg/kg. All injections were administered intraperitoneally. Sham group received normal saline and Morphine group (1 mg/ kg i.p.) was used as positive control. The possible mechanisms of antinociceptive action of the extract were also investigated by pretreatment with Naloxane (1mg/kg i.p.) .

  Results: Hydroalcoholic extract of L actuca sativa longifolia leaves exhibited significant antinociceptive activity at doses of 165,330,660 and 1300 mg/kg in tail flick test, and maximal inhibitions were observed at doses of 660 and 1300 mg/kg (P<0.01). This extract showed antinociceptive effect at doses of 660 and 1300 mg/kg in the first phase of formalin test. The maximal effect was observed at dose of 660mg/kg, and lactuca sativa longifolia leaves extract showed significant decrease in Licking time at doses of 330,660 and 1300 mg/kg in the second phase of formalin test (P<0.001). Antinociceptive effect of hydroalcoholic extract of LS was inhibited by a Naloxane pretreatment .

  Conclusion: This study presents a remarkable antinociceptive effect which supported the traditional use of lactuca sativa longifolia. Furthermore, it seems that opioid pathway is one of the possible mechanisms of antinociceptive effect of the extract.

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Type of Study: Original | Subject: Basic Medical Science
Received: 2010/10/10

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