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  • Title: Antiinflammatory and antinociceptive effects of 1,8-cineole a terpenoid oxide present in many plant essential oils.
    Author: Santos FA, Rao VS.
    Journal: Phytother Res; 2000 Jun; 14(4):240-4. PubMed ID: 10861965.
    Abstract:
    1,8-Cineole (cineole), a terpenoid oxide present in many plant essential oils displays an inhibitory effect on some types of experimental inflammation in rats, i.e. paw oedema induced by carrageenan and cotton pellet-induced granuloma. Cineole also inhibits in mice, the acetic acid-induced increase in peritoneal capillary permeability and the chemical nociception induced by intraplantar formalin and intraperitoneal acetic acid. Activity was present in these tests, at an oral dose range of 100-400 mg/kg. In the formalin test, the antinociceptive effect of cineole was not reversed by pretreatment of mice with naloxone (1 mg/kg, s.c.), a mu-opioid receptor antagonist, suggesting the involvement of a non-opioid mechanism. Cineole demonstrated a significant inhibitory effect on locomotion and also potentiated the pentobarbital sleeping time in mice, indicating a plausible depressant effect on the central nervous system. The present results, when taken together with the recent reports that describe the inhibitory effects of cineole on the formation of prostaglandins and cytokines by stimulated monocytes in vitro, may provide additional evidence for its potential beneficial use in therapy as an antiinflammatory and analgesic agent.
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