| In vivo: |
| J Pharm Pharmacol. 2012 Dec;64(12):1722-9. | | Antinociceptive activity of carvacrol (5-isopropyl-2-methylphenol) in mice.[Pubmed: 23146035] | Carvacrol (5-Isopropyl-2-methylphenol) is a monoterpenic phenol which is present in the essential oil of oregano and thyme. We have investigated the behavioural effects of 5-Isopropyl-2-methylphenol in animal models of pain, such as acetic acid-induced abdominal constriction, formalin and hot-plate tests in mice. The spontaneous motor activity of animals treated with 5-Isopropyl-2-methylphenol was investigated using open-field and rotarod tests.
METHODS AND RESULTS:
5-Isopropyl-2-methylphenol was administered orally, at single doses of 50 and 100 mg/kg while indometacin (5 mg/kg), morphine (7.5 mg/kg) and diazepam (2 mg/kg) were used as standard drugs. Naloxone (1 mg/kg) and l-arginine (150 mg/kg) were used to elucidate the possible antinociceptive mechanism of 5-Isopropyl-2-methylphenol on acetic acid-induced abdominal constriction and formalin tests. The results showed that 5-Isopropyl-2-methylphenol produced significant inhibitions on nociception in the acetic acid-induced abdominal constriction, formalin and hot-plate tests. In the open-field and rotarod tests 5-Isopropyl-2-methylphenol did not significantly impair the motor performance. The effect of the highest dose of 5-Isopropyl-2-methylphenol in mice in the acetic acid-induced abdominal constriction and formalin tests were not reversed by naloxone or l-arginine.
CONCLUSIONS:
Based on these results, it has been suggested that 5-Isopropyl-2-methylphenol presents antinociceptive activity that may not act through the opioid system nor through inhibition of the nitric oxide pathway. | | J Neurotrauma. 2012 Dec 10;29(18):2831-4. | | Carvacrol together with TRPC1 elimination improve functional recovery after traumatic brain injury in mice.[Pubmed: 22994850] | We hypothesized that TRP channels of the TRPC subfamily may be involved in post-TBI pathophysiology and that the compound 5-Isopropyl-2-methylphenol (carvacrol), by inhibition of TRP channels, may exert neuroprotective effect after TBI.
METHODS AND RESULTS:
To test these suppositions, 5-Isopropyl-2-methylphenol was given to mice after TBI and its effect on their functional recovery was followed for several weeks. Our results show that neurological recovery after TBI was significantly enhanced by application of 5-Isopropyl-2-methylphenol. To better define the type of the specific channel involved, the effect of 5-Isopropyl-2-methylphenol on the extent and speed of recovery after TBI was compared among mice lacking TRPC1, TRPC3, or TRPC5, relative to wild type controls. We found that neurological recovery after TBI was significantly enhanced by combining 5-Isopropyl-2-methylphenol with TRPC1 elimination, but not by the absence of TRPC3 or TRPC5, showing a synergistic effect between 5-Isopropyl-2-methylphenol application and TRPC1 elimination.
CONCLUSIONS:
We conclude that TRPC1-sensitive mechanisms are involved in TBI pathology, and that inhibition of this channel by 5-Isopropyl-2-methylphenol enhances recovery and should be considered for further studies in animal models and humans. |
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