Abstract | BACKGROUND: METHODS: HP was prepared on solid phase by in situ neutralization. After chronic intrathecal catheterization, mechanical hypersensitivity was produced in male Wistar rats by injection of carrageenan (300 μg/30 μL) into the tibiotarsal joint of one of the hind legs. Three hours after carrageenan administration, the ligands were administered intrathecally. The mechanical threshold was assessed using a dynamic aesthesiometer. RESULTS: 2-AG (1-200 μg) and anandamide (10-200 μg) decreased carrageenan-induced mechanical allodynia in a dose-dependent manner, whereas HP had no antinociceptive effect in a wide dose range (0.3-30 μg). The effect of 2-AG was prevented by the CB(1) receptor antagonist AM 251, but not by the CB(2) antagonist SSR144528-2. HP (3 and 30 μg) also inhibited the effect of 2-AG. None of the ligands influenced the degree of edema. CONCLUSIONS:
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Authors | Zita Petrovszki, Gyula Kovacs, Csaba Tömböly, György Benedek, Gyongyi Horvath |
Journal | Anesthesia and analgesia
(Anesth Analg)
Vol. 114
Issue 6
Pg. 1346-52
(Jun 2012)
ISSN: 1526-7598 [Electronic] United States |
PMID | 22451592
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Analgesics
- Arachidonic Acids
- Cannabinoid Receptor Modulators
- Cnr2 protein, rat
- Endocannabinoids
- Glycerides
- Hemoglobins
- Peptide Fragments
- Polyunsaturated Alkamides
- Receptor, Cannabinoid, CB1
- Receptor, Cannabinoid, CB2
- hemopressin
- glyceryl 2-arachidonate
- Carrageenan
- anandamide
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Topics |
- Analgesics
(administration & dosage, pharmacology)
- Animals
- Arachidonic Acids
(administration & dosage, pharmacology)
- Arthralgia
(chemically induced, diagnosis, physiopathology, prevention & control)
- Arthritis, Experimental
(chemically induced, diagnosis, physiopathology, prevention & control)
- Cannabinoid Receptor Modulators
(administration & dosage, pharmacology)
- Carrageenan
- Dose-Response Relationship, Drug
- Edema
(physiopathology, prevention & control)
- Endocannabinoids
- Glycerides
(administration & dosage, pharmacology)
- Hemoglobins
(administration & dosage, pharmacology)
- Hindlimb
- Injections, Spinal
- Joints
(drug effects, innervation, physiopathology)
- Male
- Pain Measurement
- Pain Threshold
(drug effects)
- Peptide Fragments
(administration & dosage, pharmacology)
- Polyunsaturated Alkamides
(administration & dosage, pharmacology)
- Rats
- Rats, Wistar
- Receptor, Cannabinoid, CB1
(drug effects)
- Receptor, Cannabinoid, CB2
(drug effects)
- Time Factors
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