Effect of systemic adenosine on pain and secondary hyperalgesia associated with the heat/capsaicin sensitization model in healthy volunteers

被引:24
作者
Dirks, J
Petersen, KL
Rowbotham, MC
Dahl, JB
机构
[1] Herlev Hosp, Lab Pain Physiol, Dept Anaesthesiol, DK-2730 Herlev, Denmark
[2] Univ Calif San Francisco, Dept Neurol, Pain Clin Res Ctr, San Francisco, CA 94143 USA
[3] Univ Calif San Francisco, Dept Anesthesia, Pain Clin Res Ctr, San Francisco, CA 94143 USA
关键词
adenosine; allodynia; central sensitization; hyperalgesia; pain;
D O I
10.1097/00115550-200109000-00005
中图分类号
R614 [麻醉学];
学科分类号
100217 ;
摘要
Background and objectives: Adenosine is an endogenous compound that may have analgesic effects. Results from clinical trials are not consistent, however, and there is a need for large-scale, randomized, placebo-controlled studies to clarify the role of adenosine in the treatment of pain states, including acute nociceptive pain and pain involving central sensitization. Methods: The analgesic and antihyperalgesic effect of systemic adenosine on the heat/capsaicin sensitization model of experimental pain was investigated in 25 healthy human volunteers. Sensitization was produced by heating the skin to 45 degreesC for 5 minutes, followed by a 30-minute application of 0.075% capsaicin cream, and maintained by periodically reheating the sensitized skin to 40 degreesC for 5 minutes at 40-minute intervals. Subjects received intravenous adenosine 60 mug/kg/min or saline for 85 minutes. Areas of secondary hyperalgesia to von Frey hair and brush stimulation, heat-pain detection thresholds (HPDTs) in normal and sensitized skin, and painfulness of stimulation with 45 degreesC for 1 minute (LTS) in normal skin were quantified before, during, and after study drug infusion. Results: Systemic adenosine had no effect on the area of secondary hyperalgesia to von Frey hair or brush stimulation, HPDT in normal or sensitized skin, or painfulness of LTS in normal skin. Conclusion: We conclude that adenosine has no effect on acute nociceptive pain induced by heat stimulation or on secondary hyperalgesia induced by heat/capsaicin sensitization in healthy volunteers.
引用
收藏
页码:414 / 419
页数:6
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