Abstract：
:Prostaglandin E2 increases bradykinin-induced spike activity from polymodal nociceptors of the skin and deep tissues in animals, suggesting sensitization of these receptors. To see whether these neurophysiological observations in animals correspond with increased pain intensity in humans, and whether also vascular nociceptors are sensitized, we studied in humans the effects of prostaglandin E2 on the intensity of pain evoked by bradykinin via the nociceptive systems of skin and veins. In seven healthy subjects, bradykinin was injected into the skin and into a vascularly isolated hand vein segment, prior to and after local application of prostaglandin E2. Subsequent pain intensity was recorded continuously with an electronically controlled visual analogue scale. Prostaglandin E2 alone never elicited pain, but without exception increased the intensity of bradykinin-induced pain in a concentration-related manner at concentrations from 10(-9) to 10(-6) M, both in skin and veins. Thus, bradykinin is more painful after pretreatment with prostaglandin E2, suggesting sensitization of nociceptors of the skin, but also of hand veins in humans.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Kindgen-Milles Ddoi
10.1016/0014-2999(95)00575-7subject
Has Abstractpub_date
1995-12-29 00:00:00pages
491-6issue
2-3eissn
0014-2999issn
1879-0712pii
0014-2999(95)00575-7journal_volume
294pub_type
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journal_title：European journal of pharmacology
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