Effects of Topically Applied Capsaicin Cream on Neurogenic Inflammation and Thermal Sensitivity in Rats.
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- Yoshimura Masakazu
- Central Research Laboratories,Maruishi Pharmaceutical Co.,Ltd.,2-2-18 Imazu-Naka,Tsurumi-ku,Osaka 538-0042,Japan
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- Yonehara Norifumi
- Department of Pharmacology Osaka University Faculty of Dentistry,1-8 Yamadaoka,Suita,Osaka 565-0871,Japan
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- Ito Takashi
- Department of Oral & Maxillofacial Surgery 2,Osaka University Faculty of Dentistry,1-8 Yamadaoka,Suita,Osaka 565-0871,japan
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- Kawai Yoichiro
- Central Research Laboratories,Maruishi Pharmaceutical Co.,Ltd.,2-2-18 Imazu-Naka,Tsurumi-ku,Osaka 538-0042,Japan
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- Tamura Takashi
- Central Research Laboratories,Maruishi Pharmaceutical Co.,Ltd.,2-2-18 Imazu-Naka,Tsurumi-ku,Osaka 538-0042,Japan
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Abstract
The effects of capsaicin cream on neurogenic inflammation and thermal nociceptive threshold were investigated in rats.Firstly, for topical application of capsaicin cream to hind paw, we shaped boots from dental cement to prevent the animals from licking off the drug.Capsaicin cream(1%) led to significant increases in the amounts of Evans blue and substance P(SP) released into the perfusate, and the former response was significantly suppressed by pretreatment with RP67580, an NK1-receptor antagonist, but not by treatment with an NK2-receptor antagonist.Subsequent electrical stimulation of the sciatic nerve resulted in a significant reduction in Evans blue and SP extravasation 24h after topical application of capsaicin cream.On the other hand, when capsaicin cream was repeatadly applied to both hind paws once a day, withdrawal latency for noxious heat stimulation decreased after 24h, and this thermal hyperalgesia was reversed 3 days later.These results suggest that capsaicin cream initially affects neurogenic inflammation mechanisms and then blocks the pain transmission mechanism.
Journal
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- The Japanese Journal of Pharmacology
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The Japanese Journal of Pharmacology 82 (2), 116-121, 2000
The Japanese Pharmacological Society
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Details 詳細情報について
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- CRID
- 1390282679263582976
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- NII Article ID
- 10008183031
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- NII Book ID
- AA00691188
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- COI
- 1:CAS:528:DC%2BD3cXhsVOgtbg%3D
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- ISSN
- 13473506
- 00215198
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- NDL BIB ID
- 5283904
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- PubMed
- 10877529
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- Web Site
- http://id.ndl.go.jp/bib/5283904
- https://ndlsearch.ndl.go.jp/books/R000000004-I5283904
- https://api.elsevier.com/content/article/PII:S002151981930705X?httpAccept=text/xml
- https://api.elsevier.com/content/article/PII:S002151981930705X?httpAccept=text/plain
- https://www.jstage.jst.go.jp/article/jjp/82/2/82_2_116/_pdf
- https://search.jamas.or.jp/link/ui/2000140416
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed