Degranulation of mast cells and histamine release involved in rat pain-related behaviors and edema induced by scorpion Buthus martensi Karch venom.

Abstract

In the present study, it was investigated whether the degranulation of mast cells and histamine release were involved in rat pain-related behaviors and edema induced by the venom of scorpion Buthus martensi Karch (BmK) or not. It was found that the obvious degranulation of mast cells could be triggered in rat hindpaw skin by BmK venom. The chronic degranulation of mast cells using compound 48/80 relieved the spontaneous nociceptive responses, the primary thermal and bilateral mechanical hyperalgesia and the rat paw edema, as well as partially reduced c-Fos expression in superficial layers (laminae I-II) of bilateral spinal cord induced by BmK venom. In addition, individual peripheral co-administration of either 100 nmol chlorpheniramine or 100 nmol pyrilamine (histamine H(1) receptor antagonist) or 500 nmol cimetidine (histamine H(2) receptor antagonist) and BmK venom suppressed the spontaneous nociceptive responses, partially the primary thermal and bilateral mechanical hyperalgesia and rat paw edema induced by BmK venom. Thus, these results suggest that the peripheral cellular incidents of mast cells degranulation and histamine release are involved in BmK venom-induced pain-related behaviors and inflammation.

• Authors: Tong Liu, Zhan-Tao Bai, Xue-Yan Pang, Zhi-Fang Chai, Feng Jiang, Yong-Hua Ji
• Journal: European journal of pharmacology (Eur J Pharmacol) Vol. 575 Issue 1-3 Pg. 46-56 (Dec 01 2007) ISSN: 0014-2999 [Print] Netherlands
• PMID: 17716653 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Histamine Antagonists
• Proto-Oncogene Proteins c-fos
• Scorpion Venoms
• martentoxin, Buthus martensi
• Chlorpheniramine
• Cimetidine
• Pyrilamine

Topics

• Animals
• Chlorpheniramine (pharmacology)
• Cimetidine (pharmacology)
• Dose-Response Relationship, Drug
• Edema (chemically induced, pathology)
• Histamine Antagonists (pharmacology)
• Histamine Release (drug effects, physiology)
• Hyperalgesia (chemically induced, pathology)
• Inflammation (chemically induced, pathology)
• Mast Cells (drug effects, metabolism, pathology)
• Pain (chemically induced, pathology)
• Proto-Oncogene Proteins c-fos (genetics, metabolism)
• Pyrilamine (pharmacology)
• Rats
• Rats, Sprague-Dawley
• Scorpion Venoms
• Scorpions (chemistry)
• Spinal Cord (metabolism)
• Time Factors