Peripheral 5-HT3 Receptors Are Involved in the Antinociceptive Effect of Bunodosine 391

Author(s)

Ferreira Junior, Wilson Alves ^[1] ; Zaharenko, Andre Junqueira ^[2] ; Kazuma, Kohei ^[3] ; Picolo, Gisele ^[1] ; Gutierrez, Vanessa Pacciari ^[1] ; de Freitas, Jose Carlos ^[4] ; Konno, Katsuhiro ^[3] ; Cury, Yara ^[1]

Affiliation

^[1] Butantan Inst, Lab Pain & Signaling, Ave Vital Brasil 1500, BR-05503900 Sao Paulo, SP - Brazil

^[2] Butantan Inst, Genet Lab, Ave Vital Brasil 1500, BR-05503900 Sao Paulo, SP - Brazil

^[3] Toyama Univ, Inst Nat Med, Sugitani 2630, Toyama 9300194 - Japan

^[4] Univ Sao Paulo, Biosci Inst, Dept Physiol, Rua Matao, Trav 14, 321, BR-05508090 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: TOXINS; v. 10, n. 1 JAN 2018.
• Web of Science Citations: 1

Abstract

Bunodosine 391 (BDS 391), a low molecular weight compound isolated from the sea anemone Bunodosoma cangicum, increases the nociceptive threshold and inhibits inflammatory hyperalgesia. Serotonin receptors are involved in those effects. In this study, we have expanded the characterization of the antinociceptive effect of BDS 391 demonstrating that, in rats: (a) the compound inhibits (1.2-12 ng/paw) overt pain, in the formalin test, and mechanical hyperalgesia (0.6-6.0 ng/paw) detected in a model of neuropathic pain; (b) intraplantar administration of ondansetron, a selective 5-HT3 receptor antagonist, blocks the effect of BDS 391, whereas ketanserin, a 5-HT2 receptor antagonist, partially reversed this effect, indicating the involvement of peripheral 5-HT2 and 5-HT3 receptors in BDS 391 antinociception; and (c) in binding assay studies, BDS 391 was not able to displace the selective 5-HT receptor antagonists, suggesting that this compound does not directly bind to these receptors. The effect of biguanide, a selective 5-HT3 receptor agonist, was also evaluated. The agonist inhibited the formalin's nociceptive response, supporting an antinociceptive role for 5-HT3 receptors. Our study is the first one to show that a non-peptidic low molecular weight compound obtained from a sea anemone is able to induce antinociception and that activation of peripheral 5-HT3 receptors contributes to this effect. (AU)

• FAPESP's process: 13/07467-1 - CeTICS - Center of Toxins, Immune-Response and Cell Signaling
• Grantee: Hugo Aguirre Armelin
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 11/01183-6 - Characterization of the effect of BDS 391, an analgesic compound, on 5-HT3 receptors and ion channels
• Grantee: Wilson Alves Ferreira Júnior
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 09/08089-5 - Molecular mechanisms involved in the analgesic action of the compound Bunodosina 391 isolated from Bunodosoma cangicum sea anemone venom
• Grantee: Yara Cury
• Support Opportunities: Regular Research Grants