Antinociceptive and anti-allodynic effects of 3-alkynyl selenophene on different models of nociception in mice.
In this study, antinociceptive and anti-hyperalgesic effects of 3-alkynyl selenophene (3-ASP) were evaluated in mice. Acute toxicity of 3-ASP (1-50 mg/kg, per oral) was investigated in mice. 3-ASP neither caused toxicity nor affects locomotor activity in the rota-rod test. 3-ASP did not change plasma aspartate (AST) and alanine aminotransferase (ALT) activities, urea and creatinine levels. 3-ASP caused a significant increase in tail-immersion and hot-plate response latencies time. 3-ASP inhibited early and late phases of nociception caused by intraplantar (i.pl.) injection of formalin. 3-ASP reduced nociception produced by i.pl. injection of glutamate, bradykinin, phorbol myristate acetate (PMA) and capsaicin in mice. Mechanical hyperalgesia induced by Freund's Complete Adjuvant (CFA) was attenuated by 3-ASP administration to mice (maximal inhibition of 42+/-11%). The anti-hyperalgesic effect of 3-ASP was maintained for up to 6 h. The antinociceptive effect of 3-ASP was not abolished by naloxone (5 mg/kg), discarding the involvement of opioidergic mechanism in this effect. These results indicate that 3-ASP at a dose range of 5-50 mg/kg was especially potent and produced systemic anti-hyperalgesic and antinociceptive actions in mice.
Wilhelm
Ethel A
EA
Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, CEP 97105-900, RS, Brazil.
Jesse
Cristiano R
CR
Bortolatto
Cristiani F
CF
Nogueira
Cristina W
CW
Savegnago
Lucielli
L
D000700:Analgesics; D000818:Animals; D001920:Bradykinin; D002211:Capsaicin; D005557:Formaldehyde; D005620:Freund's Adjuvant; D018698:Glutamic Acid; D006358:Hot Temperature; D006930:Hyperalgesia / Q000139:chemically induced / Q000188:drug therapy; D007101:Immersion; D007249:Inflammation / Q000139:chemically induced / Q000150:complications / Q000473:pathology; D008297:Male; D051379:Mice; D009043:Motor Activity / Q000187:drug effects; D016566:Organoselenium Compounds / Q000494:pharmacology* / Q000633:toxicity; D010147:Pain Measurement / Q000187:drug effects*; D011930:Reaction Time / Q000187:drug effects; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
D000700:Analgesics; D016566:Organoselenium Compounds; D005557:Formaldehyde; D018698:Glutamic Acid; D005620:Freund's Adjuvant; D013755:Tetradecanoylphorbol Acetate; D002211:Capsaicin; D001920:Bradykinin