Neutrophils and the calcium-binding protein MRP-14 mediate carrageenan-induced antinociception in mice

Neutrophils and the calcium-binding protein MRP-14 mediate carrageenan-induced antinociception in mice

Autor Pagano, R. L. Google Scholar
Dias, Maria Angela Amorim Autor UNIFESP Google Scholar
Dale, C. S. Google Scholar
Giorgi, R. Google Scholar
Instituição Butantan Inst
Universidade Federal de São Paulo (UNIFESP)
Resumo Background: We have previously shown that the calcium-binding protein MRP-14 secreted by neutrophils mediates the antinociceptive response in an acute inflammatory model induced by the intraperitoneal injection of glycogen in mice.Aim: in an attempt to broaden the concept that neutrophils and MRP-14 controls inflammatory pain induced by different type of irritants, in the present study, after demonstrating that carrageenan (Cg) also induces atinociception in mice, we investigated the participation of both neutrophils and MRP-14 in the phenomenon.Methods: Male Swiss mice were injected intraperitoneally with Cg and after different time intervals, the pattern of cell migration of the peritoneal exudate and the nociceptive response of animals submitted to the writhing test were evaluated. the participation of neutrophils and of the MRP-14 on the Cg effect was evaluated by systemic inoculation of monoclonal antibodies anti-granulocyte and anti-MRP-14.Results: Our results demonstrate that the acute neutrophilic peritonitis evoked by Cg induced antinociception 2, 4 and 8 h after inoculation of the irritant. Monoclonal antibodies anti-granulocyte or anti-MRP-14 reverts the antinociceptive response only 2 and 8 h after Cg injection. the antibody anti-MRP-14 partially reverts the antinociception observed after 4 h of Cg injection while the anti-granulocyte antibody enhances this effect. This effect is reverted by simultaneous treatment of the animals with both antibodies. After 4 h of Cg injection in neutrophil-depleted mice a significant expression of the calcium-binding protein MRP-14 was detected in the cytoplasm of peritoneal macrophages. This suggests that the enhancement of the effect observed after treatment with the anti-neutrophil antibody may be due to secretion of MRP-14 by macrophages. It has also been demonstrated that endogenous opioids and glucocorticoids are not involved in the antinociception observed at the 4th hour after Cg injection.Conclusion: These data support the hypothesis that neutrophils and the calcium-binding protein MRP-14 are participants of the endogenous control of inflammatory pain in mice despite the model of acute inflammation used.
Palavra-chave MRP-14
Idioma Inglês
Data de publicação 2002-01-01
Publicado em Mediators of Inflammation. Basingstoke: Carfax Publishing, v. 11, n. 4, p. 203-210, 2002.
ISSN 0962-9351 (Sherpa/Romeo, fator de impacto)
Publicador Carfax Publishing
Extensão 203-210
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000177984800002
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