Efeitos do estresse cronico sobre a resposta inflamatoria em ratos

AUTOR(ES)

Fernanda Beatriz Bordoni de Godoy Datti

DATA DE PUBLICAÇÃO

2001

RESUMO

In this work we investigated the chronic stress effect on the vascular and cellular inflammatory response induced by allergic or non allergic stimulus in rats. The animaIs were submitted to the stress model proposed by WILLNER et al., 1987, that consisted of varied and transitory alterations of the environment of creation of the animaIs for 2 weeks, the control group stayed without any manipulation, except routine cares. Afier the last day of stress protocol the animaIs were submitted to the following tests: bronchoalveolar lavage (BAL), pleurisy, paw oedema induced by allergic and non aIlergic stimulus. To the BAL and allergic paw oedema protocols the animais were sensitized in the first day of stress protocol with a subcutaneous injection of ovalbumin I (OVA), afier the Iast day of the stress protocol the animais were challenged with OVA in the subplantar area or in to the airways. The pleurisy was induced by carrageenan and the non aIlergic paw oedema was induced by carrageenan or C48/80. BAL was collected 48h afier the antigenic challenge with OVA., in the pleurisy procedure the pleural lavage was collected 6 and 24h afier induction by carrageenan. The volume ofpaws measure to the allergic paw oedema was performed 15, 30, 60, 120, 180, 240 and 300min afier antigenic chaIlenge with OVA. In the non allergic paw oedema procedure the measure was performed 60, 120, 180, 240 and 300min afier induction by carrageenan and 15,30,60, 120 and 180minfor C48/80. The results showed not significant difference between the stressed and non stressed groups in the experiments that evaluated the profile of the cellular migration (BAL and pleurisy). Already, the edematogenic response was exacerbated to the stressed rats in comparison to the non stressed in the paw oedema induced by OVA and carrageenan, but not in the rats that received C48/80, suggesting that this phenomenon is not mediated by the histamine released by mast cells.

ASSUNTO(S)

edema asma pleurisia

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