Sensibilidade as catecolaminas dos atrios direitos das ratas : influencia das fases do ciclo estral e do "stress"

AUTOR(ES)

Monica Luiza Viegas Rodrigues

DATA DE PUBLICAÇÃO

1993

RESUMO

The purpose of this work was to analyse the female rat right atria sensitivity to the chronotropic effect of isoprenaline, noradrenaline and adrenaline, along the oestrous cycle phases and after stress applied during oestrous or dioestrous. We also correlated changes in sensitivity with oestrous cycle phases and/or plasmatic levels of corticosterone. Female adult Wistar rats were used. The phases of oestrous cycle were determined daily at 9:00 - 10:00 a.m. by means of vaginal smear. Those animals constituting the stressed groups were submitted to a 50 minute swimming session in water at 35ºC, during oestrous or dioestrous. Isolated spontaneous beating right atria were used to obtain cumulative dose-reponse curves to noradrenaline, isoprenaline and adrenaline. Some experiments were performed after in vitro denervation and inhibition of neuronal and extraneuronal uptake Corticosterone plasmatic levels were determined fluorimetricly. Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

stress (fisiologia) rato como animal de laboratorio adrenalina

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