Perfil analítico de estrógenos e progestinas em diferentes matrizes biológicas na espécie ovina (Ovis aires) / Analytic profile of estrogens and progestins in different biological matrixes in the ovine (Ovis aires)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The aim of the present work was evaluate the hormonal profiles of progestins and estrogens in blood, feces, urine and saliva during the induced estral cycle in ovine. Samples were collected daily a 60-day period from eight adult (n=8) cycling ewes. The animals were previously submitted to a protocol of estrus induction and synchronization for twelve days. In order to avoid the effect of exogenous hormones, the first cycle immediately after the synchronization was not considered for hormonal analysis. Progestagen concentrations were quantified by two analytical techniques, radioimmunoassay (RIA) and enzyme immunoassay (EIA). Estrogen concentrations were assessed by radioimmunoassay. Correlations in progesterone concentrations were found to be significant for serum and feces, serum and saliva and feces and saliva (r=0.90, p<0.0001; r=0.90, p<0.0001; r=0.92, p<0.0001, respectively) during the estrous cycles (n=15). Estrogen concentrations in the serum and feces were also positively correlated (r=0.74, p<0.0001). Salivary concentrations of estrogens were not correlated with fecal or serum concentrations of the same hormone. No correlation was found between urinary concentrations and concentrations found in other matrixes for both progestagens and estrogens. Concentrations of progestagens obtained using RIA and EIA were correlated on feces (r=0.78, p<0.0001) and saliva (r=0.81, p<0.0001). Results indicate that both immunoassays used in the present experiment can be used to evaluate progestagen concentrations on fecal and salivary matrixes during the estrous cycle of sheep.

ASSUNTO(S)

endocrinolgia esteróides ovinos steroids animals estrous cycle ovine imunoensaio immunoassay endocrinology ciclo estral animal

ACESSO AO ARTIGO

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