Rhinella arenarum OVIDUCTAL CALCIUM SECRETION

What is it about?

Results obtained in our laboratory showed that the jelly coat that surround the oocytes of Rhinella arenarum during the deposition, contain ionic calcium and that this cation participates actively in the process of fertilization. The aim of the present work was to analyze possible mechanisms of calcium storage and secretion, for which purpose it is proposed to identify and locate by immunohistochemistry the presence of Ca2 + pump, calmodulin and calbindin-D-28KD in the oviductal. Physiologically, the mechanism of transport and modulation of Ca2 + secreted by the oviductal mucosa was determined. Regulatory molecules of the intracellular concentration of the cation were identified. Taking these results together, a calcium storage and secretion mechanism (transcellular pathway) was proposed in the Pars Convoluta secretory cells, establishing their variations in the sexual cycle.

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