INMUNOCYTOCHEMICAL AND ULTRASTRUCTURAL STUDY OF TSH CELLS OF GOAT (<i>CAPRA HIRCUS</i>) IN ANOESTRUS, GESTATION AND MILK PRODUCTION
Abstract
It has been studied the structural and ultrastructural characteristics of adenohypophiseal TSH cells of goats in anoestrus, gestation and milk production. TSH cells have been identified using staining and histochemical methods and immunocytochemical techniques (PAP). This allows studies of cellular size and shape and secretory granules with a semi-automatic image analyzer (IBAS 1). TSH cells are the less abundant in the adenohypophysis and are sized 13,8 µm in diameter in anoestrus. They increase in number during gestation and during milk production decrease in size. They show small secretory granules (146-159 nm) mostly located at the periphery of the cytoplasm. The granular endoplasmicum reticulum is found forming narrow cisternae which become widened during gestation, and above all, during milk production. In this last stage there is a decrease in the number of granules frequently surrounded by a clear halo which separates the content from the membraneDownloads
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