Immunohistochemical study of syntaxin-1 and snap-25 in the pituitaries of mouse, guinea pig and cat

In the present work we have investigated the presence of the membrane proteins Syntaxin-1 and synaptosomal-associated protein (SNAP-25) by immunohistochemistry in the different parts of the pituitary of mouse, guinea pig and cat. We have demostrated Syntaxin-1 and SNAP-25 immunoreactivity in the adenohypophysis as well as in the neurohypophysis but not in intermediate lobe. The results suggest that Syntaxin-1 and SNAP-25 are involved in the hormonal secretory process of adenohypophysis as well as neurohypophysis of these animals.