Immunohistochemical expression and distribution of orexin, orphanin and leptin in the major salivary glands of some mammals

Angelo Leone, Giovanni Francesco Spatola, Daniela Cucco, Vincenzo Tessitore, Giuseppe Bonaventura, Maria Laura Uzzo
2012 Folia Histochemica et Cytobiologica  
The aim of the study was to determine by immunochemistry the expression of leptin, orexin A and orphanin FQ in the major salivary glands (parotid, submandibular and sublingual) of rat, sheep and cow. These peptides, originally synthesized in central nervous system, adipose tissue and peripheral tissues including gastrointestinal tract, play an orexigenic (orphanin and orexin) or anorexigenic (leptin) roles in the intricate neuronal network appointed to the control of nutritional homeostasis.
more » ... nal homeostasis. Peptide-specific immunoreactivity was present in the studied salivary glands with various intensities in different species, in the ductal epithelium, sometimes in the acinar epithelium, and in nervous trunks spread in connective tissue stroma. The obtained data show that salivary glands present an unexpected source of orexigenic and anorexigenic peptides which with their autocrine, paracrine, and endocrine mechanisms of action may participate in the control of salivary gland function.
doi:10.5603/fhc.2012.0071 fatcat:6megqbdz7rcvdj7iajvalizzgm