COEXISTENCE OF GALANIN AND SUBSTANCE-P IN THE MOUSE NASAL-MUCOSA, INCLUDING THE VOMERONASAL ORGAN

Immunohistochemical fluorescent double labeling revealed the coexisten ce of galanin and substance P in nerve fibers in the mouse nasal mucos a. At the base of and in the epithelium, all galanin fibers also conta ined substance P, but around the blood vessels and glands, most of the m did not. Since substance P fibers in the nasal mucosa originate from the trigeminal ganglion, these results suggest that galanin fibers in the submucosal region originate from ganglia other than the trigemina l.