DISTRIBUTION AND MORPHOLOGICAL FEATURES OF NICOTINAMIDE ADENINE-DINUCLEOTIDE PHOSPHATE DIAPHORASE (NADPH-D) ACTIVITY IN INTRINSIC NEURONS OF THE ODDI SPHINCTER OF THE CAT
E. Feher et C. Montagnese, DISTRIBUTION AND MORPHOLOGICAL FEATURES OF NICOTINAMIDE ADENINE-DINUCLEOTIDE PHOSPHATE DIAPHORASE (NADPH-D) ACTIVITY IN INTRINSIC NEURONS OF THE ODDI SPHINCTER OF THE CAT, Neuroscience letters, 170(1), 1994, pp. 114-116
To clarify the role of nitric oxide (NO) in the sphincter of Oddi, we
histochemically investigated the distribution of nicotinamide adenine
dinucleotide phosphate-diaphorase (NADPH-d), a marker for NO synthase,
in the cat. NADPH-diaphorase activity was localized in two neuronal s
ubtypes: large neurons with many dendrites and smaller with one proces
s. Most of the nerve cell bodies (99%) in the wall of the sphincter of
Oddi showed strong activity for this enzyme, The nerve fibers with NA
DPH-d activity were observed in all layers, chiefly in the muscle laye
rs. These results suggest that NO may play a very important role in th
e neuronal regulation of sphincter of Oddi.