... of endogenous NO production using l -NAME suppressed the hypoventilatory response to hyperoxia, supporting an inhibitory role of NO in adult zebrafish. Neuroepithelial cells (NECs), the putative oxygen chemoreceptors of fish, contain neuronal nitric oxide synthase (nNOS). In zebrafish larvae at 4 days post...

... is thought to be detected via neuroepithelial cells (NECs), which are homologous to mammalian carotid body glomus cells. Larvae at 5 days post-fertilization (d.p.f.) exhibited tachycardia when exposed for 30 min to 0.75% CO 2 (~5.63 mmHg); at 7 d.p.f., tachycardia was elicited by 0.5% CO 2 (~3.75 mmHg...

... environmental ammonia [HEA, 250 μmol l –1 (NH 4 ) 2 SO 4 ] in the water, and whether gill neuroepithelial cells (NECs) are involved in ammonia sensing. Hyperventilation was induced both by acute external (NH 4 ) 2 SO 4 exposure [250 or 500 μmol l –1 (NH 4 ) 2 SO 4 ] and by intra-arterial (NH 4 ) 2 SO 4...

...Kelly S. Regan; Michael G. Jonz; Patricia A. Wright SUMMARY Teleost fish have oxygen-sensitive neuroepithelial cells (NECs) in the gills that appear to mediate physiological responses to hypoxia, but little is known about oxygen sensing in amphibious fish. The mangrove rivulus, Kryptolebias...

... conceivably could lead to a covering of the neuroepithelial cells (NECs), which are believed to be important for sensing ambient O 2 and CO 2 levels. In this study we tested the hypothesis that goldfish with covered lamellae (and presumably fewer NECs exposed to the water) exhibit a decreased capacity...

... against neuronal markers, have recently led to the characterization of innervation patterns in the gills not attained with traditional techniques of histochemistry and electron microscopy. We will discuss the association of putative sensory nerve fibres with O 2 -chemoreceptive neuroepithelial cells...

... O 2 chemoreceptors, the numbers of neuroepithelial cells (NECs) of the gill filament were quantified using confocal immunofluorescence microscopy. Consistent with the blunting of reflex ventilatory responses, fish exposed to chronic hyperoxia exhibited a significant decrease in the density of NECs...