Changes in NADPH diaphorase reactivity and neuronal nitric oxide synthase in the rat retina following constant illumination.
The distribution of nicotinamide adenine dinucleotide phosphate diaphorase (NADPHd) reactivity and neuronal nitric oxide synthase immunoreactivity (nNOS-IR) was investigated in the rat retina during photoreceptor regeneration. Photoreceptor damage and the disappearance of a NADPHd reactive/nNOS-IR band corresponding to inner photoreceptor segments were observed after continuous exposure to light irradiation. Both events were reversible after 20 days of total darkness. Also a progressive decrease in the number and in the staining intensity of NADPHd reactivity in amacrine cells were found along the first 3-6 days of darkness stabilizing thereafter in both illuminated and control groups. However, staining intensity in the former group remained more elevated than in the latter one. NOS activity in the retina varies depending on functional and pathological states.
Goldstein
J
J
Instituto de Biología Celular y Neurociencia Dr. Eduardo De Robertis, Facultad de Medicina, UBA, Buenos Aires, Argentina.
López-Costa
J J
JJ
Saavedra
J P
JP
D000221:Adaptation, Ocular / Q000502:physiology*; D000818:Animals; D003623:Dark Adaptation / Q000502:physiology; D007150:Immunohistochemistry; D009252:NADPH Dehydrogenase / Q000032:analysis / Q000378:metabolism*; D019001:Nitric Oxide Synthase / Q000032:analysis / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012165:Retinal Ganglion Cells / Q000201:enzymology*
D019001:Nitric Oxide Synthase; D009252:NADPH Dehydrogenase