Results 211 to 220 of about 62,604 (264)

Recoverin negative photoreceptor cells

Journal of Neuroscience Research, 2000
Recoverin, a calcium-binding protein, is unique with respect to its cellular regulation. It is present in retinal rods, cones, cone bipolar cells, and in a rare population of cells in the ganglion cell layer. Inappropriate turn-on or turn-off of recoverin expression has been reported both in small cell lung carcinoma cells from patients with cancer ...
W, Cao, W, Chen, R, Elias, J F, McGinnis
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Fluorescence of Photoreceptor Cells Observed in Vivo

Science, 1981
Most rhabdomeres in the eye of the fly ( Musca domestica ) are fluorescent. One kind of fluorescent emission emanates from a photoproduct of the visual pigment, other kinds may be ascribed to photostable pigments. These phenomena provide not only a means of spectrally mapping the retina but also a new spectroscopic ...
Franceschini, N., Kirschfeld, K., Minke, B.   +2 more
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The Photoreceptor Cells

1984
Insect photoreceptor cells are usually slender, cylindrical, and aggregated into various species-specific combinations beneath the corneal lens of a compound eye, ocellus, or larval stemmata. Individual cells are so sensitive to light that some are able to signal catches of a single photon (e.g., Lillywhite, 1977). This exquisite sensitivity is founded
Stanley D. Carlson, Richard L. Saint Marie, Che Chi   +2 more
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Lamprey ganglion cells contact photoreceptor cells

Neuroscience Letters, 1998
Lamprey retinal ganglion cells are localized in two separate layers: those close to the vitreous and those at the junction between the inner nuclear and inner plexiform layers, including some others in the inner nuclear layer, close to the photoreceptor cell layer.
J P, Rio, N P, Vesselkin, J, Repérant, N B, Kenigfest, C, Versaux-Botteri   +4 more
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FUNCTIONAL ROLE OF CALCIUM IN PHOTORECEPTOR CELLS

Photochemistry and Photobiology, 1980
Abstract— Ca‐uptake by disc membranes prepared from frog rod photoreceptor outer segments was examined. Ca‐uptake study revealed two affinity sites which were saturated with 10–5M and 10–3M of ATP. When disc membranes in 20 mM Tris‐HCl buffer (pH 7.5) were stored at ‐20°C for 6 h, more than 95% of Ca‐uptake activity was lost.
N, Miki, C H, Kuo, Y, Hayashi, M, Akiyama   +3 more
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An electrical model of the vertebrate photoreceptor cell

Vision Research, 1967
Abstract An electrical model of the vertebrate photoreceptor cell is presented which accounts for the similar configuration and polarity of the intracellularty recorded photoreceptor potential (IPP) and the P III component of the electroretinogram. It is proposed that during illumination the outer segment actively hyperpolarizes causing current to ...
A, Bortoff, A L, Norton
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Transferrin is made and bound by photoreceptor cells

Journal of Cellular Physiology, 1993
AbstractRetinal pigment epithelial cells, which form one aspect of the blood‐retinal barrier, control the access of blood‐borne components such as diferric transferrin to the neural retina. It has recently been shown that RPE cells remove iron from diferric transferrin in a low pH compartment and subsequently release it in a low molecular weight form ...
A A, Davis, R C, Hunt
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Stimulated drug uptake in a photoreceptor cell

Neuroscience Letters, 1984
In many cells, organelle translocation requires structural integrity of microtubules [2,6,11,14, 5]. We have found that extracellular application of the antimicrotubular drug colchicine, which was expected to enter cells simply by diffusion, was ineffective at blocking pigment granule migration (PGM) inside fly photoreceptors.
M, Wilcox, N, Franceschini
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Presynaptic tubular structures in photoreceptor cells

Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1971
After the application of fixatives including phosphotungstic acid or a mixture of osmium tetroxide and zinc iodide, complex tubular structures are evident in the presynaptic side of the synapses between photoreceptor and bipolar cells of the rat's retina. In the first case only the limiting membranes are visualized, while in the second only the content
A P, De Iraldi, A M, Suburo
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Inflammation-Induced Photoreceptor Cell Death

2018
Neuroinflammation is an important aspect of many diseases of the eye, and experimental animal models have been widely used to determine its impact on retinal homeostasis and neuron survival. Physical separation of the neurosensory retina from the underlying retinal pigment epithelium (RPE) results in activation and infiltration of macrophages. Numerous
Abdoulaye, Sene, Rajendra S, Apte
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