Results 251 to 260 of about 4,871,943 (300)

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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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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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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Vertebrate photoreceptor cell development and disease

Trends in Cell Biology, 1998
Photoreceptors provide an excellent model for studies of vertebrate neuronal differentiation, and many human diseases resulting in blindness primarily affect photoreceptors. There is therefore great interest in studying the cellular and molecular mechanisms of photoreceptor development.
E M, Morrow, T, Furukawa, C L, Cepko
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TRP, TRPL and trouble in photoreceptor cells

Current Opinion in Neurobiology, 1998
Calcium influx through the TRP and TRPL light-activated channels triggers a complex regulatory hierarchy resulting in positive and negative feedback regulation of the phototransduction cascade. Recent studies have begun to elucidate the function of TRP and TRPL in vivo, and to examine their relationship to intracellular calcium changes during the light
K, Scott, C, Zuker
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Calcium Homeostasis in Fly Photoreceptor Cells

2002
In fly photoreceptor cells, two processes dominate the Ca2+ homeostasis: light-induced Ca2+ influx through members of the TRP family of ion channels, and Ca2+ extrusion by Na+/Ca2+ exchange. Ca2+ release from intracellular stores is quantitatively insignificant.
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Ca2+ Signaling in Drosophila Photoreceptor Cells

2019
In Drosophila photoreceptor cells, Ca2+ exerts regulatory functions that control the shape, duration, and amplitude of the light response. Ca2+ also orchestrates light adaptation allowing Drosophila to see in light intensity regimes that span several orders of magnitude ranging from single photons to bright sunlight. The prime source for Ca2+ elevation
Olaf, Voolstra, Armin, Huber
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Peroxynitrite-induced apoptosis in photoreceptor cells

Current Eye Research, 2004
To study the mechanisms of peroxynitrite-induced photoreceptor cell damage, using retinal cultures and a peroxynitrite donor, 3-morpholinosydnonimine (SIN-1).Retinal explants obtained from 20-day-old Lewis rat pups, were exposed to SIN-1 for varying lengths of time at varying concentrations.
Shinji, Ito, Guey-Shuang, Wu, Takashi, Kimoto, Toshio, Hisatomi, Tatsuro, Ishibashi, Narsing A, Rao   +5 more
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Evolution of eyes and photoreceptor cell types

The International Journal of Developmental Biology, 2003
The evolution of the eye is a matter of debate ever since Darwin's Origin of Species. While morphological comparisons of eye anatomy and photoreceptor cell types led to the view that animal eyes evolved multiple times independently, the molecular conservation of the pax6 eye-specifying cascade has indicated the contrary - that animal eyes evolved from ...
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Properties of barnacle photoreceptor cells in culture

Comparative Biochemistry and Physiology Part A: Physiology, 1989
1. Properties of median photoreceptor cells in cultured ocelli from the giant barnacle (Balanus nubilus) were compared in isolated ocelli, ocelli maintained with the supraesophageal ganglion, and fresh ocelli. 2. Cultured photoreceptor cells exhibited slight deterioration after 2-4 weeks.
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