Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Gustav A. Engbretson"'
Autor:
E. T. Brown, Barry E. Knox, Mohammad Haeri, J. C. Pan, Lingguang Cui, Yumiko Umino, Drew Everhart, T. H. Nguyen, A. S. Glenn, B. A. Frio, Eduardo Solessio, Robert B. Barlow, Maureen J. Charron, Gustav A. Engbretson, K. Cusato, R. Hafler
Publikováno v:
Proceedings of the National Academy of Sciences. 103:19541-19545
The retina is among the most metabolically active tissues in the body, requiring a constant supply of blood glucose to sustain function. We assessed the impact of low blood glucose on the vision of C57BL/6J mice rendered hypoglycemic by a null mutati
Autor:
Robert B. Barlow, Shobana S. Mani, Nicolás Cuenca, Barry E. Knox, Eduardo Solessio, Gustav A. Engbretson
Publikováno v:
The Journal of General Physiology
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)
The kinetics of activation and inactivation in the phototransduction pathway of developing Xenopus rods were studied. The gain of the activation steps in transduction (amplification) increased and photoresponses became more rapid as the rods matured
Autor:
Barry E. Knox, Gustav A. Engbretson, Leigh Whitaker, Shobana S. Mani, Suchitra Batni, Shiming Chen
Publikováno v:
Journal of Biological Chemistry. 276:36557-36565
To understand the mechanisms that control the cell-specific visual pigment gene transcription, the Xenopus rhodopsin 5' regulatory region has been characterized in vivo using transient transfection of Xenopus embryos and transgenesis. The principal c
Autor:
Gustav A. Engbretson, Eduardo Solessio
Publikováno v:
Nature. 364:442-445
Photoreceptors are the first in the chain of neurons that process visual information. In lateral eyes of vertebrates, light hyperpolarizes rod and cone photoreceptors that synapse onto bipolar and horizontal cells in the first synaptic layer of the r
Autor:
Paul J. Linser, Gustav A. Engbretson
Publikováno v:
Journal of Comparative Neurology. 314:799-806
The parietal eye of lizards is a relatively simple yet highly structured visual organ. Cone-like photoreceptors synapse directly onto ganglion cells that project to the brain. Golgi staining confirmed the existence of glial cells spanning the sensory
Publikováno v:
Journal of biomedical optics. 9(5)
Common confounding factors for polarimetric concentration measurements include additional optical rotations from unknown optically active molecules, linear birefringence of the medium, and path length variability. We show that by approximating Drude'
Autor:
Eduardo Solessio, Gustav A. Engbretson
Publikováno v:
Visual neuroscience. 16(5)
Local electroretinograms (ERGs) were recorded in the parietal eye of Xantusia vigilis. The responses to monochromatic light under dark- and light-adapted conditions were studied. We found that two antagonistic chromatic mechanisms dominate the overal
Autor:
Gustav A. Engbretson, Michael E. Zuber, Ilija Aleksic, Adam Coughlin, Georgette A. Jones, Rene Y. Choi, Eduardo Solessio
Publikováno v:
Investigative Opthalmology & Visual Science. 52:364
Amphibian retinas regenerate after injury, making them ideal for studying the mechanisms of retinal regeneration, but this leaves their value as models of retinal degeneration in question. The authors asked whether the initial cellular changes after
Autor:
Yumiko Umino, Eduardo Solessio, Robert B. Barlow, Barry E. Knox, Ellis R. Loew, David A. Cameron, Gustav A. Engbretson
Publikováno v:
Investigative Opthalmology & Visual Science. 50:4477
Vitamin A is the precursor to 11-cis retinal, the chromophore that binds to opsin to produce rhodopsin, the light-absorbing pigment.1 Without vitamin A, the amount of free opsin increases, leading to a loss in quantum catch and sensitivity that resem
Publikováno v:
Visual neuroscience. 5(4)
The cellular connectivity of the lacertilian parietal eye is not well understood. Because the intercellular connections establish the foundation for information processing, we have investigated cellular connectivity of one cell type in this simple ve