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Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina

We present unique ultrastructural data on avian retinal cells. Presently and earlier (Zueva et al., 2016) we explored distribution of intermediate filaments (IFs) in retinal cells of the Pied flycatcher (Ficedula hypoleuca, Passeriformes, Aves) in the central foveolar zone. This retinal zone only co...

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Autores principales: Zueva, Lidia, Golubeva, Tatiana, Korneeva, Elena, Resto, Oscar, Inyushin, Mikhail, Khmelinskii, Igor, Makarov, Vladimir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7298408/
https://www.ncbi.nlm.nih.gov/pubmed/32566783
http://dx.doi.org/10.1016/j.heliyon.2020.e04146
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author Zueva, Lidia
Golubeva, Tatiana
Korneeva, Elena
Resto, Oscar
Inyushin, Mikhail
Khmelinskii, Igor
Makarov, Vladimir
author_facet Zueva, Lidia
Golubeva, Tatiana
Korneeva, Elena
Resto, Oscar
Inyushin, Mikhail
Khmelinskii, Igor
Makarov, Vladimir
author_sort Zueva, Lidia
collection PubMed
description We present unique ultrastructural data on avian retinal cells. Presently and earlier (Zueva et al., 2016) we explored distribution of intermediate filaments (IFs) in retinal cells of the Pied flycatcher (Ficedula hypoleuca, Passeriformes, Aves) in the central foveolar zone. This retinal zone only contains single and double cone photoreceptors. Previously we found that continuous IFs span Müller cells (MC) lengthwise from the retinal inner limiting membrane (ILM) layer up to the outer limiting membrane (OLM) layer. Here we describe long cylindrical bundles of IFs (IFBs) inside the cone inner segments (CIS) adjoining the cone plasma membrane, with these IFBs following along the cone lengthwise, and surrounding the cone at equal spacing one from the other. Double cones form a combined unit, wherein they are separated by their respective plasma membranes. Double cones thus have a common external ring of IFBs, surrounding both cone components. In the layer of cilia, the IFBs that continue into the cone outer segment (COS) follow on to the cone apical tip along the direction of incident light, with single IFs separating from the IFB, touching, and sometimes passing in-between the light-sensitive lamellae of the COS. These new data support our previous hypothesis on the quantum mechanism of light energy propagation through the vertebrate retina (Zueva et al., 2016, 2019).
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spelling pubmed-72984082020-06-19 Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina Zueva, Lidia Golubeva, Tatiana Korneeva, Elena Resto, Oscar Inyushin, Mikhail Khmelinskii, Igor Makarov, Vladimir Heliyon Article We present unique ultrastructural data on avian retinal cells. Presently and earlier (Zueva et al., 2016) we explored distribution of intermediate filaments (IFs) in retinal cells of the Pied flycatcher (Ficedula hypoleuca, Passeriformes, Aves) in the central foveolar zone. This retinal zone only contains single and double cone photoreceptors. Previously we found that continuous IFs span Müller cells (MC) lengthwise from the retinal inner limiting membrane (ILM) layer up to the outer limiting membrane (OLM) layer. Here we describe long cylindrical bundles of IFs (IFBs) inside the cone inner segments (CIS) adjoining the cone plasma membrane, with these IFBs following along the cone lengthwise, and surrounding the cone at equal spacing one from the other. Double cones form a combined unit, wherein they are separated by their respective plasma membranes. Double cones thus have a common external ring of IFBs, surrounding both cone components. In the layer of cilia, the IFBs that continue into the cone outer segment (COS) follow on to the cone apical tip along the direction of incident light, with single IFs separating from the IFB, touching, and sometimes passing in-between the light-sensitive lamellae of the COS. These new data support our previous hypothesis on the quantum mechanism of light energy propagation through the vertebrate retina (Zueva et al., 2016, 2019). Elsevier 2020-06-10 /pmc/articles/PMC7298408/ /pubmed/32566783 http://dx.doi.org/10.1016/j.heliyon.2020.e04146 Text en http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Zueva, Lidia
Golubeva, Tatiana
Korneeva, Elena
Resto, Oscar
Inyushin, Mikhail
Khmelinskii, Igor
Makarov, Vladimir
Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina
title Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina
title_full Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina
title_fullStr Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina
title_full_unstemmed Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina
title_short Electron microscopy study of the central retinal fovea in Pied flycatcher: evidence of a mechanism of light energy transmission through the retina
title_sort electron microscopy study of the central retinal fovea in pied flycatcher: evidence of a mechanism of light energy transmission through the retina
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7298408/
https://www.ncbi.nlm.nih.gov/pubmed/32566783
http://dx.doi.org/10.1016/j.heliyon.2020.e04146
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