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Verfasst von:Syrbe, Steffen [VerfasserIn]   i
 Gärtner, Ulrich [VerfasserIn]   i
Titel:Müller glial cells of the primate foveola
Titelzusatz:an electron microscopical study
Verf.angabe:Steffen Syrbe, Heidrun Kuhrt, Ulrich Gärtner, Gunnar Habermann, Peter Wiedemann, Andreas Bringmann, Andreas Reichenbach
Jahr:2018
Jahr des Originals:2017
Umfang:8 S.
Fussnoten:Available online: 11 December 2017 ; Gesehen am 22.06.2018
Titel Quelle:Enthalten in: Experimental eye research
Ort Quelle:Amsterdam [u.a.] : Elsevier, 1962
Jahr Quelle:2018
Band/Heft Quelle:167(2018), Seite 110-117
ISSN Quelle:1096-0007
Abstract:Previous studies on the ultrastructure of the primate foveola suggested the presence of an inverted cone-like structure which is formed by 25-35 specialized Müller cells overlying the area of high photoreceptor density. We investigated the ultrastructure of the Müller cells in the foveola of a human and macaque retina. Sections through the posterior poles of an eye of a 40 years-old human donor and an eye of an adult cynomolgus monkey (Macaca fascicularis) were investigated with transmission electron microscopy. The foveola consisted of an inner layer (thickness, 5.5-12 μm) which mainly contained somata (including nuclei) and inner processes of Müller cells; this layer overlaid the central Henle fibers and outer nuclear layer. The inner layer contained numerous watery cysts and thin lamelliform and tubular Müller cell processes which spread along the inner limiting membrane (ILM). The cytoplasm of the outer Müller cell processes became increasingly dispersed and electron-lucent in the course towards the outer limiting membrane. The ILM of the foveola was formed by a very thin basal lamina (thickness, <40 nm) while the basal lamina of the parafovea was thick (0.9-1 μm). The data show that there are various conspicuous features of foveolar Müller cells. The numerous thin Müller cell processes below the ILM may smooth the inner surface of the foveola (to minimize image distortion resulting from varying light refraction angles at an uneven retinal surface), create additional barriers to the vitreous cavity (compensating the thinness of the ILM), and provide mechanical stability to the tissue. The decreasing density of the outer process cytoplasm may support the optical function of the foveola.
DOI:doi:10.1016/j.exer.2017.12.004
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: http://dx.doi.org/10.1016/j.exer.2017.12.004
 Volltext: http://www.sciencedirect.com/science/article/pii/S0014483517307431
 DOI: https://doi.org/10.1016/j.exer.2017.12.004
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Fovea
 Human
 Müller cell
 Primate
 Ultrastructure
K10plus-PPN:1576762092
Verknüpfungen:→ Zeitschrift

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