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Biomechanical properties of retinal glial cells: Comparative and developmental data
- Source :
- Experimental Eye Research. 113:60-65
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- The biomechanical properties of Müller glial cells may have importance in understanding the retinal tissue alterations after retinal surgery with removal of the inner limiting membrane and during the ontogenetic development, respectively. Here, we compared the viscoelastic properties of Müller cells from man and monkey as well as from different postnatal developmental stages of the rat. We determined the complex Young's modulus E = E' + iE″ in a defined range of deforming frequencies (30, 100, and 200 Hz) using a scanning force microscope, where the real part E' reflects the elastic property (energy storage or elastic stiffness) and the imaginary part E″ reflects the viscous property (energy dissipation) of the cells. The viscoelastic properties were similar in Müller cells from man, monkey, and rat. In general, the elastic behavior dominated over the viscous behavior (E'E″). The inner process of the Müller cell was the softest region, the soma the stiffest (Einnerprocess(')Eendfoot(')Esoma(')). Neuronal somata were stiffer than somata of glial cells (Eneuron(')Eglia(')). These relations were also observed during the postnatal development of the rat. It is concluded that, generally, retinal cells display mechanics of elastic solids. In addition, the data indicate that the rodent retina is a reliable model to investigate retinal mechanics and tissue alterations after retinal surgery. During retinal development, neuronal branching and synaptogenesis might be particularly stimulated by the viscoelastic properties of Müller cell processes in the inner plexiform layer.
- Subjects :
- Synaptogenesis
Young's modulus
Biology
Microscopy, Atomic Force
Viscoelasticity
Cellular and Molecular Neuroscience
chemistry.chemical_compound
symbols.namesake
medicine
Animals
Humans
Rats, Long-Evans
Retina
Viscosity
Retinal
Inner limiting membrane
Middle Aged
Inner plexiform layer
Sensory Systems
Biomechanical Phenomena
Rats
Vitreous Body
Macaca fascicularis
Ophthalmology
medicine.anatomical_structure
chemistry
symbols
Biophysics
Female
Soma
sense organs
Neuroglia
Neuroscience
Retinal Neurons
Subjects
Details
- ISSN :
- 00144835
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- Experimental Eye Research
- Accession number :
- edsair.doi.dedup.....541790871f5da06c95a98696f36f379c