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Neural extracellular matrix regulates visual sensory motor integration
Jacqueline Reinhard1, Cornelius Mueller-Buehl1, Susanne Wiemann1
1Department of Cell Morphology and Molecular Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, 44780 Bochum, Germany.
Iscience
|February 6, 2024
Summary
The absence of four extracellular matrix proteins severely impairs retinal function and visual motion processing in mice. This dysfunction is linked to the loss of specific retinal cells and imbalanced synaptic signaling.
Area of Science:
- Neuroscience
- Ophthalmology
- Cell Biology
Background:
- Extracellular matrix proteins regulate synaptogenesis and synaptic plasticity.
- Proper synaptic function is crucial for visual processing.
Purpose of the Study:
- To investigate the role of four specific extracellular matrix proteins (brevican, neurocan, tenascin-C, and tenascin-R) in retinal function and visual processing.
- To examine the impact of their combined absence on visual motion perception and retinal cell development.
Main Methods:
- Utilized quadruple knockout mice lacking brevican, neurocan, tenascin-C, and tenascin-R.
- Assessed retinal function and visual motion processing in vivo.
- Analyzed the development of cholinergic direction-selective starburst amacrine cells and synaptic signaling balance.
Main Results:
- Quadruple knockout mice exhibited severe retinal dysfunction and diminished visual motion processing.
- A developmental loss of cholinergic starburst amacrine cells was observed.
- An imbalance between inhibitory and excitatory synaptic signaling was noted in the knockout retina.
Conclusions:
- The four studied extracellular matrix proteins are essential for normal retinal function and visual motion processing.
- Their absence disrupts critical retinal cell populations and synaptic balance.
- This highlights the functional importance of these ECM proteins in the visual system.
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