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Diabetes alters neurite regeneration from mouse retinal explants in culture
1Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Japan. takanom@med.yokohama-cu.ac.jp
Abstract:
We examined the effect of experimental diabetes on neurite regeneration from adult mouse retinal explants cultured in the presence of different concentrations of glucose. The numbers of regenerating neurites at 3, 6 and 10 days in culture at normal glucose concentration (7 mM) were significantly smaller in streptozotocin-induced diabetic C57BL/6 mice than in normal control mice. In contrast, treatment of retinal explants with high glucose concentration (57 mM) significantly diminished the number of regenerating neurites in the control mice, but not in the diabetic mice. These results suggest that retina in diabetic mice has impaired capability of neurite regeneration in a normal glucose environment, but is adaptable to a high glucose environment in vitro.
Insights
Experimental diabetes impairs neurite regeneration in mouse retinas. Diabetic retinas show reduced regeneration in normal glucose but adapt to high glucose conditions in vitro.
Area of Science:
- Neuroscience
- Ophthalmology
- Diabetology
Background:
- Diabetes mellitus is a systemic disease with significant ocular complications.
- Diabetic retinopathy is a leading cause of vision loss, affecting retinal neurons.
- Neurite regeneration is crucial for neural repair and maintaining visual function.
Purpose of the Study:
- To investigate the impact of experimental diabetes on neurite regeneration in adult mouse retinal explants.
- To assess the response of diabetic and control retinal explants to varying glucose concentrations in vitro.
Main Methods:
- Adult C57BL/6 mice were induced with experimental diabetes using streptozotocin.
- Retinal explants were cultured in media with normal (7 mM) and high (57 mM) glucose concentrations.
- Neurite regeneration was quantified at 3, 6, and 10 days post-culture.
Main Results:
- Diabetic mouse retinal explants showed significantly fewer regenerating neurites in normal glucose compared to controls.
- High glucose (57 mM) significantly reduced neurite regeneration in control explants.
- Diabetic retinal explants did not show a significant reduction in neurite regeneration in high glucose compared to their normal glucose counterparts.
Conclusions:
- Experimental diabetes impairs the intrinsic capability of retinal neurite regeneration in a normal glucose environment.
- Retinal explants from diabetic mice demonstrate an adaptation to high glucose conditions in vitro, suggesting altered metabolic or signaling pathways.