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Published on: August 29, 2018
Localization of Ceramide Synthase 5 in Mouse Retina
Soo-Jin Song1, Jae-Hyun Koo1, Hee-Yeon Kim2
1Department of Anatomy, Ewha Womans University College of Medicine, Seoul, South Korea.
The Journal of Comparative Neurology
|July 24, 2026
Summary
Ceramide synthase 5 (CerS5) is present in mouse retinal cells, contributing to retinal structure. However, its absence in CerS5 knockout mice did not significantly alter retinal function, suggesting compensatory mechanisms.
Area of Science:
- Biochemistry
- Cell Biology
- Neuroscience
Background:
- Ceramide synthases (CerS) are crucial for sphingolipid metabolism, impacting cellular processes.
- CerS5 specifically synthesizes C16-ceramide, but its role in the retina is unknown.
Purpose of the Study:
- Investigate CerS5 expression, localization, and functional significance in the mouse retina.
- Utilize CerS5 knockout (KO) mice to assess its impact on retinal structure and function.
Main Methods:
- Quantitative PCR, X-gal staining, and immunohistochemistry for expression and localization analysis.
- Electroretinography (ERG) to evaluate retinal function in CerS5 KO mice.
- Analysis of retinal structure in CerS5 KO mice compared to wild-type.
Main Results:
- CerS5 is localized in the inner nuclear and ganglion cell layers, co-localizing with specific retinal cell types.
- CerS5 KO mice exhibited reduced overall retinal thickness, with thinning in most layers but thickening of the outer plexiform layer.
- Despite structural changes, ERG recordings showed no significant functional impairment in CerS5 KO retinas.
Conclusions:
- CerS5 plays a role in maintaining retinal structural integrity through its presence in specific retinal cells.
- Loss of CerS5 does not significantly impair retinal function in adult mice, indicating potential compensatory pathways.
- Observed structural alterations suggest CerS5's involvement in retinal physiology and potential implications for pathophysiology.
