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Sirt1 involvement in rd10 mouse retinal degeneration
Carolina Jaliffa1, Ilhame Ameqrane, Anouk Dansault
1Université Paris-Descartes, Faculté de Médecine Paris-Descartes-site Necker, EA 2502 CERTO (Center de Recherches Thérapeutiques en Ophtalmologie), AP-HP (Assistance Publique-Hôpitaux de Paris), Paris, France.
Investigative Ophthalmology & Visual Science
|May 2, 2009
Summary
Sirtuin1 (Sirt1) plays a role in retinal degeneration in rd10 mice. Its neuroprotective properties may decline, suggesting a link between Sirt1 and retinitis pigmentosa progression.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Sirtuin1 (Sirt1) is a key NAD(+)-dependent deacetylase involved in cellular processes including energy metabolism, stress resistance, and aging.
- Sirt1 is expressed in the mammalian central nervous system and is activated during neuroprotective processes.
Purpose of the Study:
- To investigate the role of Sirtuin1 (Sirt1) in the retinal degeneration 10 (rd10) mouse model of retinitis pigmentosa (RP).
Main Methods:
- Detection of Sirt1 mRNA and protein in control and rd10 mouse eyes using in situ hybridization, RT-PCR, immunohistofluorescence, and Western blot.
- Analysis of photoreceptor cell apoptosis via TUNEL assay and immunolabeling for apoptosis-related factors.
Main Results:
- Sirt1 mRNA and immunoreactivity were detected in normal adult mouse retinas, primarily localized to the nucleus.
- Altered Sirt1 immunolabeling patterns were observed in the outer nuclear layer of rd10 mice, correlating with the onset of retinal degeneration.
Conclusions:
- A correlation exists between Sirt1 production and retinal degeneration in rd10 mice.
- Sirt1 exhibits anti-apoptotic and neuroprotective effects in the mouse retina, potentially through DNA repair and energy homeostasis maintenance.
- The neuroprotective capacity of Sirt1 may diminish in photoreceptor cells of rd10 mice during disease progression.
