Light Damage Model
Light Damage Model - Related Videos
09:31
A Novel Light Damage Paradigm for Use in Retinal Regeneration Studies in Adult Zebrafish
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Cited by 19 •
2013
Multiple light damage protocols have been described to damage photoreceptors and consequently induce a retinal regeneration response in adult zebrafish. This protocol describes an improved method that can be used in pigmented animals and that damages the vast majority of rod and cone photoreceptors across the entire retina.
06:38
Simultaneous 3D Analysis of Cardiac Damage and Immune Response in Reperfused Acute Myocardial Infarction Using Light Sheet Fluorescence Microscopy
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2025
Three-dimensional (3D) reconstruction of cardiac damage in reperfused acute myocardial infarction (repAMI) enables faithful quantification and co-localization of associated disease-affecting patterns. Here, an automatable light sheet-guided imaging approach is provided for contemporaneous measurement of cardiac damage, area at risk, and immune cell response.
02:01
Fluorescein Staining in an Autoimmune Dry Eye Rat Model to Examine Corneal Damage
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2025
This video demonstrates the staining of the damaged cornea using fluorescein dye to evaluate the extent of autoimmune dry eye disease in a rat model. The green fluorescence spots of the stained collagen fibers indicate corneal epithelial damaged cells.
06:43
Imaging Brain Damage Induced by Cerebral Hypoxia-Ischemia in a Mouse Model
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2025
Source: Ouyang, Y., et al. Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia. J. Vis. Exp. (2015)This video demonstrates a technique to assess cerebral hypoxia injury via simultaneous positron-emission tomography (PET) and magnetic resonance imaging (MRI). An anesthetized mouse undergoes common carotid artery (CCA) ligation, reducing blood flow to one brain hemisphere and predisposing it to hypoxia-induced injury. PET and MRI imaging evaluate glucose metabolism and structural...
10:55
Study of the DNA Damage Checkpoint using Xenopus Egg Extracts
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Cited by 35 •
2012
Xenopus egg extract is a useful model system to investigate the DNA damage checkpoint. This protocol is for the preparation of Xenopus egg extracts and DNA damage checkpoint inducing reagents. These techniques are adaptable to a variety of DNA damaging approaches in the study of the DNA damage checkpoint signaling.
FAQs
Excessive illumination can impair photoreceptor function and elevate oxidative stress in both photoreceptors and retinal pigment epithelial cells. This stress provides a mechanistic link between light exposure and later neurodegenerative changes. By examining these cellular responses, investigators can distinguish functional disruption from downstream injury and assess which molecular pathways might be suitable targets for neuroprotection.
Photoreceptors and retinal pigment epithelial cells are important because both experience oxidative stress, but they represent different cellular components of the retina. Studying them together helps researchers determine whether injury is restricted to light-sensitive neurons or extends to epithelial tissue. That distinction can clarify how damage spreads across retinal cell types and contributes to tissue remodeling.
Inflammatory signaling can connect initial light-induced stress with broader retinal degeneration. Researchers examine it alongside neuronal survival, glial responses, and cell death rather than as an isolated endpoint. This integrated view helps reveal how inflammation relates to worsening tissue injury, while glial changes show how non-neuronal retinal cells respond to the damaging exposure.
The model connects a defined retinal insult with changes in neuronal survival, glial responses, cell death, and tissue remodeling. Researchers can use these outcomes to investigate molecular pathways associated with neurodegeneration and compare how retinal tissue responds under experimental conditions. This makes the system useful for linking cellular injury with broader mechanisms of retinal disease.
A study uses a controlled light exposure intended to produce retinal stress, with illumination intensity or duration serving as key experimental conditions. Investigators then examine consequences in photoreceptors, retinal pigment epithelial cells, neurons, glia, and retinal tissue. This framework allows exposure-related injury, cellular responses, and remodeling outcomes to be evaluated together.
The system supports preclinical evaluation by providing retinal injury and degeneration-related outcomes against which potential neuroprotective treatments can be assessed. Investigators can examine whether treatment-associated changes affect neuronal survival, glial responses, cell death, or tissue remodeling. These observations may also help identify molecular pathways relevant to retinal protection and disease mechanisms.
Findings from the model can help contextualize molecular pathways that may contribute to human retinal diseases such as age-related macular degeneration. Its neuroscience value comes from connecting oxidative stress, inflammatory signaling, neuronal survival, and tissue remodeling within retinal tissue. The model therefore provides mechanistic context for studying how cellular injury may relate to retinal neurodegeneration.