Selenite-induced Cataracts
Selenite-induced Cataracts - Related Videos
13:56
Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
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Cited by 4 •
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Cataract is the leading cause of blindness in the world. Solar ultraviolet radiation (UVR) is the main risk factor for cataract development. An animal model of far UVR-B induced cataract was developed. In this article we describe methods for investigation of cataract formation: exposure to UVR, quantitative RT-PCR and immunohistochemistry.
05:19
Modeling Cataract Surgery in Mice
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Cited by 3 •
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This method models cataract surgery in vivo by removing lens fiber cells from adult mice and leaving behind the capsular bag with attached lens epithelial cells (LECs). The injury response is then assessed at various times post-surgery using molecular and morphological criteria.
07:53
Establishment of a Clinically Relevant Ex Vivo Mock Cataract Surgery Model for Investigating Epithelial Wound Repair in a Native Microenvironment
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Cited by 13 •
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Described here is the establishment of a clinically relevant ex vivo mock cataract surgery model that can be used to investigate mechanisms of the injury response of epithelial tissues within their native microenvironment.
04:59
Rotating the Intraocular Lens to Prevent Posterior Capsular Opacification in Cataract Surgeries
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Cited by 1 •
2023
The present protocol describes removing residual epithelial cells by rotating the intraocular lens in extracapsular cataract surgery without extra tools for preventing posterior capsular opacification.
07:08
A Mouse Model for Laser-induced Choroidal Neovascularization
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Cited by 87 •
2015
Here, we present the mouse laser-induced choroidal neovascularization (CNV) protocol, an experimental model that re-creates the vascular hallmarks of neovascular age-related macular degeneration (AMD). Once mastered, it can reliably and effectively induce CNV as a model system to test various experimental measures.
FAQs
Oxidative stress and calcium dysregulation act as connected drivers rather than isolated findings. Sodium selenite promotes oxidative stress while disturbing calcium homeostasis in susceptible lenses. The resulting calcium imbalance activates calpain proteases, and these enzymes cleave crystallins. That sequence links a chemical insult to protein damage and explains how molecular changes can progress toward loss of lens transparency.
Calpain activation provides a mechanistic bridge between altered ion balance and structural damage. Once calcium homeostasis is disrupted, calpain proteases become active and cleave crystallins, with this protein damage contributing to impaired transparency. Measuring this pathway helps investigators determine whether an intervention acts on calcium regulation, protease activation, or the downstream breakdown of lens proteins.
The model is described as occurring in susceptible lenses, so susceptibility is a central experimental condition rather than a minor detail. It focuses experiments on lenses in which the chemical challenge can reveal the relevant biochemical cascade. This condition should be considered when interpreting how sodium selenite affects the lens and when comparing results across experimental preparations.
Crystallins are important readouts because sodium selenite-associated calcium disruption activates calpain proteases that cleave these proteins. Their cleavage marks a downstream consequence of earlier chemical and ionic disturbances, while the resulting protein damage is linked to impaired lens transparency. Tracking this event helps researchers connect biochemical injury with the visible cataract-related outcome.
Researchers can use the model in a controlled sequence: expose susceptible lenses to sodium selenite, examine cataract-related biochemical changes, and relate those findings to lens opacity or impaired transparency. Candidate antioxidant or anti-cataract strategies can then be evaluated within the same experimental system. This workflow connects chemical exposure, molecular injury, and potential treatment response.
Antioxidant or anti-cataract strategies are evaluated by asking whether they counter the injury pattern associated with sodium selenite exposure. Researchers can examine whether treatment preserves lens clarity or alters biochemical changes accompanying oxidative stress, calcium disruption, calpain activation, and crystallin cleavage. This makes the model useful for evaluating approaches aimed at preventing or limiting cataract formation.
Medicine and toxicology use Selenite-induced Cataracts to study how chemical stressors contribute to lens disease under controlled conditions. The model allows investigators to relate an experimental insult to oxidative stress, calcium dysregulation, protease activity, crystallin damage, and visual impairment. This context supports research on cataract mechanisms while keeping attention on both molecular events and their functional consequence.