Related Experiment Video
Updated: May 23, 2026
10:32
Organotypic Retinal Explant Cultures from Macaque Monkey
Published on: August 24, 2022
Retinal photodamage mediated by all-trans-retinal
Tadao Maeda1, Marcin Golczak, Akiko Maeda
1Department of Ophthalmology and Visual Sciences, Case Western Reserve University, Cleveland, OH, USA.
Photochemistry and Photobiology
|March 21, 2012
Summary
Accumulation of all-trans-retinal (all-trans-RAL) causes light-induced retinal cell death. Understanding its clearance mechanisms is key to preventing retinal degenerative diseases.
Area of Science:
- Ophthalmology
- Cell Biology
- Biochemistry
Background:
- all-trans-retinal (all-trans-RAL) accumulation initiates retinal photodamage.
- Photodamage causes progressive retinal cell death from light exposure.
- This process is implicated in retinal dystrophies like Stargardt's disease and AMD.
Purpose of the Study:
- To discuss all-trans-RAL clearance mechanisms in photoreceptors.
- To explore molecular pathways of retinal photodamage.
- To review imaging technologies and therapeutic strategies for retinal photodamage.
Main Methods:
- Review of enzymatic reactions in the visual (retinoid) cycle.
- Analysis of ATP-binding cassette transporter 4 function.
- Examination of all-trans-retinol dehydrogenases in photoreceptor cells.
Main Results:
- Interrupted all-trans-RAL clearance leads to its toxic accumulation.
- Accumulated all-trans-RAL and its products cause retinal dystrophy.
- Sequential enzymatic reactions are crucial for clearing all-trans-RAL.
Conclusions:
- Understanding all-trans-RAL clearance is vital for preventing retinal photodamage.
- Novel therapeutic strategies targeting all-trans-RAL accumulation show promise.
- Advanced imaging technologies aid in monitoring retinal health.
Related Concept Videos
01:22Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
01:27Diabetic Retinopathy
DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
01:32The Retina
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.