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pigment epithelium

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pigment epithelium [‚pig·mənt ‚ep·ə′thē·lē·əm]
(histology)
A heavily pigmented layer of epithelial cells interposed between the photoreceptors of the vertebrate retina and their blood supply, the choroid. It forms a barrier regulating the exchange of fluids and substances between the blood and outer layer of the retina; it also plays a number of roles in support of photoreceptor structure and function in vertebrates.
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Advanced Cell has used human embryonic stem cells to generate retinal pigment epithelium cells, a type of cell in the retina of the eye.
MONEY BRIEFS by Telegram & Gazette (Worcester, MA)
It works by replacing lost retinal cells -- called retinal pigment epithelium (RPE) -- which maintain the photoreceptors needed for vision.
Embryonic stem cell therapy closer to human trials by AFP / AFP Global Edition
After exposure to light, key components of pigments called chromophores can leave the cells and travel to the nearby pigment epithelium near the retina.
Mechanism that helps us see in bright and low light discovered by Asian News International
 
 
 
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