An international team of researchers has found via clinical trial that the drug pegcetacoplan may slow the onset of age-related macular degeneration in some people. In their paper published in JAMA Ophthalmology, the group ...
Temporary loss of smell, or anosmia, is the main neurological symptom and one of the earliest and most commonly reported indicators of COVID-19. Studies suggest it better predicts the disease than other well-known symptoms ...
Jul 24, 2020
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Sickle cell anemia causes pain, fatigue and delayed growth, all because of a lack of enough healthy red blood cells. And yet genetic mutations that cause it - recessive genes for the oxygen-carrying hemoglobin protein - have ...
Nov 30, 2011
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Researchers from the National Eye Institute (NEI) have identified a new disease that affects the macula, a small part of the light-sensing retina needed for sharp, central vision. Scientists report their findings on the novel ...
Jun 9, 2022
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Researchers in China have successfully restored the vision of mice with retinitis pigmentosa, one of the major causes of blindness in humans. The study, to be published March 17 in the Journal of Experimental Medicine, uses ...
Mar 17, 2023
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As we age, so do our eyes; most commonly, this involves changes to our vision and new glasses, but there are more severe forms of age-related eye problems. One of these is age-related macular degeneration, which affects the ...
Jun 14, 2022
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The reason some people fail to recover their sense of smell after COVID-19 is linked to an ongoing immune assault on olfactory nerve cells and an associated decline in the number of those cells, a team of scientists led by ...
Dec 21, 2022
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The survival and fitness of multicellular organisms is tightly associated with their capacity to renew their tissues. This is particularly important for tissues that are permanently exposed to and challenged by the external ...
Jun 4, 2019
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Doctors have reported that partial or total loss of the sense of smell is often an early symptom of infection with SARS-CoV-2, the virus that causes COVID-19. Now, researchers reporting in ACS Chemical Neuroscience have shown ...
May 11, 2020
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Researchers at Oregon State University have discovered that antibiotics have an impact on the microorganisms that live in an animal's gut that's more broad and complex than previously known.
Feb 10, 2015
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Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. Epithelial tissues line the cavities and surfaces of structures throughout the body, and also form many glands. Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport and detection of sensation. In Greek "Epi" means, "on, upon," and "Theli" meaning "tissue." Epithelial layers are avascular, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.[unreliable source?] Epithelia can also be organized into clusters of cells that function as exocrine and endocrine glands. Exocrine and endocrine epithelial cells are highly vascular.
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