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Latest Photoreceptor cells Stories

2011-06-09 23:25:37

Biologists have uncovered a key regulatory mechanism used for gene expression in the visual system. Their findings, which appear in the latest issue of the journal Cell, offer new insights into the complexity behind the genetic make-up of biological systems. The study, which included researchers from New York University's Department of Biology, Japan's Okayama University, Cincinnati Children's Hospital, and Germany's University of Wrzburg, examined the photoreceptor cells in the retina of the...

2011-04-28 13:57:50

In this month's Physics World, Richard Taylor, professor of physics, psychology and art at the University of Oregon, warns that artificial retinal implants "“ a technology fast becoming a reality "“ must adapt to the unique features of the human eye in order to become an effective treatment. The gap between digital camera technology and the human eye is getting ever smaller, in terms of both the number of light-sensitive detectors and the space that they occupy. A human retina...

2011-04-04 08:05:21

(Ivanhoe Newswire) "“ Turns out our sensitivity to seeing in color is not only due to cone cells in the retina, but also through the thyroid gland by controlling which visual pigment is produced in the cones. Research conducted on mice and rats has revealed that the production of visual pigment present in mature cones is regulated by the thyroid hormone. The team of researchers at the Max Planck Institute for Brain Research in Frankfurt/M., along with colleagues at the University of...

2010-12-09 07:44:53

(Ivanhoe Newswire) -- Melanopsin, a light sensor that sets the circadian rhythm- the body's biological clock- also plays an important role in vision, according to this study.Melanopsin's messengers, called melanopsin-expressing retinal ganglion cells (mRGCs), forward information about the brightness of incoming light directly to visual centers in the brain.The results show a new role for mRGCs during image-forming vision, and suggest that these cells could make a significant contribution to...

2010-06-25 15:11:33

Retinitis pigmentosa affects over one million people worldwide and is manifested by a progressive loss of sight, eventually leading to blindness. Retinitis pigmentosa is a form of inherited retinal degeneration that affects the light-sensitive cells : photoreceptors. Photoreceptors are a special type of neuron which convert light into nervous impulses. These impulses are then processed by the retina and transmitted along the nerve fibres to the brain. There are two types of photoreceptors:...

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2010-04-29 10:42:56

Veterinary vision scientists at the University of Pennsylvania have safely and successfully used a viral vector in targeting a class of photoreceptors of the retina called rods, a critical first step in developing gene therapies for inherited blindness caused by rod degeneration. In this study, the viral vector, or missile that carries the genetic material designed to correct a DNA mutation, was not intended to treat a disease but to demonstrate through the use of a fluorescent protein that a...

2010-02-17 08:34:10

Research by Johns Hopkins sensory biologists studying fruit flies, has revealed a critical step in fly vision. Humans with problems in this same step suffer retinal dystrophies, which manifest as visual defects ranging from mild visual impairments to complete blindness. The article, published Jan. 26 in Current Biology paves the way for using the fruit fly to screen for therapies to treat human retinal degeneration. Retinal dystrophies result from inherited defects in nearly every step of the...

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2010-02-16 09:40:00

Researchers at Washington University School of Medicine in St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design. Scientists mapped five types of light receptors in the chicken's eye. They discovered the receptors were laid out in interwoven mosaics that maximized the chicken's ability to see many colors in any given part of the retina, the light-sensing structure at the back of the eye. "Based on this analysis, birds have clearly one-upped us in...

2009-07-28 08:43:42

The eyes of nocturnal bats possess two spectral cone photoreceptor types for daylight and colour vision. Reporting in the open-access, peer-reviewed journal PLoS ONE, scientists at the Max Planck Institute for Brain Research in Frankfurt and the University of Oldenburg have detected cones and their visual pigments in two flower-visiting species of bat. With electroretinographic recordings, they found an increased sensitivity to UV light in cone-stimulating light conditions. The researchers...

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2009-07-27 06:35:00

Researchers from the John Hopkins School of Medicine have discovered a new type of cell used for vision in fish.The report, which appears in the journal Nature, explains how researchers found a retinal horizontal cell that senses light and contributes to vision."This is mind-boggling," says King-Wai Yau, Ph.D., a professor of neuroscience at John Hopkins."For more than 100 years, it's been known that rod cells and cone cells are responsible for sensing light, and therefore, vision," says Yau....


Word of the Day
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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