Unlike their cousins, rods and cones, newly discovered retinal cells don’t aid sight in a traditional sense. Instead, they constrict the eye’s pupil and set the body’s circadian clock. But new research from Brown University – where the photoreceptors were discovered by David Berson and colleagues – shows that these cells are sensitive to lighting conditions in a manner similar to rods and cones. Results appear in Neuron.
A complementary system in the eye
Intrinsically photosensitive retinal ganglion cells – ipRGCs – shown in this lab image of cell bodies and their dendrites from the eye of a mouse, constrict the pupil and give the brain information about circadian rhythms. Image: David Berson/Brown University
A new retinal photoreceptor adjusts its sensitivity in different lighting conditions, according to scientists at Brown University, where the rare eye cells were discovered.
The results, published in Neuron, are a surprise. Though rods and cones, their biological cousins in the retina, clearly adjust to light levels, these new cells – intrinsically photosensitive retinal ganglion cells, or ipRGCs – were assumed not to adapt this way. Still, the adaptation process in ipRGCs is weaker and slower than it is in rods and cones.
Wendy Lawton | EurekAlert!
Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University
How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-Zentrum für Infektionsforschung
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy