Circadian Rhythms Current Events

Circadian Rhythms Current Events, Circadian Rhythms News Articles.
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Plants can tell the time using sugars
A new study by an international team of scientists, including the University of Bristol, has discovered that plants adjust their daily circadian rhythm to the cycle of day and night by measuring the amount of sugars in their cells. (2018-08-02)

Potassium is critical to circadian rhythms in human red blood cells
An innovative new study from the University of Surrey and Cambridge's MRC Laboratory of Molecular Biology, published in the prestigious journal Nature Communications, has uncovered the secrets of the circadian rhythms in red blood cells and identified potassium as the key to unravelling the mystery. (2017-12-12)

Banding together: RAS signaling of circadian output
In the June 15 issue of G&D, Drs. Jay Dunlap and Jennifer Loros, with colleagues at Dartmouth Medical School, have finally cloned the band gene, and have found that it is an allele of ras-1. This finding posits RAS signaling as a key mediator of circadian output. (2007-06-14)

Delaying meals impacts the sugar levels of the body
In the first human study of its kind, researchers from the University of Surrey discovered that delaying meal times delays the circadian rhythm of sugar in the blood. The findings could prove to be a breakthrough in alleviating symptoms of jet lag and shift work, a new study in the journal Current Biology reports. (2017-06-01)

Melatonin reduces blood pressure and tunes up disrupted circadian rhythms in the elderly
Increased blood pressure and reduced robustness of circadian rhythms are frequently reported in elderly subjects. The present study was aimed to investigate whether such changes can be reversed by daily melatonin ingestion. (2016-05-17)

Cells in the retina light the way to treating jet lag
Researchers have found a new group of cells in the retina that directly affect the biological clock by sending signals to a region of the brain which regulates our daily (circadian) rhythms. This new understanding of how circadian rhythms are regulated through the eye could open up new therapeutic possibilities for restoring biological clocks in people who have jet lag through travelling or working night shifts. (2017-04-17)

Exercise Reduces Stress Effects And Depressive Symptoms In Clock Gene Mouse
Northwestern researchers found that chronic stress influenced daily activity rhythms during the time Clock gene mice were exposed to stress and that it induced depressive-like behavioral changes which persisted for weeks after stressful conditions had been removed. Changes in rhythms and behavior were more pronounced in animals without access to running wheels. (1997-10-25)

Living against the clock: Does loss of daily rhythms cause obesity?
When Thomas Edison tested the first light bulb in 1879, he could never have imagined that his invention could one day contribute to a global obesity epidemic. Electric light allows us to work, rest and play at all hours of the day, and a paper published this week in Bioessays suggests that this might have serious consequences for our health and for our waistlines. (2012-08-29)

Could melatonin be the key to healthy aging?
A new British Journal of Pharmacology review highlights the role of melatonin -- a hormone that is produced at night -- in regulating sleep and the body's biological, or circadian, clock. Research suggests that melatonin treatments may even help to improve the restorative value of sleep and to promote healthy physical and mental aging. (2018-01-10)

Researchers Identify New Component Of Circadian Clock
Researchers at Harvard Medical School have identified a protein that partners with the mammalian CLOCK protein to regulate circadian rhythms. Together, the two proteins appear to induce transcription of circadian rhythm genes. Their findings are published in the June 5 Science. (1998-06-05)

Peripheral timekeeping: Mammalian cells outside the brain have their own circadian clocks
Researchers have discovered that individual fibroblast cells contain independent, self-sustaining circadian (ca. 24 hr) clocks. Circadian clocks are important for synchronizing many physiological and behavioral processes to the day/night cycle. (2004-11-23)

Coordinating power of circadian rhythms keeps estrus and pregnancy on track
Researchers at Northwestern University have begun to uncover the basis for how the daily patterns of biological behavior known as circadian rhythms are able to control complex events such as reproduction, which in female mammals requires precise but dynamic regulation of hormone levels. By studying the Clock mutant mouse, which has a mutation in a gene that regulates the internal clock, researchers have shown that normal female reproductive function depends on an intact biological clock. (2004-08-09)

Simple changes in ICU can help heart attack patients: Study
To improve recovery for heart attack patients, hospitals should maintain normal day and night cycles for those patients during the first few days after the attack, say University of Guelph researchers. (2014-04-01)

Glowing Cyanobacteria Gives Researchers New Clues To Circadian Rhythms
Three genes essential to circadian rhythms in cyanobacteria, the simplest organisms known to have such (1998-09-04)

Spinal cord injury could throw off body's internal clock, study shows
Although paralysis is the most noticeable result of a spinal cord injury, a new study by researchers at The University of Texas at Austin suggests such injuries could throw off the internal clock of the entire body's daily activities, from hormones to sleep-wake schedules. (2018-12-04)

Researchers observe disruptions of daily rhythms in Alzheimer's patients' brains
Disruptions of circadian rhythms and sleep-wake cycles have been observed in patients with Alzheimer's disease. A new study unravels a possible basis for these perturbations. Recent findings from the Douglas Mental Health University Institute are the first to show function in multiple areas of the human brain. (2011-04-27)

Fat cells work different 'shifts' throughout the day
Fat cells in the human body have their own internal clocks and exhibit circadian rhythms affecting critical metabolic functions, new research in the journal Scientific Reports, finds. (2019-02-25)

Level of unconsciousness in brain damaged patients related to body temperature
Circadian rhythms may play a crucial role in the recovery of consciousness of patients with severe brain injuries, a study published in Neurology. (2017-04-20)

Circadian clock controls plant growth hormone
The plant growth hormone auxin is controlled by circadian rhythms within the plant, UC-Davis researchers have found. The discovery explains how plants can time their growth to take advantage of resources such as light and water, and suggests that many other processes may be influenced by circadian rhythms. (2007-08-10)

Synchronized voltage rhythms could maintain the body's clock
Cells in the brain's master circadian clock synchronize voltage rhythms despite asynchronous calcium rhythms, which might explain how a tissue-wide rhythm is maintained. (2017-04-23)

Unnatural light-dark cycles expose duelling circadian clocks
In mammals, the endogenous daily pacemaker that regulates circadian rhythms like sleep and wakefulness is localized to a defined site in the brain, the suprachiasmatic nucleus (SCN). By exposing rats to a very short day/night schedule researchers have discovered within the SCN two sub-clocks that normally oscillate in unison, but can become disconnected from one another as a result of artificial day/night cycles. (2004-05-03)

Disruption of circadian rhythms may contribute to inflammatory disease
A disruption of circadian rhythms, when combined with a high-fat, high-sugar diet, may contribute to inflammatory bowel disease and other harmful conditions, according to a recent study conducted by researchers at Rush University Medical Center. The study is online at the peer-reviewed, open-access journal, PLOS ONE. (2014-05-21)

Virginia Tech researchers will use NSF award to probe circadian rhythms
A $750,000 National Science Foundation award will aid researchers at the Virginia Bioinformatics Institute at Virginia Tech to study circadian rhythms' effects on processes that affect numerous diseases and disorders, including cancer. (2015-10-25)

Feeling the rhythm
The Circadian Rhythms investigation examines whether long-term spaceflight throws off circadian rhythm in astronauts and the role of factors such as irregular light and dark cycles, microgravity induced changes in body composition, and reduced physical activity. (2016-10-26)

For resetting circadian rhythms, neural cooperation is key
Fruit flies are pretty predictable when it comes to scheduling their days, with peaks of activity at dawn and dusk and rest times in between. Now, researchers reporting in the Cell Press journal Cell Reports on April 17 have found that the clusters of brain cells responsible for each of those activity peaks -- known as the morning and evening oscillators, respectively -- don't work alone. For flies' internal clocks to follow the sun, cooperation is key. (2014-04-17)

Scientists clock on to how sunlight shapes daily rhythms
Fresh insight into how biological clocks adjust to having less sunlight in the winter could help us better understand the impact of jet lag and shift work. (2010-11-22)

Researchers show how plants tell the time
BBSRC-funded scientists from the University of Cambridge Department of Plant Sciences are studying how plants are able to set and maintain this internal clock. They have found that the sugars produced by plants are key to timekeeping. (2013-10-23)

Uncovering the secrets of sleep and circadian rhythms
Our circadian rhythms tell us when it's time to sleep and energize us at different times of the day; evidence suggests it also plays a role in the development of diseases such as cancer. Elsevier, a world-leading provider of scientific, technical and medical information products and services, announces the launch of a new open-access journal that will publish latest research on sleep and circadian rhythms. (2015-10-14)

What does an airline traveler have in common with a glowing fish?
Research in the premier open-access journal PLoS Biology reveals that generation of zebrafish that express the firefly luciferase gene under a clock gene promoter enables the study of molecular circadian rhythms in vivo. (2005-01-31)

Researchers identify key components linking circadian rhythms and cell division cycles
Researchers at the University of Cincinnati have identified key molecular components linking circadian rhythms and cell division cycles in Neurospora crassa, providing insights that could lead to improved disease treatments and drug delivery. (2014-01-14)

The circadian clock is like an orchestra with many conductors
You've switched to the night shift and your weight skyrockets, or you wake at 7 a.m. on weekdays but sleep until noon on weekends -- a social jet lag can fog your Saturday and Sunday. (2014-03-27)

Plant water saving system works like clockwork, it transpires
Plants, just like humans, have circadian clocks that allow them to tell the time. In humans this cellular clockwork influences when we wake and sleep. (2020-03-17)

A novel method to measure circadian cycles
A research article published in the freely-available online journal PLoS Biology reveals a novel method permits characterization of circadian rhythms in humans and mice using single skin biopsies. (2005-09-26)

Atherosclerosis: Stopped on time
For the first time, LMU researchers are pointing out the influence of the internal clock on atherosclerosis. Their study gives an important indication on how the therapeutic approach can be improved. (2018-05-31)

Two Brandeis Scientists Shed Light On The First Photoreceptor Known To Set Circadian Rhythms
For the first time, scientists have identified a protein that uses natural light to set circadian rhythms -- and the protein, found in species ranging from microbes to fruit flies to humans, isn't one most researchers had expected to play a role in programming organisms' internal clockwork. (1998-11-23)

Disrupted circadian rhythms may drive anxiety and exacerbate brain disorders
Sleep disruptions are associated with many brain disorders, including anxiety, dementias, and traumatic brain injury. While these disruptions are sometimes viewed as a side effect of brain disorders, new findings presented today suggest that aberrant sleep-wake cycles can also drive brain pathology. The studies were presented at Neuroscience 2018, the annual meeting of the Society for Neuroscience and the world's largest source of emerging news about brain science and health. (2018-11-05)

From the beginning, the brain knows the difference between night and day
The brain is apparently programmed from birth to develop the ability to determine sunrise and sunset, according to new research on circadian rhythms that research sheds new light on brain plasticity and may explain some basic human behaviors. (2011-04-28)

Bacteria divide like clockwork
A team of researchers at MIT and the University of California at San Diego has shown how cell division in a type of bacteria known as cyanobacteria is controlled by the same kind of circadian rhythms that govern human sleep patterns. Previous studies have shown that even though cyanobacteria do not (2010-03-18)

Biological clock disruptions increase breast cancer risk, UGA study finds
The disruption of a person's circadian rhythm -- their 24-hour biological clock -- has been linked to an increased risk of breast cancer, according to new University of Georgia research. The culprit, in this study in particular, is artificial light. 'Exposure to artificial light leads to a significantly higher risk for developing breast cancer,' said Chunla He, a biostatistics graduate student in the UGA College of Public Health. (2014-10-17)

Separating morning and evening in the circadian clock of mammals
Work by researchers at the Universities of Aberdeen and Nottingham suggests an anatomical basis for the adaptation of the mammalian circadian clock to changing day-length. A key question for circadian biologists concerns the way in which seasonal changes in day-length alter the behavior of circadian clocks over the course of the year. In the new work, researchers considered the possibility that distinct populations of neurons within the principal mammalian circadian clock might constitute these different oscillators. (2005-06-20)

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