Circadian Rhythm News and Research

Latest Circadian Rhythm News and Research

NSF to hold Sleep Health & Safety conference in Washington

The National Sleep Foundation (NSF) will hold its annual Sleep Health & Safety conference March 2-3, 2012 at the JW Marriott in Washington, DC.

21 Oct 2011

Circadian disruption and sleep restriction increase risk of MS in teens

Researchers from Sweden have uncovered an association between shift work and increased risk of multiple sclerosis. Those who engage in off-hour employment before the age of 20 may be at risk for MS due to a disruption in their circadian rhythm and sleep pattern. Findings of this novel study appear today in Annals of Neurology, a journal published by Wiley-Blackwell on behalf of the American Neurological Association and Child Neurology Society.

18 Oct 2011

Different molecular mechanisms in suprachiasmatic nucleus linked to jet lag differences

It's no secret that long-distance, west-to-east air travel - Seattle to Paris, for example - can raise havoc with a person's sleep and waking patterns, and that the effects are substantially less pronounced when traveling in the opposite direction.

14 Oct 2011

Bedtime consumption of blood pressure medications improves control of hypertension

Patients who take certain popular types of blood pressure medication once a day are able to achieve somewhat better control of their hypertension if they take their daily dose at bedtime, according to a new systematic review.

7 Oct 2011

Discovery of ‘alarm-clock’ gene

Researchers led by Indian-American scientist, Satchidananda Panda at the Salk Institute for Biological Studies in La Jolla, Calif., said the gene is responsible for starting the body’s biological clock from its restful state every morning. They add that this may open avenues in research in insomnia or sleeplessness, aging and chronic illnesses.

3 Oct 2011

Jeffrey C. Hall, Michael W. Young and Michael Rosbash to receive 2011 Louisa Gross Horwitz Prize

Columbia University will award the 2011 Louisa Gross Horwitz Prize to Jeffrey C. Hall, Michael Rosbash, and Michael W. Young for their work on the molecular basis of circadian rhythms, the first demonstration of a molecular mechanism for behavior.

1 Oct 2011

Researchers identify gene responsible for starting the biological clock

Ever wondered why you wake up in the morning ---- even when the alarm clock isn't making jarring noises? Wonder no more. Researchers at the Salk Institute for Biological Studies have identified a new component of the biological clock, a gene responsible for starting the clock from its restful state every morning.

1 Oct 2011

Rotating shift pattern may not disrupt circadian rhythm or melatonin production

Recent research suggests that the modern day-day-night-night shift pattern for shift workers may not be as disruptive or as potentially carcinogenic as older, more extreme shift patterns.

28 Sep 2011

Longevity research till date may be riddled with flaws: Study

Research over the last decade showing that proteins called sirtuins can increase lifespan is deeply flawed, according to a new study in Nature that debunks prior claims of a direct causal link.

22 Sep 2011

Researchers demonstrate connection between circadian rhythm, platelet function and cardiovascular risk

Researchers at Brigham and Women's Hospital (BWH) have demonstrated that the circadian system, the body's internal clock, regulates human platelet function and causes a peak in platelet activation corresponding to the known morning peak in adverse cardiovascular events. These findings are published in PLoS ONE on September 8, 2011.

9 Sep 2011

Researchers identify five SNPs linked with aggressive, lethal prostate cancer

An international team of researchers led by Fred Hutchinson Cancer Research Center has identified five inherited genetic variants that are strongly associated with aggressive, lethal prostate cancer.

17 Aug 2011

Light may play a role in modulating fear and anxiety

Biologists and psychologists know that light affects mood, but a new University of Virginia study indicates that light may also play a role in modulating fear and anxiety.

11 Aug 2011

Humans and zebrafish share mechanisms that regulate the circadian system

Circadian rhythms - the natural cycle that dictates our biological processes over a 24-hour day - does more than tell us when to sleep or wake. Disruptions in the cycle are also associated with depression, problems with weight control, jet lag and more. Now Prof. Yoav Gothilf of Tel Aviv University's Department of Neurobiology at the George S. Wise Faculty of Life Sciences is looking to the common zebrafish to learn more about how the human circadian system functions.

21 Jul 2011

New insights into sleep difficulties among older people

A new study of the brain's master circadian clock - known as the suprachiasmatic nucleus, or SCN - reveals that a key pattern of rhythmic neural activity begins to decline by middle age. The study, whose senior author is UCLA Chancellor Gene Block, may have implications for the large number of older people who have difficulty sleeping and adjusting to time changes.

20 Jul 2011

Arabidopsis thaliana helps scientists to solve puzzles in human health

A tiny plant called Arabidopsis thaliana just helped scientists unearth new clues about the daily cycles of many organisms, including humans. This is the latest in a long line of research, much of it supported by the National Institutes of Health, that uses plants to solve puzzles in human health.

14 Jul 2011

Eating at wrong time of the day reduces fertility in fruit flies

Dieticians will tell you it isn't healthy to eat late at night: it's a recipe for weight gain. In fruit flies, at least, there's another consequence: reduced fertility.

8 Jun 2011

Abnormal clock gene coordination observed in tissues of Alzheimer's patients

Twenty-four hour cycles, known as circadian rhythms, are important for proper body functions, including for normal brain function and mental health. Disruptions of circadian rhythms and sleep-wake cycles have been observed in patients with Alzheimer's disease. A new study by Douglas Institute researchers unravels a possible basis for these perturbations.

28 Apr 2011

Heart attacks more severe in the morning: Study

Heart attacks are more dangerous in the morning than at any other time of day, research has shown. The study has shown that compared with other times, patients who had an attack between 6am and noon suffered around 20% more damage to their hearts. Researchers say this pattern is thought to be linked to circadian rhythms, the 24-hour “body clock” processes that influence many biological functions including blood pressure.

28 Apr 2011

Astrocytes regulate circadian system that controls normal sleep patterns

The circadian system that controls normal sleep patterns is regulated by a group of glial brain cells called astrocytes, according to a study published online on April 14th in Current Biology, a Cell Press publication. Neuroscientists from Tufts University School of Medicine found that disruption of astrocyte function in fruit flies ( Drosophila) led to altered daily rhythms, an indication that these star-shaped glial cells contribute to the control of circadian behavior.

15 Apr 2011

Nurses use ineffective strategy for adapting circadian clocks to night-time schedule

As many as 25 percent of hospital nurses go without sleep for at least 24 hours in order to adjust to working on the night shift, which is the least effective strategy for adapting their internal, circadian clocks to a night-time schedule.

15 Apr 2011