Circadian Rhythm News and Research

Latest Circadian Rhythm News and Research

Metabolic master switch sets the biological clock in body tissues

Our body's activity levels fall and rise to the beat of our internal drums-the 24-hour cycles that govern fundamental physiological functions, from sleeping and feeding patterns to the energy available to our cells. Whereas the master clock in the brain is set by light, the pacemakers in peripheral organs are set by food availability. The underlying molecular mechanism was unknown.

19 Oct 2009

Working Nights Spanish Calendar for Hispanics to improve their security and wellbeing

Circadian Age, Inc. – ‘Working Nights’ – a company dedicated to helping shift workers and their families adjust to their unique lifestyles, is announcing a new Spanish calendar. The 2010 Working Nights Spanish Calendar offers organizations with Hispanic workers the opportunity to show added concern about the health and safety of this group of employees, by providing them with educational material in their own language, to use at home.

7 Oct 2009

Top ten sleep and beauty tips

Bob Hickman, United Feather & Down's Senior Vice Present of Sales and Marketing, and Neil A. Petrocelli, Borghese, Inc.'s Vice President of Marketing, list their top sleep and beauty tips.

5 Oct 2009

Components of insulin-control system can reset body's biological clock

Many of the genes that regulate insulin also alter the timing of the circadian clock, a new study has found.

18 Sep 2009

Insulin metabolism regulates body's internal clock

While scientists have known for several years that our body's internal clock helps regulate many biological processes, researchers have found that the reverse is also true: Many common biological processes - including insulin metabolism - regulate the clock, according to a new study by investigators at the University of Pennsylvania School of Medicine, the Genomics Institute of the Novartis Research Foundation, and the University of California at San Diego.

18 Sep 2009

Eating at irregular times influences weight gain

Eat less, exercise more. Now there is new evidence to support adding another "must" to the weight-loss mantra: eat at the right time of day.

4 Sep 2009

Positive results from second pivotal phase III trial for Lodotra

Nitec Pharma AG ("Nitec" or "Nitec Pharma"), a Switzerland-based specialty pharma company focused on the development and commercialization of medicines to treat chronic inflammation and pain-related diseases, today announced positive results from the second pivotal phase III trial for its lead product, Lodotra(TM).

2 Sep 2009

Alcohol consumption disrupts circadian rhythm in humans

Chronic alcohol consumption blunts the biological clock's ability to synchronize daily activities to light, disrupts natural activity patterns and continues to affect the body's clock (circadian rhythm), even days after the drinking ends, according to a new study with hamsters.

1 Sep 2009

Chemotherapy affects sleep-wake activity rhythms of breast cancer patients

A study in the Sept.1 issue of the journal Sleep shows that the sleep-wake activity rhythms of breast cancer patients are impaired during the administration of chemotherapy. Results indicate that the first cycle of chemotherapy is associated with a temporary disruption of these rhythms, while repeated administration of chemotherapy results in progressively worse and more enduring impairments.

1 Sep 2009

Discovery of first gene involved in regulating the optimal length of human sleep

Scientists have discovered the first gene involved in regulating the optimal length of human sleep, offering a window into a key aspect of slumber, an enigmatic phenomenon that is critical to human physical and mental health.

13 Aug 2009

Research shows how cells tell time

In a new study appearing online this week in the Proceedings of the National Academy of Sciences, Dr. Liu and his co-workers have found that this mold, which uses a protein called FRQ as the main gear of its clock, marks time by a sequence of changes in the protein's chemical structure.

8 Jun 2009

Blue light goggles improve sleep quality in the elderly

Sleep disturbances increase as we age. Some studies report more than half of seniors 65 years of age or older suffer from chronic sleep disturbances. Researchers have long believed that the sleep disturbances common among the elderly often result from a disruption of the body's circadian rhythms - biological cycles that repeat approximately every 24 hours.

1 Jun 2009

MicroRNAs grease the cell's circadian clockwork

Most of our cells possess an internal clock, a group of genes displaying a cyclic expression pattern that reaches a peak once a day. A large number of circadian genes are expressed by organs such as the liver, whose activity needs to be precisely regulated over the course of the day.

31 May 2009

Biological timekeeper studies reveal new temperature regulator and track clock protein across a day

Dartmouth Medical School geneticists have made new inroads into understanding the regulatory circuitry of the biological clock that synchronizes the ebb and flow of daily activities, according to two studies published May 15.

17 May 2009

Period proteins PER:PER homodimer crucial for circadian clock function in flies

Scientists from Queen Mary, University of London have discovered a new protein complex operating in fruit fly circadian clocks, which may also help to regulate our own biological clocks.

30 Apr 2009

Poor sleep disturbs neuroendocrine control of appetite

Laboratory and epidemiological studies continue to show that sleep curtailment and/or decreased sleep quality can disturb neuroendocrine control of appetite, leading to overeating, and can decrease insulin and/or increase insulin resistance, both steps on the road to Type 2 diabetes.

22 Apr 2009

Jet lag disrupts sleep by throwing two neural centers out of sync

New research by scientists in the U.S. has revealed that the disrupted sleep which results from jet lag and shift work occurs in two separate but linked groups of neurons below the hypothalamus at the base of the brain.

19 Apr 2009

Jet lag disturbs sleep by upsetting internal clocks in 2 neural centers

Jet lag is the bane of many travelers, and similar fatigue can plague people who work in rotating shifts.

16 Apr 2009

Researchers model 3D structures of proteins that control human clock

In an Early Edition issue of The Proceedings of the National Academy of Sciences (PNAS) on April 9, 2009, the researchers report that they have been able to determine the molecular structure of a plant photolyase protein that is surprisingly similar to two cryptochrome proteins that control the "master clock" in humans and other mammals.

12 Apr 2009