Circadian Rhythm News and Research

Latest Circadian Rhythm News and Research

Increased risk of breast cancer associated with working night shifts

Working night shifts more than twice a week is associated with an increased risk of breast cancer, finds a long term study published online in Occupational and Environmental Medicine.

29 May 2012

Study finds large amounts of melanopsin in the human brain

A new study by Oulu University found large amounts of a light-sensitive OPN4-protein, melanopsin, in the human brain.

22 May 2012

Regular eating times, extended daily fasting may prevent diabetes, obesity

It turns out that when we eat may be as important as what we eat. Scientists at the Salk Institute for Biological Studies have found that regular eating times and extending the daily fasting period may override the adverse health effects of a high-fat diet and prevent obesity, diabetes and liver disease in mice.

18 May 2012

Cordoning off of lipids of the liver helps manage insulin resistance in the body

A Penn research team, led by Mitchell Lazar, MD, PhD, director of the Institute for Diabetes, Obesity, and Metabolism at the Perelman School of Medicine, University of Pennsylvania, reports in Nature Medicine that mice in which an enzyme called histone deacetylase 3 (HDAC3) was deleted had massively fatty livers, but lower blood sugar, and were thus protected from glucose intolerance and insulin resistance, the hallmark of diabetes.

7 May 2012

Strong light can treat myocardial infarction

There are lots of ways to treat a heart attack - CPR, aspirin, clot-busters and more. Now CU medical school researchers have found a new candidate: Intense light.

26 Apr 2012

U-M project to examine link between bipolar disorder and abnormalities in the circadian

A math professor at the University of Michigan will lead an international, $1 million project examining the links between bipolar disorder and abnormalities in the circadian, or daily, rhythms of a mammal's internal clock.

25 Apr 2012

Inadequate sleep linked to higher diabetes risk

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12 Apr 2012

Two Rev-erb proteins work together to control fat metabolism

The 24-hour internal clock controls many aspects of human behavior and physiology, including sleep, blood pressure, and metabolism. Disruption in circadian rhythms leads to increased incidence of many diseases, including metabolic disease and cancer. Each cell of the body has its own internal timing mechanism, which is controlled by proteins that keep one another in check.

7 Apr 2012

Powerful link between circadian rhythms and metabolism

The discovery of a major gear in the biological clock that tells the body when to sleep and metabolize food may lead to new drugs to treat sleep problems and metabolic disorders, including diabetes.

7 Apr 2012

New synthetic small molecules could treat obesity, diabetes and sleep disorders

Scientists from the Florida campus of The Scripps Research Institute have synthesized a pair of small molecules that dramatically alter the core biological clock in animal models, highlighting the compounds' potential effectiveness in treating a remarkable range of disorders-including obesity, diabetes, high cholesterol, and serious sleep disorders.

30 Mar 2012

Circadian rhythms control production of metabolites

By analyzing the hundreds of metabolic products present in the liver, researchers with the UC Irvine Center for Epigenetics & Metabolism have discovered that circadian rhythms - our own body clock - greatly control the production of such key building blocks as amino acids, carbohydrates and lipids.

20 Mar 2012

Obesity appears to increase risk of mortality tied to sleeping pills

Obesity appears to significantly increase the risk of death tied to sleeping pills, nearly doubling the rate of mortality even among those prescribed 18 or fewer pills in a year, researchers reported Friday.

17 Mar 2012

Conference highlights studies on metabolism, aging and monarch butterfly migration

The Genetics Society of America's 53rd Annual Drosophila Research Conference, March 7-11 at the Sheraton Chicago Hotel & Towers, will showcase diverse efforts to understand basic biological processes through the easy-to-study fruit fly, Drosophila melanogaster, and other insects.

12 Mar 2012

Daylight-saving time may increase risk of heart attack

Daylight-saving time this year begins March 11, and while we all might look forward to another hour of sunshine a University of Alabama at Birmingham expert says the time change is not necessarily good for your health.

8 Mar 2012

Nitrogen balance occurs with a precise 24-hour rhythm in mammals

Researchers at Case Western Reserve University School of Medicine demonstrated that nitrogen balance, the process of utilizing amino acids and disposing of their toxic byproducts, occurs with a precise 24-hour rhythm - also known as circadian rhythm - in mammals. Disruption of this cycle has a direct impact on survival of organisms, and may predispose one to life altering diseases including diabetes and cardiovascular disease.

7 Mar 2012

Sleeping pills may increase risk of cancer-related death

People are relying on sleeping pills more than ever to get a good night's rest, but a new study by Scripps Clinic researchers links the medications to a 4.6 times higher risk of death and a significant increase in cancer cases among regular pill users.

28 Feb 2012

Circadian rhythm can influence a heart attack

Researchers have found that a biological clock can influence a heart attack. The risk of “sudden cardiac death” peaks in the morning and rises again in the evening as shown in lab animals.

23 Feb 2012

First molecular evidence links body's natural circadian rhythms to SCD

A fundamental discovery reported in the March 1st issue of the journal Nature, uncovers the first molecular evidence linking the body's natural circadian rhythms to sudden cardiac death (SCD). Ventricular arrhythmias, or abnormal heart rhythms, are the most common cause of sudden cardiac death: the primary cause of death from heart disease.

23 Feb 2012

Scientists discover missing link between body's biological clock and sugar metabolism system

Scientists have discovered a missing link between the body's biological clock and sugar metabolism system, a finding that may help avoid the serious side effects of drugs used for treating asthma, allergies and arthritis.

20 Dec 2011

Working night shifts may raise risk of diabetes: Study

About 26% percent of the American workforce, including health-care workers and sanitation staff, need to work night shifts. Earlier research has shown that regular night shifts may disrupt the circadian rhythm, raising the risk of heart disease, obesity, ulcers and even depression.

8 Dec 2011