Circadian Rhythm News and Research

Latest Circadian Rhythm News and Research

Time of day influences response to chemotherapy

For years, research has hinted that the time of day that cancer patients receive chemotherapy can impact their chances of survival.

14 Jan 2009

High-fat diet can disrupt our biological clock

Indulgence in a high-fat diet can not only lead to overweight because of excessive calorie intake, but also can affect the balance of circadian rhythms - everyone's 24-hour biological clock, Hebrew University of Jerusalem researchers have shown.

29 Dec 2008

Research suggests that immunity is stronger at night

The immune system's battle against invading bacteria reaches its peak activity at night and is lowest during the day.

14 Dec 2008

Postpartum depression can lead to poor sleep quality

A study published in the current issue of the Journal of Obstetric, Gynecologic, & Neonatal Nursing shows that depression symptoms worsen in PPD patients when their quality of sleep declines.

10 Dec 2008

Scientists find 12 new genes with potential as drug targets

Scientists have identified 12 new genes that are somewhat strange bedfellows: Some link gallstones and blood cholesterol levels, others link melatonin and sleep patterns to small increases in glucose levels and larger jumps in the risk of diabetes.

8 Dec 2008

Body clock and sleep patterns linked to diabetes and high blood sugar

Diabetes and high levels of blood sugar may be linked to abnormalities in a person's body clock and sleep patterns, according to a genome-wide association study published today in the journal Nature Genetics.

7 Dec 2008

Light exposure therapy, dark sunglasses help night-shift workers

A new study finds the use of light exposure therapy, dark sunglasses and a strict sleep schedule can help night-shift workers create a "compromise circadian phase position," which may result in increased performance and alertness during night shifts while still allowing adequate nighttime sleep on days off.

3 Dec 2008

New evidence shows that the heart beats to its own drummer

They've uncovered some of the molecular circuitry within the cardiovascular system itself that controls the daily rise and fall of blood pressure and heart rate. The findings might also explain why commonly used diabetes drugs come with cardiovascular benefits, according to the researchers.

3 Dec 2008

New sleeping pill could be the answer to jet lag

An experimental drug developed by Australian scientists could offer a new cure for jet lag and be a welcome alternative to addictive sedatives such as benzodiazepines.

3 Dec 2008

New drug tasimelteon may cure jet lag

A team of researchers from Monash University, The Brigham and Women's Hospital (Boston), Harvard Medical School and Vanda Pharmaceuticals has found a new drug with the potential to alleviate jet lag and sleep disorders caused by shift work.

3 Dec 2008

Valdoxan - a melatonergic antidepressant - receives positive European opinion for major depressive disorder

The first melatonergic antidepressant - Valdoxan/Thymanax (agomelatine) - has received a positive opinion from the European Medicines Agency's (EMEA) Committee for Medicinal Products for Human Use (CHMP) for its use in the treatment of adult patients with major depressive disorder (MDD).

21 Nov 2008

Daily rhythms in endothelial cells may explain why heart attacks occur most often in early morning hours

It's not just the stress of going to work. Daily rhythms in the activity of cells that line blood vessels may help explain why heart attacks and strokes occur most often in early morning hours, researchers from Emory University School of Medicine have found.

11 Nov 2008

Treatments for seasonal affective disorder (SAD)

Bright white light therapy has been used to treat seasonal affective disorder (SAD) for more than 20 years.

7 Nov 2008

Genetic mutation linked to seasonal affective disorder

With the days shortening toward winter, many people will begin to experience the winter blahs.

4 Nov 2008

Depression and suicidal thoughts among police officers differ based on gender and work shift

A quarter of female police officers and nearly as many male officers assigned to shift work had thought about taking their own lives, a new study of police work patterns and stress headed by a University at Buffalo researcher has shown.

19 Oct 2008

Respiratory sinus arrhythmia is a significant predictor of insomnia in women with breast cancer

A study in the October 15 issue of the Journal of Clinical Sleep Medicine shows that respiratory sinus arrhythmia (RSA) is a significant predictor of insomnia in women with breast cancer and confirmed that longer nocturnal wake episodes were associated with a flatter diurnal cortisol slope.

15 Oct 2008

Researchers investigate impact of stress on police officers' physical and mental health

Policing is dangerous work, and the danger lurks not on the streets alone. The pressures of law enforcement put officers at risk for high blood pressure, insomnia, increased levels of destructive stress hormones, heart problems, post-traumatic stress disorder (PTSD) and suicide, University at Buffalo researchers have found through a decade of studies of police officers.

25 Sep 2008

Mom's depression, baby's sleep linked?

If there's one thing that everyone knows about newborn babies, it's that they don't sleep through the night, and neither do their parents. But in fact, those first six months of life are crucial to developing the regular sleeping and waking patterns, known as circadian rhythms, that a child will need for a healthy future.

2 Sep 2008

New sleep lab to benefit shift-workers

Two specialist laboratories opening night at the University of Sydney will shed light on the impact of sleep and circadian disruption in medical disorders and shift-workers, and the neurobiological mechanisms underlying substance abuse and depression.

21 Aug 2008

New model for studying the genetics of Angelman syndrome

A model for studying the genetics of Angelman syndrome, a neurological disorder that causes mental retardation and other symptoms in one out of 15,000 births, has been developed by biologists at The University of Texas at Austin.

14 Aug 2008