Circadian Rhythm News and Research RSS Feed - Circadian Rhythm News and Research

Circadian Rhythm is the regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, feeding, etc. This rhythm seems to be set by a 'biological clock' which seems to be set by recurring daylight and darkness.
Research highlights interaction between biological clock and sleep loss at regional brain level

Research highlights interaction between biological clock and sleep loss at regional brain level

Ever wondered what happens inside your brain when you stay awake for a day, a night and another day, before you finally go to sleep? In a new study published today in the journal Science, a team of researchers from the University of Liege and the University of Surrey have scanned the brains of 33 participants across such a 2-day sleep deprivation period and following recovery sleep. [More]
CARRS-Q study shows caffeine combined with bright light can improve driver alertness

CARRS-Q study shows caffeine combined with bright light can improve driver alertness

Bright light combined with caffeine can improve driving performance and alertness of chronically sleep deprived young drivers, according to a Queensland University of Technology road safety study. [More]
Honeybee study finds link between social behavior and circadian rhythms

Honeybee study finds link between social behavior and circadian rhythms

Circadian rhythms are internal clocks that determine many of an organism's daily rhythms, for example sleep-wake, feeding, urinary output and hormone production. [More]
Study shows subcutaneous fat tissue has internal clock that regulates insulin sensitivity

Study shows subcutaneous fat tissue has internal clock that regulates insulin sensitivity

Fat tissue shows a robust circadian rhythm in a dish.In humans, glucose tolerance varies with time of day, but the mechanism responsible for the variation in insulin sensitivity throughout the day is unclear. [More]
Disruptive sleep patterns could raise heart disease risk in shift workers and insomniacs

Disruptive sleep patterns could raise heart disease risk in shift workers and insomniacs

People who suffer from a lack of sleep and disordered sleep cycles could be increasing their chances of developing cardiovascular disease, according to a study in the American Heart Association’s Journal Hypertension. [More]
Shift work alters internal body clock and leads to strokes, serious brain implications

Shift work alters internal body clock and leads to strokes, serious brain implications

Statistics show that some 15 million Americans don't work the typical nine-to-five. These employees (or shift workers), who punch in for graveyard or rotating shifts, are more prone to numerous health hazards, from heart attacks to obesity, and now, new research, published in Endocrinology, shows shift work may also have serious implications for the brain. [More]
Altered circadian somatostatin expression linked to bipolar disorder

Altered circadian somatostatin expression linked to bipolar disorder

Results of the first study of its kind to link abnormalities in circadian rhythms to changes in specific neurotransmitters in people with bipolar disorder will be published this week in the journal Biological Psychiatry. [More]
Salk scientists discover REV-ERBα protein that controls strength of circadian rhythm

Salk scientists discover REV-ERBα protein that controls strength of circadian rhythm

At noon every day, levels of genes and proteins throughout your body are drastically different than they are at midnight. Disruptions to this 24-hour cycle of physiological activity are why jet lag or a bad night's sleep can alter your appetite and sleep patterns for days--and even contribute to conditions like heart disease, sleep disorders and cancers. [More]
Neuropeptide plays role in driving rhythms of detoxification gene activity, study shows

Neuropeptide plays role in driving rhythms of detoxification gene activity, study shows

A 24-hour rhythm of cellular detoxification in flies and mammals is coordinated by a neuropeptide that also drives feeding in both organisms, found a team led by Amita Sehgal, PhD, a professor of Neuroscience and director of the Chronobiology Program, in the Perelman School of Medicine at the University of Pennsylvania. [More]
Sleep hormone melatonin may be responsible for type 2 diabetes risk among overnight workers

Sleep hormone melatonin may be responsible for type 2 diabetes risk among overnight workers

A new experimental and clinical study from Lund University in Sweden shows that the sleep hormone melatonin impairs insulin secretion in people with a common gene variant. [More]
Limiting blue-light exposure could increase quality, length of sleep

Limiting blue-light exposure could increase quality, length of sleep

Building on existing evidence, vision researchers have found that limiting exposure to blue light after sunset increases the quality and length of sleep. The research is being presented at the 2016 Annual Meeting of the Association for Research in Vision and Ophthalmology this week in Seattle, Wash. [More]
Scientists identify key pathway that regulates 'switch' between wakefulness and sleep

Scientists identify key pathway that regulates 'switch' between wakefulness and sleep

Falling asleep and waking up are key transitions in everyone's day. Millions of people have trouble with these transitions - they find it hard to fall asleep or stay asleep at night, and hard to stay awake during the day. Despite decades of research, how these transitions work - the neurobiological mechanics of our circadian rhythm - has remained largely a mystery to brain scientists. [More]
Chronic lack of sleep, irregular sleep-wake cycles may increase risk of Parkinson's disease

Chronic lack of sleep, irregular sleep-wake cycles may increase risk of Parkinson's disease

Chronic lack of sleep and irregular sleep-wake cycles may be risk factors of Parkinson's disease, new work by researchers at the Lewis Katz School of Medicine at Temple University suggests. In an animal model, the researchers show that disturbances in circadian rhythm that exist before Parkinson's onset dramatically worsen motor and learning deficits brought on by the disease. [More]
Genetic variants associated with preference to mornings or nights

Genetic variants associated with preference to mornings or nights

23andMe, Inc., the leading personal genetics company, today announced the results of a genome-wide association study (GWAS) identifying genetic variants associated with being a morning person. [More]
Human body clock study paves way for drug treatment of osteoarthritis

Human body clock study paves way for drug treatment of osteoarthritis

A University of Manchester biologist has for the first time established that the painful and debilitating symptoms endured by osteoarthritis sufferers are intrinsically linked to the human body clock. [More]
Lucimed offers Luminette light therapy glasses for people suffering from seasonally induced issues

Lucimed offers Luminette light therapy glasses for people suffering from seasonally induced issues

For millions of people, the arrivalof fall and winter are unwelcome events. A change in seasons often brings a change in their physical and mental health, due to fewer hours of sunlight. [More]
Jet lag-like sleep disruptions promote memory problems, chemical alterations in the brain

Jet lag-like sleep disruptions promote memory problems, chemical alterations in the brain

Chemical changes in brain cells caused by disturbances in the body's day-night cycle may be a key underlying cause of the learning and memory loss associated with Alzheimer's disease, according to a University of California, Irvine study. [More]
Melatonin and the circadian rhythm: an interview with Professor Kennaway, University of Adelaide

Melatonin and the circadian rhythm: an interview with Professor Kennaway, University of Adelaide

The production of melatonin is controlled by a part of the brain called the suprachiasmatic nucleus (SCN) and its timing fine-tuned by our exposure to light during the morning. [More]

AASM's new guideline provides updated recommendations for treatment of circadian rhythm sleep-wake disorders

A new clinical practice guideline published by the American Academy of Sleep Medicine provides clinicians with updated recommendations for the treatment of intrinsic circadian rhythm sleep-wake disorders (CRSWDs). [More]
Cancer-causing gene disrupts internal rhythm, metabolic pathways in cancer cells

Cancer-causing gene disrupts internal rhythm, metabolic pathways in cancer cells

Myc is a cancer-causing gene responsible for disrupting the normal 24-hour internal rhythm and metabolic pathways in cancer cells, found a team led by researchers from the Perelman School of Medicine at the University of Pennsylvania. Postdoctoral fellow Brian Altman, PhD, and doctoral student Annie Hsieh, MD, both from the lab of senior author Chi Van Dang, MD, PhD, director Abramson Cancer Center, study body clock proteins associated with cancer cells. [More]
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