http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. One of the pioneers in research on sleep:wake circadian genes, Amita Sehgal, Ph.D., has discovered that fruit flies' appetite and consumption are controlled by two rival sets of clocks, one in neurons and the other in the fly fat body, which is analogous to the liver. http://www.physorg.com/news179329066.html Biology Sun, 06 Dec 2009 14:00:01 EST news179329066 Malfunctioning circadian clock genes may be responsible for bipolar disorder in children. Researchers writing in the open access journal BMC Psychiatry found four versions of the regulatory gene RORB that were associated with pediatric bipolar disorder. http://www.physorg.com/news177224772.html Medicine & Health Thu, 12 Nov 2009 05:16:31 EST news177224772 If a circadian rhythm is like an orchestra - the united expression of the rhythms of millions of cells - a common chemical may serve as the conductor, or at least as the baton. http://www.physorg.com/news176480161.html Medicine & Health Tue, 03 Nov 2009 14:30:01 EST news176480161 Molecules that may hold the key to new ways to fight cancer and other diseases have been found to play an important role in regulating circadian rhythm, says Liheng Shi, a researcher in Texas A&M's Department of Veterinary Integrative Biosciences. http://www.physorg.com/news175276746.html Chemistry Tue, 20 Oct 2009 17:30:04 EST news175276746 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. http://www.physorg.com/news174834182.html Medicine & Health Thu, 15 Oct 2009 14:04:23 EST news174834182 (PhysOrg.com) -- University of Michigan mathematicians and their British colleagues say they have identified the signal that the brain sends to the rest of the body to control biological rhythms, a finding that overturns a long-held theory about our internal clock. http://www.physorg.com/news174228584.html Medicine & Health Thu, 08 Oct 2009 14:00:03 EST news174228584 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. http://www.physorg.com/news171007271.html Medicine & Health Tue, 01 Sep 2009 07:30:02 EST news171007271 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. http://www.physorg.com/news171006931.html Medicine & Health Tue, 01 Sep 2009 06:55:57 EST news171006931 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. http://www.physorg.com/news169391884.html Medicine & Health Thu, 13 Aug 2009 14:18:48 EST news169391884 Researchers at Oregon State University have discovered that the circadian rhythms or biological "clocks" in some insects can make them far more susceptible to pesticides at some times of the day instead of others. http://www.physorg.com/news169299983.html Biology Wed, 12 Aug 2009 12:47:19 EST news169299983 New research, conducted by Charles Wingo and his colleagues, at the University of Florida, Gainsville, suggests a link between the circadian rhythm and control of sodium (salt) levels in mice. http://www.physorg.com/news165687966.html Medicine & Health Wed, 01 Jul 2009 20:30:03 EST news165687966 The fuzzy pale mold that lines the glass tubes in Dr. Yi Liu's lab doesn't look much like a clock. But this fungus has an internal, cell-based timekeeper nearly as sophisticated as a human's, allowing UT Southwestern Medical Center physiologists to study easily the biochemistry and genetics of body clocks, or circadian rhythms. http://www.physorg.com/news163700594.html Medicine & Health Mon, 08 Jun 2009 17:24:15 EST news163700594 (PhysOrg.com) -- Embedded in our genes is a "clock" that regulates when we sleep, when we are awake and when we eat. This human clock manages what are known as circadian rhythms, 24-hour biological cycles that adapt our bodies to the light-dark pattern of day and night. http://www.physorg.com/news162826877.html Medicine & Health Fri, 29 May 2009 14:42:14 EST news162826877 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. http://www.physorg.com/news162813350.html Medicine & Health Fri, 29 May 2009 10:56:21 EST news162813350 Fluctuations in light intensity allow restoring the regularity of circadian rhythms. This is the main conclusion of the work carried out by Javier Buceta, group leader of The SiMBioSys Group (Theoretical and In Silico Modelling of Biological Systems) and Antoni Da ez-Noguera, dean at the Faculty of Pharmacy of the University of Barcelona. The study is published today in Biophysical Journal. http://www.physorg.com/news160898378.html Biology Thu, 07 May 2009 07:00:19 EST news160898378 A study in the May 1 issue of the journal SLEEP suggests that babies born to mothers with depression are more likely to suffer from significant sleep disturbances at 2 weeks postpartum that continue until 6 months of age. Findings of the study are of particular importance, as sleep disturbances in infancy may result in increased risk for developing early-onset depression in childhood. http://www.physorg.com/news160384516.html Medicine & Health Fri, 01 May 2009 08:15:39 EST news160384516 (PhysOrg.com) -- The circadian clock coordinates physiological and behavioral processes on a 24-hour rhythm, allowing animals to anticipate changes in their environment and prepare accordingly. Scientists already know that some genes are controlled by the clock and are turned on only one time during each 24-hour cycle. http://www.physorg.com/news159642057.html Medicine & Health Wed, 22 Apr 2009 18:01:27 EST news159642057 The circadian clocks that set the rhythmic motion of our bodies for wakeful days and sleepy nights can also set us up for vascular disease when broken, Medical College of Georgia researchers say. http://www.physorg.com/news157210291.html Medicine & Health Wed, 25 Mar 2009 14:31:57 EST news157210291 (PhysOrg.com) -- UC Irvine researchers have discovered that circadian rhythms - our own body clock - regulate energy levels in cells. The findings have far-reaching implications, from providing greater insights into the bond between the body's day-night patterns and metabolism to creating new ways to treat cancer, diabetes, obesity and a host of related diseases. http://www.physorg.com/news156087705.html Biology Thu, 12 Mar 2009 14:42:18 EST news156087705 (PhysOrg.com) -- Scientists have long known that interrupting the 24-hour circadian rhythm plays havoc with the lives and health of medical, military and airline personnel, factory employees and travelers. http://www.physorg.com/news154025101.html Biology Mon, 16 Feb 2009 16:45:51 EST news154025101 (PhysOrg.com) -- Isaac Edery is concerned with biological clocks, internal mechanisms that enable virtually all plants and animals to behave in rhythmic biological cycles known as circadian rhythms. http://www.physorg.com/news152381334.html Biology Wed, 28 Jan 2009 16:09:26 EST news152381334 (PhysOrg.com) -- A fruit fly's immune system can tell time -and how hard it punches back against infections depends on whether the fly is snoozing or cruising. The discovery by medical school researchers could have implications for human health, too. http://www.physorg.com/news150651380.html Biology Thu, 08 Jan 2009 15:36:20 EST news150651380 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. http://www.physorg.com/news149769761.html Medicine & Health Mon, 29 Dec 2008 10:42:41 EST news149769761 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. http://www.physorg.com/news139574600.html Medicine & Health Tue, 02 Sep 2008 11:43:20 EST news139574600 UC Irvine researchers have found a molecular link between circadian rhythms - our own body clock - and metabolism. The discovery reveals new possibilities for the treatment of diabetes, obesity and other related diseases. http://www.physorg.com/news136122147.html Medicine & Health Thu, 24 Jul 2008 12:42:27 EST news136122147 Dr. C. Robertson McClung and his colleagues are investigating the genetic basis and molecular mechanisms of circadian cycling and regulation in plants. Dr. McClung, of the Department of Biological Sciences, Dartmouth College, will be presenting this work at the President's symposium of the annual meeting of the American Society of Plant Biologists in Mérida, Mexico. http://www.physorg.com/news134107649.html Biology Tue, 01 Jul 2008 05:07:29 EST news134107649