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Latest period Stories

2011-09-07 11:15:29

Do animals that have evolved for millions of years underground, completely isolated from the day-night cycle, still "know" what time it is? Does a normal circadian clock persist during evolution under constant darkness? A new study directly tackles these fundamental questions by investigating a species of cavefish, Phreatichthys andruzzii, which has lived isolated for 2 million years beneath the Somalian desert. Many fish species have evolved in the absence of sunlight in cave systems around...

2011-09-01 16:43:39

Yale University researchers have identified a key genetic gear that keeps the circadian clock of plants ticking, a finding that could have broad implications for global agriculture. The research appears in the Sept. 2 issue of the journal Molecular Cell. "Farmers are limited by the seasons, but by understanding the circadian rhythm of plants, which controls basic functions such as photosynthesis and flowering, we might be able to engineer plants that can grow in different seasons and...

2011-07-21 13:08:05

Humans and zebrafish share mechanisms that regulate our circadian system, says TAU researcher Circadian rhythms "” the natural cycle that dictates our biological processes over a 24-hour day "” does more than tell us when to sleep or wake. Disruptions in the cycle are also associated with depression, problems with weight control, jet lag and more. Now Prof. Yoav Gothilf of Tel Aviv University's Department of Neurobiology at the George S. Wise Faculty of Life Sciences is looking to...

2011-02-16 17:13:05

Scientists identify a gene important for the daily rhythms of the sleep-wake cycle Northwestern University scientists have discovered a new mechanism in the core gears of the circadian clock. They found the loss of a certain gene, dubbed "twenty-four," messes up the rhythm of the common fruit fly's sleep-wake cycle, making it harder for the flies to awaken. The circadian clock drives, among other things, when an organism wakes up and when it sleeps. While the Northwestern study was done using...

2010-12-29 13:54:04

In a new paper published this week in the Proceedings of the National Academy of Sciences, Aziz Sancar, MD, PhD, the Sarah Graham Kenan Professor of Biochemistry and Biophysics in the UNC School of Medicine, and his colleagues have taken an important step in understanding the underlying molecular signals that influence a broad array of biological processes ranging from the sleep-wake cycle to cancer growth and development. Scientists who work in this field, known as chronobiology, have...

2010-12-02 00:45:37

A gene that controls part of the 'tick tock' in a plant's circadian clock has been identified by UC Davis researchers. And not only is the plant gene very similar to one in humans, but the human gene can work in plant cells -- and vice versa. The research is published this week in the journal Proceedings of the National Academy of Sciences. "It's surprising to find a clock gene that is performing the same function across such widely unrelated groups," said Stacey Harmer, associate professor...

2010-11-16 12:50:13

UCI study opens new avenue for obesity and diabetes drug development UC Irvine researchers have discovered that circadian rhythms "” the internal body clock "” regulate fat metabolism. This helps explain why people burn fat more efficiently at certain times of day and could lead to new pharmaceuticals for obesity, diabetes and energy-related illnesses. The study was headed by Paolo Sassone-Corsi, Donald Bren Professor and chair of pharmacology. A leading expert on circadian...

2010-11-12 12:34:50

Researchers in France have uncovered a mechanism which explains how biological clocks accurately synchronize to the day/night cycle despite large fluctuations in light intensity during the day and from day to day. Following the identification of two central "clock genes" of a green alga, Ostreococcus tauri, a mathematical model reproducing their daily activity profiles has revealed that their internal clock is influenced by the naturally varying light levels throughout the day only at periods...

2010-10-20 19:01:57

Concordia research looks at role of dopamine in the rhythms of daily behavior; may have impact on activity and sleep rhythms in Parkinson's disease Daily sleeping and eating patterns are critical to human well-being and health. Now, a new study from Concordia University has demonstrated how the brain chemical dopamine regulates these cycles by altering the activity of the "clock-protein" PER2. Published in the Journal of Neuroscience, these findings may have implications for individuals with...

2010-08-25 01:55:06

    * Circadian clock genes are key to regulating physiological and behavioral activities.    * Animal studies have shown that chronic drinking can disrupt expression in these genes.    * A human study has found an association between dysregulation of circadian clock genes and chronic drinking. Circadian rhythmicity is regulated by circadian clock genes, and animal studies have shown that chronic drinking can alter expressions in these genes. A new...


Word of the Day
cenobite
  • One of a religious order living in a convent or in community; a monk: opposed to anchoret or hermit (one who lives in solitude).
  • A social bee.
This word comes from the Latin 'coenobium,' convent, which comes from the Greek 'koinobios,' living in community.
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