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2010-03-19 10:26:03

Cell division in cyanobacteria controlled by same kind of circadian rhythms that govern human sleep A team of researchers at MIT and the University of California at San Diego has shown how cell division in a type of bacteria known as cyanobacteria is controlled by the same kind of circadian rhythms that govern human sleep patterns. Previous studies have shown that even though cyanobacteria do not "sleep" in the same way that humans do, they cycle through active and resting periods on a...

2009-12-06 13:47:57

New research extends circadian clock repertoire into metabolism 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. These research results, which extend the circadian clock repertoire into metabolism, will be reported at the American Society for Cell Biology (ASCB) 49th Annual...

2009-11-30 16:05:21

How does our biological system know that it is supposed to operate on a 24-hour cycle? Scientists at the Hebrew University of Jerusalem have discovered that a tiny molecule holds the clue to the mystery. Human as well as most living organisms on earth possess circadian a (24-hour) life rhythm. This rhythm is generated from an internal clock that is located in the brain and regulates many bodily functions, including the sleep-wake cycle and eating. Although the evidence for their existence is...

2009-11-25 10:03:18

Cycles of feeding and fasting drive circadian gene expression in the liver When you eat may be just as vital to your health as what you eat, found researchers at the Salk Institute for Biological Studies. Their experiments in mice revealed that the daily waxing and waning of thousands of genes in the liver"”the body's metabolic clearinghouse"”is mostly controlled by food intake and not by the body's circadian clock as conventional wisdom had it. "If feeding time determines the...

2009-11-12 22:36:24

A paper by University of Notre Dame biologist Giles Duffield and a team of researchers offers new insights into a gene that plays a key role in modulating the body's Circadian system and may also simultaneously modulate its metabolic system. The relationship between circadian and metabolic systems the researchers describe could have important implications for understanding the higher incidence of cardiovascular disease, obesity and diabetes among shift workers. The master circadian clock in...

2009-11-12 08:59:08

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. Alexander Niculescu from Indiana University School of Medicine, Indianapolis, US, worked with a team of researchers at Harvard, UC San Diego, Massachusetts General Hospital and SUNY Upstate Medical University to study the RORA and RORB genes...

2009-10-28 21:55:21

New research reveals a pathway that links peripheral sensory tissues with a "clock" in the brain to regulate molecular processes and behaviors in response to cyclical temperature changes. The research, published by Cell Press in the October 29th issue of the journal Neuron, reveals some surprising fundamental differences between how light-dark and temperature cycles synchronize the brain clock of the fruit fly, Drosophila. A variety of organisms have evolved an endogenous timing system called...

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2009-10-09 10:15:00

The findings of a study published in Science today (October 9th 2009) turn a long-held theory on circadian rhythms on its head and mean that we may now be able to develop new drugs and approaches to tune the daily clock to treat sleep disorders and to aid recovery from long-distance flights. Dr Hugh Piggins and Dr Mino Belle from the University of Manchester tested mathematical predictions made by Dr Daniel Forger and his PhD student Casey Diekman at the University of Michigan. Using...

2009-09-01 09:05:24

Japanese and U.S. scientists say they've identified an enzyme that can be inhibited to extend the circadian 24-hour metabolic cycle to more than 48 hours. The scientists said the circadian clock has long been known to play a central role in regulating the daily activities of living organisms. But its detailed biochemical mechanisms have largely remained unidentified. Researchers at the Riken Center for Developmental Biology in Tokyo, led by Hiroki Ueda and Northwestern University Professor...

2009-07-02 10:59:36

The ability of plants to tell the time, a mechanism common to all living beings, enables them to survive, grow and reproduce. In a study published in the latest issue of the prestigious journal Ecology Letters, an international team has studied this circadian clock from a molecular viewpoint and has found an ecological implication: it makes climate change scenarios and CO2 level figures more accurate.The international team of researchers led by the University of Castilla-La-Mancha (UCLM) has...


Word of the Day
bodacious
  • Remarkable; prodigious.
  • Audacious; gutsy.
  • Completely; extremely.
  • Audaciously; boldly.
  • Impressively great in size; enormous; extraordinary.
This word is probably from the dialectal 'boldacious,' a blend of 'bold' and 'audacious.'
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