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    circadian rhythm tagged posts

    Powering up the Circadian Rhythm

    May 29, 2016, Categories  Biology/Biotechnology, Health/Medical

    Researchers led by the Salk Institute are the first to discover a protein that controls the strength of the body's circadian rhythms. A mouse liver with a "weak" circadian clock, caused by the targeted deletion of FBXW7 (right), has disrupted the lipid metabolism program and promoted lipid accumulation, compared to the normal liver (left). Credit: Salk Institute

    Researchers led by the Salk Institute are the first to discover a protein that controls the strength of the body’s circadian rhythms. A mouse liver with a “weak” circadian clock, caused by the targeted deletion of FBXW7 (right), has disrupted the lipid metabolism program and promoted lipid accumulation, compared to the normal liver (left). Credit: Salk Institute

    At noon, 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...

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    Rotation Speed may be bad news for Mars pioneers

    January 25, 2016, Categories  Astronomy/Space, Biology/Biotechnology, Health/Medical

    We really can’t have our astronauts getting loopy after just a few weeks on-planet, though, so researchers have been trying to find a way to re-program the body’s sleep cycle to the Martian standard. One method showing promise is the use of light-therapy — not just using bright light to knock the rhythm off kilter, but using the light’s specific wave-length as well. Extending the human sleep cycle might be as simple as exposing an astronaut to pale blue light at the end of their day. They hope to continue their research and determine which wavelengths have have an effect and what that is at different times of the day.

    We really can’t have our astronauts getting loopy after just a few weeks on-planet, though, so researchers have been trying to find a way to re-program the body’s sleep cycle to the Martian standard. One method showing promise is the use of light-therapy — not just using bright light to knock the rhythm off kilter, but using the light’s specific wave-length as well. Extending the human sleep cycle might be as simple as exposing an astronaut to pale blue light at the end of their day. They hope to continue their research and determine which wavelengths have have an effect and what that is at different times of the day. http://www.geek.com/science/mars-explorers-may-suffer-never-ending-jet-lag-1616740/

    New research reveals the importance of a circadian body clock that matches the r...

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    Mice suffer from a Decrease in Biological Fitness if their Internal Clock is Mixed Up

    December 31, 2015, Categories  Biology/Biotechnology, Health/Medical

    Mice suffer from a decrease in biological fitness if their internal clock is mixed up

    For more than a year scientists investigated the development of six groups of mice in an outdoor enclosure. Credit: © MPI f. Ornithology

    Mice with deviant internal rhythms due to a genetic mutation have fewer offspring and shorter life spans than normal conspecifics whose rhythms follow the 24hr cycle of a day more accurately. This discovery was made by a team of scientists led by researchers from the Max Planck Institute for Ornithology and Princeton University. Almost all living things possess internal clocks that govern periods of sleep and waking, and ensure these processes are in synchrony with night and day. This circadian clock evolved to allow the anticipation of regular daily events. Sunlight aligns the internal clock with the 24-hr-rhythm of the rotation of the earth.

    Mutations ...

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    Circadian Rhythm of Genes in Brain Changes with Aging, research shows

    December 23, 2015, Categories  Biology/Biotechnology, Health/Medical

    Examination of thousands of genes from nearly 150 human brains shows the circadian rhythm of gene activity changes with aging, according to a first-of-its-kind study conducted by researchers at the University of Pittsburgh School of Medicine. It suggest also that a novel biological clock begins ticking only in the older brain.

    A 24hr circadian rhythm controls nearly all brain and body processes, such as the sleep/wake cycle, metabolism, alertness and cognition. These daily activity patterns are regulated by certain genes that are found in almost all cells, but have rarely been studied in the human brain. “Studies have reported that older adults tend to perform complex cognitive tasks better in the morning and get worse through the day,” Dr. McClung said...

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