Tag: "clocks" at biology news
Clocking in and out of gene expression
... monthly and even yearly clock and that cells have clocks
as well, said Dr. Bert OMalley, chair of molecular...said that we are made up of 25,000 genes that have clocks
too. Genes get expressed and carry out their functions through proteins, he said. Gene expression i...
Caribbean frogs started with a single, ancient voyage on a raft from South America
... species with molecular-clock methods. "Molecular clocks
work by counting the number of DNA-sequence mutations separating two species and then dividing that number by the rate of change, which is established with the help of fossils and geologic information," explained Hedges. The study's DNA research re...
Jet lag: It's all about chemical reactions in cells
regulate the timing of biological functions in alm...ains the biological mechanism behind how circadian clocks
sense light through a process that transfers energy from light to chemical reactions in cells. The r...
Clock gene plays role in weight gain, study finds
...ecome a major issue in modern society." Biological clocks
are the bodys internal timekeepers that regulate organs and activity/rest cycles by controlling energy levels, alertness, growth, moods and the effects of aging. Research in this field has many health implications for dealing with aging, jet lag, sle...
Networking around the clock
...ing cells like darkness and they become the master clocks
in winter, and the evening cells process light information, so they become the masters in the summer, though it all may happen gradually. We don't know how the switch from slave to master actually happens, but at some point, one type of cell appears ...
Researchers figure out what makes a simple biological clock tick
...rnal Public Library of Science Biology. Biological clocks
are microscopic pacemakers. They are found in everything from pond scum to human beings and appear to help organize a dizzying array of biochemical processes. A traveler experiences jet lag when his or her internal clock becomes out of synch with the...
Blood's clotting cells harbor 'ticking time bombs,' finding may help extend blood supply
...ood clots and assist in wound healinghave internal clocks
that act like ticking time bombs, predetermining t...hat chemical treatments that effectively set those clocks
back might increase the shelf life of donated blood platelets, which expire after just five days und...
Gene controlling circadian rhythms may be involved in onset of bipolar disorder
...07 Disrupt the gene that regulates the biological clocks
in mice and they become manic, exhibiting behaviors similar to humans with bipolar disorder, UT Southwestern Medical Center researchers have found. In a study available online in the Proceedings of the National Academy of Sciences , scientists fro...
Steroid hormones regulate the body clock
... behavior and hormone release. However, biological clocks
are also encountered in almost every cell type (so...Planck Institute in Tuebingen find that peripheral clocks
require the steroid hormone cortisol to generate daily rhythms of cell proliferation. Their work is ...
Keeping the body in sync -- the stability of cellular clocks
...ses the tools of physics to show how our circadian clocks
manage to keep accurate time in the noisy cellular...ipheral organs in the body have their own cellular clocks
that are reset on a daily basis by a central master clock in the brain. The operation of the cellula...
Researchers publish first working model that explains how biological clocks work
Science has known for decades that biological clocks
govern the behavior of everything from humans to l...e first working model that explains how biological clocks
work. "When the clock goes awry in mammals, it can lead to many diseases, ranging from cancer and ...
Animal studies in the land of the midnight sun illuminate biological clocks
...stions may improve our understanding of biological clocks
-- the internal, genetically programmed cycle of r...not exactly, 24 hours. Importantly, all biological clocks
are adjustable and respond to environmental cues such as sunrise or sunset, which continuously reset...
How does your brain tell time?
...f we didnt have access to the plethora of watches, clocks
and cell phones at our disposal? For...ut the brain, and do not resemble the conventional clocks
we wear on our wrists," said Buonomano. Because time-related information is critical to understand...
Central and peripheral signals set the circadian liver clock
...ripheral tissues are controlled by local circadian clocks
or by systemic cues that are directly or indirectl...ted a mouse strain with conditionally active liver clocks
that they could turn on or off at will. The authors modified a transcription factor called REV-ERB...
Gene that makes people 'early to bed and early to rise' demystified
...ps to explain just how their bodies' natural alarm clocks
get set to such an early wake-up time. In studies...middle of the night, to synchronize their internal clocks
with their regular or changing daily routines, the researchers said. Someday "people with jet lag o...
Researchers find biological clock for smell in mice
...l time, and then there are all of these peripheral clocks
for timing tasks like sleep-wake, vigilance, dig...h not all yet found. It may be that the peripheral clocks
are like individual wristwatches that we must periodically reset." Perhaps most surprising is the o...
CGIAR climate change research
...ts, like humans and other organisms, have internal clocks
that tell them when to flower by taking cues from the length of daylight. During the Green Revolution, breeders of many grains eliminated photoperiod sensitivity so that plants could be grown anywhere, anytime. The catch was that these non-photoper...
Protein shown to rally biological clock
...n the other. Together these neurons are intrinsic clocks
in communication with each other to keep 24-hour time. It had been thought that GABA was the prime candidate for the rallying role. All SCN neurons make this inhibitory neurotransmitter, and it had been shown that giving GABA daily at 8 a.m. to SC...
Chronic jet-lag conditions hasten death in aged mice
...omplex. Past research has indicated that circadian clocks
govern physiological rhythms in a great variety of tissues in the body, and that different aspects of the physiological clock can adjust to schedule changes at different rates. The researchers speculate that the internal lack of synchrony among diffe...
Biological clock of honey bee more similar to humans than to insects
...l questions concerning the evolution of biological clocks
and the significance of differences in the organization of the clock in different creatures. For example, why is the clock of bees closer to humans than that of flies? Is the similarity between bees and mammals related to the behavioral complexity of...
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