Cloning reverses aging in cow cells, a milestone in medical research
...y used a new cloning technique to rewind the aging clock in cells. The clock is considered to be the strand of DNA at the end of each chromosome (called telomeres), and is short...Northwestern team identifies first enzyme in mammalian circadian clock
...d the first enzyme to play a role in the circadian clock of mammals. The team's findings are detailed in th...y contributes another known piece to the circadian clock puzzle and should help increase researchers' understanding of circadian rhythm-related problems in h...Fox Chase Cancer Center molecular biologist named V Foundation Scholar
...rrent hypothesis is that telomere length acts as a clock to limit the total number of divisions any cell is capable of achieving. This limitation on cell growth and renewal is believed to contribute to human aging. Activation of telomerase and stabilization of telomeric DNA circumvents this restra...Researchers identify unique circadian rhythm photoreceptor
...s exposed to constant, intense light, the internal clock goes haywire, losing all sense of night and day. F...s a strain of mutant flies that maintains a steady clock when barraged with intense light. The flies carry a crippled light-reactive pigment called a crypt...Reports of "weird life" almost stranger than fiction
...need some heat to keep alive." But what makes the clock stop altogether is dehydration, said James Clegg f...either dead nor alive,"said Clegg, "What makes the clock go is water." Based on the "weird life"they've found on earth, many of the scientists expressed pla...Researchers identify molecule crucial to adjusting bodys internal clock
CHAMPAIGN, Ill. - Is your biological clock out of kilter? Researchers say they have identifi...'s lab in 1994 reported that glutamate adjusts the clock in the presence of light atnight. "PACAP fine tunes the glutamate signal," she said. "Together the...When sperm whales talk, UW researcher listens
...ith. "It's very regular - it sounds almost like a clock ticking." In addition, the clicks travel well in sea water, allowing scientists to tune in from a distance and listen to more than one whale at a time. Dougherty's process can differentiate among individuals in a group. "Acoustic identification can ...Errant nerve cells risk a clockwork death
...ng along the spinal cordliterally race against the clock to create connections within the developingnervous system. Newly published studies by investigators at the Howard HughesMedical Institute (HHMI) at the University of California, San Francisco (UCSF),show that growing neurons must reach a specific int...Experiments illuminate workings of biological clocks
... light causes cells to break down a key biological clock protein called"timeless." Biological, or circadia...ical mechanism that reduces levelsof TIM, a key to clock synchrony. Light itself doesn't directly reset the clock. Rather, light strikesphotoreceptors in a ...Molecular inner workings of fruit fly clock explained
...it fly controls the synchronization of itsinternal clock to cycles of light and dark. Life forms -- bacteri...work, Sehgal and her team found that the fruit fly clock iscontrolled by the cycling of two proteins called TIM and PER. Their amounts riseduring the day, fo...Researchers discover genetic basis of heritable sleep disorder
...elpus determine how the body's internal biological clock works," saidPtácek, whose research team pub...clock synchronized to a 24-hour day. This internal clock controls a variety ofdaily biochemical and behavioral cycles -- including fluctuations in sleep andw...Particulate matter causing air pollution
...orgia Power. They began measuring PM 2.5around the clock at 7 a.m. Aug. 3 and will continue through 7 a.m. Sept. 1. "We are trying to determine how to measure the concentration andcomposition of fine particulate matter in the atmosphere and the types ofinstruments best suited to do that," said...Response to cocaine linked to biological clock genes
...ain. "These important findings illustrate that the clock genes perform otherimportant roles in regulating the physiology of fruit flies, and likely humans,"said Dr. Michael Sesma, a neurobiologist at the National Institute of GeneralMedical Sciences, an NIH component that funded the study along with NIH'sN...Plants, pathogens engage in trench warfare
...evolutionary time, and serve as akind of molecular clock that gives researchers clues as to the age of alleles. The more polymorphisms, the older the alleles. Bergelson's new analysis found that the number of polymorphisms was much higherthan would be predicted by the arms race hypothesis, where resistance...Researchers find missing spring in circadian clock of mammals
..., bacteria, and molds - have an internalbiological clock that drives them to be active during certain phase...ng humans,tick. So how does our 24-hour biological clock work? To date most of our insights intothis problem have come from studies of the clock in fruit fli...SIDS prevention tactic leads to epidemic of 'misshapen head' in infants
...a custom-made "helmet" -- worn virtuallyaround the clock for four months -- to help reform his head and reposition hisfeatures. Treatment of the condition includes neck physical therapy to correct themuscular torticollis along with repositioning techniques and/or helmet therapyto correct the head shape. Co......ng from 6 p.m. to 7 a.m. weeknights and around the clock onweekends and holidays, they provide critical care each year for about 25 foalsless than 30 days old. Ill baby animals may require multiple treatments to help them, includingblood transfusions, infusions of plasma with proteins and oxygen th......t callsinto question the use of a strict molecular clock to date the origins of majorbiologic groups." The trigger for the study was a paper published in the April 30, 1998, issue ofthe journal Nature, written by Sudhir Kumar and S. Blair Hedges of PennsylvaniaState University. Kumar, Hedges and other scie...Scientists Discover Key Cog In Receptor That Governs Ripening
..."It's a kind of tinkering, like figuring out how a clock or a watch works,"Bleecker said. The finding "tells us how the system works at a chemical level." Because plants produce the hormone at such low levels, there has been a greatdeal of curiosity to know just how plants are able to detect it. "It's tric...Baby Dolphin "Little Orphan Annie" Loses Battle For Her Life
...arbor Branch, "Annie" received constant around the clock care andobservation from a very dedicated and professional staff. Although "Annie's"chances, like many stranded dolphin, were less than 2% from the outset, HarborBranch made every effort to provide for her recovery. Stephen McCulloch, Harbor Branch D...