Tag: "lee" at biology news

Acute sleep deprivation leads to changes in nighttime urine production for men and women

Austin, TX -- Our body's production of urine follows a circadian rhythm. During the day, we experience greater urinary frequency; at night, urine production declines, enabling us to get uninterrupted sleep. The regulation of urine excretion during nighttime hours is influenced by many factors, including hormones, blood flow (hemodynamics), and sleep-related factors. The mechanism behind the day/...

University of Leeds strengthens China links in membrane and neurobiology

... ... T...

Better sleep may put Huntington's disease sufferers back on track

... ... According to the Cambridge neuroscientists conducting the research, HD mice have abnormal circadian rhythms; t...

New research seeks to enhance alternative fuel integration in public vehicle fleets

... RITs Center for Integrated Manufacturing Studies will work with the County Department of Environmental Services to analyze the environmental and economic impact of these vehicles and assist the county in determining a future course for the integration of additional alternative en...

Chronically sleep deprived? You can't make up for lost sleep

... It is well established that following an acute period of sleep loss, the body responds this way in order to maintain a homeostatic balance between sleep and wakefulness. Very little is known, however, about the health consequences of chronic partial sleep loss...

Slow wave activity during sleep is lower in African-Americans than Caucasians

... Dr. Esra Tasali and colleagues at the University of Chicago collected overnight polysomnographic data from 12 African-Americans and 12 Caucasians, none of whom had any sleep com...

Sleep deprivation affects airport baggage screeners' ability to detect rare targets

... Nayantara Santhi, MD, of Brigham & Womens Hospital in Bo...

Sleep apnea increases risk of diabetes and hypertension in pregnant women

ATS 2007, SAN FRANCISCOSleep apnea is associated with a greatly increased incidence of pregnancy-induced diabetes and high blood pressure, according to a study presented at the American Thoracic Society 2007 International Conference, on Wednesday, May 22.... The study found that when the womens weight was taken into account, sleep apnea was associated with a doubling of the incidence of gestati...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

... ... "When flies get sick, they stop sleeping," said David Schneider, PhD, assistant professor of microbiol...

Pioneering research on sleeping sickness wins MERIAL Award for Parasitology

Brussels, Belgium -- Stefan Magez, a VIB researcher connected to the Vrije Universiteit Brussel, has won this years MERIAL Award for Parasitology. For a number of years now, he has been studying the parasite that causes sleeping sickness (African trypanosomiasis). This deadly disease strikes about 300,000 new patients each year, thousands of whom die. Not only is Stefan Magez trying to discover...

Sleep enforces the temporal sequence in memory

... Previous findings from a research group headed by Jan Born at the University of Lbeck have confirmed the widely held view that long-term memories are formed particularly during sleep, and that this process relies on the brain replaying recently encoded experiences during the night. The same research group now provides...

Misclassified for centuries, medicinal leeches found to be 3 distinct species

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To sleep, perchance to dream: New insight into melatonin production

... Melatonin is a hormone produced by the pineal gland in the brain, which helps to regulate our bodies' circadian rhythm (the roughly-24-hour cycle around which basic physiological processes proceed). Normally, melatonin production is inhibited by light and enhanced by darkness, usually peaking in the middle of the night. Melatonin's expression pattern is mimicked by a protein called AANAT,...

The great escape -- fleeing fish fall in line

... Scientists mimicked an aerial predator at...

Laying sleeping sickness to rest

... Shulamit Michaeli and colleagues describe a pathway in T. brucei parasites that they named SLS (SL-RNA silencing). Triggering this pathway shuts down the synthesis of a crucial RNA molecule, which halts the production of messenger RNAs and leads to the parasites death. Inducing SLS could therefore be a...

Individual differences in a clock gene predict decline of performance during sleep deprivation

... There are two variants of the PERIOD3 gene foun...

Leeches ferry infection among newts

Parasite-carrying bloodsucking leeches may be delivering a one-two punch to newts, according to biologists, who say the discovery may provide clues to disease outbreaks in amphibians. ... The findings could also lead to a better understanding of diseases affecting humans, such as malaria, chagas disease and sleeping sickness. All these diseases are transmitted through a vector, an organism that...

Journal Sleep: Narcolepsy may be caused by environmental exposures

... Will Longstreth Jr., MD, MPH, and colleagues at the University of Washington identified and assessed studies previously conducted by other r...

First biomarker for human sleepiness identified in fruit flies

Scientists have identified the first biochemical marker linked to sleep loss, an enzyme in saliva known as amylase, which increases in activity when sleep deprivation is prolonged. ... Researchers hope to make amylase the first of a panel of biomarkers that will aid diagnosis and treatment of sleep disorders and may one day help assess the risk of falling asleep at the wheel of a car or in other...

New study suggests promising drug combinations for sleeping sickness

Results from a clinical trial evaluating new drug combinations for ...sleeping sickness, carried out by the international humanitarian ...medical aid agency Medecins Sans Frontieres (MSF), and its research ...arm, Epicentre, have now been published in the journal PLoS Clinical ...Trials. ... African trypanosomiasis, or sleeping sickness affects many tens of ...thousands of people each year in s...

Learning during sleep?

If I can't remember this morning where I put my car keys last night, it's due to my memory failing me again. Scientists at the Max Planck Institute for Medical Research in Heidelberg have been investigating how memories might be consolidated. Their new study offers the hitherto strongest proof that new information is transferred between the hippocampus, the short term memory area, and the cerebr...

When Gleevec is not enough

... Th...

Resistance and genetic sensitivity to sleeping sickness

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MIT material stops bleeding in seconds

... ... "We have found a way to stop bleed...

Drug can reduce severe bleeding in mothers who have just given birth

... Every year half a million women die worldwide from pregnancy-related causes. Haemorrhage after delivery is the most common cause of maternal mortality, responsible for one in three of these deaths. 99% of these deaths occur in the developing world where women frequently deliver in rural settings in the absence of any medical staff or...

Leeds Teaching Hospitals NHS Trust to host press conference call/webcast on data published in NEJM

... ... ... ... How: Live over t...

Single genetic assay could help physicians decide when to switch patients from Gleevec to Sutent

... ... This means, the researchers say, that a single genetic assay could potentially help physicians decide when to switch patients from Gleevec, the first-line treatment, to therapy with Sutent, which the F...

Can Gleevec help patients with rheumatoid arthritis?

... Although there are two documented cases in which individuals taking imatinib to treat thei...

Sleep strengthens memories and makes them resistant to interfering information

... Whether sleep facilitates memory consolidation is a question as old as the experimental study of memory itself. In r...

Sleepy fruit flies provide clues to learning and memory

(Philadelphia, PA) Researchers at the University of Pennsylvania School of Medicine have discovered that a brain region previously known for its role in learning and memory also serves as the location of sleep regulation in fruit flies. Through further examination of this brain structure, researchers hope to shed light on sleep regulation and its role in memory....... Despite its importance in e...

Drug that battles resistance to leukemia pill Gleevec 'extremely effective' against cancer

An experimental therapy that battles drug resistance in Chronic Myeloid Leukemia (CML) has proved "extremely effective" in fighting cancer, giving patients for whom all conventional therapies have failed another option, researchers at UCLA's Jonsson Cancer Center reported....... The Bristol-Myers Squibb therapy, Sprycel (dasatinib), treats CML that has mutated and becomes resistant to the leukem...

How ancient whales lost their legs, got sleek and conquered the oceans

When ancient whales finally parted company with the last remnants of their legs about 35 million years ago, a relatively sudden genetic event may have crowned an eons-long shrinking process....... An international group of scientists led by Hans Thewissen, Ph.D., a professor of anatomy at Northeastern Ohio Universities College of Medicine, has used developmental data from contemporary spotted dol...

A broken stress response system can contribute to Gleevec resistance

New clues to why some kinds of leukemia are more aggressive and deadly than others are coming from research examining the types of genetic damage that allow some blood cells to grow out of control, scientists report. ...According to Charles J. Sherr, a Howard Hughes Medical Institute researcher at the St. Jude Children's Research Hospital in Memphis, Tennessee, his team's new findings may help d...

Help for bleeding hearts: New research links a third protein to blood-clotting disorders

Studying receptors on the surface of blood platelets, sticky cells that cause blood to clot, has given one Rockefeller researcher new insight into potential causes and treatments for certain cardiovascular diseases. Barry Coller, David Rockefeller Professor and the university's physician-in-chief, has been focusing on a rare disorder known as Glanzmann thrombasthenia, in which platelets lack one...

People with near death experiences can differ in sleep-wake control

People who have had near death experiences often have different arousal systems controlling the sleep-wake states than people who have not had a near death experience, according to a new study published in the April 11, 2006, issue of Neurology, the scientific journal of the American Academy of Neurology. ...... For the study, a near death experience was defined as a time during a life-threatenin...

A large step forward in the fight against African sleeping sickness

Each year, over 300,000 people die of African sleeping sickness (trypanosomiasis). Researchers from the Flanders Interuniversity Institute for Biotechnology (VIB) connected to the Free University of Brussels are making strides in the battle against this disease. They have coupled the human protein ApoL-1 with a nanobody in order to very specifically eliminate the infection caused by the pathogeni...

Carbon monoxide inhibitor controls traumatic bleeding, Tulane University researchers show

SAN FRANCISCO A chemical that blocks carbon monoxide (CO) has been used for the first time to arrest traumatic bleeding in rats, according to a Tulane University research team....... The study of CO in the tissues -- including its role in diabetes, cardiac dysfunction, hypertension and asthma -- has become the subject of increasing interest for researchers. However, this is the first time scient...

Researchers look to the brain to explain gender differences in sleep apnea

The neural pathways between two areas of the brain that control the tongue -- and their interactions with each other -- may hold the key as to why men suffer sleep apnea much more than women....... A University of Wisconsin research team has theorized that either the caudal raphe or the hypoglossal nucleus -- or both together -- play roles in sleep apnea. The researchers have turned their attenti...

Asleep or awake we retain memory

Sleeping helps to reinforce what we've learned. And brain scans have revealed that cerebral activity associated with learning new information is replayed during sleep. But, in a study published in the open access journal PLoS Biology, Philippe Peigneux and colleagues at the University of Liege demonstrate for the first time that the brain doesn't wait until night to structure information. Day a...

Infused spleen cells found not to impact islet recovery and reversal of type 1 diabetes in mice

BOSTON Researchers from Joslin Diabetes Center have published in the March 24, 2006, issue of the journal Science a significant study about islet cell recovery and reversal of type 1 diabetes in mice. ... ...It is generally believed that an effective cure for type 1 diabetes will require two substantial scientific advances. First, in order to restore the pancreas' ability to produce insulin, new...
(Date:8/19/2014)... of Texas Health Science Center at San Antonio and ... announced the awarding of more than $750,000 in grants ... Challenge. , Launched in 2003, SALSI is a model ... academic health science center join forces for greater research ... studies, with a focus on public health issues and ...
(Date:8/19/2014)... a nearly $40,000 grant from the National Center for ... National Park Service (NPS) and U.S. Department of the ... the energy efficiency and cost effectiveness of radiant barrier ... Radiant barriers are reflective thermal insulations commonly fitted into ... the amount of heat emitted in the direction of ...
(Date:8/19/2014)... Rochelle, August 19, 2014A new ovoid structure discovered in ... clay, contains a variety of minerals, and shows evidence ... resulting melting of the permafrost and mixing of surface ... broad range of analytical studies to determine the origin ... for how this ovoid formed, point to the most ...
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