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Tag: "stress" at biology news

Growth in the sea comes down to a struggle for iron

...swered is why the diatoms showed signs of nutrient stress before the iron and other nutrients were used up. Wells and his colleagues think they may know. For clues, they have looked to a discipline that is far removed from the sea. Soil contains lots of iron, but most of it stays locked up in minerals, as ...

Researchers discover molecule that causes secondary stroke

...on between elevated BOXes, bilirubin and oxidative stress in this study, she says, was "striking." The researchers point out that although their findings are encouraging in terms of developing a diagnostic test and treatment, the number of patients in their study was small and more work is needed to confir...

Research Using Mouse Models Reveals A Novel Key Player In The Initiation Of Colon Cancer

...h Familial Adenomatous Polyposis, or environmental stress that generates a spontaneous mutation in the APC gene, mutations in the Foxl1 gene or its targets may dramatically increase the likelihood that the second normal copy of the APC gene is lost or mutated, leading to the initiation of tumor formation. ...

Special Imaging Study Shows Failing Hearts Are 'Energy Starved'

... CK flux at rest and with pharmaceutically induced stress to determine whether increased energy demand during stress increases the rate of ATP synthesis through CK. Then, 17 patients with histories of heart failure ...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

... cognitive vulnerability that appears later during stress on the immune system. Researchers at the University of Colorado at Boulder have reported that rats who experienced a one-time infection as newborns didn't learn as well as adult rats who were not infected as pups, after their immunity was challenged....

Live fast, die young true for forests too

...ost attention so far has been given to things that stress forests, like increased drought," said USGS scientist Phil van Mantgem, the study's co-author. "Less attention has been given to the consequences of changes that can increase forest vigor or productivity, like increased rainfall." Environmental cha...

Multi-purpose protein regulates new protein synthesis and immune cell development

... "All these things disrupt protein folding and put stress on the cell. By doing so, they activate the UPR." Several years ago, Kaufman and his research colleagues discovered that IRE1 triggers the unfolded protein response by splicing a segment of messenger RNA called XBP1. This leads to production of a ne...

Products containing specific probes for detecting alternative splice forms protected

...numerous pathologies and can be altered by various stress events such as virus, toxic agents, and drug exposure. The genome-wide patented probe configuration described in the patent is the basis for the microarrays in ExonHit's SpliceArray product line launched earlier this year. The genome profiling marke...

Study reveals new technique for fingerprinting environmental samples

...gerprints can be used to reveal environments under stress as well as signal progress in remediating contaminated environments. This may well develop environmental ecology into a fully quantitative science." Dubbed Environmental Genomic Tags, or EGTs, these indicators capture a DNA profile of a particular n...

Shift of weather patterns necessitates rethinking of reforestation methods

...'ve had a chance to acclimate and recover from the stress of planting. Rethinking planting time could remedy the loss due to droughty conditions, Taylor said. Traditional methods prescribe planting in the winter, but conditions ?primarily soil moisture and availability of planting crews ?may mean planting ...

Live vaccines more effective against horse herpes virus

...s from the initial infection can be reactivated by stress later in life. Osterrieder will present his new findings on vaccine effectiveness, involving a limited study of 15 horses, at a luncheon meeting with other veterinarians and specialists at the annual American College of Veterinary Internal Medicine ...

Insight into DNA's 'weakest links' may yield clues to cancer biology

...particularly prone to breaking under conditions of stress and in cancer. Now, new research by geneticists at...s break at particular sites under certain types of stress or upon exposure to particular drugs, he said. Evidence has suggested that chromosomes break when DN...

A little stress gives beneficial oomph! to immune system

...n mice provides more evidence that a brief bout of stress can give the immune system a beneficial boost ?und... conditions. Laboratory results showed that acute stress ?stress that lasts for minutes to hours ?temporarily mobilized all major types of immune cells, or l...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...t economically, and they're already under a lot of stress from overfishing and aquaculture. It is possible that agricultural runoff could cause additional stress if it does lead to toxic blooms or hypoxia." She and her colleagues plan to conduct follow-up studi...

Putting ecology back into river restoration

...r fish populations and clearer water. Palmer et al stress that restoration success should not be viewed as an all-or-nothing, single endpoint, but as an adaptive process where small improvements build up and lessons are learned from any failures. The third criteria for successful river restoration is to cr...

Signs of aging: Scientists evaluate genes associated with longevity

... current theories that protection against cellular stress is associated with increased lifespan. The researchers hope that their observations in C. elegans will contribute to our understanding of human aging. "Many processes involved in nematode aging may have fundamental and analogous roles in humans," Dr...

Unchecked DNA replication drives earliest steps toward cancer

...ding to conditions of DNA replication stress. This stress leads to random errors in the DNA duplication proc... year, senses the DNA breaks caused by replication stress and activates the p53 pathway. That pathway shuts down the replication process, thus limiting furthe...

New strategies to reduce hospital-aquired infections

...ogens. Health and government agencies continue to stress the need for more stringent approaches to dealing with nosocomial infections, such as the new infection control standards mandated by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO), as part of their 2005 National Patient Sa...

Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST)

...ogens. Health and government agencies continue to stress the need for more stringent approaches to dealing with nosocomial infections, such as the new infection control standards mandated by the Joint Commission on Accreditation of Healthcare Organizations (JCAHO), as part of their 2005 National Patient Sa...

To Stop Evolution: New Way Of Fighting Antibiotic Resistance Demonstrated By Scripps Scientists

...rg to the conclusion that mutation is a programmed stress response -- a survival mechanism. If the cell senses damage, and if the damage persists beyond its ability to repair it, the cell will turn on its mutation machinery and open the floodgates for evolution. Take the bacterium Escherichia coli for inst...

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