Tag: "stressful" at biology news
Good news: As you age, leg blood vessels adapt so you can still exercise without fainting
...responses. It increases our ability to respond to stressful
situations. One way to look at exercise physiolog...cally -- is as a non-life-threatening example of a stressful
situation. Think about it: When we exercise, our heart and breathing rates rise rapidly and blood v...
A new culprit in depression?
...ession on the brain or by external factors such as stressful
events. Other studies have shown that genes involv...promised FGF systems, but if they don't experience stressful
life events they may never develop major depression. We need to study this system further to unravel...
UCSB researchers advance understanding of urinary tract infections
..., then they wash out of the urinary tract. Certain stressful
conditions can influence the genetic "switch" that...s a mechanism by which a sensor called Cpx detects stressful
environmental conditions and sends a signal to turn the switch off. This response may be important i...
Promising results in the battle against incurable ALS muscle disease
... diminishes. VEGF also helps neurons survive under stressful
conditions. Last year, the work of Peter Carmeliet's team showed that persons who produce too little VEGF - due to certain variations in the gene that codes for VEGF - have a greater chance of developing ALS. Earlier this year, their research proved ...
Science to restore the nation's ecosystems
...in stem Klamath River. These high temperatures are stressful
for cold-water salmon, and place the Klamath on an...n in the Klamath Basin. The season of temperatures stressful
to salmon has lengthened by about one month over the period studied and the average length of main s...
JCI table of contents
... ACCOMPANYING COMMENTARY: TITLE: Birth pangs: the stressful
origins of lymphocytes AUTHOR CONTACT: Shiv Pillai Harvard University, Boston, Massachusetts, USA. Phone: 617-726-5619; Fax: 617-724-9648; E-mail: firstname.lastname@example.org This article is available at http://www.jci.org/cgi/content/full/115/2...
Rat brain's executive hub quells alarm center if stress is controllable
...roscience, February 6, 2005. Lack of control over stressful
life experiences has been implicated in mood and anxiety disorders. Rats exposed to uncontrollable stress develop learned helplessness, a syndrome similar to depression and post traumatic stress disorder (PTSD). They lose the ability to learn how to ...
Childhood deficits in the cerebellum may be linked to adult alcoholism
...ible that allowing children to live in poverty, or stressful
and/or abusive environments could be contributing in a physical way to their vulnerability to becoming alcoholics. These kinds of negative life circumstances have always been identified with addictive disorders for their psychological effects, s...
A regulatory network analysis of phenotypic plasticity in yeast
...oughly 6000 genes found in yeast across a range of stressful
environments. Some genes varied enormously in their expression levels from one environment to the next, while others were relatively constant. That is, some genes were more plastic than others. Promislow has now discovered that the more regulators a ...
Short-term social stress may benefit immune response to infection
...ours was definitely disruptive and upsetting. This stressful
episode was repeated on six consecutive days, after which both stressed and non-stressed mice were given a low-dose influenza infection. All mice quickly recovered from the mild infection and within four weeks had developed stable immunological me...
Unconventional brain circuits offer clues to insomnia-obesity connection
...or survival," he said. "But in today's chronically stressful
environment, the circuitry may also be an underlying cause of insomnia and associated metabolic disturbances, including obesity."...
Low oxygen likely made 'Great Dying' worse, greatly delayed recovery
...en and warming temperatures would have been doubly stressful
for late Permian animals," Huey said. "As the climate warms, body temperatures and metabolic rates go up. That means oxygen demand is going up, so animals would face an increased oxygen demand and a reduced supply. It would be like forcing athletes t...
A little stress gives beneficial oomph! to immune system
...nding or infection or until the brain identifies a stressful
situation. When that happens, the brain releases hormones that set troops of these immune cells into motion. The cells travel to potential battle stations primarily the skin along with the lymph nodes that drain the skin. "Most immune challenges or ...
PNAS highlights for the week of April 25-29
...y that enables plants to persist during periods of stressful
environmental conditions. Dormancy is induced by the short days and cold temperatures of winter. Isabel Allona and colleagues investigated the role of the chestnut's circadian clock genes in regulating this period of dormancy. The researchers grew ch...
Costly breeding programs for endangered species pay off
...one extinction for the MAI lines. "Apparently, the stressful
environment served to select only the most fit lines while the more benign environment allowed low-fitness lines to persist in captivity," said Meffert. Though the findings clearly support the case for expensive MAI breeding schemes for some endanger...
Evolution of morphological integration
... accommodation not only allow shrews growing under stressful
environments to maintain locally adaptive foraging morphology, but also provide a mechanism for stress-induced evolutionary change....
New protein vital for immune response is found in surprise location
... a sentinel to detect invading pathogens and other stressful
signals, ensuring that the host cells survive and thrive even in adverse environments. Dr. Chen and his research group are currently working to determine how the MAVS protein functions within the complex series of biochemical reactions that takes pla...
Cancer drug target Chk1 may also be source of drug resistance
...k1 protein responds with cell-survival activity to stressful
conditions induced by hypoxia and certain anticanc...avily on Chk1 for survival and proliferation under stressful
environmental conditions. Instead of halting abnormal growth of cancer cells, drug therapy could in...
Penguin chicks exposed to human visitors experience spike in stress hormone
...ticosterone to build up in the bloodstream after a stressful
event, such as being captured. Additional blood sa...s that happen to adults can only be traced back to stressful
situations or elevated corticosterone levels when they were young."...
Hope for arthritis, heart attack, stroke relief found in unique 'acid active' receptor
...ular receptors to enhance selected responses under stressful
conditions. "Ultimately, manipulation of these receptors may enhance cell survival and recovery through activation of protective mechanisms," Westlund said. "Further study of this receptor family may contribute to tissue preservation and improved re...
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