Tag: "stops" at biology news

Cardiac arrest may hinder ability to learn certain tasks

...xygen during a severe attack one where the victim stops breathing can either kill or seriously damage neurons, the primary cells of the nervous system. The neurons that do survive a heart attack may undergo major structural changes that can affect learning, memory and other behaviors, said Courtney DeVri...

Punching the timeclock of life

...until it starts to breaks down and eventually just stops working.In research published in the Sept. 27 edition of the Journal of Cell Biology, Longo proposes that aging is programmed so that the majority of a population dies prematurely to provide nutrients for the sake of a few individuals who have acquir...

Gene changes linked to increased eye pressure may have implications for glaucoma therapy

...ssure, Borrs said. Often in glaucoma, the TM stops working and fluid builds up within the eye, causing pressure inside the eye to rise. When this happens, the optic nerve in the back of the eye can become squeezed. As this is the area that carries the visual signals from eye to brain, vision loss can...

LBP-1a gene mutation linked to disruption of normal fetal development

...abortion refers to a pregnancy in which the embryo stops developing normally, and which usually ends in spontaneous abortion. "Lack of normal blood vessel formation in the yolk sac and placenta in humans could also cause intra-uterine growth retardation (IUGR)," said Vishwas Parekh, M.D., a postdoctoral f...

Protein vaccine fully protects mice from lethal aerosol challenge with ricin toxin

...er the cell. Once inside the cell, RTA effectively stops new protein synthesis and causes cell death. Previous attempts to develop a ricin vaccine suggested that isolated RTA could induce protective immunity against the toxin in animals. However, using RTA as a vaccine component was problematic because...

Researchers in UGA Vet School discover a mechanism that blocks replication of a retrovirus

...of sheep, the researchers found that the mechanism stops cancer-causing retroviruses from exiting host cells and spreading. Their findings shed new light on how retroviruses evolved and will help explain late steps in the retroviral life cycle. The findings were published today in the Proceedings of the ...

New drug shows promise against Gleevec resistance in mice

...rstanding why Gleevec works for some patients, but stops working for others. In September 2000, HHMI investigator John Kuriyan , a structural biologist then at The Rockefeller University, who had studied the regulation of Abl kinases for many years, made the seminal discovery that Gleevec, or STI...

New space-borne instrument to track greenhouse gases, ozone destroyers, and other pollutants

... but scientists now know warm, rising air normally stops at the frigid, dry tropopause. Why is the stratosphere, historically dry, now getting wetter? The answer could shed light on how a changing climate is modifying the atmosphere and how those modifications could in turn feed back into our climate and ...

Finding the hole in the defenses of cavity-creating microbes

...to go to identifying and isolating a compound that stops the process in bacteria," says Quivey. "I'm cautiously optimistic." The research, which was funded by the National Institute for Dental and Craniofacial Research, earned a prize for Fozo at the spring meeting of the International Association for Den...

Protein believed to control formation of memory identified by Scripps & UCSD scientists

...drugs known as protein synthesis inhibitors, which stops the production of proteins in the animals' brains, these animals lose their long-term memory. This observation has led scientists to predict that the formation of long-term memory requires new protein synthesis. This prediction has since been borne ...

UCLA researchers recreate patterns formed by mammalian cells

...ells together (activator) and another protein that stops them from coming together (inhibitor). The inhibitor protein must diffuse or disperse more rapidly than the activator. The result creates areas where cells pile up separated by empty spaces. The exact patterns depend on the strength and speed of t...

Researchers establish first molecular link between eating and aging

...(WAT). When it reduces its caloric intake, the WAT stops storing fat and begins releasing it for metabolism. The paper's authors learned that fat is released from or metabolized by the body, rather than stored, when the Sirt1 protein senses short-term famine and turns off the receptors that normally keep...

Floods, bugs and Hollywood disasters

...er. "What that does is it buys you time — it stops the water absorption. Frost-free pulls moisture out of the content, so it will dry it and stop the mold growth. You want to save it, but you need to treat it and make sure it's safe. The best thing to do is buy yourself time to make the right decisi...

Molecular image of genotoxin reveals how bacteria damage human DNA

...bacteria might induce cell cycle arrest because it stops cells from being sloughed off in areas such as the intestines where bacteria seek to make a home. "CDT may also act as an immunosuppressant," says Stebbins, "since the immune system requires cell division to respond to microbial infection." There ar...

Cell division can be halted in multiple ways, with implications for cancer

...s get shorter. As telomeres dwindle, cell division stops altogether. Senescent cells do not function the way young cells do, and are believed to be associated with skin wrinkles, immune system problems and age-related diseases, including cancer. A protein called p21 acts as the molecular switch that trigge...

Artificial light-dark cycles expose circadian clocks at odds with each other

...ke several days of the new routine before the body stops exerting a strong urge to sleep, de la Iglesia said. "Many of the people employed on shift work are internally desynchronized. They have a rest-activity cycle that is out of synch with the rest of their cycle, and some can't cope with this," he said...

Two molecules work together to aid transport of immune cells, UT Southwestern researchers find

...ior author of the study. A second receptor, VLA-4, stops the T-cells from rolling. This step in the process is called firm adhesion. "You need both of these steps in order to get the T-cells out of the blood vessel and into tissue," Dr. Siegelman said. "Only by completing the second step, firm adhesion, ha...

Soy consumption could help prevent prostate cancer and male pattern baldness

...aldness. In fact, the molecule, equol, completely stops in its tracks the male hormone dihydrotestosterone (DHT), which normally stimulates prostate growth and causes male pattern baldness. "This molecule is remarkable," says Kenneth Setchell, PhD, director of Clinical Mass Spectrometry at Cincinnati Chil...

Passwords to guard entry aren't enough to protect complex data

...he filter is at the level of user access, security stops once a user gains access to material authorized for his or her role. If a good guy turns bad - as in the case where a disgruntled employee with access privileges decides to do some damage - the database becomes endangered. A severe disadvantage to th...

Patients give nod to kidney dialysis at home

... cleans wastes from the blood stream. If the organ stops working, to survive, patients must undergo "kidney replacement treatment" with either a scarce kidney transplant or more commonly a lifetime of dialysis. Peritoneal dialysis involves surgically and permanently placing a soft plastic tube or catheter...

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