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Tag: "problem" at biology news

Five surprising facts about starvation that could change the international agenda

...o make a lasting impact on human well- being. "The problem of wasting needs to be addressed wherever it is identified, not just in emergencies," says Webb. "Wasting in emergencies represents the tip of the iceberg," write the authors. "Ironically, the international community has become much more adept at sa...

Selenium-protein deficiency raises prostate cancer risk

...rs -- notably lung, colorectal and prostate. "The problem is, nobody seems to know how the mechanism works, and that's not trivial," said Alan Diamond, professor of human nutrition at the University of Illinois at Chicago and principal investigator in an ongoing multidisciplinary study set up at UIC to help...

Computational model simulates AZT metabolism in mitochondria

...f multiple effects is needed. That is the kind of problem that needs a systems biology approach." When AZT reaches a cell, it is subject to some of the same metabolic modifications or phosphorylation events that are encountered by the four naturally occurring deoxynucleosides, the building blocks used to...

With few factors, adult cells take on character of embryonic stem cells

...regarding the use of human embryos, as well as the problem of tissue rejection following transplantation into patients." Those problems could be circumvented if pluripotent cells could be obtained directly from the patients' own cells. "We have demonstrated that pluripotent stem cells can be directly ge...

Parkinson's disease mechanism discovered

...nction or how it contributed to disease. One major problem facing researchers, Lindquist said, was that alpha-synuclein accumulation causes a range of abnormalities, and it was not possible to sort out which were causes and which were effects in Parkinson's disease pathology. However, Lindquist's team devel...

Bt cotton in China fails to reap profit after seven years

...s. Researchers do not yet know if a secondary pest problem will emerge in the United States and other countries, Pinstrup-Andersen said. The problem in China is not due to the bollworm developing resistance to Bt cotton - as some researchers have fe...

How plants avoid feeling the burn

... than the width of a human hair. One measurement problem is that carotenoids are highly prone to react with water and oxygen, so all measurements had to be performed in an environment that would both protect the molecule and immerse it in an environment mimicking a biological cell membrane, where the carot...

Chewing up a key regulator of fat synthesis keeps mice lean despite a high-fat diet

... are protected from fatty liver disease, a serious problem in obese individuals with insulin resistance," says Montminy. Our body's ability to store fat requires the activity of the enzyme acetyl-coenzyme A carboxylase, or ACC. When we fast, the body starts to burn fat while simultaneously shutting down ACC...

Researchers add crucial information on how the body's T cells react to parasitic diseases

...ave it, it must steal it from the host cells." The problem is that T. cruzi potentially expresses more than a thousand ts genes, and this pool varies from parasite to parasite--making this set of proteins a poor choice for vaccine development, Tarleton said. The importance of the new research, however, is...

Technique speeds up detecting, treating wound bacteria

...taken his passion for research and applied it to a problem that affects civilians as well as injured service members: wound bacteria. "The flora of wound infections is very complex," he said. "At times there can be 12 or more organisms present, and most clinical laboratories are not proficient in isolating...

Chocolate, wine, spicy foods may be OK for heartburn, Stanford study finds

...ly eliminating a certain food doesn't fix the main problem of the esophageal sphincter relaxing too readily. Gerson's experiences with her patients back that up. "It's very rare to see a patient who says, 'Oh, I just changed my diet and everything got better,'" she said, "though this might be the case for ...

Scientist-astronaut sends T-cells into space

... acquired immunodeficiency syndrome (AIDS). The problem of immunosuppression in microgravity was first noted during the Apollo moon mission series in the 1960s and 1970s, when 15 out of 29 Apollo astronauts developed infections during their missions or soon after landing. Subsequent experiments aboard Sky...

Pigeons provide clue to solving common problem in heart patients

... growth of these cells could potentially solve the problem of vessels re-closing after angioplasty." The wo...ing has potential for helping scientists solve the problem of restenosis. "Interfering with these factors and the signaling pathways involving STAT4 may be ...

Trial success for diabetic nerve therapy

... digestive tract. "Diabetic neuropathy is a major problem in insulin-dependent diabetes, particularly in patients who have had the disease for a period of time," said Professor Tomlinson, who is based in the University's Faculty of Life Sciences. "Our approach to gene therapy is quite different to previous...

Anti-inflammatory drug's potentially deadly side effect found to be rare

...ly doesn't bother us," he says. "It only becomes a problem in those with suppressed immune systems, where it can enter the brain and cause PML. That includes AIDS patients, organ transplant patients and patients with blood-related malignancies such as leukemia. And even in those patients it's still rare--we'...

UCR researchers design chip that can improve citrus varieties

...three-year research project. "For a trait posing a problem for the consumer, such as an undesirable flavor, we can identify genes associated with the trait and target these for correction to improve the flavor. The chip also helps us address citrus diseases by helping us see what happens in cells when a citr...

Computer scientist sorts out confusable drug names

...at have already been approved. PPC looked at the problem and then, based on a tip from a professor at the U...sted in following the FDA's lead in addressing the problem of confusing drug names. A number of linguists and computer scientists are also now using Kondrak'...

US woman gives birth to baby from world's first frozen donor egg bank

... many reasons for infertility, but the most common problem for women over age 35 is that their eggs do not perform well enough to achieve pregnancy. The first frozen egg bank will offer women the opportunity to better manage their own infertility, which is often a daunting and difficult path. Many probl...

Stem cell transplants improve recovery in animal models for stroke, cerebral palsy

...stroke," said Dr. Hess. "It's a huge public health problem in the world." He hopes one day stem cell therapy,... form tumors or other abnormal tissue, a potential problem seen with embryonic stem cells. Furthermore, MultiStem TM cells generally do not require the close...

Ancient ants arose 140-168 million years ago

...ed States each year. This pathogen is a particular problem aboard cruise ships. The researchers believe that their mass spectrometric method could potentially be used for biodefense and public health preparedness as a tool for rapidly detecting norovirus--a category B bioterrorism agent--and other viral publ...

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