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Tag: "degradation" at biology news

Malaria parasites develop in lymph nodes

...the parasites in the lymph nodes, however, escaped degradation and began to develop into forms usually found only in the liver. Up to now, researchers believed that, although both blood and lymphatic vessels take up Plasmodium parasites, they all end up in the liver, Mnard said. "Nobody had proposed that they ac...

New pathway could present an intervention point for cancer treatment

... O'Malley. "This is an important pathway for SRC3 degradation that has never been described," said O'Malley. Other modes of taking proteins to the proteasome for destruction involve adding a molecule called ubiquitin and using energy. "This molecule does not require ubiquitin or an energy source," he said. "It...

2006 Ocean Sciences Meeting: Press Conference Schedule

... higher than at any time since 1945 and is causing degradation of coral reefs. Since the 1980s some researchers have hypothesized, but not proven, that nutrient pollution levels, rather than temperature, may in some cases determine the latitudinal bounds of coral reefs. New results from an extensive survey of re...

JCI table of contents, February 9, 2006

...t inflammatory cells. The studies suggest that the degradation products of protease activity, in addition to the proteases themselves, may be promising targets for emphysema therapy. TITLE : Elastin fragments drive disease progression in a murine model of emphysema AUTHOR CONTACT: A. McGarry Houghton Brigham a...

News tips from the Journal of Neuroscience

... and thus sent to proteasomes for degradation. Ret degradation effectively terminated the GDNF-mediated signal. When the authors disrupted lipid rafts, GDNF-mediated neuronal survival was severely diminished, an effect that was reversed by inhibition of proteasomal degradation. Thus, lipid rafts serve to sequest...

New tools developed for studying neurodegenerative brain disorders

...ut the process of axon collapse. For example, the degradation rate is faster when the lipids comprising the memb...found that these vitamins delayed or prevented the degradation of the cytoskeleton. "These antioxidant vitamins neutralized the free radicals before they had a ch...

Study describes how cells return to normal after responding to stress

...n. Once all the proteins that have been tagged for degradation have been removed by the proteasome, a barrel-shaped complex of proteins that digests other proteins, CHIP begins to tag the heat shock proteins themselves for degradation. Once they are all removed, the cell can go back to business as usual. Patter...

Moderate lifetime reductions in LDL cholesterol dramatically reduce risk of heart disease

...of PCSK9 produced by cells, which in turn leads to degradation of the LDL receptor. This molecule is responsible for clearing the majority of LDL cholesterol from the blood, so its loss attenuates statins' cholesterol-lowering effects. Because results of the Dallas Heart Study show that people with a low level o...

The Amazon in 2050: Implementing the law could save a million square kilometers of rainforest

... elimination of several forest formations, and the degradation of several major watersheds. According to Britaldo Soares-Filho, the paper's lead author, "For the first time, we can examine how individual policies ranging from the paving of highways to the requirement for forest reserves on private properties w...

MTBE contamination: A microbial approach for groundwater

...12 and carbon-13) brought about from the selective degradation of the carbon-12 form in the case of MTBE. "So when the ratio of carbon-12 to carbon-13 decreases, it indicates the presence of the kind of bacteria we are looking for," Hggblom said. "This approach also will help us eventually home in on precisely w...

Einstein researchers find potential new drugs for tuberculosis

...tty acid and mycolic acid synthesis and fatty acid degradation - are essential for bacterial survival, and this combined inhibition had a powerful effect against the microbes. To our knowledge, this is the first example of an antibacterial compound that inhibits several pathways to achieve its effect." The Einst...

Embryos tell story of Earth's earliest animals

...nder normal seawater conditions. If the cell's own degradation processes don't destroy it, nearby bacteria will. ...Such reducing substances slow or stop the internal degradation processes that occur very soon after cells die and also inhibit voracious bacteria. Hydrogen sulfid...

Biodiversity conservation may help reduce the impacts of natural disasters UNU

...ecision-making processes may reverse the trends of degradation in ecosystem services." The MA shows that short-term economic and other benefits derived from exploiting forests, wetlands, oceans, and other resources are significantly overweighed by the greater long-term damage to human livelihoods and health. It...

Value of services performed by insects tops $57 billion in US

...but our biological infrastructure is vulnerable to degradation too," said Losey, an applied insect ecologist. "If we do not take care of it, it will break down and could seriously impact the economy." "In fact in many places - crop pollination, for example - the cracks in the infrastructure are already showing,"...

Oxidation defense in mosquitoes benefits malaria parasite

...characterization of enzymes involved in tryptophan degradation in mosquitoes, which results in the synthesis of XA. "Deciphering the molecular architecture of each enzyme in this pathway will be used for the structure-based rational design of potent and highly selective inhibitors of potential interest as innova...

Fish oil may help protect against retinal degenerative diseases

...y conduct the daily shedding, internalization, and degradation of the tips of the photoreceptor outer segments. It now appears that RPE cells are also key to the survival of photoreceptor cells. Both photoreceptor and RPE cell types are normally exposed to potentially damaging factors such as sunlight and high ...

Towards a unified model of transcription termination

...d Xrn1 do degrade the nascent RNA transcript, this degradation is not sufficient to cause polymerase termination. Rather, Rat1 helps recruit cleavage and polyadenylation factors that are necessary for termination. "As is often the case with competing hypotheses like the torpedo and allosteric models for transcri...

Monkey-dung study offers clues about land-use, wildlife ecology

...and biological attributes. They concluded that the degradation of the forest and human presence, as measured in stump density, strongly influenced the prevalence of parasitic nematodes. Infection risk, they reported also was higher in the fragment with the highest stump density than in the fragment with the lowe...

Cancerous vs. healthy cells: Researchers identify the road to success

...DNA in the nucleus. Bortezomib not only stops the degradation of IkB-alpha, it also suppresses the activation of NF-kB, thus stopping cell growth. "By interfering with the function of IkB-alpha proteins, bortezomib was shown to induce glioma celldegradation and enhance anti-cancer effects of SERMs," said Ai-Mi...

March of Dimes awards $250,000 prize to research pioneer

... the regulation of cells through selective protein degradation rivals, and often surpasses in significance, the previously known regulation of cells by genes. Today, the study of ubiquitin has implications for research into the causes of birth defects, neurodegenerative syndromes, cancer, and immune disorders. ...

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(Date:12/1/2008)...OLUMBIA, Mo. In the race for bioengineered crops,...st leg in a multi-leg relay. Once the sequence is ...rs to identify genes, functions. A draft sequence ...mplete genome will be available soon. Taking the n...terdisciplinary Plant Group researchers have demon...
(Date:12/1/2008)...cientists at St. Jude Children,s Research Hospital...l type is so ready to change its identity that it ...Prox1 to dissuade it. , The researchers showed ...ty is sufficient to reprogram a specialized type o... In the absence of active Prox1, the LEC actually ...
(Date:12/1/2008)...rostate cancer and perhaps other cancers promote... that carry their messages, a finding associated w...Baylor College of Medicine in the first report of ...Clinical Cancer Research . , Previous research s...erves, but this is the first time that scientists ...
(Date:11/30/2008)...he December 2008 issue of BioScience includes a ...ocrine Disruptors in the Environment, coordinated ...lorida. The complete list of research articles in...ges of Aquatic Vertebrate Ecotoxicology. , Michae... Rise. , As a model organism for ecotoxicology, t...
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