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Tag: "interaction" at biology news

Stanford discovery may help predict when toxoplasma can be deadly

...ersions of Toxoplasma strains evolved for optimal interaction with different hosts," said Boothroyd, noting that the wrong pairing of parasite and host can have dire consequences. "If a given strain gets into the 'wrong' host, the result is a system out of kilter and extreme disease. It's the bull in the ch...

High HPV concentrations combined with smoking significantly raise risks of cervical cancer

...e found a statistically significant multiplicative interaction between the duration of smoking and HPV presence c...l cancer," Gunnell said. "One explanation for this interaction could involve the influence of smoking on persistence of HPV infection, probably due to localized im...

Scientists get best look ever at water-life connection

..." he said. "And a physicist will tell you that the interaction would happen much faster -- on the picosecond [one...hylococcus. The key to getting a good view of the interaction was to precisely locate an optical probe on the protein surface. They inserted a molecule of the ami...

UCLA researchers unravel a mystery about DNA

...hannel at predictable sites that are available for interaction with transcription regulatory proteins. Beyond resolving the mechanism for initiation, the significance of this work is in pointing out an important regulation "checkpoint." Scrunched DNA is likely to play a major role in future studies of transcript...

Edge density key to controlling gypsy moth spread

...4. They used a theoretical model to show how an interaction between negative population growth at low densities ?"the Allee effect" ?and the existence of a few satellite seed colonies created by human transfer of the insects over long distances, explain the invasion pulses, the researchers explain today (Nov....

Particle size matters to bacteria ability to immobilize heavy metals

... reacts with metal oxides and how the rate of this interaction is influenced by size" Bose said. So far, the research shows that particles of similar shape but different size down to 10 nm show a 10-fold difference in bioreduction rates. Smaller nanoparticles show a lower rate of reduction than larger nanopart...

What's next for gene therapy? Plastic

...rtant because it can influence the strength of the interaction with DNA and permit efficient release of the DNA for protein synthesis." Layman will deliver the talk, "Influence of macromolecular architecture on nucleic acid transfection (POLY 611)," at 4 p.m., Wednesday, Sept. 13, in the Marriott Salon 14/15 a...

Most important actors in the growth process of neurons identified

...hers have found that axon growth is mediated by an interaction among three signal cascades: Wnt, FGF and JNK. JNK is necessary for stimulating the growth of axons. Wnt activates JNK and FGF inactivates JNK, so the right balance between Wnt and FGF provides for a precise regulation of the growth of neurons. Axona...

Nanoparticle assembly enters the fast lane

...echnology, we have to understand the complexity of interaction in such hybrid systems." The synthetic DNA used in the laboratory is capped onto individual gold nanoparticles and customized to recognize and bind to complementary DNA located on other particles. This process forms clusters, or aggregates, of gol...

Study illuminates how the plague bacteria causes disease

... Mutations that prevented the bacterial proteins' interaction with the host protein significantly impaired YpkA's ability to disrupt the cytoskeleton. Moreover, a mutant strain of Y. pseudotuberculosis that lacked the GDI activity caused significantly fewer problems for infected mice compared to normal bacteria...

Malaria treatment efficacy compromised in certain HIV-positive patients

...eas where both diseases coexist. Furthermore, the interaction between antimalarial and antiretroviral therapies should continue to be examined in an effort to maximize the effects of therapy on both diseases and to decrease the malaria burden in HIV-infected individuals. ...

Gene-bender proteins may sway to DNA

...y at Yale University, who examined the protein-DNA interaction with the more traditional stopped-flow technique. "While stopped-flow technique can capture dynamics of biomolecules occurring on millisecond time-scales or longer, the goal of this study was to extend the time-resolution down to sub-microseconds. ...

Cocaine high caused by interference in neuronal receiving stations

... event. Wang and his colleagues found that this interaction between D2R and NR2B occurred specifically in the ...ects. The researchers also analyzed whether this interaction between D2R and NR2B affected the rats' behavioral response to cocaine—specifically the hyperactivit...

Proteins necessary for brain development found to be critical for long-term memory

...However, when Carew and his colleagues blocked the interaction between the BDNF-like growth factors and the TrkB receptors, they found that serotonin alone was not enough to retain the long-term memory of the shock. While short-term memory was retained, 24 hours later the snails -- which normally would remember ...

Fishy cooperation

...ly spectacular about this study is that the entire interaction pattern—two actors who seemingly know what they are going to do and how this will benefit them—is not one we usually associate with fish. This is probably because we tend to develop cognitively demanding accounts for our own behavior and believe that...

Discovery of the first resistance gene to rice yellow mottle virus

... the gene in a patch on the surface favourable for interaction with the virus. In these varieties, the mutation d... primary biological functions, but can prevent its interaction with the virus which is then blocked in one of the stages of its infectious cycle. In parallel, a...

Tearing down the fungal cell wall

...trategies aimed at understanding the host-pathogen interaction for this destructive plant pathogen." The investigators used a wide range of experimental approaches to look in detail at the link between the function of the gene and its impact on the structure of the spore cell wall. A recently developed gene di...

Theory of oscillations may explain biological mysteries

...important effects such as “synchronized chaos? the interaction between two weakly competing consumers of a food resource can be transformed by the arrival of a third competitor to provide unpredictable opportunities for the newcomer to invade. Vandermeer holds out hopes that the study of oscillations in biologic...

Growth factor stimulates rapid extension of key motor neurons in brain

...een only during initial development. Blocking the interaction between IGF-1 and its receptor reduced axon growth to control levels, confirming that the IGF-1 pathway is critical to the enhancement effect. Experiments with another type of neuron and with several different growth factors verified that axonal...

Interaction between lymph and liver cells may affect immune response

...liver cells and T cells could interact or that the interaction could take place across gaps between LSECs. The... first demonstration by electron microscopy of the interaction between naïve T cells and liver cells in a living organism, which shows that the liver is an excepti...

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