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Tag: "indirect" at biology news

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...-rich guano around the islands. Add foxes, and the indirect effects on the whole ecosystem are as dramatic as the direct effects on the seabirds. "Introduced species are a global phenomenon, and we tend to focus on the direct effects, such as the reduction or extinction of species that are consumed by an int...

New RNA polymerase discovered in plants

...looked." While Pikaard and his collaborators have indirect evidence that Pol IV is a distinct RNA polymerase, they still have many aspects of Pol IV to unravel. "We know what happens when its gone, but not how it behaves, at this point," he said. "We don't know its template, or what kind of RNA ?long or sho...

TEL2 gene cooperates with MYC gene to provoke B-cell lymphomas

...EL1, TEL2 promotes cell multiplication, playing an indirect role in the development of B lymphoma. "TEL2 doesn't directly cause cancer," Grosveld said. "Instead, this gene promotes the development of lymphoma by enlarging the B lymphocyte population. This increases the likelihood that at least a few of the c...

Computational Method Speeds Mapping of Cell Signaling Networks

...diate players in a network, this system can detect indirect influences" between molecules. Pe'er suggests a similar technique could be used to study the differences between normal and abnormal cells. This application would be particularly useful for understanding disease states where signaling malfunction pl...

Navigating an integrated yeast network

... complex webs of relationships involving direct or indirect contact. At the simplest level, some recurring patterns of interconnections occur more frequently than expected in randomized networks, and these are called 'network motifs'. Lan Zhang from Harvard Medical School, USA, and colleagues found that the c...

U. Iowa researchers improve Huntington's disease symptoms in mice

...of the current approaches aimed at treating HD are indirect and target the symptoms of the disease. RNA interference gives us the first opportunity to attack the fundamental problem and reduce protein expression from the disease gene," said Beverly L. Davidson, Ph.D., the Roy J. Carver Chair in Internal Medic...

Roundup®highly lethal to amphibians, finds University of Pittsburgh researcher

...periment to see whether the Roundup® would have an indirect effect on the frogs by killing their food source, the algae. However, he found that Roundup®, although an herbicide, actually increased the amount of algae in the pond because it killed most of the frogs. "It's like killing all the cows in a field a...

Scientists discover the body's marijuana-like compounds are crucial for stress-induced pain relief

...ieving effects as smoked marijuana, but through an indirect mechanism that could also reduce unwanted psychoactive side effects and not have the same political baggage. "There is no prescription or over the counter drug that allows us to manipulate the level of the brain's marijuana-like compounds," said And...

Micro-molecule plays big role in birth defects

...n diseases ranging from cancer to AIDS. "There is indirect evidence that if you remove two microRNAs from the human genome, leukemia develops," Harfe said. "We envision our mouse model may be a tool to directly test how microRNAs are involved in human cancers." ...

Hospitalizations because of chicken pox down dramatically since implementation of vaccine

...neumococcal and meningococcal conjugate vaccines), indirect cost savings with varicella vaccine were expected to be larger than savings in direct medical costs." "To maximize the benefits of vaccines for children and adults in the future, it is imperative to formally and openly consider how best to incorpora...

Controlling wildlife trade key to preventing health crises, study says

...rketers, and consumers experience either direct or indirect contact with each animal traded. The pathogens, and even commonly benign microbes these animals carry are sometimes transmitted to other species, including humans, in the process. Domestic animals and wild scavengers in market places and villages als...

Bone marrow stem cells may heal hearts even years after heart attacks

...enefits to patients. "Strauer et al. provide this indirect evidence of muscle regeneration using a simple technique to isolate mononuclear cells from the patient's own bone marrow, then transplanting these cells through the coronary artery feeding the damaged section of the heart muscle," Dr. El Oakley said....

Chernobyl: The true scale of the accident

...ds to be evaluated further because of the possible indirect influence of such factors as smoking, alcohol, str...on of clean food, radiation monitoring, as well as indirect losses due to removing agricultural lands and forests from use and the closing of agriculture and in...

Lethal needle blight epidemic may be related to climate change

...epresent one of a growing number of examples of an indirect effect of climate change, because increased summer precipitation would have been expected, absent D. septosporum, to benefit lodgepole pines. ...

Serious adverse reactions to smallpox vaccine appear to be limited

... of preventable serious adverse reactions provides indirect evidence of effective vaccination screening and education, as well as attentive vaccination site care and monitoring," the authors write. "This comprehensive smallpox vaccine safety monitoring and response system can serve as an effective model for ...

Scientists directly view immune cells interacting to avert autoimmunity

...ggests that regulation may occur through direct or indirect modification of the critical antigen-presenting dendritic cells ?the scavenger cells of the immune system that pick up and display self proteins that trigger the auto-aggressive T cell response, said Jeffrey Bluestone, PhD, distinguished professor o...

New possibilities to fight pests with biological means

...y the scientists in Neuchatel and Jena showed that indirect defence functions not only above ground, but also below the earth's surface [1]. To understand the biochemistry behind this plant defence, biologists of the Max Planck institute studied corn plants, caterpillars of the species Spodoptera littoralis ...

Research details how a virus hijacks cell signals to cause infection

...ergelson and Coyne found that CVBs have evolved an indirect route of attack. The virus first attaches itself to more accessible cell receptors called DAF receptors that lie exposed on the upper surface of epithelial cells. After attaching itself to a DAF receptor, the virus triggers two signals that open the...

Relationship of brain and skull more than just packaging

...pic integration of brain and skull in 3D, although indirect evidence has been accumulating for years." The researchers are also interested in understanding how the skull and brain change jointly through evolution. Vertebrate evolution shows a trend toward fewer skull and jaw bones and loss of some intercrani...

Not just the birds

...studies have not revealed the large community-wide indirect effects that are often found in aquatic trophic ca... the top down to lower levels. This study shows an indirect pathway in which a predator affects a food web. According to the researchers, the results "bolster ...

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