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Tag: "survival" at biology news

How monarch butterflies are wired for navigation

...longevity that enables the butterfly to extend its survival in its overwintering grounds in Mexico. The researchers include Ivo Sauman of the Czech Academy of Sciences; Adriana D. Briscoe of the University of California, Irvine; Haisun Zhu, Dingding Shi, Quan Yuan, Amy Casselman, and Steven M. Reppert of the...

Decisions, decisions: Male or female?

...tor transcription.") "Though we all know that the survival of the species depends on producing children, up until now we haven't understood how germ cells in the developing embryos decide whether to eventually become the sperm or eggs needed later for adult reproduction," said Mark Van Doren, assistant profe...

Anthrax inhibitors identified by Burnham team

...combination with the antibiotic Ciprofloxacin. The survival rate for mice treated with each of the compounds tested in the combination therapy was two-fold over mice treated with Ciprofloxacin alone. "This represents a significant advance in developing a possible emergency treatment for anthrax," said Dr. Pe...

Unexpected lock and key mechanism found for the assembly of tumor blood vessels

... integrin meets with VCAM, both cell types receive survival signals at this active stage of blood vessel development, which occurs mainly in tumors in adults," said Varner. "This was a chance discovery, which was exciting, and we think it may have important clinical significance." In their current studies of...

New complete muscle grown in the lab

...wn blood supply boosted the new tissue's chance of survival and of connecting seamlessly with the mice's own blood vessel networks, they concluded. The study was supported by the United States' National Institutes of Health. The Technion-Israel Institute of Technology is Israel's leading science and technol...

Researchers feed tiny pills of RNA to planarians to identify genes essential for regeneration

...ified by the U researchers may be required for the survival of the parasites. "Considering such pathogens are estimated to cause disease in nearly 300 million people throughout the world, these genes might make attractive drug targets," Sánchez Alvarado and his fellow researchers wrote in the study. The pla...

USC researchers determine mechanism of action of chemotherapy drug

...hioredoxin reductase is key to the replication and survival of cells, and its inhibition ultimately leads to c...via disruption of critical enzymes needed for cell survival and replication. "We have increased the understanding of this drug's mechanism of action," Hacia sa...

VCU study shows hormone-like molecule kills cells that cause inflammation in allergic disease

...th in developing mast cells, it did not affect the survival of mast cells that had already undergone differentiation. "We believe that cytokines, such as interferon gamma, are an important means of controlling mast cell function in the body," said John J. Ryan, Ph.D., associate professor of biology at VCU a...

Climate model links higher temperatures to prehistoric extinction

...th in developing mast cells, it did not affect the survival of mast cells that had already undergone differentiation. "We believe that cytokines, such as interferon gamma, are an important means of controlling mast cell function in the body," said John J. Ryan, Ph.D., associate professor of biology at VCU a...

Most common lung cancers may begin in newly discovered cells

...isease has spread to other organs have a five-year survival rate of only two percent. In contrast, lung cancer detected at an early stage boasts a 50 percent survival rate over a five-year period. "There are many similarities between stem cells and cancer," said fir...

Biased reporting found in cancer prognostic studies

...ated the association between TP53 and mortality or survival rates. They collected three levels of information about the studies. The first level included studies that were indexed in the scientific databases MEDLINE and EMBASE using the key words "mortality" or "survival." The other two levels of collected in...

Study casts doubt on 'Snowball Earth' theory

...th's oceans were covered by thick ice, explain the survival of life by hypothesizing the existence of small warm spots, or refugia. On the other side are supporters of a "Slushball Earth" that would have included large areas of thin ice or open ocean, particularly around the equator. The debate has tended t...

Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses

...f RML expertise--and because it possesses the same survival mechanisms as the more serious tick-borne encephal...nd many scientists thought they would use the same survival mechanism and respond to the same vaccines and therapies, but the RML work shows otherwise. "NS5 pr...

Compound from Chinese medicine shows promise in head and neck cancer

...elieve novel agents that target Bcl-xL can improve survival for our patients," Carey says. In a previous study published in November 2004 in Clinical Cancer Research, Bradford, Carey and their team treated cell cultures of head and neck squamous cell carcinoma with the (-)-gossypol compound and found it inhi...

Secrets to antibody's success against West Nile Virus surprise scientists

... found injection of the new antibodies could boost survival rates of mice infected with the virus to greater than 90 percent. Scientists at Macrogenics are working on the preliminary studies required before the West Nile antibody can be tested in humans. Meanwhile, researchers at Washington University want...

Expanding forests darken the outlook for butterflies, study shows

...rable to a variety of mortality factors that lower survival rates," Roland explained. "This has been demonstrated for other species of butterflies." Only a few species of butterflies are threatened in the Canadian Rockies, but many more are threatened in Europe, where the problem of shrinking alpine meadows ...

Survival of heart patients on beta-blockers varies greatly with genetic variation

... genes, physicians may modify treatment to improve survival in these patients, according to McLeod. "These da...this study, the researchers found no difference in survival associated with variations of the beta-1 gene. But variations in the beta-2 gene significantly deter...

Drug resistance testing in treatment-naive HIV patients is cost-effective

...Quality-adjusted measurements of time reflect that survival with an illness is presumed to be of lower quality than healthy survival.) "For the approximately 90 percent of patients with no resistance, the testing provides no benefit," said lead author Paul Sax, MD, of Brigham and Women's Hospital. "However,...

Mayan stingless bee keeping: Going, going, gone?

...ke to see it turned around, not only to ensure the survival of meliponiculture as a way of life, but also to build up breeding stock to be re-introduced into the wild where bees play an important role as pollinators," Roubik explains. But beekeeping is fast becoming a global monoculture. Africanized honey be...

Engineered skin offers clues to melanoma development

...But no treatment can substantially enhance patient survival once metastasis has occurred." To simulate the environment in which melanoma naturally arises, the research team introduced one or more cancer-associated genes into human melanocytes, the pigment-producing cells that normally reside in the deepest l...

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