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Tag: "raise" at biology news

Older female fish prefer imperfect male mates, study finds

...r in next month's print edition. Morris' findings raise the question of whether there may be a change in mating preference over time in other species as well. In a current study on human attraction, for example, the average age of the females and males tested for preference for symmetrical faces was only ...

Emerging staph strains found to be increasingly deadly and deceptive

...nt reports of 'community-acquired' MRSA infections raise concern ?If MRSA becomes the most common form of Staphylococcus aureus in a community, it will make treatment of common infections much more difficult." The April 7, 2005, issue of The New England Journal of Medicine refers in an editorial to "?an ep...

Studies clarify risk factors for mother-to-child transmission of hepatitis C virus

Breastfeeding does not raise the risk of mother-to-child transmission of hepatitis C virus (HCV), according to two new studies published in the December 1 issue of The Journal of Infectious Diseases, now available online. One study found that infant girls are twice as likely t...

Researchers discover new tumor defense system

...m the Torrey Pines Institute for Molecular Studies raise the possibilities of new therapeutic targets for cancer, such as those that may transport free fatty acids out of the tumor. Alternatively, free fatty acid levels in the blood could be used to help gauge the aggressive potential of a tumor. ...

DNA from feathers tells tale of eagle fidelity

...ng birds, the vast majority of which mate with and raise offspring from multiple partners. Not only is this study the first to confirm monogamy in eagles, more importantly, it also is the first to rely on feathers collected "noninvasively," or without trapping and handling, to provide a source of DNA to d...

Researchers develop gene therapy to reverse pulmonary arterial hypertension

...r Serge Adnot, the journal stated: "These findings raise important issues regarding the role of survivin in the pathogenesis of PAH, its value as a prognostic indicator, and its use as a target for new therapeutic strategies." Other authors include: Sean McMurtry, Pulmonary Hypertension Program; Stephen A...

Change in gene may be underlying molecular defect in some colorectal cancers

...he field effect or field cancerization). They also raise several questions about how these findings may affect related areas of research, such as approaches to chemoprevention and "whether the reversal of DNA methylation in precancerous cells may prevent the development of new primary cancers in the same o...

The very defensive caterpillar

...rotect against a repeated challenge. These results raise important issues in insect research which will be ... be naïve to such control agents but these results raise the possibility that control with one pathogen may confer resistance to another. Most experiments on...

Menopause Symptoms May Come Back After Stopping Menopausal Hormone Therapy

...some herbs can have estrogen-like actions and thus raise concern about their long-term use," said Barbour Warren, a research associate with BCERF and the co-author of the fact sheet "Herbal Medicines and Breast Cancer Risk," which is available free on BCERF's Web site at http://envirocancer.cornell.edu/ . ...

Women cautioned against using herbal supplements

...some herbs can have estrogen-like actions and thus raise concern about their long-term use," said Barbour Warren, a research associate with BCERF and the co-author of the fact sheet "Herbal Medicines and Breast Cancer Risk," which is available free on BCERF's Web site at http://envirocancer.cornell.edu/ . ...

Research suggests fitness of Florida panthers improved by limited breeding with Texas animals

... that an expanded range for Florida panthers could raise several such social issues. While female hybrids seem to be surviving considerably better than their purebred counterparts, "hybrid males have shorter lives than purebreds," the paper also reports. The authors suspect many of the males are killed by...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...is a positive feedback loop that could continue to raise temperatures in the region and further lengthen the snow-free period each year. Since the early 1960s, scientists have identified "hotspots" of slowly increasing average summer temperatures in the Arctic, from 0.15 degrees Celsius to about 2 degre...

Proposal would allow wild animals to roam North America

...90 percent. With fewer beavers to create dams that raise water tables, fewer wetlands developed to support willows. Today, there are 60 percent fewer willows in parts of Colorado where beavers have declined. Similarly, after major predators became extinct in Montana and Wyoming, the number of moose, which...

Treatments have same target, different responses for lung cancer patients with genetic mutation

... to respond to cetuximab. "Overall, our results raise the possibility that NSCLC patients with EGFR mutations may derive the greatest benefit, in terms of tumor regression, if treated with gefitinib rather than with cetuximab," the authors conclude. "These findings clearly have important clinical imp...

US Army plans to bulk-buy anthrax

...anthrax, in a controversial move that is likely to raise questions over its commitment to treaties designed to limit the spread of biological weapons. A series of contracts have been uncovered that relate to the US army' Dugway Proving Ground in Utah. They ask companies to tender for the production of bu...

Mass production of human papillomavirus could lead to gains against cervical cancer

...virus that would express early gene products could raise additional immune responses against the virus in other stages of its life cycle." Such a vaccine, he suggested, could offer further important advantages against HPV and its associated cancers. ...

A new molecule discovered in the battle between plants and disease

...e a hormone, signaling to the rest of the plant to raise its defenses at the first sign of an infection. They also discovered the receptor protein to which Pep1 binds to exert its protective effects. Pep1 was isolated from the plant Arabidopsis thaliana, which is a species favored by investigators for att...

Gene therapy advance treats hemophilia in mouse models

...ection with gene therapy because if you could just raise the factor VIII activity from less than 1 percent of normal to within 5 to 10 percent of normal, the tendency for spontaneous bleeding and need for hospitalization would diminish dramatically," McCray said. "In the mouse model in our study, we were...

Looks matter to female barn swallows

... quality, such as his health, status or ability to raise young, Safran speculates. The actual cue that female barn swallows use to assess potential mates differ according to regional tastes. For example, classic studies have shown that in the very closely related European barn swallow ( H. rustica rustic...

New protein vital for immune response is found in surprise location

...d from dying from viral infection. "These results raise the possibility that variations in the expression levels of MAVS may endow different individuals with varying ability to fight off viral diseases," said Dr. Chen, who also is an investigator with the Howard Hughes Medical Institute. "Viruses have evo...

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