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Tag: "resistant" at biology news

Fight weeds with plant pathogens

...rol methods in order to prevent the development of resistant weeds or lessen the impact of herbicides on the environment," she said. Weed management is important due to the amount of damage weeds can cause to agricultural productivity. Weeds can reduce crop yields by as much as 12 percent (causing up to $32 ...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

... is that influenza virus does not appear to become resistant to 'protecting virus', although drug-resistance is a serious problem with many microbes. 'Protecting virus' also protects when given up to 24 hours after infection (and possibly longer). It is thus able to counter an actual infection. It could the...

Edible coatings will be the packaging of the future

...h of Mexico. The result is a compound film that is resistant and that maintains suitable mechanical properties. The use of mesquite gum is an economical and efficacious alternative with a promising future, not only for food conservation, but it could also become an economic resource for indigenous peoples, cur...

Eating protein boosts hormone that staves off hunger

...dly obese. The genetically modified mice were also resistant to the beneficial effects of a high-protein diet, the researchers reported, demonstrating a direct connection between protein and PYY. When the researchers treated those hormone-deficient mice with PYY, the animals lost weight. "The findings show...

Discovery of the first resistance gene to rice yellow mottle virus

...ng the impact of RYMV is to be found in the use of resistant varieties. In certain rare traditional varieties...med by genetic transformation. For this, a line of resistant rice was modified by transgenically introducing the allele for susceptibility of this gene. The desc...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

...ia are exposed to harmful agents like antibiotics, resistant strains emerge. Nothing with the killer plasmid survived." The next step was to engineer a strain of bacteria that could suppress over-replication of the key plasmid. This so-called "Trojan horse" could then be used to spread the killer plasmid v...

Fruit fly study identifies gene mutation that regulates sensitivity to alcohol

... researchers found some fruit flies were much more resistant to alcohol sedation. These flies continued to move about much longer than typical fruit flies exposed to the same amount of alcohol. The scientists subsequently identified key differences in a particular gene associated with this behavior. The mutati...

Elusive rust resistance genes located

...ders around the world to breed more effective rust resistant wheat varieties. The genes, Lr34 and Yr18 are i...of resistance to speed up the delivery of new rust resistant wheat varieties." The marker has proven effective in a range of wheats from different backgrounds...

Study shows antibiotic-resistant bacteria responsible for increase in muscle infections

...and cephalosporin family. Some years ago, strains resistant to these drugs, called methicillin-resistant Staphylococcus aureus (MRSA) appeared in hospitalized patients. Recently, however, newer forms of MRSA began to strike healthy people who have not been recently hospitalized or undergone invasive medical p...

Researchers create mouse lacking key inflammation gene

...l mice. Specifically, the deficient mice were more resistant to LPS-induced lethality. "The generation of the macrophage-specific LITAF-deficient animals opens new opportunities for assessing the role of LITAF in inflammation in hopes of designing anti-LITAF drugs for major inflammatory diseases," says Dr. ...

Archerfish tune their shots to universal properties of prey adhesion

...to prey size, and that this strategy appears to be resistant to alteration by experience: It occurs even when the fish have been placed for two years in an environment that has been manipulated to make such tuning unnecessary for successful hunting. The findings suggest that the tuning aspect of the archerfish...

First major study of mammalian 'disorderly' proteins

...use cells called NIH3T3 fibroblasts. The IUPs were resistant to the heat, unlike more structured proteins, which fell apart. Based on these studies, the investigators were able to classify all proteins into one of three categories: IUPs; intrinsically folded proteins (IFPs, i.e., fully folded into specific sha...

Mayo researchers discover HIV dependence on a human protein

...a result, human T cells, HIV's main target, became resistant to HIV. Adding back p75 made them vulnerable again. And adding a "dominant-negative" piece of p75 to the mix, a sort of molecular spanner in the works, further impaired the virus (over 500-fold). Moreover, the Mayo team showed that each "knot" of th...

Transmission of antibiotic-resistant bacteria linked to previous intensive care unit room occupants

... directly linked to a prior occupant who harbors a resistant organism rather than to a particular room," the authors write. Susan S. Huang, M.D., M.P.H., Brigham and Women's Hospital and Harvard Medical School, Boston, and colleagues conducted a 20-month study of 8,203 patients who had 11,528 stays in eight...

Researchers in Montréal and the US create model of key immune-system component

...ath in the world, and the phenomenon of antibiotic resistant bacteria worsens the situation each year. Thanks to the model developed by teams led by Michel Desjardins of the Department of Pathology and Cellular Biology at Université de Montréal, Drs Lynda Stuart and Alan Ezekowitz at the Massachusetts General ...

Key to lung cancer chemo resistance revealed

...ow that cancer cells with KEAP1 mutations are more resistant to chemotherapy drugs than normal lung cells. Tumor samples with normal KEAP1 genes also show increased levels of NRF2 and its enzymes, suggesting other ways of dismantling KEAP1, such as splicing the gene to make a shortened, ineffective protein,...

Lab-on-a-chip could speed up treatment of drug-resistant pneumonia

... in the hospital, you're much more likely to get a resistant strain," Lochhead said. "It's an emerging public-health disaster." The most acute cases are admitted into intensive care units, where doctors have just days, if not hours, to save the patients' lives, Lochhead said. But reliably identifying the ba...

HIV/AIDS linked to extensively drug resistant TB

...h, the study measured the prevalence of multi-drug resistant (MDR) tuberculosis and extensively drug-resistant (XDR) tuberculosis in a hospital in KwaZulu Natal. Between January 2005 and March 2006, sputum samples from 1,539 patients were screened. MDR TB was found in 221 patients and of those, 53 had XDR TB. ...

Funding to tackle hospital superbugs

... (Methicillin Resistant Staphylococcus Aureus) are resistant to one of more conventional antibiotic and require new therapies to aid the treatment of infection. A team in the School of Medicine's Institute of Nephrology has been awarded £800,000 by the Wellcome Trust to commercially develop a protein based th...

Nanotech tools yield DNA transcription breakthrough

...ding tuberculosis, strains such as XDR-TB that are resistant to current antibiotics have emerged." In addit... Soviet Union, were intentionally engineered to be resistant to current antibiotics. Ebright explained that his laboratory at Rutgers' Waksman Institute of Mi...

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