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Tag: "exposed" at biology news

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...ia may have greater UV resistance because they are exposed to extreme UV radiation in the desert environment. This characterization also may explain why such a high proportion of the bacteria from the most arid site are pigmented ?red, yellow or pink ?as they grow in the laboratory, according to Minkley. Th...

Molecule that usually protects infection-fighting cells may cause plaque deposits inside arteries

...IM six years ago. In the current study, scientists exposed mice lacking AIM to a fatty diet that would normally induce atherosclerosis. After several weeks, researchers found little to no atherosclerotic lesions. Comparatively, in mice that had normal AIM function, there was marked presence of plaque deposi...

Fibril Shape Is The Basis Of Prion Strains And Cross-species Prion Infection

...ephalopathy cases, for example, and lots of people exposed to tainted beef products, but very few cases of variant Creutzfeld-Jakob." He says there "must be protective mechanisms working there, but we don't know what they are." The other members of the Weissman research team include Motomasa Tanaka and Pet...

New lab technique identifies high levels of pathogens in therapy pool

...l attendants probably became ill because they were exposed to high levels of the pathogens by working consecutive, full days in the indoor pool environment. No patients became ill at the facility. The indoor pool water was kept at temperatures of 92 degrees to 94 degrees F and was treated with hydrogen pero...

Newly discovered pathway might help in design of cancer drugs

...nded DNA with special chemical characteristics and exposed it to long wavelength light that selectively switc...y similar to that which is produced when cells are exposed to radiation, with one exception: Greenberg's team's DNA was damaged at only one place on its chain,...

Harmful chemicals may reprogram gene response to estrogen

...conducted by NIEHS scientists indicates that women exposed to DES in utero have a higher risk of uterine fibroids. The National Institute of Environmental Health Sciences, a component of the National Institutes of Health, provided funding to researchers at the University of Texas M.D. Anderson Cancer Center...

Researchers report new pro-inflammatory role for anti-inflammatory enzyme

... Molecular Biology journal. When immune cells are exposed to pro-inflammatory cytokines or bacterial endotoxin (part of the bacterial cell wall) they start to produce inducible nitric oxide synthase (iNOS), an enzyme responsible for the manufacture of nitric oxide (NO). This results in an increase in cellul...

Two are better than one

...onducted in vitro and in lab mice, the researchers exposed the cancer cells to two different antibodies that link up to HER2 receptors. In a synergistic action, the antibodies were shown to cooperate rather than compete for distinctly different attachment points on the architecture of the receptors, resultin...

Leprosy microbes lead scientists to immune discovery

...une cells in blood samples from healthy people and exposed the cells to a component of mycobacteria. The large white blood cells known as monocytes rapidly differentiated into the two distinct cell types, forming the body's emergency response to the detection of foreign bacteria. One category of defensive ce...

Live vaccines more effective against horse herpes virus

...l restrictions for all horses that might have been exposed to equine herpes virus, with special attention pai...f the 15 horses was pregnant. The horses were then exposed to the herpes virus. The study found that the horses with MLV vaccinations consistently had lower f...

Decoding the logic of olfaction

...orant." To explore this question, the researchers exposed mice to each of a wide range of odorants -- includ...woody, garlic, and chocolate. After each mouse was exposed to an odor, the scientists then proceeded to isolate the animal's olfactory cortex and map neural ac...

Genpathway and Baylor College of Medicine Identify New Genes in Breast Cancer

...orant." To explore this question, the researchers exposed mice to each of a wide range of odorants -- includ...woody, garlic, and chocolate. After each mouse was exposed to an odor, the scientists then proceeded to isolate the animal's olfactory cortex and map neural ac...

Compounds in plastic packaging act as environmental estrogens altering breast genes

...the mammary glands of young female laboratory rats exposed to the compounds through their mothers' milk. Raquel Moral, Ph.D., a postdoctoral associate in the Fox Chase laboratory of Jose Russo, M.D., presented the results today at the 96th Annual Meeting of the American Association for Cancer Research. Russ...

Red delicious, Northern Spy apples have most antioxidants, chemists find

...ional meeting in San Diego. * Breast cancer. Rats exposed to a known carcinogen and then fed the human equivalent of one, three or six apples a day respectively over 24 weeks were up to 44 percent less likely to develop breast tumors. That study was published in the April 6, 2005, issue of the Journal of Ag...

Measuring Enzymes At End Of Cancer Pathway Predicts Outcome Of Tarceva, Taxol

...y can be assessed. In this study, the researchers exposed 10 different human breast cancer cell lines to varied doses of Tarceva and then measured activity of the CDK enzymes. They found that tumor cell death was significantly dependent on whether CDK2 activity was repressed. They then double checked those ...

After a time-shift, mixed signals from the circadian clock

...studied clock-resetting behavior in rats that were exposed to a six-hour delay of the light schedule, a shift that mimics a transition from the eastern U.S. to western Europe. By performing electrophysiological analysis of cells that constitute the central circadian clock, the researchers made a surprising d...

Secret of smallpox's success may lead to bioterror cure

... there has been anecdotal evidence that if you get exposed to smallpox and get vaccinated within 4 days of ex...eir ability to protect mice that have already been exposed to a particularly lethal strain of vaccinia, or to mouse pox, another pox virus. "We want to look a...

Hydrogen and methane provide raw energy for life at 'Lost City'

...d with similar rock that is very old, such as that exposed in Barberton, South Africa, which is 3.5 billion years old. Perhaps Lost City can provide additional biomarkers, the chemical remnants of organisms, with which to look for life in those ancient rocks or on other planets. The work being published was...

Wake Forest scientists find new combination vaccine effective against plague

...nt. Thus it is possible for animals that have been exposed to a different bacterial infection to have antibodies against flagellin. But Mizel and his colleagues found that flagellin is equally effective in animals with such antibodies as it is in mice that had never encountered flagellin before. "Prior immu...

Researchers find gene that may be at root of potato blight

...e successfully resisted late blight infection when exposed to P. infestans races that carried the Avr3a gene. However, some races of P. infestans with mutations in their Avr3a gene escaped the resistance response triggered by R3a. Further laboratory analysis showed that when R3a detected Avr3a in a leaf cel...

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