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Tag: "exposed" at biology news

Researchers discover way to make cells in the eye sensitive to light

...d melanopsin. When the mice lackingmelanopsin were exposed to low light, their pupillary response was thesame as normal mice, but when they were exposed to bright light theirpupil constriction was incomplete.The researchers believe that while not a cure...

Source of molecular triggers in cutaneous T cell lymphoma identified

...hat are pre-programmed to respond to self-antigens exposed during normal cell death. As cells undergo the process of apoptosis, cryptic -- or masked -- antigens, are uncovered. Those newly available antigens are presented by LC directly to CTCL receptors, stimulating the malignant cells rapidly divide. "Thi...

Controversial drug shown to act on brain protein to cut alcohol use

...to return to uncontrolled drinking ordrug use when exposed to the drug of abuse months or even years afterbreaking the habit.In this analysis, the researchers provided alcohol to rats until theyhad become "experienced" daily drinkers. They then withheld alcohol fortwo weeks, which normally leads to greatly i...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

...new human embryonic stem cellsthat have never been exposed to Neu5Gc-containing animal products ofany kind," ...ved human embryonic stem cellsthat have never been exposed to any animal products, and ideally, onlyever exposed to serum from the intended transplant recipien...

Tiny particles could solve billion-dollar problem

...lluted groundwater to the surface, where it can be exposed to chemical catalysts or microorganisms that break the TCE down into less toxic or non-toxic constituents. In general, chemical catalysis offers faster reactions times than bioremediation schemes but also tends to be more expensive. One of the major...

Transplantation Of Monkey Embryonic Stem Cells Reverses Parkinson Disease In Primates

...erated neurons frommonkey embryonic stem cells and exposed these cells to FGF20, a growthfactor that is produced exclusively in the area of the brain affectedby Parkinson disease and is reported to have a protective effect on DAneurons. The authors observed increased DA neuron development andsubsequently tra...

Inflammatory molecules released by pollen trigger allergies

...ergy-promoting immune response. Pollen from plants exposed to air pollutants produce more of these allergy-provoking compounds than do pollen from unpolluted areas, possibly explaining why allergies are more prevalent in places with high levels of car exhaust emissions. Traidl-Hoffmann and colleagues showed...

Research on Worms Yields Clues on Aging

...on University School ofMedicine in St. Louis. When exposed to drugs used to treat epilepsy inhumans, worms lived longer and retained youthful functions longer thannormal.Because the drugs affect nerve signals, the researchers' observationssuggest that the nervous system influences aging processes. Thefinding...

Female sex hormones play a vital role in defense against sexually transmitted diseases

... mice were treated with hormones but, before being exposed to the real herpes virus, they received a vaccine Surprisingly, unlike in the first study, the progesterone-treated mice and the mice that received no hormones were the most protected. About half the mice in the combination hormone group were also p...

Purdue proves concept of using nano-materials for drug discovery

... making the treatment less effective. Cancer cells exposed to chemotherapy drugs produce a disproportionately large number of the pumps, causing the cells to become progressively more resistant to anticancer drugs. Engineers and scientists in the Purdue center are trying to find drugs that deactivate the pu...

Researchers discover molecule that causes secondary stroke

...ys team member Gail Pyne-Geithman, PhD, it must be exposed to powerful oxidizers that cause the production of significant amounts of the BOXes. The correlation between elevated BOXes, bilirubin and oxidative stress in this study, she says, was "striking." The researchers point out that although their findin...

Zebrafish may hold key to understanding human nerve cell development

...lopment fora number of reasons. The hair cells are exposed and can be easily seenunder the microscope in the live fish. We can also visually identifythe consequences of gene defects in the 200 to 300 embryos each femalefish produces," she said.By studying these mutant embryos, Piotrowski and her colleaguesdi...

Harmful Bacterium Commonly Found in Poultry May Survive Refrigeration and Frozen Storage Combined

...lopment fora number of reasons. The hair cells are exposed and can be easily seenunder the microscope in the live fish. We can also visually identifythe consequences of gene defects in the 200 to 300 embryos each femalefish produces," she said.By studying these mutant embryos, Piotrowski and her colleaguesdi...

GenMAPP 2.0 released

...lopment fora number of reasons. The hair cells are exposed and can be easily seenunder the microscope in the live fish. We can also visually identifythe consequences of gene defects in the 200 to 300 embryos each femalefish produces," she said.By studying these mutant embryos, Piotrowski and her colleaguesdi...

Antibodies from plants protect against anthrax

...easures to enable authorities to treat individuals exposed to bioterror agents such as anthrax," says Les Bai...n or after exposure as treatment. "If you've been exposed to an agent, you want protection as soon as possible. Vaccination can take a very long time to build...

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...hydrogen protons in water molecules after they are exposed to a magnetic field and radiofrequency pulses. These signals are then converted into an image. Ahrens' new MRI reporter alters the magnetic field in its proximity, causing nearby protons to give off a distinctly different signal. The resulting image ...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

...he surface of a specific type of tumor cells. When exposed to near-infrared light, which can travel through tissue, the fluorophores within the polymersome respond with a bright near-infrared signal that can then be detected. "The fluorophores function like reflectors stuck in the spokes of a bicycle tire,"...

How the environment could be damaging men's reproductive health

...being at the top of the food web, particularly are exposed to POPs." The researchers found that larger amoun...otentially harmful environment where they might be exposed to heat, vibration or chemical, but the prevalence of cryptorchidism was slightly higher. It rose fr...

Pulsating ultrasound enhances gene therapy for tumors

...(NIH), short pulses of HIFU can be used to prevent exposed tissue from becoming too hot and damaged. Pulsed-H...ebrates--was visible in all sections of the tumors exposed to pulsed-HIFU. Tumors not targeted with pulsed-HIFU showed negligible signs of the gene. An analys...

HIV vaccine trial breaks ground for future research

...group. Those with high-risk behavior may have been exposed frequently to HIV and a primed immune response, probably cellular or humoral, could have worked with the vaccine and caused a greater ability to resist the virus. For the non-white group, the authors suggest that biological differences in immune resp...

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