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Tag: "released" at biology news

Novel therapy combinations gain ground in treating hepatitis

...phen) binds to proteins in the liver that are then released into the blood when cells die. As a positive control group, the team also included 10 documented cases of acute liver failure (ALF) resulting directly from large APAP overdoses. Results from the examination showed that nine of the 72 patients (12...

Study finds that a woman's chances of having twins can be modified by diet

...nsulin-like growth factor (IGF), a protein that is released from the liver of animals -- including humans -- in response to growth hormone, circulates in the blood and makes its way into the animal's milk. IGF increases the sensitivity of the ovaries to follicle stimulating hormone, thereby increasing ovulati...

Nicotine exposure during development leads to hearing problems

...hing, such as an important sound, acetylcholine is released into the brain. It then interacts with the nicotinic-acetylcholine receptor and, the UCI study showed, thereby enhances sensitivity to that sound. If that receptor is damaged due to prenatal exposure to nicotine, acetylcholine cannot bind with it and...

Life and death in the hippocampus: what young neurons need to survive

...ated by the neurotransmitter glutamate, a chemical released by neurons in order to transmit information to neighboring cells. Whenever the receptor picks up a glutamate signal it is stimulated and relays the signal. But for newborn neurons that signal means something else entirely -- survival. "When we remo...

Study identifies new role for breast cancer susceptibility gene

... and another known transcription repressor, ZBRK1, released the gene for ANG1 from repression and promoted survival of neighboring blood vessel cells and formation of capillary-like structures. Further studies demonstrated that mouse mammary tumors deficient in BRCA1 display high levels of ANG1 expression, pr...

Light guides flight of migratory birds

... position relative to the home loft when they were released at an unfamiliar site. The birds were housed in a ...clockwise) deflection of homeward orientation when released at a distant site. It turned out, however, that the panels influenced the distribution of polarized ...

Think fast! Rice undergrad unlocks nerve speed secret

... of thousands of vesicles in your optic nerves are released in sequence, opening tiny surface pores to pass chemical signals to the next cell down the line, telling your brain what you're seeing and your eyes where to move. Thanks to two new studies ?including one spearheaded by an undergraduate biochemistry ...

Time of day tempers tadpoles' response to predators

...ess predation risk indirectly by sensing chemicals released by their predators into the water," Fraker said. T...enced by both external factors---the chemical cues released by the predators---and internal factors such as circadian rhythms. This is important for understandi...

Even when faint, ovary scent draws sperm cells

... identified. Systematic study of various compounds released by the female reproductive organs under various conditions might further our understanding of these processes." Understanding why, how and when sperm are attracted to ovaries may help scientists understand problems with human conception. "Defects...

Arctic coring expedition continues to yield new clues

... the last massive amounts of greenhouse gases were released into the Earth's atmosphere ?a period calculated to have occurred 55 million years ago, and known as the Paleocene/Eocene thermal maximum, or PETM. Researchers have long recognized that a massive release of greenhouse gases, probably carbo...

Plants tell caterpillars when it's safe to forage

...arval diurnal and nocturnal activity but volatiles released by the corn. Volatile compounds released during the day encourage hiding while those released at night indicate that it's safe to come out an...

Microbes transform 'safest' PBDEs into more harmful compounds

... the less toxic forms are rendered more toxic when released into the environment." In laboratory animals, high blood levels of PBDE are associated with cancer, lowered immunity, thyroid problems, and learning and memory difficulties. Although PBDE levels in people haven’t reached the levels of laboratory ani...

Diabetes hits 275 Australians each day as pandemic spreads

... by the NH&MRC, industry and state governments released today by the International Diabetes Institute in Melbourne shows diabetes is hitting up to 275 new victims each day throughout Australia. The findings of the Australian Diabetes, Obesity and Lifestyle Study (AusDiab) were presented today to the Fede...

Movie spies on malaria parasite's sneaky behavior

...t infects red blood cells, called a merozoite, was released from a ruptured liver cell and moved on its own back to the bloodstream. But studies in the laboratory have shown that the liver's resident macrophage immune cells happily gobble up free-moving merozoites. "This was a paradox," said Ménard. "We cou...

Scientists take 'snapshots' of enzyme action

...e trimethylamine, a byproduct of protein digestion released by bacteria living in the gut. People with the disorder release trimethylamine through breath, sweat, and urine, producing a fish-like odor that can be embarrassing and result in psychological effects such as withdrawal and depression. People with d...

In drug design, a loose fit may be best bet

...t thyrotropin-releasing hormone, or TRH, a hormone released in the brain that kicks off a chain of events throughout the body, including the stimulation of the thyroid gland. As with many of the body's hormones, cells recognize TRH using a receptor belonging to a mega-family of proteins known as G-protein-cou...

Parallel evolution: Proteins do it, too

... ferment the leaves and take up nutrients that are released in the process. The monkeys, in turn, digest the bacteria to recover the nutrients, such as protein and ribonucleic acid (RNA), a particularly important source of nitrogen in leaf eaters. Zhang focused his attention on RNASE1, a pancreatic enzyme th...

DOE publishes research roadmap for developing cleaner fuels

The U.S. Department of Energy (DOE) today released an ambitious new research agenda for the development of cellulosic ethanol as an alternative to gasoline. The 200-page scientific "roadmap" cites recent advances in biotechnology that have made cost-effective production of ethanol from cellulose, or...

Discovery could aid fight against cystic fibrosis infection

...iscovered that the Hcp1 protein of V. cholerae is released from the bacterium via a novel secretion pathway. Because Hcp1 proteins from both pathogens belong to the same protein family, Mougous wondered whether the Pseudomonas Hcp1 might also be secreted via this pathway. The Harvard and Argonne researcher...

Report focuses on the role good microbes play in future medicine

...se and autoimmune disorders, according to a report released by the American Academy of Microbiology, Probiotic Microbes: The Scientific Basis. "Theoretically, beneficial microorganisms could be used to treat a range of clinical conditions that have been linked to pathogens, including gastrointestinal proble...

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