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Tag: "kept" at biology news

A new link between stem cells and tumors

... types: one that is just like the parent, which is kept to maintain the stock, and another that differentiates. This is what happens with neuroblasts. Cell division creates one large neuroblast and a smaller cell that can become part of a nerve. This process is controlled by events that happen prior to di...

Sudden change in social status triggers genetic response in male fish, study finds

...urmeister donned infrared night-vision goggles and kept close watch on the experimental fish tanks. She soon discovered that dominant males undergo a temporary change in the dark--their bright color turns pale, and their eyebar fades. "But when the lights come on, the dominant male slowly reactivates," sh...

Wolves' top-down effect

...the presence of people in the Bow Valley area also kept away other large predators, such as grizzly bears, Hebblewhite and colleagues believe their large-scale natural experiment demonstrates a wolf-driven cascade effect. Only wolves were completely eliminated from the study area and subsequently recovere...

New antifreeze protein found in fleas may allow longer storage of transplant organs

... journal Science. "Transplant organs must now be kept at the freezing point or slightly warmer," says Dr. Graham. "If we can drop the temperature at which the organ is safely stored, there will be a longer preservation period." The hyperactive antifreeze protein produced by snow fleas is different fro...

Molecular Partners Required For Appropriate Neuronal Gene Repression

...rchers then applied HA to these cells which indeed kept the immature cells from maturing into myelin-producing cells. In another key experiment, Sherman and Back confirmed in another animal model of MS that injection of the HA into damaged myelin prevented myelin from reforming where it had already been d...

OHSU researchers discover potential mechanism to repair brain damage linked to Multiple Sclerosis

...rchers then applied HA to these cells which indeed kept the immature cells from maturing into myelin-producing cells. In another key experiment, Sherman and Back confirmed in another animal model of MS that injection of the HA into damaged myelin prevented myelin from reforming where it had already been d...

Researchers develop new testing methods for potential monkeypox or smallpox outbreak

... and smallpox viruses, the smallpox vaccine likely kept these inoculated people from becoming seriously ill. The researchers believe these people were fully protected against monkeypox because smallpox vaccination can provide cross-protective immunity against this virus. "In our study, we found one subje...

Survey Uncovers Surprising Attitudes Towards HIV Vaccine Research

...ve that an HIV vaccine already exists but is being kept a secret. * Most subpopulation respondents ?78 percent of African Americans, 68 percent of men who have sex with men and 57 percent of Hispanics ?either do not know whether or incorrectly believe that the vaccines being tested can cause HIV infec...

Lactose intolerance linked to ancestral environment

... fact that these groups maintained small herds and kept them moving probably reduced the pathogen transmission rate." According to the National Digestive Diseases Information Clearinghouse, some 30 million to 50 million Americans are lactose intolerant, including up to 75 percent of African Americans and...

WCS says avian flu prevention should focus on farms, markets

...e markets--where wild and domesticated species are kept in close proximity--are also hubs of transmission for avian flu and other pathogens that need to be better regulated. Wildlife and health experts also maintain that indiscriminate culling of wild migratory bird populations would be ineffective in pre...

Why do aneurysms form? New studies suggest leading role for white blood cells

...th an antibody that attacked their neutrophils and kept the levels of the cells circulating in the blood artificially low. They applied the enzyme elastase to the aortas of these mice and normal control mice. Two-thirds of the control mice developed an aneurysm at the injury site within two weeks, with an...

Bird samples from Mongolia confirmed as H5N1 avian flu

...e markets, where wild and domesticated species are kept in close proximity, and risk exposure to a wide range of pathogens. Wildlife and health experts, including the F.A.O., maintain that indiscriminate culling of wild migratory bird populations would be ineffective in preventing the spread of avia...

Discovery suggests why stem cells run through stop signs

...a fruit fly homologue of a human tumor suppressor) kept the stem cells from proliferating. "Determining which of the 80 microRNAs is responsible for deactivating the stop signal is the next step of our research," said Ruohola-Baker. "The list of chores that microRNAs do within cells keeps growing in new...

New defibrillator signals doctor of patient's irregular heartbeat or device malfunction

...t can be placed on a nightstand, worn on a belt or kept in a purse. In addition, Biotronik's Home Monitoring system virtually instantaneously sends a beat-by-beat record (similar to an electrocardiogram (ECG)) of any heart rhythm abnormality which the doctor can view on a secure website. "The patient ...

Researcher gets NSF grant to create mutant maize lines

...n each line while the 50,000 or so other genes are kept exactly the same from seed to seed. A missing gene may alter processes in ways that are easily visible to the naked eye or through biochemical or physiological analysis. Such experimentation will give researchers a better understanding of the relatio...

Confirmation of human protein interaction data by human expression data

...d fish in a breathable, Jell-O-like substance that kept the fish alive but immobile. The researchers could then focus video cameras on the fish’s developing brain to watch how the branches of individual neurons grew and shrank over time. It turns out that determining which of the branches will grow follo...

Speak up: Louder neurons form more connections

...d fish in a breathable, Jell-O-like substance that kept the fish alive but immobile. The researchers could then focus video cameras on the fish’s developing brain to watch how the branches of individual neurons grew and shrank over time. It turns out that determining which of the branches will grow follo...

Mice brains shrink during winter, impairing some learning and memory

...ooted mice. Using artificial light, some mice were kept in short days ?such as they would face in winter ?...before the beginning of the study. Other mice were kept in long days, simulating summer, with 16 hours of daylight for 13 weeks. Their spatial learning and...

Researchers Closer To Helping Hearing-Impaired Using Stem Cells

...n treatment. The cells can be collected easily and kept alive in the laboratory until needed, she said. Other researchers had previously shown that the marrow stromal cells could be induced to transform into neuronal cells, but it wasn’t clear whether, or how, the cells could be further transformed into ...

Some Brain Cells Change Channels

... the swap, sodium can still get in, but calcium is kept out. To learn more about how this takes place, the Hopkins researchers studied brain cells from genetically engineered mice. Through their experiments, the researchers determined that the PICK1 and NSF proteins are both required for the calcium-forb...

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