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Tag: "grew" at biology news

It's not all genetic: Common epigenetic problem doubles cancer risk in mice

...tion but whose IGF2 levels were normal. The tumors grew at the same rate in both sets of mice, suggesting that more tumors get started in the mice with extra IGF2, notes Feinberg. "In the mice, loss of imprinting of IGF2 roughly doubles the risk that the genetic mutation will cause a tumor," says postdoc...

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

...m in the growth medium," Varki said. When the team grew thecells in heat-inactivated human serum specially selected for lowconcentrations of anti-Neu5Gc antibodies, the immune response wassignificantly reduced, but not completely eliminated.In their experiments, the researchers used recently developed pro...

Research on Worms Yields Clues on Aging

...pened to have anti-aging activity."The researchers grew the roundworm C. elegans in the presence of the 19drugs and found that an anticonvulsant, ethosuximide, extended theworms' lives from an average of 17 days to an average of 20 days.Further tests on anticonvulsants revealed that they also increased li...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

... Maron, and USFWS biologist Vernon Byrd. The study grew out of conversations between Estes, who has been doing research in Alaskan coastal waters for decades, and Byrd, the supervisory biologist for the Alaska Maritime National Wildlife Refuge. While working to save the endangered Aleutian Canada goose, w...

Scientists discover unique microbe in California's largest lake

...rsity. ScottMiller, the lead author on the paper, grew the organism from samplescollected by Wood and Hurlbert. Now an assistant professor ofbiological sciences at The University of Montana, he was working withWood as a graduate research associate when he first noticed theorganism's unusual lime-green co...

New methods of gene delivery using lasers

...asting damage. After inserting the genes, the team grew the cells, which appeared to remain healthy and multiplied normally. The presence of the inserted gene in the multiplied cells was then confirmed by observing the red/green fluorescent proteins produced by the ‘new?gene. The study is published today...

World's largest rainforest drying experiment completes first phase

...nstead a decrease in the rate at which tree trunks grew in diameter. Many small trees, measuring 4 to 10 inches in diameter, simply stopped growing during the end of the dry season of 2000, following the first period of rainfall exclusion, as the trees of similar size continued to grow in the "control" fo...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

...when the brain grows significantly. Once the pups grew up, Bilbo and her colleagues tested the adults' memory about 60 days after birth. To test memory, each rat was allowed to explore a novel experimental chamber for several minutes on the first day. On the second day, each rat was placed back into the ...

Genetically modified rice in China benefits farmers' health, study finds

...tion for participating in the two-year study. They grew the rice without help or advice from technicians, ...ds to genetically modified rice and 32 farmers who grew only conventional rice varieties. Data from the surveys revealed that the characteristics of the fa...

Researchers devise way to mass-produce embryonic stem cells

...uyang, a doctoral student in chemical engineering, grew mouse embryonic stem cells in a bioreactor. Cell g...al meeting of the American Chemical Society. They grew some mouse embryonic stem cells in a flask ?a conventional way to grow stem cells ?while other stem ...

Cerebral navigation: How do nerve fibers know what direction to grow in?

... neurons whose ephexin1 was inactivated, the axons grew into the hind limb prematurely, indicating faulty axon guidance. "Understanding these pathways could help in understanding the process of nerve regeneration," says Greenberg, who is also Professor of Neurology and Neurobiology at Harvard Medical Sch...

Study reveals dramatic difference between breast cancers in US and Africa

... genetics with a close African connection. Olopade grew up in Nigeria, retains close ties with cancer specialists there and returns frequently to teach, for research -- and to visit. She worked with Nigerian researcher Francis Ikpatt, who is completing a three-year post-doctoral fellowship in Olopade's la...

Could microbes solve Russia's chemical weapons conundrum?

...-perhydrothiazine (PHT). Ermakova's research team grew P putida in cultures containing mustard RM. They then moni-tored the levels of PHT derivatives in the cultures until the bacteria stopped growing, using monoethanolamine (MEA) and ethylene glycol (EG) ?both residual components of the initial de-toxif...

Critical step traced in anthrax infection

...of anthrax toxin into human cells. The work, which grew out of an ongoing effort to produce a better anthrax therapeutic, shows that the protective antigen component of the bacterial toxin plays an active role in transferring the other two components of the toxin through the cell membrane. The research, ...

Novel live reporting system to track cells

...fying the genetically modified cells. This method grew out of a joint vision that originated 10 years ago in collaboration with the late Dr. Yoav Citri. Ferritin's advantage is that it is visible in MRI without the need for an additional contrast material. This technique has far-reaching implications for...

Speak up: Louder neurons form more connections

...in to watch how the branches of individual neurons grew and shrank over time. It turns out that determining which of the branches will grow follows an age-old axiom: The squeaky neuron gets the grease. “Louder neurons drown out their quieter neighbors,?Smith said. Working out this seemingly simple rule ...

Confirmation of human protein interaction data by human expression data

...in to watch how the branches of individual neurons grew and shrank over time. It turns out that determining which of the branches will grow follows an age-old axiom: The squeaky neuron gets the grease. “Louder neurons drown out their quieter neighbors,?Smith said. Working out this seemingly simple rule ...

Researchers grow stem cells from human skin

...ith organ or tissue rejection." The research team grew mesenchymal stem cells, a type of stem cell normal...able to isolate single stem cells, which they then grew in culture dishes in the laboratory. The scientists used hormones and growth factors to coax the ste...

New complete muscle grown in the lab

...ts from the Massachusetts Institute of Technology, grew the muscle from scratch by seeding a sponge-like, three-dimensional plastic scaffold with myoblasts and endothelial cells, which are the precursors to mature skeletal muscle and blood vessel cells. The researchers also added connective tissue cells c...

Gene expands malaria's invasion options

... grow in the absence of sialic acid, although they grew normally on cells with the sugar - further suggesting that activation of the PfRh4 gene is required for switching from sialic acid-dependent to - independent invasion. "Activation of PfRh4 represents a previously unknown mechanism to switch invas...

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