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Tag: "culture" at biology news

Mummy's amazing American maize

...een as great as previously thought. "The entire culture of South America changed when the Europeans arrived in the 15th century ?everything from the language to the whole way of life," explained Professor Terry Brown, who headed the research in the Faculty of Life Sciences. "Maize is the staple food cr...

Scientists clone mice from adult skin stem cells

...ell lines, a process which can be done in a tissue culture dish and which is simpler and more efficient than generating a cloned mouse. Although this procedure has not yet successfully generated human embryonic stem cell lines, once technological hurdles are overcome, it may be possible in the future to use ...

New protein inhibitor impedes growth of cancerous cells

...y halt the growth of cancerous cells, both in cell culture and in an animal model for human tumor growth. BI 2536 caused growth arrest and cell death in cell lines derived from a variety of human cancers, and it inhibited the growth of human tumor grafts in mice, resulting in the death of tumor cells and reg...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...own without mouse feeder layers and in a "defined" culture medium that is compatible with clinical use and demonstrating for the first time that such preparations are consistent with a therapeutic impact. Sandhoff results from a genetic mutation that reduces the body's supply of an enzyme, called hexos...

3 proteins may play important role in nerve-cell repair

...e of rats and mouse neuroblastoma cells growing in culture to learn more about the three proteins and their involvement in cAMP regulation. The researchers added additional copies of the three genes to the cells to increase the levels of the proteins, and then used a laboratory technique called RNA inter...

Imaging techniques permit scientists to follow a day -- or four -- in the life of a cell

...e chamber. This device is designed to optimize the culture environment for cells--allowing them to grow as they would normally--while optimizing the conditions for viewing them by microscopy. This enables researchers to monitor the cells under a microscope for long time periods (in excess of four days), duri...

Farmed salmon could become an invasive species in forest streams

...ays research fish biologist Peter Bisson. "Net pen culture of salmon is big business worldwide, and both advocates and opponents of salmon farming have been very vocal in stating their views. I wanted to look at the hard evidence to determine the short- and long-term risks to native species in streams on Nat...

Bypassing eggs, flu vaccine grown in insect cells shows promise

...us to grow as you want in eggs.? The use of cell culture systems to grow vaccines ?using viruses as tiny factories to churn out mass amounts of vaccines ?is a growing business. A similar technology using human cell lines is used to produce the hepatitis B vaccine, while one form of a vaccine against human ...

Study shows isolation of stem cells may lead to a treatment for hearing loss

...nfirming the ability to form ‘stem cell?spheres in culture and by characterizing these cells in terms of neural and hair cell development using a panel of stem cell development and hair cell markers. The formation of spheres from early postnatal cochlear tissues and their expression of a wide range of devel...

Intelligent materials to regenerate bone tissue

...egradable nature. Also to be developed is the cell culture in three dimensions, as well as ensuring the biocompatibility of the material....

Growing nerve cells in 3-D dramatically affects gene expression

...g, adds to a growing body of research showing that culture techniques can significantly affect cell growth an...own bioengineer who spearheaded the new study, "so culture method is critical. If you want to better understand how the human body behaves or how new drugs mig...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...Thompson writes, "it has much to tell us about the culture that created it." (2pAAb1) REHABILITATING THE WORLD'S WORST SOUNDS Something that is very 21st century is the ability to gradually morph, or transform sounds from one to another. A variation of morphing is to transfer the features of one so...

Thymus transplants gives hope to babies with fatal immune disease

...o the heart. The removed thymus tissue is grown in culture for several weeks in a laboratory while researchers ensure that there are no diseases present in the tissue. Strips of tissue are then implanted in the baby's thigh, where they attract a blood supply and begin to act like a thymus gland. Within three...

Asexual worm quickly adapts to soil contamination

...us. This asexually reproducing nematode is easy to culture and study. The research is innovative due to a multidisciplinary approach, in which methods from various disciplines such as ecology, toxicology, molecular biology and evolutionary biology provide insights into the effect of soil pollution at differe...

DNA-damage test could aid drug development

...logy and Whitehead Institute have developed a cell culture test for assessing a compound's genetic toxicity that may prove dramatically cheaper than existing animal tests. This assay would allow genetic toxicity to be examined far earlier in the drug development process, making it much more efficient. Like ...

Detecting cold, feeling pain: Study reveals why menthol feels fresh

...izes the receptor, both in sensory neurons in cell culture and in mice. The cells in culture were unresponsive to cooling agents, including menthol. The genetically engineered mice did not disc...

Avian influenza survivors' antibodies effective at neutralising H5N1 strain

...y and prove effective at neutralising the virus in culture vitro and in mice. The H5N1 influenza virus has caused disease and death in millions of poultry across the globe and occasionally has been transmitted to humans, often fatally. By mid-May 2007, according to the World Health Organization, there had b...

Researchers develop buckyballs to fight allergy

... are able to block allergic response in human cell culture experiments. Buckyballs, or fullerenes, are nanoparticles containing 60 carbon atoms. Due to their unique structure, inertness and stability, researchers from a number of scientific fields have been investigating the tiny, hollow carbon cages to ...

Mutating the entire genome

...of Health effort to mutate all mouse genes in cell culture and create 900 new lines of mutant mice by 2010 – an effort NIH says “will be extremely useful for the study of human disease.” Simpler, Faster Mutations in the Whole Mouse Genome Existing gene-targeting methods for deleting large segments o...

University of Pittsburgh School of Medicine researchers develop 'off-the-shelf' vascular grafts

... immediately or, at most, after a relatively short culture period. This suggests that we could make these available ‘off-the-shelf,’ which is an essential element for clinical translation,” he explained. ...

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