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Tag: "adult" at biology news

Stem Cells Found In Cerebellum; Possible Cell of Origin for Childhood Brain Tumors

... potential to differentiate into multiple types of adult cells. They are known for their unique ability to proliferate extensively and give rise to both new stem cells as well as a host of specialized cells that perform designated tasks in a particular tissue or organ. But when stem cells become activated ...

Elderly mice yield clues to the process of growing old

...nced with the loss of some critical cells, notably adult stem cells from some tissues and that are essential for replacing cells that die. "If these stem cells are lost, tissue structure and the ability of tissue to regenerate are impaired," Prolla explains. "We have observed that in tissues like bone marr...

Neurologix announces positive results of gene therapy clinical trial in Parkinson's disease

...-associated virus, or AAV) for the treatment of an adult neurological disease. In the Neurologix-funded trial, the vector was injected into a specific target site in the brain in order to transfer a gene to treat Parkinson's disease. The gene encodes glutamic acid decarboxylase (GAD), an enzyme which syn...

South Africa still debating how to tackle HIV/AIDS when 5 million are infected

...oops are infected with HIV - a similar rate to the adult population at large. The army is taking part in a US-funded programme to see how AIDS is affecting its combat-readiness, and this includes giving anti-retroviral drugs (ARVs) to some 1,000 soldiers. ...

AIDS expert says global strategy needed to combat feminization of HIV/AIDS

...ly to be infected than men. Women make up half the adult population living with the virus in the Caribbean and one-third of those in Latin America. The reasons for the rise in female cases differ among countries, with 97 percent of female HIV infections in the United States due to heterosexual transmissio...

Hormones and growth: The control of body size and developmental growth rate in fruit flies

...s before undergoing metaphorphosis and emerging as adult flies. In insects, it was previously found that th...l the timing of metamorphosis and the body size of adult flies. They showed that artificial enlargement of the prothoracic gland appeared to cause an overest...

A vaccine to kill tapeworm

...alia, targets a tapeworm called Taenia solium. The adult form, caught from eating undercooked pork, grows o...n vast numbers in the faeces of those carrying the adult form. The eggs hatch in the intestine and the immature parasites, known as oncospheres, burrow throu...

Research suggests fitness of Florida panthers improved by limited breeding with Texas animals

...nd 20 hybrids survived long enough to also receive adult radio collars, according to the paper. The researchers followed how well the kittens born to purebreds survived and compared them to the hybrids -- those that had Texas mothers or grandmothers. "More than three times as many hybrid kittens appear to...

Researchers make 'embryonic-like' stem cells from umbilical cord blood

...n embryos. Research has so far relied on so-called adult cells found in blood and bone marrow from birth onwards or cells grown from embryos. The new type detected by the team harnesses the benefits of both. "We have found a unique group of cells that bring together the essential qualities of both types of...

Insight into the processes of 'positive' and 'negative' learners

...n embryos. Research has so far relied on so-called adult cells found in blood and bone marrow from birth onwards or cells grown from embryos. The new type detected by the team harnesses the benefits of both. "We have found a unique group of cells that bring together the essential qualities of both types of...

Researchers propose measures to curb lion attacks in Tanzania

...n embryos. Research has so far relied on so-called adult cells found in blood and bone marrow from birth onwards or cells grown from embryos. The new type detected by the team harnesses the benefits of both. "We have found a unique group of cells that bring together the essential qualities of both types of...

UQ researcher tracking key to healing the brain

...he role and regulation of neural stem cells in the adult brain will undoubtedly revolutionise our understan...e in the lab which first reported the existence of adult neural stem cells, then worked for two years at NeuroSpheres Ltd, a biotech company focused on using...

Gene loss accelerates aging

...works, we devised a system for eliminating it from adult mouse tissues. What struck us right away was that these p63 deficient mice were aging prematurely," says Alea Mills of Cold Spring Harbor laboratory, who led the research. Mice that are born without the p63 gene do not survive. Therefore, Mills had ...

Researchers find molecule that inhibits regrowth of spinal nerve cells

...ally insulates and stabilizes long nerve fibers in adult vertebrates ?chemically blocks the ability of nerv...normally is present as a 'wall' down the middle of adult spinal cords, also is found in very high levels in adult myelin," said Dr. Parada. The researchers ...

Stem cells bring fast direct improvement, without differentiation, in acute renal failure

...erse effects occur after in vivo administration of adult MSC. * Also to be determined is whether renoprotective and gene-modulating effects of MSC "are primary actions that are humorally elicited by these cells or whether they result from the improvement of tissue injury by as yet unknown factors rele...

Gradient guides nerve growth down spinal cord

...e many other body components, damaged axons in the adult spinal cord cannot adequately repair themselves. An estimated 250,000 people in the United States suffer from permanent spinal cord injuries, with about 11,000 new cases each year. This study focused on corticospinal neurons, which control voluntary...

DNA from feathers tells tale of eagle fidelity

... in Kazakhstan. Their analysis showed that not one adult strayed from its mate - a degree of fidelity highly unusual among birds, the vast majority of which mate with and raise offspring from multiple partners. Not only is this study the first to confirm monogamy in eagles, more importantly, it also is th...

Molecular mechanism of feather formation found

...thers occur in the duck and other birds, including adult chickens, and are not characterized as downy. The more primitive young chicken feathers, which are downy, are called plumalaceous. "We don't have empirical evidence for this yet, but mathematical analyses lead us to believe that the addition of a th...

Forsyth scientists find three bacteria associated with oral cancer

...cannot overemphasize how important it is for every adult to be examined by a dental or medical health professional for signs of oral cancer at least once a year." Although oral cancer is primarily a disease of adults over the age of 40, younger adults are also at risk--especially if they chew spit tobacco ...

Scientists find a maturity gene in fly

...ticle. Then ?nine days after the egg was laid ?the adult fly crawls out of the pupal case. Fruit flies have a two-month lifespan. "Teenagers are very pupal ?they go inside their shell and withdraw," Thummel says. "Steroid hormones take over your kids, and they look very different and behave very different...

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