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Tag: "adult" at biology news

Stem cells' electric abilities might help their safe clinical use

...ly for ESCs and their derivatives, but perhaps for adult stem cells as well." Li adds that much more work is necessary to know for sure. ...

Researchers discover why melanoma is so malignant

... during embryonic development, Slug is shut off in adult tissues." But when skin cells in, say, an individual's mole, become malignant, they readily reactivate Slug and gain the ability to spread--something that other cancers can spend decades trying to do. Weinberg's team demonstrated this through a num...

Prostate cancer uses Wnt signaling proteins to promote growth of bone tumors

...hown to be involved in abnormal bone production in adult animals with prostate cancer." Hall is first author of a paper to be published in the Sept. 1 issue of Cancer Research, which presents results from U-M studies of Wnt proteins in human prostate cancer cell lines and in laboratory mice injected with...

Good news for the medical marijuana movement: pot proliferates brain cells and boosts mood

... there is a positive correlation between increased adult neurogenesis and modified behavior following chron...are perhaps the only illicit drug that can enhance adult neurogenesis and subsequently modify behavior. ...

A new window into structural plasticity in the adult visual cortex

Neuroscientists have known for decades that the adult brain can reorganize neural pathways in response t... the continuous monitoring of neurons in the mouse adult visual cortex over the course of a few months, revealing that the adult brain can indeed rewire its ...

Oil spills and climate change double the mortality rate of British seabirds

...that major oil spills double the mortality rate of adult guillemots in Britain, even though the pollution occurs hundreds of miles from the birds' breeding grounds. The research, which is to be published in the November issue of Ecology Letters also shows a direct link between a warmer climate in the North...

Sickle cell disease corrected in human models using stem cell-based gene therapy

...suppress abnormal hemoglobin formation. Tested in adult stem cells from SCD patients, researchers found that the newly formed red blood cells made normal hemoglobin and suppressed production of the sickle shaped hemoglobin typical of the disease. "Sickle cell disease can only be cured by transplanting he...

New clues to the dark side of a key anti-tumor guardian

...fects of disrupting this protein in the neurons of adult fruit flies. They found that expression of a so-called "dominant-negative" version of p53--that is, a disfunctional version of the protein that inhibits the activity of normal p53--extended flies' life span and increased their ability to withstand ge...

MIT researcher finds neuron growth in adult brain

Despite the prevailing belief that adult brain cells don't grow, a researcher at MIT's Pico...e. "Knowing that neurons are able to grow in the adult brain gives us a chance to enhance the process and explore under what conditions -- genetic, sensory...

'Acid rain' and forest mass: Another perspective

...ants. Magnesium deficiency was observed in all the adult formations studied. The acceleration of the return of nutrients and the drop in the efficiency of their use is proposed as an explanation of this disorder. Thanks to this investigation, it was concluded that the atmospheric deposition of contaminant...

2005 AIDS figures released by WHO and UNAIDS

... in several languages. There is new evidence that adult HIV infection rates have decreased in certain coun...IV prevalence over the past few years with overall adult infection rates decreasing in Kenya from a peak of 10% in the late 1990s to 7% in 2003 and evidence ...

Earliest European Farmers Left Little Genetic Mark On Modern Europe

... in several languages. There is new evidence that adult HIV infection rates have decreased in certain coun...IV prevalence over the past few years with overall adult infection rates decreasing in Kenya from a peak of 10% in the late 1990s to 7% in 2003 and evidence ...

New neurons take baby steps in the adult brain

.... For more than a century, scientists thought the adult brain could only lose nerve cells, not gain them, ...including humans, and become a working part of the adult brain in mice at the very least. In the first study to show how these "baby" neurons are integrate...

Newly discovered birdlike dinosaur is oldest raptor ever found in South America

...seum. The holotype, or definitive, fossil of this adult dinosaur is in excellent condition: articulated and nearly complete. An additional partial skeleton discovered on an earlier expedition led by Apestegua helped fill in missing bones. Since discovering the first two Buitreraptor fossils, the scientist...

Past experience of pheromones induces dominant courtship behavior in fruit flies

...flies, researchers have begun to understand how an adult fly's earlier experience as a young individual can...heromone signals in the context of experience with adult flies can influence how young flies will behave once they reach maturity. The work is reported by J...

Neurons generated in the adult brain learn to respond to novel stimuli

...rain cells that develop in the olfactory system of adult mice appear to play a role in the brain different from that of older neurons. The new olfactory neurons are especially sensitive to novel stimuli, preferentially learning to respond to new odors. This level of flexibility suggests that such newly-g...

Cells from amniotic fluid used to tissue-engineer a new trachea

... "And fetal healing is very good it's better than adult healing." Fauza, whose research lab works closely... of tissues. Currently, most tissue engineers use adult cells to create their lab-grown tissues. While Fauza has also used cells from the ear and from the b...

How Fruitflies Know It's Time for Lunch

...her used genetic analysis to gain insight into the adult and larval neural networks that use taste information to regulate eating. Specifically, they found that several types of neurons responsible for coordinating taste signals express the gene hugin (hug), a gene linked to abnormal eating activity and ex...

New understanding of regeneration gained by Forsyth scientists

...am ultimately hope to gain an understanding of how adult stem cells are controlled by gap-junctional communication (GJC). As reported in the November 15 issue of Developmental Biology, Dr. Levin's research team cloned and characterized the expression of twelve members of the innexin gene family during pl...

Gene Expression in the Aging Brain

...d each comparing brain regions in young versus old adult humans. In four different regions of the cortex (the brain region responsible for higher functions such as thinking), they found a similar pattern of age-related change, characterized by changes in expression of hundreds of genes. In contrast, expres...

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