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Tag: "reversal" at biology news

Controversial drug shown to act on brain protein to cut alcohol use

...n rats, we have established a link between GDNFand reversal of addiction -- knowledge of a molecular mechanism thatshould allow development of a new class of drugs to treat addictionwithout Ibogaine's side effects," said Dorit Ron, PhD, UCSF associateprofessor of neurology and also principal investigator at t...

World's largest rainforest drying experiment completes first phase

...ged drought? Although it is difficult to imagine a reversal of the current trend in rainforest drying, it is important to understand the forest's response to this scenario nonetheless. What types of trees will invade the forest that has now been "released" from its imposed drought? And are the trees that surv...

Cellular Defects in Premature Aging Disease are Reversible

...s a therapeutic strategy. The fact that a progeria reversal can be achieved in multiple cell types, and that the cells can return to normal, independent of cell division, bolsters this possibility. "Some tissues in our body do not divide," Misteli pointed out. "So demonstrating that we can rescue the normal p...

U of MN researchers reverse memory loss in mice

...n be reversed. The research suggests that the same reversal may be possible in humans, and that people with Alzheimer's disease may be able to recover memory and improve in cognitive function if they can halt progression of the disease. The study measured the mice's spatial memory through a water maze--a poo...

Change in gene may be underlying molecular defect in some colorectal cancers

... as approaches to chemoprevention and "whether the reversal of DNA methylation in precancerous cells may prevent the development of new primary cancers in the same organ," they write. ...

Ancient anthropoid origins discovered in Africa

... Biretia's nocturnality represents an evolutionary reversal from a diurnal ancestor, but that conclusion is based solely on the probable pattern of relationships. If down the road we find out that our phylogeny was wrong, Biretia could end up being very significant for our understanding of the origin of anthr...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

...rth's polarity today. Since the last magnetic pole reversal was 790,000 years ago, the rock must be at least that age. Because the Earth's magnetic polarity changes, on average, every 250,000 years, the argon/argon date is consistent with a time between 1.07 and 1.77 million years ago when the Earth's polarit...

Uncovering sex-change secrets of black sea bass

...nd GreatBay Aquaculture to study what triggers sex reversal in black sea bass ?and how to prevent it. Berlinsk...s, determining optimal sex ratios and delaying sex reversal by controlling density," he notes. "We've already made strides toward making black sea bass aquacult...

Chromosomal abnormalities in sperm higher after vasectomy reversal

...and also between the time interval after vasectomy reversal and the total sex chromosome aneuploidy rate ?i.e. the long ago the reversal the better the chances of producing normal sperm. "This study raises a lot of questions", said Prof...

Therapeutic role found for carbon monoxide

... normal pressures and heart weights (indicative of reversal of imminent heart failure). The scientists next identified how this was happening. "We determined that CO was exerting these effects by both arresting growth of the vessels' smooth muscle cells and inducing apoptosis, or cell death," he adds. Conse...

Fighting like a girl or boy determined by gene in fruit flies

...slow to retreat. The flies undergo a major role reversal when the male and female gene versions are switched. With a feminine fruitless gene, male flies adopt more ladylike tactics, mostly the head butt and some shoving. With the masculine fruitless gene, females instinctively lunge to the exclusion of the...

Pressured by predators, lizards see rapid shift in natural selection

...rimentally. We predicted, and then demonstrated, a reversal in the direction of natural selection acting on limb length in a population of lizards." Losos and colleagues studied populations of the lizard Anolis sagrei on minuscule islands, or cays, in the Bahamas. They introduced to six of these cays a lar...

End of deforestation in view? Experts advance new way to size up global forest resources

...sive strategies. Says Mr. Ausubel: "This great reversal in land use could stop the styling of a Skinhead Earth and begin a great restoration of the landscape by 2050, expanding the global forest by 10 percent ?about 300 million hectares, the area of India." "Without depopulation or impoverishment, incr...

Prion disease treatable if caught early

... will not only halt clinical progression but allow reversal of early behavioral and cognitive abnormalities," wrote the scientists....

Reversing cancer cells to normal cells

...odel - where inhibiting Nodal signaling led to the reversal of the melanoma cells to a more normal cell type. This is a promising area of research, says Dr. Hendrix. The discovery of a new signalizing pathway in melanoma and other tumor cell types and the ability to inhibit Nodal and thus reverse the mela...

40,000-year-old skull shows both modern human and Neandertal traits

... humans. They could be the result of evolutionary reversal or reflect incomplete palaeontological sampling of Middle Paleolithic human diversity. "They could also reflect admixture with Neandertal populations as modern humans spread through western Eurasia. This mixture would have resulted in both archaic...

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