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Tag: "not" at biology news

Researchers discover 'acquired' DNA key to certain bacterial infection

... way to get inside the cells and it takes control, not the phagocyte.” Phagocytes are cells that engul...s initial immune response. The researchers did not find a similar island of acquired genetic material in two similar bacteria, Mycobacterium tuberculos...

Fat fish put obesity on the hook

...any diseases and health conditions, including, but not limited to: hypertension, dyslipidemia, type 2 diabetes, coronary heart disease, stroke, gallbladder disease, osteoarthritis, sleep apnea and respiratory problems, and some types of cancer. ...

How 'memory' T cells curb the spread of viruses throughout the body

...Science Online Early Edition shows lymph nodes are not just organs where immune cells reside and prolifer...arted to multiply.” Thus, memory CD8 T cells do not prevent infection; but prevent disease partly because they curb the spread of the virus from the lym...

Human genetic 'deserts' are teeming with significant life

... human chromosomes. “I will be surprised if we do not find the same kind of variety in these structures”, he says. “Our work has shown that the human genome is far more complex than anyone could have imagined, even ten years ago. Understanding these complexities is essential to the development of ef...

Researchers identify protein pathway involved in Parkinson disease development

...he brain's motor cortex. Although scientists have not known the exact cause of the loss of these dopamine-producing neurons, they believe it is related to dysfunctional mitochondria and oxidative stress. Mitochondria are the cell's "power plants," which metabolize oxygen and generate energy. Oxidative ...

Prey not hard-wired to fear predators

...-browsed vegetation used by these migrants. “It is not just changes in climate or disease may alter our b...f predators, the elk, moose, bison and caribou did not show the kind of vigilance, clustering behavior and flight observed in the same species living with ...

CU study reveals why starling females cheat

...eir brood's genetic diversity, even though it does not reap additional help. As yet, it is unknown how fe...k down the reasons why superb starling females are not faithful to their mates and see that they have different extra-pair mating strategies," said Rubenst...

Electric fish conduct electric duets in aquatic courtship

...battle of the sexes, African electric fish couples not only use specific electrical signals to court but also engage in a sort of dueling "electric duet." The study is the first to compare electrical and behavioral displays in breeding and nonbreeding Brienomyrus brachyistius, a type of mormyrid electri...

Surprising origin of cell's internal highways

... "I've seen that there are lots of microtubules not attached to the centrosome," said Kaverina, assist...e to the centrosome," said Kaverina. "So if you're not looking at it precisely, it is hard to distinguish between the centrosome and Golgi." To get a c...

Helping chlorine-eating bacteria clean up toxic waste

...D. ethenogenes strains work well at some sites and not so well at others, and nobody knows for sure why. ...," she said. "Ithaca has three or four, and that's not atypical."...

Male circumcision overstated as prevention tool against AIDS

...n and western Africa, but this lower prevalence is not due to higher numbers of circumscribed males in th...story of polygamy in these Muslim communities does not appear to contribute to hi gher AIDS prevalence as previously speculated. In a frequently cited acad...

Gene therapy study shows safety and statistically significant improvement in Parkinson's disease

...e study. “This ground-breaking study represents not only an encouraging first step in the development ...nced Parkinson’s disease. The Phase 1 study was not specifically designed to assess efficacy. Nonetheless, the researchers reported the clinical outcome...

Revealed -- Mosquito genes that could be controlling the spread of killer viruses

... us realise that the immune systems of insects are not static but evolve and differentiate rapidly, most likely in response to the different pathogens which each insect species encounters”, says Dr Christophides. Professor Fotis Kafatos, senior researcher of Imperial’s immunogenomics lab and co-author...

Ancient retrovirus sheds light on modern pandemic

... a battle that humans have already won. Humans are not susceptible to it and have probably been resistant... millions of years ago, the antiviral protein does not seem to be good at defending against any of the retroviruses that currently infect humans, such as H...

Scientists close in on missing carbon sink

...rowing trees and other plants take in the gas, and not enough carbon dioxide up in the winter. As a resul...ew analysis of aircraft samples shows that this is not the case. "With this new information from aircraft samples we see that the models were overestima...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...ancient Alaskan wolves differed from modern wolves not only in their genes, but also in their skulls and teeth, which were robust and more adapted for forceful bites and shearing flesh than are those of modern wolves. They also showed a higher incidence of broken teeth than living wolves. “Taken toge...

AAAS decries latest stem cell veto

...rict ethical guidelines. The Executive Order is not a substitute for the Stem Cell Research Enhancemen...ict ethical guidelines. "The Executive Order is not a substitute for the Stem Cell Research Enhancement Act. The new approaches addressed by the order a...

Putting feelings into words produces therapeutic effects in the brain

...sing emotions, but exactly what it contributes has not been known. “What we’re suggesting is when you ...rocess like labeling emotions.” Many people are not likely to realize why putting their feelings into words is helpful. “If you ask people who are re...

Modified mushrooms may yield human drugs

...taking a gene, as for example a drug gene, that is not part of the mushroom, and camouflaging it with reg...maine said. A mushroom-based biofactory also would not require expensive infrastructure set up by major drug companies, he added....

New vaccine prevents CMV infection and disease in mice

... We found a way to teach the host immune system to not be tricked by the virus.” She added that the next...he United States, can remain dormant for years, if not the lifetime, of a healthy individual. However, two percent of all children are born with the virus...

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