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Tag: "observed" at biology news

Engineered skin offers clues to melanoma development

...at was grafted onto laboratory mice. The mice were observed for up to six months and sacrificed at different t...ogressed to ulcerated tumor nodules. Melanoma was observed as early as one month after the oncogenic combination was introduced. The tumors demonstrated aggres...

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

...his data provides solid biological support for the observed clinical improvements. Twelve subjects in total have undergone gene transfer, four in each of three dose cohorts. Seven of the eight patients representing the low and mid-dose cohorts have now been evaluated one year following treatment. Three of ...

Ibruprofen and other commonly used painkillers for treating inflammation may increase the risk of heart attack

...at was grafted onto laboratory mice. The mice were observed for up to six months and sacrificed at different t...ogressed to ulcerated tumor nodules. Melanoma was observed as early as one month after the oncogenic combination was introduced. The tumors demonstrated aggres...

Researchers use RNAi libraries to identify regulators of apoptosis and chemoresistance

...at was grafted onto laboratory mice. The mice were observed for up to six months and sacrificed at different t...ogressed to ulcerated tumor nodules. Melanoma was observed as early as one month after the oncogenic combination was introduced. The tumors demonstrated aggres...

'Sinkers' provide missing piece in deep-sea puzzle

... organisms that might make up for the lack of food observed in sediment traps. Some researchers have theorized...nize the mucus. MBARI scientist Bruce Robison had observed hundreds of these cast-off larvacean houses (commonly known as "sinkers") while exploring the waters...

Bird samples from Mongolia confirmed as H5N1 avian flu

... 6,500 apparently healthy birds of 55 species were observed on the lake. The percentage of sick or dead birds was miniscule according to Gilbert following the survey, suggesting that either the virus had little effect on the birds or that very few were actually infected by the bug. Early results suggest th...

Otter adaptations: How do otters remain sleek and warm

...ation of the otter's coat. Indeed, biologists have observed otters actively blowing air bubbles into their fur while grooming, and their energetic rolling catches air in their fur. "The air insulates like a down jacket," explains Weisel. A common otter behavior, next to their playfulness, is their constant g...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

... of northern Alaska is equivalent to what might be observed if there was a doubling of carbon dioxide in the a...n the summer or to an increase in cloud cover. The observed summer temperature increases are likely related to a global warming trend that has led to a longer s...

Genome Sequence for Haemophilus Influenzae Completed

...ation of the otter's coat. Indeed, biologists have observed otters actively blowing air bubbles into their fur while grooming, and their energetic rolling catches air in their fur. "The air insulates like a down jacket," explains Weisel. A common otter behavior, next to their playfulness, is their constant g...

Simple sea sponge helps scientists understand tissue rejection

... happens in human transplants--the scientists have observed that cells known as gray cells migrate to and amass at the graft site, a clear suggestion that they are involved in non-self tissue recognition and rejection. Researchers believe that gray cells may be a primitive form of our immune system's human ki...

Can two killers make a cure?

...mehow merge, but such recombination has never been observed in HIV. Despite his confidence that the hybrid will be safe, Pickles has abandoned similar research as he fears opposition from a fearful public will prevent the method ever being used. Another problem with Kobinger's approach is that patients will ...

Unweaving amyloid fibers to solve prion puzzles

...d humans.," says Lindquist. That gap has also been observed between other species, she notes: "In fact, some type of prions from infected hamsters can't make the species jump into mice, while others do, and vice versa." While the results of this research are clearly of interest to scientists investigating co...

Muscle repair: Making a good system better, faster; implications for aging, disease

...nic transcription factor MyoD. "In other words, we observed accelerated repair over and above what is already a naturally efficient system," lead author Timothy J. Koh of UIC said later. The study, entitled "Mice deficient in plasminogen activator inhibitor-1 have improved skeletal muscle regeneration," appe...

Gene loss accelerates aging

... reached maturity. The effects of premature aging observed in these p63 deficient mice (image available on request) were hair loss, reduced fitness and body weight, progressive curvature of the spine, and a shortened lifespan. "Aging and cancer are two sides of the same coin. In one case, cells stop dividin...

Helping in a selfish world

...they are related to the dominant breeders, we also observed that other unrelated helpers work as a kind of rent payment," says Stiver. Like in a commune or a kibbutz where non-relatives work together to achieve a common goal, these helper fish donate their time and energy to the group in exchange for the saf...

Traditional models underestimate extinction rates

...y-dependence was included did the models match the observed extinction rates in the flea experiments. When density dependence was not included, extinction rates were greatly underestimated. Drake's results underscore the importance of bolstering extinction models with empirical validation--and of accounting ...

Scientists uncover new clues about brain function in human behavior

...t was in healthy controls. Instead, the scientists observed increased activity and linkage in the medial region, which is consistent with the high level of empathy exhibited by people with Williams Syndrome. "We had previously seen that the orbitofrontal cortex is structurally abnormal in Williams Syndrome, ...

Researchers discover how malaria parasite disperses from red blood cells

...taining vacuoles. Again, however, the researchers observed that this theory also offered an inaccurate picture, as the vacuoles ruptured at roughly the same time as the cell membrane. Each step in the release process is a potential avenue for new therapies to treat the disease, Dr. Zimmerberg said. By firs...

Global warming increases oyster sensitivity to pollution

...ure changes with environmental temperature. Lannig observed that cadmium levels increased the basic metabolic rate (BMR) of oysters at 20ºC and 24º. For oysters at 28ºC, cadmium did not increase the BMR, but it significantly reduces its chances of survival. "One possible mechanism for this observation is incr...

Virtual animal shelters ?How the Internet is transforming the experience of pet adoptions

...as well as pet rescue volunteers. Furthermore, she observed eight animal adoption events sponsored by animal rescue organizations and recalled her own experience of adopting a dog from an animal shelter. "Because the rescue members and volunteers can easily communicate with each other, coordinate their effor...

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