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Tag: "lost" at biology news

Spleen may be source of versatile stem cells

...ng function: when creatures like newtsregenerate a lost limb or tail, production of Hox11 is radicallyincreased.As reported in their SAGE KE article, the MGH team did find that Hox11was produced in the spleens of adult mice by the same cells thatregenerated the islets in the earlier study. They also found...

Researchers discover way to make cells in the eye sensitive to light

...me forms of hereditary blindnessphotoreceptors are lost entirely, but the retinal ganglion cells, thecells which signal to the brain, remain intact. The researchers believethat by activating the melanopsin, these cells may gain the ability tosense and respond to light.Professor Mark Hankins, from Imperial...

Enzyme, lost in most mammals, is shown to protect against UV-induced skin cancer

...ently repairing theselesions ?have apparently been lost from placental mammals over thecourse of evolution.Thus, most mammals, including humans, can only repair these lesionsthrough a much less direct and elaborate process called nucleotideexcision repair.In the new work, Dr. Bert van der Horst and collea...

Neuronal 'traffic jam' marks early Alzheimer's disease

...em and thus the viability of brain cells otherwise lost in Alzheimer's. The findings also could ultimately lead to distinctive markers of early Alzheimer's disease that could be used in early diagnostic tests for the disorder, they said. The research team led by Lawrence S. B. Goldstein, a Howard Hughes ...

Scientists discover the cellular roots of graying hair

... lacking this gene. In adramatic fashion, the mice lost their melanocyte stem cells shortlyafter birth and quickly went gray. It may be that people who grayprematurely have mutations that knock out Bcl2 activity, Fisher says.“This tells us there is a requirement for Bcl2 in normal hair folliclecycling,?ad...

Fundamental Finding Yields Insight into Stem Cells, Cancer; Opens Door to Drug Discovery

... lacking this gene. In adramatic fashion, the mice lost their melanocyte stem cells shortlyafter birth and quickly went gray. It may be that people who grayprematurely have mutations that knock out Bcl2 activity, Fisher says.“This tells us there is a requirement for Bcl2 in normal hair folliclecycling,?ad...

Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.

... lacking this gene. In adramatic fashion, the mice lost their melanocyte stem cells shortlyafter birth and quickly went gray. It may be that people who grayprematurely have mutations that knock out Bcl2 activity, Fisher says.“This tells us there is a requirement for Bcl2 in normal hair folliclecycling,?ad...

Experiments provide proof of how traveling in groups protects insects

...d several devices from trees and burrows. Two were lost entirely and, presumably because Mormon crickets can't fly, carried off a long way by birds and out of radio receiver range. "What this new work appears to show is that even though being part of the band has its own costs -- such as greater competit...

Experiments provide proof of how traveling in groups protects insects

...d several devices from trees and burrows. Two were lost entirely and, presumably because Mormon crickets can't fly, carried off a long way by birds and out of radio receiver range. "What this new work appears to show is that even though being part of the band has its own costs -- such as greater competit...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...other calculations, indicates ice in that area has lost only 200 to 400 meters of its thickness in the last 20,000 years, said Edwin Waddington, a UW professor of Earth and space sciences. Like water on a hillside, Siple Dome ice flows down into adjacent ice streams, where it continues to the nearby Ross...

Research Using Mouse Models Reveals A Novel Key Player In The Initiation Of Colon Cancer

...d that more than ninety per cent of the tumors had lost the normal copy of the APC gene and now were compl...ood that the second normal copy of the APC gene is lost or mutated, leading to the initiation of tumor formation. This study sets a new paradigm for gastro...

Bird Brains Show How Trial and Error May Contribute to Learning

...that birds with damage to that region of the brain lost their improvisational ability. In birds without a ... between the two types of songs, but the solo song lost its subtle variations. "In a nutshell, our paper suggests that the basal ganglia play a special rol...

TEL2 gene cooperates with MYC gene to provoke B-cell lymphomas

... said. "In fact, all TEL2/MYC B-cell lymphomas had lost their p53 function." Grosveld's team found that this sequence of events modeled in the mouse also occurs in human lymphoma patients. Combined elevated TEL2 and MYC expression occurred in the B lymphocytes of over a third of patients with a B lymphom...

South America's vast pantanal wetland may become next everglades, UNU experts warn

... interest to U.S. scientists for insights into the lost biodiversity of Florida's famed Everglades, altered by drainage projects starting in the 1940s to make way for development and agriculture. In a message to mark World Water Day, March 22, UNU says the Pantanal provides enormous environmental service...

Falling ants glide back to trunk to avoid dangers of forest floor

...to get back to the tree, they're trying to not get lost in the understory of the forest," he said. Once th...y probably evolved the ability to glide after they lost their permanent wings, which were common in primitive ants. "This discovery doesn't necessarily say...

In the migratory marathon, parasitized monarchs drop out early

...grate. Study results suggest that if migration is lost from this system, remaining populations will become heavily parasitized. More generally, this study demonstrated that seemingly small effects of parasites on their hosts could have a much larger impact when combined with the stresses of long-distance...

Vascular structure and function improve with diet and exercise

... found that the 22 female and 16 male participants lost weight and improved their exercise capacity on the program. Treadmill tests were used to measure exercise capacity (VO2 max, the maximal volume of oxygen exchanged during exercise) at the beginning and end of the eight-week period. Average VO2 max in...

Bone Density Recovers After Teens Stop Injected Contraceptive

... years old.) That study found that the older women lost bone density while using DMPA and increased bone m...wever, the younger women in the current study both lost bone density and increased bone density more rapidly than did the older women in the previous study....

Variation in women's X chromosomes may explain differences among individuals, between sexes

...s. Many genes on the male Y chromosomes have been lost over evolutionary time, leaving the chromosome with fewer than 100 functional genes. In contrast, the X chromosome -- present in at least one copy in both sexes -- encodes more than 1,000. More than 45 years ago, researchers discovered that genes on...

Biodiversity hotspots identify conservation priorities

...age of remaining habitat, with each hotspot having lost at least 70 percent of its original natural habita... the other hand, relatively little forest has been lost in the Atlantic Forest, and Madagascar looks set to hold steady following President Marc Ravalomanan...

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