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Tag: "lost" at biology news

New tiger report release: Tiger habitat down from just a decade ago

...healthy tiger populations although many areas have lost tigers over the last 10 years. "As tiger range spans borders, so must tiger conservation," said Eric Dinerstein, chief scientist and vice president of conservation science at World Wildlife Fund. "Asia's economic growth should not come at the expe...

Neurons grown from embryonic stem cells restore function in paralyzed rats

...s given other combinations of treatments recovered lost function. "We found that we needed a combination ... the loss of function, we need to actually replace lost neurons." While these results are promising, much work remains before a similar strategy could be t...

How ancient whales lost their legs, got sleek and conquered the oceans

...ot fully defined. "It's clear when ancient whales lost all vestiges of the limb it was probably triggered by loss of Sonic hedgehog," said Clifford Tabin, Ph.D., a professor of genetics at Harvard Medical School who was not involved in the research. "But it's hard to say for certain because you're lookin...

Survivors of childhood polio do well decades later as they age

...sure it, it's very modest," he says. "Likely, they lost so much strength at the time of their illness that any change is very noticeable to them. Though the likelihood is high that patients who have had childhood polio will complain of weakness later in life, they can expect years of stability without the...

Spinal cord bridge bypasses injury to restore mobility

...ment, the neural bridges were severed and the rats lost all movement gained from the combination of treatments. This provides the most conclusive evidence to date that severed nerve fibers in the spinal cord can, in fact, regenerate for long distances and establish proper functional connections. Silver...

New GI technologies improve internal organ visualization

...he 24 patients, 14 (7 colonoscopy and 7 endoscopy) lost responsiveness to ARM during the procedure. One subject experienced oxygen desaturation (level of breathing and sedation) below 90 percent (low=85 percent) and seven subjects experienced apnea for less than 30 seconds. However, the device automatic...

Researchers link two more genes to sudden infant death syndrome

...for a possible explanation. For families that have lost an infant to SIDS, it would be reasonable for parents to talk with their physician to make sure there is no family history of other unexplained deaths, unexplained fainting episodes, unexplained seizures that might provide clues and prevent more deat...

Pollution threatens coral health by preventing lesions from healing, UCF study shows

...n University tracked how quickly coral regenerated lost tissue from lesions they created while collecting samples. Scientists have long been concerned about declining coral reef health off the southeastern Florida coast, in the Florida Keys and worldwide. The World Research Institute's Reefs at Risk pro...

Protein-coated dental implants could improve bone regeneration

.... The result was a nearly complete regeneration of lost tissue, says Dr. Ulf Wikesjö, a professor of perio... quest to regenerate tissues around teeth that are lost due to periodontal disease," he says. "I've looked at multiple approaches to achieve regeneration, i...

Failure of 'scout cells' may lead to cancer in transplant patients

... control by the immune system. That control can be lost in people whose immune system is suppressed to prevent rejection of a transplanted organ. The cancer, called post-transplant lymphoproliferative disorder (PTLD), arises only in some transplant patients, but doctors don't know why. This study, l...

Finding paves way for better treatment of autoimmune disease

...o of regulatory cells to non-regulatory T cells is lost in those with autoimmune disease, he says. However, too many regulatory cells also can be a problem, he says, noting that cancer patients have higher levels of regulatory cells. Regulatory T cell therapy also resolved symptoms in a model of graft v...

Scientists identify protein with a crucial role in cell death

...o convert oxygen into energy, they have apparently lost their protection against apoptosis, and so the cells die off more quickly. Therefore, PARL plays a crucial role in the cells' dying off process and, consequently, probably also in the origin of diseases of ageing, like Parkinson's disease. ...

HIV-1's high virulence might be an accident of evolution

...f evolution, new evidence reveals. A gene function lost during the course of viral evolution predisposed H.... "The findings suggest that the gene function was lost during viral evolution in a lineage that gave rise to HIV-1 and may have predisposed the simian prec...

Scientists identify gene involved in stem cell self-renewal in planaria

...anarian possesses an amazing ability to regenerate lost body parts. Chop one into pieces, and each piece can grow into a complete planarian. The flatworm relies upon a population of stem cells to accomplish this remarkable feat; recent work sheds light on how planarians maintain these stem cells throughou...

One therapeutic dose of radiation causes 30 percent spongy bone loss in mice

...e receiving just one therapeutic dose of radiation lost up to 39% of the spongy portion of their inner bone, reducing the inner bone's weight bearing connections by up to 64%, researchers reported. The study, which appears in the online edition of the Journal of Applied Physiology, has implications for pa...

A single sugar found responsible for an antibody's ability to treat inflammation

... retained its structure and its half-life, but it lost its protective abilities. "This is a very interesting condition that's set up," Ravetch says. "IgG can shift from a state that is quite inflammatory to a state that is actively anti-inflammatory by just changing a sugar." This switch occurs during a...

Parallel evolution: Proteins do it, too

...ges and found the same pattern: the new genes have lost the ability to degrade double-stranded RNA, but the older genes have kept it. "So it looks like, after gene duplication, there is a division of labor," Zhang said. "Before duplication, the gene is supposed to do both jobs: digestion and degrading do...

All the eggs in one basket

...ts, 20 percent of historic nesting sites have been lost entirely due to land development and turtle exploi...op for the turtles, and see the reestablishment of lost sites as "extremely unlikely." Their data point to hunting destroying 24 nesting sites of the two s...

Bone marrow may restore cells lost in vision diseases

...also grow new cells in the retina to replace cells lost to injury or disease. "In people, retinal pigment epithelium can become damaged with age," said Jeffrey Harris, a graduate student in the department of molecular cell biology in UF's College of Medicine and first author of the paper. "Factors like s...

Medium is the message for stem cells in search of identities

...to damaged brain environments to restore functions lost to disease or injury. "We largely keep the brain cells we are born with for life, but we also have stem cells in our brain that can divide and make new neurons for maintenance," said Gordon Fishell, Ph.D., a professor of cell biology with the Skir...

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