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Tag: "needs" at biology news

The secret to longevity in tubeworms

...its own long-term survival. The sulfide this worm needs is created by a consortium of bacteria and archaea that live in the deep sea cold sediments surrounding the seep where the worm lives. These chemoautotrophs use energy from hydrocarbons to reduce sulfate to sulfide, which L. luymesi absorbs through i...

U-M scientist to talk about tissue engineering at AAAS

... defects, the body cannot heal itself and the body needs a jumpstart," Krebsbach said. To heal a large wound, like that created when a cancerous tumor is removed from the jaw, that often means taking a bone graft from someplace like the hip. That approach has problems both for the wound at the donor site a...

Genome-wide mouse study yields link to human leukemia

...oothold and spread. Caligiuri says much more work needs to be done, but adds that the identification of Id4 as a likely tumor suppressor gene gives clinicians another possible target for intervention. "We already have a drug, decitabine, that we know can reverse the effects of methylation," says Plass. "...

Scientists find missing enzyme for tuberculosis iron scavenging pathway

...ped, the bacterium cannot acquire the iron that it needs for survival," explains Dr. Baker. "Importantly this seems to be true even of the bacteria that are taken up by macrophages in the lung and enter a dormant state ?these are the hardest to attack with drugs." ...

Gene therapy converts dead bone graft to new, living tissue

...e splint, stripping it down in times when the body needs the calcium, and rebuilding it when calcium levels rise. The bone that is rebuilt is now fully the patient's own, as if the dead bone were a house being renovated by replacing a single brick at a time without tearing the whole structure apart. Schwa...

Placenta Is A Rich Source Of Blood Stem Cells

...nce in patient care and sensitivity to the complex needs and diversity of children and families. Children's also is the primary pediatric teaching affiliate of Harvard Medical School. For more information about the hospital visit: http://www.childrenshospital.org/research. ...

Newly Discovered Compound Blocks Known Cancer-Causing Protein

...re it can send signals for unchecked growth. "Ras needs to be at the plasma membrane in order to function," he said. "By preventing Icmt from adding a methyl group, we can effectively shut down Ras' ability to function, stopping it from sending signals for uncontrolled growth." Initial experiments showed...

Scientists identify new model Of NK cell development

... cell development, but we also know that more work needs to be done to fill in some gaps." Still, the findings appear to offer important new information about NK killer cells that may ultimately be helpful in designing more effective treatments for cancer and other diseases says Caligiuri. "NK cells are ...

Antibiotic might fight HIV-induced neurological problems

...f the physicians planning the clinical trial. "One needs to proceed with a clinical research trial first to prove its safety and efficacy against HIV-associated cognitive impairment." SIV and HIV both affect the same tissues in the same way and use the same tricks to infect cells and outwit treatments, bu...

Protein offers way to stop microscopic parasites in their tracks

... any rotating object -- be it a belt or a wheel -- needs traction, or the ability to grip onto something and push against that grip. Car wheels, for example, are sometimes given added traction in wintertime via the addition of chains. The parasite supplies its moving belt with traction by putting spots of...

Hirsute Or Hairless? Two Proteins May Spell The Difference

... than a ridge of fur down the midback and tail—and needs special care to thrive as a pet. Hairless animals in the lab, on the other hand, can be very instructive. Understanding how hair develops sheds light on the fundamental processes that generate a wide range of tissues and organs, including the lungs, ...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...over. The rover uses solar energy to operate so it needs to travel during daylight hours. Many times, the images we capture may only reveal a faint signal. Any sunlight that leaks in to the camera of a conventional fluorescence imager would obscure the signal," said Waggoner. "To avoid this problem, we de...

Reducing malarial transmission in Africa

...fficulty taking a six-dose regimen, and as it also needs oily food for adequate absorption there might be inadequate drug levels in the blood of many treated individuals. The authors conclude that although co-artemether as a first-line treatment is not likely to reduce overall transmission of Plasmodium fa...

Researchers identify protein crucial for survival of Lyme-disease bacterium

...g the bacterium, because if you understand what it needs to sustain itself, then in theory you could disrupt that cycle by blocking whatever that mechanism is," Dr. Norgard said. Traditionally, scientists studying pathogens have looked at genes that affect how the infecting organisms behave once inside a ...

Gene therapy promising for growing tooth-supporting bone

...han simply implanting a new one---the patient also needs the bone structure to anchor the new tooth in place. Such reconstructive surgery today involves either taking a bone graft from the patient's chin or jaw, which leaves a second wound needing to heal, or using donated bone from a tissue bank, which yi...

Gray wolves maintain the food chain in winter

...ntermittent food supplies that no longer track the needs of local scavengers. With or without wolves, late-winter carrion abundance will decline with shorter winters. But wolf kills buffer these shortages, providing meals that could determine whether scavengers will be able to survive and reproduce. It se...

Harmful chemicals may reprogram gene response to estrogen

...chemical exposures. Walker believes more research needs to be done to test this concept in people. "NIEHS is partnering with the National Academy of Sciences to fund additional research on early-life exposures and cancer risk in human populations," she said. ...

Cerebral navigation: How do nerve fibers know what direction to grow in?

...n and possibly Vav," he speculates, "but much more needs to be known about how ephexin, Vav and other proteins work together to coordinate axon guidance." ...

Biochemists report discovery of structure of major piece of telomerase; implications for cancer

...sease mutations." For telomerase to be active, it needs the telomerase RNA and a protein called human telomerase reverse transcriptase, which is related to the reverse transcriptase protein that is important for replicating the AIDS virus. Feigon's laboratory has been working on the RNA. "It is a dream o...

Study reveals dramatic difference between breast cancers in US and Africa

... disease and die from it in their 40s, and it also needs to be adjusted in African Americans and high-risk women in all racial/ethnic groups." Olopade is one of four principal investigators in a large-scale, multi-year, cross-disciplinary effort based at the University of Chicago to sort out the genetic a...

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