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Tag: "replenish" at biology news

Loss of stem cells correlates with premature aging in animal study

..., their progeny can rapidly divide and are able to replenish the tissue with new cells. Brown explains that in the current study the mouse cells without ATR had an overwhelming amount of DNA damage and could not contribute to tissue renewal; nevertheless, the 10 to 20 percent of cells that escaped ATR dele...

Penn researchers replace organ in adult mice using 'single-parent' stem cells

...ess of parent of origin, were able to functionally replenish the entire blood-producing system of adult mice. The scientists were able to maintain animals for more than 12 months with entirely uniparental blood and were able to rescue other irradiated mice with bone marrow transplants from these animals....

Long-lived deep-sea fishes imperiled by technology, overfishing

...y, so there are no quick-fix remedies available to replenish the population, said Selina Heppell, a fisheries b...eplant' the fish. We have to depend on the fish to replenish themselves. And the habitat that used to provide them protection ?the deep ocean ?is now accessible ...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

... scallop population to support a fishery and still replenish itself each year. In contrast, sampling by Peterson and co-author Sean Powers in recent years—after the cownose ray population explosion—showed that the migrating rays consumed nearly all adult bay scallops in the area, except those protected inside ...

Research project tackles 'regeneration' gap

...hat some tissues have a far more robust ability to replenish and replace cells than others. Yet we do not understand the bases for these differences." The Regeneration Project will shortly begin establishing its think tank of international scientists, Steindler said....

Stem cells engage in dialogue with the cells that regulate their futures

...so on. Niches are places where your stem cells can replenish themselves and your tissue cells throughout your l...elf-renewing division," she explained, "stem cells replenish the stem cell pool. They also produce progeny that change into other, specialized cells. Importantly...

Chemical tests of cell growth enter third dimension

... for up to two weeks without researchers having to replenish the growth medium. "If you replenish the medium, you could essentially grow cells indefinitely," Yang said. The second new technology to...

Wild tigers need cat food

...The good news is that given the chance, tigers can replenish their numbers; the bad news is that they are not being given that chance in many parts of their range," said WCS’s noted big-cat researcher Dr. Alan Rabinowitz. Earlier this year, WCS launched a new program called "Tigers Forever" that pledges a...

Commercial fishing causes dangerous fluctuations in fish populations

...ons vulnerable because if they rely on recruits to replenish their numbers, there is always the danger that some kind of environmental factor will devastate the recruits in one season. This would leave the population close to collapse, with very few young fish coming into the group to replace those being caugh...

AIDS-related cognitive impairment exists in two separate forms

...m of each crypt. The job of these stem cells is to replenish the entire lining of the colon that turns over every five days. However, a mutation in these stem cells produces mutant daughter cells, disorganized tissue architecture, and increased proliferation of crypt cells, which leads to development of colon ...

Markers of gene, protein, or micro-RNA activity predict outcome in prostate and colorectal cancers

...m of each crypt. The job of these stem cells is to replenish the entire lining of the colon that turns over every five days. However, a mutation in these stem cells produces mutant daughter cells, disorganized tissue architecture, and increased proliferation of crypt cells, which leads to development of colon ...

St. Jude projects 90 percent cure rate for ALL

...ial treatment (induction therapy). These cells can replenish the population of leukemic cells and cause the patient to relapse. Using highly sensitive techniques, St. Jude researchers developed a technique for identifying abnormal combinations of proteins that appear only on the surface of leukemic cells. Thi...

Tiny polyps gorge themselves to survive coral bleaching

... while Montipora had somehow managed to completely replenish them. To explain that, Grottoli and colleagues c...llowing it not only to survive and repair but also replenish its internal energy reserves. "We think that this means that coral like Montipora can switch how i...

A little telomerase isn't enough

... time, bringing an early demise to stem cells that replenish the blood supply, immune system and intestine, the...with the condition, stem cells in bone marrow that replenish the blood cells and those in the digestive system that maintain the intestines can't divide as many ...

UQ researcher tracking key to healing the brain

...dy, they can theoretically divide without limit to replenish cells lost due to everyday wear and tear, or following injury or disease. Dr Rod Rietze, head of the Queensland Brain Institute's (QBI) Laboratory for Neural Stem Cell Biology, is hoping those stem cells may soon unlock the secrets to healing the b...

AACR Favors 'full spectrum of stem cell research biology'

...s precursors to the differentiated cells needed to replenish damaged tissue. In light of the recent cloning of patient-specific human embryonic stem cells by researchers in South Korea, AACR Science Policy and Legislative Affairs Committee Chairman William G. Nelson V, M.D., Ph.D., pointed to the clause in th...

Discovery Promises Simpler Therapy for Sickle Cell Disease

... In patients who become anemic, blood transfusions replenish the red blood cell supply in the body. The team further found that differences among patients in their ability to process nitric oxide in the blood correspond to the severity of their disease symptoms. That result might explain a long-standing puzzl...

Gene therapy for Parkinson's disease moves forward in animals

...tandard of current treatment, enables the brain to replenish its dwindling supply of dopamine, sidetracking the destructive course of Parkinson's disease. But eventually the treatment can backfire. "Levodopa generally works great for several years, but then it actually starts creating movement problems," Mand...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...tandard of current treatment, enables the brain to replenish its dwindling supply of dopamine, sidetracking the destructive course of Parkinson's disease. But eventually the treatment can backfire. “Levodopa generally works great for several years, but then it actually starts creating movement problems,?Mande...

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