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Tag: "leave" at biology news

HIV exploits competition among T-cells

...s for T cells produced in a lymph node to begin to leave it, the possibility exists to set up simultaneous, independent competition against each of the multiple strains that will evolve by injecting each strain simultaneously so that they drain to different lymph nodes. In this case, no single T cell is ch...

Vaccine for brain tumors shows promising results

...aring this fingerprint. The vaccine is intended to leave healthy tissue unaffected and limit the debilitating side effects typically associated with traditional cancer treatments such as chemotherapy and radiation therapy. Vitespen has been granted fast track and orphan drug designations from the Food and ...

'Empty nester' parent birds use recruitment calls to extend offspring care

...t is usually assumed that care ends when the young leave the nest and begin to forage for themselves. In many species, however, parents and young continue to associate with one another beyond this point of nutritional independence. Because juveniles are poor foragers, they might benefit from staying close ...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...y half of all dinosaur genera that existed did not leave behind fossils that could be found. "I would never suggest that this prediction, however statistically sound, is the final word on dinosaur diversity," Dodson said. "My intention is to fuel the discussion using the facts at hand, and this is the bes...

Weighty viruses

...d in an electric field. However, this process must leave the viruses intact. The researchers thus chose to use a very gentle method known as LIAD (laser-induced acoustic desorption). The virus particles are released from the sample by laser-induced sound waves. They are then caught in an “ion trap? This is...

Lost in the labyrinth

... cells take decisions about their fate before they leave the stem cell compartment in the bone marrow, something so far not thought to occur. The study proves that beta-catenin plays a central role in determining whether blood cells form or not. On the other hand, an overactive Wingless pathway doesn't se...

Math model predicts cancer behavior

...h create a harsh microenvironment in the tumor may leave behind the most aggressive and invasive tumor cells. "In the immediate term we may be diminishing tumor burden, but the long term effect is to have a much nastier tumor than there was to begin with," Quaranta said. There is anecdotal evidence, he a...

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

...elta protein, they cease to be stem cells and soon leave the niche. The researchers also found that the receiving end for the Notch pathway, the trigger, is required in the niche cells, making them receivers of signals, not just senders. Work by other scientists had shown that TCF-beta signaling from niche...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

... and other parts of the enzyme. Those interactions leave another side chain in the trigger loop precisely positioned, such that it may literally “trigger?the formation of the chemical bonds that link components of the growing RNA chain together. If the NTP is even slightly misaligned, Kornberg said, those ...

Why do cold animals make bigger babies?

... of these organisms, we expect temperature to also leave an imprint on reproduction." ...

U of M researchers invent 'flashy' new process to turn soy oil, glucose into hydrogen

...mokes and turns brown, sugar turns black, and both leave a nasty film of carbon on the cookware. Now, a University of Minnesota team has invented a "reactive flash volatilization process" that heats oil and sugar about a million times faster than you can in your kitchen and produces hydrogen and carbon mon...

Brain works more chaotically than previously thought

...lin," says Dirk Dietrich. As soon as the axons leave the white "cable duct" they enter the brain's grey matter where they encounter their receptor dendrites. Here, the information is passed on at the synapses to the receptor cells. "We think, however, that on their way though the grey matter the axons ...

UCLA: How does your brain respond when you think about gambling or taking risks?

Should you leave your comfortable job for one that pays better but ...oman in a bad marriage, Tom said, is not likely to leave unless she has prospects that are much better than what she has. "She's probably not going to lea...

Study finds mercury prevalent in many western fish

...ubtle. They may not clean their young, or they may leave eggs unattended in their nests. "We simply haven't done enough studies to know all of the impacts, especially on fish-eating animals," Hughes added. The study, based on data collected from EPA's Environmental Monitoring and Assessment Program, e...

Trojan horse strategy defeats drug-resistant bacteria

...this approach is promising, and we can't afford to leave any stone unturned."...

Researchers urge monitoring of bone health during chemotherapy

...white blood cells. Low levels of white blood cells leave patients susceptible to infection. "This growth factor encourages bone breakdown, and any therapy that decreases bone density could potentially enhance tumor growth in bone," says senior author Katherine Weilbaecher, M.D., assistant professor of m...

UCSF brain tumor vaccine trial shows promising results

...aring this fingerprint. The vaccine is intended to leave healthy tissue unaffected and limit the debilitating side effects typically associated with traditional cancer treatments such as chemotherapy and radiation therapy. Vitespen has been granted fast-track and orphan drug designations from the Food and ...

Why doesn't the immune system attack the small intestine?

...ode cells that instruct key immune system cells to leave healthy tissue alone. The finding, which illuminates a previously unknown corner of the human immune system, may lead to new forms of treatment for autoimmune diseases such as Type 1 diabetes and multiple sclerosis. "We've discovered that cells not...

Cancer-killing invention also harvests stem cells

...adhesive mechanism by which bone marrow stem cells leave the bloodstream and find their way back into bone marrow. This is how bone marrow transplantation works. Finally, he learned that when a cancer cell breaks free of a primary tumor and enters circulation, it flow through the bloodstream to a remote ...

Paper challenges 1491 Amazonian population theories

...landscapes where people lived, and asked, did they leave their homesite to farm around other nearby lakes? No they didn't. These findings argue for a very localized use of Amazonian forest resources outside the main, known, archaeological areas." Bush says the evidence comes from a geographically divers...

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