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Tag: "mark" at biology news

UCLA researchers develop T-cells from human embryonic stem cells

...body's main defenses against disease. The results mark the first time that scientists have been able to derive T-cells out of human embryonic stem cells, said Zoran Galic, assistant research biologist, and lead researcher on the study. "This tells you that you may be able to use human embryonic stem cel...

Bird brains shrink from exposure to contaminants

... is extremely important in attracting a mate or to mark out a territory. "The issue is not that DDT is killing these robins but if they are growing up in this one area and then move to another, they won't be able to attract any females." These effects were most prominent in the males, some of which ex...

Study reveals how cells destroy faulty proteins in cystic fibrosis

...ins, decide if they might be toxic to the cell and mark them with ubiquitin. The ubiquitinated proteins, including faulty CFTR, are then degraded or shredded by the proteasome," Cyr said. "Understanding this pathway gives us greater insight into what's wrong with the protein -- information that will he...

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

...stakeholders. "This report documents a low-water mark for tigers, and charts a way forward to reverse the tide," said John Robinson of the Wildlife Conservation Society. "We can save tigers forever. However, tiger conservation requires commitment from local partners, governments and international donors...

Researchers win money to develop breath test to detect breast cancer

...d certain molecules, called metabolites that could mark breast cancer, are present in breath and urine. "We realized that if one could put these molecules in a screening platform, they might develop a non-invasive, quick and inexpensive over-the-counter breast cancer screening test," Lahann said. ...

Salk researchers make fast strides towards understanding how our body controls walking

...our leg muscles contract and relax. Their findings mark an important milestone in understanding the neural circuitry that coordinates walking movements - one of the main obstacles in developing new treatments for spinal cord injuries. "Knowing which circuits are important and understanding how they contr...

Dogs keep dying: Many owners unaware of toxic dog food

...y sad holiday and one that will leave an indelible mark on the owners that lost their cherished family members." Of those 17 dogs, Center euthanized 12 when it became clear they could not survive; five are still being treated. Dogs that have survived had consumed a smaller amount of the food than dogs th...

Botox could help target resistant tumors for treatment

...ery of chemotherapies and radiation. The findings mark a relatively new area of cancer research, which focuses on briefly opening blood vessels that feed tumor cells in order to better deliver therapeutic agents. Until recently, much cancer research has focused on the opposite: reduction of blood vessel ...

Web model of influenza-host lifecycles will aid scientists in creating anti-viral drugs

...onent and a simultaneous HIV database going online mark the first time Reactome has displayed interactions between an infectious pathogen and its host, Dr. Scheuermann said. Pathogens such as influenza have evolved to use hosts to promote their growth, while at the same time blocking the host reactions t...

Scientists directly view immune cells interacting to avert autoimmunity

...omplished. The scientists used fluorescent dye to mark different types of cells so they could directly observe the interactions of the key cell types involved in initiating autoimmune attacks and the control of their actions by therapeutic regulatory T cells. The "nonobese diabetic" (nob) mouse model us...

Researchers use 'trickery' to create immune response against melanoma

... modalities are far from adequate." These results mark the first ever example of targeted drug delivery using nanoparticle-aptamer bioconjugates. Significantly, the drug delivery was highly specific. Uptake of particles was not seen to be enhanced in cells which did not express the PSMA protein, indicati...

Targeted drug delivery achieved with nanoparticle-aptamer bioconjugates

... modalities are far from adequate." These results mark the first ever example of targeted drug delivery using nanoparticle-aptamer bioconjugates. Significantly, the drug delivery was highly specific. Uptake of particles was not seen to be enhanced in cells which did not express the PSMA protein, indicati...

The brain is broadly wired for reproduction

...d neurons, and green fluorescent protein (GFP), to mark the producing cells. By visualizing the locations of BL, GFP, and GnRH neurons and their axons, the researchers were able to identify neurons directly connected to GnRH neurons. They also determined which neurons sent signals to GnRH neurons and whic...

Neurons generated in the adult brain learn to respond to novel stimuli

... of mice whose precursor cells had been labeled to mark those that were dividing, allowing identification of newly generated, adult-born neurons. These mice were then exposed either to a panel of unusual odors or to a normal environment. Several weeks later, the response of the adult-born neurons was eva...

Scientists unpick genetics of first 15 minutes of life

...e researchers believe that this process leaves its mark in the genome of the newly-formed organism. This genetic marker could be a useful way of tracking the genetic material an offspring inherits from either their father or mother. ...

Research casts doubt on circulating stem cells

...ir impact is, at best, minimal. The somatic cells mark genetic traits believe by the body to be no longer needed by sticking a label on them ?a sort of molecular "Don't use!" sign. "We have tried to remove this label by chemical means, too, in an effort to get the nuclei of the bone marrow-derived cells ...

New NIAID grants strengthen national biodefense and emerging infectious diseases research network

...vine, and Colorado State University (Fort Collins) mark the completion of a national network of academic centers that conducts research to counter threats from bioterror agents and emerging infectious diseases. Each institution will receive approximately $10 million per year for the next four years to hea...

Protein structure key for AIDS, cell function

...ed in the journal Structure (Vol. 13, Sept. 2005), mark a major step toward designing drugs that could inhibit processes related to certain diseases. Knowing the protein's structure also opens the door to understanding CD38's many functions related to key biological processes about which researchers know ...

Neanderthal teeth grew no faster than comparable modern humans'

...are microscopic lines on the outside of teeth that mark the incremental growth of enamel on a young tooth. Like tree rings that can gauge the age of a redwood, these striations ?called perikymata ?record new growth on the surface of the tooth. Researchers know from earlier work that these markings are p...

Hopkins scientists uncover 'tags' that force proteins to cell surface

... particular tag and its closest relatives actually mark normal proteins for delivery to the cell surface," says Li. "In some diseases, a protein that should be on the cell surface isn't, and in the lab, sometimes it's proven impossible to get a protein to the cell surface in order to study it. The tags we...

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