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Tag: "been" at biology news

A gene's first 'kiss' sets off that affair known as puberty

...ademy of Sciences (PNAS). Until now, little had been known about what instigates the cascade of hormone... how and when the brain activates this process has been a great mystery. An appreciation of puberty's deep-seated neurobiological mechanisms could, for inst...

Chemists create 'Superbowl' molecule; May lead to better health

.... Over the years, these bowl-shaped molecules have been extensively studied and refined by chemists for th...t cautions that the superbowl molecule has not yet been tested in animals or humans. Until then, no one knows yet when this experimental molecule will actua...

DNA Molecules Used To Assemble Nanoparticles

...," Choi said. But now that the assembly system has been worked out, other forms of dendrimer clusters are in the works. "If you wanted to make a therapeutic that targeted five drugs to five different cells, it would be 25 synthesis steps the traditional way," Baker said. At two to three months per synthe...

Bioartificial kidney under study at MCG

...s a better option, but, in fact, the issue has not been scientifically analyzed. This month, Dr. Szerlip and MCG Medical Center will join a Department of Veterans Affairs and National Institutes of Health study to do just that. But no matter how long dialysis is given, it only replicates a fraction of th...

Viral DNA sequence a possible trigger for breast cancer

...liferation of the cells. These sequences have also been found in proteins from some other cancer-causing v...uced breast cell transformation, which has largely been attributed to the integration of viral DNA into locations that trigger the expression of host cancer...

Wisconsin scientists grow critical nerve cells

...ates such as mice, whose embryonic stem cells have been available to scientists for decades. One reason scientists have had difficulty making motor neurons, Zhang believes, may be that they are one of the earliest neural structures to emerge in a developing embryo. With the ticking clock of development i...

New push for public health, AIDS spending at African Union summit

...the continent. Generic versions of the drugs have been priced at roughly $US300 a year, the costs for which the WHO hopes will be offset by national resources, international agencies and private or government donations. Efforts to provide low-cost drugs to African HIV sufferers received a major boost th...

Man and mouse share genome structures

...005 issue of Cell. "Now that the human genome has been sequenced, it is vital to learn how the genome is ...le portions of the mouse genome. Until now, they'd been missed by more standard genome analysis tools. Most exciting to Bernstein is the unusual density of...

A new mechanism of regulating RNA degradation

...t, even though its presence in mammalian cells has been recognized for several years. "We were surprised ...whole new function for Staufen1 that couldn't have been predicted from the studies in flies, even though a similar function may occur in flies." The team d...

FDA Approves Human Hookworm Vaccine for Phase I Safety Trials

...t, even though its presence in mammalian cells has been recognized for several years. "We were surprised ...whole new function for Staufen1 that couldn't have been predicted from the studies in flies, even though a similar function may occur in flies." The team d...

Deficient DNA Repair Capacity Associated With Increased Risk Of Breast Cancer

...aken from pairs of sisters in which one sister had been diagnosed with breast cancer and the other had not. They found that DNA repair capacity was lower in breast cancer patients than in the control subjects. Deficient DNA repair capacity was associated with a twofold increase in the risk of breast canc...

Spleen may be source of versatile stem cells

...elp with many more biologicalemergencies. What has been considered a practically unnecessary organmay actually provide critical healing cells," says Faustman, anassociate professor of Medicine at Harvard Medical School.She adds, "This data also shows the kind of payback that can come fromstudies of lower ...

Genes In The Interferon System Important In Systemic Lupus Erythematosus

...he disease systemic lupus erythematosus (SLE) have been identified bya team of scientists headed by resear...n thepharmaceutical industry. This picture has now been further reinforcedby new findings­ - the result of multidisciplinary and internationalcollaboration ...

UCSB scientists probe sea floor venting to gain understanding of early life on Earth

...fluid discharge into the Earth's oceans, which has been occurring ever since the oceans first formed four billion years ago. Conditions below the sea floor may most closely mimic the environment when life began. "There is a great deal of interest in the microbes of the Earth's crust because the strategie...

UAB scientists discover the origin of a mysterious physical force

Ever since the 1970s, scientists have been trying to establish the cause of a repulsive force...n thin films form in detergents. The discovery has been published in today's edition of Physical Review Letters. Water is the solvent in which most physica...

Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants

...This is the very first time that Quantum Dots have been utilized forlive imaging in plant systems. The study opens the door for thepotential use of Quantum Dots in live imaging of plant cells andprovides valuable understanding of the mechanism of interaction betweenthe pollen tube and female tissue during...

Source of molecular triggers in cutaneous T cell lymphoma identified

...immune system. Finding CTCL triggering factors has been a major goal of Richard L. Edelson, M.D., Director of the Yale Cancer Center, and professor and chair of dermatology at Yale, since he and his colleagues at the National Cancer Institute first identified CTCL as a separate category of lymphoma thirty...

University of Manchester makes made-to-measure skin and bones a reality using inkjet printers

...at infusethe cells into the structure after it has been built."The problem is getting cells into the interior of these constructionsas they naturally stick to the sides of whatever they are beinginserted into. If they stick to the sides then this limits the numberof cells which can grow into tissues, and ...

Enzyme, lost in most mammals, is shown to protect against UV-induced skin cancer

...fficiently repairing theselesions ?have apparently been lost from placental mammals over thecourse of evolution.Thus, most mammals, including humans, can only repair these lesionsthrough a much less direct and elaborate process called nucleotideexcision repair.In the new work, Dr. Bert van der Horst and c...

W.M. Keck Foundation funds study of friendly microbes

...crobial communities, in health and in disease, has been hampered because the majority of gut bacteria are difficult or impossible to grow and study outside of the intestine. With the support provided by the Keck Foundation, the researchers will create new techniques for harvesting microbial communities al...

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