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Tag: "rise" at biology news

Stem cell activity deciphered in the aging brain

...s are immature cells that have the ability to give rise to all types of nerve cells in the brain. In the current study, however, the researchers found that the stem cells in aging brains are not reduced in number, but instead they divide less frequently, resulting in dramatic reductions in the addition ...

A new male-specific gene in algae unveils an origin of male and female

...ve shed light on one route by which evolution gave rise to reproduction though the joining of distinct sperm and egg cells. The findings, which indicate that a gene underlying a more primitive system of reproduction was likely co-opted during evolution to participate in sex-specific sperm development, are...

More kidney cancer is detected and treated early, yet death rate rises

...tudy period (1983 to 2002), researchers observed a rise in the occurrence of kidney cancer (also known as ... considered curable by surgery, which has led to a rise in surgery for kidney cancer. Even as early detection and surgical treatment increased, however, m...

Three-dimensional, miniature endoscope opens new diagnostic possibilities

...enefit from this tool. Eventually, SEE could give rise to new procedures that permit diagnosis and microsurgery in previously inaccessible areas of the body." ...

Pilot study successful in taming allergic reactions to food

...ren under age 5, and its incidence has been on the rise over the past 15 years, according to Burks. Studies have shown that about 20 percent of children with egg or milk allergy will go on to develop a peanut allergy. ...

Plague proteome reveals proteins linked to infection

...the plague-bacterium Yersinia pestis whose numbers rise and fall according to the disease’s virulence. The team, led by the Department of Energy laboratory staff scientists Mary Lipton and Kim Hixson, identified the proteins as “unique biomarkers related specifically to growth condition,?according to a s...

Getting to the heart of the heart

...e heart. This single cardiac progenitor cell gives rise to both myocardial cells, which form the beating m...al discovered a related progenitor cell that gives rise to the right-sided heart chambers, forming myocardial cells, smooth muscle cells, and endothelial ce...

Cloning techniques produce FDA-approved antibiotic

...ew treatments for bacterial infections. The rapid rise of antibiotic resistance poses a serious threat to human health, and demands new treatments effective against resistant pathogens. Fosfomycin is a natural antibiotic approved by the Food and Drug Administration for the treatment of various bacterial ...

Why Popeye only has eyes for spinach

...r degeneration but warn the incidence is likely to rise as the population ages. In collaboration with Tinsley Ophthalmic Instruments, Dr Murray's lab has developed a lightweight instrument that can measure the levels of lutein and zeaxanthin and provide an indication as to whether low levels of macular ...

Development of gene therapy

...han virtually any other type of therapy, has given rise not only to high expectations of treatment success but also great concerns regarding health risks. Since the Deutsche Forschungsgemeinschaft (German Research Foundation, DFG) issued its first memorandum in 1995, this field of research has developed e...

'Fruit fly dating game' provides clues to our reproductive prowess

...nhouse warming is well documented. The temperature rise was rapid, over about 20,000 years, and it stayed warm for about100,000 years, then cooled back to normal well before the mass extinction." Marine species at the time suffered from the heat. Most adapted to the stress conditions by dwarfing, growin...

Far more than a meteor killed dinos

...nhouse warming is well documented. The temperature rise was rapid, over about 20,000 years, and it stayed warm for about100,000 years, then cooled back to normal well before the mass extinction." Marine species at the time suffered from the heat. Most adapted to the stress conditions by dwarfing, growin...

Signaling for cartilage

... Institute investigator. This same stem cell gives rise to bone, cartilage, fat and fibroblasts. “The big question is what are the master genes that make a stem cell go one way versus another,?said Lee. Both SOX9 and RUNX2 are master transcription factors involved in the process of differentiating b...

Stem cell expansion

...opoietic stem cells (HSCs, the cells that can give rise to all blood and most immune cell types) can save patients whose own hematopoietic system is defective or has been destroyed (often through radiation or chemotherapy of cancer). HSCs are very rare, and it is often hard to obtain enough of them for a ...

Mobile DNA part of evolution's toolbox

...escendant of the ancient marine organism that gave rise to the terrestrial vertebrates more than 360 milli... lobe-finned fishes--the group of fishes that gave rise to both the coelacanth and terrestrial vertebrates. The LF-SINE was very active in the evolutionar...

Mouse study reveals new clues about virulence of 1918 influenza virus

...sive damage to lung tissues. This observation gave rise to the hypothesis that the 1918 flu virus infection provoked an uncontrolled inflammatory response leading to rapid lung failure and death. To test this idea, Dr. Tumpey infected mice intranasally with one of four types of flu virus: human seasona...

Electric fish in Africa could be example of evolution in action

...hes' general evolutionary pattern but doesn't give rise to separate species," said Arnegard, who will return to Gabon in June to conduct further tests, funded by the National Geographic Society. ...

Weizmann Institute scientists discover a molecular security mechanism for keeping mutations in check

... they don't rocket out of control, causing a sharp rise in our cancer risk? A preliminary answer to this question has come out of research carried out by Prof. Zvi Livneh and research student Sharon Avkin, along with research student Leanne Toube and Dr. Ziv Sevilya of the Biological Chemistry Departmen...

New strategy developed to combat West Nile Virus

...summer rainfall increases, surface humidity levels rise and the mosquitoes are able to disperse and initiate secondary transmission away from the original amplification sites, the researchers pointed out. With this dispersal, the mosquitoes are more likely to come into contact with humans ?elevating the r...

Evolution reveals an independent route for diversity in animal form

...roup from which it split--the Bilateria--has given rise to the vast majority of the animals we are familiar with, including worms, fish, molluscs, insects, and mammals. While all "higher" animals clearly either have a typical Hox system or had ancestors that did, the evolutionary origins of the Hox system...

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