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Tag: "worms" at biology news

The earliest animals had human-like genes

...out what the common ancestors of humans, flies and worms were like." Until quite recently, such comparisons could only be made by looking at physical characteristics such as the structure of bones, teeth, or tissues. But DNA sequencing now permits scientists to make comparisons of the genetic code and rea...

Regenerating worms help elucidate stem cell biology

...ls in half, and a week later, two fully functional worms will have developed from the pieces. Cut a piece t...ing up of the sides of the body. Not surprisingly, worms without neoblasts also lose their ability to regenerate. With their unparalleled capacity for rege...

Zebrafish may hold key to improved cancer research

...ars of divergent evolution in species ranging from worms to fruit flies, fish and humans. When it functions normally, B-myb appropriately regulates cell proliferation. When it becomes mutated, either through genetic predisposition or environmental influences, the formation of tumors can dramatically incre...

New discovery: If it weren't for this enzyme, decomposing pesticide would take millennia

...es of a common powerful pesticide used for killing worms on potatoes, researchers have found. That may be expensive for farmers but lucky for the environment because University of North Carolina at Chapel Hill scientists have now discovered that if that particular enzyme weren't there, it would take 10,00...

Tiny roundworm's telomeres help scientists to tease apart different types of aging

...viding cells eroding slowly over time? If so, will worms with longer telomeres live longer? If not, how do ...length and cellular senescence in mammalian cells, worms with long telomeres were neither long lived, nor did worm populations with short telomeres exhibit a...

No single gene for ageing

...individuals can be seen in organisms such as round worms ?and in humans." Studies of ageing also give insight into the causes of cancer, because cancer and ageing have the same background causes, thinks Vilhelm Bohr, professor at the University of Baltimore in the United States. "Cancer is more frequent ...

Researchers find how some antibiotics kill bacteria

...ich causes stomach ulcers; and even some parasitic worms by eliminating the symbiotic bacteria parasites depend on. "It's the kind of drug the pharmaceutical business wants to produce," Artsimovitch said. "They're looking for the broadest range of antibiotics possible. Rifamycins would be ideal drugs if w...

Once given 'no respect,' cells' tiny RNAS take driver's seat

...ll division, cell specialization and cell death in worms and flies and are off-kilter in human cancers, but the Myc protein is the first factor identified that controls the production of microRNAs. Myc (pronounced "mick") is already known to regulate about 10 percent to 15 percent of the genes in the huma...

Deep sea buffet for bone-devouring worms

...en bacteria and a newly discovered group of marine worms is the only known partnership (or symbiosis) which...cies in only three years, suggests that the Osedax worms and their bacterial 'partners' are likely to play substantial roles in the cycling of nutrients into...

Molecular miners find pain relief drugs from the sea

...eptides. Fortunately, most cone snails hunt marine worms or other molluscs and are not harmful to humans. It may seem unusual that toxic venoms can also be a source of pain relieving medication for humans. Associate Professor Livett explains, "It appears that cone snails have adopted the general strategy...

MicroRNA tweaks protein that controls early heart development

...r. Zhao analyzed all the known microRNA targets in worms and fruit flies to determine what they had in common, hoping to find clues to help predict unknown targets in mammals. He then used those criteria to search the entire mouse genome for potential microRNA targets. "If this method of predicting target...

President Bush's cut to AIDS prevention in Africa would be devastating

...reza) and were analyzed for the eggs and larvae of worms and protozoan cysts. The study appears online ahead of publication in the Journal of Applied Ecology. While the three primate species were subject to a higher risk of infections, only the guenons (pronounced GWINN-ins) suffered from an increased nu...

Affymetrix and ParAllele Launch Industry's Most Comprehensive Product Line for Targeted Genotyping

...reza) and were analyzed for the eggs and larvae of worms and protozoan cysts. The study appears online ahead of publication in the Journal of Applied Ecology. While the three primate species were subject to a higher risk of infections, only the guenons (pronounced GWINN-ins) suffered from an increased nu...

Logging changed ecological balance for monkeys, damaged health

...reza) and were analyzed for the eggs and larvae of worms and protozoan cysts. The study appears online ahead of publication in the Journal of Applied Ecology. While the three primate species were subject to a higher risk of infections, only the guenons (pronounced GWINN-ins) suffered from an increased nu...

New lifespan extension genes found

...to extend the lifespan of species including yeast, worms and rodents. Previous research linked a gene calle...lifespan extension due to caloric restriction, but worms and yeast that lack Sir2 also live longer when put on a tough diet, showing that some other genes mu...

Scientists find that protein controls aging by controlling insulin

...fespan ?a phenomenon found in animals ranging from worms to fruit flies to mice. The mice with higher levels of Klotho had more insulin in their system than the normal mice, suggesting that the Klotho mice were resistant to insulin; they had to make more of it to make up for the resistance. The opposite ...

Researchers feed tiny pills of RNA to planarians to identify genes essential for regeneration

...ding microscopic pills of RNA to quarter-inch long worms called planarians-have identified many genes essen...ility to regenerate. Chop one in half, and two new worms grow. Their ability to regenerate is so prolific that a tissue fragment only 1/279th of the worm's l...

New Look at DNA Hints at Origin of UV Damage

...st to other animal models, large quantities of the worms can be grown quickly and can even be frozen and used later. "C elegans lives in the soil, so it continually comes into contact with bacteria and other microbes," Aballay said. "It has a highly developed system for not only recognizing bacteria, but ...

Novel plague virulence factor identified

...st to other animal models, large quantities of the worms can be grown quickly and can even be frozen and used later. "C elegans lives in the soil, so it continually comes into contact with bacteria and other microbes," Aballay said. "It has a highly developed system for not only recognizing bacteria, but ...

Fluorescing lab worms signal longer life spans

... to predict the individual life spans of identical worms that were genetically engineered to illuminate str...of cellular health. The eyelash-sized, translucent worms that fluoresced the brightest after being subjected to high temperatures as young adults had signifi...

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