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Tag: "roundworm" at biology news

Left-right wiring determined by neural communication in the embryonic worm

...lut of asymmetries. Worms aren't so different: The roundworm Caenorhabditis elegans has nerves on its left and right sides that perform different functions. Like handedness, the determination of which nerves develop on which side seems random from worm to worm. But now, Rockefeller University and Howard Hughe...

Worms produce surprise insight into human fever

...0 trillion cells. An adult Caenorhabditis elegans roundworm has exactly 959 cells. Yet we have an awful lot in common, says Alejandro Aballay of Duke University, who has been exploring two “highly conserved? cell-signaling pathways for innate immunity shared by worms and humans. For one, we have a lot of c...

Bacterial protein shows promise in treating intestinal parasites

...UCSD colleagues discovered five years ago that the roundworm C. elegans and other nematodes are susceptible to the effects of Cry5B, then known primarily as an insecticide. The toxin forms tiny holes in the membranes of the cells of nematodes and insects. However, since the toxin can't bind to the cells of mam...

Parkinson's disease mechanism discovered

...synuclein toxicity in the fruitfly Drosophila, the roundworm C. elegans and in cultures of rat neurons. Bonini and her colleagues tested the effect in fruitflies; co-author Guy Caldwell and his colleagues at the University of Alabama performed the tests in roundworms; and co-author Jean-Christophe Roche and hi...

Scientists discover a genetic switch that links animal growth and cancer

...ins called tumor suppressors. Working with a tiny roundworm known as Caenorhabditis elegans, an important animal model in biomedical science, the researchers discovered that a tumor suppressor known as PTEN also functions to keep the animal in a waiting state by blocking cell growth when food is absent. If t...

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

...al Studies demonstrate for the first time that the roundworm Caenorhabditis elegans succumbs to the trials of o...gans. Researchers use this 1 millimeter-long soil roundworm that feeds on bacteria mainly because it is simple, easy to grow in bulk populations, and is quite c...

Possible treatment found for 'chemobrain'

...alaria-carrying mosquito (Anopheles gambiae) and a roundworm (Heterorhabditis bacteriophora). Researchers will ... functional elements of the Anopheles genome. The roundworm genome is important because its sequence will aid in comparative annotation of the genomes of other ...

NHGRI Selects 13 More Organisms for Genome Sequencing

...alaria-carrying mosquito (Anopheles gambiae) and a roundworm (Heterorhabditis bacteriophora). Researchers will ... functional elements of the Anopheles genome. The roundworm genome is important because its sequence will aid in comparative annotation of the genomes of other ...

New Look at DNA Hints at Origin of UV Damage

...m not only demonstrated that the use of the common roundworm is a valid model for studying the virulence of Yersinia pestis, the bacterium that causes plague. They also showed that the interaction between Y. pestis and the worm is quite similar to what occurs in mammals, including humans. The work indicates th...

Novel plague virulence factor identified

...m not only demonstrated that the use of the common roundworm is a valid model for studying the virulence of Yersinia pestis, the bacterium that causes plague. They also showed that the interaction between Y. pestis and the worm is quite similar to what occurs in mammals, including humans. The work indicates th...

Scientists identify genetic pathways essential to RNA interference

... RNAi was originally identified in the C. elegans roundworm and the flowering plant Arabidopsis thaliana, both of which are common model organisms for biological research. The process interrupts the usual transfer of instructions from double-stranded DNA, through single-stranded messenger RNA and finally into...

UCSD discovery may help extend life of natural pesticide

...people worldwide. "Our previous findings with the roundworm C. elegans strongly suggested that specific sugar ...that allows the toxin to recognize its "victim"--a roundworm or an insect. This paper also brings us from the conceptual realm to the chemical nature of these su...

Scientists identify genetic pathways essential to RNA interference

... RNAi was originally identified in the C. elegans roundworm and the flowering plant Arabidopsis thaliana, both of which are common model organisms for biological research. The process interrupts the usual transfer of instructions from double-stranded DNA, through single-stranded messenger RNA and finally into...

Critical role in programmed cell death identified

...he importance of mitochondria in cell death in the roundworm C. elegans, enhancing the view of how cell death is conserved from worms to humans. "Now it seems that there is really one way of killing cells and it involves these mitochondria. Using genetics, we could rigorously show that mitochondria are part o...

“Nano-scissors?laser shows precise surgical capability

...lanesthetized C. elegans, a widely studied type of roundworm about onemillimeter long. A femtosecond is one millionth of a billionth of asecond.“The time is very important here,?she says. “Because it happens sofast, there isn’t enough time for heat to diffuse out, so we don’tdamage anything. The pulse’s very s...

Research on Worms Yields Clues on Aging

...have anti-aging activity."The researchers grew the roundworm C. elegans in the presence of the 19drugs and found that an anticonvulsant, ethosuximide, extended theworms' lives from an average of 17 days to an average of 20 days.Further tests on anticonvulsants revealed that they also increased lifespan, with t...

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