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Tag: "evolutionary" at medical news

Gene Responsible for Ageing Process Discovered – and Calorie Restriction Could Hel

...nimal kingdom. Some scientists suggested it was an evolutionary adaptation to surviving hard times until enough food became available. The longevity-associated gene identified by Dr Dillin and his colleagues is known as PHA-4 - the name of the protein for which the gene is responsible. The same gene also exists...

Useful Parasites

...y by the host on the Wolbachia for survival," said evolutionary biologist Andrew Weeks at the University of Melbou...some nutritional benefit in the host. Remarkable evolutionary changes usually millions of years but here in this aspect it has taken only 2 decades which is quite...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

...lexible phallus,” she said. "You can envision an evolutionary scenario that, as the male phallus increases in si...ze, the female creates more barriers. You get this evolutionary arms race," Brennan said. Only if the female is relaxed and cooperative can the male's sperm get a...

Scientists Make Major Breakthrough in Regenerative Medicine

... by the body itself. Researchers show that a human evolutionary ancestor, the sea squirt, can correct abnormalitie...shing them in the greater chain of life and on the evolutionary ladder. Specifically, sea squirts, like humans, belong to a group of animals called chordates (organ...

The Origin of the Brain Lies in a Worm

...hout evolution are the next exciting questions for evolutionary biologists." Source-Eurekalert...

Genetic Technology and Eugenics

...e conceivable that we will begin to design our own evolutionary progress'. // ...ISAAC ASIMOV The desire to strive towards betterment is an inborn human trait that has transformed man from a long-tailed, tree-swinging primate to a techno-savvy, go-getter. Although desire has been considered the root cause of ...

New Hope For People With Liver And Kidney Ailments

...D., Editor-in-Chief of The FASEB Journal. "And the evolutionary implications make it even more compelling—hook, li...roteins in numerous organisms, adds a piece to the evolutionary puzzle, by suggesting that Rh proteins were developed very early in the evolution of animal systems,...

Scientists Explore Ways to Lure Viruses to Their Death

... viruses into extinction?” asks Paul E. Turner, an evolutionary biologist at Yale. Dr. Turner and his colleagues are trying to find the answer, but instead of studying mice, they are studying bacteria. The researchers study a virus called phi-6, which normally infects a species of bacteria called Pseudomonas ph...

Tooth Decay Bacteria Evolved Along With Man

...e strains," Caufield said, "We have constructed an evolutionary family tree with its roots in Africa and its main branch extending to Asia. A second branch, extending from Asia back to Europe, traces the migration of a small group of Asians who founded at least one group of modern-day Caucasians." Additional ...

The Science of Happiness

...found that the orbito frontal cortex , a ‘recent’ evolutionary development, correlates with subjective reports of pleasure, which incorporates cognitive and emotive judgments. Some scientists have proved that ‘happy images’ kindled that part of the brain that was associated with gloom in people suffering from ...

Eat Chillies, Burn Fat

...t the burning sensation of the chilli pepper is an evolutionary ploy to stop mammals eating them. Chilli is already thought to speed up metabolism, aiding weight loss. Earlier, researches found it could also cause prostate and pancreatic cancer cells to kill themselves. It also helps prevent and heal stomach ul...

UCI Scientists Reconstruct Migration of Avian Flu Virus

...ntly," said Walter Fitch, professor of ecology and evolutionary biology in the School of Biological Sciences at UC...ematically track the migration of H5N1 through its evolutionary history, adding new details that identify the relative importance of the geographic and evolutionary...

Computer Tool Helps Pinpoint Risky Gene Mutations

...The third category was an assessment of the gene’s evolutionary history, looking at how long the changed amino aci...because harmful mutations tend to be eliminated by evolutionary selection because of the damage they inflict on their carriers. The researchers plugged these fact...

Mathematical Model Predicts Cholera Outbreaks

...aid Pascual, an associate professor of ecology and evolutionary biology. "We also wanted to know whether incorporating ENSO into the model would improve the accuracy of our predictions." The challenge for the model was particularly interesting because the past five years were atypical, with fewer cholera cases th...

X-ray System to Show Moving Bones in 3-D

... the best way to repair a torn knee ligament or an evolutionary biologist tracing the disappearance of digits in pigs would face a difficult task. To see the exact position and movement of bones and the ligaments, tendons and cartilage that surround them, would require cutting into flesh -- not a desirable option...

Less-lethal Strains of Bird Flu Virus may Become the Biggest Killer

...r will never be known. "This makes sense from an evolutionary viewpoint. If a virus is so lethal that it kills 50 percent of its hosts, then it will not transmit very far to infect many other people, and it will die out relatively quickly. It is less likely to become a worldwide pandemic," Tang said. The H5N1...

How Many Genes Does It Take to Learn? Lessons from Sea Slugs

...naling pathways in Aplysia that sheds new light on evolutionary relationships of this very ancient and highly successful marine animal," said Dennis Steindler, Ph.D., executive director of UF's McKnight Brain Institute, who did not participate in the research. "A very important part of this study is the discovery...

Study Offers Window into Human Behavior, Brain Disease

...age 65. Because the cells arose only recently in evolutionary history -- in a common ancestor of great apes and ... he reflects. "I think it's fascinating from an evolutionary perspective that we have these new neurons that are involved in social behavior that are selectively...

Run Amok Enzyme Causes Same Problems in Both Humans and Fruit Flies

..., Doe’s team found that a mutation in aurora-A, an evolutionary conserved gene in fruit flies and humans, results in two distinguishing problems: Proteins (Numb) involved in the differentiation into neurons and neuroblast self-renewal (aPKC) are not sorted to their proper sides of the cell, and the mitotic spindl...

Structure of Iron Regulatory Protein-RNA Complex Solved

... conclusion. "What remains to be determined is the evolutionary origin and selective advantage of such dramatic conformational plasticity and dual functionality as found in IRP1." Source-Newswise...

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