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Zebrafish study shows key enzyme in gut is a peacemaker

University of Oregon scientists, using zebrafish to study the gastrointestinal tract, say that an enzyme long assumed to be involved in digestion instead is a detoxifying traffic cop, maintaining a friendly rapport between resident gut bacteria and cells.

13 Dec 2007

More regulatory DNA than previously thought

Surrounding the small islands of genes within the human genome is a vast sea of mysterious DNA. While most of this non-coding DNA is junk, some of it is used to help genes turn on and off.

13 Dec 2007

Losses of long-established genes contribute to human evolution

While it is well understood that the evolution of new genes leads to adaptations that help species survive, gene loss may also afford a selective advantage.

13 Dec 2007

Can interacting pathogens explain disease patterns?

A new study into the way in which parasites interact with each other could help predict when infectious diseases are likely to break out.

13 Dec 2007

Scientists seek to assess the microbial risks in the water we drink

It is a familiar scenario experienced around the world: an outbreak of gastrointestinal illness suddenly emerges in a community, and no one knows where it came from or how to stop it. At the start of the outbreak, only a few people are affected, most often the very old and the very young.

12 Dec 2007

When a female is attracted to a male some of her genes turn on and off

When a female is attracted to a male, entire suites of genes in her brain turn on and off, show biologists from The University of Texas at Austin studying swordtail fish.

10 Dec 2007

Scientists levitate cells with light to sort

Separating out particular kinds of cells from a sample could become faster, cheaper and easier thanks to a new system developed by MIT researchers that involves levitating the cells with light.

10 Dec 2007

Human evolution in genetic fast lane

Countering a common theory that human evolution has slowed to a crawl or even stopped in modern humans, a new study examining data from an international genomics project describes the past 40,000 years as a time of supercharged evolutionary change, driven by exponential population growth and cultural shifts.

10 Dec 2007

Genetic evidence that human evolution is speeding up

Researchers discovered genetic evidence that human evolution is speeding up – and has not halted or proceeded at a constant rate, as had been thought – indicating that humans on different continents are becoming increasingly different.

10 Dec 2007

Genetic animal model of autism

By introducing a gene mutation in mice, investigators have created what they believe to be the first accurate model of autism not associated with a broader neuropsychiatric syndrome, according to research presented at the American College of Neuropsychopharmacology annual meeting.

10 Dec 2007

Tuberculosis found in 500,000-year-old human

Although most scientists believe tuberculosis emerged only several thousand years ago, new research from The University of Texas at Austin reveals the most ancient evidence of the disease has been found in a 500,000-year-old human fossil from Turkey.

10 Dec 2007

Closest look ever at native human tissue

Seeing proteins in their natural environment and interactions inside cells has been a long-standing goal.

5 Dec 2007

Pheromones identified that trigger aggression between male mice

A family of proteins commonly found in mouse urine is able to trigger fighting between male mice, a study in the Dec. 6, 2007, issue of Nature has found.

5 Dec 2007

Cell shape - scientists gain better understanding with new assay

Cells in our body come in various shapes and sizes. Each cell is shaped in such a way as to optimise it for a specific function. When things go wrong and a cell does not adopt its dedicated shape, its function can be impaired and the cell can cause problems in the body.

3 Dec 2007

Bacteria cheat on their mates for own good

Pursuing our own short term interests by cheating on the rest of the population is not the preserve of the human race.

29 Nov 2007

Scientists observe gene activity outside the body

Researchers at Jefferson Medical College and Jefferson's Kimmel Cancer Center in Philadelphia have used PET imaging to see hyperactive cancer genes inside breast tumors in laboratory animals, marking the first time such gene activity has been observed from outside the body.

29 Nov 2007

Aging in mice at the molecular level

Researchers at the National Institute of Aging and Stanford University have used gene arrays to identify genes whose activity changes with age in 16 different mouse tissues.

29 Nov 2007

Scientists create mouse resistant to cancer

A mouse resistant to cancer, even highly-aggressive types, has been created by researchers at the University of Kentucky.

27 Nov 2007

Australian researcher heralds a golden age in biomedical science

A senior University of Sydney researcher has heralded a 'golden age' of modern biochemistry and molecular biology brought about by our complete sequencing of the human genome.

27 Nov 2007

Scientists examine eons-old water for microorganisms

Researchers from the University of Delaware and the University of California at Riverside have thawed ice estimated to be at least a million years old from above Lake Vostok, an ancient lake that lies hidden more than two miles beneath the frozen surface of Antarctica.

27 Nov 2007