Evolution News and Research

RSS

Nerve cells can also release neurotransmitters outside of synapses

Every neurobiology textbook invariably states that nerve cells communicate with each other through synapses, the specialized cell-cell contacts found at the end of the cells' threadlike extensions. In the journal Science, researchers at the Salk Institute for Biological Sciences and the University of California at San Diego report that nerve cells, or neurons, may not have to rely on traditionally defined synapses to "talk" to each other.

18 Jul 2005

New method may accelerate the way cancer-causing genes are found

Researchers at the University of Minnesota Cancer Center and the National Cancer Institute (NCI) have discovered a new method that could accelerate the way cancer-causing genes are found and could lead to a more accurate identification of the genes, according to two studies in the July 14, 2005, issue of Nature.

13 Jul 2005

Our thirst for novelty begins in the eye itself

Researchers at Harvard University have found evidence that the retina actively seeks novel features in the visual environment, dynamically adjusting its processing in order to seek the unusual while ignoring the commonplace. The scientists report in this week's issue of the journal Nature on their finding that this principle of novelty-detection operates in many visual environments.

13 Jul 2005

Team of experts sent to Vietnam to study bird flu risk

The World Health Organization (WHO) has sent a team of international experts to Vietnam to study whether the H5N1 bird flu virus could be evolving into a form that might trigger a human pandemic.

26 Jun 2005

Rosetta Genomics identifies hundreds of novel human microRNAs

In a study published online this week and to be published as a cover story in the July issue of Nature Genetics, Rosetta Genomics' scientists report identification of hundreds of human microRNA genes, including the first report of primate specific microRNAs.

21 Jun 2005

Fragile-X-syndrome research

The fragile-X-syndrome is the most common hereditary form of mental retardation and occurs much more often in boys than in girls.

20 Jun 2005

Scientists have tracked down the biological trigger that gives rise to Van Buchem disease

...a hereditary, disfiguring bone disorder that can cause blindness and deafness. The findings provide insight into long-range gene regulation and could lead to new treatments for osteoporosis and other crippling bone disorders.

16 Jun 2005

Research challenges the evolutionary paradigm that continuous alterations occur during the course of genome evolution

Researchers report today that regions of the human genome have been hotspots for acquiring duplicated DNA sequences - but only at specific time-points during evolution.

16 Jun 2005

Cockroach holds secret of women's fertility

The suggestion that a woman’s reproductive history may affect her ability to have children in the future has been a puzzle to scientists for years.

From The University of Manchester 16 Jun 2005

Jumping genes help detemine uniqueness of individual brains

Scientists at the Salk Institute for Biological Studies may have found one explanation for the puzzling variety in brain organization and function: mobile elements, pieces of DNA that can jump from one place in the genome to another, randomly changing the genetic information in single brain cells.

15 Jun 2005

New research shows that genes exert powerful effect on sexual behavior

New research has shown that the manipulation of a single gene in female fruit flies can make their sexual behavior resemble that of males, in a study that demonstrates the power of individual genes and the profound impact of genetics on complex sexual behavior.

15 Jun 2005

Genetic variations predispose Mexican Americans to insulin resistance

Although numerous studies have shown that low-grade inflammation is linked to heart disease and diabetes, more recent studies have shown that inflammation plays a role in insulin resistance, a syndrome that leads to diabetes and heart disease and affects about one in four adults in the United States.

12 Jun 2005

Accumulation of genetic changes is not solely determined by natural selection

New data suggest that the accumulation of genetic changes is not solely determined by natural selection. A study by University of Chicago researchers contradicts conventional theory by showing that the percentage of mutations accepted in evolution is also strongly swayed by the speed at which new mutations arrive at a gene: the faster the speed of new mutations, the greater the percentage of those mutations accepted.

9 Jun 2005

Girls who can't orgasm can blame it on their genes

Scientists have discovered that an inability in some women to acheive an orgasm may have a genetic cause.

8 Jun 2005

Diversity of HLA genotypes in humans is shaped to a significant degree by pathogens

The great physical diversity that evolution has forged in human beings is in evidence wherever we look, but the genes exhibiting the greatest diversity at the DNA level happen to function in a wholly invisible process: immunity. Genes encoding the Human Leukocyte Antigen (HLA) proteins are among the most diverse in the human genome, and scientists have proposed a number of hypotheses to explain why.

6 Jun 2005

Role of toxins in inherited disease

A disease you are suffering today could be a result of your great-grandmother being exposed to an environmental toxin during pregnancy.

3 Jun 2005

Lactose intolerance linked to ancestral environment

Got milk? Many people couldn't care less because they can't digest it. A new Cornell University study finds that it is primarily people whose ancestors came from places where dairy herds could be raised safely and economically, such as in Europe, who have developed the ability to digest milk.

1 Jun 2005

Interaction between cell and virus provides scientists valuable insights into the development of safe viral vectors for use in oncology

When infected by a virus, a cell uses specific defense mechanisms developed in the course of a long evolution. Thus, it can activate enzymes that disrupt or prevent replication of the viruses within the cell.

1 Jun 2005

Tendency to be prejudiced is a form of common sense, hard-wired into the human brain

Contrary to what most people believe, the tendency to be prejudiced is a form of common sense, hard-wired into the human brain through evolution as an adaptive response to protect our prehistoric ancestors from danger.

26 May 2005