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Jefferson scientists learn how HIV causes dementia

Ever since the AIDS epidemic began more than two decades ago, scientists have been trying to understand why as many as one-quarter of those infected with HIV develop dementia.

19 Apr 2004

Brain cells can improve their ability when working together

Team work is just as important in your brain as it is on the playing field: A new study published online on April 19 by the Proceedings of the National Academy of Sciences reports that groups of brain cells can substantially improve their ability to discriminate between different orientations of simple visual patterns by synchronizing their electrical activity.

19 Apr 2004

Two recent innovations look set to revolutionize biomedical treatment.

The first innovation is probably the world’s first multiple drug-eluting biodegradable stent for use in any part of the body where fluid flow, including blood, is disrupted.

19 Apr 2004

New information about how the brain processes information about an object's brightness

Howard Hughes Medical Institute scientists at The Salk Institute have discovered a new class of optical illusion that they have studied in detail to show that humans use both the timing and spatial context of a visual stimulus to judge brightness.

19 Apr 2004

New evidence that brain circuits involved in drug addiction are also activated by the desire for food

Scientists at the U.S. Department of Energy’s Brookhaven National Laboratory have produced new evidence that brain circuits involved in drug addiction are also activated by the desire for food.

19 Apr 2004

Repeated pregnancies may increase cardiovascular disease

The study was designed to measure the blood pressure responses to phenylephrine and to acute stress in conscious age-matched repeatedly breed (RB) and virgin rats.

19 Apr 2004

Do you see what I see?

A rose is a rose is a rose, but do we and the artist and poet all see the same flower in the same way? This age-old philosophical question has now been put to the test by scientists at the Weizmann Institute.

19 Apr 2004

Lack of evidence of sexual transmission of Hepatitis C among monogamous couples

Italian researchers have evaluated the risk of sexual transmission of hepatitis C virus (HCV) infection among 895 monogamous heterosexual partners of HCV chronically infected individuals in a long-term prospective study.

19 Apr 2004

Brain folding could be an indication of how smart a person is

A study by Melbourne scientists has provided the first direct evidence that differences in the way the surface of the human brain is folded could be an indication of how smart a person is.

18 Apr 2004

Identification of first protein biomarkers to help patients with amyotrophic lateral sclerosis

A University of Pittsburgh pathologist has identified the first protein biomarkers able to diagnose patients with amyotrophic lateral sclerosis (ALS, also known as Lou Gehrig's disease) with near 100 percent accuracy. Before this finding, there were no known diagnostic biomarkers for this neurodegenerative disease.

18 Apr 2004

Researchers find drug that may suppress genetic mutation using a novel screening approach

Researchers at Massachusetts General Hospital have developed a way of identifying promising new drugs that may get around a major challenge in drug discovery.

18 Apr 2004

Gene discovery could improve anemia treatment in patients

Patients with inflammatory diseases such as arthritis, chronic infections and some types of cancer, often become anemic – a condition called anemia of chronic disease (ACD). While ACD rarely kills patients, it can make their lives miserable.

18 Apr 2004

New method that will revolutionize the search for genes

Medical researchers know that most common human diseases, such as hypertension and diabetes, have a large genetic component. Many genes, interacting with the environment, contribute to these diseases. For researchers, a major challenge is finding all the genes involved with a particular disease.

18 Apr 2004

Second-hand smoke scars and affects healing

Researchers at the University of California, Riverside have found that breathing “second-hand” smoke reduces the speed at which wounds heal, leading to greater levels of scarring.

17 Apr 2004

Genetic connection between humans, mice and dogs

The discovery that humans are genetically close to mice and dogs might make people develop greater respect for life, J. Craig Venter, a major contributor to the historic mapping of the human genome, said.

16 Apr 2004

New information on genetic shuffling before egg or sperm formation rewrites genetic theory

Key decisions in the genetic shuffling that occurs before eggs or sperm are formed are made earlier than thought, rewriting textbook genetics, according to recent papers from researchers at UC Davis, Harvard University and UC San Diego.

16 Apr 2004

Lack of exercise causes physical and psychological setbacks

Use it or lose it, fitness experts tell us. Now a new study offers evidence that the adage really does ring true – that a lack of exercise can not only cause physical setbacks, but also psychological setbacks as well.

16 Apr 2004

Stem cell personal space determines their future

Johns Hopkins scientists report that restricting the shape and personal space of human stem cells from bone marrow is more important than any known molecular signal in determining the cell type they become.

16 Apr 2004

New centre for AIDS research opens in Southampton UK

International experts on HIV/AIDS were in Southampton today (Thursday 15 April) to mark the official opening of a new Centre for AIDS Research at the city's University.

16 Apr 2004

Extensive gene traffic, the process of genes leaving and arriving on the chromosome

Researchers at the University of Chicago have discovered there is extensive gene “traffic”—the process of genes leaving and arriving on the chromosome—on the mammalian X chromosome. They also have overturned a conventional theory about how genes evolved on the sex chromosome.

16 Apr 2004