A new influenza virus discovered in Missouri pigs has a combination of genes from avian and swine flu viruses, supporting the theory that pigs can serve as a mixing vessel for flu viruses and a potential source for a human pandemic strain, according to a report published yesterday. 

Researchers found that the virus, an H2N3 subtype, caused illness in experimentally infected mice and was transmissible in swine and ferrets, suggesting it has adapted to mammals, according to the report, published in the Proceedings of the National Academy of Sciences (PNAS). In addition, genetic analysis showed the virus has a mutation linked with an increased ability to infect mammals. 

Highly publicized events such as school shootings arouse public interest in the effects of media violence exposure on children, yet there is still considerable public debate about whether to take this issue seriously.

A recent article in Social Issues and Policy Review summarizes the research on the effects of media violence and convincingly demonstrates the profound influence that media violence is having in our society.

The many studies that have been compiled on the effects of viewing media violence show that there are at least 14 scientifically documented effects on children’s physiological and psychological well-being, both in the short and long term.

According to a new survey, 52 percent of Americans plan to lose weight in 2008 but as January comes closer and marketing efforts promising quick and easy weight-loss solutions ratchet up, people are increasingly confused about what to believe.

When it comes to weight-loss products, people who plan to lose weight have considerable knowledge gaps, particularly with regard to appetite suppressants, herbal products and dietary supplements.

These products are not required by the Food and Drug Administration (FDA) to submit safety or efficacy studies, or to include warnings about potential side effects on their labels.

Chronic obstructive pulmonary disease (COPD) is the name given to two lung diseases that frequently co-exist, bronchitis and emphysema, characterized airflow obstruction that interferes with breathing. COPD is the fourth leading cause of death in America, claiming the lives of 122,283 Americans in 2003 and the number of women dying from the disease has surpassed the number seen in men.

Patients with severe COPD may benefit more from therapy that combines salmeterol and fluticasone [SFC] than treatment with tiotropium, according to results from a long-term, multi-center study, “Investigating New Standards for Prophylaxis in Reducing Exacerbations” (INSPIRE) that directly compared the two therapies.

Genome rearrangements, resulting in variations in the numbers of copies of genes, occur when the cellular process that copies DNA during cell division stalls and then switches to a different genetic “template,” said researchers at Baylor College of Medicine in Houston in a report that appears today in the journal Cell.

The new mechanism is called replication. “Fork Stalling and Template Switching,” said Dr. James R. Lupski, Cullen professor of molecular and human genetics and vice chair of the department at BCM. It not only represents a new way in which the genome generates DNA copy number variation, but it also demonstrates that copy number variation can occur at a different time point in the life of a cell. DNA replication takes place as the cell is dividing and becoming two.

Laser surgery to correct vision problems has been in use since the early 1990s. Photorefractive Keratotomy (PRK) is typically used to correct low to moderate myopia, while laser in-situ keratomileusis (LASIK) is preferred for high myopia corrections. Although over 18 million LASIK procedures have been performed worldwide, there is still some controversy regarding the maximum correction possible and efficacy with this technique.

In an article published in the January 2008 issue of the American Journal of Ophthalmology, researchers from Miguel Hernandez University, Medical School, Alicante, Spain; and Ankara University School of Medicine, Ankara, Turkey; report on a study of high myopia patients ten years after LASIK surgery.