ScienceDaily: Top Health News

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• Bacteria responsible for gum disease facilitates rheumatoid arthritis
• Americans living longer, more healthy lives
• Genes linked to being right- or left-handed identified
• Teen driving and marijuana use: More one in four high school seniors drive after using alcohol or drugs, or ride with a driver who has
• Contribution of local animal populations to human Salmonella infections overstated
• Scientists pinpoint proteins vital to long-term memory
• Radical new view of health: Stem cells are wired for cooperation, down to the DNA
• Molecule that triggers septic shock identified
• Molecular structure reveals how HIV infects cells
• Helper cells trigger potent responses to HIV
• Autism gene stunts neurons, but growth can be restored
• Alzheimer's patients show striking individual differences in molecular basis of disease
• Treat the fungus among us with nontoxic medicinal compound
• Hate the sound of your voice? Not really
• Researchers hit virtual heads to make safer games
• Brain atrophy linked with cognitive decline in diabetes
• Novel vaccine reduces shedding of genital herpes virus
• Everyday sadists take pleasure in others' pain
• Forcing cancer to digest itself
• New heart catheter on a U. S. patient for first time
• Codeine could increase users' sensitivity to pain
• Guppy fish proven to be cheap, effective tool in fight against Dengue fever
• Testosterone deficiency not the only cause of changes with age in men
• Fat marker predicts cognitive decline in people with HIV

Bacteria responsible for gum disease facilitates rheumatoid arthritis Posted: 12 Sep 2013 05:33 PM PDT A research team has uncovered how the bacterium responsible for periodontal disease, Porphyromonas gingivalis, worsens rheumatoid arthritis by leading to earlier onset, faster progression and greater severity of the disease, including increased bone and cartilage destruction.

Americans living longer, more healthy lives Posted: 12 Sep 2013 05:33 PM PDT In a first-of-its-kind study, researchers have found that the average 25-year-old American today can look forward to 2.4 more years of a healthy life than 20 years ago while a 65-year-old today has gained 1.7 years.

Genes linked to being right- or left-handed identified Posted: 12 Sep 2013 05:32 PM PDT A genetic study has identified a biological process that influences whether we are right-handed or left-handed. Scientists found correlations between handedness and a network of genes involved in establishing left-right asymmetry in developing embryos.

Teen driving and marijuana use: More one in four high school seniors drive after using alcohol or drugs, or ride with a driver who has Posted: 12 Sep 2013 05:28 PM PDT A new study finds that 28 percent of U.S. high school seniors have driven after using drugs or drinking alcohol in the past two weeks, or ridden in a vehicle with a driver who did. In particular, driving after smoking marijuana has increased over the past three years.

Contribution of local animal populations to human Salmonella infections overstated Posted: 12 Sep 2013 11:34 AM PDT A new study has shown that, contrary to popular belief, local domestic animals are unlikely to be the major source of antibiotic resistant Salmonella in humans.

Scientists pinpoint proteins vital to long-term memory Posted: 12 Sep 2013 11:33 AM PDT Scientists have found a group of proteins essential to the formation of long-term memories.

Radical new view of health: Stem cells are wired for cooperation, down to the DNA Posted: 12 Sep 2013 11:32 AM PDT We often think of human cells as tiny computers that perform assigned tasks, where disease is a result of a malfunction. But researchers now offer a radical view of health — seeing it more as a cooperative state among cells, while they see disease as result of cells at war that fight with each other for domination.

Molecule that triggers septic shock identified Posted: 12 Sep 2013 11:32 AM PDT Researchers have identified a sensor pathway inside cells. These internal sensors are like motion detectors inside a house; they trigger an alarm that signals for help — a response from the immune system.

Molecular structure reveals how HIV infects cells Posted: 12 Sep 2013 11:32 AM PDT A team scientists has determined the high-resolution atomic structure of a cell-surface receptor that most strains of HIV use to get into human immune cells. The researchers also showed where maraviroc, an HIV drug, attaches to cells and blocks HIV's entry.

Helper cells trigger potent responses to HIV Posted: 12 Sep 2013 10:20 AM PDT A major new finding that will significantly advance efforts to create the world's first antibody-based AIDS vaccine shows that certain helper T cells are important for triggering a strong antibody response against HIV, the virus that causes AIDS.

Autism gene stunts neurons, but growth can be restored Posted: 12 Sep 2013 10:19 AM PDT A new study reports that mutation of a gene associated with some autism forms in humans can hinder the proper growth and connectivity of brain cells in mice. It also shows how that understanding allowed these cells to restore proper growth in the lab.

Alzheimer's patients show striking individual differences in molecular basis of disease Posted: 12 Sep 2013 10:19 AM PDT Alzheimer's disease is thought to be caused by the buildup of abnormal protein deposits in the brain, but little is known about the molecular structures of these beta-amyloid fibrils. A new study has revealed that distinct molecular structures may predominate in the brains of Alzheimer's patients with different clinical histories and degrees of brain damage. The findings pave the way for new patient-specific strategies to improve diagnosis and treatment.

Treat the fungus among us with nontoxic medicinal compound Posted: 12 Sep 2013 10:18 AM PDT A research team has found a breakthrough herbal medicine treatment for a common human fungal pathogen that lives in almost 80 percent of people. The team discovered a medicinal herb called Gymnema slyvestre is both nontoxic and blocks the virulence properties of a common fungus called Candida albicans.

Hate the sound of your voice? Not really Posted: 12 Sep 2013 08:27 AM PDT A new study finds people unknowingly find their own pre-recorded voice more attractive than others do.

Researchers hit virtual heads to make safer games Posted: 12 Sep 2013 08:18 AM PDT Two nearly identical softballs, both approved for league play, can have dramatically different effects when smacked into a player's head.

Brain atrophy linked with cognitive decline in diabetes Posted: 12 Sep 2013 06:38 AM PDT New research has shown that cognitive decline in people with type 2 diabetes is likely due to brain atrophy, or shrinkage, that resembles patterns seen in the early stages of Alzheimer's disease.

Novel vaccine reduces shedding of genital herpes virus Posted: 12 Sep 2013 06:37 AM PDT Sexually transmitted infection researchers have potentially reached a milestone in vaccine treatment for genital herpes, according to a report.

Everyday sadists take pleasure in others' pain Posted: 12 Sep 2013 06:37 AM PDT Most of the time, we try to avoid inflicting pain on others -- when we do hurt someone, we typically experience guilt, remorse, or other feelings of distress. But for some, cruelty can be pleasurable, even exciting. According to new research, this kind of everyday sadism is real and more common than we might think.

Forcing cancer to digest itself Posted: 12 Sep 2013 06:25 AM PDT When tumour cells no longer degrade themselves, cancer may develop. Using black skin cancer as an example, researchers have now shown that a protein plays an important role in the process of degradation of tumour cells. By reactivating this degradation therapeutically, tumours can be virtually forced to digest themselves.

New heart catheter on a U. S. patient for first time Posted: 12 Sep 2013 06:22 AM PDT Cardiovascular physicians have used the new IntellaTip MiFi™ XP catheter in a U.S. patient for the first time.

Codeine could increase users' sensitivity to pain Posted: 12 Sep 2013 06:22 AM PDT Using large and frequent doses of the pain-killer codeine may actually produce heightened sensitivity to pain, without the same level of relief offered by morphine, according to new research.

Guppy fish proven to be cheap, effective tool in fight against Dengue fever Posted: 12 Sep 2013 06:16 AM PDT Larvae-eating guppy fish can help combat the spread of dengue, a mosquito-borne illness giving rise to hundreds of thousands of severe cases including 20,000 deaths worldwide every year.

Testosterone deficiency not the only cause of changes with age in men Posted: 11 Sep 2013 03:47 PM PDT Just as the symptoms of menopause in women are attributed to a sharp drop in estrogen production, symptoms often seen in middle-aged men -- changes in body composition, energy, strength and sexual function -- are usually attributed to the less drastic decrease in testosterone production that typically occurs in the middle years. However, a new study finds that insufficient estrogen could be at least partially responsible for some of these symptoms.

Fat marker predicts cognitive decline in people with HIV Posted: 11 Sep 2013 03:44 PM PDT Scientists have found that levels of certain fats found in cerebral spinal fluid can predict which patients with HIV are more likely to become intellectually impaired.

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