الاثنين، 2 يوليو 2012

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News


Secrets of lung cancer drug resistance revealed

Posted: 01 Jul 2012 05:21 PM PDT

People with lung cancer who are treated with the drug Tarceva face a daunting uncertainty: although their tumors may initially shrink, it's not a question of whether their cancer will return -— it's a question of when. And for far too many, it happens far too soon.

Sleep deprivation effect on the immune system mirrors physical stress

Posted: 01 Jul 2012 04:16 PM PDT

Severe sleep loss jolts the immune system into action, reflecting the same type of immediate response shown during exposure to stress, a new study reports. Researchers compared the white blood cell counts of 15 healthy young men under normal and severely sleep-deprived conditions. The greatest changes were seen in the white blood cells known as granulocytes, which showed a loss of day-night rhythmicity, along with increased numbers, particularly at night.

Scientists develop alternative to gene therapy

Posted: 01 Jul 2012 04:16 PM PDT

Scientists have discovered a surprisingly simple and safe method to disrupt specific genes within cells. The scientists highlighted the medical potential of the new technique by demonstrating its use as a safer alternative to an experimental gene therapy against HIV infection.

Why chronic pain is all in your head: Early brain changes predict which patients develop chronic pain

Posted: 01 Jul 2012 04:16 PM PDT

Why do some people with similar injuries end up with chronic pain while others recover and are pain free? The first longitudinal brain imaging study to track participants with a new back injury shows that the more two sections of the brain related to emotional and motivational behavior communicate, the greater likelihood a patient will develop chronic pain. Researchers were able to predict, at the beginning of the study, which participants would go on to develop chronic pain based on the level of brain interaction.

Key step in immune system-fueled inflammation discovered

Posted: 01 Jul 2012 04:15 PM PDT

Like detectives seeking footprints and other clues on a television "whodunit," science can also benefit from analyzing the tracks of important players in the body's molecular landscape. Scientists have done just that and illuminated a key step in the journey of inflammation-producing immune cells. The finding provides powerful, previously unknown information about critical biological mechanisms underlying heart disease and many other disorders.

Beyond base-pairs: Mapping the functional genome

Posted: 01 Jul 2012 04:15 PM PDT

Researchers have now mapped, for the first time, a significant portion of the functional sequences of the mouse genome, the most widely used mammalian model organism in biomedical research.

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