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Vitamin B3 Might Have Been Made in Space, Delivered to Earth by Meteorites

April 18, 2014 | Comments

Ancient Earth might have had an extraterrestrial supply of vitamin B3 delivered by carbon-rich meteorites, according to a new analysis by NASA-funded researchers. The result supports a theory that the origin of life may have been assisted by a supply of key molecules created in space and brought to Earth by comet and meteor impacts.

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Deadly Human Pathogen Cryptococcus Fully Sequenced

April 18, 2014 12:36 pm | Comments

Researchers have sequenced the entire genome and all the RNA products of the most important pathogenic lineage of Cryptococcus neoformans, a strain called H99.                           

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Researchers Develop New Model of Cellular Movement

April 18, 2014 12:27 pm | Comments

Cell movement plays an important role in a host of biological functions from embryonic development to repairing wounded tissue. A new study deepens the understanding of a pair of proteins– vinculin and actin– that work together to allow a cell to migrate throughout the body. 

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Chronic Inflammation May Be Linked to Aggressive Prostate Cancer

April 18, 2014 12:11 pm | Comments

The presence of chronic inflammation in benign prostate tissue was associated with high-grade, or aggressive, prostate cancer, and this association was found even in those with low prostate-specific antigen (PSA) levels, according to a new study.

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Lost Stem Cells Naturally Replaced by Non-stem Cells

April 18, 2014 11:58 am | Comments

Researchers have discovered an unexpected phenomenon in the organs that produce sperm in fruit flies: when a certain kind of stem cell is killed off experimentally, another group of non-stem cells can come out of retirement to replace them.   

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Scientists Develop 'Playbook' for Reverse Engineering Tissue

April 17, 2014 2:13 pm | Comments

In a feat of reverse tissue engineering, Stanford University researchers have begun to unravel the complex genetic coding that allows embryonic cells to proliferate and transform into all of the specialized cells that perform myriad biological tasks.

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Some Immune Cells Defend Only One Organ

April 17, 2014 1:52 pm | Comments

Scientists have uncovered a new way the immune system may fight cancers and viral infections. The finding could aid efforts to use immune cells to treat illness. The research, in mice, suggests that some organs have the immunological equivalent of “neighborhood police” – specialized squads of defenders that patrol only one area, a single organ, instead of an entire city, the body.

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FDA warns of risks with fibroid removal procedure

April 17, 2014 1:22 pm | by The Associated Press | Comments

The Food and Drug Administration is warning women that a device-assisted procedure for treating growths in the uterus could inadvertently spread cancer to other parts of the body. The agency is discouraging doctors from performing the procedure, which uses an electronically powered device to...

Scientists Explain How Memories Stick Together

April 17, 2014 12:46 pm | Comments

Scientists have created a new model of memory that explains how neurons retain select memories a few hours after an event. This new framework provides a more complete picture of how memory works, which can inform research into disorders liked Parkinson's and Alzheimer's.

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Spate of Mideast virus infections raises concerns

April 17, 2014 12:23 pm | by Adam Schreck - Associated Press - Associated Press | Comments

DUBAI, United Arab Emirates (AP) — A recent spate of infections from a frequently deadly Middle East virus is raising new worries about efforts to contain the illness, with infectious disease experts urging greater vigilance in combatting its spread. More than 20 people, many of them health-care...

Groundbreaking MRI Scan Shows Brown Fat in Tissues

April 17, 2014 12:22 pm | Comments

Researchers used an MRI-based method to identify and confirm the presence of brown adipose tissue in a living adult, which could prove to be an essential step towards a new wave of therapies to aid the fight against diabetes and obesity.   

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Ebola Virus in Africa Outbreak is New Strain

April 16, 2014 5:21 pm | by Marilynn Marchione - AP Chief Medical Writer | Comments

The Ebola virus that has killed scores of people in Guinea this year is a new strain - evidence that the disease did not spread there from outbreaks in some other African nations, scientists report.               

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Study: Diabetic heart attacks and strokes falling

April 16, 2014 5:21 pm | by Mike Stobbe - AP Medical Writer - Associated Press | Comments

In the midst of the diabetes epidemic, a glimmer of good news: Heart attacks, strokes and other complications from the disease are plummeting. Over the last two decades, the rates of heart attacks and strokes among diabetics fell by more than 60 percent, a new federal study shows. The research...

Teenage Concussions Linked to Higher Rates of Suicide Attempts

April 16, 2014 2:04 pm | Comments

Teenagers who have suffered a traumatic brain injury such as a concussion are at “significantly greater odds” of attempting suicide, being bullied and engaging in a variety of high risk behaviors, a new study has found.          

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Diabetes Cases Nearly Doubled Over Past Two Decades

April 16, 2014 1:52 pm | Comments

Cases of diabetes and pre-diabetes in the United States have nearly doubled since 1988, suggests new research, with obesity apparently to blame for the surge.                           

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Diverse Gene Pool Critical for Tigers' Survival

April 16, 2014 1:43 pm | Comments

New research by Stanford scholars shows that increasing genetic diversity among the 3,000 or so tigers left on the planet is the key to their survival as a species. Wild tigers' historical range has been reduced by more than 90 percent. But conservation plans that focus only on increasing numbers and preserving distinct subspecies ignore genetic diversity, according to the study. Under that approach, the tiger could vanish entirely.

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