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DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).

New understanding of blinding degenerative eye conditions

Though based on mouse studies, the research bolsters the idea that humans suffering from these and other eye conditions may be able to help preserve function by adding antioxidants to their diet, and explains why this would work.

8 Feb 2009

Scientists create first crystal structure of an intermediate particle in virus assembly

The structure, described February 8 in an advance online publication of the journal Nature , provides fresh insights into the elegant dance that viral proteins perform to create the infectious structure that causes all manner of misery and disease, say researchers.

8 Feb 2009

New genes involved in acute lymphoblastic leukemia play fundamental role in prognosis of the disease

The inactivity or "silence" of certain genes plays a fundamental role in the prognosis of acute lymphoblastic leukemia as well as in response to treatment, according to the results of research involving a team made up of specialists from the University Hospital of Navarra and the Center for Applied Medical Research at the same University of Navarra, as well as the Reina Sofía Hospital in Cordoba, Andalusia.

8 Feb 2009

Long-sought protein structure may help reveal how 'gene switch' works

The bacterium behind one of mankind's deadliest scourges, tuberculosis, is helping researchers at the Commerce Department's National Institute of Standards and Technology (NIST) and the Department of Energy's Brookhaven National Laboratory (BNL) move closer to answering the decades-old question of what controls the switching on and off of genes that carry out all of life's functions.

8 Feb 2009

Study identifies gene variants associated with early-onset myocardial infarction

The largest study ever completed of genetic factors associated with heart attacks has identified nine genetic regions - three not previously described - that appear to increase the risk for early-onset myocardial infarction.

8 Feb 2009

Discovery of direct link between vitamin D and MS susceptibility 'gene'

Researchers have found evidence that a direct interaction between vitamin D and a common genetic variant alters the risk of developing multiple sclerosis (MS).

8 Feb 2009

FDA approves orphan drug ATryn anticoagulant

The U.S. Food and Drug Administration has issued its first approval for a biological product produced by genetically engineered (GE) animals.

8 Feb 2009

Emphysema linked to accelerated aging protein

A University of Iowa study is apparently the first to make a connection between a rare, hereditary premature aging disease and cell damage that comes from smoking.

8 Feb 2009

Extra copies of LIS1 gene carry extra risk

Is more of a good thing better? A gene known as LIS1 is crucial for ensuring the proper placement of neurons in the developing brain.

5 Feb 2009

Researchers uncover serotonin transporter gene SLC6A4's role in severity of drinking

New research from the University of Virginia Health System could help explain why some alcoholics are more severe drinkers than others.

5 Feb 2009

Source of cancer stem cells' resistance to radiation discovered

Much to the dismay of patients and physicians, cancer stem cells - tiny powerhouses that generate and maintain tumor growth in many types of cancers - are relatively resistant to the ionizing radiation often used as therapy for these conditions.

5 Feb 2009

Sangamo BioSciences starts trial of CCR5-ZFP therapeutic to treat HIV/AIDS

Sangamo BioSciences, Inc. has announced that its collaborators at the University of Pennsylvania have opened a Phase 1 clinical trial to evaluate SB-728-T for the treatment of HIV/AIDS.

5 Feb 2009

New research may lead to new pharmacologic approaches to treating obesity

Scientists at the University of North Carolina at Chapel Hill School of Medicine have discovered a gene that when mutated causes obesity by dampening the body's ability to burn energy while leaving appetite unaffected.

5 Feb 2009

Scientists discover missing link in the way cells protect themselves against cancer

Cancer Research UK scientists have discovered a missing link in the way cells protect themselves against cancer, according to research published in Genes & Development.

5 Feb 2009

What your mother did when she was a child may have an effect on your memory

A new study by researchers from Rush University Medical Center and Tufts University School of Medicine using mice indicate that a child's memory and the severity of learning disorders may be affected by what his or her mother did when she was a child.

3 Feb 2009

Exposure to second-hand smoke and alcohol significantly raises the risk of liver disease

The finding adds to mounting evidence that tobacco smoke and alcohol are worse for health as a combination, beyond the individual exposure risks, said Shannon Bailey, Ph.D., an associate professor in the UAB Department of Environmental Health Sciences and a co-lead author on the study.

3 Feb 2009

Gene-targeting approach for herpes treatment

A new therapy being developed at the University of Florida could, in time, produce another weapon for the fight against herpes.

3 Feb 2009

NRL partners with industry to develop compact biosensor for wide-ranging applications

Scientists at the Naval Research Laboratory (NRL) are partnering with industry to develop a sensor system for biomolecules that could make a significant contribution to a variety of fields such as healthcare, veterinary diagnostics, food safety, environmental testing, and national security.

3 Feb 2009

FOXO3A gene variation may be key to longer life

A variation in the gene FOXO3A has a positive effect on the life expectancy of humans, and is found much more often in people living to 100 and beyond - moreover, this appears to be true worldwide.

3 Feb 2009