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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).

Genes may be responsible for obsessive-compulsive disorder

Obsessive-compulsive disorder tends to run in families, causing members of several generations to experience severe anxiety and disturbing thoughts that they ease by repeating certain behaviors.

26 Jul 2006

New insights into how cells repair damaged DNA

Cancer researchers have discovered that a recently identified protein critical for repairing damaged genes uses an unusual mechanism to keep its repairs accurate.

26 Jul 2006

Using gamma radiation preserves T-cell responses in bacterial vaccine

Using gamma radiation to inactivate bacteria for the preparation of vaccines, instead of traditional heat or chemical methods of inactivation, appears to create a vaccine that is more effective than so-called "killed" vaccines against disease, and has the added advantage of a longer storage life than "live" vaccines.

26 Jul 2006

Heat sensitivity may make testicular cancer cells more susceptible to standard treatments and die off more readily

Experts at Johns Hopkins have linked scientific evidence spanning more than 30 years to suggest an explanation for why testicular cancer patients like seven-time Tour de France winner Lance Armstrong survive far better than patients with other advanced cancers.

26 Jul 2006

Disease-specific gene expression profiles in patients with rheumatoid arthritis

They sleep together, eat together, and most people find it impossible to tell them apart. Identical twins who grow up together share just about everything, including their genes.

26 Jul 2006

Irradiation preserves T-Cell responses in bacterial vaccine

Findings could result in more potent vaccines that are relatively inexpensive to produce, easy to store, and that can be transported without refrigeration.

25 Jul 2006

Naltrexone may increase the urge to drink

Naltrexone (NTX) is able to reduce drinking and craving among many alcoholics and heavy drinkers, but not all of them.

25 Jul 2006

Genetic link to community makeup and ecosystem evolution

Genes of one organism not only control the characteristics of that individual but also dictate the behavior of thousands of other organisms in a community.

25 Jul 2006

Which came first, nucleic acids or proteins?

Which came first, nucleic acids or proteins? This question is molecular biology's version of the "chicken-or-the-egg" riddle.

24 Jul 2006

First complete kit for whole genome amplification and labeling

Kreatech Biotechnology BV has announced the launch of the "Genome-pULSe, arrayCGH Whole Genome Amplification and Labeling Kit" the latest addition to their product portfolio for arrayCGH analysis.

24 Jul 2006

Active mind and body slows Alzheimer's progression

Researchers have uncovered the pathways behind the protection offered by environmental stimulation in Alzheimer's disease, further confirming that enhanced mental and physical activity slows neurological decline.

24 Jul 2006

Digital magnetofluidics holds hope for better medicine

Critical advances in medicine and environmental protection promise to emerge from a new method for biochemical analysis of fluids developed by an international science team led in part by Arizona State University researchers.

21 Jul 2006

Link between cell's energy use and genome health discovered

While studying how a cell keeps its genetic material intact, scientists at Johns Hopkins got busy alternately knocking out two catalysts vital to managing a yeast cell's energy.

21 Jul 2006

Gene variant increases risk of type 2 diabetes - but healthy lifestyle changes reduce genetic risk

Researchers have confirmed that a gene variant confers susceptibility to type 2 diabetes in participants of the Diabetes Prevention Program (DPP), a large clinical trial in adults at increased risk for developing type 2 diabetes.

21 Jul 2006

Latest sequencing targets for NHGRI

The National Human Genome Research Institute (NHGRI) has announced several new sequencing targets including the Northern white-cheeked gibbon (Nomascus leucogenys).

19 Jul 2006

Study indicates heart damage from some cancer drugs worsens over the years

It is well documented that some anti-cancer drugs can damage the heart, but a long-term follow-up of children and young adults who had doxorubicin[1] treatment for bone tumours suggests that the damage gets progressively worse as the years go on.

19 Jul 2006

New role discovered for breast cancer susceptibility gene BRCA1

A recently discovered facet of the breast cancer susceptibility gene BRCA1 reveals a mechanism linking mutation of BRCA1 to formation of large blood vessels needed to support cancer progression.

18 Jul 2006

An accurate model of p53 tumor suppressor protein bound to DNA for anti-cancer activity

More than half of human cancers involve mutations in the p53 tumor-suppressor gene, suggesting the critical role played by the normal p53 protein in defending against cancer.

18 Jul 2006

New genetic clues to dementia with Lewy bodies

Researchers have found that genetic alterations originally identified in people suffering from a rare disease may also be an important risk factor for the second most common form of dementia among the elderly.

17 Jul 2006

Scientists develop piezoresponse force microscopy

A seminal early event in the history of nanotechnology was the development of the atomic force microscope (AFM), which used a nanoscale cantilever to image solid materials at the atomic level.

17 Jul 2006