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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).

NZ Research helps difficult pregnancies

Before the 1960's knowledge of the intrauterine environment was like a black box, limiting clinical understanding, and monitoring of the fetus during pregnancy. Little was known about the fetus until after birth happened. Now that has changed dramatically, and there have been revolutionary advances, particularly in the last 20 years enabling clinicians to diagnose and treat problems which develop in the womb.

13 Apr 2004

New tool for study of carbohydrates could aid drug research

While many dieters are trying to cut carbs, a University of New Hampshire (UNH) biochemist has invented a way to capture them so scientists can more easily study their structure.

13 Apr 2004

CT colonography lacks the sensitivity of conventional colonoscopy

A new study published in JAMA on CT colonography or 'virtual' colonoscopy using 2-D imaging finds that this test lacks the sensitivity and specificity of conventional colonoscopy for colorectal cancer screening. Study co-author and American College of Gastroenterology President Douglas K. Rex, M.D. is available for interviews.

13 Apr 2004

Researchers have developed a new method for finding antigens

Researchers at National Jewish Medical and Research Center have developed a method for finding the molecular targets of the immune system, known as antigens.

13 Apr 2004

Protein sequences harder to predict than originally thought

Scientists have believed for decades that the sequencing of the human genome would automatically yield the sequences of proteins, the functional products of genes, and thus lead to the unraveling of the mechanisms behind human cell biology and disease.

12 Apr 2004

Researchers isolate gene responsible for Chron's disease

Crohn's disease is an inflammatory bowel disease and its prevalence is increasing in industrialized nations. Existing treatments are considered unsatisfactory, often requiring recurring hospitalization and surgeries.

12 Apr 2004

Study suggests ways to prevent prostate cancer

Current information on prostate cancer risk factors suggests that some cases might be prevented. One possible risk factor that can be changed is diet. You may be able to reduce your risk of prostate cancer by changing the way you eat.

11 Apr 2004

DNA free radical damage research

Certain prostate cancer cell lines are unable to repair DNA damage caused by "free radicals," according to scientists at the National Institute of Standards and Technology (NIST) and National Institutes of Health (NIH). This type of damage has been implicated before in the development of prostate cancer, but the new research provides the first solid evidence that the normal repair process is altered in prostate cancer cells, possibly leading to a cascade of events that culminate in further DNA damage and cellular dysfunction.

9 Apr 2004

Magnetic tweezers that can manipulate strands of DNA

An array of magnetic traps designed for manipulating individual biomolecules and measuring the ultrasmall forces that affect their behavior has been demonstrated by scientists at the National Institute of Standards and Technology (NIST).

9 Apr 2004

New microgel could potentially recover any enzyme and save manufacturers considerable money

Carnegie Mellon University scientists have employed biological molecules to create a microgel that could recover costly enzymes for repeated use in catalyzing commercially important reactions. The microgel could potentially recover any enzyme and theoretically save manufacturers considerable money.

8 Apr 2004

Genetic trick makes gene therapy vectors more versatile

A genetic trick used by viruses to replicate themselves has been adapted for laboratory use to build complex protein structures required by immune system cells, according to investigators at St. Jude Children’s Research Hospital.

7 Apr 2004

Molecular analyses of leukemia patients suggest strategies for better treatments

The cure rate for pediatric acute lymphoblastic leukemia (ALL) might continue to rise with improved use of conventional therapies. But even more effective and less toxic therapies based on genetic and pharmacogenetic studies might one day push the success rate close to 100 percent, according to an article published by investigators at St. Jude Children’s Research Hospital in the April 8 issue of the New England Journal of Medicine.

7 Apr 2004

Completion of the sequencing of human chromosome 19

The United States Department of Energy (DOE) Joint Genome Institute (JGI) and Stanford University report today the completion of the sequencing of human chromosome 19, the most gene-rich of all the human chromosomes. This achievement is described in the April 1, 2004 edition of the journal Nature.

7 Apr 2004

Scientists studying vaccinia virus, a relative of smallpox, have determined that a gene necessary for virus replication also has a key role in turning off inflammation

Scientists at the University of Illinois at Urbana-Champaign studying vaccinia virus, a close relative of smallpox, have determined that a gene necessary for virus replication also has a key role in turning off inflammation, a crucial anti-viral immune response of host cells.

6 Apr 2004

Genetic cause of cancer identified as a defect in the function of otherwise normal genes

In a landmark study published today in Nature Genetics, researchers from St Vincent's Hospital, The Victor Chang Cardiac Research Institute and the University of New South Wales have shown that a possible cause of cancer is a defect in the function of otherwise normal genes.

6 Apr 2004

The National Cancer Institute has awarded USC scientists $3.5 million for a study of the enzyme that faithfully copies our genetic information

The National Cancer Institute has awarded USC scientists $3.5 million for a study of the enzyme that faithfully copies our genetic information, enabling it to pass from one generation to the next. The grant will fund structural, biochemical and computer studies designed to reveal how the enzyme, DNA polymerase, makes so few mistakes.

5 Apr 2004

T-cells in lupus patients avoid apoptosis and are stimulated to produce antibodies against the patients own DNA

Researchers studying autoimmune diseases have found a molecular mechanism that explains how T-cells in lupus patients avoid apoptosis and are stimulated to produce antibodies against the patients own DNA.

1 Apr 2004

SARS virus vaccine stimulates protective immune response

An experimental vaccine prevents the SARS virus from replicating in laboratory mice, according to a new report in the April 1 issue of Nature. Scientists at the Vaccine Research Center (VRC) of the National Institute of Allergy and Infectious Diseases (NIAID), one of the National Institutes of Health, developed the vaccine. The vaccine was tested in a mouse model of SARS infection recently validated by other NIAID investigators.

31 Mar 2004

Gene-rich human Chromosome 19 sequence completed

31 Mar 2004

Research team has found a new way to streamline gene isolation to determine their functions

A single strand of plant or animal DNA may contain tens of thousands of genes, each programmed to produce a specific protein essential for the growth or survival of the organism. The challenge for geneticists is to isolate individual genes and determine their function -- a painstaking process often requiring years of laboratory trial and error.

31 Mar 2004