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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 methods for studying DNA repair and protein modification

This month's issue of Cold Spring Harbor Protocols features two articles detailing experimental methods for the analysis of molecular processes involved in DNA repair and post-translational modification of proteins.

5 Jan 2009

Antibodies take 'evolutionary leaps' to fight microbes

With cold and flu season in full swing, the fact that viruses and bacteria rapidly evolve is apparent with every sneeze, sniffle, and cough.

5 Jan 2009

Collagen VI protects brain cells against amyloid-beta proteins

Scientists from the Gladstone Institute of Neurological Disease (GIND), UCSF, and Stanford have discovered that a certain type of collagen, collagen VI, protects brain cells against amyloid-beta proteins, which are widely thought to cause Alzheimer's disease (AD).

5 Jan 2009

Researchers show mechanisms that regulate DNA damage control and replication

Scientists at Burnham Institute for Medical Research (Burnham) have demonstrated important new roles for the protein kinase complex Cdc7/Dbf4 or Cdc7/Drf1 (Ddk) in monitoring damage control during DNA replication and reinitiating replication following DNA repair.

5 Jan 2009

Discovery of new syndrome associated with severe congenital neutropenia

A team of scientists has discovered a new syndrome associated with severe congenital neutropenia (SCN), a rare disorder in which children lack sufficient infection-fighting white cells, and identified the genetic cause of the syndrome: mutations in the gene Glucose-6-phosphatase, catalytic subunit 3 (G6PC3).

5 Jan 2009

Discovery of new genetic markers for ulcerative colitis

An international team led by University of Pittsburgh School of Medicine researchers has identified genetic markers associated with risk for ulcerative colitis.

5 Jan 2009

Neuropeptide Y gene variation may lead to early coronary artery disease

Researchers from Duke University Medical Center have identified a variation in a particular gene that increases susceptibility to early coronary artery disease.

5 Jan 2009

Culprit found in rare type of baldness

Scientists in Beijing say they have discovered a genetic cause for a certain type of premature baldness and they suggest their discovery offers hope in future that those who inherit this rare type of baldness will eventually be able to keep their hair.

5 Jan 2009

Discovery of potential important pathway for controlling cell loss and survival in Parkinson's disease

Neurologists have observed for decades that Lewy bodies, clumps of aggregated proteins inside cells, appear in the brains of patients with Parkinson's disease and other neurodegenerative diseases.

1 Jan 2009

Researchers use nanoparticles to make 3-D DNA nanotubes

Arizona State University researchers Hao Yan and Yan Liu imagine and assemble intricate structures on a scale almost unfathomably small.

1 Jan 2009

New understanding of genetic signature associated with Alzheimer's disease

Scientists have new information about the complex genetic signature associated with Alzheimer's disease, the leading cause of cognitive decline and dementia in the elderly.

1 Jan 2009

In lung cancer, silencing one crucial gene disrupts normal functioning of genome

While examining patterns of DNA modification in lung cancer, a team of international researchers has discovered what they say is a surprising new mechanism.

1 Jan 2009

Gold particles and infrared light for controlled drug delivery

Using tiny gold particles and infrared light, MIT researchers have developed a drug-delivery system that allows multiple drugs to be released in a controlled fashion.

1 Jan 2009

Few DNA repair gene variants associated with increased cancer risk

Variants of numerous DNA repair genes initially appeared to be statistically significantly associated with cancer risk in epidemiological studies.

1 Jan 2009

Researchers identify clockwork that drives a powerful virus nanomotor

Peering at structures only atoms across, researchers have identified the clockwork that drives a powerful virus nanomotor.

30 Dec 2008

Researchers identify common gene variant linked to high blood pressure

Researchers at the University of Maryland School of Medicine have identified a common gene variant that appears to influence people's risk of developing high blood pressure, according to the results of a study being published online Dec. 29, 2008 in the Proceedings of the National Academy of Sciences (PNAS).

30 Dec 2008

Targeted nanoparticles deliver therapeutic DNA to cancer cells

Given that cancer is a disease caused by gene mutations, cancer researchers have been striving to develop gene therapies aimed at correcting these mutations. However, these efforts have been hobbled by the difficulty in safely and efficiently delivering anticancer genes to tumors. Nanoparticles, however, may solve these delivery issues, and two recently published studies, using two different types of nanoparticles, lend credence to that hypothesis.

29 Dec 2008