DNA News and Research

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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 molecular insights may one day lead to opportunities to stave off old age

Delving deep into the molecular subtleties of a strain of mice engineered to age rapidly, scientists have found that an accumulation of genetic mutations prompts a cascade of programmed cell death that seems to underpin the aging process.

18 Jul 2005

NIPA levels act as switch regulating cell division

Cells control mitosis (cell division) by assembling a biochemical switch to block it or by disassembling the switch to trigger it, according to investigators at St. Jude Children's Research Hospital and the Technical University of Munich.

18 Jul 2005

Individuals with inactive heterozygous ALDH2, a tendency to alcohol flushing have a greater susceptibility to hangovers

Alcohol consumption is an integral part of the Japanese business culture. Hangovers, however, can have substantial economic drawbacks.

17 Jul 2005

Having asthma, hay fever or another allergic condition may reduce the risk of developing Glioblastoma multiforme

Glioblastoma multiforme (GBM) affects three out of 100,000 people, a rate that quadruples to 13 out 100,000 among people who are 65 and older. The average five-year survival rate from the time of diagnosis for GBM is only 3.3 percent, and is lower for people 65 and older.

15 Jul 2005

Single mutation in a human sodium channel gene can trigger pain in people with primary erythromelalgia

Yale School of Medicine researchers report the first demonstration that a single mutation in a human sodium channel gene can trigger pain in people with an inherited pain syndrome known as primary erythromelalgia, according to a study published this month in the journal Brain.

13 Jul 2005

New search method could aid in the discovery of biomarkers for breast cancer

Using a super-efficient method they invented to search for a type of cancer-related change in all genes of a cell, Dana-Farber Cancer Institute researchers have discovered new evidence about how the "microenvironment" of breast cancers helps drive the cancers' growth and migration.

13 Jul 2005

Scientists have identified the first reported case in Asia of primate-to-human transmission of simian foamy virus

...a retrovirus found in macaques and other primates that so far has not been shown to cause disease in humans.

13 Jul 2005

New method may accelerate the way cancer-causing genes are found

Researchers at the University of Minnesota Cancer Center and the National Cancer Institute (NCI) have discovered a new method that could accelerate the way cancer-causing genes are found and could lead to a more accurate identification of the genes, according to two studies in the July 14, 2005, issue of Nature.

13 Jul 2005

Researchers modify software to predict gene transcription

A modification to an "ace" gene prediction program by computer scientists at Washington University in St. Louis now enables scientists to predict the very beginnings of gene transcription start sites and where the first splice occurs thereby defining the first exon of the gene.

13 Jul 2005

Researchers have pinpointed specific gene and protein over-production in metastatic melanoma

Gene amplification is a process that often happens in cancer cells when the normal DNA replication process is altered, causing many copies of the gene to be produced instead of a single copy of a region of a chromosome.

12 Jul 2005

Keap1 protein - a promising new target for drugs to fight many different kinds of cancer

Researchers at the University of Illinois at Chicago are unraveling the biochemical mechanism by which functional foods combat cancer.

11 Jul 2005

Identical twins lose some fundamental similarities as they grow older

...a new study reports. They may start to look and act less alike. The changes could leave one twin susceptible to diseases like cancer, while the other twin remains healthy.

11 Jul 2005

Scientists discover how an HIV protein fragment shuts down an immune response

The HIV virus hides out in the very immune system cells that are meant to protect the body from viral infection. But how does it prevent these cells from mounting a full-scale attack against the invader?

11 Jul 2005

Patients suffering from oral cancer have increased levels of certain bacteria in their saliva

Six common species of bacteria were found at significantly higher levels in the saliva of patients with oral squamous cell carcinoma (OSCC) than in the saliva of healthy individuals.

6 Jul 2005

Study is the first to show that there are mechanisms in place for the immune system to identify cancer cells

A study undertaken by biologists at the University of California, Berkeley, has found that damage to a cell's DNA sets off a chain reaction that leads to the increased expression of a marker recognized by the body's immune system.

6 Jul 2005

DNA imaging suggests where lung cancer genes may reside

With equipment designed to probe the smallest segments of the genetic code, researchers at Dana-Farber Cancer Institute and collaborating institutions have found sections of the chromosomes of lung cancer cells where cancer-related genes may lurk.

4 Jul 2005

Protein that was thought to simply turn genes on and off now looks to be more like a cellular dimmer switch

The scientists showed for the first time that when certain parts of a protein molecule are modified - flexible, randomly structured regions believed to be only minor players in the protein world - they become important in turning genes on and off, but in a way that resembles a dimmer switch rather than an on-off switch.

30 Jun 2005

Map of gene control regions provides tool for understanding cells' different roles

In another step to decipher information in the human genome, scientists have discovered the location and sequence of over 10,000 DNA regions that function as genetic on-off switches, or "promoters" in human fibroblasts.

29 Jun 2005

A new method for manipulating macromolecules

The technique uses double-stranded DNA to direct the behavior of other molecules. In previous DNA nanotechnology efforts, duplex DNA has been used as a static lattice to construct geometrical objects in three dimensions.

29 Jun 2005

Study causes big shift in how we think about p53 gene

The cellular cascade of molecular signals that instructs cells with fatally damaged DNA to self-destruct pivots on the p53 tumor suppressor gene. If p53 is inactivated, as it is in over half of all human cancers, checks and balances on cell growth fail to operate, and body cells start to accumulate mutations, which ultimately may lead to cancer.

27 Jun 2005

DNA News and Research

Further Reading

New molecular insights may one day lead to opportunities to stave off old age

NIPA levels act as switch regulating cell division

Individuals with inactive heterozygous ALDH2, a tendency to alcohol flushing have a greater susceptibility to hangovers

Having asthma, hay fever or another allergic condition may reduce the risk of developing Glioblastoma multiforme

Single mutation in a human sodium channel gene can trigger pain in people with primary erythromelalgia

New search method could aid in the discovery of biomarkers for breast cancer

Scientists have identified the first reported case in Asia of primate-to-human transmission of simian foamy virus

New method may accelerate the way cancer-causing genes are found

Researchers modify software to predict gene transcription

Researchers have pinpointed specific gene and protein over-production in metastatic melanoma

Keap1 protein - a promising new target for drugs to fight many different kinds of cancer

Identical twins lose some fundamental similarities as they grow older

Scientists discover how an HIV protein fragment shuts down an immune response

Patients suffering from oral cancer have increased levels of certain bacteria in their saliva

Study is the first to show that there are mechanisms in place for the immune system to identify cancer cells

DNA imaging suggests where lung cancer genes may reside

Protein that was thought to simply turn genes on and off now looks to be more like a cellular dimmer switch

Map of gene control regions provides tool for understanding cells' different roles

A new method for manipulating macromolecules

Study causes big shift in how we think about p53 gene

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