It can take up to a year to determine the
function of a single gene, which has slowed efforts to develop new, more targeted drugs and vaccines.
Five to 10 years ago, the
sequencing of a single gene was often sufficient to get a scientist's work published in a prestigious journal.
The mutant rodents represent a rare
case of a single gene substantially influencing life span in mammals.
Users can enter the
name of a single gene or lists of many genes to retrieve drugs targeting those genes.
That pattern of inheritance would suggest the strong
effect of a single gene mutation, and it would most likely crop up in families that had a lot of shared genes through the intermarriage of first cousins.
Part of what makes them that way is the
mutation of a single gene called insulin - like growth factor 1 (IGF1), according to a group of researchers from the University of Utah, Cornell University, and the National Human Genome Research Institute.
«To our knowledge, our model is the first in which
expression of a single gene in postnatal hair cells results in hair cell survival and hearing preservation in mice that otherwise suffer from age - related and noise - induced hearing loss,» Dr. Chen said.
At the core of this cell behavior is how the
loss of that single gene changes activation levels of dozens of other genes, suppressing genes associated with metastatic disease and increasing activity of genes linked to normal tissue.
The unintended consequence
of a single gene change pale in comparison to the negative health consequences of the intensive inbreeding required to produce the extreme physical features of the fad breeds of today.
With the data provided by the FLI researchers, scientists around the world may now set targeted mutations to investigate the relevance
of single genes for aging, in order to better understand regulating mechanisms and, eventually, develop new approaches for therapy or prevention of aging - related diseases.
A massive genetics study relying on MRI brain scans and DNA samples from over 20,000 people has revealed what is claimed as the biggest effect yet
of a single gene on intelligence — although the effect is small.
An article in New Scientist (12 May 2012) explored the fact that a double mutation
of a single gene seems to have taken place about 2.5 million years ago, beginning the separation of homo from Australopithecus.
We know that in general this control of complex development processes takes place earlier than the
control of single genes, but I doubt whether we know any more about it now than we did when I first formulated it, around 1940.
The results of the study were obtained by infecting laboratory - grown cells with forms of the CMV virus which differed only by the
removal of a single gene.
According to study co-author Larry J. Young of Emory University, the results provide evidence in a comparatively simple animal model that changes in the activity
of a single gene profoundly can change a fundamental social behavior of animals within a species.
Results from a statistical analysis shows a cluster of SNPs — single nucleotide polymorphisms — in one
section of a single gene, indicating the location of a mutation likely linked to autism.
«For species that have a very rapidly changing environment, this process of
co-option of single genes may be fairly important.
The study, published in Nature Genetics, offers the possibility that targeting these processes,
instead of single genes, may provide new opportunities for treatment of Wilms tumor.
And although doctors use genetic screening to identify
versions of single genes known to cause diseases like cystic fibrosis, other conditions such as blindness can be caused by mutations in many genes.
Now, a study led by a researcher at the Salk Institute has found that
variants of a single gene can largely determine a plant's ability to thrive in environments where iron is scarce.
«So, the flexibility of yeast cells does not arise from the activity or
inactivity of a single gene,» project head at ISB, Dr. Aimée Dudley, explains.
Changing the epigenetic
code of a single gene is enough to cause a healthy breast cell to begin a chain reaction and become abnormal, according to research by Queen Mary University of London (QMUL).
But an alternative explanation is that inheriting recessive
copies of a single gene from both parents often, but not always, causes the disorder.
While his previous method relied almost entirely on small molecules, it still included a minute amount of genetic manipulation; that is, he often required the
use of a single gene to enhance his chemical cocktails.
Systems biology uses a variety of omics tools including genomics, bioinformatics, metabolomics and proteomics to understand biology at a high level of complexity, such as how mutation or loss
of a single gene affects cells, tissues and even the entire organism.
Conditional expression of hairpin constructs in Drosophila is a powerful method to disrupt the activity
of single genes with a spatial and temporal resolution that is impossible, or exceedingly difficult, using classical genetic methods.
By getting back to basics, they reasoned, scientists might stand a chance of actually understanding the
purpose of every single gene in a living cell.
Such models aim to elucidate the
contribution of single genes for protection against mutations, genomic instability, ageing and ageing related diseases such as cancer.
There is ample evidence of the harm done by popular sire breeding and doing so based on the
status of a single gene is especially risky.
That view of eukaryote evolution based on
analysis of a single gene «was in textbooks, and it was what many people had made their careers on,» he says.
The transition from basic research to the commercialisation of scientific ideas and discoveries is not an obvious one for those who have spent years in a university lab investigating the
function of a single gene or a particular step in a biochemical pathway.