Tag: "factors" at biology news
Parting genomes: UA biologists discover seeds of speciation
...," Reed said. "It just happens to be that whatever factors
are causing sterility are at higher frequencies in the Catalina Island population." Further experiments demonstrated that the sterility trait is caused by more than one genetic change. "I think there are many genes--4 or 5 probably, maybe many more,"...
Common worm provides insights into salmonella virulence
...rm, known as Caenorhabditis elegans. The virulence factors
-- injected into the host cells by Salmonella -- a...he remarkable overlap between Salmonella virulence factors
required for pathogenesis in mammals and worms. For their experiments, the team used the C. elegans-...
Carnegie Mellon U biologists identify critical player in yeast ribosome assembly
...eration. "We think that specific ribosome assembly factors
we discovered might have a second 'moonlighting' job," said Woolford. "Thus, if such a protein functions in both ribosome assembly and growth regulation, cells could coordinate these two processes by 'talking' to the same molecule in two places." In...
Obesity and hypertension: Two epidemics or one?
...strate a clustering of coronary heart disease risk factors
(i.e., the Metabolic Syndrome). Heretofore, medica...esponse to weight gain remain unclear, but genetic factors
may contribute. In addition, inter-individual variability in visceral fat accumulation with weight g...
Loss of circadian genes results in epilepsy
...seizures when the other two PAR bZip transcription factors
are also lacking. Further work by Dr. Sch...ression is regulated by the PAR bZip transcription factors
in both the liver and the brain. Furthermore, Pdxk expression is abnormally low in the brains of PAR...
Study links diabetes and colorectal cancer
...ncer independently of diabetes and such other risk factors
as obesity and cigarette smoking and do so at concentrations below those commonly accepted as the standard for a diagnosis of diabetes. For every one percent increase in glycated hemoglobin there was a corresponding 33 percent increase in risk acros...
Junk DNA yields new kind of gene
...lymerase, TATA binding protein and a host of other factors
associated with active transcription, will not be ...nducted a series of experiments and found that the factors
were all present and active, and they were located just upstream of the SER3 promoter-as was a jot o...
When blood can't get to brain, special CT scan helps
...ct in the evaluation of certain patients with risk factors
for stroke, especially those critical patients in whom an expeditious decision is needed," says co-author Gregory Thompson, M.D., an associate professor in the U-M Department of Neurosurgery. "I think it will become increasingly useful because it's e...
Cell growth and death controlled by single pathway in lymphoma cancer model
...nfection by this bacterium is one of the main risk factors
for developing gastric cancer, the world's second most common cancer. In some people with chronic H. pylori infection, the immune cells that respond to the infection acquire genetic changes, called chromosomal translocations, which produce MALT lymph...
Could mice hold the secret to longer life?
...ive mice were examined, they were found to contain factors
that increased their metabolism by making it less ...e scientists do not yet fully understand how these factors
work, it is suspected that while the make the metabolism less efficient, on the positive side they r...
Unexpected changes in Earth's climate observed on the dark side of the moon
...s the planet," said Palle. "This depends upon many factors
in addition to albedo, such as the amount of greenhouse gases (water vapor, carbon dioxide, methane) present in the atmosphere. But this new data emphasizes that clouds must be properly accounted for and illustrates that we still lack the understand...
'Noisy' genes can have big impact
...eliminated any influence of external environmental factors
or variables such as differences in cell type, since the two genes were operating inside the same cell. After using this technique to study the function of various promoters, the scientists concluded that noise did, indeed, affect gene expression in ...
Gene at root of urban air pollution's lung effects
...arlier work highlighting the importance of genetic factors
in determining the lung's response to environmental toxins by pinpointing a key player in the process, said Duke pulmonologist John Hollingsworth II, M.D., lead author of the study. "The lung is constantly exposed to a broad spectrum of environmental...
Indoor mold, building dampness linked to respiratory problems and require better prevention
...INGTON -- Scientific evidence links mold and other factors
related to damp conditions in homes and buildings ...lth effects of exposure to mold from all the other factors
that may be influencing health in the typical indoor environment," said committee chair Noreen Clark...
Study shows that genes can protect kids against poverty
...espite adversity. Interested in understanding the factors
that contribute to a child's resilience to poverty..., to seek out the particular genes and non-genetic factors
that promote a child's ability to overcome the odds poverty predicts for them. "The main point of t...
51 globally threatened species get new lease on life in the Caucasus
...ly address the broader social, economic and policy factors
essential to results that benefit both nature and people. The forests, high mountain ecosystems and arid landscapes of the Caucasus contain more than twice the animal diversity found in adjacent regions of Europe and Asia. However, biodiversity of t...
Cancer drug resistance research leads to possible therapeutic target for Alzheimer's disease
...nnections," Tew said. "This may be due to genetic factors
as well as the brain's own process of increasing cholesterol and iron levels in middle age. "In samples of brain sections from Alzheimer's patients, the ABCA2 protein shows unusual patterns of expression," Tew added. "That also suggests that this tr...
Cells may shoot messenger to halt protein production
...se to suddenly stop producing proteins like growth factors
that activate genes in response to a hormone or other signaling chemical. The mechanism also plays a key role in Cooley's anemia, which causes the loss of red blood cells in infants and children, and may contribute to changes in gene activation in ca...
Plant pathologists to meet in Anaheim, CA to discuss agricultural security, food safety, and more
...to control future outbreaks. Speakers will address factors
that influence establishment and persistence of human pathogens on fruit and vegetables from pre-harvest through processing and storage. Microbial Forensics: Plant Pathogen Models The potential for microbes to be used with an intent to harm people...
HIV takes cellular opportunities to aid infection
... cocktail," said Young. "Once we identify cellular factors
that regulate HIV replication, we may be able devise new treatments for other viral infections, as well."...
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