bacterial 2 6

Tag: "bacterial" at biology news

Bacterial 'switch gene' regulates how oceans emit sulfur into atmosphere

Scientists have discovered a bacterial "switch gene" in two groups of microscopic plankto...co-author of the Science paper. The discovery of a bacterial gene switch in these two groups of plankton will open new areas of research, since DMSP synthesis ma...

Scientist works to improve treatment for brain tumors

...s the immune system. Debinski combined IL13 with a bacterial toxin to create a cytotoxin drug to target cancer cells and less healthy cells. The efficacy of the first generation of the drug has been has been tested in a clinical trial (phase III) involving 190 patients at 40 different medical centers worldwide...

Gut reaction: Researchers define the colon's genome

... subjects. They found evidence for several hundred bacterial phylotypes, most falling into two divisions of bac...al species is related M. smithii. How many unique bacterial genera or species exist in the colon community? By comparison to the outside world, Gill suspects th...

MRSA vaccine shows promise in mouse study

By combining the four bacterial surface proteins that generate the strongest immun...ng killed or live attenuated bacteria, or selected bacterial subunits, produced, at best, only partial immunity. "For S. aureus vaccines to succeed," said Schne...

Researchers discover how bacteria sense their environments

... believes the kind of cooperative lattice found in bacterial receptors may in fact point to a general mechanism for cellular signaling and serve as inspiration for developing molecular devices. Such devices could be used to sense a wide range of chemicals, light, ionic strength (salt), pH and heavy metals with...

Stomach receptor for H. pylori discovered

...havior of the epithelial cells due to injection of bacterial proteins into the cells. This interaction can lead to peptic ulcer disease, gastric adenocarcinoma, and non-Hodgkins lymphoma of the stomach. "Ulcers are a breach in the gastric or duodenal mucosa and gastric adenocarcinoma is one type of cance...

New study reveals structure of E. coli multidrug transporter protein

...ing specific drugs to expel." Multidrug resistant bacterial infections raise the cost of medical treatment and...chlorophenyl hydrazone is either expelled from the bacterial cell or into the periplasmic space-the space between the outer membrane and the plasma membrane in g...

Surprising symbiosis: Glassy-winged sharpshooter eats with friends

... had assumed that the sharpshooter needed just one bacterial symbiont (in this case, B. cicadellinicola), as does the biologically similar aphid. University of Arizona evolutionary biologist Nancy Moran, who has extensively studied the co-evolution of insects and their resident bacteria, recruited Eisen to t...

Green tea and the 'Asian Paradox'

...ed in managing and preventing allergies, diabetes, bacterial and viral infections, cavities, reduce or cure diseases with an inflammatory component and improve neurologic and psychological health. "More studies are necessary to fully elucidate and better understand green tea's method of action, particularly a...

Potato blight pathogenicity explained by genome plasticity

...Govers. "Effectors are quite common in fungal and bacterial plant pathogens, including Phytophthora . But in our case, the gene appears to produce a large regulatory protein that exerts its effect by regulating the expression of other genes, possibly effector genes." While the exact mechanism by which thes...

Report focuses on the role good microbes play in future medicine

...iarrhea. The organisms help reinforce the natural bacterial barrier that exists on the lining of the digestive tract providing additional protection against pathogenic organisms that can cause diarrhea. "Several probiotics have been shown to shorten the duration of acute watery diarrhea caused by rotavirus i...

The Midas Bug -- the bacterial alchemy of gold

...ected. DNA profiling of this biofilm identified 30 bacterial species with populations unique to the gold grains when compared to the surrounding soils. One species was identified on all of the DNA-positive gold grains from both locations. DNA sequence analysis of this species identified it as the bacterium R...

Parallel evolution: Proteins do it, too

...on on RNASE1, a pancreatic enzyme that breaks down bacterial RNA. Most primates have one gene encoding the enzyme, but he found that the douc langur, a colobine from Asia, has two---one encodes RNASE1, and its duplicate encodes a new enzyme, RNASE1B. The duplicate enzyme, it turns out, works better than the or...

Speeding the search for elusive chromosomal errors

...han other, more commonly used microarrays, such as bacterial artificial chromosome arrays," said Dr. Shaikh. "Our study is one of the first to report using these microarrays in a clinical setting to detect constitutional rearrangements which lead to severe birth defects." Constitutional rearrangements occur in...

Transgenic goat's milk offers hope for tackling children's intestinal disease

... inhibits the growth of bacteria by destroying the bacterial cell wall, causing the contents of the cell to lea...at's milk containing human lysozyme can impact the bacterial makeup of the digestive tract in these two distinct animal models," Maga said. "It is likely that th...

Gut microbes' partnership helps body extract energy from food, store it as fat

...taining a mixture of not just human cells but also bacterial cells and cells of another microscopic domain of l...versity Professor. "As adults, the number of these bacterial and archaeal microbial cells exceeds the number of our human cells by tenfold. The genes present in ...

Smell of success for nanobiosensors

...to medical applications to diagnose organ failure, bacterial infections or diseases such as cancer being made commercially available within a few years, as well as devices that would have a major impact on other sectors. A major challenge of these new diagnostic tools lies in the establishment of a precise odo...

Bacteria give up secrets in war waged on plants

... State University scientists. Under study is the bacterial pathogen Pseudomonas syringae, better known as the disease agent of bacterial speck. The pathogen reared its speckled head in tomatoes, causing serious crop loss. Scientist Sheng...

Quitting smoking improves lung function considerably

...ils are white blood cells (phagocytes) that engulf bacterial and fungal infections, along with ingesting foreign debris. "Sputum neutrophil counts are reported to be increased in heavy smokers with asthma compared with nonsmokers with asthma," said Dr. Thomson. The authors noted that in many developed coun...

Basic work on E. coli identifies two new keys to regulation of bacterial gene expression

...i, we can understand more about these processes in bacterial species that we need to control, like those that cause disease or make toxins. E. coli is also the workhorse of the biotechnology industry. Understanding E. coli gene expression in detail allows us to harness these cells for producing products of bio...

1 2 3 4 5 6 7 8 9 10