invade in Biological News

11,000 alien species invade Europe

This release is available in German . Halle/Saale. For the first time it is now possible to get a comprehensive overview of which alien species are present in Europe, their impacts and consequences for the environment and society. More than 11,000 alien species have been documented by DAI...

Pacific shellfish ready to invade Atlantic

As the Arctic Ocean warms this century, shellfish, snails and other animals from the Pacific Ocean will resume an invasion of the northern Atlantic that was interrupted by cooling conditions three million years ago, predict Geerat Vermeij, professor of geology at the University of California, Davi...

Bacteria that cause urinary tract infections invade bladder cells

St. Louis, Dec. 17, 2007 Scientists at Washington University School of Medicine in St. Louis have found definitive proof that some of the bacteria that plague women with urinary tract infections (UTIs) are entrenched inside human bladder cells. The finding confirms a controversial revision of ...

Jefferson researchers' discovery may change thinking on how viruses invade the brain

A molecule thought crucial to ferrying the deadly rabies virus into the brain, where it eventually kills, apparently isn’t. The surprising finding, say researchers at Jefferson Medical College in Philadelphia, may change the way scientists think about how central nervous system-attacking viruses su...

Genes discovered that allow gum disease bacterium to invade arteries

Researchers have identified the genes in gum-disease bacteria that allow them to invade and infect human arterial cells, offering one possible explanation for a perceived connection between gum disease and heart disease. Scientists from the University of Florida, Gainesville, present their finding...

Grizzlies set to invade high Arctic?

The telltale paw prints with huge 10 centimetre-long nails spoke volumes. But now definitive corroborating DNA evidence seals the case of the most northerly sighting of a grizzly bear. The discovery fuels mounting evidence that Canada's High Arctic is no longer the sole preserve of the polar bear -...

Antibody targeting of glioblastoma shows promise in preclinical tests, say Lombardi researchers

...ppears to be another example of cancer that develops when embryonic genes are upregulated. As a result, brain tumor cells are extremely motile and can invade other parts of the brain very quickly." In this latest research, Wellstein and his colleagues searched public databases, at the National Library of...

Protein that promotes cancer cell growth identified

...helps relay signals that can cause cancer cells to proliferate, migrate and invade surrounding tissues. The study was published in the journal Cancer Researc.... This same signaling pathway stimulates neuroblastoma cells to migrate and invade neighboring tissues--a critical process in cancer metastasis. "Caspase-8...

Chasing tiny vehicles

...dy been tried in cancer therapies: They have been administered by infusion and then directed via magnetic fields to a tumor whose cells they should invade directly. But until now, is has been impossible to observe nanoparticles along their route, especially into living tumor cells. It is a prerequisite, ...

Reviews of microbial gene language published in special issue of Trends in Microbiology

...s ahead. Four of the papers in the special issue look at how Gene Ontology can be used to dissect the complex interactions involved when pathogens invade their hosts and lead to disease. They include descriptions of bacterial effector proteins, virulence factors, effector protein delivery systems, and i...

Toward an explanation for Crohn's disease?

...preferentially recognizes a peptide called N-glycolyl-MDP, which is only found in a specific family of bacteria called mycobacteria. When mycobacteria invade the human body, they cause an immediate and very strong immune response via the NOD2 receptor. "Now that we have a better understanding of the norm...

Nitrogen research shows how some plants invade, take over others

...gain nitrogen and how this allows plant species to invade and take over native plants. In an article publ... it also gives them an upper hand in being able to invade other species." Biologists had identified six ...e elms, or eventually to weedy exotic grasses that invade our native rangelands. The study is the latest ...

Major breakthrough in early detection and prevention of AMD

...en to the eye. Central vision loss occurs when these abnormal blood vessels invade the retina, the light-sensitive tissue that lines the inner surface of the eyeball. "Once the vessels invade the retina, the horse has already left the barn," Ambati said. "At that poi...

Changing climate likely to make 'super weed' even more powerful

...rom growing too close to them. However, Phragmites uses this strategy not so much to keep other plants away, but to aggressively conquer them and invade new territory, Bais said. ...

LSUHSC research describes function of key protein in cancer spread

...g the transition from a localized tumor to metastatic disease, cancer cells acquire the ability to detach from their neighboring cells and move to and invade tissue at distant points in the body. "Because tumor metastasis leads to a poor prognosis and tremendously complicates treatment, it is of utmost...

Tumor growth and chemo response may be predicted by mathematical model

...changes in cellular characteristics, causing more aggressive tumor cells to invade the healthy tissue. As cancer cells invade and replicate themselves, they make the tumor shape unstable and more invas...

Computer model predicts brain tumor growth and evolution

... all respects. They focused specifically on a glioma because it does not invade the body through a basement membrane as epithelial-based cancers do, such a.... In the brain, tumors grow without having to digest a basement membrane to invade adjacent tissue. A basement membrane is essentially boundary of a given tis...

New technology shows promise against resistant staph infections

...e U.S. Staph are also notorious for infecting patients while they're in the hospital for other reasons. Staph infections can be deadly if the bacteria invade the bloodstream, heart, lungs, or urinary tract. As more strains of staph become resistant to common antibiotics, the need for new treatments has beco...

Yale researchers uncover secrets of salmonella's stealth attack

... A single crafty protein allows the deadly bacterium Salmonella enterica to both invade cells lining the intestine and hijack cellular functions to avoid destruction, Yale researchers report in the April 17 issue of the journal Cell . ...

Researchers identify new way the malaria parasite and red blood cells interact

...an red blood cells, is important for invasion of the malaria parasite. However, the specific molecule by which the malaria parasite attaches itself to invade the host was not known until now. The team examined how the malaria parasite, Plasmodium falciparum, interacts with red blood cells using a biochem...

Honest crabs, power to the hungry, nice mice and clever meerkats: News from the American Naturalist

...bout their intentions. Some models suggest that animals may lie about their intentions up to 40 percent of the time. Laidre used dummy hermit crabs to invade the personal space of live crabs. Contrary to the models, the crabs nearly always backed up their threats with an attack. Those that didn't signal a t...

Researchers isolate protein domain linked to tumor progression

... researchers found that a domain known as the hemopexin domain was important for tissue invasion events. During tissue invasion, cells from one tissue invade into and usually move through another tissue, sometimes ending up in a completely different part of the body from where the tissue was formed. This pa...

Pubic hair provides evolutionary home for gorilla lice

...ontact involved in human ancestors butchering gorillas could have enabled Pthirus to jump hosts, rather as bushmeat slaughter practices allowed HIV to invade humans from chimpanzees in modern times." So, while head lice may be viewed as a 'family heirloom', inherited down the generations as humans have ...

Researchers 'unzip' molecules to measure interactions keeping DNA packed in cells

.... "Our hope is that if we can establish and understand the interactions within the nucleosome, we can begin to understand how the motor proteins can invade the nucleosome," Wang said. Optical trapping involves a focused beam of light that can "trap" small objects. A refractive sphere is chemically attac...

Dramatic expansion of dead zones in the oceans

...e overturning circulation of the ocean would greatly weaken in response to global warming, these oxygen minimum zones would expand much more still and invade the deep ocean." Extreme events of ocean oxygen depletion leading to anoxia are thought to be prime candidates for explaining some of the large extinc...

Fluorescent proteins illuminating biomedical research

...ntributed a novel PAFP to a new method of viewing individual breast cancer cells for several days at a time, providing new details on how cancer cells invade surrounding tissue and reach blood vessels, a process called metastasis. "Mapping the fate of tumor cells in different regions of a tumor was not pos...

UC Davis researchers find molecule that targets brain tumors

...most common and aggressive type of primary brain tumor in adults. It is marked by tumors with irregular shapes and poorly defined borders that rapidly invade neighboring tissues, making them difficult to remove surgically. "These brain tumors are currently treated with surgery to remove as much of the tu...

Shade coffee benefits more than birds

...hes and canopy tree species, including nitrogen-fixing legumes and fruit trees. Since then, farmers have allowed understory trees such as Miconia to invade because they help prevent soil erosion. The trees spread into the farms when birds and bats carry their seeds from "mother trees." By performing a ...

Brown chemist finds gray mold's killer gene

... shutting off this gene by interrupting the fungus's DNA completely shuts down toxin production, removing the special weapon the mold uses to kill and invade target plant cells. "It's a big step to being able to disarm this toxin naturally through a combination of DNA sequencing and chemistry," said Cane...

Einstein researchers develop a new way to study how breast cancer spreads

... cancer cells for several days at a time. The study, by scientists in Einstein's Gruss Lipper Biophotonics Center, provides detail on how cancer cells invade surrounding tissue and reach blood vessels. These movements are the first steps of the potentially deadly stage of cancer known as metastasis. The...

Montana State University researchers find gene that regulates mold's resistance to drugs

...d Aspergillus fumigatus, said Cramer, assistant professor of fungal pathogenesis in MSU's Department of Veterinary Molecular Biology. A. fumigatus can invade the lungs and cause dangerous diseases, including Invasive Pulmonary Aspergillosis. Patients with a compromised immune system, especially organ trans...

Proteomics study yields clues as to how tuberculosis might be thwarting the immune system

...gator with the Howard Hughes Medical Institute, and Keasling is director of the Joint BioEnergy Institute. When bacteria or other foreign particles invade the body, the first line of defense are the macrophages, which engulf and contain the invaders within the membrane-bound shells of their phagosomes. O...

Response to immune protein determines pathology of multiple sclerosis

...movement. For these patients, the disease tends to progress more rapidly and the prognosis is particularly bleak. MS ensues when the body's T cells invade the brain and trigger nerve-damaging inflammation, in part by secreting proteins called cytokines. According to the new study, lead by Washington Univ...

Caltech biologists spy on the secret inner life of a cell

...ies how the immune system recognizes its targets, work that is offering insight into the processes by which viruses like HIV and human cytomegalovirus invade cells and cause disease. The electron tomography images revealed that the FcRn/antibody complexes were collected within cells inside large vesicles...

Metastatic movements in 3-D

...andom migration, the authors thus blocked avb3. The treated cells changed their mode of migration from unidirectional to random, and their ability to invade 3D gels increased. The changed behavior correlated with an increase in trafficking of a5b1 from intracellular compartments to anterior membrane protru...

Scientists identify a molecule that coordinates the movement of cells

...ons for understanding how cancer cells metastasize. "The most dangerous part of cancer is that cancer cells migrate from their primary location and invade other parts of the body," says first author Xiaoyang Wu, a postdoc in Elaine Fuchs's Laboratory of Mammalian Cell Biology and Development. "ACF7 facil...

Research about plant viruses could lead to new ways to improve crop yields

...retty soon it was everywhere." The exchange of genes between different viruses is a well-known phenomenon and generally takes place when two viruses invade the same host, Stubbs says. According to the scientist, this makes it quite likely that a third family of flexible filamentous viruses, the Closterovi...

New meat-eating dinosaur from Argentina had bird-like breathing system

... in bird breathing," Martinez said. Its bones have telltale pockets and a sponge-like texture called "pneumatization," in which air sacs from the lung invade bone. Air-filled bones are the hallmark of the bellows system of breathing in birds. Alcober noted, "Despite its huge body size and lack of a breas...

Meat-eating dinosaur from Argentina had bird-like breathing system

...of soft tissue and filled with air in life. These chambers result from a process called pneumatization, in which outpocketings of the lungs (air sacs) invade the bones. Air-filled bones are the hallmark of the bellows system of breathing in birds and also are found in sauropods, the long-necked, long-tailed...

Gap junction protein vital to successful pregnancy, researchers find

...owth. "The formation of these new blood vessels is extremely critical for embryonic growth at this stage of pregnancy, when the embryo has begun to invade into the uterine tissue, but has yet to make a connection to the placenta where it ultimately gets its nutrients," said Illinois veterinary bioscience...