Smoking Mice Lead To Emphysema Breakthrough
...eutrophils, white blood cells that destroy foreign invaders and, occasionally,cause inflammation. According to the most widely-accepted scenario, neutrophilsmount a counter-attack against smoke by congregating in the lungs and releasinginflammatory enzymes. The enzymes eventually break down elastic fibers in ...Recovery From Mass Extinction Is Unexpectedly Diverse
...ica,there was a significantly higher proportion of invaders than in the otherregions he studied. One explanation for the differences found in the Gulf Coast community is itsproximity to the Chicxulub impact site, where a massive meteorite slammed intoEarth 65 million years ago. But that explanation does not a...Invasive Weeds Pose Major Threat To American Landscape
...ent in whichthey did not evolve. Consequently, the invaders usually have no natural enemiesto limit their repr...n a plant-by-plant scale theeffects of these plant invaders are often subtle. "It's like metastatic cancer,"he said. "It starts with a single individual or seed...Mussels Muscling In, Crabs Pinching Native Species
...ne marauders in theirhome waters. Where are these invaders coming from? As ships take on water for ballast, ...g powerful on-board filtration systems. As for the invaders who havemade it into American waters, solutions range from the standard ? such aschemical treatments...Pharmacologists Discover Linkage Of Key Cell Switches
...s of the immune system that patrol the bodyseeking invaders such as viruses and bacteria. Specifically, CaMKIV switches ona complex of other proteins in the cell nucleus that triggers the T-cell toactivate genes, a process called transcription. That ultimately leads to rapidproliferation of the T-cells. ...Cattle Diets Could Control E. Coli Danger
...minated food, the native bacteria compete with the invaders and provide atleast some protection against food-borne illness. "Escherichia coli "is acommon bacterium in the GI tract, but it is usually outnumbered by other types. "E. coli" is never a beneficial bacterium, but under normal circumstances theanima...Patented Bait System May Hold Answer To Combating Formosan Termites
...amber that contains toxin-lacedmaterial, which the invaders carry back to their nest to kill the entire colony. Henderson and Chen put out their first full-scale tests with prototypebait stations Oct. 15. Developed with funds from the LSU Ag Center, the apparatus is made froma plastic cylinder ......ing that understanding theecological roles of such invaders in one region may help predict invasive rolesin ot... understood. Some analyses have proposedthat such invaders become established primarily in human-disturbed areas. Incontrast to these views, Horvitz and her a...Major Clinical Findings By California AIDS Team: HIV Does More Than Kill Off T Cells
...mory T cells, whosefunction is to ward off foreign invaders that the body encountered in earlieryears. Without a continuous supply of these cells, the immune system doesn't"remember" that it can successfully fight off previous enemies, and a personbecomes susceptible to a variety of infections. Second, virus...Powerful Anti-AIDS Agent Found In Tears And In Urine Of Pregnant Women
...an important role protecting the body from foreign invaders likeviruses and bacteria. Although it isn't understood yet how the proteins actually inhibit HIV, Dr.Lee-Huang suspects that lysozyme and ribonuclease act together to inhibit theHIV virus. In this scenario, the lysozyme may be acting to break do...Hopkins study shows new target for boosting the immune system to improve cancer vaccines
...der tokiller cells to seek out and destroy foreign invaders in the body. In cancer,the immune system remains asleep, because the CD-4+T-cell never sends the orderto attack. We believe the APCs can wake it up," explains Levitsky....Single switch triggers two immune system genes
...aptability in battling viruses, bacteria and other invaders receive on and offsignals from a single DNA segmen... roam the bloodstream, recognizing and attachingto invaders and marking them for destruction. Similarly, the receptors on Tcells-- the immune system's infection...USGS releases assessment of nation's biological resources
... no natural competitors or predators, enabling the invaders tothrive to the extent where they either out-compete native species, significantlyalter habitat or both," he said. In the Great Lakes, for example, the report shows that at least 25 non-nativefish species, as well as many other invasive aquatic orga...Jellyfish protein illuminates active immune cells
...ne system into gear, alerting itto the presence of invaders and prompting the production of the appropriateantibodies. But T cells don't find antigens on their own--the foreign molecules must beproffered by antigen-presenting cells (APCs), which recognize invaders, chewthem up, and display parts of the dest......stems of the body from identifying the implants as invaders and attacking them.There have been some indications that perfect single crystals offer the best bio-compatibility,but these are very difficult to apply to surfaces that are curved, which is generally the casefor implant devices. New self-assembled mo...Rapid size change in introduced fruit fly indicates it is evolving as it invades North America
...s of invasions become much more complicated if the invaders evolve rapidly. It is very likely that introduced invading species are evolving, and scientists typically have not appreciated how fast evolution can occur in an introduced species. This probably means native populations will be changing as well in...The future of planet earth: scientific challenges in the coming century
...uce economic and biological losses caused by these invaders by discovering the best pest-control methods, iden...t 703-648-4067. More specific information on these invaders and color photos are available at www.usgs.gov/invasive_species/ . Global Change The planet is c...International trade imperils U.S. plants, animals and crops
...roduced through the horticultural market." Alien invaders already cost the country $136 billion every year i...s, not including any increased costs from battling invaders already established in this country. "We obviously can't get rid of trade, but we have to make a ...New science resources available from the ESA
...do can inflict enormous ecological damage. Animal invaders for example, can cause extinctions of vulnerable n...g their food, or taking over their habitat. Plant invaders can completely alter the fire and nutrient cycles, and water and energy budgets in a native ecosyste...Gene therapy frees two children from sterile 'bubbles,' Science authors report
...ucial components of the immune system that destroy invaders and rally other immune defenses. Without this gene's direction, these cells do not develop, grow, or spread, and SCID X1 patients are left fatally vulnerable to even slight infectious insults to the body such as a cold sore or common childhood diseas...