Tag: "defense" at biology news
Bursts of waves drive immune system 'soldiers' toward invaders
...ells, or neutrophils, are the body's first line of defense
against potentially harmful microbes, and are one of the swiftest cells in the body. The wave action that speeds them along is generated by the same kind of three-part circuit that fires electrical signals along a neuron or prods the heart to beat, t...
Features of replication suggest viruses have common themes, vulnerabilities
... the viral genome while safe from surveillance and defense
mechanisms of the host. " The virus has develope...ther processes in the cell, most importantly, host defense
responses." In essence, the virus is reorganizing the cell to make a new intracellular architectur...
Green tea boosts production of detox enzymes, rendering cancerous chemicals harmless
... might help some people strengthen their metabolic defense
against toxins capable of causing cancer. In a s...ST enzymes are believed to be crucial to the bodys defense
against cancer-causing chemicals and other toxins, according to the studys lead investigator, H.-H. ...
New target for HIV/AIDS drugs and vaccine discovered
...dy-forming part of the immune system (the homeland defense
or acquired immune system). In this report, resear...) cells. Second, after blocking this first line of defense
against the immune system, Nef uses DCs and NK cells to create a microenvironment that actually make...
Naval Science and Technology Conference 2007
...ch, military labs, private industry, academia, and defense
contractors to share knowledge and discuss how technology can be leveraged to meet each others existing and future needs. Members of the media are urged to contact Nancy McGuire no later than 1:00 p.m., on Friday, July 27, 2007 to arrange access to...
One species, many genomes
..., on the other hand, such as those responsible for defense
against pathogens or infections, are much more variable than the average gene. "The genetic variability appears to reflect adaptation of local circumstances," says Weigel. It is likely that such variable genes allow plants to withstand dry or wet, ho...
First genome-wide study of infectious disease opens new avenues for HIV treatment, vaccines
...lf from immune system efforts to eliminate it. One defense
is the ability of an HIV gene, nef, to decrease the production of two related immune system proteins, HLA-A and HLA-B. Nef, scientists believe, is not able to similarly hamper the expression of HLA-C. If scientists could design a vaccine to enhance H...
UC Santa Barbara scientists clarify molecular basis of interferon action
...ls. The interferon system is an important host defense
against viral and microbial pathogens, said Samuel. In addition to inhibiting virus multiplication, interferons affect other processes in animal cells, including cell growth and differentiation and the immune response. Current work in Samue...
Study explains how pathogens evolve to escape detection
... into the plant's cells and undermines the plant's defense
system. "Plant breeders often find that five or si...come the plant's resistance. Normally, the plant's defense
system looks out for such pathogens and, if detected, mounts an immune response to stave off disease...
Tips from the Journals of the American Society for Microbiology
...ed Ticks May Protect Against Harmful Parasite A defense
molecule isolated in ticks infected with the Babesia sp. parasite may protect animals and humans against infection. Researchers from the U.S. and abroad report their findings in the July 2007 issue of the journal Infection and Immunity. Babesios...
Fat horses face health problems
...reactive oxygen species and the bodys anti-oxidant defense
mechanisms, and that imbalance is in favor of the oxidants, said Thatcher. Those free radicals and reactive oxidant species can affect macromolecules in the body such as lipids, DNA and proteins, ultimately causing cell death or changing the functio...
Rapid evolution of defense genes in plants may produce hybrid incompatibility
...uses or insect predators. Such stresses mobilize defense
genes that initiate physiological responses that help the plants to survive. One such response is programmed cell death, which occurs in response to invasion by viruses or bacteria. The cells invaded by the pathogens are quickly marked by the plant...
Elevated CO2 in atmosphere weakens defenses of soybeans to herbivores
...ed with defense, which down-regulate the important defense
CystPls against beetles, Zavala said. Zavala also explained, Under natural field conditions, elevated CO2 not only increased susceptibility of soybean to herbivory by the invasive species Japanese beetle, but also enhanced the performance of these ...
Ancient retrovirus sheds light on modern pandemic
...presence of an ancient, rapidly evolving antiviral defense
gene called TRIM5a, which produces a protein that ... that this is because humans had this innate viral defense
system," Emerman said. To test their hypothesis, Emerman and co-authors Harmit Singh Malik, Ph.D., a...
Mucosal-surface immune function discoveries could boost vaccine research
...cosa appear to be a major new player in the immune defense
of these vulnerable surfaces. "That's really important, because we now want to know how crucial IgA is to the neutralization of HIV, rotavirus or other pathogens," adds Dr. Daniel Knowles, a study co-author and chairman of the Department of Patholo...
On the defense: Conserved features of plant innate immunity
...innate immune response is the body's first line of defense
against pathogen infection. In the June 15th issue of G&D, Dr. Xin Li (University of British Columbia) and colleagues report that three proteins work together in the MOS4-associated complex (MAC) to execute innate immunity in the mustard weed, Arabid...
Chemical Society Boston meeting, Aug. 19-23, focuses on health, wellness, energy, environment
...nce and nanotechnology for chemical and biological defense
New drugs based on RNA interference technology Using nanomaterials in medical imaging and drug delivery Antifreeze proteins New approaches for preventing and treating obesity Polymers and surfactants for personal, home, and health...
UCLA researchers discover novel pathway that may promote immune system balance
.... While inflammation is part of the body's natural defense
system against infection, Shuai said, unbalanced inflammation can make people more vulnerable to diseases such as cancer. The PIAS1 pathway serves as the Yin to the inflammation triggering Yang, working to keep a healthy balance in the immune syst...
Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific
... outer shellshave developed sophisticated chemical defense
mechanisms, which is particularly important because promising industrial and medicinal products have been isolated from known species. New species may provide cures for diseases that are currently untreatable. Working from the Smithsonian Tropical R...
Fibers are center stage at international conference
...iber laser systems, lasers for automotive welding, defense
sensing and warfare applications. ...
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