Tag: "defense" at biology news

Bacteria research offers hope for new vaccine against meningococci

... The bacteria are almost knocked out by the immune defense system, but then they resurge, this time with alterations in the surface protein. Whats more, we discovered that the bacteria aggregate in the thyroid and can impact hormone production during the infection, says Ann-Beth Jonsson. The study also sh...

FSU researchers determine a critical factor in workings of proteins

...ological processes, such as the utilization of and defense against toxins; the activation of receptor proteins on cell membranes by growth hormones; and the regulation of actin polymerization, which influences the physical structure of living cells. The association rate thus plays a critical role in the over...

Winners of the 2006 AAAS Science Journalism Awards

... Quite by accident, the researchers found a secret defense system in living cells, a gene-silencing mechanism called RNA interference. It has become one of the hottest topics in biology and was the subject of the recently awarded 2006 Nobel Prize for Medicine or Physiology. In addition to the RNAi segment, t...

Unpeaceful co-existence: How strengths and weaknesses maintain biodiversity in an ant community

...se small crickets can be collected so quickly that defense is unimportant. For both large and small crickets, two ant species are adept at both finding and defending resources, and would be predicted to outcompete the others because they violate the tradeoff. But it is precisely these ants that are beset by ...

JCI table of contents: Feb. 1, 2007

... ACCOMPANYING COMMENTARY TITLE: An intrinsic host defense against HIV-1 integration? AUTHOR CONTACT: Paul D. Bieniasz Aaron Diamond AIDS Research Center, The Rockefeller University, New York, New York, USA. Phone: (212) 448-5070; Fax: (212) 725-1126; E-mail: pbienias@adarc.org . View the PDF of this artic...

Nonvenomous Asian snakes 'borrow' defensive poison from toxic toads

...e that's dependent on a diet of toads for chemical defense is highly unusual," said Hutchinson. Hutchinson said the research had identified six compounds in the snakes that may hold promise in medical treatments for people suffering from hypertension and related blood pressure disorders. The researchers ...

Scripps Research study reveals new function of protein kinase pathway in tumor suppression

...d on signaling pathways that mediate an anti-tumor defense response called senescence, or cellular aging. The research, which was conducted in both human cell culture and rodent models with skin cancer or lymphoma, identified one essential element of this anti-tumor response, namely, p38-regulated/activated ...

Molecular link between inflammation and cancer discovered

...nking chronic inflammation and cancer." Cellular defense is a rapid process compared to cellular developmen...referred to the parallel sets of steps in cellular defense and development as "mirror image pathways." His team showed that these pathways are not distinct fr...

Cracking open the black box of autoimmune disease

...m is often described as a kind of military unit, a defense network that guards the body from invaders. Seen in this way, a group of white blood cells called T cells are the frontline soldiers of immune defense, engaging invading pathogens head on. These T cells are commanded by a second group of cells cal...

JCI table of contents: Jan. 18, 2007

...fore identifies Cbl-b as a component of early host defense against infection with P. aeruginosa, an observation that could help develop new strategies for the treatment of individuals infected with this major opportunistic pathogen. TITLE: The ubiquitin ligase Cbl-b limits Pseudomonas aeruginosa exotoxin Tm...

Can engineered immune cells stop AIDS?

...pletely new way of manipulating the body's natural defense system. "Rather than focusing on conventional vaccines that boost the immune system, we are experimenting with a way to help the immune system produce antibodies that can neutralize the virus," says Wang. "If we can design a modified virus that w...

Donald H. Sebastian receives award from SMART

... innovation and productivity building the nation's defense and economic base," said Sebastian. "That's why we have been supporters of SMART since it started." Sebastian is responsible for the solicitation, development and implementation of large-scale technology research and development projects at NJIT. ...

Scientists find potential 'off-switch' for HIV virus

...e serve as the metaphorical generals in the body's defense system against illness. When an HIV virus particle invades a T cell, most often it converts the cell into a factory for making other viral particles, killing the cell in the process. Without these T cells, the body loses its ability to repel other in...

Wheat can fatally starve insect predators

...from insect damage. "This is a different kind of defense than we were expecting," said Christie Williams, a USDA-Agricultural Research Service scientist and Purdue Department of Entomology adjunct assistant professor. "Usually we expect the plant to fortify its cell walls or make poisons to use against ins...

Homing nanoparticles pack multiple assault on tumors

...IO's tumor homing ability was impeded by a natural defense response, which activates the reticuloendothelial system (RES)--white blood cells which together with the liver and spleen comprise a protective screening network in mice (and humans). The investigators devised "decoy" molecules of liposomes coated...

Genetically altered cells may help artificial skin fight infection

...t exist throughout the body as part of its natural defense system. Researchers have only recently begun targe...ed skin substitutes, it would provide an important defense system boost during the initial grafting period, when the skin is most susceptible to infection," ex...

Proposed FDA claim recognizes role of key nutrients in dairy in reducing osteoporosis risk

...ng bones in kids and teens, and providing the best defense against developing osteoporosis later in life," says Frank Greer, MD, FAAP (Fellow of the American Academy of Pediatrics), chairman of the AAP Committee on Nutrition. "While calcium supplements and non-dairy foods such as calcium-fortified beverages ...

Joining forces

... two different types of weapons used by the innate defense systems of organisms, a team of scientists at the Weizmann Institute of Science has managed to design a more powerful weapon, hoping that this will provide a basis for novel and more effective antibiotics. The first is a "magnetic" weapon a natura...

Unfolded proteins may protect cells from dying

...ve therapy. "When it comes to avoiding cancer or defense against virally infected cells, cell death is a good thing," says Steller. "But when cells are stressed, and as a result are dying too easily, blocking the pathways that lead to the activation of cell death would be an ideal way to fight disease. Usi...

Treatments for urinary infections leave bacteria bald, happy and vulnerable

...ells and allow the bacteria to mount a cooperative defense against the host's immune system. "We're leaving the bacteria bald but healthy and happy," says Jerome S. Pinkner, lab manager for Hultgren. "Rather than trying to kill them, we're working to make them non-pathogenic, so that they will be unable to ...

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