Tag: "stimulate" at biology news

The Perils Of Discontinuing Therapy: Without HAART, Cytokines Stimulate HIV From Latently Infected Cells

...t of the lymph nodes, particularly cytokines,which stimulate these cells to produce virus." HAART (potent combi...us,one approach to purging these cells might be to stimulate them to spit out virusunder the cover of HAART. Two assumptions are built into this scenario: cells...

Ecological Consequences Of Jasmonate-Induced Responses For Plants In Native Populations

...hat the treatments of roots with jasmonate will stimulate responses comparable to those elicited by leaf wounding. N. attenuata has life history characteristics that make it particularly useful for a test of the cost-benefit model for induced defenses. It is an ephemeral member of the ann...

Syphilis Genome Sequence Offers Clues To Better Diagnosis, Prevention And Treatment

...nes. One or moreof these surface components might stimulate the immune system to respond to aninvasion of T. pallidum when an uninfected person is exposed to syphilis. "The genome sequence represents an encyclopedia of information on this elusivebacterium," says Dr. Weinstock. "We can now figure out ways to ...

Security Code Helps Immune Cells Attack Foe And Spare Self

...a killer T-cell dispose of a virus-infectedcell or stimulate immune cells that manufacture antibodies. Helper cells use receptors on their surface to read antigenic displays.But instead of getting close enough to get a really good look, T cell receptorsinteract only weakly with antigens. Scientists th...

Social Stress Causes Dormant Herpes Virus To Resurface In Mice

... changes in social interactions can stimulate a dormant herpes virus to resurface. In a series of experiments, 40 percent of mice with latent herpes had their virus reactivated when their social structure ...

New Hope On The Horizon For Patients With End-Stage Cardiovascular Disease

...se channels improveblood flow to heart muscles and stimulate growth of new blood vessels. To date,four patients...ected directly into the coronary artery to further stimulate bloodvessel growth. The initial injection is followed by a series of threeintravenous infusions -- o...

Molecular Circuit Breaker Can Prevent Runaway Cell Growth

...r role is to monitor various kinds of signals that stimulate cells toproliferate. When the strength of these si...th Sherr and Lowe, drugs designed toemulate ARF or stimulate ARF production might make cells more sensitive to themany conventional forms of anti-cancer therapy ...

Hopkins Study Shows Languishing Addictions Drug Really Works

...ethadone target. Once attached, molecules of LAAM stimulate the receptors. But because LAAM remains there for a relatively long time, it blocks receptor access for other opioid drugs: addicts take heroin, for example, and it has none of its usual effects. The study was funded by a U.S. Public Health System...

Team Of Max Planck Scientists Elucidates Structure Of A Protein Segment Involved In 'Von Recklinghausen Neurofibromatosis'

...he segment of the protein that is sufficient to stimulate Ras-mediated GTP hydrolysis, complements the active site which is where the reaction takes place. It does so by two strategies: Firstly, it supplies an amino acid (an arginine) that participates directly in the reaction; its mutation to a...

University Of Texas Southwestern Researchers Find Genetic Switch That Explains Effect Of Exercise On Muscles

... that there is a signalingpathway we can modify to stimulate or reverse what exercise does naturally. Webelieve it is possible to design a drug which would have this effect." The study provides evidence that three proteins called calcineurin, NFAT(Nuclear Factor of Activated T cells) and MEF2 (Myocyte Enhancer...

Gene Therapy Showing Promise In Fighting Melanoma

...n of chemicalscalled cytokines. Cytokine molecules stimulate production of certain white bloodcells in the body. The altered cells are then injected back into patients in theform of a vaccine. The vaccine is administered with a "gene gun," a unique tool that helpsscientists insert genetic material into cells. ...

Data Support Idea That Zinc Plays Key Role In Fight Against Anorexia

...rculating leptin concentrations are low and should stimulate an increase in NPY if the leptin-NPY link is functional. Shay theorizes that zinc deficiency affects the processing capabilities of NPY and negatively impairs its normal appetite-stimulating effect....

Loss Of Tumor Suppressor Gene Triggers Colon Cancer

...s apowerful growth promoter, and this study should stimulate a lot of newwork in this area." Under a licensing agreement between the Johns Hopkins University (JHU)and Genzyme, SAGE technology, which was used in this study, is licensedto Genzyme for commercial purposes. Kenneth W. Kinzler and Bert Vogelstei...

Adaptation's Basis May Be A Mix Of Genetic Tweaks, Whoppers

...artonsays. "Overall, I think that Orr's paper will stimulate a gooddeal of theoretical and empirical work on what is a key questionin evolution: what kind of genetic changes contribute toadaptation." Adaptation, which can take thousands of years to complete,takes forms ranging from the subtle to the mammo...

University Of Kentucky Biomedical Engineer Awarded Grant To Improve Joint Replacements And Dental Implants

...." Growth factors, which are proteins that stimulate cell division ordifferentiation, may help accelerate or enhance formation of bone aroundimplants. Puleo hopes their use will cause better contact between existing boneand the implant. "The project will ultimately benefit Americans who will r...

New Contaminant Invades Arctic Air

... scientificsociety. "Iron sulfate appears to both stimulate the growth of PCB dechlorinatingbacteria so that t...d, "therewere no reliable and practical methods to stimulate the most importantdechlorination processes." The study involved sediments from the upper Hudson Rive...

New Hypothesis Proposed For Cause Of Chronic Fatigue Syndrome

...ire rather than a three-alarm blaze -- which could stimulate parts of the immune response without raising an..., decrease the body’s immune response, and stimulate the production of certain cytokines linked to some CFS-like symptoms. “Part of this is ...

A Protein Switch May Turn On Heart Cells To Combat Heart Disease

...cLellan says. They hope that the same signals that stimulate dormant heart cells to enlarge --such as stress fr...maged cells after a heart attack -- may be able to stimulate cells treatedwith MRP1 to divide and replace the damaged cells, he says. Co-authors are Michael Schn...

Scientists Find First Protein In Central Nervous System Junctions

...refore plays atug-of-war with other chemicals that stimulate the same nerve cells, keepingthose cells in balance. When the nerve cells fail to receive glycine signals,they overreact to positive signals and in turn overstimulate muscles.Strychnine, which is commonly used as a rat poison, induces spastic paralys...

Cardiac Clinical Trial Studies Use of Antibiotic In Preventing Heart Attack

...tified in 30 to 40 percent of plaques where it may stimulate the whiteblood cells to trigger a heart attack," says Dr. Cercek. "If this hypothesis iscorrect, treating the patient with the antibiotic Azithromycin for five daysafter the initial heart attack, could prevent the ongoing infection andultimately prev...

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