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Tag: "responses" at biology news

Mussels evolve quickly to defend against invasive crabs

...ly assumed. The paper is called "Divergent induced responses to an invasive predator in marine mussel populations." "It's the blending of ecological and evolutionary time," says Freeman, a Ph.D. candidate in the department of zoology. "It's an important development in the arms race between these crabs and th...

Study details hepatitis C ability to block immune system response

...ells. While interferon production and other immune responses can greatly influence the course of a number of different viral infections, many human pathogenic viruses have evolved distinct strategies to inhibit the early signaling events leading to interferon production. HCV is no different. "We have previous...

Heal thyself: Systems biology model reveals how cells avoid becoming cancerous

...escribed for the first time a web of inter-related responses that cells use to avoid becoming diseased or cance... in cell growth and division, protein degradation, responses to stress, and other metabolic functions. Ideker and others have theorized that when a cell's DNA is...

Novel therapy combinations gain ground in treating hepatitis

...reatment will determine if these encouraging early responses will result in a sustained response, hopefully imp...e the ability of VX-950 to produce sustained viral responses with as little as 12 weeks of therapy." VX-950 + pegIFN + RBV was well tolerated, with no serious ad...

Researchers uncover new mechanism of tumor suppressor

...ene expression programs that allow for appropriate responses to DNA damage in normal cells. When the process br...n and regulates cell growth, proliferation, stress responses and aging. We hope this discovery opens up new opportunities to establish novel targets to prevent a...

NHGRI announces latest sequencing targets

... known differences between immune and inflammatory responses of chimps and humans. Identifying these genes gives researchers a more precise starting point for understanding molecular pathways and developing better diagnostics and therapies involved in immune and inflammatory diseases. In addition...

First study to show how immune cells 'speak' to each other in vivo

...tic function during normal and pathological immune responses in vivo. The full study can be accessed at www.jem.org . WHY: The mechanism of how immunological synapses "speak" to each other in vivo has not been observed prior to this research. Although formal proof of this awaits the development of dr...

Researchers develop flood-tolerant California rice

...e the rice plants orchestrate a number of cellular responses to submergence that are controlled by specific genes present in the submergence gene cluster. The researchers report that this cluster, which originated in the Indian rice and was bred into the California rice, is responsible for changes in cell meta...

High-dose flu vaccines appear to safely boost immunity in elderly

... to background information in the article. Immune responses decrease with age, however, and currently available flu vaccines are not always effective in the elderly. Recommended vaccines contain 15 micrograms (ìg) of inactivated virus per strain. Wendy A. Keitel, M.D., Baylor College of Medicine, Houston, a...

Microscopic passengers to hitch ride on space shuttle

...microbes so scientists can study how their genetic responses and their ability to cause disease change. The...derstanding human biological changes and microbial responses while living in enclosed quarters in space is important to the health, safety and performance of cre...

U of M researchers find immune-activating cells in intestines

... this population of cells may be important in many responses in the gastrointestinal system, which may be helpful in studying diseases and conditions such as ulcerative colitis, and Crohn's disease. The research was done in collaboration with scientists at Harvard University. ...

Brain enzyme treatment relieves memory lapse in Alzheimer's mice

...he box or the auditory cue. Contextual versus cued responses represent different forms of learning that depend on different parts of the brain. A day after their exposure to the shock, mice with reduced levels of Uch-L1 showed a decrease in freezing behavior to 65% that of normal mice when placed in the box....

Radiation-killed bacteria vaccine induces broad immune response in mice

...retain the ability to trigger innate immune system responses via proteins called toll-like-receptors. Based on ...ia retained the ability to stimulate innate immune responses via toll-like-receptor proteins. "Although completely inactivated by the radiation, and thus unable ...

Role of protein in immune response may aid HIV research

...port that various organs mount different defensive responses with PGLYRP when exposed to bacteria. The skin produces these proteins only when exposed to virulent or high numbers of bacteria. In contrast, the liver, whose function is to continuously monitor the blood and fight acute infection, produces PGLYR...

Progress being made in exploring potential use of stem cells to treat heart disease

...t are sufficient to invoke cell survival or repair responses in damaged heart cells "The use of stem cells to generate replacement cells for damaged heart muscle, valves, vessels and conduction cells holds great potential," says Srivastava, who is also a UCSF professor of pediatrics and the Wilma and Adeli...

Ritalin packs punch by elevating norepinephrine, suppressing nerve signal transmissions

...ssion and suppresses mid- and long-latency sensory responses in the primary somatosensory cortex of awake rats," by Philadelphia-based researchers Candice Drouin, University of Pennsylvania; Michelle Page, Thomas Jefferson University; and Barry Waterhouse, Drexel University College of Medicine appears online i...

USC researchers investigate protein that protects tumors

...st cancer cells to evade the body's natural immune responses could be a target of future cancer therapies, according to a study by scientists from the Keck School of Medicine of the University of Southern California. The study, published in the July 1 issue of the American Journal of Pathology, is the firs...

Just the expectation of a mirthful laughter experience boosts endorphins 27 percent, HGH 87 percent

...ge in Th1 and Th2 cytokine and inflammatory immune responses to the anticipation and experience of the positive mood state changes associated with mirthful laughter." Future research in this area with more subjects "needs to elaborate these findings in psychoneuroimmunology understanding and the mechanism lin...

Experimental drug reverses key cognitive deficits, pathology in Alzheimer's

...nsmitters. This triggering initiates such cellular responses as the wave of electrical excitation of a nerve impulse. As an animal model of AD, the researchers used a "triple knockout" mouse in which three key genes involved in normal brain protein processing pathways had been knocked out, creating both amyl...

Marrow-derived stem cells deliver new cytokine to kill brain tumor cells, offer protection

...t several cytokines ?proteins that regulate immune responses ?to track down and destroy glioma cells. In 2002, the scientists reported that they had produced central nervous system cells from stem cells derived from bone marrow. Because these stem cells originate in the bone marrow instead of the brain or fet...

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