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Tag: "stimulated" at biology news

Scientists look to the Bahamas as a model for coral reef conservation

...fected host is constantly having its immune system stimulated and refined, that may provide it with resistance to other things." He wondered whether, as seen with H. pylori, humans are also unknowingly causing the disappearance of other things that have been with us for all of our evolution, and that might pla...

Melanoma vaccine strategy shows promise in laboratory experiments

...er-killing immune response when killer T cells are stimulated with this peptide," says Dorothee Herlyn, D.V.M., senior author on the study and a professor in the Immunology Program and Molecular and Cellular Oncogenesis Program at Wistar. "The results emphasize the potential of this approach for creating an eff...

Researchers get neurons and silicon talking

... transistors. What's more, the neurons can also be stimulated through the capacitors. This is what enables the two-way communications. The project tested the device by stimulating the neurons and recording which ones fired using standard neuroscience techniques while tracking the signals coming from the chip. ...

Boosting newborns' immune responses

...at is crucial for vaccine responses. When TLR8 was stimulated by various agents that mimic viral antigens, the c...atric Research, finds that when newborns' TLRs are stimulated during the first week of life, their white cells' production of the cytokine IL-6, which inhibits pa...

Manipulating single cell receptor alters animal behavior

...to demonstrate that two intracellular events, both stimulated by the same cell receptor, can provoke different b...he study examines intracellular signaling pathways stimulated by AT1, a receptor for angiotensin, a polypeptide hormone that regulates internal equilibrium among ...

Stanford study of owls finds link in brain between sight and sound

...m the same spatial location as that encoded by the stimulated site. The same stimulation suppressed the auditory system's response to sounds coming from other locations. Selecting certain kinds of information to be processed, while ignoring others, is the root of attention. What was previously known about the ...

Sea coral's trick helps scientists tag proteins

... red fluorescent proteins give off light only when stimulated by higher intensity light. Lukyanov's findings resulted in the discovery of many new GFP-like proteins in non-bioluminescent and sometimes even non-fluorescent marine organisms, Zimmer said. Meanwhile, Sergey Lukyanov and other researchers had disc...

Chemical guidance of T cells leads to immunologic memory and long-term immunity

...particular dendritic cells that have been properly stimulated by helper T cells? Dr. Germain and his colleagues determined that naïve CD8+ T cells do not wander aimlessly through the lymph node but instead are steered towards areas in which dendritic cells concentrate. Think of the lymph node as a large airpor...

New Research Shows Artificial Light at Night Stimulates Breast Cancer Growth in Laboratory Mice

...e show that nighttime exposure to artificial light stimulated the growth of human breast tumors by suppressing t...latonin-depleted blood from light-exposed subjects stimulated tumor growth. “We observed rapid growth comparable to that seen with administration of daytime blood...

Understanding the actions of others requires the frontal cortex

...nificantly impaired if the left frontal cortex was stimulated while the videos were shown. This result indicates that the left frontal cortex is necessary for understanding other people's actions, and it implies that people who suffer strokes to this region may also have difficulty understanding actions or gest...

Trial success for diabetic nerve therapy

...of a DNA-binding protein protected nerve function, stimulated nerve growth and prevented tissue damage that in humans can lead to limb loss." An estimated 50 per cent of patients with long-term diabetes develop some form of neuropathy that can cause numbness and sometimes pain and weakness in the hands, arms, ...

Ritalin packs punch by elevating norepinephrine, suppressing nerve signal transmissions

...ociety. From whiskers to brain The researchers stimulated rats' whiskers while recording the activity of the neurons in the sensory pathways that convey this sensation from the whiskers to the cerebral cortex. They compared the rat's sensory pathway response to the whisker stimulation when receiving two dif...

Stanford snake venom study shows that certain cells may eliminate poison

... be fatal. Given that tendency to overreact when stimulated by allergens, it seemed plausible that introducing venom into the body would trigger a similar response. But Galli and Martin Metz, MD, a postdoctoral scholar in pathology and first author of the study, have shown that when mast cells respond to sele...

Radiation-killed bacteria vaccine induces broad immune response in mice

...e with live Listeria. The irradiated bacteria also stimulated a protective response from immune system cells called T cells. Previously, only vaccines made from live, weakened Listeria bacteria were believed capable of eliciting a T-cell response. "This advance is potentially of great importance in meeti...

PTEN: the Treg's handbrake

...ry T cells, Tregs do not proliferate in vitro when stimulated through either their TCR or IL-2 receptor alone. Now, in a study appearing online on August 17 in advance of print publication in the September issue of the Journal of Clinical Investigation, Laurence Turka and colleagues from the University of Pe...

Life and death in the hippocampus: what young neurons need to survive

...ver the receptor picks up a glutamate signal it is stimulated and relays the signal. But for newborn neurons that signal means something else entirely -- survival. "When we removed the NMDA receptor, that is when cells make connections in response to glutamate in the environment, the newborn neurons withered ...

Study details hepatitis C ability to block immune system response

...he production of a family of what are known as IFN stimulated genes that have a multitude of inhibitory effects ... have previously demonstrated that many interferon stimulated genes with antiviral activity are induced in the liver during HCV infection," said Francis V. Chisar...

H5N1 vaccine could be basis for life-saving stockpile

...duals are those whose immune systems have not been stimulated to respond to a particular antigen. The St. Jude study was the first one to show cross-reactive immunity against current H5N1 variants in ferrets, according to Robert Webster, Ph.D., a member of the Infectious Diseases department and holder of the ...

Scientists to employ Arctic ice and polar bears to protect diversity of world's crops

...duals are those whose immune systems have not been stimulated to respond to a particular antigen. The St. Jude study was the first one to show cross-reactive immunity against current H5N1 variants in ferrets, according to Robert Webster, Ph.D., a member of the Infectious Diseases department and holder of the ...

Computational analysis shows that plant hormones often go it alone

...y aspect of their biology. Growth, for example, is stimulated by multiple hormones -- brassinosteroids, auxins and gibberellins among them. The fact that these and several other hormones stimulate plant growth suggested to some investigators that eventually they all switch on the same growth-promoting genes. ...

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