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16 Current news about the topic valves


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Antibody blocks inflammation, protects mice from hardened arteries and liver disease


Researchers at University of California San Diego School of Medicine discovered that they can block inflammation in mice with a naturally occurring antibody that binds oxidized phospholipids (OxPL), molecules on cell surfaces that get modified by inflammation. Even while on a high-fat diet, the ...


Mechanical heart valve prosthesis superior to biological


A mechanical valve prosthesis has a better survival record than a biological valve prosthesis, according to a large registry study from Sweden’s Karolinska Institutet. The finding can be highly significant, since the use of biological valve prostheses has increased in all age groups in recent ...


A changing view of bone marrow cells

Caltech researchers show that the cells are actively involved in sensing infection


In the battle against infection, immune cells are the body's offense and defense—some cells go on the attack while others block invading pathogens. It has long been known that a population of blood stem cells that resides in the bone marrow generates all of these immune cells. But most scientists ...


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Why don't trees "bleed" to death when they are injured?

Special microscope used to reveal hidden aspects of plant anatomy


Researchers from Virginia Tech, the Georg-August University of Gottingen, Germany, and the Jackson Laboratory of Bar Harbor, Maine, have discovered how "check valves" in wood cells control sap flow and protect trees when they are injured. The study, published in the September issue of the ...


A new generation of biological scaffolds


Professor John Fisher from The University of Leeds has spoken at the UK National Stem Cell Network Annual Science Meeting in Nottingham about his team's research into how biological scaffolding will pave the way for off-the-shelf tissue transplants. Professor Fisher and his colleague Professor ...


Same types of cell respond differently to stimulus, Stanford study shows


Using new technology that allows scientists to monitor how individual cells react in the complex system of cell signaling, Stanford University researchers have uncovered a much larger spectrum of differences between each cell than ever seen before. Cells don't all act in a uniform fashion, as was ...


'Safety valve' protects photosynthesis from too much light


Photosynthetic organisms need to cope with a wide range of light intensities, which can change over timescales of seconds to minutes. Too much light can damage the photosynthetic machinery and cause cell death. Scientists at the Carnegie Institution were part of a team that found that specific ...


Protein that triggers plant cell division revealed by researchers


From the valves in a human heart to the quills on a porcupine to the petals on a summer lily, the living world is as varied as it is vast. For this to be possible, the cells that make up these living things must be just as varied. Parent cells must be able to divide in ways that create daughter ...


Microbial biofilms evoke Jackal & Hyde effects


Microbes such as bacteria tend to live in complex colonies called biofilms, where there can resist antibiotics and cause more problems for the immune system. Biofilms comprising millions of bacteria are at the root of many serious chronic infectious diseases such as cystic fibrosis and ...


Arena Pharmaceuticals Continues Phase 3 BLOOM Obesity Trial


Arena Pharmaceuticals, Inc. announced that an independent Echocardiographic Data Safety Monitoring Board (the Board or EDSMB) found no reason to stop the ongoing pivotal Phase 3 trial, BLOOM (Behavioral modification and Lorcaserin for Overweight and Obesity Management). The BLOOM trial is ...


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