Tag: "oxygen" at medical news

Irradiation, refrigeration can add to beneficial effects of wine grapes

...esveratrol protect against the damaging effects of oxygen and nitrogen in the human body, helping prevent high cholesterol, heart disease and Alzheimer's disease. Though the researchers studied only a Spanish variety known as Napoleon table grapes, the findings can apply to other grapes used to make wine, T...

FDA awards grant to metaphore pharmaceuticals to study septic shock in humans

...emy of Sciences in August, confirmed the role that oxygen free radicals, produced in excess during septic sh... possible means. However, the large quantities of oxygen free radicals produced by the body during this internal fight also destroy catecholamines, the natur...

Encouraging one year results in vessel growth factor trial

...osits. Such deposits reduce the flow of blood and oxygen to the heart, which can cause chest pain known as angina. The deposits can also trigger heart attacks. The protein, called vascular endothelial growth factor (VEGF), is produced by the body and initiates the growth of new blood vessels, a process c...

Free radicals mediate arsenic's harmful effects

...s. Free radicals form naturally in the body during oxygen metabolism, but their levels rise with the presence of some toxins. They are harmful because they tend to interact strongly with nearby molecules, changing the structure of cellular components such as DNA. Using a spin trapping assay, Dr. Hei's team ...

Specifying alcohol-related brain damage in young women

...wed us to examine very subtle changes in blood and oxygen use in the brain while our subjects did tasks that are difficult for young heavy drinkers," said Tapert. After ensuring that all study participants had been abstinent from alcohol for at least 72 hours, researchers tested their cognitive (or thinkin...

UNC study ties depression, anxiety to fatigue in HIV-positive patients

...s of hemoglobin, the complex molecule that carries oxygen to tissues; lower than normal hematocrit, which indicates the proportion of cells and fluids in the blood; and low levels of CD4 cells, the immune system defensive cells that the AIDS virus slowly destroy. The UNC team studied 40 otherwise healthy ...

Cincinnati chemist wins national award for medical contributions

... of liquid but perfectly healthy. The liquid is an oxygen and carbon dioxide carrier, a fluorocarbon later f...heart-lung machine, the Clark electrode to measure oxygen levels quickly in blood, surgical techniques to reattach the eye's retina, agents to image tumors an...

Harvard chemist wins national award for creating new molecules

...te 1980s Jacobsen began to design how to attach an oxygen atom to a particular side of a molecule. The reaction later turned out to be a critical step in making an AIDS drug, manufactured by Merck and Co. as Crixivan. Thus the chemistry professor has found himself in the usual position of working closely ...

Unergrad's invention may deliver life-saving medicine

...ugs deep into the lungs. The deep lung area, where oxygen enters the bloodstream, may be an effective entry point for DNA vaccines and other medications used to treat ailments ranging from cystic fibrosis to cancer. Krauland began making the particles last summer. First, he formed nascent aerosol particles ...

Duke chemists synthesize fungus compound that could lead to oral diabetes drugs

...aped compounds containing double-bonded carbon and oxygen groups. "One of the things that I think is really interesting about this project is that it's enabling us to address basic questions about the insulin receptors and how they work," said Pirrung, who also is a key member of Duke's Program in Biolo...

New method lets researchers study heart cell communication

...Heart muscle cells can become uncoupled when their oxygen supply is cut off, as happens during a heart attack. Other researchers have used voltage-sensitive dyes to study the flow of electrical signals through heart tissue. "The problem with some of those dyes is they're pretty toxic," Muller-B...

Researchers gain insights on pulmonary fibrosis

...g scar tissue limits the lung's ability to take in oxygen and get rid of carbon dioxide. There are many forms of the disease, with the familial form estimated to make up 5 percent to 10 percent of all pulmonary fibrosis cases. "This is the only ongoing program in the U.S. that is systematically studying...

Human brain has unsuspected oxygen reserve, challenging previous theories

...nlike many other animals, humans have a reserve of oxygen in the brain. This buffer allows the brain to adap...reases occur during tasks such as reading to raise oxygen levels in the brain, says study leader Mark A. Mintun, M.D. That idea has been long assumed in brain...

Avandia may reduce risk of cardiovascular disease

...nocyte chemoattractant protein-1 (MCP-1), reactive oxygen species (ROS) and C-reactive protein (CRP), mediators of inflammatory activity associated with the development of atherosclerosis. Study endpoints included the amount of ROS generation, serum CRP and MCP-1 at the start and end of the trial. In addi...

Drug protects infants with high-risk heart defect from neurologic and cardiac injury after heart surgery

...s ability to scavenge or inhibit the production of oxygen free radicals, tissue-damaging chemicals produced during circulatory arrest. Before reconstructive surgery was introduced in the early 1980s, HLHS was invariably fatal in early childhood. Survival rates for HLHS have been improving over the past 20...

Optical technique studies brain activity without surgery on skull

...ur technique works by measuring the blood flow and oxygen consumption in the brain." The optical technique i... penetrates the skull where it assesses the brains oxygen level and blood volume. The scattered light is then collected by optical fibers, sent to detectors ...

COOL AID safe after stroke, may deter side effect of clot-busters

...ered body temperature) can suppress the release of oxygen free radicals and inflammatory responses known to play a role in reperfusion injury. The goal of this pilot study was to provide brain protection to patients at high risk of developing large strokes by combining strategies to restore blood flow with...

Antioxidant herbal extract may help prevent and treat reflux oesophagitis

...p given the higher dose. The authors conclude that oxygen free radical damage is a major cause of reflux oesophagitis, and that antioxidants should be considered alongside acid suppressants as primary treatment. [Oxidative stress is more important than acid in the pathogenesis of reflux oesophagitis in rats...

Risk of lung damage from ultrasound greater than once thought

....The air-blood barrier the membrane through which oxygen diffuses in the lung is very thin, and may be the principal target for ultrasound-induced lung damage. The cause of the damage appears to be mechanical in nature, OBrien said. A sound wave has momentum and imparts a force. A beam of sound focused ...

Practical guidance for treatment of heart failure is launched

...loses the ability to pump enough blood to meet the oxygen and other needs of the body. It is estimated that up to 50 million of the 1000 million people (5%) who inhabit the 47 nations of the European Society of Cardiology may have a heart failure related problem. 3 For many patients the prognosis is poo...

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