Tag: "nitric" at medical news

Study Reveals Possible Clue For Racial Differences In Prevalence Of High Blood Pressure

...picalresponse and, normally, is partly mediated by nitric oxide," adds Panza, head ofechocardiography at NHLBI. "But the activity of nitric oxide during mentalstress is reduced in blacks." To sort out the racial differences in the role of n...

Candles with lead wicks emit lead into the air

... The lead released as candle fume was collected in nitric acidand analyzed by means of an atomic absorption spectrometer. In addition tomeasuring emission rates, he calculated concentration levels of lead in the airin an enclosed space after one hour and then again, for five hours. "The half-life of lead i...

UCSF Study Finds DHEA Benefits Cardiovascular Function

...lood pressure. A balance between ET-1 and nitric oxide is essential for maintainingvascular tone, which is necessary for controlling blood pressure, maintainingthe tone of coronary arteries and regulating blood flow to the heart and otherparts of the body, Zellner said. When ET-1 is elevated the he...

Chemists Discover That Aerosol Clusters Play Larger Role In Generation Of Air Pollution

...en theycreated in their lab a gas-phase cluster of nitric oxide -- one of the mostcommon industrial emission...e people have observed within a gas-phase cluster, nitric oxide reacting withan organic molecule to create an acid and a reactive carcinogen." He noted that w...

Cedars-Sinai Medical Center Specialist Addresses Neonatal Issues At Annual Meeting Of The Pediatric Academic Societies

...infants have been analyzed. Findings indicate that nitric oxide production isindeed lower in the presence of labor. The authors speculate that a "nitricoxide production threshold" is related to the initiation of labor at term....

High blood pressure drug promotes new blood vessel growth in lab animals, providing potential 'angiogenesis' treatment

...rowth remains unknown, some research suggests that nitric oxide, a chemicalproduced by blood vessels that he...n particular, are a verypotent means of augmenting nitric oxide availability," Isner says. "So theincreased availability of nitric oxide may account for part ...

Study suggests potential new approach to glaucoma therapy

...g seen reports on nerve damage caused by excessive nitric oxide, wedecided to look for evidence of high levels of nitric oxide in human eyes withglaucoma," said lead author Arthur H. Neufeld, Ph.D., the Bernard BeckerRese...

Brain chemical mellows male mice, but makes mouse moms tough

...tween a single brain chemical--theneurotransmitter nitric oxide--and opposing effects in male versus femaleb..., have been given a defective copy of the gene for nitric oxidesynthase, a protein that creates nitric oxide for use as a signal in braincells. Theoretically,...

Scientists develop polymers with nitric-oxide releasing particles

...g tiny silica particles that release low levels of nitric oxide gas. The U-M polymers are designed to mimic human endothelial cells, which produce nitric oxide to relax blood vessels and inhibit blood coagulation. "Our goal is to reproduce the body's n...

Beyond Viagra: other phosphodiesterase inhibitors are candidates for potential therapies

...pecific PDE found in the penis. In the presence of nitric oxide, a signaling molecule released from the nerv...Here is why inhibition of the PDE has that effect: nitric oxide causes the production of a secondary signaling chemical, cyclic GMP, which leads to erection. ...

New chemistry being developed for delivery of neuroprotective drugs

...ne oxidases (MAO) A and B and the neuronal form of nitric oxide synthase (nNOS) are two enzyme systems thought to be involved in neurodegenerative pathways in Parkinson's disease. A synthetic compound which inhibits both enzymes, 7-nitroindazole, has been shown to have neuroprotective effects in animal mode...

Scientists find biological key to 'wasting syndrome'

... and boosts the production of the free-radical gas nitric oxide. It also causes the addition of a phosphoro...NA, and proteins are produced. Or, if we block the nitric oxide synthase activity, this also blocks the downstream cascade, and everything normalizes." Accor...

Stopping statins may cause rebound that triples risk of death

...m. Statins also increase the release of protective nitric oxide from the cells lining the inner walls of hea...ther than simply returning to normal, the level of nitric oxide released by cells drops below normal. We tried to show that the withdrawal of statins in human...

American Thoracic Society Journal news tips for April (second issue)

...the effects of intravenous sildenafil with inhaled nitric oxide (a standard treatment) in a piglet model ofn...eted at lowering vascular resistance, with inhaled nitric oxide as a key treatment. The six piglets that were instilled with human meconium, with a resulting...

The Lancet Oncology (TLO) and The Lancet Infectious Diseases (TLID)

...is C virus infection in sub-Saharan Africa Role of nitric oxide in HIV-1 infection: friend or foe? Update on Kaposis sarcoma and other HHV8 associated diseases. Part 1: epidemiology, environmental predispositions, clinical manifestations, and therapy Could a herpesvirus be the cause of Kawasaki disease?...

Nitric oxide crucial to respiration

...eeds of tissues and that furthermore, the chemical nitric oxide is key to this process, leading the research...om such analyses, the scientists demonstrated that nitric oxide in the blood cells is an active regulatory molecule that causes the oxygen-carrying hemoglobin...

130-year-old mysteries solved: how nitroglycerin works; why patients develop tolerance

... heart and relieve the pain. While it is knownthat nitric oxide -- a breakdown product of nitroglycerin -- p...ientists still did not know the mechanism by which nitric oxide isgenerated from the nitroglycerin molecule, which in fact shows little resemblance to nitrico...

Gout drug shows promise in treating chronic heart failure

...al superoxide is a form of oxygen that neutralizes nitric oxide, a substance created by the endothelium (the inner lining of the arteries) that dilates healthy vessels to accommodate increased demands during exercise. In this randomized, placebo-controlled, double-blind crossover study, researchers gave 1...

New pathway for treating hypertension-related kidney failure studied

...nstable and hard to use; they are short-lived like nitric oxide, another potent vasodilator. We are trying to find ways to modify this structure so we can give it to a patient," Dr. Imig said. "We know EETs are there and that they are decreased in hypertension. If you look at a kidney destroyed by hypertens...

Bleach-producing enzyme found to modulate blood vessel dilation during inflammation

...each." Under normal conditions, a chemical signal, nitric oxide, produced by endothelial cells lining the bl...hin the blood vessel wall where it acts to consume nitric oxide, thereby blocking the signal that dilates blood vessels. Cellular and biochemical studies have...

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