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Tag: "weeks" at biology news

Prenatal Stress Keeps Infants, Toddlers up at Night, Study Says

...tance, mothers classified as clinically anxious 18 weeks into pregnancy, compared to their non-anxious counterparts, were about 40 percent more likely to have an 18-month-old who refused to go to bed, woke early, and kept crawling out of bed. The childs rocky relationship with sleep often persisted until h...

Cigarette smoke alters DNA in sperm, genetic damage could pass to offspring

...en exposed to cigarette smoke for either six or 12 weeks to look for alterations in a specific stretch of repeated portions of DNA, called Ms6-hm, which does not contain any known genes. The “smoking” mice were exposed to two cigarettes per day, the equivalent – based on blood levels of tobacco by-products...

Gene therapy delivery of nerve growth factors reverses erectile dysfunction in animal model

...out the GDNF or neurterin genes inserted. Four weeks after the treatment, rats administered HSV-GDNF ex...ompared with the control or untreated mice at four weeks after treatment. Fluorescent protein studies also showed that the delivered genes had been effective...

In mice, drug protects against diabetes and atherosclerosis

... mice was put on a high-fat "western" diet at five weeks of age; half received the inhibitor drug. A second group of animals ate the western diet for eight weeks, at which time they developed severe atherosclerosis. Then they were started on the drug to determine whether the drug could halt or reverse the ...

University of Pittsburgh School of Medicine researchers develop 'off-the-shelf' vascular grafts

...planted them in the abdominal aortas of rats eight weeks before performing tests to determine how well the grafts had performed. The cell-seeded constructs showed a significantly higher blockage-free rate than unseeded controls (55 percent versus 0 percent). In addition, at eight weeks, there was an extens...

Staphylococcus aureus hides out in cells

...ll found viable bacteria in their model system two weeks after infection. The findings may help in understanding persistent infections, and in designing new antibacterial drugs. S. aureus has not traditionally been considered an intracellular pathogen, but the molecular details that govern its extended...

Treating HIV in war zones -- Public health emergencies need rapid advice from WHO

...one month to convene an expert team, and only five weeks for the team to summarize the evidence and prepare draft guidelines. The guidelines were then discussed at a two-day meeting, after which a draft manuscript for publication was prepared within 10 days. In a related editorial discussing how WHO is...

Human stem cell treatment restores motor function in paralyzed rats

...ne returned to near normal ambulatory function six weeks after receiving grafts of human spinal stem cells (hSSCs), researchers from the University of California, San Diego (UCSD) School of Medicine report. The study, led by Martin Marsala, M.D., UC San Diego professor of anesthesiology, is published in th...

Pistachios lower cholesterol, provide antioxidants

...r two weeks. They then tested three diets for four weeks each with a two-week break between each diet. All three diets were variations on the Step I Diet, a cholesterol-lowering diet in general use. The diets included a Step I Diet without pistachios which had 25 percent total fat and 8 percent saturate...

Anthrax paralyzes immune cells with lethal toxin, UF research shows

...The disease causes flu-like symptoms that can take weeks to develop, according to the Centers for Disease Control and Prevention. But once the first symptom appears, the disease progresses rapidly and patients often die from shock before they realize they have more than a common cold. The current method of...

Newborn neurons like to hang with the 'in' crowd

...inted. He observed that between three and four weeks after injection of the virus newborn neurons sent out dendritic filopodia—tiny feelers that probe the environment. "When we analyzed them in three dimensions, the tip of the filopodia was preferentially associated with synapses already connected to o...

Dealing deadly cancers a knockout punch

... cells. Through this mechanism, which persists for weeks or months, the body continues to fight off cancer long after the virus clears from the body. Future directions On April 11, 2007, Oncolytics announced it had initiated a Phase II trial to evaluate intravenous administration of Reolysin in pa...

Thymus transplants gives hope to babies with fatal immune disease

...oved thymus tissue is grown in culture for several weeks in a laboratory while researchers ensure that there are no diseases present in the tissue. Strips of tissue are then implanted in the baby's thigh, where they attract a blood supply and begin to act like a thymus gland. Within three to four months, m...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...ce data). The project tracked 31 teachers over two weeks and recorded their voices during all waking hours. The data captured voice-production events as short as 0.0316 seconds and as long as 100 s. On average, the teachers had 1,800 occurrences of voicing per hour at work, compared to 1,200 per hour durin...

The quest for an effective HIV vaccine presents new possibilities, challenges

...lishes HIV reservoirs in lymphatic tissues. Within weeks of exposure, virus levels peak and then decline to levels that may remain low for months or years. It is believed that CD8+ T cells--so-called killer T-cells--are responsible for this reduction in HIV levels; however, their ability to continue to sup...

DNA analysis suggests under-reported kills of threatened whales

...the shops selling whale meat, with gaps of several weeks and even months between surveys," Baker pointed ou...th each succeeding week, and their estimate of six weeks for the "half-life" of an individual whale gives future researchers a good idea of how frequently th...

Rapid response was crucial to containing the 1918 flu pandemic

...o half compared with cities that waited just a few weeks to respond. Overall mortality was also lower in ci...ia imposed bans on public gatherings more than two weeks after the first infections were reported. City officials even allowed a city-wide parade to take pla...

Need oxygen? Cells know how to spend and save

...researchers then exposed mice to hypoxia for a few weeks and found that they too showed increased levels of COX4-2. In 1992, Semenza's team had discovered a protein which they called HIF-1 (for hypoxia-inducible factor 1) that cells make in response to hypoxia. HIF-1 turns on genes that help cells surv...

MIT model helps researchers 'see' brain development

...ostly premature babies ranging from about 30 to 40 weeks of gestational age, and three were from children aged two, three and seven years. Grant scanned these infants and children to assess possible brain injury and found no neural defects. Later, she also consulted with Fischl's team to ensure that their ...

Newborn brains grow vision and movement regions first

...tic resonance imaging (MRI) scans in the first few weeks after birth. In terms of brain volume, the researchers found newborn male brains were 7.8 percent larger than females. In addition, males had 10.2 percent more gray matter and 6.4 percent more white matter than females. No significant difference i...

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Breaking Biology News(10 mins):Big data approach identifies Europe's most dangerous human and domestic animal pathogens 2Global Leaders In Science, Medicine, And Engineering Gather For The 36th Annual International Conference Of The IEEE Engineering In Medicine And Biology Society, August 26-30 In Chicago 2Global Leaders In Science, Medicine, And Engineering Gather For The 36th Annual International Conference Of The IEEE Engineering In Medicine And Biology Society, August 26-30 In Chicago 3
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Breaking Medicine News(10 mins):Health News:American Brain Tumor Association Awards New Research Grants to Best and Brightest Investigators 2Health News:American Brain Tumor Association Awards New Research Grants to Best and Brightest Investigators 3Health News:Drug represents first potential treatment for common anemia 2Health News:Participants of cardiac clinic trials do not represent real world patients, study finds 2Health News:Jaha, Inc. The Most Affordable Fitness Band in the Market Released on Kickstarter 2
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