Brain tweak lets sleep-deprived flies stay sharp

Scientists testing sleep’s effects on learning have devised a model that presents fruit flies with a simple choice: fly into a lighted vial or a darkened one.Staying awake slows down our brains, scientists have long recognized. Mental performance is at its peak after sleep but inevitably trends downward throughout the day, and sleep deprivation only worsens these effects. For the first time, researchers at the School of Medicine have found a way to stop this downward slide. When scientists genetically tweaked a part of the brain involved in learning and memory in fruit flies, the flies were unimpaired even after being deprived of sleep.

New disease-fighting nanoparticles look like miniature pastries

Ultra-miniature bialy-shaped particles — called nanobialys because they resemble tiny versions of the flat, onion-topped rolls popular in New York City — could soon be carrying medicinal compounds through patients’ bloodstreams to tumors or atherosclerotic plaques. The nanobialys are an important addition to the stock of diagnostic and disease-fighting nanoparticles developed by researchers at the School of Medicine.

First U.S. incision-free procedure for obesity performed at Washington University

Photo by Tim ParkerSreenivasa Jonnalagadda, M.D., and J. Christopher Eagon, M.D., performing the first TOGA procedure in the United States.Doctors at the School of Medicine have performed the first non-surgical procedure in the United States that restricts the size of the stomach to treat obesity. The investigational procedure was performed under direct endoscopic visualization with specialized instruments passed into the stomach through the mouth. The first U.S. patient received the treatment on July 23 at Barnes-Jewish Hospital in St. Louis.

Exercise could be the heart’s fountain of youth

Absence may make the heart grow fonder, but endurance exercise seems to make it younger. According to a study conducted at the School of Medicine, older people who did endurance exercise training for about a year ended up with metabolically much younger hearts. The researchers also showed that by one metabolic measure, women benefited more than men from the training.

Researchers discover primary sensor that detects stomach viruses

WU researchers have identified a protein sensor that detects norovirus (shown here), a highly contagious stomach bug.There’s no cure for the so-called stomach flu, a group of highly contagious viruses that can hit with a vengeance, causing nausea, vomiting and diarrhea. Doctors’ standard advice: drink lots of fluids and let the virus run its course. Symptoms typically last only a couple of days, but they can be miserable ones. Now, scientists at the School of Medicine report they have identified the primary immune sensor that detects the presence of stomach viruses in the body.

Nutritionist offers tips to make it through the New Year without putting on pounds

It’s possible to keep your diet intact during the holidays.The holiday season, with all its sweet temptations, will be here before you know it. However, all those holiday parties and office gatherings laden with scrumptious food and drink don’t have to mean the end of your weight loss plan. It’s still possible to enjoy the bounty and not feel deprived of your favorite holiday dishes, says Connie Diekman, director of University Nutrition at Washington University in St. Louis. Video available.
View More Stories