New way viruses trigger autoimmunity discovered (Links to an external site)

Roseolovirus particles emerge from an infected immune cell (above). Studying mice, researchers at Washington University School of Medicine in St. Louis have discovered that roseolovirus can trigger autoimmunity in a previously unknown way: by disrupting the process by which immune cells learn to avoid targeting their own body's cells and tissues.

Autoimmune diseases such as rheumatoid arthritis and Type 1 diabetes are thought to arise when people with a genetic susceptibility to autoimmunity encounter something in the environment that triggers their immune systems to attack their own bodies. Scientists have made progress in identifying genetic factors that put people at risk, but the environmental triggers have […]

Antibiotic doesn’t prevent future wheezing in babies hospitalized with RSV (Links to an external site)

Antibiotics provide no benefit in preventing future recurrent wheezing in babies hospitalized with respiratory syncytial virus (RSV), according to a new study led by Washington University School of Medicine in St. Louis. And there is some evidence that antibiotics may make wheezing worse.

The antibiotic azithromycin has anti-inflammatory properties that can be beneficial in some chronic lung diseases, such as cystic fibrosis. With that in mind, researchers investigated its potential to prevent future recurrent wheezing among infants hospitalized with respiratory syncytial virus (RSV). With such babies at increased risk of developing asthma later in childhood, the scientists hoped […]

Researchers unravel omicron’s secrets to better understand COVID-19 (Links to an external site)

In two recent studies, researchers at Washington University School of Medicine in St. Louis found evidence that the omicron variant of the virus that causes COVID-19 causes less severe disease than previous variants — at least in rodents — but that many antibody-based therapies may not be effective against it. (Image: Getty Images)

When South African scientists announced in November that they had identified a new variant of the virus that causes COVID-19, they also reported two worrying details: one, that this new variant’s genome was strikingly different from that of any previous variant, containing dozens of mutations compared with the original virus that emerged in 2019; and […]

Researchers solve medical mystery of deadly illness in young child (Links to an external site)

New research from Washington University School of Medicine in St. Louis has solved the medical mystery of why a 2-year-old child — seemingly healthy at birth — succumbed to an undiagnosed, rare illness. On the left is normal lung tissue showing air sacs with thin cell layers for the exchange of oxygen and carbon dioxide. On the right is the patient's lung tissue. Because of a mutation in the RAB5B gene, the walls of the air sacs are thick and unable to participate in gas transfer.

New research from Washington University School of Medicine in St. Louis has solved the medical mystery of why a 2-year-old child — seemingly healthy at birth — succumbed to an undiagnosed, rare illness. The research team identified a previously unknown genetic cause of interstitial lung disease, providing answers to the parents and doctors puzzled by […]