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Study of Immune Protein Could Help Fight Tuberculosis, Other Pathogens

Scientists at UT Austin have revealed how a protein called ISG15 helps the human immune system fight certain pathogens, including the microbe that causes tuberculosis. In 2012, the group was part of a study that demonstrated that ISG15 stimulates the release of a cytokine, Interferon-g, important in the response to pathogenic bacteria. With this latest work, published this week in the journal Molecular Cell, these scientists have identified the cell surface receptor for ISG15 and determined the initial steps in how it activates the secretion of a range of cytokines.

Jon Huibregtse, UT Austin professor of molecular biosciences who led the study, said this may provide new insights into how to modulate immune responses and treat microbial infections.

“We think we may be on the trail of an entirely new mechanism for stimulating cytokine secretion,” said Huibregtse, “and that this might have implications for a wide variety of infectious diseases.”

Read the paper: Extracellular ISG15 Signals Cytokine Secretion through the LFA-1 Integrin Receptor

New MBS Faculty Member Receives Etter Early Career Award

mclellanJason McLellan, future associate professor in the Department of Molecular Biosciences, has received the Etter Early Career Award from the American Crystallographic Association.

The Etter Early Career award, which was established in 2002, seeks to recognize outstanding achievement and exceptional potential in crystallographic research demonstrated by a scientist at an early stage of their independent career.

McLellan’s research focuses on applying structural information to the rational design of interventions for viruses, specifically the respiratory syncytial virus (RSV). According to the Centers for Disease Control and Prevention, nearly every child in the US catches RSV, a virus that infects the lungs and respiratory tract, by the age of two.

He has been working to develop a monoclonal antibody, a type of antibody that targets only one specific protein, which could act as a vaccine surrogate to prevent severe RSV in infants.

McLellan, who is currently an assistant professor at Dartmouth College, will join the UT Austin faculty in January 2018.

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