Mice (IMAGE) Penn State Caption Tempol significantly reduced the weight gain of the mice compared to the group of mice that were not fed the drug. Andrew Patterson, assistant professor of molecular toxicology at Penn State, said the study indicates that the drug acts on the microbiome and may open up new pathways for medical treatments. Credit Patrick Mansell, Penn State Usage Restrictions non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.