Stem Cells Before and After Treatment (IMAGE) Michigan Medicine - University of Michigan Caption Mouse epiblast stem cells (top) have already begun the journey to differentiating into "adult" cells. But when the same kind of cells were treated with a drug called MM-401, they reverted to an 'embryonic' stem cell state. Credit University of Michigan Usage Restrictions Credit University of Michigan 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.