Stem Cell Resistance (image) Brown University Caption Ten days after treatment with a medically appropriate dose of the chemotherapy drug MTX, adipose-derived stem cells, left, survive while normal human fibroblasts, right, are impaired. Insets show untreated control cells. Credit Darling lab/Brown University Usage Restrictions with credit 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.