Nucleus drives stem cells (IMAGE) Stanford University School of Engineering Caption Bone-marrow derived stem cells use the physical force generated by the nucleus to help bore through biological obstacles to reach fractures and help initiate healing. " Credit Hong-pyo Lee Usage Restrictions with attribution 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.