DNA-Based Drug Delivery System (IMAGE) North Carolina State University Caption Biomedical engineering researchers have developed a drug delivery system consisting of nanoscale "cocoons" made of DNA that target cancer cells and trick the cells into absorbing the cocoon. Enzymes inside the cocoons (the "worms" in this image) are unleashed once inside the cell, destroying the cocoon and releasing anti-cancer drugs. Credit Zhen Gu Usage Restrictions Image credit must be given. 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.