placenta (IMAGE) University of Wisconsin-Madison Caption Yellow coloring in this microscope image is the mark of successful delivery of gene therapy via nanoparticles into placental cells from monkeys (each marked by blue-colored nuclei) and expression of a gene expected to boost the fetus-nourishing health of the placenta. Credit Image by Helen Jones/University of Florida Usage Restrictions None License Original 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.