Overexpression of CD9 and CD82 (image) Rockefeller University Press Caption Electron microscopy of purified cell culture supernatants reveals that cells overexpressing CD9 (middle) or CD82 (right) produce more exosomes than control cells (left). Exosomal release of beta-catenin and inhibition of Wnt signaling may explain why CD82 and CD9 suppress tumor metastasis. Credit Chairoungdua, A., et al. 2010. J. Cell Biol. doi:10.1083/jcb.201002049. Usage Restrictions Reporters may freely use these materials in news coverage, with the appropriate credit information. 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.