(IMAGE) Ritsumeikan University Caption In a new study, researchers from Japan found that aromatic clusters on the extracellular receptor Siglec-14 found on macrophages recognized carbon nanotubes and then mediated an immune reaction to them Credit Masafumi Nakayama from Ritsumeikan University, Japan Usage Restrictions Attribution is required. 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.