Extraction of miRNA from Brain Exosomes (IMAGE) Brain Chemistry Labs Caption Schematic diagram of extraction of miRNA from brain exosomes shed into the bloodstream to produce an ALS fingerprint. Credit Michael Rothman Usage Restrictions Unrestricted license for use by journalists by Brain Chemistry Labs. 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.