Fig.1 (IMAGE) Osaka University Caption Schematic diagram of this study. B-1a cells in meningeal space secrete natural antibodies, which promote the proliferation of oligodendrocyte precorsors. With this mechanism, B-1a cells support the brain development. Credit Osaka University Usage Restrictions None 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.