Figure 1 (IMAGE) Institute for Basic Science Caption MAO-B and GABA were found to be present in the joint fibroblast-like synoviocytes cells (FLSs), and the expression of MAO-B and GABA was associated with the degree of inflammation. Credit Institute for Basic Science Usage Restrictions Attribution 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.