Figure 1 (IMAGE) Kanazawa University Caption MHC class I and PD-L1 expression in the muscle tissue, as detected by immunohistochemistry. MHC class I and PD-L1 expression was upregulated in the sarcolemmal and sarcoplasmic regions in patients with myositis and myasthenia gravis. There was no overexpression of MHC class I and PD-L1 in muscle tissues obtained from patients with non-myopathy. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. 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.