T cell-based immunotherapy targeting MAGE-A3 protein was found safe and showed early clinical responses in patients with a variety of metastatic cancers.
http://journals.lww.com/oncology-times/Fulltext/2016/06250/Immunotherapy_Study_Targeting_MAGE_A3_Protein.8.aspx
Immunotherapy Study Targeting MAGE-A3 Protein Shows Responses