1174 Costimulatory IgM T-cell engagers with enhanced and durable cytotoxicity by Yue Wang, Jie Xue, Umesh Muchhal, Keyu Li, Angus Sinclair, Poonam Yakkundi, Rodnie Rosete, Bruce Keyt, Liqin Liu, Deepal Pandya, Vidhya Bai Krishnoji Rao, Elizabeth Perez, Paul Hinton, Gene Li, Kristene Mai, Nardeen Hanna, Zhongde Ye, Jinqiu Wang, Tina Mao, Palak Chudasama, Sachi Rahman, Zee Malik, Krzysztof Bzymek