Rescue of exhausted CD8 T cells by PD-1-targeted therapies is CD28-dependent

Alice O. Kamphorst, Andreas Wieland, Tahseen Nasti, Shu Yang, Ruan Zhang, Daniel L. Barber, Bogumila T. Konieczny, Candace Z. Daugherty, Lydia Koenig, Ke Yu, Gabriel L. Sica, Arlene H. Sharpe, Gordon J. Freeman, Bruce R. Blazar, Laurence A. Turka, Taofeek K. Owonikoko, Rathi N. Pillai, Suresh S. Ramalingam, Koichi Araki, Rafi Ahmed