Kimio Yonesaka, Koji Haratani, Shiki Takamura, Hitomi Sakai, Ryoji Kato, Naoki Takegawa, Takayuki Takahama, Kaoru Tanaka, Hidetoshi Hayashi, Masayuki Takeda, Sigeki Kato, Osamu Maenishi, Kazuko Sakai, Yasutaka Chiba, Takafumi Okabe, Keita Kudo, Yoshikazu Hasegawa, Hiroyasu Kaneda, Michiko Yamato, Kenji Hirotani, Masaaki Miyazawa, Kazuto Nishio, Kazuhiko Nakagawa
Purpose: Anti-programmed-death-1 (PD-1) immunotherapy improves survival in non-small cell lung cancer (NSCLC), but some cases are refractory to treatment, thereby requiring alternative strategies. B7-H3, an immune-checkpoint molecule, is expressed in various malignancies. To our knowledge, this study is the first to evaluate B7-H3 expression in NSCLCs treated with anti-PD-1 therapy and the therapeutic potential of a combination of anti-PD-1 therapy and B7-H3 targeting. Experimental Design: B7-H3 expression was evaluated immunohistochemically in patients with NSCLC ( n = 82), and its relationship with responsiveness to anti-PD-1 therapy and CD8+ tumor-infiltrating lymphocytes (TILs) was analyzed...
March 12, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research