Infiltration of CD163-positive macrophages in glioma tissues after treatment with anti-PD-L1 antibody and role of PI3Kγ inhibitor as a combination therapy with anti-PD-L1 antibody in in vivo model using temozolomide-resistant murine glioma-initiating cells

Tsubasa Miyazaki, Eiichi Ishikawa, Masahide Matsuda, Narushi Sugii, Hedihiro Kohzuki, Hiroyoshi Akutsu, Noriaki Sakamoto, Shingo Takano, Akira Matsumura