Jennifer E Kim, Ryan P Lee, Eli Yazigi, Lyla Atta, James Feghali, Ayush Pant, Aanchal Jain, Idan Levitan, Eileen Kim, Kisha Patel, Nivedha Kannapadi, Pavan Shah, Adnan Bibic, Zhipeng Hou, Justin M Caplan, L Fernando Gonzalez, Judy Huang, Risheng Xu, Jean Fan, Betty Tyler, Henry Brem, Vassiliki A Boussiotis, Lauren Jantzie, Shenandoah Robinson, Raymond C Koehler, Michael Lim, Rafael J Tamargo, Christopher M Jackson
Acute cerebral ischemia triggers a profound inflammatory response. While macrophages polarized to an M2-like phenotype clear debris and facilitate tissue repair, aberrant or prolonged macrophage activation is counterproductive to recovery. The inhibitory immune checkpoint Programmed Cell Death Protein 1 (PD-1) is upregulated on macrophage precursors (monocytes) in the blood after acute cerebrovascular injury. To investigate the therapeutic potential of PD-1 activation, we immunophenotyped circulating monocytes from patients and found that PD-1 expression was upregulated in the acute period after stroke...
December 7, 2023: Brain, Behavior, and Immunity