Fig. 5
From: Near-infrared light-triggered nano-prodrug for cancer gas therapy
a Schematic illustration of PPPPB-CO-TPZ NPs with enhanced bioreductive chemotherapy and CO-mediated pro-apoptotic gas therapy. Reproduced with permission from Ref [95]. Copyright 2019, Elsevier Ltd. b Design of a controlled CO delivery nanomaterial for improving cancer therapy. Reproduced with permission from Ref [98]. Copyright 2020, American Chemical Society