



![Image: D-serine is a metabolic byproduct that aids immune evasion by gastric cancer tumors. It increases immunosuppressive macrophage activity and reduces the numbers and function of cytotoxic T cells. This aids tumor growth and provides resistance against immune checkpoint inhibitor therapy. (Image Credit: Keio University Global Research Institute [KGRI]) Image: D-serine is a metabolic byproduct that aids immune evasion by gastric cancer tumors. It increases immunosuppressive macrophage activity and reduces the numbers and function of cytotoxic T cells. This aids tumor growth and provides resistance against immune checkpoint inhibitor therapy. (Image Credit: Keio University Global Research Institute [KGRI])](https://globetechcdn.com/mobile_labmedica/images/stories/articles/article_images/2026-08-08/294812420image.jpg)

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