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The Tn antigen is the most prevalent tumor-associated carbohydrate antigen. It interacts with macrophage galactose-specific lectin(MGL)on dendric cells and macrophages, driving immune inhibitory signals. Colorectal cancer(CRC)exhibiting deficient mismatch repair(dMMR)is characterized by tumor-infiltrating lymphocytes(TILs), the expression of immune checkpoint molecules, and immune evasion. We recently reported that Tn antigen expression was associated with dMMR and that dMMR CRCs with strong Tn antigen expression demonstrated CD8+ T cell exclusion and a lack of PD-L1 expression. Our findings suggest that the immune cold subset of dMMR CRCs with strong Tn antigen may be effectively treated with immune checkpoint blockade therapy or cellular immunotherapy targeting Tn antigens.


Takuro Matsumoto, Hirokazu Okayama, Hiroshi Nakano, Misato Ito, Shotaro Nakajima, Motonobu Saito, Zenichiro Saze, Tomoyuki Momma, Kosaku Mimura, Koji Kono. Immunotherapy Targeting Tumor-Associated Carbohydrate Antigens in Deficient Mismatch Repair Colorectal Cancer]. Gan to kagaku ryoho. Cancer & chemotherapy. 2021 Oct;48(10):1275-1277

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PMID: 34657062

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