PMID- 37584709 OWN - NLM STAT- MEDLINE DCOM- 20231027 LR - 20231027 IS - 1432-1335 (Electronic) IS - 0171-5216 (Linking) VI - 149 IP - 16 DP - 2023 Nov TI - PTPN3 inhibition contributes to the activation of the dendritic cell function to be a promising new immunotherapy target. PG - 14619-14630 LID - 10.1007/s00432-023-05250-8 [doi] AB - PURPOSE: In a previous study, protein tyrosine phosphatase non-receptor type (PTPN) 3 was identified as an immune checkpoint molecule in lymphocytes, and its potential as a novel target for cancer immunotherapy was anticipated. However, evaluation of dendritic cell (DC) function as antigen-presenting cells is critical for the development of immunotherapy. In this study, we aimed to analyze the biological effect of PTPN3 on DCs induced from human peripheral blood monocytes obtained from healthy individuals. METHODS: We used short-interfering RNA to knock down PTP3 in DCs. For DC maturation, we added cancer cell lysate and tumor necrosis factor-alpha/interferon-alpha to immature DCs. In the cytotoxic assay, the target cancer cells were SBC5, unmatched with DCs from healthy human leukocyte antigen (HLA)-A24, or Sq-1, matched with DCs. Enzyme-linked immunosorbent assay was used to determine the amount of cytokines. To examine the intracellular signaling system, intracellular staining was used. RESULTS: PTPN3 knockdown significantly increased the number of DCs, expression of CD80 and chemokine receptor (CCR)7, and production of interleukin-12p40/p70 in mature DCs. In the HLA-A24-restricted DC and human lung squamous cell carcinoma cell cytotoxic assay, inhibition of PTPN3 expression in mature DCs induced cytotoxic T lymphocytes with increased production of INF-gamma and granzyme B, and enhanced toxicity against cancer cells and migration to cancer. Furthermore, inhibition of PTPN3 expression activated the mitogen-activated protein kinase pathway in DCs. CONCLUSION: Based on our findings, inhibition of PTPN3 expression could contribute to the development of novel cancer immunotherapies that activate not only lymphocytes but also DCs. CI - (c) 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. FAU - Iwamoto, Naoya AU - Iwamoto N AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Onishi, Hideya AU - Onishi H AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. ohnishi.hideya.928@m.kyushu-u.ac.jp. FAU - Masuda, Shogo AU - Masuda S AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Imaizumi, Akira AU - Imaizumi A AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Sakanashi, Keita AU - Sakanashi K AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Morisaki, Shinji AU - Morisaki S AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Nagao, Shinjiro AU - Nagao S AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Koga, Satoko AU - Koga S AD - Department of Cancer Therapy and Research, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan. FAU - Ozono, Keigo AU - Ozono K AD - Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. FAU - Umebayashi, Masayo AU - Umebayashi M AD - Fukuoka General Cancer Clinic, Fukuoka, 812-0018, Japan. FAU - Morisaki, Takashi AU - Morisaki T AD - Fukuoka General Cancer Clinic, Fukuoka, 812-0018, Japan. FAU - Nakamura, Masafumi AU - Nakamura M AD - Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. LA - eng PT - Journal Article DEP - 20230816 PL - Germany TA - J Cancer Res Clin Oncol JT - Journal of cancer research and clinical oncology JID - 7902060 RN - 0 (Cytokines) RN - 0 (Interleukins) RN - EC 3.1.3.48 (PTPN3 protein, human) RN - EC 3.1.3.48 (Protein Tyrosine Phosphatase, Non-Receptor Type 3) SB - IM MH - Humans MH - *Dendritic Cells MH - Cytokines/metabolism MH - T-Lymphocytes, Cytotoxic MH - Interleukins MH - *Neoplasms/metabolism MH - Immunotherapy MH - Protein Tyrosine Phosphatase, Non-Receptor Type 3/metabolism OTO - NOTNLM OT - Anticancer immunotherapy OT - Immune checkpoint OT - MAPK pathway OT - Mature dendritic cell OT - PTPN3 EDAT- 2023/08/16 12:42 MHDA- 2023/10/27 06:43 CRDT- 2023/08/16 11:05 PHST- 2023/06/24 00:00 [received] PHST- 2023/08/04 00:00 [accepted] PHST- 2023/10/27 06:43 [medline] PHST- 2023/08/16 12:42 [pubmed] PHST- 2023/08/16 11:05 [entrez] AID - 10.1007/s00432-023-05250-8 [pii] AID - 10.1007/s00432-023-05250-8 [doi] PST - ppublish SO - J Cancer Res Clin Oncol. 2023 Nov;149(16):14619-14630. doi: 10.1007/s00432-023-05250-8. Epub 2023 Aug 16.