PMID- 37772585 OWN - NLM STAT- MEDLINE DCOM- 20231023 LR - 20231023 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 43 IP - 10 DP - 2023 Oct TI - Immunological Responses Associated With Neoadjuvant Therapy in the Tumor Microenvironment of Esophageal Squamous Cell Carcinoma. PG - 4691-4700 LID - 10.21873/anticanres.16665 [doi] AB - BACKGROUND/AIM: Development of multidisciplinary therapies including immune checkpoint inhibitors for esophageal squamous cell carcinoma (ESCC) requires a clear understanding of immunological responses induced by chemotherapy with/without radiotherapy in the tumor microenvironment. PATIENTS AND METHODS: This is a retrospective analysis of paired pretreatment biopsy samples and surgically resected tumor samples of 49 patients who underwent radical surgery for ESCC with/without neoadjuvant therapy at Fukushima Medical University Hospital. The cohort included 30 patients treated with neoadjuvant chemotherapy (NAC), 11 treated with neoadjuvant chemoradiotherapy (NACRT), and eight who underwent surgery alone and did not receive neoadjuvant antitumor therapy. Chemotherapy included fluoropyrimidine- and platinum-based agents in all treated patients, and radiotherapy included 40 or 42 Gy administered in 20 or 21 fractions. Expression of CD8, human leukocyte antigen (HLA) class I-ABC, PD-L1, PD-L2, CEACAM-1, LSECtin, and p-STAT1, were determined using immunohistochemistry. RESULTS: The frequency of tumor-infiltrating CD8(+) T cells was significantly increased by NAC (p<0.05), and the expression of HLA class I-ABC on tumor cells was significantly increased by NAC and NACRT (p<0.05). Furthermore, the ESCC cells expressed PD-L1, PD-L2, and CEACAM-1, whereas the expression of PD-L1 on ESCC cells was significantly correlated with the expression of p-STAT1 in ESCC cells (p<0.05). CONCLUSION: NAC and NACRT induced both positive and negative immunological responses in patients with ESCC. These results may be a part of basis for multidisciplinary therapy including immune checkpoint inhibitors for patients with advanced ESCC. CI - Copyright (c) 2023 International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. FAU - Takehara, Yuka AU - Takehara Y AD - Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Tamaki, Tomoaki AU - Tamaki T AD - Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Mimura, Kosaku AU - Mimura K AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. AD - Department of Blood Transfusion and Transplantation Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Saito, Katsuharu AU - Saito K AD - Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Neupane, Prajwal AU - Neupane P AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Tada, Takeshi AU - Tada T AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Watanabe, Yohei AU - Watanabe Y AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Hayase, Suguru AU - Hayase S AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Saze, Zenichiro AU - Saze Z AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Yoshimoto, Yuya AU - Yoshimoto Y AD - Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Sato, Hisashi AU - Sato H AD - Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Kono, Koji AU - Kono K AD - Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. FAU - Suzuki, Yoshiyuki AU - Suzuki Y AD - Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan ysuzu@fmu.ac.jp. LA - eng PT - Journal Article PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (B7-H1 Antigen) RN - 0 (Immune Checkpoint Inhibitors) SB - IM MH - Humans MH - *Esophageal Squamous Cell Carcinoma/pathology MH - Neoadjuvant Therapy/methods MH - *Esophageal Neoplasms/drug therapy/pathology MH - B7-H1 Antigen/metabolism MH - CD8-Positive T-Lymphocytes MH - Retrospective Studies MH - Tumor Microenvironment MH - Immune Checkpoint Inhibitors/pharmacology MH - Prognosis OTO - NOTNLM OT - CD8 OT - Esophageal cancer OT - HLA class I OT - neoadjuvant treatment EDAT- 2023/09/29 12:43 MHDA- 2023/10/23 01:18 CRDT- 2023/09/29 07:31 PHST- 2023/07/29 00:00 [received] PHST- 2023/09/03 00:00 [revised] PHST- 2023/09/04 00:00 [accepted] PHST- 2023/10/23 01:18 [medline] PHST- 2023/09/29 12:43 [pubmed] PHST- 2023/09/29 07:31 [entrez] AID - 43/10/4691 [pii] AID - 10.21873/anticanres.16665 [doi] PST - ppublish SO - Anticancer Res. 2023 Oct;43(10):4691-4700. doi: 10.21873/anticanres.16665.