Abstract
The immune microenvironment plays a pivotal role in cancer development and progression. Therefore, we studied the status of immune cells in esophageal adenocarcinoma (EAC) and adjacent Barrett’s esophagus (BE) and their association with the clinical course of patients. We included 87 patients with EAC who underwent surgical resection or endoscopic submucosal dissection. CD3, CD8, Foxp3, p53, and Ki-67 were immunolocalized in EAC and adjacent BE (N = 87) and BE without EAC (N = 13). BE adjacent to EAC exhibited higher CD3+ lamina propria lymphocyte (LPL) numbers than BE without EAC. Abundant Foxp3+ LPLs in BE were associated with dysplasia and increased Ki-67 labeling index (LI) in BE glandular cells and tended to link to aberrant p53 expression. Abundant CD8+ LPLs in adjacent BE were associated with worse prognosis of EAC patients (P = 0.019). Results of our present study firstly revealed the potential influence of the tissue immune microenvironment of BE adjacent to EAC on cancer development and eventual clinical outcome of EAC patients. T cell infiltration could play pivotal roles in facilitating the dysplasia–adenocarcinoma sequence in BE. The number of Foxp3+ T cells is increased at the early stage of carcinogenesis and could help identify patients harboring dysplastic and highly proliferating cells. CD8+ T cells could reflect unfavorable inflammatory response in adjacent tissue microenvironment and help predict worse prognosis of EAC patients.
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Abbreviations
- BE:
-
Barrett’s esophagus
- EAC:
-
esophageal adenocarcinoma
- EGJ:
-
esophagogastric junction
- ESD:
-
endoscopic submucosal dissection
- LPL:
-
lamina propria lymphocyte
- LSBE:
-
long-segment BE
- SSBE:
-
short-segment BE
- TIL:
-
tumor-infiltrating lymphocyte
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We would like to acknowledge Ms. Yayoi Aoyama and Ms. Yasuko Furukawa for technical support.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Yusuke Gokon, Fumiyoshi Fujishima, Hirotaka Ishida, Taku Yamagata, Takashi Sawai, Miwa Uzuki, Hirofumi Ichikawa, Yuko Itakura, Kazutomi Takahashi, Nobuhisa Yajima, Motohisa Hagiwara, Akiko Nishida, Yohei Ozawa, Tsutomu Sakuma, Rikiya Kanba, Kazuhiro Sakamoto, Masashi Zuguchi, and Masahiro Saito. The first draft of the manuscript was written by Yusuke Gokon and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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The study protocol was approved by the ethics committee or institutional review board of each participating institution (Accession number of Tohoku University Hospital 2017–1-325). Informed consent was obtained for experimentation with human subjects.
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Gokon, Y., Fujishima, F., Taniyama, Y. et al. Immune microenvironment in Barrett’s esophagus adjacent to esophageal adenocarcinoma: possible influence of adjacent mucosa on cancer development and progression. Virchows Arch 477, 825–834 (2020). https://doi.org/10.1007/s00428-020-02854-0
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DOI: https://doi.org/10.1007/s00428-020-02854-0