Scholarlink

Background <p>Signal-regulatory protein alpha (SIRPα) has recently garnered attention for its role in the immune system, commonly referred to as the “don’t eat me” signal. However, the relationship between SIRPα expression in tumor cells and prognosis in patients undergoing hepatectomy for intrahepatic cholangiocarcinoma (ICC) has been scarcely reported. </p> Patients and Methods <p>A total of 117 patients who underwent hepatectomy for ICC were enrolled in this study. Immunohistochemical staining was performed to evaluate SIRPα, programmed cell death-ligand 1 (PD-L1), and cluster of differentiation 8 (CD8). The relationships between SIRPα expression, clinicopathological characteristics, and patient outcomes were analyzed. </p> Results <p>The macrophage-SIRPα-positive group exhibited a higher rate of lymph node metastasis (<i>p</i> = 0.0013). The tumor-cell-SIRPα-positive group showed lower carcinoembryonic antigen levels (<i>p</i> = 0.0068) and fewer cases of the perihilar type (<i>p</i> = 0.0165). In multivariate analysis, SIRPα positivity in tumor cells was identified as an independent prognostic factor for both disease-free survival (<i>p</i> = 0.0198) and overall survival (<i>p</i> = 0.0089). Notably, SIRPα positivity in tumor cells showed no significant correlation with PD-L1 expression or CD8-positive tumor-infiltrating T cells in ICC.</p> Conclusions <p>Our findings demonstrate that SIRPα expression in tumor cells is more critical than its expression in macrophages for predicting the prognosis of patients with ICC following hepatic resection.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Expression of Signal Regulatory Protein Alpha in Tumor Cells is the Key Factor in Intrahepatic Cholangiocarcinoma

  • 期刊论文

  • 发表日期：

    2025年7月12日

查看全文
  • Katsuya Toshida,
  • Shinji Itoh,
  • Yuki Nakayama,
  • Kyohei Yugawa,
  • Takuma Ishikawa,
  • Yuriko Tsutsui,
  • Takahiro Tomiyama,
  • Norifumi Iseda,
  • Sunao Fujiyoshi,
  • Takashi Motomura,
  • Takeo Toshima,
  • Takeshi Iwasaki,
  • Yoshinao Oda,
  • Tomoharu Yoshizumi

摘要

Background

Signal-regulatory protein alpha (SIRPα) has recently garnered attention for its role in the immune system, commonly referred to as the “don’t eat me” signal. However, the relationship between SIRPα expression in tumor cells and prognosis in patients undergoing hepatectomy for intrahepatic cholangiocarcinoma (ICC) has been scarcely reported.

Patients and Methods

A total of 117 patients who underwent hepatectomy for ICC were enrolled in this study. Immunohistochemical staining was performed to evaluate SIRPα, programmed cell death-ligand 1 (PD-L1), and cluster of differentiation 8 (CD8). The relationships between SIRPα expression, clinicopathological characteristics, and patient outcomes were analyzed.

Results

The macrophage-SIRPα-positive group exhibited a higher rate of lymph node metastasis (p = 0.0013). The tumor-cell-SIRPα-positive group showed lower carcinoembryonic antigen levels (p = 0.0068) and fewer cases of the perihilar type (p = 0.0165). In multivariate analysis, SIRPα positivity in tumor cells was identified as an independent prognostic factor for both disease-free survival (p = 0.0198) and overall survival (p = 0.0089). Notably, SIRPα positivity in tumor cells showed no significant correlation with PD-L1 expression or CD8-positive tumor-infiltrating T cells in ICC.

Conclusions

Our findings demonstrate that SIRPα expression in tumor cells is more critical than its expression in macrophages for predicting the prognosis of patients with ICC following hepatic resection.