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<p>Although most immunotherapy research focuses on T cells, increasing evidence highlights the significant role of tumor-infiltrating B lymphocytes (TIL-Bs) in cancer therapy. CSDE1 has been implicated in various cancers and immune responses. This study investigates the role of CSDE1 in lung cancer progression and its impact on the tumor immune microenvironment. We found that CSDE1 promotes lung cancer progression in vivo but not in vitro. Using the tumor-bearing mice model with <i>Csde1</i> knockout, we demonstrated that <i>Csde1</i> deletion significantly inhibited tumor growth. Single-cell RNA sequencing revealed that <i>Csde1</i> knockout reshaped the tumor immune microenvironment, particularly by significantly increasing TIL-B levels, a finding confirmed by flow cytometry and immunofluorescence. Moreover, <i>Csde1</i> knockout enhanced B-cell-mediated humoral immunity. Notably, depleting B cells in <i>Csde1</i> knockout mice reversed the inhibitory effect of <i>Csde1</i> deletion on tumor progression, underscoring the critical role of B cells in this process. These findings suggest that CSDE1 facilitates tumor progression by modulating TIL-Bs and the broader immune microenvironment. This study provides a new potential target and valuable insights into tumor immunotherapy, emphasizing the importance of B cells in cancer treatment strategies.</p>

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CSDE1 depletion inhibits tumor progression through enhancing B-cell infiltration in NSCLC

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月6日

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  • Wanting Li,
  • Shijian Xiang,
  • Ke Liu,
  • Yang Wang,
  • Qiuqi Li,
  • Qianying OuYang,
  • Yan Zhan,
  • Bing Yu,
  • Hui Chen,
  • Bingchen Ge,
  • Jiajia Cui,
  • Jiye Yin,
  • Aoxiang Guo

摘要

Although most immunotherapy research focuses on T cells, increasing evidence highlights the significant role of tumor-infiltrating B lymphocytes (TIL-Bs) in cancer therapy. CSDE1 has been implicated in various cancers and immune responses. This study investigates the role of CSDE1 in lung cancer progression and its impact on the tumor immune microenvironment. We found that CSDE1 promotes lung cancer progression in vivo but not in vitro. Using the tumor-bearing mice model with Csde1 knockout, we demonstrated that Csde1 deletion significantly inhibited tumor growth. Single-cell RNA sequencing revealed that Csde1 knockout reshaped the tumor immune microenvironment, particularly by significantly increasing TIL-B levels, a finding confirmed by flow cytometry and immunofluorescence. Moreover, Csde1 knockout enhanced B-cell-mediated humoral immunity. Notably, depleting B cells in Csde1 knockout mice reversed the inhibitory effect of Csde1 deletion on tumor progression, underscoring the critical role of B cells in this process. These findings suggest that CSDE1 facilitates tumor progression by modulating TIL-Bs and the broader immune microenvironment. This study provides a new potential target and valuable insights into tumor immunotherapy, emphasizing the importance of B cells in cancer treatment strategies.