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Background <p>Activation of cancer-associated fibroblasts (CAFs) plays an important role in tumor metastasis. The purpose of this study is to investigate the role of POU6F2 in conversion of hepatic stellate cells (HSCs) into CAFs in liver metastasis of gastric adenocarcinoma (GAC).</p> Methods <p>POU6F2 expression was examined by real-time PCR, Western blot and immunohistochemical staining. The functional roles of POU6F2 in GAC liver metastasis were investigated both cellular experiments in vitro and in vivo using a mouse model of subcutaneous splenic injection. ChIP and ELISA assays were used to explore the underlying molecular mechanism of POU6F2 in liver metastasis of GAC.</p> Results <p>Here we reported that POU6F2 was upregulated in GAC tissue with liver metastasis, which predicted poor early liver metastasis. Upregulating POU6F2 promoted EMT, invasion and migration of GAC cells in vitro, and the liver metastasis of GAC cells in vivo. Mechanic investigation further revealed that upregulating POU6F2 promoted the invasion and metastasis of GAC by transcriptional upregulation of EMT-inducer SNAI1, and promoting the conversion of HSCs into CAFs dependent on transcriptional upregulation of IGF2-induced activation of PI3K/AKT signaling.</p> Conclusion <p>Our findings uncover a novel dual mechanism by which POU6F2 promotes liver metastasis of GAC.</p>

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POU6F2 promotes liver metastasis of gastric adenocarcinoma by dual mechanism of transcriptional upregulation of SNAI1 and IGF2/PI3K/AKT signaling-induced conversion of hepatic stellate cells into cancer-associated fibroblasts

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • Chunxiao Yang,
  • Zhiqing Gao,
  • Ruiming Tang,
  • Lihuan Zhou,
  • Ping Zhou,
  • Wangpan Shi,
  • Dong Ren,
  • Han Chen,
  • Zhuojun Zhang,
  • Xiaoyi Xie,
  • Jiaqian Lin,
  • Yingming Ye,
  • Zhengfu Feng,
  • Xiaoli Feng,
  • Yaoming He,
  • Yaofeng Zhi,
  • Dongmei Liu,
  • Xin Zhang,
  • Lili Jiang

摘要

Background

Activation of cancer-associated fibroblasts (CAFs) plays an important role in tumor metastasis. The purpose of this study is to investigate the role of POU6F2 in conversion of hepatic stellate cells (HSCs) into CAFs in liver metastasis of gastric adenocarcinoma (GAC).

Methods

POU6F2 expression was examined by real-time PCR, Western blot and immunohistochemical staining. The functional roles of POU6F2 in GAC liver metastasis were investigated both cellular experiments in vitro and in vivo using a mouse model of subcutaneous splenic injection. ChIP and ELISA assays were used to explore the underlying molecular mechanism of POU6F2 in liver metastasis of GAC.

Results

Here we reported that POU6F2 was upregulated in GAC tissue with liver metastasis, which predicted poor early liver metastasis. Upregulating POU6F2 promoted EMT, invasion and migration of GAC cells in vitro, and the liver metastasis of GAC cells in vivo. Mechanic investigation further revealed that upregulating POU6F2 promoted the invasion and metastasis of GAC by transcriptional upregulation of EMT-inducer SNAI1, and promoting the conversion of HSCs into CAFs dependent on transcriptional upregulation of IGF2-induced activation of PI3K/AKT signaling.

Conclusion

Our findings uncover a novel dual mechanism by which POU6F2 promotes liver metastasis of GAC.