Unveiling the oncogenic role of CLDN11-secreting fibroblasts in gastric cancer peritoneal metastasis through...

Area of Science:

• Oncology
• Cancer Biology
• Cellular Interactions

Background:

• Fibroblasts are crucial in cancer progression.
• The specific role of fibroblasts in gastric cancer peritoneal metastasis (PM) is not well understood.
• This study investigates fibroblast-mediated interactions in gastric cancer PM.

Purpose of the Study:

• To elucidate the function of fibroblasts in gastric cancer peritoneal metastasis.
• To identify key molecular pathways and cell types involved in this process.
• To explore potential therapeutic targets for gastric cancer with PM.

Main Methods:

• Analysis of single-cell sequencing data (GSE183904) to identify fibroblast clusters.
• Extraction and characterization of fibroblasts from gastric cancer and peritoneal metastasis tissues.
• Validation of CXCR7 expression and investigation of CLDN11's role using in vitro and in vivo models.
• Assessment of the tumor microenvironment using multiple immunohistochemistry.

Main Results:

• CXCR7-positive fibroblasts are significantly enriched in gastric cancer peritoneal metastasis.
• CXCR7 activation of the AKT pathway in fibroblasts upregulates CLDN11 expression.
• Fibroblasts promote gastric cancer proliferation and peritoneal metastasis via CLDN11 secretion.
• CXCR7-positive fibroblasts correlate with M2-type macrophage infiltration.

Conclusions:

• CXCR7-positive fibroblasts are key drivers of gastric cancer peritoneal metastasis through CLDN11.
• Targeting CXCR7-positive fibroblasts or CLDN11 presents a promising therapeutic strategy for gastric cancer with PM.