Activation of Transforming Growth Factor Beta 1 Signaling in Gastric Cancer-associated Fibroblasts Increases Their Motility, via Expression of Rhomboid 5 Homolog 2, and Ability to Induce Invasiveness of Gastric Cancer Cells
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Summary
This summary is machine-generated.Cancer-associated fibroblasts (CAFs) promote diffuse-type gastric cancer (DGC) progression. We found RHOBBF2 in CAFs drives DGC cell motility and invasion by regulating transforming growth factor beta 1 (TGFB1) signaling, offering a potential therapeutic target.
Area Of Science
- Oncology
- Cell Biology
- Molecular Biology
Background
- Cancer-associated fibroblasts (CAFs) are key players in promoting tumor progression across various cancer types.
- Understanding the specific roles and molecular mechanisms of CAFs in diffuse-type gastric cancer (DGC) is crucial for developing targeted therapies.
Purpose Of The Study
- To investigate the characteristics and functions of CAFs in diffuse-type gastric cancers (DGCs).
- To analyze the genomic and gene expression patterns of CAFs in DGC.
- To identify specific molecular pathways and targets within CAFs that contribute to DGC progression.
Main Methods
- Isolation and molecular characterization of CAFs and adjacent non-cancer fibroblasts (NFs) from gastric cancer tissues.
- Whole-exome and RNA sequencing to compare gene expression profiles between CAFs and NFs.
- Functional assays including cell motility, invasiveness, and in vivo studies using mouse models.
Main Results
- CAFs exhibited increased expression of genes associated with transforming growth factor beta 1 (TGFB1) activity compared to NFs.
- CAFs demonstrated enhanced motility and promoted increased motility and invasiveness of DGC cells in vitro and in vivo.
- Rhomboid 5 homolog 2 (RHBDF2) was identified as a key gene overexpressed in CAFs, regulating TGFB1 signaling and fibroblast motility.
Conclusions
- RHBDF2 is overexpressed in CAFs from DGC and regulates TGFB1 signaling, enhancing CAF motility.
- CAF-secreted inflammatory cytokines (IL1A, IL1B, TNF) induce RHBDF2 expression in fibroblasts.
- RHBDF2-mediated CAF motility contributes to DGC cell invasion of extracellular matrix and lymphatic vessels.