Abstract
Background
Gastric cancer (GC) is a malignancy that belongs to one of the most common leading causes of cancer death. Cancer-associated fibroblasts (CAFs) promote the GC cells’ malignant behavior. It is still unknown how GC converts normal fibroblasts (NFs) to CAFs.
Methods
GC cells were co-cultured with NFs. Bioinformatics was used to analyze the genes and signaling pathways that were changed in fibroblast. RT-PCR, western blot, and Elisa assays were used to detect the expression of cytokines in fibroblast and condition medium. Western blot and immunofluorescence demonstrated activation of relevant pathways in CAFs-like cells. Transwell, scrape, colony formation, and CCK-8 assays were performed to reveal the feedback effect of CAFs-like cells on GC cells.
Results
GC promoted the conversion of NFs to CAFs by secreting Interleukin 17A (IL-17). It included both morphological and molecular marker changes. This process was achieved by activating the nuclear factor-κB (NF-κB) pathway. On the other hand, CAFs cells could secrete C-X-C Motif Chemokine Ligand 8 (IL-8, IL-8), which promoted the malignant phenotype of GC cells. In this way, a feedback loop of mutual influence was constructed in the GC and tumor microenvironment (TME).
Conclusions
Our research proved a novel model of GC-educated NFs. GC-IL-17-fibroblast-IL-8-GC axis might be a potential pathway of the interaction between GC and TME.
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Data availability
No additional data are available.
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Cao, XK., Xie, B., Shao, Y. et al. Cytokine-driven positive feedback loop organizes fibroblast transformation and facilitates gastric cancer progression. Clin Transl Oncol 24, 1354–1364 (2022). https://doi.org/10.1007/s12094-022-02777-z
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DOI: https://doi.org/10.1007/s12094-022-02777-z