Retinoic acid inhibits pancreatic cancer cell migration and EMT through the downregulation of IL-6 in cancer associated fibroblast cells

Cancer Letters
Jian GuanJie Chen

Abstract

Retinoic acid (RA) is a small molecular derivative of vitamin A that is stored in quiescent stellate cells in pancreas stroma. Cancer associated fibroblasts (CAFs) are activated fibroblast cells in pancreatic ductal adenocarcinoma tumor microenvironment. We treated CAFs with RA and found that these cells became static due to the low expression of α-SMA, FAP, and IL-6 and decreased production of extracellular matrix (ECM). Furthermore, we verified that the low secretion of IL-6 from CAFs was related to RA-induced inhibition of migration and epithelial-mesenchymal transition (EMT) of tumor cells. However, RA could not inhibit the migration and EMT of tumor cells directly. Therefore, our study showed that one of the therapeutic effects of RA on tumor cells is through its modulation of CAFs in tumor microenvironment. The tumor microenvironment plays an important role in promoting tumor migration and might be a promising target of biological treatment.

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Mar 20, 2016·Biochimica Et Biophysica Acta·Valerie Sloane JonesRuo-Pan Huang
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