4.6 Article

Hedgehog Signaling Non-Canonical Activated by Pro-Inflammatory Cytokines in Pancreatic Ductal Adenocarcinoma

期刊

JOURNAL OF CANCER
卷 7, 期 14, 页码 2067-2076

出版社

IVYSPRING INT PUBL
DOI: 10.7150/jca.15786

关键词

pancreatic ductal adenocarcinoma; hedgehog signaling; hyperplasia stroma; TNF-alpha; IL-1 beta

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资金

  1. National Natural Science Foundation of China [81272663, 81472279, 30910103911]
  2. Shanghai Science and Technology Committee Major Project on Basic Research [11441901800]
  3. Shanghai Municipal Bureau of Health Research Topic

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Hedgehog(HH) pathway is found to be activated through a manner of canonical, or the non-canonical HH pathways. Distinct hyperplasia stroma around tumor cells is supposed to express pro-inflammatory cytokines abundantly, such as tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 beta (IL-1 beta), etc. in pancreatic ductal adenocarcinoma (PDAC) tissues. In this study we observed the effects of TNF-alpha and IL-1 beta on HH pathway activation in PDAC cells, and explored their activation manners. Our results showed that pro-inflammatory cytokines, TNF-alpha and IL-1 beta, could up-regulate the expression of GLI1 gene, increase its nuclear protein expression and promote malignant cell behaviors including migration, invasion, epithelial-mesenchymal transition (EMT) and drug resistance as well. Moreover, GLI1 promoter-reporter assay in combination with blocking either NF-kappa B or Smoothened (SMO) suggested that TNF-alpha and IL-1 beta could transcriptionally up-regulate expression of GLI1 completely via NF-kappa B, whereas ablation of SMO could not completely attenuate the regulation effects of TNF-alpha and IL-1 beta on GLI1 expression. Collectively, our results indicated that TNF-alpha and IL-1 beta in hyperplasia stroma can promote the PDAC cell development by activating HH pathway, through both the canonical and non-canonical HH activation ways.

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