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Updated: May 22, 2025
Visualization of IL-22-expressing Lymphocytes Using Reporter Mice
Published on: January 25, 2017
IL-22/IL-22R1 pathway enhances cholangiocarcinoma progression via ERK1/2 activation
Jin Zhou1, Jing-Rui Chen1, Jin-Ming Li1
1The First Central Clinical School, Tianjin Medical University, Tianjin 300192, China.
Background:
IL-22 plays a pivotal role in the processes of inflammation and tissue healing., but its role in cholangiocarcinoma (CCA) remains unclear. our study explored the IL-22/IL-22R1 pathway and its impact on CCA progression through the ERK1/2 signaling cascade.
Aim:
To determine the mechanism of the IL-22/IL-22R1 pathway in CCA and provide new directions for its clinical treatment.
Methods:
IL-22R1 expression was assessed in human and rat CCA tissues utilizing immunohistochemical techniques, Western blot analysis, and quantitative reverse transcription PCR. The impact of IL-22 on CCA cells was assessed in vitro via tests for proliferation, migration, invasion, and apoptosis assays. The rat models of thioacetamide-induced CCA and subcutaneous xenografts in nude mice were used to assess the in vivo effects. ERK1/2 inhibitors were applied to elucidate the mechanistic role of the pathway.
Results:
IL-22R1 was overexpressed in CCA cell lines and tissues. IL-22 treatment increased the phosphorylation of ERK1/2, promoting tumor cell proliferation, migration, invasion, and resistance to apoptosis. ERK1/2 inhibition considerably reversed these effects both in vitro and in vivo.
Conclusion:
The IL-22/IL-22R1 axis promotes CCA progression by activating ERK1/2 signaling. Targeting this pathway with ERK1/2 inhibitors offers potential therapeutic strategies for CCA.
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