Abstract
Purpose
Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive disease with limited therapeutic options. The diversity and composition of the intratumoral microbiota are associated with PDAC outcomes, and modulating the tumor microbiota has the potential to influence tumor growth and the host immune response. Here, we explore whether intervention with butyrate-producing probiotics can limit PDAC progression.
Methods
Based on the TCGA (PAAD) database, we analyzed the differential communities of intratumoral microbiota in PDAC patients with long survival and short survival and explored the relevant mechanisms of Clostridium butyricum and its metabolite butyrate in the treatment of PDAC. Treatment with Clostridium butyricum or butyrate in combination with the ferroptosis inducer RSL3 in a PDAC mouse model has an inhibitory effect on PDAC progression. The potential molecular mechanisms were verified by flow cytometry, RNA-seq, Western blotting, qRT‒PCR and immunofluorescence.
Results
We found that the tumoral butyrate-producing microbiota was linked to a better prognosis and less aggressive features of PDAC. Intervention with Clostridium butyricum or its metabolite butyrate triggered superoxidative stress and intracellular lipid accumulation, which enhanced ferroptosis susceptibility in PDAC.
Conclusion
Our study reveals a novel antitumor mechanism of butyrate and suggests the therapeutic potential of butyrate-producing probiotics in PDAC.
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Data availability
The data that support the findings of this study are available from the corresponding author upon reasonable request (GSE227418).
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Funding
This work was supported by the National Natural Science Foundation of China (No. 81970553, No. 81770628, No. 82022049, J. X); Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant Support (No. 20161312, J.X.); Innovative Research Team of High-Level Local Universities in Shanghai (J.X.); 111 Projects (No. B21024, J.X.).
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J.X. and XT.Y. designed the experiment and interpreted the data; XT.Y. and ZY.Z. performed most of the experiments; XQ.S., JY.X. and YW.W. assisted in some experiments; W.W. provided the key materials and assisted in some discussion; J.X. and YX.T. wrote the manuscript; J.X. and W.W. provided overall guidance.
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All animal experiments were approved by the Animal Care and Use Committees at Ren Ji Hospital (RJ2020-0505), Shanghai Jiao Tong University School of Medicine.
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Yang, X., Zhang, Z., Shen, X. et al. Clostridium butyricum and its metabolite butyrate promote ferroptosis susceptibility in pancreatic ductal adenocarcinoma. Cell Oncol. 46, 1645–1658 (2023). https://doi.org/10.1007/s13402-023-00831-8
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DOI: https://doi.org/10.1007/s13402-023-00831-8