Chemotherapeutic regulation of the ROS/MondoA-dependent TXNIP/GDF15 axis; and derivation of a new organoid metric as a predictive biomarker
Deng, J.; Pan, T.; Hong, Y.; Liu, Z.; Zhou, X.; An, Z.; Li, L.; Alfano, G.; Li, G.; Dolcetti, L.; Evans, R.; Vicencio, J. M.; Vlckova, P.; Chen, Y.; Monypenny, J.; Gomes, C.; Ng, K.; McCarthy, C.; Yang, X.; Hu, Z.; Porter, J. C.; Tape, C.; Yin, M.; Rodriguez-Justo, M.; Tejpar, S.; Beatson, R.; Ng, T.
Show abstract
Chemotherapy, the standard of care treatment for cancer patients with advanced disease, has been increasingly recognised to activate host immune responses to produce durable outcomes. Here, in colorectal adenocarcinoma (CRC) we identify chemotherapy-induced Thioredoxin Interacting Protein (TXNIP), a MondoA-dependent tumor suppressor gene, as a negative regulator of Growth/Differentiation Factor 15 (GDF15). GDF15 is a negative prognostic factor in CRC and promotes the differentiation of regulatory T cells (Tregs), through CD48 ligation. Intriguingly, multiple models including patient-derived tumor organoids demonstrate that loss of TXNIP/GDF15 axis functionality is associated with advanced disease or chemotherapeutic resistance, with transcriptomic or proteomic GDF15/TXNIP ratios showing potential as a prognostic biomarker. These findings illustrate a potentially common pathway where chemotherapy-induced epithelial stress drives local immune remodelling for patient benefit, with disruption of this pathway seen in refractory or advanced cases.
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