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Melatonin suppresses cancer cell proliferation, DNA repair and expression of the oncogene TRIP13
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Journal Article
Melatonin suppresses cancer cell proliferation, DNA repair and expression of the oncogene TRIP13
2025
Overview
Non-small cell lung cancer (NSCLC) continues to be a global health challenge, with limited treatment options and a high mortality rate. We recently found that lung cancer cells that express more genes that are typically restricted to the germline (germ cell cancer genes, GC genes) repair DNA double-strand breaks more rapidly, show higher rates of proliferation, and are more resistant to ionizing radiation, compared to cells that express fewer GC genes. Moreover, we found that the gene encoding TRIP13 (thyroid hormone receptor interactor 13) plays a significant role in this malignant phenotype. Here, we demonstrate that melatonin (MT), a hormone synthesized in the pineal gland, downregulates the expression of TRIP13, particularly in lung cancer cells with high expression of TRIP13. Moreover, this downregulation of TRIP13 by MT further inhibits the DNA repair proteins RAD51 and XRCC5, thereby impairing DNA repair via homologous recombination and non-homologous end joining. We further found that the melatonin receptor 1B (MTNR1B), rather than melatonin receptor 1 A (MTNR1A), is essential for MT mediated TRIP13 downregulation. Because we also found that treatment with MT still decreases cell proliferation of TRIP13-KO cells, combining MT with the TRIP13 inhibitor DCZ0415 would likely have an additive anti-proliferative therapeutic effect in the treatment of NSCLC.
Publisher
Nature Publishing Group UK,Springer Nature B.V,Nature Publishing Group
Subject
