Abstract
Phytocompounds have shown hopeful results in cancer therapy. Piperlongumine (PIP), a naturally derived bioactive alkaloid found in our dietary spice, exhibits promising pharmacological relevance including anticancer activity. This study reconnoitred the anti-lung cancer effect of PIP and the allied mechanisms, in vitro and ex vivo. The cytotoxic, anti-proliferative, and apoptotic effects of PIP on lung cancer cells (LCC) were checked via cell viability, colony formation, cell migration, invasion, comet assay, and various staining techniques. Further, multicellular spheroids assay explored the anti-lung cancer potential of PIP, ex vivo. Preliminary results explored that PIP exerts selective cytotoxic and anti-proliferative effects on LCC by DNA damage and cell cycle arrest. PIP remarkably escalated the cellular and mitochondrial reactive oxygen species (ROS) generation and promoted dissipation of mitochondrial membrane potential (MMP), which triggers activation of caspase-dependent apoptotic pathway in LCC. Mechanistically, PIP showed F-actin deformation mediated significant anti-migratory and anti-invasive activity against LCC. Herein, we also found that F-actin dis-organization modulates the expression of epithelial to mesenchymal transition (EMT) markers and inhibits the expression of stemness marker proteins, like SOX9, CD-133, and CD-44. Moreover, PIP effectively reduced the size of spheroids with strong apoptotic and cytotoxic effects, ex vivo. This has been the first study to discover the high expression of SOX9 supporting the survival of LCC, whereas its inhibition induces higher sensitivity to PIP treatment. This study concludes a newer therapeutic agent (PIP) with promising anticancer activity against LCC by escalating ROS and attenuating MMP, stemness, and EMT.
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The data that support the findings of this study are available on request from the corresponding author.
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Funding
This research work is supported by the project (Grant Number: ECR/2016/000792) under the Department of Science and Technology, Science and Engineering Research Board (DST, SERB), New Delhi, India, and Department of Science and Technology, Odisha, India, (Grant no-1201).
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SKT and BKB designed the research. SKT conducted all the experiments and analyzed data. SKT and RKS prepared the manuscript. All authors read and approved the manuscript. The authors declare that all data were generated in-house and that no paper mill was used.
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Tripathi, S.K., Sahoo, R.K. & Biswal, B.K. Exposure of piperlongumine attenuates stemness and epithelial to mesenchymal transition phenotype with more potent anti-metastatic activity in SOX9 deficient human lung cancer cells. Naunyn-Schmiedeberg's Arch Pharmacol (2024). https://doi.org/10.1007/s00210-024-02965-4
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DOI: https://doi.org/10.1007/s00210-024-02965-4