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Life sciences · Journal article
Biomolecules · September 10, 2026
Early or partial results. Treat as a signal, not a conclusion.
This is an in vitro mechanistic study demonstrating that panduratin A (PA), a natural chalcone compound, induces apoptosis and G1-phase cell-cycle arrest in two NSCLC cell lines, with enhanced cytotoxicity when combined with TNF-α. The work is exploratory and lacks quantified effect sizes, animal validation, or clinical relevance; the authors acknowledge that further disease-relevant models are needed before therapeutic translation.
Uncontrolled in vitro cell biology study. Two established human NSCLC cell lines (A549 and H1299). Intervention: Panduratin A (PA), a chalcone from Boesenbergia rotunda, alone or in combination with TNF-α. Compared with: Single-agent treatment (PA alone or TNF-α alone); untreated control implied but not explicitly stated.
PA reduced cell number and induced cell death in both A549 and H1299 NSCLC cell lines Co-treatment with TNF-α increased apoptosis compared with PA or TNF-α alone PA increased G1-phase fraction and reduced thymidine kinase and cyclin A2 expression in a concentration-dependent manner
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In vitro mechanistic study in two cell lines showing PA-induced apoptosis and cell-cycle arrest; no animal models, clinical outcomes, or quantified effect sizes reported; authors themselves call for further validation in more disease-relevant models.
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Background: Non-small-cell lung cancer (NSCLC) is a major cause of cancer-related mortality. Current therapies are limited by drug resistance and adverse effects, highlighting the need for new strategies. Panduratin A (PA), a chalcone from Boesenbergia rotunda, has reported anticancer activity. This study investigated the effects of PA in NSCLC cells and whether PA enhances tumor necrosis factor alpha (TNF-α)-associated cell death. Methods: Human NSCLC cell lines A549 and H1299 were treated with PA alone or in combination with TNF-α. Cytotoxicity and apoptosis were assessed using cell-viability assays, cell-number analysis, and flow cytometry. Western blotting was used to evaluate caspase-3 activation and PARP-1 cleavage. Cell-cycle distribution was analyzed to determine the impact of PA on cell-cycle progression. Results: PA reduced cell number and induced cell death in both A549 and H1299 cells, and co-treatment with TNF-α increased apoptosis compared with single-agent treatment. PA increased the G1-phase fraction and, in a concentration-dependent manner, reduced expression of thymidine kinase and cyclin A2, consistent with a G1-associated arrest phenotype. Combination treatment also increased the sub-G1 population. Conclusions: PA promotes apoptosis in NSCLC cells and enhances TNF-α-associated apoptotic cell death in vitro, accompanied by a G1-associated cell-cycle phenotype. These findings provide an in vitro framework for studying natural compounds as modulators of TNF-α-driven apoptosis and support further mechanistic validation in more disease-relevant models.
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