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Lambertianic Acid Sensitizes Non-Small Cell Lung Cancers to TRAIL-Induced Apoptosis via Inhibition of XIAP/NF-κB and Activation of Caspases and Death Receptor 4. | LitMetric

AI Article Synopsis

  • Lambertianic acid (LA) has been studied for its effects on non-small cell lung cancer cells (NSCLCs) when combined with TRAIL, showing increased cancer cell death.
  • The combination treatment significantly raised levels of cleaved PARP and activated caspases, while reducing antiapoptotic proteins like Bcl-2 and FLIP, promoting apoptosis.
  • The results suggest that LA enhances TRAIL-induced apoptosis by inhibiting XIAP/NF-κB signaling in TRAIL-resistant cancer cells.

Article Abstract

Lambertianic acid (LA) is a biologically active compound from the leaves of In the present study, apoptotic mechanisms of LA plus TNF-related apoptosis-inducing ligand (TRAIL) were elucidated in non-small cell lung cancer cells (NSCLCs). Cytotoxicity assay, flow cytometry, immunoprecipitation, and Western blotting were performed. Here, combined treatment of LA and TRAIL increased cytotoxicity, sub-G1 population, cleaved poly (ADP-ribose) polymerase (PARP), and caspase3/8/9 in A549 and H1299 cells compared to LA or TRAIL alone. Furthermore, combined treatment of LA and TRAIL significantly decreased antiapoptotic proteins such as B-cell lymphoma 2 (Bcl-2), Fas-like inhibitor protein (FLIP), and X-linked inhibitor of apoptosis protein (XIAP), and enhanced the activation of proapoptotic proteins Bid compared to LA or TRAIL alone. In addition, combined treatment of LA and TRAIL upregulated the expression of Death receptor 4 (DR4) and downregulated phosphorylation of nuclear factor κ-light-chain-enhancer of activated B cells (p-NF-κB), inhibitory protein of kB family (p-IκB), and FLIP in A549 and H1299 cells along with disrupted binding of XIAP with caspase3 or NF-κB. Overall, these findings suggest that lambertianic acid enhances TRAIL-induced apoptosis via inhibition of XIAP/NF-κB in TRAIL resistant NSCLCs.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5983579PMC
http://dx.doi.org/10.3390/ijms19051476DOI Listing

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