Triptolide induces apoptosis of glioma cells by inhibiting NF-κB activation during oxidative stress

Abstract

Glioma is a common and fatal malignant primary brain tumor. Radiotherapy and first-line chemotherapy have little effect on the survival rate of patients, requiring alternative therapies. The main active ingredient of Tripterygium wilfordii Hook. F. triptolide (TP) has been shown to have anti-inflammatory and anti-proliferative properties, along with a wide range of anticancer activities. This study aimed to investigate the molecular mechanisms of triptolide in glioma treatment through network pharmacology and experimental validation. Cell viability was first assessed using Cell Counting Kit-8 (CCK8), followed by cell scratch assay and cell migration ability. Apoptosis-related markers, including TUNEL staining, Bcl-2-associated X protein (Bax), and B-cell lymphoma-2 (Bcl-2), were detected. Network pharmacology was used to predict the key targets of glioma, detect its signal pathways, screen the key components and targets for molecular docking, and explore the signaling pathways of TP. Lastly, immunofluorescence assays and ELISA were performed to elucidate the underlying mechanistic pathways. The network pharmacology data suggested that TP may inhibit glioma proliferation by regulating the signaling pathway of the nuclear factor kappa-B (NF-κB). The results showed that the underlying mechanism involved the regulation of the NF-κB signaling pathway to promote the generation of reactive oxygen species, thereby enhancing oxidative stress response and promoting cell apoptosis.