Abstract
The non-small cell lung cancer (NSCLC) accounts for about 85% of all lung cancers. It is usually diagnosed at an advanced stage with poor prognosis. Nimbolide (NB), a terpenoid limonoid isolated from the flowers and leaves of neem tree, possesses anticancer properties in various cancer cell lines. However, the underlying mechanism of its anticancer effect on human NSCLC cells remains unclear. In the present study, we investigated the effect of NB on A549 human NSCLC cells. We found that NB treatment inhibits A549 cells colony formation in a dose-dependent manner. Mechanistically, NB treatment increases cellular reactive oxygen species (ROS) level, leading to endoplasmic reticulum (ER) stress, DNA damage, and eventually induction of apoptosis in NSCLC cells. Furthermore, all these effects of NB were blocked by pretreatment with antioxidant glutathione (GSH), the specific ROS inhibitor. We further knockdown CHOP protein by siRNA markedly reduced NB-induced apoptosis in A549 cells. Taken together, our findings reveal that NB is an inducer of ER stress and ROS; these findings may contribute to increasing the therapeutic efficiency of NSCLC.








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Abbreviations
- 53BP1:
-
Tumor protein p53 binding protein 1
- ATF4:
-
Activating transcription factor 4
- Bax:
-
Bcl2-associated protein x
- Bcl2:
-
B-cell lymphoma 2
- DCFH-DA:
-
2′,7′-Dichlorodihydrofluorescein diacetate
- DSB:
-
Double-strand break
- EGFR:
-
Epidermal growth factor receptor
- ER:
-
Endoplasmic reticulum
- FITC:
-
Fluorescein isothiocyanate
- GSH:
-
Glutathione
- HRP:
-
Horseradish peroxidase
- MTT:
-
3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- NB:
-
Nimbolide
- NSCLC:
-
Non-small cell lung cancer
- PI:
-
Propidium iodide
- ROS:
-
Reactive oxygen species
- STAT3:
-
Signal transducer and activator of transcription 3
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Funding
This study was supported by the Medical Health Science and Technology Project of Zhejiang Provincial Health Commission (No. 2021KY399) and the Science and Technology Plan Project of Taizhou (No. 22ywb83).
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This work was carried out in collaboration among all authors. X C, JB W, and N Z contributed to the literature search and study design. X C, JB W, and G C participated in the drafting of the article. X C, N Z, HS Z, and YZ P carried out the experiments. JB W and LS Z revised the manuscript. IB W, HS Z, and YZ P contributed to data collection and analysis. All authors have read and approved the final manuscript.
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Chen, X., Zhang, H., Pan, Y. et al. Nimbolide Exhibits Potent Anticancer Activity Through ROS-Mediated ER Stress and DNA Damage in Human Non-small Cell Lung Cancer Cells. Appl Biochem Biotechnol 196, 182–202 (2024). https://doi.org/10.1007/s12010-023-04507-9
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DOI: https://doi.org/10.1007/s12010-023-04507-9