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Combined application of cisplatin and salicylic acid suppresses cell growth and promotes apoptosis in human lung cancer cell lines

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Abstract

Lung cancer is the leading cause of cancer-related deaths worldwide. Cisplatin-based chemotherapy remains the standard gold method in therapeutic strategy due to the high usefulness of cisplatin, the application, and the dosage of cisplatin regulated by its adverse effects on neurons. In addition, salicylic acid as a nonsteroidal anti-inflammatory drug has also been reported to treat another type of cancer by activating apoptosis mechanisms. In this research, the synergistic function of cisplatin and salicylic acid on apoptosis activity, cytotoxicity of lung cell lines A549 and Calu-6, and molecular expression level of ZEB1 and P21 genes were the main objectives. Lung carcinoma cell lines A549 and Calu-6 were exposed to different concentrations of cisplatin and salicylic acid alone and in combination to evaluate cell viability by MTT assay. Then, the optimal concentration of cisplatin (0.5 µM) in combination with salicylic acid (2 mM) for apoptotic cells was determined by flow cytometry. Real-time PCR was also performed to conduct the expression analysis of P21 and ZEB1 genes. The combination of the two drugs showed the highest inhibitory and anti-proliferation effects on A549 and Calu-6 cell lines (P ˂ 0.05; P ˂ 0.01, respectively). Gene expression analysis showed that the P21 gene was significantly downregulated in the Calu-6 cell lines and the ZEB1 gene was downregulated only in the A549 cell line (P = 0.01). ZEB1 was overexpressed in the Calu-6. The combined form of cisplatin and salicylic acid significantly suppressed cell proliferation and promoted apoptosis in lung cancer cell lines.

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All raw data are obtained from devices and presented in GraphPad prism software.

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Not applicable.

Abbreviations

A549:

Lung cancer cell line

Calu-6:

Lung cancer cell line

DMEM:

Dulbecco’s Modified Eagle’s Medium

FBS:

Fetal bovine serum

IC50:

The half-maximal inhibitory concentration

MTT:

3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide

OD:

Optical density

PBS:

Phosphate buffered saline

PI:

Propidium iodide

RT-PCR:

Real-time PCR

DMSO:

Dimethylsulfoxide

GAPDH:

Glyceraldehyde 3-phosphate dehydrogenase

V-FITC:

V-Fluorescein isothiocyanate

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Acknowledgements

The authors express their gratitude to the Islamic Azad University, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch (Tehran, Iran), and the colleagues who advised and supported this research.

Funding

This work was supported by the Islamic Azad University, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Tehran, Iran.

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Contributions

All authors contributed to the study conception and design. SM MADDAH done supervision, writing, and editing. G MOSTAFAVI performed reviewing and editing. M AMIN MALEK carried out methodology, writing-original draft preparation, and performed the experimental work performance. M ANBARESTANI, Y SHARIF, and Z MIR HASSANI carried out experiments and statistical analyses.

Corresponding author

Correspondence to Seyyedeh Mahdokht Maddah.

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On behalf of all authors, the corresponding author declare that there is no conflict of interest.

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Maddah, S.M., Mostafavi, G., Amin Malek, M. et al. Combined application of cisplatin and salicylic acid suppresses cell growth and promotes apoptosis in human lung cancer cell lines. Biologia 77, 215–223 (2022). https://doi.org/10.1007/s11756-021-00920-9

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  • DOI: https://doi.org/10.1007/s11756-021-00920-9

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