Anticancer and Antioxidant Effects of Sitagliptin and Linagliptin against Lung Cancer Cell Lines (an In vitro Study)

Ameer M. Al Khafaji; Ahsan F. Bairam

doi:10.26538/tjnpr/v8i5.14

Authors

Ameer M. Al Khafaji Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Kufa, Najaf, 00964, Iraq.
Ahsan F. Bairam Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Kufa, Najaf, 00964, Iraq.

DOI:

https://doi.org/10.26538/tjnpr/v8i5.14%20

Keywords:

sitagliptin, linagliptin, A549 cell line, cisplatin, antioxidant

Abstract

Lung cancer has the highest global fatality rate of all cancers, and most existing therapies have a wide range of toxic effects. This necessitates searching for new medications with potential anticancer properties and a better safety profile against normal cells. Dipeptidyl peptidase-4 (DPP4) inhibitors have recently shown anticancer efficacy in various malignancies such as colorectal, prostate, and renal cancer. Therefore, this study investigated the anticancer activity of sitagliptin (SITA) and linagliptin (LINA) against the lung cancer cell line A549 alone and in combination with cisplatin (CP). A549 cells were divided into six groups: control (untreated cells), CP-treated cells, SITA-treated cells, LINA-treated cells, CP plus SITA-treated cells (ratio 1:1), and CP plus LINA-treated cells (ratio 1:1). After 72 hours of incubation, a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) test was used to determine cell viability and the concentration of 50% inhibition for cell viability (IC₅₀) for each group. A549 cells were later seeded in six flasks and treated with the resulting IC₅₀; cell pellets were collected and lysed to determine the malondialdehyde (MDA) level using ELISA kits. SITA and LINA therapy dramatically reduced A549 cell viability compared to the control (P < 0.0001), with results comparable to CP. When SITA and LINA were combined with CP, they demonstrated significantly higher anticancer efficacy than when used alone. Notably, both medicines lowered MDA levels when taken alone or in combination with CP. SITA and LINA showed promising anticancer and antioxidant activity against A549 cells. This may indicate a potential synergistic anticancer effect with CP.

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