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Anti-Cancer Agents in Medicinal Chemistry

Editor-in-Chief

ISSN (Print): 1871-5206
ISSN (Online): 1875-5992

Research Article

Punicic Acid Inhibits Glioblastoma Migration and Proliferation via the PI3K/AKT1/mTOR Signaling Pathway

Author(s): Mesut Mete*, Ulkun U. Unsal, Işıl Aydemir, Pınar K. Sönmez and Mehmet I. Tuglu

Volume 19 , Issue 9 , 2019

Page: [1120 - 1131] Pages: 12

DOI: 10.2174/1871520619666190405112507

Price: $65

Abstract

Background: Punicic Acid (PA) is a polyunsaturated fatty acid that accounts for approximately 70%- 80% of Pomegranate Seed Oil (PSO). PA possesses strong antioxidant, anti-inflammatory, anti-atherogenic effects, and anti-tumorigenic properties. Pomegranate extracts have been shown to have anticancer activity in many studies. However, there is no evidence for the effect of PSO on T98 glioblastoma cells. Therefore, the present study was the first to investigate the mechanisms induced by PA on T98 cells, which is one of the major compounds extracted from PSO.

Methods: The effects of PA on cell viability; oxidative stress; and migration, proliferation, and apoptosis at the IC50 dose were studied.

Results: The proliferation and migration were inhibited in the treated group compared to the non-treated group by 9.85µl/ml PA. The difference was statistically significant (***p<0.001). Furthermore, PA-induced apoptosis in the T98 glioblastoma cells compared to non-treated group and the difference was statistically significant (***p<0.001). Apoptosis was determined via immunocytochemistry staining of caspase-3, caspase-9 and TUNEL methods. Apoptosis was checked by flow cytometry (using caspase 3 methods) and Scanning Electron Microscopy Analysis. We also investigated the potential signaling pathway underlying this apoptotic effect. The immunocytochemical stainings of PI3K/ Akt-1/ mTOR-1 demonstrated that Akt-1 staining was increased with PA treatment similar to mTOR-1 and PI3K staining (***p<0.001). These increases were statistically significant compared to the non-treated group.

Conclusion: PA exhibited exceptional abilities as an anticancer agent against GBM cells. The use of punicic acid in combination with other drugs used in the treatment of glioblastoma may increase the efficacy of the treatment. This study provided a basis for future investigation of its use in preclinical and clinical studies.

Keywords: Punicic acid, glioblastoma, PI3K/AKT1/mTOR, signaling pathway, glioblastoma multiforme, tumor infiltration, apoptosis.

Graphical Abstract
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