PT  - JOURNAL ARTICLE
AU  - AYAKO OGO
AU  - SACHI MIYAKE
AU  - HISAKO KUBOTA
AU  - MASAHARU HIGASHIDA
AU  - HIDEO MATSUMOTO
AU  - FUSAKO TERAMOTO
AU  - TOSHIHIRO HIRAI
AU  - TOMIO UENO
TI  - The Mechanism of the Synergistic Anticancer Effect of CDDP and EPA in the TE1 Cell Line
AID  - 10.21873/anticanres.14942
DP  - 2021 Apr 01
TA  - Anticancer Research
PG  - 1771--1778
VI  - 41
IP  - 4
4099  - http://ar.iiarjournals.org/content/41/4/1771.short
4100  - http://ar.iiarjournals.org/content/41/4/1771.full
SO  - Anticancer Res2021 Apr 01; 41
AB  - Background/Aim: Eicosapentaenoic acid (EPA) is an unsaturated fatty acid with various bioactivities, including antitumor effects. We previously reported a synergistic antitumor effect of cisplatin (CDDP) and EPA. Here, we examined the underlying mechanism. Materials and Methods: The human oesophageal cancer cell line TE-1 was treated with the combination of EPA and CDDP. Nuclear translocation of NF-κB, a transcription factor involved in cytokine production, was detected by immunohistochemistry. IL-6 levels were measured by ELISA. Apoptosis and cell cycle distribution were evaluated by flow cytometry. Results: Nuclear translocation of NF-κB in TE-1 cells was synergistically decreased by CDDP and EPA. IL-6 production was increased following treatment with CDDP, but treatment with EPA decreased IL-6 levels. Apoptosis was synergistically induced by CDDP and EPA. A G2/M cell cycle arrest was observed with the combination of CDDP and 150 μM EPA, and S phase arrest with the combination of CDDP and 100 μM EPA. Conclusion: The combination of CDDP and EPA synergistically suppresses NF-κB nuclear translocation and increases apoptosis by inducing cell cycle arrest at the S or G2/M phase.