CCAAT/enhancer-binding protein α decreases the viability of gastric cancer cells

Tomizawa,Minoru; Shinozaki,Fuminobu; Motoyoshi,Yasufumi; Sugiyama,Takao; Yamamoto,Shigenori; Ishige,Naoki

doi:10.3892/ol.2017.5987

CCAAT/enhancer-binding protein α decreases the viability of gastric cancer cells

Authors:
- Minoru Tomizawa
- Fuminobu Shinozaki
- Yasufumi Motoyoshi
- Takao Sugiyama
- Shigenori Yamamoto
- Naoki Ishige
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Affiliations: Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan, Department of Neurosurgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284‑0003, Japan
Published online on: April 5, 2017 https://doi.org/10.3892/ol.2017.5987
Pages: 4322-4326

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Abstract

CCAAT/enhancer-binding protein (C/EBP) α, C/EBPβ and C/EBPδ are involved in inflammation and cell differentiation. In the present study, their roles in human gastric cancer cells were investigated. The human gastric cancer cell lines MKN45 and MKN74 were subjected to the reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) to analyze the expression levels of C/EBPα,C/EBPβ and C/EBPδ. The cells were transfected with expression plasmids for either C/EBPα or C/EBPδ, and subjected to a 3-(4,5-dimethylthiazol-2-yl)‑5‑(3‑carboxymethoxyphenyl)‑2‑(4‑sulfophenyl)‑2H‑tetrazolium inner salt (MTS) assay and RT‑qPCR for analysis of cyclin D1 expression. Expression levels of C/EBPα and C/EBPδ were decreased in MKN45 and MKN74 cells compared with in normal gastric tissue. Expression levels of C/EBPβ were decreased in MKN45 cells and increased in MKN74 cells. Viability of MKN45 cells was decreased by C/EBPα and C/EBPδ. Viability of MKN74 cells was decreased by C/EBPα, but increased by C/EBPδ. Expression levels of cyclin D1 were decreased in association with C/EBPα and C/EBPδ overexpression in MKN45 cells. Expression levels of cyclin D1 were decreased in association with C/EBPα overexpression, but increased in association with C/EBPδ overexpression, in MKN74 cells. The results of the present study indicate that C/EBPα is potentially useful for the treatment of gastric cancer.

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