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04 April 2018 : Laboratory Research  

Cyclic Guanosine Monophosphate (cGMP)-Dependent Protein Kinase II Blocks Epidermal Growth Factor (EGF)/Epidermal Growth Factor Receptor (EGFR)-Induced Biological Effects on Osteosarcoma Cells

Dapeng Li1AEG*, Ye Hua1DE, Lu Jiang2CF, Yonghui Huang1BD, Jiawei Yue1CE, Yan Wu3AEG, Yongchang Chen3DF

DOI: 10.12659/MSM.905892

Med Sci Monit 2018; 24: LBR1997-2002

Abstract

BACKGROUND: The present work was performed to detect the potential inhibitory effect of cyclic guanosine monophosphate (cGMP)-dependent protein kinase II (PKG II) on epidermal growth factor (EGF) receptor-induced biological activity and related signal cascades in osteosarcoma cells.

MATERIAL AND METHODS: We transfected the osteosarcoma MG-63 cell line with an adenoviral vector encoding PKG II cDNA (Ad-PKGII) and incubated the transfected cells with 250 μM 8-pCPT-cGMP to activate the PKG II. We stimulated the MG-63 cells with100 ng/ml EGF, and then detected their proliferation using a CCK-8 assay. Transwell assay was used to examine MG-63 cell migration; and Western blot analysis was used to detect expression of matrix metalloproteinase 9 (MMP-9) and activation of ERK and Akt.

RESULTS: Stimulating cells by 100 ng/ml EGF promoted MG-63 cell proliferation and migration, ERK and Akt phosphorylation, and MMP-9 expression. These effects of EGF were inhibited in MG-63 cells infected with Ad-PKGII and incubated with 8-pCPT-cGMP.

CONCLUSIONS: Our results demonstrate that Ad-PKGII infection significantly inhibited EGF-induced proliferation and migration, as well as the associated-signal cascades; which indicates that PKG II might be a potential anti-cancer factor.

Keywords: Cyclic GMP-Dependent Protein Kinase Type II, Epidermal Growth Factor, Receptor, Epidermal Growth Factor, Transcellular Cell Migration

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750