1. Cyclic Guanosine Monophosphate (cGMP)-Dependent Protein Kinase II Blocks Epidermal Growth Factor (EGF)/Epidermal Growth Factor Receptor (EGFR)-Induced Biological Effects on Osteosarcoma Cells.
- Author
-
Li D, Hua Y, Jiang L, Huang Y, Yue J, Wu Y, and Chen Y
- Subjects
- Bone Neoplasms enzymology, Bone Neoplasms pathology, Cell Line, Tumor, Cell Movement physiology, Cell Proliferation physiology, Cyclic GMP metabolism, Cyclic GMP-Dependent Protein Kinase Type II biosynthesis, Cyclic GMP-Dependent Protein Kinase Type II genetics, Epidermal Growth Factor metabolism, Epidermal Growth Factor pharmacology, ErbB Receptors metabolism, Humans, Osteosarcoma enzymology, Osteosarcoma pathology, Phosphorylation, Protein Binding, Signal Transduction, Transfection, Bone Neoplasms metabolism, Cyclic GMP-Dependent Protein Kinase Type II metabolism, Epidermal Growth Factor antagonists & inhibitors, ErbB Receptors antagonists & inhibitors, Osteosarcoma metabolism
- 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.
- Published
- 2018
- Full Text
- View/download PDF