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Wu M, Mu C, Yang H, Wang Y, Ma P, Li S, Wang Z, Lan T. 8-Br-cGMP suppresses tumor progression through EGFR/PLC γ1 pathway in epithelial ovarian cancer. Mol Biol Rep 2024; 51:140. [PMID: 38236447 DOI: 10.1007/s11033-023-09037-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 11/28/2023] [Indexed: 01/19/2024]
Abstract
BACKGROUND Cyclic guanosine monophosphate (cGMP)-dependent protein kinase I (PKG-I), a serine/threonine kinase, is important in tumor development. The present study determines that the cGMP/PKG I pathway is essential for promoting cell proliferation and survival in human ovarian cancer cells, whereas cGMP analog has been shown to lead to growth inhibition and apoptosis of various cancer cells. The role of cGMP/PKG I pathway in epithelial ovarian cancer (EOC), therefore, remains controversial. We investigated the effect of cGMP/PKG I pathway and the underlying mechanism in EOC. METHODS AND RESULTS The results showed that exogenous 8-Bromoguanosine-3', 5'-cyclic monophosphate (8-Br-cGMP) (cGMP analog) could antagonize the effects by EGF, including suppressing proliferation, invasion and migration of EOC cells. In vivo, 8-Br-cGMP hampered the growth of the xenograft tumor. Additionally, the expressions of epidermal growth factor receptor (EGFR), matrix metallopeptidase 9 (MMP9), proliferating cell nuclear antigen and Ki67 in xenograft tumor were decreased after 8-Br-cGMP intervention. Further research demonstrated that 8-Br-cGMP decreased the phosphorylation of EGFR (Y992) and downstream proteins phospholipase Cγ1 (PLC γ1) (Y783), calmodulin kinase II (T286) and inhibited cytoplasmic Ca2+ release as well as PKC transferring to cell membrane. It's worth noting that the inhibition was 8-Br-cGMP dose-dependent and 8-Br-cGMP showed similar inhibitory effect on EOC cells compared with U-73122, a specific inhibitor of PLC γ1. CONCLUSIONS The activation of endogenous PKG I by addition of exogenous 8-Br-cGMP could inhibit EOC development probably via EGFR/PLCγ1 signaling pathway. 8-Br-cGMP/PKG I provide a new insight and strategy for EOC treatment.
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Affiliation(s)
- Min Wu
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Chunyan Mu
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China
| | - Huiwen Yang
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China
| | - Yue Wang
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China
| | - Ping Ma
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China
- Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Shibao Li
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China
- Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Zhongcheng Wang
- Department of Pathophysiology, School of Basic Medical Sciences, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China.
| | - Ting Lan
- Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, Jiangsu, China.
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, People's Republic of China.
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