Shen Q, Zou S, Sheng B, Zhao M, Sun LZ, Zhu X. Mifepristone inhibits IGF-1 signaling pathway in the treatment of uterine leiomyomas.
DRUG DESIGN DEVELOPMENT AND THERAPY 2019;
13:3161-3170. [PMID:
31564832 PMCID:
PMC6731989 DOI:
10.2147/dddt.s212157]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 08/07/2019] [Indexed: 12/11/2022]
Abstract
Purpose
To investigate the role of IGF-1 signaling pathway in the treatment of uterine leiomyomas with mifepristone.
Patients and methods
From October 2015 to December 2018, 50 patients with uterine leiomyoma were included in this study. Overexpression or siRNA of IGF-1 in primary human uterine leiomyoma cells were treated with or without mifepristone. MTT was used to evaluate cell viability in assays of cell proliferation and cytotoxicity. IGF-1 expression in the cells was measured with real-time RT-PCR and Western blotting and manipulated with lentivirus ectopic overexpression or siRNA silencing.
Results
Inhibition of cell viability by mifepristone was found dependent on drug concentration and treatment time. IGF-1 and phosphorylation-ERK1/2 expression were decreased, while phosphorylation-AKT expression was increased after mifepristone treatment. IGF-1 significantly promoted cell growth, while IGF-1 knockdown and mifepristone showed synergistic inhibition effects on cell growth. The overexpression of IGF-1 reversed the inhibition of cell growth and ERK1/2 phosphorylation but showed no effect on AKT phosphorylation.
Conclusion
Our study for the first time demonstrated that IGF-1 signaling via ERK1/2 appears to be an important target of mifepristone in the treatment of uterine leiomyomas, which may provide a new approach to avoid leiomyoma re-growth after cessation of mifepristone.
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