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E26 transformation-specific 1 is implicated in the inhibition of osteogenic differentiation induced by chronic high
Wenqian Xia1,2,3, Xiao Han1, Lin Wang2
1Key Laboratory of Human Functional Genomics of Jiangsu Province, Nanjing Medical University, Nanjing, Jiangsu 211166, China.
Abstract:
Chronic high glucose (HG) plays a crucial role in the pathogenesis of diabetes-induced osteoporosis by inhibiting the differentiation and proliferation of osteoblasts. This study aims to examine the role of E26 transformation-specific 1 (ETS1) in the inhibition of osteoblast differentiation and proliferation caused by chronic HG, as well as the underlying mechanism. Chronic HG treatment downregulated ETS1 expression and inhibited differentiation and proliferation of MC3T3-E1 cells. Downregulation of ETS1 expression inhibited the differentiation and proliferation of MC3T3-E1 cells under normal glucose conditions, and ETS1 overexpression attenuated the damage to cells exposed to chronic HG. In addition, ETS1 overexpression reversed the decrease in runt-related transcription factor 2 (Runx2) expression in MC3T3-E1 cells treated with chronic HG. Using chromatin immunoprecipitation (ChIP) and luciferase reporter assays, we confirmed that ETS1 directly bound to and increased the activity of the Runx2 promoter. In summary, our study suggested that ETS1 was involved in the inhibitory effect of chronic HG on osteogenic differentiation and proliferation and may be a potential therapeutic target for diabetes-induced osteoporosis.
Insights
High glucose levels impair bone health by inhibiting osteoblast function. This study reveals E26 transformation-specific 1 (ETS1) plays a key role in this process and may be a therapeutic target for diabetes-induced osteoporosis.
Area of Science:
- Molecular Biology
- Cell Biology
- Endocrinology
Background:
- Chronic high glucose (HG) is implicated in diabetes-induced osteoporosis.
- HG inhibits osteoblast differentiation and proliferation, crucial for bone formation.
- The precise molecular mechanisms linking HG to impaired osteogenesis require further elucidation.
Purpose of the Study:
- To investigate the role of E26 transformation-specific 1 (ETS1) in HG-induced inhibition of osteoblast differentiation and proliferation.
- To elucidate the underlying molecular mechanisms by which ETS1 influences osteogenesis under high glucose conditions.
Main Methods:
- MC3T3-E1 osteoblast cell line was treated with chronic high glucose (HG).
- ETS1 expression levels were analyzed.
- Chromatin immunoprecipitation (ChIP) and luciferase reporter assays were employed to assess ETS1's interaction with the runt-related transcription factor 2 (Runx2) promoter.
Main Results:
- Chronic HG treatment downregulated ETS1 expression and inhibited MC3T3-E1 cell differentiation and proliferation.
- ETS1 downregulation mimicked HG effects, while ETS1 overexpression protected cells from HG-induced damage.
- ETS1 directly bound to and enhanced the activity of the Runx2 promoter, reversing HG-induced decreases in Runx2 expression.
Conclusions:
- ETS1 is involved in the inhibitory effects of chronic HG on osteogenic differentiation and proliferation.
- ETS1 acts, at least partly, by regulating Runx2 promoter activity.
- ETS1 represents a potential therapeutic target for managing diabetes-induced osteoporosis.
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