Related Experiment Video
Updated: May 2, 2026
Differentiation of Mouse Breast Epithelial HC11 and EpH4 Cells
Published on: February 27, 2020
Differentially expressed genes and signalling pathways are involved in mouse osteoblast-like MC3T3-E1 cells exposed
Zhen-Zhen Shang1, Xin Li2, Hui-Qiang Sun3
1Department of Prosthodontics, College of Stomatology, Shandong University, Jinan, China.
Abstract:
Oestrogen is essential for maintaining bone mass, and it has been demonstrated to induce osteoblast proliferation and bone formation. In this study, complementary DNA (cDNA) microarrays were used to identify and study the expression of novel genes that may be involved in MC3T3-E1 cells' response to 17-β estradiol. MC3T3-E1 cells were inoculated in minimum essential media alpha (α-MEM) cell culture supplemented with 17-β estradiol at different concentrations and for different time periods. MC3T3-E1 cells treated with 10⁻⁸ mol⋅L⁻¹ 17-β estradiol for 5 days exhibited the highest proliferation and alkaline phosphatase (ALP) activity; thus, this group was chosen for microarray analysis. The harvested RNA was used for microarray hybridisation and subsequent real-time reverse transcription polymerase chain reaction (RT-PCR) to validate the expression levels for selected genes. The microarray results were analysed using both functional and pathway analysis. In this study, microarray analysis detected 5403 differentially expressed genes, of which 1996 genes were upregulated and 3407 genes were downregulated, 1553 different functional classifications were identified by gene ontology (GO) analysis and 53 different pathways were involved based on pathway analysis. Among the differentially expressed genes, a portion not previously reported to be associated with the osteoblast response to oestrogen was identified. These findings clearly demonstrate that the expression of genes related to osteoblast proliferation, cell differentiation, collagens and transforming growth factor beta (TGF-β)-related cytokines increases, while the expression of genes related to apoptosis and osteoclast differentiation decreases, following the exposure of MC3T3-E1 cells to α-MEM supplemented with 17-β estradiol. Microarray analysis with functional gene classification is critical for a complete understanding of complementary intracellular processes. This microarray analysis provides large-scale gene expression data that require further confirmatory studies.
Insights
Oestrogen (estradiol) significantly impacts bone health by influencing osteoblast activity. This study used gene expression analysis to identify key genes involved in estradiol
Area of Science:
- Molecular Biology
- Cell Biology
- Bone Biology
Background:
- Oestrogen is crucial for bone mass maintenance and stimulates osteoblast proliferation and bone formation.
- Understanding the molecular mechanisms of oestrogen's effects on bone cells is vital for developing treatments for bone disorders.
Purpose of the Study:
- To identify novel genes involved in the response of MC3T3-E1 osteoblast cells to 17-β estradiol using complementary DNA (cDNA) microarrays.
- To analyze the functional and pathway-based implications of gene expression changes induced by estradiol in osteoblasts.
Main Methods:
- MC3T3-E1 cells were treated with 17-β estradiol at various concentrations and durations.
- Optimal conditions (10⁻⁸ mol⋅L⁻¹ for 5 days) were selected for microarray analysis of gene expression.
- Real-time reverse transcription polymerase chain reaction (RT-PCR) was used to validate selected gene expression levels.
Main Results:
- Microarray analysis identified 5403 differentially expressed genes, with 1996 upregulated and 3407 downregulated.
- Gene Ontology (GO) analysis revealed 1553 functional classifications, and pathway analysis identified 53 distinct pathways.
- Estradiol treatment increased expression of genes related to osteoblast proliferation, differentiation, collagens, and TGF-β cytokines, while decreasing genes associated with apoptosis and osteoclast differentiation.
Conclusions:
- Estradiol modulates a wide range of genes in osteoblasts, influencing processes critical for bone formation and maintenance.
- The study identified previously unreported genes involved in the oestrogen-osteoblast interaction.
- Large-scale gene expression data from microarray analysis provide a foundation for further research into oestrogen's role in bone biology.
