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Strontium ranelate increases osteoblast activity
Monica Marletti Almeida1, Edson Parra Nani1, Lucas Novaes Teixeira2
1Laboratory of Immunology and Molecular Biology, São Leopoldo Mandic Institute and Research Center, Campinas, SP, Brazil.
Tissue & Cell
|May 10, 2016
Summary
Strontium ranelate (SR) promotes osteoblast differentiation and bone formation in vitro. While low doses are safe, high doses of SR decrease cell proliferation and viability but enhance bone marker expression.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Osteoporosis treatment aims to stimulate bone formation and inhibit resorption.
- Strontium ranelate (SR) is a novel osteoporosis medication with anabolic and antiresorptive properties.
Purpose of the Study:
- To investigate the in vitro effects of strontium ranelate (SR) on osteoblastic cell cultures.
- To evaluate SR's impact on cell proliferation, viability, osteoblastic marker expression, and matrix mineralization.
Main Methods:
- MC3TE-E1 osteoblastic cells were exposed to varying concentrations of SR (0.05, 0.1, 0.5mM).
- Assays included cell counting, MTT assay, Western Blotting, ELISA, Real Time PCR, epifluorescence, and Alizarin Red staining.
- Evaluated parameters: cell proliferation, viability, Type I Collagen, Osteopontin (OPN), fibronectin (FN) expression, and matrix mineralization.
Main Results:
- SR at 0.05 and 0.1mM did not affect cell proliferation or viability.
- SR at 0.5mM significantly decreased cell proliferation and viability.
- SR treatment increased Type I Collagen and OPN expression and promoted matrix mineralization in a dose-dependent manner.
- SR facilitated fibronectin expression in osteoblastic cells.
Conclusions:
- Strontium ranelate (SR) accelerates osteoblastic differentiation and enhances bone formation markers in vitro.
- SR rebalances bone turnover towards formation, particularly at higher concentrations.
- Results suggest SR's potential as an effective osteoporosis treatment by promoting osteoblast activity.
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