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Updated: Oct 26, 2025
Adult Zebrafish Injury Models to Study the Effects of Prednisolone in Regenerating Bone Tissue
Published on: October 18, 2018
Prednisolone suppresses collagen-encoding gene expression causing cartilage defects in zebrafish larvae
Yu Jiang1, Ning Xin2, Jian Yang3
1Department of Orthopedics, The Affiliated Wuxi No. 2 People's Hospital of Nanjing Medical University, Wuxi, 214000, China; The Affiliated Wuxi Clinical College of Nantong University, Jiangsu, 214000, China.
Abstract:
Glucocorticoid-induced osteoporosis (GIOP) is a clinically important disease. Despite many studies, the intrinsic pathogenesis of GIOP is still not fully understood. Cartilage is the target tissue of the glucocorticoid prednisolone (PN). To explore the intrinsic mechanism of PN-induced cartilage damage, we performed cartilage staining and cell transfection experiments in zebrafish larvae treated with PN. The results showed that PN caused cartilage damage in zebrafish at 25 μM. Moreover, after treatment with PN, it was found that collagen-encoding gene expression was significantly reduced. Further research revealed that the glucocorticoid receptor (GR) mediates the transcriptional inhibition of collagen genes by PN. These results indicate that glucocorticoids cause cartilage damage by inhibiting the expression of collagen genes through their receptors. Our study provides new insights into GIOP.
Insights
Glucocorticoids like prednisolone damage cartilage by reducing collagen gene expression via glucocorticoid receptors. This finding offers new insights into glucocorticoid-induced osteoporosis pathogenesis.
Area of Science:
- Biomedical Science
- Molecular Biology
- Zebrafish Research
Background:
- Glucocorticoid-induced osteoporosis (GIOP) is a significant clinical condition.
- The precise molecular mechanisms underlying GIOP remain incompletely understood.
- Cartilage is identified as a primary target tissue for glucocorticoids such as prednisolone.
Purpose of the Study:
- To investigate the intrinsic molecular mechanisms of prednisolone-induced cartilage damage.
- To elucidate how prednisolone affects cartilage at the cellular and genetic levels.
Main Methods:
- Zebrafish larvae were utilized as a model organism.
- Cartilage staining techniques were employed to assess structural integrity.
- Cell transfection experiments were conducted to study gene expression.
- Zebrafish were treated with varying concentrations of prednisolone (PN).
Main Results:
- Prednisolone induced significant cartilage damage in zebrafish at a concentration of 25 μM.
- Treatment with prednisolone led to a notable decrease in the expression of collagen-encoding genes.
- The glucocorticoid receptor (GR) was identified as the mediator of PN's inhibitory effect on collagen gene transcription.
Conclusions:
- Glucocorticoids induce cartilage damage by suppressing collagen gene expression through their receptors.
- This mechanism provides a novel understanding of the pathogenesis of glucocorticoid-induced osteoporosis.
- The study highlights the role of collagen synthesis inhibition in glucocorticoid-induced cartilage pathology.
