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Adult Zebrafish Injury Models to Study the Effects of Prednisolone in Regenerating Bone Tissue
Published on: October 18, 2018
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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.
Environmental Toxicology and Pharmacology
|July 31, 2021
Summary
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.
