論文 - 詳細
| RRC ID | 41744 |
|---|---|
| 著者 | Mushtaq T, Farquharson C, Seawright E, Ahmed SF. |
| タイトル | Glucocorticoid effects on chondrogenesis, differentiation and apoptosis in the murine ATDC5 chondrocyte cell line. |
| ジャーナル | J Endocrinol |
| Abstract |
Glucocorticoids (GC) are used extensively in children and may cause growth retardation, which is in part due to the direct effects of GC on the growth plate. We characterised the ATDC5 chondrocyte cell line, which mimics the in vivo process of longitudinal bone growth, to examine the effects of dexamethasone (Dex) and prednisolone (Pred) during two key time points in the chondrocyte life cycle - chondrogenesis and terminal differentiation. Additionally, we studied the potential for recovery following Dex exposure. During chondrogenesis, Dex and Pred exposure at 10(-8) M, 10(-7) M and 10(-6) M resulted in a significant mean reduction in cell number (28% vs 20%), cell proliferation (27% vs 24%) and proteoglycan synthesis (47% vs 43%) and increased alkaline phosphatase (ALP) activity (106% vs 62%), whereas the incidence of apoptosis was unaltered. Minimal effects were noted during terminal differentiation with both GC although all concentrations of Dex lowered apoptotic cell number. To assess catch-up growth the cells were incubated for a total of 14 days which included 1, 3, 7, 10 or 14 days exposure to 10(-6) M Dex, prior to the recovery period. Recovery of proteoglycan synthesis was irreversibly impaired following just one day exposure to Dex. Although cell number showed a similar pattern, significant impairment was only achieved following 14 days exposure. Irreversible changes in ALP activity were only noticed following 10 days exposure to Dex. In conclusion, GC have maximal effects during chondrogenesis; Dex is more potent than Pred and cells exposed to Dex recover but this may be restricted due to differential effects of GC on specific chondrocyte phenotypes. |
| 巻・号 | 175(3) |
| ページ | 705-13 |
| 公開日 | 2002-12-1 |
| DOI | 10.1677/joe.0.1750705 |
| PMID | 12475381 |
| MeSH | Animals Apoptosis / drug effects Cell Count Cell Differentiation / drug effects Cell Division / drug effects Cell Line Chondrocytes / cytology* Chondrogenesis / drug effects* Collagen Type II / genetics Collagen Type X / genetics Dexamethasone / pharmacology* Glucocorticoids / pharmacology* Mice Prednisolone / pharmacology* RNA, Messenger / analysis Reverse Transcriptase Polymerase Chain Reaction Time Factors |
| IF | 4.041 |
| 引用数 | 60 |
| WOS 分野 | ENDOCRINOLOGY & METABOLISM |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | Patent(IFI CLAIMS) |
| 各媒体での言及数の合計 | 1 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| ヒト・動物細胞 | ATDC5(RCB0565) |