中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (32): 6821-6827.doi: 10.12307/2026.525

• 骨组织构建 bone tissue construction •    下一篇

去铁胺减轻糖皮质激素抑制成骨分化的作用途径

唐昊旭1,2,梁英杰1,李  策1,丁鹏霖1,钱闵龙1,袁伶俐1   

  1. 1蚌埠医科大学第二附属医院骨科,安徽省蚌埠市  233002;2组织移植安徽省重点实验室,安徽省蚌埠市  233000
  • 收稿日期:2024-10-08 接受日期:2024-12-12 出版日期:2025-11-18 发布日期:2025-04-25
  • 通讯作者: 袁伶俐,硕士,副教授,主任医师,硕士生导师,蚌埠医科大学第二附属医院骨科,安徽省蚌埠市 233002
  • 作者简介:唐昊旭,男,1998年生,湖南省郴州市人,汉族,蚌埠医科大学在读硕士,主要从事骨相关研究。
  • 基金资助:
    安徽省高等学校自然科学研究项目(KJ2021A0756),项目负责人:袁伶俐;蚌埠医学院2023年度研究生科研创新计划(Byycxz23046),项目负责人:唐昊旭

Deferoxamine alleviates the inhibitory effect of glucocorticoids on osteogenic differentiation

Tang Haoxu1, 2, Liang Yingjie1, Li Ce1, Ding Penglin1, Qian Minlong1, Yuan Lingli1   

  1. 1Department of Orthopaedics, The Second Affiliated Hospital of Bengbu Medical University, Bengbu 233002, Anhui Province, China; 2Anhui Province key Laboratory of Tissue Transplantation, Bengbu 233000, Anhui Province, China
  • Received:2024-10-08 Accepted:2024-12-12 Online:2025-11-18 Published:2025-04-25
  • Contact: Yuan Lingli, Master, Associate professor, Chief physician, Master’s supervisor, Department of Orthopaedics, The Second Affiliated Hospital of Bengbu Medical University, Bengbu 233002, Anhui Province, China
  • About author:Tang Haoxu, Master candidate, Department of Orthopaedics, The Second Affiliated Hospital of Bengbu Medical University, Bengbu 233002, Anhui Province, China; Anhui Province key Laboratory of Tissue Transplantation, Bengbu 233000, Anhui Province, China
  • Supported by:
    Natural Science Research Project of Higher Education Institutions in Anhui Province, No. KJ2021A0756 (to YLL); Bengbu Medical University 2023 Graduate Student Research and Innovation Program, No. Byycxz23046 (to THX)

摘要:


文题释义:
低氧诱导因子1α:缺氧诱导因子由低氧诱导因子1α和低氧诱导因子1β 2个亚基组成,与缺氧应答元件相互作用,进而调控靶基因的表达,是细胞对缺氧反应的关键转录调节因子。低氧诱导因子1α作为骨组织工程的有效调节剂,可促进骨髓间充质干细胞的增殖和成骨分化。
去铁胺:是一种铁螯合剂,经美国食品药品监督管理局批准用于临床治疗铁过量。作为低氧诱导因子1α的稳定剂,去铁胺可有效上调低氧诱导因子1α及相关下游血管生成因子,加速血管形成。

背景:去铁胺具有调节干细胞、调节免疫、促进血管形成和成骨等多种功能,但它在地塞米松诱导的成骨细胞成骨抑制中的作用仍不清楚。
目的:探究去铁胺通过低氧诱导因子1α/血管内皮生长因子信号通路对地塞米松处理的成骨细胞的影响及其潜在的作用机制。
方法:采用CCK8法检测不同浓度去铁胺对MC3T3-E1细胞干预24,48,72 h的增殖效果,筛选出最佳干预浓度。实验设置对照组、地塞米松组、地塞米松+去铁胺10 μmol/L组、地塞米松+去铁胺 20 μmol/L组,采用CCK8和流式细胞术检测,评估去铁胺对地塞米松诱导的细胞增殖和凋亡的影响。通过碱性磷酸酶染色和活性测定评估MC3T3-E1细胞的碱性磷酸酶水平,茜素红染色用于比较矿化结节的形成,Western blot用于检测成骨和信号通路蛋白的表达。
结果与结论:①去铁胺在5-20 μmol/L范围内对MC3T3-E1细胞无明显毒性作用,且可改善地塞米松对MC3T3-E1细胞的增殖抑制和细胞凋亡作用;②与地塞米松组相比,去铁胺组可提高碱性磷酸酶活性和细胞矿化度,还能显著增加MC3T3-E1细胞中骨桥蛋白、Runt相关转录因子2和碱性磷酸酶的蛋白表达水平;③去铁胺还能激活地塞米松处理MC3T3-E1细胞的低氧诱导因子1α/血管内皮生长因子通路;④结果表明,去铁胺能够减轻地塞米松处理引起的成骨细胞凋亡,并通过激活低氧诱导因子1α/血管内皮生长因子信号通路来维护成骨细胞的活力,同时促进其增长,这可能有助于延缓激素引起股骨头坏死的发展。 
https://orcid.org/0009-0007-2679-8611(唐昊旭)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: MC3T3-E1细胞, 股骨头坏死, 成骨分化, 糖皮质激素, 低氧诱导因子1α, 血管内皮生长因子, 去铁胺

Abstract: BACKGROUND: Deferoxamine exhibits multiple functions such as stem cell modulation, immune regulation, and promotion of angiogenesis and osteogenesis, but its role in the osteoinhibition induced by dexamethasone in osteoblasts remains unclear.
OBJECTIVE: To investigate the effects of deferoxamine on osteoblasts treated with dexamethasone through the hypoxia-inducible factor 1α/vascular endothelial growth factor signaling pathway and to explore its potential mechanisms of action. 
METHODS: The proliferation of MC3T3-E1 cells treated with various concentrations of deferoxamine for 24, 48, and 72 hours was assessed using the cell counting kit-8 assay to determine the optimal intervention concentration. There were control, dexamethasone, dexamethasone plus deferoxamine 10 μmol/L, and dexamethasone plus deferoxamine 20 μmol/L groups in the experiment. Cell counting kit-8 assay and flow cytometry were employed to evaluate the effect of deferoxamine on dexamethasone-induced cell proliferation and apoptosis. Alkaline phosphatase staining and activity assays were conducted to assess alkaline phosphatase levels in MC3T3-E1 cells. Alizarin red staining was used to observe the formation of mineralized nodules. Western blot was employed to detect the expression of osteogenic and signaling proteins.
RESULTS AND CONCLUSION: (1) Deferoxamine showed no significant cytotoxicity to MC3T3-E1 cells within the range of 5-20 μmol/L and could ameliorate the inhibitory effects of dexamethasone on MC3T3-E1 cell proliferation and apoptosis. (2) Compared with the dexamethasone group, deferoxamine groups increased alkaline phosphatase activity and cell mineralization, and also significantly increased the protein expression of osteopontin, runt-related transcription factor 2, and alkaline phosphatase in MC3T3-E1 cells. (3) Deferoxamine also activated the hypoxia-inducible factor 1α/vascular endothelial growth factor pathway in dexamethasone-treated MC3T3-E1 cells. To conclude, deferoxamine can alleviate apoptosis in osteoblasts induced by dexamethasone treatment, maintain the vitality of osteoblasts by activating the hypoxia-inducible factor 1α/vascular endothelial growth factor signaling pathway, and promote their proliferation, which may help delay the progression of steroid-induced osteonecrosis of the femoral head. 

Key words: MC3T3-E1 cells, osteonecrosis of the femoral head, osteogenic differentiation, glucocorticoids, hypoxia-inducible factor 1α, vascular endothelial growth factor, deferoxamine

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