当前位置:首页>深圳>ACS Nano|深圳大学总医院|张杨|间充质干细胞来源的细胞外囊泡通过let-7a-5p/整合素 β3 轴抑制破骨细胞活性改善颞下颌关节骨关节炎

ACS Nano|深圳大学总医院|张杨|间充质干细胞来源的细胞外囊泡通过let-7a-5p/整合素 β3 轴抑制破骨细胞活性改善颞下颌关节骨关节炎

  • 2026-03-31 18:57:26
ACS Nano|深圳大学总医院|张杨|间充质干细胞来源的细胞外囊泡通过let-7a-5p/整合素 β3 轴抑制破骨细胞活性改善颞下颌关节骨关节炎
文章框架:1.文献信息;2.文献摘要;3.研究内容
1.文献信息

【题目】Mesenchymal Stem Cell-Derived Extracellular Vesicles Ameliorate Temporomandibular Joint Osteoarthritis by Suppressing Osteoclast Activity Via let-7a-5p/Integrin β3 Axis

【期刊】ACS Nano

【影响因子】16.1

【关键词】颞下颌关节骨关节炎;软骨下骨;间充质干细胞;细胞外囊泡;破骨细胞;miRNA

2.文献摘要

颞下颌关节骨关节炎(TMJOA)是一种常见的退行性口腔疾病,也是临床上最具挑战性的关节疾病之一。其特征为早期过度的软骨下骨丢失及后期软骨损伤。近年来,间充质干细胞(MSC)来源的细胞外囊泡(MSC-EVs)因其在调控OA病理中的潜在作用而受到广泛关注。然而,MSC-EVs在 TMJOA 中的应用仍待探索,其治疗机制尚未完全阐明。本研究通过miRNA测序,评估了人脐带间充质干细胞来源的细胞外囊泡(hUCMSC-EVs)对 TMJOA(以软骨下骨为重点)的治疗效果,并探究其分子机制。结果表明,hUCMSC-EVs治疗通过转移let-7a-5p显著降低破骨细胞(OC)活性,进而抑制破骨细胞整合素 β3(ITGβ3)的表达。在大鼠 TMJOA 模型中,关节腔内注射hUCMSC-EVs主要通过抑制破骨细胞活性,对软骨下骨和软骨均表现出保护作用。这些结果表明,基于hUCMSC-EVs的疗法作为治疗 TMJOA 的潜在有效方法具有重要价值。

3.研究内容

颞下颌关节骨关节炎(TMJOA)是最常见且复杂的口腔退行性疾病之一,其特征为髁突软骨进行性退变、软骨下骨破坏及慢性疼痛,显著损害患者生活质量。流行病学数据显示,全球 TMJOA 患病率介于2%至16%之间,相当于数亿需长期管理的患者。患病率随年龄增长而上升,20-49岁人群约25%受累,73-75岁人群近70%患病。尽管负担沉重,但由于颞下颌关节解剖结构复杂及手术干预风险,治疗选择仍有限。常规疗法(包括物理治疗、咬合夹板、非甾体抗炎药(NSAIDs)以及关节腔内润滑或皮质类固醇注射)适用于超过80%的颞下颌关节紊乱患者。虽然这些方法可缓解症状并适度延缓疾病进展,但其主要针对临床表现,而非直接阻止组织退变或促进再生。

细胞外囊泡(EVs)是由细胞分泌至细胞外空间的脂质结合颗粒。它们携带多种物质,包括蛋白质、酶、脂质和核酸(如miRNA和mRNA),这些物质可从母细胞传递至受体细胞以介导细胞间通讯。与间充质干细胞(MSCs)相比,EVs具有多项优势,包括良好的安全性、低免疫原性、高稳定性和便于储存。值得注意的是,源自人脐带间充质干细胞(hUCMSCs)的EVs表现出更一致的表型特征,且相较于其他组织来源的MSCs可能具有更优的治疗效果。这种增强的疗效归因于其高表达与抗衰老、抗炎、细胞增殖及细胞外基质形成相关的miRNA和蛋白质。然而,尽管这些发现前景可观,但其在 TMJOA 中的应用仍需深入探索,尤其是其潜在作用机制方面。

本研究评估了人脐带间充质干细胞外泌体(hUCMSC-EVs)在体外对破骨细胞分化的影响,以及在大鼠 TMJOA 模型中对软骨下骨吸收和髁突软骨修复的作用。此外,通过microRNA(miRNA)谱分析和干扰实验,探究了hUCMSC-EVs抑制破骨细胞分化的潜在机制。综上,本研究阐明了hUCMSC-EVs在 TMJOA 中的治疗潜力,特别是其在破骨细胞调控和软骨下骨稳态中的作用。

图1. hUCMSC-EVs对破骨细胞分化的抑制作用

图2. hUCMSC-EVs缓解 TMJOA 软骨下骨退化

图3. hUCMSC-EVs处理的 TMJOA 组织学评估。
图4. 外泌体miRNA let-7a-5p抑制破骨细胞分化
图5. 外泌体let-7a-5p通过靶向整合素β3抑制破骨细胞分化

颞下颌关节骨关节炎(TMJOA)是一种致残性退行性疾病,其早期主要特征为软骨下骨过度流失,导致疼痛和颌关节功能受限,但目前尚无有效治疗策略可阻止疾病进展。本研究通过靶向软骨下骨,创新性地改善 TMJOA ,并探索外泌体(EVs)调节破骨细胞活性的潜力,从而延缓疾病进展。结果显示,人脐带间充质干细胞来源的外泌体(hUCMSC-EVs)通过递送let-7a-5p,有效抑制破骨细胞分化,靶向 ITGβ3 软骨下骨流失,进而促进软骨基质稳态。这些发现表明,hUCMSC-EVs可能为 TMJOA 的早期干预提供一种具有前景的治疗策略。

本研究证实,人脐带间充质干细胞外泌体(hUCMSC-EVs)通过调控软骨下骨重塑及保护软骨完整性,在 TMJOA 中发挥显著治疗作用。其作用机制为:hUCMSC-EVs向破骨细胞递送let-7a-5p,导致 ITGβ3 表达下调并抑制破骨细胞活性。在大鼠 TMJOA 模型中,关节腔内注射hUCMSC-EVs可有效缓解软骨下骨丢失和软骨退变,凸显其作为无细胞治疗策略的潜力。尽管其在临床治疗 TMJOA 中的应用价值仍有待探索,但这些发现为间充质干细胞外泌体调控破骨细胞介导的骨吸收的分子机制提供了重要见解,并将hUCMSC-EVs确立为 TMJOA 治疗的潜在候选方案。

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  1. CONNECT:[ UseTime:0.000505s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000848s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000317s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000307s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000700s ]
  6. SELECT * FROM `set` [ RunTime:0.000224s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000683s ]
  8. SELECT * FROM `article` WHERE `id` = 519564 LIMIT 1 [ RunTime:0.004346s ]
  9. UPDATE `article` SET `lasttime` = 1777952211 WHERE `id` = 519564 [ RunTime:0.001172s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000243s ]
  11. SELECT * FROM `article` WHERE `id` < 519564 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000384s ]
  12. SELECT * FROM `article` WHERE `id` > 519564 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000756s ]
  13. SELECT * FROM `article` WHERE `id` < 519564 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001355s ]
  14. SELECT * FROM `article` WHERE `id` < 519564 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001718s ]
  15. SELECT * FROM `article` WHERE `id` < 519564 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004194s ]
0.086274s