时间标签：数据日期 2026-10-31 · 生成时间 2026-11-01 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/10/28–2026/10/31 ｜ 情报发生日期 2026-10-31
研究问题
In advanced cases, total joint replacement remains the only definitive solution, underscoring the urgent need for disease-modifying interventions [].；In OA, however, chondrocytes become increasingly reliant on glycolysis, generating less OXPHOS-derived ATP and accumulating excessive reactive oxygen species (ROS) [, ].；Motivated by the critical role of mitochondrial dysfunction in OA, we hypothesized that introducing healthy platelet mitochondria into osteoarthritic chondrocytes would restore OXPHOS capacity, curtail excessive ROS, and protect cartilage integrity.
方法
All procedures involving human donors were approved by the Bioethics Committee of the University of the Andes (Protocol cec2021031) and by the Institutional Review Board of Hospital Clínico de la Universidad de Chile (HCUCH) (Approval Certificate No. 12), in accordance with the Declaration of Helsinki.；The human chondrocyte isolation protocol was followed as described [].；Briefly, cartilage fragments were minced into small pieces (~ 1 mm³) and subjected to sequential digestion with pronase (Merck®, Cat. #P5147) for 1 h at 37 °C, followed by collagenase II (Sigma-Aldrich®, Cat. #C6885) for 16 h at 37 °C under constant agitation.；Next, 800 µL of Reagent C was added, followed by centrifugation at 700 × g for 10 min at 4 °C.
核心结论
L, M) differed significantly between groups, indicating that OA does not overtly impair the respiratory competence of platelet mitochondria and supporting the feasibility of an eventual autologous application.；Collectively, these results demonstrate that the platelet-derived mitochondrial fraction retains its structural integrity and functional respiratory capacity prior to transfer, with no detectable differences between mitochondria isolated from HD and OA patients.；Incorporation was negligible at 1:5 (1.59%) and 1:10 (13.3%), increased substantially at 1:25 (73.0%) and 1:50 (94.4%), and reached near-maximal levels at 1:100 (98.5%). ‖ 结论：Future work defining the determinants of mitochondrial uptake, persistence, and functional integration within the joint environment, together with the preparation and dosing parameters required to sustain phenotypic rescue, will be key to consolidating this approach as a viable disease-modifying intervention for osteoarthritis.
局限
This point is non-trivial, relying exclusively on membrane potential-sensitive dyes such as MitoTracker can be confounded by dye leakage or non-specific cytoplasmic accumulation [, ].；Nevertheless, given the temporal dynamics and complex regulation of MMPs during osteoarthritis progression, further studies are needed to elucidate the mechanisms underlying their differential regulation following mitochondrial transfer.；The concomitant decrease in OPN is a notable finding that warrants further mechanistic investigation.
对本项目的价值
★☆☆☆☆ 线粒体端点既是机制解释层，也是最容易拿到体外 / 影像读数的中间层。
全文来源
PMC JATS 全文（正文 49,336 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：Platelet-derived mitochondrial transplantation expands respiratory reserve and extracellular matrix anabolism in primary osteoarthritic chondrocytes.
- 期刊与标识：J Transl Med · PMID 42958393 · DOI 10.1186/s12967-026-08809-4
A 级证据分级：A 级（同行评议人体研究）
本文属人体研究证据，但需注意：观察性或小样本干预的结论不等于已证实临床获益；效应量与长期安全性仍需更大规模、更长随访的试验验证。
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