Amelioration of ligamentum flavum hypertrophy using umbilical cord mesenchymal stromal cell-derived extracellular vesicles

Bioactive Materials

Yong-Xin Ren¹  Yong-Can Huang²  Zhi Li³  Yi-Fan Wei⁴  Cheng Ma⁴  He-Long Zhang⁴  He Li⁴  Feng-Lei Yu⁴  Xin Qi⁵  Ya-Nan Pu⁶ 

[1] Corresponding author. Outpatient &Emergency Management Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China;Department of Orthopaedics, Geriatric Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210024, China;Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, China;Department of Pathogen Biology and Immunology, Nanjing Medical University, Nanjing, Jiangsu, 210029, China;;Outpatient &

关键词: Ligamentum flavum hypertrophy;    Fibrosis;    Umbilical cord mesenchymal stromal cells;    Extracellular vesicle;    miR-146a-5p;    miR-221-3p;   

DOI  :  

来源: DOAJ

【 摘 要 】

Ligamentum flavum (LF) hypertrophy (LFH) has been recognised as one of the key contributors to lumbar spinal stenosis. Currently, no effective methods are available to ameliorate this hypertrophy. In this study, human umbilical cord mesenchymal stromal cell-derived extracellular vesicles (hUCMSC-EVs) were introduced for the first time as promising vehicles for drug delivery to treat LFH. The downregulation of miR-146a-5p and miR-221-3p expressions in human LF tissues negatively correlated with increased LF thickness. The hUCMSC-EVs enriched with these two miRNAs significantly suppressed LFH in vivo and notably ameliorated the progression of transforming growth factor β1(TGF-β1)-induced fibrosis in vitro after delivering these two miRNAs to mouse LF cells. The results further demonstrated that miR-146a-5p and miR-221-3p directly bonded to the 3′-UTR regions of SMAD4 mRNA, thereby inhibiting the TGF-β/SMAD4 signalling pathway. Therefore, this translational study determined the effectiveness of a hUCMSC-EVs-based approach for the treatment of LFH and revealed the critical target of miR-146a-5p and miR-221-3p. Our findings provide new insights into promising therapeutics using a hUCMSC-EVs-based delivery system for patients with lumbar spinal stenosis.

【 授权许可】

Unknown