Extracellular Matrix Microspheres with Magnetically Labeled MSCs enable Functional Regeneration of the Osteo-Tendinous Junction.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

The osteotendinous junction, or enthesis, is a mechanically graded transitional zone critical for load transfer between soft and hard tissues. Its regeneration following injury remains a major clinical challenge due to poor integration of current grafts, uncontrolled alignment of cells, and the lack of spatiotemporal control over cell fate. To address this, we engineered a magneto-responsive, biomimetic system that synergistically combines adipose-derived mesenchymal stem cells (AdMSCs), tendon-derived extracellular matrix (tECM) microspheres, and iron-doped nano magnetized hydroxyapatite (nMHAp) nanoparticles. The nMHAp particles were synthesized via an accelerated biomineralization route, yielding superparamagnetic, osteoinductive particles suitable for intracellular uptake and magnetic manipulation. The tECM microspheres provided a natural tenogenic niche, supporting spatial compartmentalization within a single construct. Upon exposure to a static magnetic field, nMHAp-labeled AdMSCs encapsulated within tECM microspheres exhibited enhanced osteogenic commitment, characterized by a ∼2-fold upregulation of RUNX2 expression and a ∼2-fold increase in mineral deposition compared to nonstimulated controls. Additionally, cells displayed pronounced cytoskeletal alignment under magnetic stimulation. In contrast, in the absence of magnetic cues, the tECM microenvironment preserved ten

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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