Exosomes secreted by hypoxia-stimulated bone-marrow mesenchymal stem cells promote grafted tendon-bone tunnel healing in rat anterior cruciate ligament reconstruction model.

Background: After anterior cruciate ligament (ACL) reconstruction in clinic, firm and rapid integration of the grafted tendon into the bone tunnel remains a challenge. Exosomes from hypoxia-treated stem cells are beneficial for promoting angiogenesis and then coupling with osteogenesis. Therefore, exosomes from hypoxia-cultured bone-marrow mesenchymal stem cells (Hypo-Exos) may be a cell-free therapy for enhancing graft-bone incorporation after ACL reconstruction.

Constructing Injectable Bone-Forming Units by Loading a Subtype of Osteoprogenitors on Decellularized Bone Matrix Powders for Bone Regeneration.

Bone defects resulting from trauma or tumor are one of the most challenging problems in clinical settings. Current tissue engineering (TE) strategies for managing bone defects are insufficient, owing to without using optimal osteoconductive material and seeding cells capable of superior osteogenic potential; thus their efficacy is instable. Herein, a novel TE strategy was developed for treating bone defects.