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. 2022 Jan 27;8(2):379–405. doi: 10.1021/acsbiomaterials.1c01145

Table 3. Hydrogel Fiber-Based Methods for the Biofabrication of Skeletal Muscle Tissue Interfaces.

skeletal muscle interface fiber-based biofabrication technique cell types in vitro/in vivo main outcomes ref
vessel/muscle interface cell/hybrid electrospinning C2C12/HUVECs enhancement of MHC and sarcomeric α-actin expression for HUVEC-C2C12 construct compared to those containing only muscle cells (205)
vessel/muscle interface microfluidic spinning C2C12/HUVECs fabrication of biomimetic structure formed by convoluted capillaries around a muscle bundle (206)
high viability (>90%) of both C2C12 and HUVECs
neuromuscular junction (NMJ) hybrid 3D bioprinting hMPCs/hNSCs integration of hNSCs improved skeletal muscle restoration upon in vivo implantation in TA rat defect (144)
differentiation of hNSCs into neurons and glial cells
in vivo innervation following NMJ formation
myotendinous junction (MTJ) hybrid 3D bioprinting C2C12/NIH 3T3 recapitulation of MTJ mechanical and biological heterogeneous complexity (143)
myotubes formation and deposition of collagen type I at the muscle and tendon side, respectively
cell-organization pattern at the interface region
increase of focal adhesion markers responsible for upregulating MTJ compared to only muscle-side
connective tissue/muscle interface microfluidic-assisted 3D bioprinting C2C12/BALB 3T3 fine compartmentalization of C2C12 myoblasts and BALB/3T3 fibroblasts in a Janus fiber configuration (7)
formation of myotubes exclusively in the compartmentalized region after 5 days of culture