TY - JOUR
T1 - Engineering an enthesis-like graft for rotator cuff repair
T2 - An approach to fabricate highly biomimetic scaffold capable of zone-specifically releasing stem cell differentiation inducers
AU - Chen, Can
AU - Shi, Qiang
AU - Li, Muzhi
AU - Chen, Yang
AU - Zhang, Tao
AU - Xu, Yan
AU - Liao, Yunjie
AU - Ding, Shulin
AU - Wang, Zhanwen
AU - Li, Xing
AU - Zhao, Chunfeng
AU - Sun, Lunquan
AU - Hu, Jianzhong
AU - Lu, Hongbin
N1 - Publisher Copyright:
© 2021 The Authors
PY - 2022/10
Y1 - 2022/10
N2 - Rotator cuff (RC) attaches to humerus across a triphasic yet continuous tissue zones (bone-fibrocartilage-tendon), termed “enthesis”. Regrettably, rapid and functional enthesis regeneration is challenging after RC tear. The existing grafts bioengineered for RC repair are insufficient, as they were engineered by a scaffold that did not mimic normal enthesis in morphology, composition, and tensile property, meanwhile cannot simultaneously stimulate the formation of bone-fibrocartilage-tendon tissues. Herein, an optimized decellularization approach based on a vacuum aspiration device (VAD) was developed to fabricate a book-shaped decellularized enthesis matrix (O-BDEM). Then, three recombinant growth factors (CBP-GFs) capable of binding collagen were synthesized by fusing a collagen-binding peptide (CBP) into the N-terminal of BMP-2, TGF-β3, or GDF-7, and zone-specifically tethered to the collagen of O-BDEM to fabricate a novel scaffold (CBP-GFs/O-BDEM) satisfying the above-mentioned requirements. After ensuring the low immunogenicity of CBP-GFs/O-BDEM by a novel single-cell mass cytometry in a mouse model, we interleaved urine-derived stem cell-sheets into this CBP-GFs/O-BDEM to bioengineer an enthesis-like graft. Its high-performance on regenerating enthesis was determined in a canine model. These findings indicate this CBP-GFs/O-BDEM may be an excellent scaffold for constructing enthesis-like graft to patch large/massive RC tears, and provide breakthroughs in fabricating graded interfacial tissue.
AB - Rotator cuff (RC) attaches to humerus across a triphasic yet continuous tissue zones (bone-fibrocartilage-tendon), termed “enthesis”. Regrettably, rapid and functional enthesis regeneration is challenging after RC tear. The existing grafts bioengineered for RC repair are insufficient, as they were engineered by a scaffold that did not mimic normal enthesis in morphology, composition, and tensile property, meanwhile cannot simultaneously stimulate the formation of bone-fibrocartilage-tendon tissues. Herein, an optimized decellularization approach based on a vacuum aspiration device (VAD) was developed to fabricate a book-shaped decellularized enthesis matrix (O-BDEM). Then, three recombinant growth factors (CBP-GFs) capable of binding collagen were synthesized by fusing a collagen-binding peptide (CBP) into the N-terminal of BMP-2, TGF-β3, or GDF-7, and zone-specifically tethered to the collagen of O-BDEM to fabricate a novel scaffold (CBP-GFs/O-BDEM) satisfying the above-mentioned requirements. After ensuring the low immunogenicity of CBP-GFs/O-BDEM by a novel single-cell mass cytometry in a mouse model, we interleaved urine-derived stem cell-sheets into this CBP-GFs/O-BDEM to bioengineer an enthesis-like graft. Its high-performance on regenerating enthesis was determined in a canine model. These findings indicate this CBP-GFs/O-BDEM may be an excellent scaffold for constructing enthesis-like graft to patch large/massive RC tears, and provide breakthroughs in fabricating graded interfacial tissue.
KW - Acellular matrix
KW - Collagen-binding peptide
KW - Enthesis regeneration
KW - Rotator cuff
KW - Stem cell differentiation inducer
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U2 - 10.1016/j.bioactmat.2021.12.021
DO - 10.1016/j.bioactmat.2021.12.021
M3 - Article
AN - SCOPUS:85123896864
SN - 2452-199X
VL - 16
SP - 451
EP - 471
JO - Bioactive Materials
JF - Bioactive Materials
ER -