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Falguni Pati
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조회 19  인쇄하기 주소복사 트위터 공유 페이스북 공유 
라이카코리아는 BRIC 후원기관입니다.
Bioprintable, cell-laden silk fibroin–gelatin hydrogel supporting multilineage differentiation of stem cells for fabrication of three-dimensional tissue constructs
열기 Authors and Affiliations

Abstract
Bioprinting has exciting prospects for printing three-dimensional (3-D) tissue constructs by delivering living cells with appropriate matrix materials. However, progress in this field is currently extremely slow due to limited choices of bioink for cell encapsulation and cytocompatible gelation mechanisms. Here we report the development of clinically relevant sized tissue analogs by 3-D bioprinting, delivering human nasal inferior turbinate tissue-derived mesenchymal progenitor cells encapsulated in silk fibroin?gelatin (SF?G) bioink. Gelation in this bioink was induced via in situ cytocompatible gelation mechanisms, namely enzymatic crosslinking by mushroom tyrosinase and physical crosslinking via sonication. Mechanistically, tyrosinases oxidize the accessible tyrosine residues of silk and/or gelatin into reactive o-quinone moieties that can either condense with each other or undergo nonenzymatic reactions with available amines of both silk and gelatin. Sonication alters the hydrophobic interaction and accelerates self-assembly of silk fibroin macromolecules to form β-sheet crystals, which physically crosslink the hydrogel. However, sonication has no effect on the conformation of gelatin. The effect of optimized rheology, secondary conformations of silk-gelatin bioink, temporally controllable gelation strategies and printing parameters were assessed to achieve maximum cell viability and multilineage differentiation of the encapsulated human nasal inferior turbinate tissue-derived mesenchymal progenitor cells. This strategy offers a unique path forward in the direction of direct printing of spatially customized anatomical architecture in a patient-specific manner.

Keywords : Bioprinting, Silk-gelatin bioink, Cytocompatible gelation, Self-standing 3-D construct, Multilineage differentiation
논문정보
- 형식: Research article
- 게재일: 2015년 01월 (BRIC 등록일 2017-09-11)
- 연구진: 국내(교신)+국외 연구진태극기
- 피인용횟수: 최근 3년간 60회 이상 인용된 논문
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Sanskrita Das (POSTECH, Indian In...)
장진아 (POSTECH)
조동우 (POSTECH)
최영진 (POSTECH)
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