In vitro analysis of an allogenic scaffold for tissue-engineered meniscus replacement.
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In vitro analysis of an allogenic scaffold for tissue-engineered meniscus replacement. / Maier, Dirk; Braeun, Klaus; Steinhauser, Erwin; Ueblacker, Peter; Oberst, Michael; Kreuz, Peter C; Roos, Nadine; Martinek, Vladimir; Imhoff, Andreas B.
in: J ORTHOP RES, Jahrgang 25, Nr. 12, 12, 2007, S. 1598-1608.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - In vitro analysis of an allogenic scaffold for tissue-engineered meniscus replacement.
AU - Maier, Dirk
AU - Braeun, Klaus
AU - Steinhauser, Erwin
AU - Ueblacker, Peter
AU - Oberst, Michael
AU - Kreuz, Peter C
AU - Roos, Nadine
AU - Martinek, Vladimir
AU - Imhoff, Andreas B
PY - 2007
Y1 - 2007
N2 - Scaffolds play a key role in the field of tissue engineering. Particularly for meniscus replacement, optimal scaffold properties are critical. The aim of our study was to develop a novel scaffold for replacement of meniscal tissue by means of tissue engineering. Emphasis was put on biomechanical properties comparable to native meniscus, nonimmunogenecity, and the possibility of seeding cells into and cultivating them within the scaffold (nontoxicity). For this purpose, native ovine menisci were treated in vitro in a self-developed enzymatic process. Complete cell removal was achieved and shown both histologically and electron microscopically (n = 15). Immunohistochemical reaction (MHC 1/MHC 2) was positive for native ovine meniscus and negative for the scaffold. Compared to native meniscus (25.8 N/mm) stiffness of the scaffold was significantly increased (30.2 N/mm, p <0.05, n = 10). We determined the compression (%) of the native meniscus and the scaffold under a load of 7 N. The compression was 23% for native meniscus and 29% for the scaffold (p <0.05, n = 10). Residual force of the scaffold was significantly lower (5.2 N vs. 4.9 N, p <0.05, n = 10). Autologous fibrochondrocytes were needle injected and successfully cultivated within the scaffolds over a period of 4 weeks (n = 10). To our knowledge, this study is the first to remove cells and immunogenetic proteins (MHC 1/MHC 2) completely out of native meniscus and preserve important biomechanical properties. Also, injected cells could be successfully cultivated within the scaffold. Further in vitro and in vivo animal studies are necessary to establish optimal cell sources, sterilization, and seeding techniques. Cell differentiation, matrix production, in vivo remodeling of the construct, and possible immunological reactions after implantation are subject of further studies.
AB - Scaffolds play a key role in the field of tissue engineering. Particularly for meniscus replacement, optimal scaffold properties are critical. The aim of our study was to develop a novel scaffold for replacement of meniscal tissue by means of tissue engineering. Emphasis was put on biomechanical properties comparable to native meniscus, nonimmunogenecity, and the possibility of seeding cells into and cultivating them within the scaffold (nontoxicity). For this purpose, native ovine menisci were treated in vitro in a self-developed enzymatic process. Complete cell removal was achieved and shown both histologically and electron microscopically (n = 15). Immunohistochemical reaction (MHC 1/MHC 2) was positive for native ovine meniscus and negative for the scaffold. Compared to native meniscus (25.8 N/mm) stiffness of the scaffold was significantly increased (30.2 N/mm, p <0.05, n = 10). We determined the compression (%) of the native meniscus and the scaffold under a load of 7 N. The compression was 23% for native meniscus and 29% for the scaffold (p <0.05, n = 10). Residual force of the scaffold was significantly lower (5.2 N vs. 4.9 N, p <0.05, n = 10). Autologous fibrochondrocytes were needle injected and successfully cultivated within the scaffolds over a period of 4 weeks (n = 10). To our knowledge, this study is the first to remove cells and immunogenetic proteins (MHC 1/MHC 2) completely out of native meniscus and preserve important biomechanical properties. Also, injected cells could be successfully cultivated within the scaffold. Further in vitro and in vivo animal studies are necessary to establish optimal cell sources, sterilization, and seeding techniques. Cell differentiation, matrix production, in vivo remodeling of the construct, and possible immunological reactions after implantation are subject of further studies.
M3 - SCORING: Zeitschriftenaufsatz
VL - 25
SP - 1598
EP - 1608
JO - J ORTHOP RES
JF - J ORTHOP RES
SN - 0736-0266
IS - 12
M1 - 12
ER -