Bacterial nanocellulose as a new patch material for closure of ventricular septal defects in a pig model
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Bacterial nanocellulose as a new patch material for closure of ventricular septal defects in a pig model. / Lang, Nora; Merkel, Elena; Fuchs, Franziska; Schumann, Dieter; Klemm, Dieter; Kramer, Friederike; Mayer-Wagner, Susanne; Schroeder, Christian; Freudenthal, Franz; Netz, Heinrich; Kozlik-Feldmann, Rainer; Sigler, Matthias.
In: EUR J CARDIO-THORAC, Vol. 47, No. 6, 2015, p. 1013-1021.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Bacterial nanocellulose as a new patch material for closure of ventricular septal defects in a pig model
AU - Lang, Nora
AU - Merkel, Elena
AU - Fuchs, Franziska
AU - Schumann, Dieter
AU - Klemm, Dieter
AU - Kramer, Friederike
AU - Mayer-Wagner, Susanne
AU - Schroeder, Christian
AU - Freudenthal, Franz
AU - Netz, Heinrich
AU - Kozlik-Feldmann, Rainer
AU - Sigler, Matthias
N1 - © The Author 2014. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.
PY - 2015
Y1 - 2015
N2 - OBJECTIVES: Current materials for closure of cardiac defects such as ventricular septal defects (VSDs) are associated with compliance mismatch and a chronic inflammatory response. Bacterial nanocellulose (BNC) is a non-degradable biomaterial with promising properties such as high mechanical strength, favourable elasticity and a negligible inflammatory reaction. The aim of this study was the evaluation of a BNC patch for VSD closure and the investigation of its in vivo biocompatibility in a chronic pig model.METHODS: Young's modulus and tensile strength of BNC patches were determined before and after blood exposure. Muscular VSDs were created and closed with a BNC patch on the beating heart in an in vivo pig model. Hearts were explanted after 7, 30 or 90 days. Macropathology, histology and immunohistochemistry were performed.RESULTS: Young's modulus and tensile strength of the BNC patch decreased after blood contact from 6.3 ± 1.9 to 3.86 ± 2.2 MPa (P < 0.01) and 0.33 ± 0.06 to 0.26 ± 0.06 MPa (P < 0.01), respectively, indicating the development of higher elasticity. Muscular VSDs were closed with a BNC patch without residual shunting. After 90 days, a mild chronic inflammatory reaction was present. Moreover, there was reduced tissue overgrowth in comparison with polyester. Proceeding cellular organization characterized by fibromuscular cells, production of extracellular matrix, neoangiogenesis and complete neoendothelialization were found. There were no signs of thrombogenicity.CONCLUSIONS: BNC patches can close VSDs with good mid-term results and its biocompatibility can be considered as satisfactory. Its elasticity increases in the presence of blood, which might be advantageous. Therefore, it has potential to be used as an alternative patch material in congenital heart disease.
AB - OBJECTIVES: Current materials for closure of cardiac defects such as ventricular septal defects (VSDs) are associated with compliance mismatch and a chronic inflammatory response. Bacterial nanocellulose (BNC) is a non-degradable biomaterial with promising properties such as high mechanical strength, favourable elasticity and a negligible inflammatory reaction. The aim of this study was the evaluation of a BNC patch for VSD closure and the investigation of its in vivo biocompatibility in a chronic pig model.METHODS: Young's modulus and tensile strength of BNC patches were determined before and after blood exposure. Muscular VSDs were created and closed with a BNC patch on the beating heart in an in vivo pig model. Hearts were explanted after 7, 30 or 90 days. Macropathology, histology and immunohistochemistry were performed.RESULTS: Young's modulus and tensile strength of the BNC patch decreased after blood contact from 6.3 ± 1.9 to 3.86 ± 2.2 MPa (P < 0.01) and 0.33 ± 0.06 to 0.26 ± 0.06 MPa (P < 0.01), respectively, indicating the development of higher elasticity. Muscular VSDs were closed with a BNC patch without residual shunting. After 90 days, a mild chronic inflammatory reaction was present. Moreover, there was reduced tissue overgrowth in comparison with polyester. Proceeding cellular organization characterized by fibromuscular cells, production of extracellular matrix, neoangiogenesis and complete neoendothelialization were found. There were no signs of thrombogenicity.CONCLUSIONS: BNC patches can close VSDs with good mid-term results and its biocompatibility can be considered as satisfactory. Its elasticity increases in the presence of blood, which might be advantageous. Therefore, it has potential to be used as an alternative patch material in congenital heart disease.
U2 - 10.1093/ejcts/ezu292
DO - 10.1093/ejcts/ezu292
M3 - SCORING: Journal article
C2 - 25064053
VL - 47
SP - 1013
EP - 1021
JO - EUR J CARDIO-THORAC
JF - EUR J CARDIO-THORAC
SN - 1010-7940
IS - 6
ER -