TY - JOUR
T1 - 4‐Axis 3D‐Printed Tubular Biomaterials Imitating the Anisotropic Nanofiber Orientation of Porcine Aortae
AU - Lackner, Florian
AU - Šurina, Paola
AU - Fink, Julia
AU - Kotzbeck, Petra
AU - Kolb, Dagmar
AU - Stana, Jan
AU - Grab, Maximilian
AU - Hagl, Christian
AU - Tsilimparis, Nikolaos
AU - Mohan, Tamilselvan
AU - Kleinschek, Karin Stana
AU - Kargl, Rupert
PY - 2024/1/15
Y1 - 2024/1/15
N2 - Many of the peculiar properties of the vasculature are related to the arrangement of anisotropic proteinaceous fibers in vessel walls. Understanding and imitating these arrangements can potentially lead to new therapies for cardiovascular diseases. These can be pre‐surgical planning, for which patient‐specific ex vivo anatomical models for endograft testing are of interest. Alternatively, therapies can be based on tissue engineering, for which degradable in vitro cell growth substrates are used to culture replacement parts. In both cases, materials are desirable that imitate the biophysical properties of vessels, including their tubular shapes and compliance. This work contributes to these demands by offering methods for the manufacturing of anisotropic 3D‐printed nanofibrous tubular structures that have similar biophysical properties as porcine aortae, that are biocompatible, and that allow for controlled nutrient diffusion. Tubes of various sizes with axial, radial, or alternating nanofiber orientation along the blood flow direction are manufactured by a customized method. Blood pressure‐resistant, compliant, stable, and cell culture‐compatible structures are obtained, that can be degraded in vitro on demand. It is suggested that these healthcare materials can contribute to the next generation of cardiovascular therapies of ex vivo pre‐surgical planning or in vitro cell culture.
AB - Many of the peculiar properties of the vasculature are related to the arrangement of anisotropic proteinaceous fibers in vessel walls. Understanding and imitating these arrangements can potentially lead to new therapies for cardiovascular diseases. These can be pre‐surgical planning, for which patient‐specific ex vivo anatomical models for endograft testing are of interest. Alternatively, therapies can be based on tissue engineering, for which degradable in vitro cell growth substrates are used to culture replacement parts. In both cases, materials are desirable that imitate the biophysical properties of vessels, including their tubular shapes and compliance. This work contributes to these demands by offering methods for the manufacturing of anisotropic 3D‐printed nanofibrous tubular structures that have similar biophysical properties as porcine aortae, that are biocompatible, and that allow for controlled nutrient diffusion. Tubes of various sizes with axial, radial, or alternating nanofiber orientation along the blood flow direction are manufactured by a customized method. Blood pressure‐resistant, compliant, stable, and cell culture‐compatible structures are obtained, that can be degraded in vitro on demand. It is suggested that these healthcare materials can contribute to the next generation of cardiovascular therapies of ex vivo pre‐surgical planning or in vitro cell culture.
KW - anisotropy
KW - aortae
KW - biomaterials
KW - bioprinting
KW - nanofibers
UR - http://www.scopus.com/inward/record.url?scp=85174808863&partnerID=8YFLogxK
U2 - 10.1002/adhm.202302348
DO - 10.1002/adhm.202302348
M3 - Article
SN - 2192-2640
VL - 13
JO - Advanced Healthcare Materials
JF - Advanced Healthcare Materials
IS - 2
M1 - 2302348
ER -