Engineering of living autologous human umbilical cord cell-based septal occluder membranes using composite PGA-P4HB matrices.

Abstract:

:Interventional closure of intracardiac wall defects using occluder devices has evolved as a highly attractive treatment option. However, incomplete and delayed healing reactions often result in a major risk of residual defects, thromboembolism, or device fractures. Biodegradable living tissue engineered occluder membranes (TEOMs) could provide autologous thromboresistant implants with growth and remodeling capacities. PGA-P4HB composite matrices were seeded with human umbilical cord-derived cells or vascular-derived control cells and exposed to static (n = 19) or dynamic (n = 13) conditioning. Harvested TEOMs were integrated into occluder frameworks, exposed to crimping and delivered into pre-formed defects of juvenile porcine hearts. Dynamically conditioned TEOM constructs showed higher collagen formation in histology than static constructs with significantly higher stiffness moduli in uniaxial tensile testing. Grating interferometry revealed substantial but inhomogeneous cone-like degradation of the composite matrices in dynamic conditioning. The crimping and delivery procedures resulted in no significant changes in macroscopy, histo-morphology, cellular viability, DNA or hydroxyproline content, and scanning electron microscopy findings. Here, we present the in vitro fabrication, crimping and experimental delivery of living human umbilical cord-cell derived TEOMs based on composite matrices as a potential future autologous therapy of intracardiac wall defects.

journal_name

Biomaterials

journal_title

Biomaterials

authors

Weber B,Schoenauer R,Papadopulos F,Modregger P,Peter S,Stampanoni M,Mauri A,Mazza E,Gorelik J,Agarkova I,Frese L,Breymann C,Kretschmar O,Hoerstrup SP

doi

10.1016/j.biomaterials.2011.07.070

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

9630-41

issue

36

eissn

0142-9612

issn

1878-5905

pii

S0142-9612(11)00867-2

journal_volume

32

pub_type

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