Puncturing of lyophilized tissue engineered vascular matrices enhances the efficiency of their recellularization

A.A. Ksiazek, L. Frese, P.E. Dijkman, B. Sanders, S.E. Motta, B. Weber, S.P. Hoerstrup

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Data on in vitro engineered “off the shelf” matrices support the concept of endogenous cellular repopulation driving the graft's remodeling via immune-mediated response. This seems important to further accelerate the cell reconstitution and may play a crucial role when mononuclear cells are used. Nevertheless, studies on decellularized xenogeneic grafts showed only limited host cell repopulation post-implantation. This study aims at a systematic comparison of reseeding methods (dripping, injection, bathing in a cell suspension and combined puncturing-dripping method) to define the most efficient technique enhancing recellularization of tissue engineered vascular matrices (patches, vessels, small diameter and standard size valves) prior implantation. The constructs were analyzed histologically, biochemically and biomechanically. Various preconditioning treatments (wet, lyophilized and air-dried) combined with reseeding methods demonstrated the highest cell loading efficiency, despite applied crimping and flow stress, of lyophilization followed by puncturing-dripping technique. This novel seeding method allows for an efficient, time-saving graft reseeding that can be used within a one-step cardiovascular clinical intervention. Statement of Significance: The concept of living tissue engineered, self-repairing, autologous cardiovascular replacements, was proposed alternatively to existing synthetic/xenogeneic prostheses. Recent studies in animal models demonstrate faster in vivo recellularization after grafts pre-seeding with cells prior implantation. Pre-seeded cells hold either, the ability to differentiate directionally or attract host cells, crucial for graft integration and remodeling. It is unclear, however, how efficient the pre-loading is and how well cells withstand the flow. The study presents a systematic overview of cell loading techniques of different cardiovascular constructs, tested under static and dynamic conditions. Comparison illustrates a significantly higher efficiency of cells loading in lyophilized tissues punctured before their standard seeding. This technique may beneficially accelerate remodeling of cardiovascular grafts in further in vivo studies.

Original languageEnglish
Pages (from-to)474-485
JournalActa Biomaterialia
Volume71
Early online date2 Mar 2018
DOIs
Publication statusPublished - 15 Apr 2018

Fingerprint

Piercing
Grafts
Blood Vessels
Tissue
Transplants
Prosthetics
Plastic flow
Suspensions
Animals
Freeze Drying
Air
Prostheses and Implants
Animal Models

Keywords

  • Cardiovascular grafts
  • Cell seeding techniques
  • Recellularization
  • Tissue-engineering
  • Trans-catheter delivery

Cite this

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title = "Puncturing of lyophilized tissue engineered vascular matrices enhances the efficiency of their recellularization",
abstract = "Data on in vitro engineered “off the shelf” matrices support the concept of endogenous cellular repopulation driving the graft's remodeling via immune-mediated response. This seems important to further accelerate the cell reconstitution and may play a crucial role when mononuclear cells are used. Nevertheless, studies on decellularized xenogeneic grafts showed only limited host cell repopulation post-implantation. This study aims at a systematic comparison of reseeding methods (dripping, injection, bathing in a cell suspension and combined puncturing-dripping method) to define the most efficient technique enhancing recellularization of tissue engineered vascular matrices (patches, vessels, small diameter and standard size valves) prior implantation. The constructs were analyzed histologically, biochemically and biomechanically. Various preconditioning treatments (wet, lyophilized and air-dried) combined with reseeding methods demonstrated the highest cell loading efficiency, despite applied crimping and flow stress, of lyophilization followed by puncturing-dripping technique. This novel seeding method allows for an efficient, time-saving graft reseeding that can be used within a one-step cardiovascular clinical intervention. Statement of Significance: The concept of living tissue engineered, self-repairing, autologous cardiovascular replacements, was proposed alternatively to existing synthetic/xenogeneic prostheses. Recent studies in animal models demonstrate faster in vivo recellularization after grafts pre-seeding with cells prior implantation. Pre-seeded cells hold either, the ability to differentiate directionally or attract host cells, crucial for graft integration and remodeling. It is unclear, however, how efficient the pre-loading is and how well cells withstand the flow. The study presents a systematic overview of cell loading techniques of different cardiovascular constructs, tested under static and dynamic conditions. Comparison illustrates a significantly higher efficiency of cells loading in lyophilized tissues punctured before their standard seeding. This technique may beneficially accelerate remodeling of cardiovascular grafts in further in vivo studies.",
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Puncturing of lyophilized tissue engineered vascular matrices enhances the efficiency of their recellularization. / Ksiazek, A.A.; Frese, L.; Dijkman, P.E.; Sanders, B.; Motta, S.E.; Weber, B.; Hoerstrup, S.P.

In: Acta Biomaterialia, Vol. 71, 15.04.2018, p. 474-485.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Ksiazek, A.A.

AU - Frese, L.

AU - Dijkman, P.E.

AU - Sanders, B.

AU - Motta, S.E.

AU - Weber, B.

AU - Hoerstrup, S.P.

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