Cited by 66Tissue Engineering and Regenerative MedicineXenotransplantation and immune responseCollagen: Extraction and Characterization

Stepwise solubilization-based antigen removal for xenogeneic scaffold generation in tissue engineering

Wong, Maelene L., Wong, Janelle L., Athanasiou, Kyriacos A., Griffiths, Leigh G.·2013·Acta Biomaterialia

Abstract

The ability of residual antigens on decellularized tissue to elicit the immune response upon implantation motivates development of a more rigorous antigen removal (AR) process for xenogeneic scaffold generation. Antigen removal strategies promoting solubilization of hydrophilic proteins (predominantly cytoplasmic) enhance the reduction of hydrophilic antigenicity in bovine pericardium (BP); however, the diversity of protein antigens within a tissue necessitates development of AR strategies capable of addressing a spectrum of protein antigen solubilities. In the present study, methods for promoting solubilization of lipophilic proteins (predominantly membrane) were investigated for their ability to reduce lipophilic antigenicity of BP when applied as a second AR step following our previously described hydrophilic AR method. Bovine pericardium following AR (BP-AR) was assessed for residual hydrophilic and lipophilic antigenicity, removal of known lipophilic xenoantigens, tensile properties, and extracellular matrix structure and composition. Facilitating hydrophile solubilization (using dithiothreitol and potassium chloride) followed by lipophile solubilization (using amidosulfobetaine-14 (ASB-14)), in a two-step sequential, differential AR strategy, significantly reduces residual hydrophilic and lipophilic antigenicity of BP-AR beyond that achieved with either one-step hydrophilic AR or decellularization using 1% (w/v) sodium dodecyl sulfate. Moreover, use of 1% (w/v) ASB-14 for lipophilic AR eliminates the two most critical known barriers to xenotransplantation (galactose-α(1,3)-galactose and major histocompatibility complex I)) from BP-AR without compromising the structure-function properties of the biomaterial. This study demonstrates the importance of a sequential, differential protein solubilization approach to reduce biomaterial antigenicity in the production of a xenogeneic scaffold for heart valve tissue engineering.

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Crossref · 10.1016/j.actbio.2012.12.034

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Authors
Wong, M. L., Wong, J. L., Athanasiou, K. A., & Griffiths, L. G.
Affiliations
University of California, Davis (US)
Corresponding author
Griffiths, Leigh G.
Venue
Acta Biomaterialia
Publisher
Elsevier BV
Published
2013-05
Volume
9
Issue
5
Pages
6492-6501
ISSN
1742-7061 (ISSN-L)
OpenAlex
W2054800475
Cited by
65
References
38
Citations by year
2026: 3 · 2024: 3 · 2023: 5 · 2022: 2 · 2021: 4 · 2020: 5 · 2019: 6 · 2018: 10 · 2017: 5 · 2016: 8 · 2015: 8 · 2014: 4 · 2013: 2
FWCI
6.68
Type
journal article
Language
en
Open access
closed
Locations
  • Acta Biomaterialia (publishedVersion)
  • PubMed (publishedVersion)
Funders
American Heart Association (11SDG4980023)
Topics
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Health Sciences › Medicine › Surgery › Xenotransplantation and immune response
  • Physical Sciences › Materials Science › Biomaterials › Collagen: Extraction and Characterization
Keywords
antigen removal, decellularized tissue, bovine pericardium, protein solubilization, dithiothreitol, sodium dodecyl sulfate, galactose-alpha-1,3-galactose, MHC class I, heart valve tissue engineering, xenotransplantation, tensile properties
MeSH terms
Animals, Cattle, Solubility, Tissue Engineering, Tissue Scaffolds

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