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Aligned multilayered electrospun scaffolds for rotator cuff tendon tissue engineering.

Publication ,  Journal Article
Orr, SB; Chainani, A; Hippensteel, KJ; Kishan, A; Gilchrist, C; Garrigues, NW; Ruch, DS; Guilak, F; Little, D
Published in: Acta Biomater
September 2015

UNLABELLED: The rotator cuff consists of several tendons and muscles that provide stability and force transmission in the shoulder joint. Whereas most rotator cuff tears are amenable to suture repair, the overall success rate of repair is low, and massive tears are prone to re-tear. Extracellular matrix (ECM) patches are used to augment suture repair, but they have limitations. Tissue-engineered approaches provide a promising solution for massive rotator cuff tears. Previous studies have shown that, compared to nonaligned scaffolds, aligned electrospun polymer scaffolds exhibit greater anisotropy and exert a greater tenogenic effect. Nevertheless, achieving rapid cell infiltration through the full thickness of the scaffold is challenging, and scaling to a translationally relevant size may be difficult. Our goal was to evaluate whether a novel method of alignment, combining a multilayered electrospinning technique with a hybrid of several electrospinning alignment techniques, would permit cell infiltration and collagen deposition through the thickness of poly(ε-caprolactone) scaffolds following seeding with human adipose-derived stem cells. Furthermore, we evaluated whether multilayered aligned scaffolds enhanced collagen alignment, tendon-related gene expression, and mechanical properties compared to multilayered nonaligned scaffolds. Both aligned and nonaligned multilayered scaffolds demonstrated cell infiltration and ECM deposition through the full thickness of the scaffold after only 28days of culture. Aligned scaffolds displayed significantly increased expression of tenomodulin compared to nonaligned scaffolds and exhibited aligned collagen fibrils throughout the full thickness, the presence of which may account for the increased yield stress and Young's modulus of cell-seeded aligned scaffolds along the axis of fiber alignment. STATEMENT OF SIGNIFICANCE: Rotator cuff tears are an important clinical problem in the shoulder, with over 300,000 surgical repairs performed annually. Re-tear rates may be high, and current methods used to augment surgical repair have limited evidence to support their clinical use due to inadequate initial mechanical properties and slow cellular infiltration. Tissue engineering approaches such as electrospinning have shown similar challenges in previous studies. In this study, a novel technique to align electrospun fibers while using a multilayered approach demonstrated increased mechanical properties and development of aligned collagen through the full thickness of the scaffolds compared to nonaligned multilayered scaffolds, and both types of scaffolds demonstrated rapid cell infiltration through the full thickness of the scaffold.

Duke Scholars

Published In

Acta Biomater

DOI

EISSN

1878-7568

Publication Date

September 2015

Volume

24

Start / End Page

117 / 126

Location

England

Related Subject Headings

  • Tissue Scaffolds
  • Tissue Engineering
  • Stem Cells
  • Rotator Cuff
  • Polyesters
  • Humans
  • Extracellular Matrix
  • Cells, Cultured
  • Biomedical Engineering
  • Adipose Tissue
 

Citation

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Orr, S. B., Chainani, A., Hippensteel, K. J., Kishan, A., Gilchrist, C., Garrigues, N. W., … Little, D. (2015). Aligned multilayered electrospun scaffolds for rotator cuff tendon tissue engineering. Acta Biomater, 24, 117–126. https://doi.org/10.1016/j.actbio.2015.06.010
Orr, Steven B., Abby Chainani, Kirk J. Hippensteel, Alysha Kishan, Christopher Gilchrist, N William Garrigues, David S. Ruch, Farshid Guilak, and Dianne Little. “Aligned multilayered electrospun scaffolds for rotator cuff tendon tissue engineering.Acta Biomater 24 (September 2015): 117–26. https://doi.org/10.1016/j.actbio.2015.06.010.
Orr SB, Chainani A, Hippensteel KJ, Kishan A, Gilchrist C, Garrigues NW, et al. Aligned multilayered electrospun scaffolds for rotator cuff tendon tissue engineering. Acta Biomater. 2015 Sep;24:117–26.
Orr, Steven B., et al. “Aligned multilayered electrospun scaffolds for rotator cuff tendon tissue engineering.Acta Biomater, vol. 24, Sept. 2015, pp. 117–26. Pubmed, doi:10.1016/j.actbio.2015.06.010.
Orr SB, Chainani A, Hippensteel KJ, Kishan A, Gilchrist C, Garrigues NW, Ruch DS, Guilak F, Little D. Aligned multilayered electrospun scaffolds for rotator cuff tendon tissue engineering. Acta Biomater. 2015 Sep;24:117–126.
Journal cover image

Published In

Acta Biomater

DOI

EISSN

1878-7568

Publication Date

September 2015

Volume

24

Start / End Page

117 / 126

Location

England

Related Subject Headings

  • Tissue Scaffolds
  • Tissue Engineering
  • Stem Cells
  • Rotator Cuff
  • Polyesters
  • Humans
  • Extracellular Matrix
  • Cells, Cultured
  • Biomedical Engineering
  • Adipose Tissue