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Author Notes:

Johnna S. Temenoff: johnna.temenoff@bme.gatech.edu

The authors would like to acknowledge Dr. Tobias Miller and Dr. Yifeng Peng for assistance with heparin material synthesis.

The authors declare no competing financial interest

Subjects:

Research Funding:

The human MSCs employed in these studies were provided by the Texas A&M Health Science Center College of Medicine Institute for Regenerative Medicine at Scott & White through a grant from NCRR of the NIH, Grant #P40RR017447.

This work was supported by an NSF DMR (1207045) grant awarded to JST, and grants from the National Institutes of Health (R01HL093282) and Environmental Protection Agency (835737) to WLM.

Keywords:

  • Science & Technology
  • Life Sciences & Biomedicine
  • Physical Sciences
  • Biochemical Research Methods
  • Biochemistry & Molecular Biology
  • Chemistry, Multidisciplinary
  • Chemistry, Organic
  • Chemistry
  • MICROMOLDED NONADHESIVE HYDROGELS
  • FIBROBLAST GROWTH-FACTOR
  • PANCREATIC-ISLETS
  • CULTURE
  • TISSUE
  • MICROTISSUES
  • ANGIOGENESIS
  • OSTEOBLASTS
  • RECEPTOR

Combination of Heparin Binding Peptide and Heparin Cell Surface Coatings for Mesenchymal Stem Cell Spheroid Assembly

Tools:

Journal Title:

Bioconjugate Chemistry

Volume:

Volume 29, Number 4

Publisher:

, Pages 878-884

Type of Work:

Article | Post-print: After Peer Review

Abstract:

Microtissues containing multiple cell types have been used in both in vitro models and in vivo tissue repair applications. However, to improve throughput, there is a need to develop a platform that supports self-assembly of a large number of 3D microtissues containing multiple cell types in a dynamic suspension system. Thus, the objective of this study was to exploit the binding interaction between the negatively charged glycosaminoglycan, heparin, and a known heparin binding peptide to establish a method that promotes assembly of mesenchymal stem cell (MSC) spheroids into larger aggregates. We characterized heparin binding peptide (HEPpep) and heparin coatings on cell surfaces and determined the specificity of these coatings in promoting assembly of MSC spheroids in dynamic culture. Overall, combining spheroids with both coatings promoted up to 70 ± 11% of spheroids to assemble into multiaggregate structures, as compared to only 10 ± 4% assembly when cells having the heparin coating were cultured with cells coated with a scrambled peptide. These results suggest that this self-assembly method represents an exciting approach that may be applicable for a wide range of applications in which cell aggregation is desired.

Copyright information:

© 2018 American Chemical Society.

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