Potential of hydrogels based on poly(ethylene glycol) and sebacic acid as orthopedic tissue engineering scaffolds

Jinku Kim, Theresa E. Hefferan, Michael J Yaszemski, Lichun Lu

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

In this study, the bioactive effects of poly(ethylene glycol) (PEG) sebacic acid diacrylate (PEGSDA) hydrogels with or without RGD peptide modification on osteogenic differentiation and mineralization of marrow stromal cells (MSCs) were examined. In a separate experiment, the ability of PEGSDA hydrogel to serve as a delivery vehicle for bone morphogenetic protein 2 (BMP-2) was also investigated. As a scaffold, the attachment and proliferation of MSCs on PEGSDA hydrogel scaffolds with and without RGD peptide modification was similar to the control, tissue culture polystyrene. In contrast, cells were barely seen on unmodified PEG diacrylate (PEGDA) hydrogel throughout the culture period for up to 21 days. Osteogenic phenotypic expression such as alkaline phosphatase (ALP) of MSCs as well as mineralized calcium content were significantly higher on PEGSDA-based hydrogels than those on the control or PEGDA hydrogels. Potential use of PEGSDA scaffold as a delivery vehicle of osteogenic molecules such as BMP-2 was also evaluated. Initial burst release of BMP-2 from PEGSDA hydrogel scaffold (14.7%) was significantly reduced compared to PEGDA hydrogel scaffold (84.2%) during the first 3 days of a 21-day release period. ALP activity of an osteoblast was significantly higher in the presence of BMP-2 released from PEGSDA hydrogel scaffolds compared to that in the presence of BMP-2 released from PEGDA scaffolds, especially after 6 days of release. Overall, PEGSDA hydrogel scaffolds without further modification may be useful as orthopedic tissue engineering scaffolds as well as local drug carriers for prolonged sustained release of osteoinductive molecules.

Original languageEnglish (US)
Pages (from-to)2299-2307
Number of pages9
JournalTissue Engineering - Part A
Volume15
Issue number8
DOIs
StatePublished - Aug 1 2009

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Tissue Scaffolds
Hydrogels
Ethylene Glycol
Orthopedics
Tissue Engineering
Scaffolds (biology)
Hydrogel
Tissue engineering
Polyethylene glycols
Bone Morphogenetic Protein 2
Scaffolds
Acids
Stromal Cells
Bone
Bone Marrow
Proteins
Alkaline Phosphatase
Phosphatases
Drug Carriers
sebacic acid

ASJC Scopus subject areas

  • Bioengineering
  • Biochemistry
  • Biomedical Engineering
  • Biomaterials

Cite this

Potential of hydrogels based on poly(ethylene glycol) and sebacic acid as orthopedic tissue engineering scaffolds. / Kim, Jinku; Hefferan, Theresa E.; Yaszemski, Michael J; Lu, Lichun.

In: Tissue Engineering - Part A, Vol. 15, No. 8, 01.08.2009, p. 2299-2307.

Research output: Contribution to journalArticle

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