Photopolymerizable nanoarray hydrogels deliver CNTF and promote differentiation of neural stem cells

Stephany Tzeng, Erin B. Lavik

Research output: Contribution to journalArticle

Abstract

One of the goals in neural tissue engineering is to be able to direct the repair and replacement of lost cells and tissue. This will likely involve a multifactorial approach that combines cells, an appropriate scaffold, and drug delivery. In many cases, this system will also need to be able to be delivered in a minimally invasive manner. To address these needs, we have developed a new nanoarray scaffold that can deliver a growth factor over a few weeks, is photopolymerizable to permit minimally invasive administration, and supports the encapsulation, migration, and differentiation of cells. As a model system, we have focused on delivering ciliary neurotrophic factor (CNTF) and neural stem cells (NSCs). CNTF has been shown to be neuroprotective in the central nervous system and also directs NSCs to differentiate, suggesting that it may be useful in treating or engineering tissues of the nervous system. However, combining CNTF delivery with a scaffold to support the growth of neural cells and tissue has been challenging. Here CNTF-loaded nanospheres based on poly(d,l-lactic-co- glycolic acid) (PLGA) were surface-modified with acrylated poly(ethylene glycol) (PEG) and crosslinked into a photopolymerizable poly-l-lysine/PEG hydrogel to act as both a tissue engineering scaffold and a drug delivery system. When NSCs were encapsulated in this CNTF-loaded construct, we observed high survival rates and significant differentiation to mature phenotypes. This allows us to tailor the microenvironment to engineer tissues in new ways.

Original languageEnglish (US)
Pages (from-to)2208-2215
Number of pages8
JournalSoft Matter
Volume6
Issue number10
DOIs
StatePublished - May 21 2010

Fingerprint

Ciliary Neurotrophic Factor
Hydrogels
stem cells
Stem cells
Tissue engineering
Scaffolds
tissue engineering
Polyethylene glycols
glycolic acid
Neurology
Tissue
delivery
Cells
Tissue Scaffolds
drugs
cells
Nanospheres
Hydrogel
nervous system
central nervous system

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Photopolymerizable nanoarray hydrogels deliver CNTF and promote differentiation of neural stem cells. / Tzeng, Stephany; Lavik, Erin B.

In: Soft Matter, Vol. 6, No. 10, 21.05.2010, p. 2208-2215.

Research output: Contribution to journalArticle

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