Thermo-responsive peptide-modified hydrogels for tissue regeneration

被引:204
作者
Stile, RA
Healy, KE
机构
[1] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Mat Sci, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Dept Engn, Berkeley, CA 94720 USA
[4] Northwestern Univ, Robert R McCormick Sch Engn & Appl Sci, Dept Biomed Engn, Evanston, IL 60208 USA
关键词
D O I
10.1021/bm0000945
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Loosely cross-linked hydrogels consisting of N-isopropylacrylamide (NIPAAm) and acrylic acid (AAc) were synthesized, characterized, and used as model scaffolds for studying cell-material interactions in three-dimensions (3D). The AAc groups were functionalized with peptides containing the -RGD- and -FHRRIKA- sequences found in bone sialoprotein. Chemical modification of the hydrogels was verified via solid-state H-1 nuclear magnetic resonance spectroscopy, lower critical solution temperature studies, and volume change studies. The peptide-modified hydrogels were pliable at 22 degreesC and could be injected through a small-diameter aperture. Rat calvarial osteoblasts (RCO)seeded into the peptide-modified hydrogels were viable for at least 21 days of in vitro culture. The RCO spread more and demonstrated significantly greater proliferation when cultured within the peptide-modified hydrogels, as compared to control hydrogels. These peptide-modified P(NIPAAm-co-AAc) hydrogels serve as useful tools for studying cell-material interactions within 3D structures and have the potential to be used as injectable scaffolds for tissue engineering applications.
引用
收藏
页码:185 / 194
页数:10
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