Heparin-functionalized collagen matrices with controlled release of basic fibroblast growth factor.
Tissue engineering scaffolds with controlled long-term release of growth factors are constructed in an attempt to mimic the intelligent ability of the extracellular matrix (ECM) to release endogenous growth factors. In this study, collagen sponges (Collagen group) were modified by N-(3-dimethylaminopropyl)-N-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) crosslinking (EDC/NHS group) and heparin immobilization (EDC/NHS-H group), and subsequently seeded with human umbilical vein endothelial cells (HUVECs). Native and modified sponges were pre-adsorbed with basic fibroblast growth factor (bFGF) to evaluate the sustained release and bioactive maintenance of bFGF from the sponges. We found that modified collagen matrices permitted HUVECs to proliferate and migrate well and to distribute uniformly. The EDC/NHS-H group exhibited an excellent sustained-release profile and bioactive maintenance of the pre-adsorbed bFGF as compared with the Collagen and EDC/NHS groups. These results suggest that heparin-functionalized collagen matrices can support a controlled release of bFGF and thus, have potential as a tissue engineering scaffold.
School of Materials Science and Engineering, Tianjin University, Tianjin, China. whujimin07@yahoo.com.cn
J M
JM
Wu
Y Y
YY
Xu
Z H
ZH
Li
X Y
XY
Yuan
P F
PF
Wang
X Z
XZ
Zhang
Y Q
YQ
Liu
J
J
Guan
Y
Y
Guo
R X
RX
Li
H
H
Zhang
D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D003094:Collagen / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D003692:Delayed-Action Preparations; D004337:Drug Carriers / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism*; D042783:Endothelial Cells / Q000187:drug effects / Q000502:physiology; D005109:Extracellular Matrix / Q000737:chemistry / Q000378:metabolism*; D016222:Fibroblast Growth Factor 2 / Q000737:chemistry / Q000493:pharmacokinetics*; D006493:Heparin / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D013997:Time Factors
D001672:Biocompatible Materials; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D016222:Fibroblast Growth Factor 2; D006493:Heparin; D003094:Collagen