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Ultrasound preexposure improves endothelial cell binding and retention on biomaterial surfaces
Author(s) -
Hsu Shanhui,
Huang Tsungbin,
Chuang Shangchi,
Tsai IJine,
Chen David C.
Publication year - 2006
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30345
Subject(s) - biomaterial , endothelial stem cell , chemistry , cell , ultrasound , biomedical engineering , biophysics , microbiology and biotechnology , medicine , biology , biochemistry , radiology , in vitro
In spite of the extensive studies regarding the effects of ultrasound on biological systems, the influence of low‐intensity ultrasound on endothelial cells has rarely been investigated. In this work, the effect of ultrasound in improving the binding between endothelial cells and biomaterial substrates was evaluated. Based on the results, low‐intensity ultrasound could change the morphology and matrix secretion of endothelial cells, and such effects persisted when preexposed cells were seeded to another substrate. The cells preexposed to ultrasound were spread further on the substrate. The actin stress fibers of ultrasound‐preexposed cells on RGD‐modified surfaces were especially intense and well oriented. Ultrasound could probably activate cellular integrins and subsequently allow RGD to bind them. A much firmer adhesion of ultrasound‐preexposed endothelial cells to the biomaterial surface coated with the RGD‐containing protein was demonstrated. Finally, polyurethane small‐diameter vascular grafts seeded with ultrasound‐preexposed endothelial cells showed enhanced cell retention on graft surfaces upon flushing. © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2006