کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10694 698 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The covalent attachment of adhesion molecules to silicone membranes for cell stretching applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
The covalent attachment of adhesion molecules to silicone membranes for cell stretching applications
چکیده انگلیسی

Strain devices with expandable polydimethylsiloxane (PDMS) culture membranes are frequently used to stretch cells in vitro, mimicking mechanically dynamic tissue environments. To immobilize cell-adhesive molecules to the otherwise non-adhesive PDMS substrate, hydrophobic, electrostatic and covalent surface coating procedures have been developed. The efficacy of different coating strategies to transmit stretches to cells however is poorly documented and has not been compared. We describe a novel and simple procedure to covalently bind extracellular matrix proteins to the surface of stretchable PDMS membranes. The method comprises PDMS oxygenation, silanization, and covalent protein cross-linking to the silane. We demonstrate improved attachment (∼2-fold), spreading (∼2.5-fold) and proliferation (∼1.2-fold) of fibroblasts to our new coating over established coating procedures. Further, we compared the efficiency of different PDMS coating techniques to transmit stretches. After 15% stretch, the number of maximally (15 ± 5%) stretched cells on our PDMS surface coating was ∼7-fold higher compared with alternative coating protocols. Hence, covalent linkage of adhesive molecules is superior to non-covalent methods in providing a coating that resists large deformations and that fully transmit this stretch to cultured cells.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 30, Issue 9, March 2009, Pages 1781–1789
نویسندگان
, , , , , ,