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Issue 5, 2011
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Subcellular spatial segregation of integrin subtypes by patterned multicomponent surfaces

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Abstract

While it is well known that individual integrins are critical mediators of cell behavior, recent work has shown that when multiple types of integrins simultaneously engage the ECM, cell functions are enhanced. However, it is not known how integrins spatially coordinate to regulate cell adhesion because no reliable method exists to segregate integrins on the cell membrane. Here, we use a microcontact printing-based strategy to pattern multiple ECMs that bind distinct integrins in order to study how integrins might interact. In our technique, proteins are first adsorbed uniformly to a poly(dimethyl siloxane) stamp, and then selectively “de-inked.” Our strategy overcomes several inherent limitations of conventional microcontact printing, including stamp collapse and limited functionality of the surface patterns. We show that integrins spatially segregate on surfaces patterned with multiple ECMs, as expected. Interestingly, despite spatial segregation of distinct integrins, cells could form adhesions and migrate across multicomponent surfaces as well as they do on single component surfaces. Together, our data indicate that although cells can segregate individual integrins on the cell surface to mediate ECM-specific binding, integrins function cooperatively to guide cell adhesion and migration.

Graphical abstract: Subcellular spatial segregation of integrin subtypes by patterned multicomponent surfaces

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Publication details

The article was received on 20 Oct 2010, accepted on 19 Jan 2011 and first published on 04 Feb 2011


Article type: Paper
DOI: 10.1039/C0IB00129E
Citation: Integr. Biol., 2011,3, 560-567
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    Subcellular spatial segregation of integrin subtypes by patterned multicomponent surfaces

    R. A. Desai, M. K. Khan, S. B. Gopal and C. S. Chen, Integr. Biol., 2011, 3, 560
    DOI: 10.1039/C0IB00129E

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