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Hierarchical nanoengineered surfaces for enhanced cytoadhesion and drug delivery

Paper ID Volume ID Publish Year Pages File Format Full-Text
7717 561 2011 8 PDF Available
Title
Hierarchical nanoengineered surfaces for enhanced cytoadhesion and drug delivery
Abstract

Delivering therapeutics to mucosal tissues such as the nasal and gastrointestinal tracts is highly desirable due to ease of access and dense vasculature. However, the mucus layer effectively captures and removes most therapeutic macromolecules and devices. In previous work, we have shown that nanoengineered microparticles (NEMPs) adhere through the mucus layer, exhibiting up to 1000 times the pull-off force of an unmodified microsphere, and showing greater adhesion than some chemical targeting means. In this paper, we demonstrate that nanotopography improves device adhesion in vivo, increasing retention time up to ten-fold over unmodified devices. Moreover, we observe considerable adhesion in several cell lines using an in vitro shear flow model, indicating that this approach is promising for numerous tissues. We then demonstrate that nanowire-mediated adhesion is highly robust to variation in nanowire surface charge and cellular structure and function, and we characterize particle loading and elution. We present a form of cytoadhesion that utilizes the physical interaction of nanoengineered surfaces with subcellular structures to produce a robust and versatile cytoadhesive for drug delivery. These nanoscale adhesive mechanisms are also relevant to fields such as tissue engineering and wound healing because they likely affect stem cell differentiation, cell remodeling, migration, etc.

Keywords
Actin; Adhesion; Cell adhesion; Drug delivery; Nanotopography; Surface Topography
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 32, Issue 13, May 2011, Pages 3499–3506
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us