Journal article
Prevascularized silicon membranes for the enhancement of transport to implanted medical devices
Journal of biomedical materials research. Part B, Applied biomaterials, Vol.104(8), pp.1602-1609
11/2016
DOI: 10.1002/jbm.b.33506
PMCID: PMC4769984
PMID: 26316050
Abstract
Recent advances in drug delivery and sensing devices for in situ applications are limited by the diffusion-limiting foreign body response of fibrous encapsulation. In this study, we fabricated prevascularized synthetic device ports to help mitigate this limitation. Membranes with rectilinear arrays of square pores with widths ranging from 40 to 200 μm were created using materials (50 μm thick double-sided polished silicon) and processes (photolithography and directed reactive ion etching) common in the manufacturing of microfabricated sensors. Vascular endothelial cells responded to membrane geometry by either forming vascular tubes that extended through the pore or completely filling membrane pores after 4 days in culture. Although tube formation began to predominate overgrowth around 75 μm and continued to increase at even larger pore sizes, tubes formed at these large pore sizes were not completely round and had relatively thin walls. Thus, the optimum range of pore size for prevascularization of these membranes was estimated to be 75-100 μm. This study lays the foundation for creating a prevascularized port that can be used to reduce fibrous encapsulation and thus enhance diffusion to implanted medical devices and sensors. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1602-1609, 2016.
Details
- Title: Subtitle
- Prevascularized silicon membranes for the enhancement of transport to implanted medical devices
- Creators
- Kristan S Worthington - Stephen A. Wynn Institute for Vision Research, Department of Opthamology and Visual Sciences, The University of Iowa, Iowa City, IowaLuke A Wiley - University of Iowa, Ophthalmology and Visual SciencesRobert F Mullins - Stephen A. Wynn Institute for Vision Research, Department of Opthamology and Visual Sciences, The University of Iowa, Iowa City, IowaBudd A Tucker - Stephen A. Wynn Institute for Vision Research, Department of Opthamology and Visual Sciences, The University of Iowa, Iowa City, IowaEric Nuxoll - Department of Chemical and Biochemical Engineering, The University of Iowa, Iowa City, Iowa. eric-nuxoll@uiowa.edu
- Resource Type
- Journal article
- Publication Details
- Journal of biomedical materials research. Part B, Applied biomaterials, Vol.104(8), pp.1602-1609
- DOI
- 10.1002/jbm.b.33506
- PMID
- 26316050
- PMCID
- PMC4769984
- NLM abbreviation
- J Biomed Mater Res B Appl Biomater
- ISSN
- 1552-4973
- eISSN
- 1552-4981
- Publisher
- United States
- Grant note
- DP2 OD007483 / NIH HHS R01 EY024605 / NEI NIH HHS S10 RR022498 / NCRR NIH HHS
- Language
- English
- Date published
- 11/2016
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Iowa Neuroscience Institute; Pharmaceutical Sciences and Experimental Therapeutics; Chemical and Biochemical Engineering; Ophthalmology and Visual Sciences
- Record Identifier
- 9983979996002771
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