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Biomimetic Micropatterning of Electrospun Scaffolds for Tissue Engineering

Jeffries, Eric M. (2015) Biomimetic Micropatterning of Electrospun Scaffolds for Tissue Engineering. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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The nanostructure of the extracellular matrix (ECM) can direct cell attachment, alignment, and organization. Similarly, ECM microstructures such as tubes and branched networks organize cells into larger functional units. To mimic this complex cellular microenvironment in tissue engineered scaffolds, we need new fabrication methods capable of constructing structures on both the nano- and micro-scale. Furthermore, these methods should be compatible with a variety of biomaterials to allow tailoring of mechanical and degradation properties. Electrospinning is a useful technique for creating fibrous scaffolds, but there have been few reports introducing microstructures.
This dissertation describes the development of a new versatile fabrication approach that combines electrospinning with a fused deposition modeling (FDM) 3D printer to create microstructures that mimic tissues. We hypothesized that these structures would improve cell migration and positioning within electrospun scaffolds. We tested this hypothesis by patterning scaffolds for peripheral nerves and microvascular networks. We first demonstrate the feasibility of templated electrospinning for generating linear channels in fibrous nerve guides that mimic the endoneurial/fascicular tubes of nerve and promote faster Schwann cell infiltration. This micropatterning technique was combined with FDM production of branched templates to create microvascular networks within fibrous scaffolds. Finally, material properties were improved by developing a technique to fabricates scaffolds with electrospun poly(glycerol sebacate)(PGS).


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Jeffries, Eric M.emj12@pitt.eduEMJ12
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWang, Yadongyaw20@pitt.eduYAW20
Committee MemberOudega, Martinmoudega@pitt.eduMOUDEGA
Committee MemberWagner, William Rwagnerwr@upmc.eduWAGNER
Committee MemberWeber,
Date: 29 January 2015
Date Type: Publication
Defense Date: 11 July 2014
Approval Date: 29 January 2015
Submission Date: 27 June 2014
Access Restriction: 1 year -- Restrict access to University of Pittsburgh for a period of 1 year.
Number of Pages: 122
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Bioengineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: electrospinning, micropatterning, additive manufacturing, tissue engineering, poly(glycerol sebacate)
Date Deposited: 29 Jan 2016 06:00
Last Modified: 19 Dec 2016 14:41


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