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Full-Text Articles in Biomedical Engineering and Bioengineering

Chemically Modified Monolayer Surfaces Influence Valvular Interstitial Cell Attachment And Differentiation For Heart Valve Tissue Engineering, Matthew N. Rush Dec 2018

Chemically Modified Monolayer Surfaces Influence Valvular Interstitial Cell Attachment And Differentiation For Heart Valve Tissue Engineering, Matthew N. Rush

Nanoscience and Microsystems ETDs

As a cell mediated-process, valvular heart disease (VHD) results in significant morbidity and mortality world-wide. In the US alone, valvular heart disease VHD is estimated to affect 2.5% of the population with a disproportionate impact on an increasing elderly populous. It is well understood that the primary driver for valvular calcification is the differentiation of valvular interstitial cells (VICs) into an osteoblastic-like phenotype. However, the factors leading to the onset of osteoblastic-like VICs (obVICs) and resulting calcification are not fully understood and a more complete characterization of VIC differentiation and phenotypic change is required before treatment of valve disease ...


Amphiphilic Degradable Polymer/Hydroxyapatite Composites As Smart Bone Tissue Engineering Scaffolds: A Dissertation, Artem B. Kutikov Nov 2014

Amphiphilic Degradable Polymer/Hydroxyapatite Composites As Smart Bone Tissue Engineering Scaffolds: A Dissertation, Artem B. Kutikov

GSBS Dissertations and Theses

Over 600,000 bone-grafting operations are performed each year in the United States. The majority of the bone used for these surgeries comes from autografts that are limited in quantity or allografts with high failure rates. Current synthetic bone grafting materials have poor mechanical properties, handling characteristics, and bioactivity. The goal of this dissertation was to develop a clinically translatable bone tissue engineering scaffold with improved handling characteristics, bioactivity, and smart delivery modalities. We hypothesized that this could be achieved through the rational selection of Food and Drug Administration (FDA) approved materials that blend favorably with hydroxyapatite (HA), the principle ...


Humidity Effect On The Structure Of Electrospun Core-Shell Pcl-Peg Fibers For Tissue Regeneration Applications, Adam P. Golin Apr 2014

Humidity Effect On The Structure Of Electrospun Core-Shell Pcl-Peg Fibers For Tissue Regeneration Applications, Adam P. Golin

Electronic Thesis and Dissertation Repository

With the aim of creating a biodegradable scaffold for tympanic membrane (TM) tissue regeneration, core-shell nanofibers composed of a poly(caprolactone) shell and a poly(ethylene glycol) core were created using a coaxial electrospinning technique. In order to create fibers with an optimal core-shell morphology, the effect of relative humidity (RH) on the core-shell nanofibers was systematically studied, with a FITC-BSA complex encapsulated in the core to act as a model protein. The core-shell nanofibers were electrospun at relative humidity values of 20, 25, 30, and 40% RH within a glove box outfitted for humidity control. The core-shell morphology of ...


Nanomechanics Of Electrospun Nanofibres For Tissue Engineering Of The Tympanic Membrane, Sara Makaremi Dec 2012

Nanomechanics Of Electrospun Nanofibres For Tissue Engineering Of The Tympanic Membrane, Sara Makaremi

Electronic Thesis and Dissertation Repository

The Tympanic Membrane (TM), also known as the eardrum, includes layers of organized collagen nanofibres which play an essential role in sound transmission. Perforations that are caused by infection or accident must be repaired in order to restore hearing. Tympanoplasty is performed using grafts that are prepared from bladder, cartilage, temporal fascia and cadaveric skin. However, since mechanical properties of these grafts do not match those of the original TM, normal hearing is not fully restored. The goal of this study is to develop nanofibrous scaffolds for tissue engineering of the TM in order to circumvent the complications addressed with ...


Characterization And Implementation Of A Decellularized Porcine Vessel As A Biologic Scaffold For A Blood Vessel Mimic, Aubrey N. Smith Jun 2011

Characterization And Implementation Of A Decellularized Porcine Vessel As A Biologic Scaffold For A Blood Vessel Mimic, Aubrey N. Smith

Master's Theses and Project Reports

Every 34 seconds, someone in the United States suffers from a heart attack. Most heart attacks are caused by atherosclerotic build up in the coronary arteries, occluding normal blood flow. Balloon angioplasty procedures in combination with a metal stent often result in successful restoration of normal blood flow. However, bare metal stents often lead to restenosis and other complications. To compensate for this problem, industry has created drug-eluting stents to promote healing of the artery wall post stenting. These stents are continually advancing toward better drug-eluting designs and methods, resulting in a need for fast and reliable pre-clinical testing modalities ...


An Investigation Of Process Parameters To Optimize The Fiber Diameter Of Electrospun Vascular Scaffolds Through Experimental Design, Steffi Wong Dec 2010

An Investigation Of Process Parameters To Optimize The Fiber Diameter Of Electrospun Vascular Scaffolds Through Experimental Design, Steffi Wong

Biomedical Engineering

No abstract provided.


Regulation Of Angiogenesis By Adhesive And Mechanical Cues From The Extracellular Matrix, Colette Shen May 2010

Regulation Of Angiogenesis By Adhesive And Mechanical Cues From The Extracellular Matrix, Colette Shen

Publicly Accessible Penn Dissertations

Angiogenesis, the sprouting of new capillaries from existing blood vessels, is essential for the survival of tissues and normally occurs during development and wound healing. Successful vascularization of engineered tissues is currently a major challenge, as it is critical for the survival and incorporation of implanted tissue replacements. While the role of soluble factors in regulating angiogenesis is well established, there is significant interest in uncovering the contributions of cellular interactions with the extracellular matrix (ECM). We chose to study the role of cell-ECM adhesion in regulating angiogenesis, with the hypothesis that quantitative changes in the degree of cell-ECM adhesion ...