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158 full-text articles. Page 7 of 7.

Targeted Identification Of Metastasis-Associated Cell-Surface Sialoglycoproteins In Prostate Cancer, Lifang Yang, Julius O. Nyalwidhe, Sigi Guo, Richard R. Drake, O. John Semmes 2011 Old Dominion University

Targeted Identification Of Metastasis-Associated Cell-Surface Sialoglycoproteins In Prostate Cancer, Lifang Yang, Julius O. Nyalwidhe, Sigi Guo, Richard R. Drake, O. John Semmes

Bioelectrics Publications

Covalent attachment of carbohydrates to proteins is one of the most common post-translational modifications. At the cell surface, sugar moieties of glycoproteins contribute to molecular recognition events involved in cancer metastasis. We have combined glycan metabolic labeling with mass spectrometry analysis to identify and characterize metastasis-associated cell surface sialoglycoproteins. Our model system used syngeneic prostate cancer cell lines derived from PC3 (N2, nonmetastatic, and ML2, highly metastatic). The metabolic incorporation of AC4ManNAz and subsequent specific labeling of cell surface sialylation was confirmed by flow cytometry and confocal microscopy. Affinity isolation of the modified sialic-acid containing cell surface proteins ...


Sub-Wavelength Plasmonic Readout For Direct Linear Analysis Of Optically Tagged Dna, Jonathan Varsanik, William Teynor, John LeBlanc, Heather Clark, Jeffrey Krogmeier, Tian Yang, Jonathan Bernstein 2010 Massachusetts Institute of Technology

Sub-Wavelength Plasmonic Readout For Direct Linear Analysis Of Optically Tagged Dna, Jonathan Varsanik, William Teynor, John Leblanc, Heather Clark, Jeffrey Krogmeier, Tian Yang, Jonathan Bernstein

Heather Clark

This work describes the development and fabrication of a novel nanofluidic flow-through sensing chip that utilizes a plasmonic resonator to excite fluorescent tags with sub-wavelength resolution. We cover the design of the microfluidic chip and simulation of the plasmonic resonator using Finite Difference Time Domain (FDTD) software. The fabrication methods are presented, with testing procedures and preliminary results. This research is aimed at improving the resolution limits of the Direct Linear Analysis (DLA) technique developed by US Genomics. In DLA, intercalating dyes which tag a specific 8 base-pair sequence are inserted in a DNA sample. This sample is pumped though ...


A Coupled Finite Element-Boundary Element Method For Modeling Diffusion Equation In 3d Multi-Modality Optical Imaging, Subhadra Srinivasan, Hamid R. Ghadyani, Brian W. Pogue, Keith D. Paulsen 2010 Dartmouth College

A Coupled Finite Element-Boundary Element Method For Modeling Diffusion Equation In 3d Multi-Modality Optical Imaging, Subhadra Srinivasan, Hamid R. Ghadyani, Brian W. Pogue, Keith D. Paulsen

Open Dartmouth: Faculty Open Access Articles

Three dimensional image reconstruction for multi-modality optical spectroscopy systems needs computationally efficient forward solvers with minimum meshing complexity, while allowing the flexibility to apply spatial constraints. Existing models based on the finite element method (FEM) require full 3D volume meshing to incorporate constraints related to anatomical structure via techniques such as regularization. Alternate approaches such as the boundary element method (BEM) require only surface discretization but assume homogeneous or piece-wise constant domains that can be limiting. Here, a coupled finite element-boundary element method (coupled FE-BEM) approach is demonstrated for modeling light diffusion in 3D, which uses surfaces to model exterior ...


Application Of Poly(Amidoamine) Dendrimers For Use In Bionanomotor Systems, Madhukar Babu Kolli, B. Scott Day, Hideyo Takatsuki, Siva Krishna Nalabotu, Kevin M. Rice, Kazuhiro Kohama, Murali K. Gadde, Anjaiah Katta, Eric R. Blough 2010 Marshall University

Application Of Poly(Amidoamine) Dendrimers For Use In Bionanomotor Systems, Madhukar Babu Kolli, B. Scott Day, Hideyo Takatsuki, Siva Krishna Nalabotu, Kevin M. Rice, Kazuhiro Kohama, Murali K. Gadde, Anjaiah Katta, Eric R. Blough

MIIR Faculty Research

The study and utilization of bionanomotors represents a rapid and progressing field of nanobiotechnology. Here, we demonstrate that poly(amidoamine) (PAMAM) dendrimers are capable of supporting heavy meromyosin dependent actin motility of similar quality to that observed using nitrocellulose, and that microcontact printing of PAMAM dendrimers can be exploited to produce tracks of active myosin motors leading to the restricted motion of actin filaments across a patterned surface. These data suggest that the use of dendrimer surfaces will increase the applicability of using protein biomolecular motors for nanotechnological applications.


Robotic Simulation Of Disc Arthroplasty Surgery: Influence Of Surgical Placement On Motion Segment Dynamics, Braham K. Dhillon 2010 University of Tennessee Health Science Center

Robotic Simulation Of Disc Arthroplasty Surgery: Influence Of Surgical Placement On Motion Segment Dynamics, Braham K. Dhillon

Theses and Dissertations (ETD)

A variety of total disc replacement (TDR) designs exist for the treatment of disc pathologies. A key design parameter for a constrained ball and socket device is the location of the fixed center of rotation (COR). A previous study demonstrated that intact motion segment unit (MSU) mechanics and range of motion (ROM) were sensitive to the location of a prescribed sagittal plane rotational axis. Mal-alignment between the implant COR and the COR of the MSU may lead to an overloaded or over constrained condition.

Two paradigms exist for the placement of a fixed COR TDR device relative to MSU anatomy ...


A Passive Pure Moment Protocol For Testing Spine Segments: Development And Application, Kyle David Fraysur 2010 University of Tennessee Health Science Center

A Passive Pure Moment Protocol For Testing Spine Segments: Development And Application, Kyle David Fraysur

Theses and Dissertations (ETD)

The pure moment protocol is the accepted standard for performing in-vitro biomechanical testing of spinal devices. Published studies predominantly report range of motion and flexibility data, but information regarding the segment center of rotation is also relevant. Most current pure moment platforms are not sensitive enough to accurately calculate the instantaneous axis of rotation (IAR) for a segment throughout a bending motion. The purpose of this study was to simulate a pure moment protocol using a programmable spine robot, and use the data gathered to calculate the IAR for harvested specimen and those implanted with a constrained total disc replacement ...


Synthesis Of An Endothelial Cell Mimicking Surface Containing Thrombomodulin And Endothelial Protein C Receptor, Karl E. Kador 2010 University of Nebraska at Lincoln

Synthesis Of An Endothelial Cell Mimicking Surface Containing Thrombomodulin And Endothelial Protein C Receptor, Karl E. Kador

Chemical & Biomolecular Engineering Theses, Dissertations, & Student Research

Synthetic materials for use in blood contacting applications have been studied for many years with limited success. One of the main areas of need for these materials is the design of synthetic vascular grafts for use in the hundreds of thousands of patients who have coronary artery bypass grafting, many without suitable veins for autologous grafts. The design of these grafts is constrained by two common modes of failure, the formation of intimal hyperplasia (IH) and thrombosis. IH formation has been previously linked to a mismatching of the mechanical properties of the graft and has been overcome by creating grafts ...


Chronic Inflammatory Responses To Microgel-Based Implant Coatings, Amanda W. Bridges, Rachel E. Whitmire, Neetu Singh, Kellie L. Templeman, Julia E. Babensee, L. Andrew Lyon, Andrés J. García 2010 Georgia Institute of Technology

Chronic Inflammatory Responses To Microgel-Based Implant Coatings, Amanda W. Bridges, Rachel E. Whitmire, Neetu Singh, Kellie L. Templeman, Julia E. Babensee, L. Andrew Lyon, Andrés J. García

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Inflammatory responses to implanted biomedical devices elicit a foreign body fibrotic reaction that limits device integration and performance in various biomedical applications. We examined chronic inflammatory responses to microgel conformal coatings consisting of thin films of poly(N-isopropylacrylamide) hydrogel microparticles cross-linked with poly(ethylene glycol) diacrylate deposited on poly(ethylene terephthalate) (PET). Unmodified and microgel-coated PET disks were implanted subcutaneously in rats for 4 weeks and explants were analyzed by histology and immunohistochemistry. Microgel coatings reduced chronic inflammation and resulted in a more mature/organized fibrous capsule. Microgel-coated samples exhibited 22% thinner fibrous capsules that contained 40% fewer cells compared ...


Electroconvulsive Shock Ameliorates Disease Processes And Extends Survival In Huntington Mutant Mice, Akanksha Baharani 2010 University of Central Florida

Electroconvulsive Shock Ameliorates Disease Processes And Extends Survival In Huntington Mutant Mice, Akanksha Baharani

Electronic Theses and Dissertations

Huntington's disease (HD) is a devastating autosomal dominantly inherited neurological disorder caused by an abnormal expansion of CAG trinucleotide repeats in the gene coding for the Nterminal region of the huntingtin (Htt) protein, which leads to the formation of a polyglutamine stretch. The greater the CAG repeats, the earlier the onset of the disease. The polyglutamine stretch destabilizes the Htt protein leading to misfolding, abnormal processing, aggregation, and inclusion formation. Mutant Htt protein is believed to damage and kill neurons in the striatum by a mechanism involving increased oxidative and metabolic stress, and impaired adaptive cellular stress responses. A ...


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