Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1134526
P. Wong, C. H. Kwong, T. Hsiai, C. Ho
This paper reports the study of the trajectory patterns that exist when monocyte and endothelial cells interact within the oscillatory flow known to be present in arterial bifurcations. The rolling and tumbling of monocytes, followed by the tethering and firm attachment to endothelial cells were observed. A cell tracking velocimetry algorithm was developed to characterize the real time cell-cell interactions. The algorithm allows tracking of large amounts of cell trajectories automatically, which is essential for statistical analysis of cell interaction events.
{"title":"Cell tracking velocimetry for monocyte/endothelial cell interactions","authors":"P. Wong, C. H. Kwong, T. Hsiai, C. Ho","doi":"10.1109/IEMBS.2002.1134526","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1134526","url":null,"abstract":"This paper reports the study of the trajectory patterns that exist when monocyte and endothelial cells interact within the oscillatory flow known to be present in arterial bifurcations. The rolling and tumbling of monocytes, followed by the tethering and firm attachment to endothelial cells were observed. A cell tracking velocimetry algorithm was developed to characterize the real time cell-cell interactions. The algorithm allows tracking of large amounts of cell trajectories automatically, which is essential for statistical analysis of cell interaction events.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90445794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1136951
J. H. van Zanten, Y. Har-el, J. Hanes
Non-viral vector formation by DNA complexation with cationic condensing agents is a self-assembly process driven primarily by electrostatic interactions and counterion release. DNA complexation kinetics influence three physical parameters that have a direct effect on gene delivery and expression efficiency: DNA complex geometric size, surface charge and density. We demonstrate the utility of time resolved multiangle laser light scattering (TR-MALLS) for probing polyethylenimine (PEI) based polyplex formation kinetics with plasmid DNA. Our studies utilize plasmid DNA coding for VEGF, which may be used to enhance blood vessel in-growth into cell seeded polymeric scaffolds used in tissue engineering applications. We determined PEI/DNA complex size and density in real time and monitored vector stability in various liquid formulations. Parameters such as PEI molecular weight, N/P ratio and solution pH and ionic strength were investigated systematically. The ability to accurately measure polyplex size and density may lead to improvements in the design and control of non-viral gene delivery vectors and facilitate the determination of optimal formulations.
{"title":"Optimization of PEI/VEGF DNA polyplexes for potenital delivery from tissue engineering scaffolds","authors":"J. H. van Zanten, Y. Har-el, J. Hanes","doi":"10.1109/IEMBS.2002.1136951","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1136951","url":null,"abstract":"Non-viral vector formation by DNA complexation with cationic condensing agents is a self-assembly process driven primarily by electrostatic interactions and counterion release. DNA complexation kinetics influence three physical parameters that have a direct effect on gene delivery and expression efficiency: DNA complex geometric size, surface charge and density. We demonstrate the utility of time resolved multiangle laser light scattering (TR-MALLS) for probing polyethylenimine (PEI) based polyplex formation kinetics with plasmid DNA. Our studies utilize plasmid DNA coding for VEGF, which may be used to enhance blood vessel in-growth into cell seeded polymeric scaffolds used in tissue engineering applications. We determined PEI/DNA complex size and density in real time and monitored vector stability in various liquid formulations. Parameters such as PEI molecular weight, N/P ratio and solution pH and ionic strength were investigated systematically. The ability to accurately measure polyplex size and density may lead to improvements in the design and control of non-viral gene delivery vectors and facilitate the determination of optimal formulations.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85674599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1134377
T.D. Coates, S. Wolpert
In this study, a minimally invasive interface to an intact peripheral nerve was developed. The interface was based on a cylindrical cuff installed around the nerve, and fitted with circumferentially dispersed surface electrodes. Differential measurements of bulk potentials were filtered, amplified, and subsequently processed with the objective of identifying unique patterns of electrical activity within the ensheathed nerve bundle. The system was implemented using an in vivo preparation of lateral eye and optic nerve from Limulus polyphemus. Recorded signals were filtered using the discrete wavelet transform and the Daubechies 4 wavelet basis to isolate signal components regarded as significant to the optical pattern. The entropies of the filtered signals were computed and used to build training and testing patterns for a cascade correlation neural network. The values on the eight outputs of the neural network represented the probability of one or more of the eight locations on the lateral eye having been illuminated by the stimulus. From these outputs, an image of the optical stimulus pattern was rendered. In tests, the system displayed an accuracy of 100% in distinguishing stimulus from nonstimulus conditions, and up to 91% in identifying the location(s) illuminated by a given pattern of optical stimulation.
{"title":"Elucidation of simple optic stimuli based on detected nerve activity","authors":"T.D. Coates, S. Wolpert","doi":"10.1109/IEMBS.2002.1134377","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1134377","url":null,"abstract":"In this study, a minimally invasive interface to an intact peripheral nerve was developed. The interface was based on a cylindrical cuff installed around the nerve, and fitted with circumferentially dispersed surface electrodes. Differential measurements of bulk potentials were filtered, amplified, and subsequently processed with the objective of identifying unique patterns of electrical activity within the ensheathed nerve bundle. The system was implemented using an in vivo preparation of lateral eye and optic nerve from Limulus polyphemus. Recorded signals were filtered using the discrete wavelet transform and the Daubechies 4 wavelet basis to isolate signal components regarded as significant to the optical pattern. The entropies of the filtered signals were computed and used to build training and testing patterns for a cascade correlation neural network. The values on the eight outputs of the neural network represented the probability of one or more of the eight locations on the lateral eye having been illuminated by the stimulus. From these outputs, an image of the optical stimulus pattern was rendered. In tests, the system displayed an accuracy of 100% in distinguishing stimulus from nonstimulus conditions, and up to 91% in identifying the location(s) illuminated by a given pattern of optical stimulation.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87224087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1136902
L. Shea, K. Whittlesey, T. Segura, J. Jang, Y. Yang
Tissue engineering approaches employ polymer scaffolds to supports, promote, and direct tissue formation by progenitor cells, which are either present in the surrounding tissue or transplanted with the polymer. We hypothesize that scaffolds capable of delivering tissue-inductive factors, or genes encoding for these factors, at the correct time and location, and in the appropriate concentration could enhance the effectiveness of current regenerative approaches. Scaffolds have been developed that provide a controlled, sustained delivery of protein and non-viral DNA. Polymeric scaffolds capable of sustained drug release can be fabricated by the assembly of drug-loaded microspheres and subsequent fusion of the microspheres using a gas foaming process. This process has been developed to regulate the amount released and the release rates for protein, naked DNA, and DNA complexed with cationic lipid and polymers. Alternatively, we have developed a controlled DNA delivery system based on the tethering of DNA complexes to a biomaterial surfaces. Complexes can be immobilized at high densities and cells cultured on the substrates can internalize and express the DNA. These systems for the controlled delivery of proteins, or DNA-encoding for these proteins, are versatile and can be readily applied to the regeneration of various tissues.
{"title":"Tissue engineering scaffolds for controlled protein and plasmid delivery","authors":"L. Shea, K. Whittlesey, T. Segura, J. Jang, Y. Yang","doi":"10.1109/IEMBS.2002.1136902","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1136902","url":null,"abstract":"Tissue engineering approaches employ polymer scaffolds to supports, promote, and direct tissue formation by progenitor cells, which are either present in the surrounding tissue or transplanted with the polymer. We hypothesize that scaffolds capable of delivering tissue-inductive factors, or genes encoding for these factors, at the correct time and location, and in the appropriate concentration could enhance the effectiveness of current regenerative approaches. Scaffolds have been developed that provide a controlled, sustained delivery of protein and non-viral DNA. Polymeric scaffolds capable of sustained drug release can be fabricated by the assembly of drug-loaded microspheres and subsequent fusion of the microspheres using a gas foaming process. This process has been developed to regulate the amount released and the release rates for protein, naked DNA, and DNA complexed with cationic lipid and polymers. Alternatively, we have developed a controlled DNA delivery system based on the tethering of DNA complexes to a biomaterial surfaces. Complexes can be immobilized at high densities and cells cultured on the substrates can internalize and express the DNA. These systems for the controlled delivery of proteins, or DNA-encoding for these proteins, are versatile and can be readily applied to the regeneration of various tissues.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82710009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1137001
J. Abulencia, R. Gaspard, John Quackenbush, K. Konstantopoulos
The behavior of the chondrocytic cell line T/C-28a2 under shear flow was examined using a 32,448 element microarray. A parallel plate flow chamber was used to generate a shear stress level of 20 dyn/cm/sup 2/ for 1.5 or 24 hours (h), after which gene regulation was measured. Microarray analysis revealed differentially regulated genes affecting proliferation/differentiation, extracellular matrix/cytoskeleton, and inflammation at both time points. A ribonuclease protection assay was performed on a subset of genes to confirm the data obtained from the microarray. However, the cyclooxygenase-2 (COX-2) gene, which plays a role in the prostaglandin production in inflamed tissues and the synovium of rheumatoid arthritis (RA) patients, was studied further. Western hybridization revealed that COX-2 protein is present at 24 h, but not at 6 or 12 h. Also, immunofluorescence microscopy shows that COX-2 protein localizes in the cytosol after 24 h of shear, and is not present after 1.5 h. By examining the overall gene expression profiles of chondrocytes under different conditions of dynamic fluid shear, new insights on the pathogenesis of cartilage related diseases such as rheumatoid arthritis might be generated.
{"title":"Microarray analysis of the chondrocytic cell line T/C-28a2 under dynamic fluid shear","authors":"J. Abulencia, R. Gaspard, John Quackenbush, K. Konstantopoulos","doi":"10.1109/IEMBS.2002.1137001","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1137001","url":null,"abstract":"The behavior of the chondrocytic cell line T/C-28a2 under shear flow was examined using a 32,448 element microarray. A parallel plate flow chamber was used to generate a shear stress level of 20 dyn/cm/sup 2/ for 1.5 or 24 hours (h), after which gene regulation was measured. Microarray analysis revealed differentially regulated genes affecting proliferation/differentiation, extracellular matrix/cytoskeleton, and inflammation at both time points. A ribonuclease protection assay was performed on a subset of genes to confirm the data obtained from the microarray. However, the cyclooxygenase-2 (COX-2) gene, which plays a role in the prostaglandin production in inflamed tissues and the synovium of rheumatoid arthritis (RA) patients, was studied further. Western hybridization revealed that COX-2 protein is present at 24 h, but not at 6 or 12 h. Also, immunofluorescence microscopy shows that COX-2 protein localizes in the cytosol after 24 h of shear, and is not present after 1.5 h. By examining the overall gene expression profiles of chondrocytes under different conditions of dynamic fluid shear, new insights on the pathogenesis of cartilage related diseases such as rheumatoid arthritis might be generated.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82504288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1106437
G.K. Rohde, V. Sidorov, A. Aldroubi, B. Dawant, Shien‐Fong Lin
Myocardial contraction causes motion artifact in cardiac optical recording. Mechanical and chemical methods have been used, both with significant limitations, to reduce motion artifact in optical mapping. We propose an image registration approach using mutual information between image frames to solve this problem. The algorithm was tested with optical mapping data from isolated, perfused rabbit hearts. Both affine and nonrigid registration methods reduced motion artifact as measured by a reduction in excessive positive and negative deflection in the optical potential traces after the registration process. Such an approach could be further developed for real-time, in vivo electrophysiological measurement.
{"title":"Correction of motion artifact in cardiac optical mapping using image registration technique","authors":"G.K. Rohde, V. Sidorov, A. Aldroubi, B. Dawant, Shien‐Fong Lin","doi":"10.1109/IEMBS.2002.1106437","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1106437","url":null,"abstract":"Myocardial contraction causes motion artifact in cardiac optical recording. Mechanical and chemical methods have been used, both with significant limitations, to reduce motion artifact in optical mapping. We propose an image registration approach using mutual information between image frames to solve this problem. The algorithm was tested with optical mapping data from isolated, perfused rabbit hearts. Both affine and nonrigid registration methods reduced motion artifact as measured by a reduction in excessive positive and negative deflection in the optical potential traces after the registration process. Such an approach could be further developed for real-time, in vivo electrophysiological measurement.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87838908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1053468
G. Birol, A. McKenna, H. Smith, T. Giorgio, S. Brophy
A team of domain experts, learning scientists, learning technologists, assessment experts and students are currently working on developing and refining educational tools for biotechnology as well as for other domains within the "How People Learn" framework in the NSF funded VaNTH ERC in Bioengineering Educational Technologies. Educational modules In biotechnology cover a collection of challenges designed around bioreactors, mass and momentum transfer issues, and microbial kinetics, which are among core biotechnology topics. The activities form the core of the STAR Legacy Cycle method that was adopted as the template for module development. These modules have been tested in classrooms both at Vanderbilt and Northwestern and detailed assessment data have also been collected. The focus of this contribution is on development and implementation of these educational modules at two universities (VU and NJU).
{"title":"Integration of the \"How people learn\" framework into educational module development and implementation in biotechnology","authors":"G. Birol, A. McKenna, H. Smith, T. Giorgio, S. Brophy","doi":"10.1109/IEMBS.2002.1053468","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1053468","url":null,"abstract":"A team of domain experts, learning scientists, learning technologists, assessment experts and students are currently working on developing and refining educational tools for biotechnology as well as for other domains within the \"How People Learn\" framework in the NSF funded VaNTH ERC in Bioengineering Educational Technologies. Educational modules In biotechnology cover a collection of challenges designed around bioreactors, mass and momentum transfer issues, and microbial kinetics, which are among core biotechnology topics. The activities form the core of the STAR Legacy Cycle method that was adopted as the template for module development. These modules have been tested in classrooms both at Vanderbilt and Northwestern and detailed assessment data have also been collected. The focus of this contribution is on development and implementation of these educational modules at two universities (VU and NJU).","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86521088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1053339
S. Gard, Regina J. Konz
Shock absorbing pylons (SAPs) are components that increase prosthetic compliance and provide shock absorption during walking, running, and other high-impact activities in persons with leg amputations. The purpose of this study was to investigate the effect of SAPs on the gaits of persons who walk with trans-tibial prostheses. Two gait analyses were performed on ten subjects walking with and without an Endolite TT (Telescopic-Torsion) Pylon. Comparison of kinematic and kinetic gait parameters indicated that there were few quantitative changes in the way people walked with and without the SAPs. The most consistent change among subjects was a reduction In the magnitude of an isolated force transient that occurred during the prosthetic loading response phase, an effect that was more evident at higher walking speeds. Results from a questionnaire that was administered to subjects indicated they generally preferred walking with the SAP for reasons related to comfort. We conclude that SAPs may provide significant benefit for persons with trans-tibial amputations who are able to routinely walk at speeds above approximately 1.3 m/sec.
{"title":"The effect of shock absorbing prosthetic components on the gaits of persons with lower-extremity amputations","authors":"S. Gard, Regina J. Konz","doi":"10.1109/IEMBS.2002.1053339","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1053339","url":null,"abstract":"Shock absorbing pylons (SAPs) are components that increase prosthetic compliance and provide shock absorption during walking, running, and other high-impact activities in persons with leg amputations. The purpose of this study was to investigate the effect of SAPs on the gaits of persons who walk with trans-tibial prostheses. Two gait analyses were performed on ten subjects walking with and without an Endolite TT (Telescopic-Torsion) Pylon. Comparison of kinematic and kinetic gait parameters indicated that there were few quantitative changes in the way people walked with and without the SAPs. The most consistent change among subjects was a reduction In the magnitude of an isolated force transient that occurred during the prosthetic loading response phase, an effect that was more evident at higher walking speeds. Results from a questionnaire that was administered to subjects indicated they generally preferred walking with the SAP for reasons related to comfort. We conclude that SAPs may provide significant benefit for persons with trans-tibial amputations who are able to routinely walk at speeds above approximately 1.3 m/sec.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76226286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1053408
A. Adami, K. Yang, X. Song, M. Pavel, D. Dirschl
We describe an approach toward improved classification of fractures in the vicinity of ankle joints using image-specific image enhancement and 3D modeling. The enhancement approach is based on the development of a set of linear features from X-ray images. The 3D models of fractures are used to determine the X-ray image representation from a fractured surface. These models are then used in reverse to find surface parameters that are most consistent with the 2D fracture representations.
{"title":"Model-based image processing and analysis for fracture classification","authors":"A. Adami, K. Yang, X. Song, M. Pavel, D. Dirschl","doi":"10.1109/IEMBS.2002.1053408","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1053408","url":null,"abstract":"We describe an approach toward improved classification of fractures in the vicinity of ankle joints using image-specific image enhancement and 3D modeling. The enhancement approach is based on the development of a set of linear features from X-ray images. The 3D models of fractures are used to determine the X-ray image representation from a fractured surface. These models are then used in reverse to find surface parameters that are most consistent with the 2D fracture representations.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79828744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-01DOI: 10.1109/IEMBS.2002.1136852
D. Tang, Chun Yang, S.Q. Liu
Fluid shear stress may play an important role in regulating cell activities and motility of growth factors in artery remodeling, atherosclerosis and re-stenosis process. 3-D computational models based on a multi-cell experimental model are introduced and solved to quantify shear stress distributions on cell surfaces under physiological setting. Combined with experimental data, relationship between fluid shear stress and endothelial cell activities can be established. Cell geometry and membrane mechanical properties affect micro flow environment leading to considerable changes in shear stress distributions and various cell activities such as cell migration and activation of cell migration signaling mechanisms.
{"title":"Shear stress distributions on the membrane of endothelial cells using 3-D computational modeling with fluid-structure interactions","authors":"D. Tang, Chun Yang, S.Q. Liu","doi":"10.1109/IEMBS.2002.1136852","DOIUrl":"https://doi.org/10.1109/IEMBS.2002.1136852","url":null,"abstract":"Fluid shear stress may play an important role in regulating cell activities and motility of growth factors in artery remodeling, atherosclerosis and re-stenosis process. 3-D computational models based on a multi-cell experimental model are introduced and solved to quantify shear stress distributions on cell surfaces under physiological setting. Combined with experimental data, relationship between fluid shear stress and endothelial cell activities can be established. Cell geometry and membrane mechanical properties affect micro flow environment leading to considerable changes in shear stress distributions and various cell activities such as cell migration and activation of cell migration signaling mechanisms.","PeriodicalId":60385,"journal":{"name":"中国地球物理学会年刊","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79454922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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