Biomimetic Extracellular Matrices and Scaffolds Prepared from Cultured Cells

2018 ◽  
pp. 465-474 ◽  
Author(s):  
Guoping Chen ◽  
Naoki Kawazoe
Keyword(s):  
Cultured Cells ◽  
Extracellular Matrices

scholarly journals Tissue development-mimicking extracellular matrices from cultured cells

2016 ◽  
Vol 4 ◽  
Author(s):  
Chen Guoping ◽  
Cai Rong ◽  
Hoshiba Takashi ◽  
Kawazoe Naoki
Keyword(s):  
Cultured Cells ◽  
Extracellular Matrices ◽  
Tissue Development

Platelet Adhesion to Extracellular Matrices of Cultured Cells

1991 ◽  
Vol 614 (1) ◽  
pp. 181-192 ◽  
Author(s):  
JAN J. SIXMA ◽  
APOLLO PRONK ◽  
PATRICIA N. E. M. NIEVELSTEIN ◽  
JAAP-JAN ZWAGINGA ◽  
GEORG HINDRIKS ◽  
...  
Keyword(s):  
Platelet Adhesion ◽  
Cultured Cells ◽  
Extracellular Matrices

DIPYRIDAMOLE INDUCES CHANGES IN THE THROMBOGENIC PROPIERTIES OF ENDOTHELIAL CELL EXTRACELLULAR MATRICES

1987 ◽  
Author(s):  
J Aznar-Salatti ◽  
G Escolar ◽  
L Almirall ◽  
A Ordinas ◽  
E Bastida
Keyword(s):  
Cultured Cells ◽  
Platelet Reactivity ◽  
Extracellular Matrices ◽  
Flow Conditions ◽  
Cross Sectional ◽  
Shear Rates ◽  
Platelet Deposition ◽  
Platelet Aggregate ◽  
Morphometric Evaluation ◽  
Membrane Reactivity

Dipyridamole (DIP) is a pirydo-pirymidine drug widely used as an antiplatelet agent.DIP has also been demonstrated to have effects on various cultured cells. We studied platelet reactivity of extracellular matrices (ECMs) produced by untreated (ECM-c) and DIP-treated (ECM-DIP) endothelial cells (ECs).Confluent monolayers of EC were incubated in buffer containing 0 or 10 pM. DIP for 48 h. The ECMs were prepared by removing the EC with 2% EGTA (1 h at 37°C). Platelet deposition onto the ECMs was measured under flow conditions using a flat chamber perfusion model ECM-c and ECM-DIP were exposed for 5 min to whole blood at shear rates of 300 or 1300 sec~1.Then, the perfused ECMs were processed for cross sectional morphometric evaluation using a computer system. The platelet, deposition is expressed as total surface covered with platelets (mean±SEM ) and shown in the table.Platelet aggregate formation on ECM-DIP at 1300 sec-1 was also reduced(by 25%)as measured morphometrically. We conclude that DIP-treatment of EC results in ECM modifications,which in turn decrease ECM-platelet interactions.These data also suggest that pharmacological treatment of the endothelium influences basement membrane reactivity.

Ultrastructural Correlations between Clonal Human Tumor Colonies and in Vivo Neoplasms

1982 ◽  
Vol 40 ◽  
pp. 210-211
Author(s):  
M.J. Murphy ◽  
R.R. Price ◽  
J.C. Sloman
Keyword(s):  
Cultured Cells ◽  
Human Tumor ◽  
Cell Type ◽  
Tumor Mass ◽  
Initial Cell ◽  
Cloning Assay ◽  
Human Tumor Cloning ◽  
The Relationship

The in vitro human tumor cloning assay originally described by Salmon and Hamburger has been applied recently to the investigation of differential anti-tumor drug sensitivities over a broad range of human neoplasms. A major problem in the acceptance of this technique has been the question of the relationship between the cultured cells and the original patient tumor, i.e., whether the colonies that develop derive from the neoplasm or from some other cell type within the initial cell population. A study of the ultrastructural morphology of the cultured cells vs. patient tumor has therefore been undertaken to resolve this question. Direct correlation was assured by division of a common tumor mass at surgical resection, one biopsy being fixed for TEM studies, the second being rapidly transported to the laboratory for culture.

Electron Probe Microanalysis of Frozen Hydrated Kidneys, Isolated Cells, and Cultured Cells

1982 ◽  
Vol 40 ◽  
pp. 402-403 ◽  
Author(s):  
Claude Lechene
Keyword(s):  
Liquid Nitrogen ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Cultured Cells ◽  
Liquid Nitrogen Temperature ◽  
Elemental Content ◽  
Isolated Cells ◽  
Renal Tubular Cells ◽  
Diamond Saw ◽  
Saw Blade

Electron probe microanalysis of frozen hydrated kidneysThe goal of the method is to measure on the same preparation the chemical elemental content of the renal luminal tubular fluid and of the surrounding renal tubular cells. The following method has been developed. Rat kidneys are quenched in solid nitrogen. They are trimmed under liquid nitrogen and mounted in a copper holder using a conductive medium. Under liquid nitrogen, a flat surface is exposed by sawing with a diamond saw blade at constant speed and constant pressure using a custom-built cryosaw. Transfer into the electron probe column (Cameca, MBX) is made using a simple transfer device maintaining the sample under liquid nitrogen in an interlock chamber mounted on the electron probe column. After the liquid nitrogen is evaporated by creating a vacuum, the sample is pushed into the special stage of the instrument. The sample is maintained at close to liquid nitrogen temperature by circulation of liquid nitrogen in the special stage.

The Infection of Cells by Bullet-Shaped Viruses

1969 ◽  
Vol 27 ◽  
pp. 372-373
Author(s):  
Frederick A. Murphy ◽  
Alyne K. Harrison ◽  
Sylvia G. Whitfield
Keyword(s):  
Electron Microscopy ◽  
Physical Properties ◽  
Host Cell ◽  
Thin Section ◽  
Cultured Cells ◽  
Cell Infection ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Section Electron Microscopy

The bullet-shaped viruses are currently classified together on the basis of similarities in virion morphology and physical properties. Biologically and ecologically the member viruses are extremely diverse. In searching for further bases for making comparisons of these agents, the nature of host cell infection, both in vivo and in cultured cells, has been explored by thin-section electron microscopy.

Ultrastructure of two neoplasms in culture compared with original biopsies

1984 ◽  
Vol 42 ◽  
pp. 50-51
Author(s):  
Joseph M. Harb ◽  
James T. Casper ◽  
Vlcki Piaskowski
Keyword(s):  
Electron Microscopy ◽  
Tissue Culture ◽  
Biopsy Specimen ◽  
Cultured Cells ◽  
Light And Electron Microscopy ◽  
Human Tumor ◽  
Soft Agar ◽  
Human Tumor Cells ◽  
Morphological Distinction ◽  
Tumor Types

The application of tissue culture and the newer methodologies of direct cloning and colony formation of human tumor cells in soft agar hold promise as valuable modalities for a variety of diagnostic studies, which include morphological distinction between tumor types by electron microscopy (EM). We present here two cases in which cells in culture expressed distinct morphological features not apparent in the original biopsy specimen. Evaluation of the original biopsies by light and electron microscopy indicated both neoplasms to be undifferentiated sarcomas. Colonies of cells propagated in soft agar displayed features of rhabdomyoblasts in one case, and cultured cells of the second biopsy expressed features of Ewing's sarcoma.

Uultrastructure of Microtubules

1972 ◽  
Vol 30 ◽  
pp. 252-253
Author(s):  
Ariaki Nagayama
Keyword(s):  
Fine Structure ◽  
Cultured Cells ◽  
Present Report ◽  
Confluent Monolayer ◽  
Purification Method ◽  
Vinca Rosea ◽  
L Cells ◽  
Antimitotic Activity ◽  
Monolayer Cultures ◽  
Rapid Purification

Vinblastine(Vb) or vincristine, alkaloid derived from Vinca rosea is known for its antimitotic activity by regrouping of microtubules into paracrystalline form within the cells. A rapid purification method of vinblastine-induced microtubular paracrystals(PC) has provided us with a fresh and pure microtubular material demonstrating the presence of a labile ATPase associated with the PC. The present report is concerned with the fine structure of purified microtubules of mammalian cultured cells.Confluent monolayer cultures of L cells were incubated for 20hrs with 10-5 M Vb (donated from Shionogi Seiyaku & Co., Osaka, Japan).

DNA nick end labeling: a reliable marker for apoptosis?

1995 ◽  
Vol 53 ◽  
pp. 962-963
Author(s):  
Anne F. Bushnell ◽  
Sarah Webster ◽  
Lynn S. Perlmutter
Keyword(s):  
Cell Death ◽  
Cultured Cells ◽  
Apoptotic Cell ◽  
Morphological Characteristics ◽  
Detection Methods ◽  
Tissue Preparation ◽  
Preparation Methods ◽  
Dna Laddering ◽  
Disease States ◽  
Reliable Marker

Apoptosis, or programmed cell death, is an important mechanism in development and in diverse disease states. The morphological characteristics of apoptosis were first identified using the electron microscope. Since then, DNA laddering on agarose gels was found to correlate well with apoptotic cell death in cultured cells of dissimilar origins. Recently numerous DNA nick end labeling methods have been developed in an attempt to visualize, at the light microscopic level, the apoptotic cells responsible for DNA laddering.The present studies were designed to compare various tissue processing techniques and staining methods to assess the occurrence of apoptosis in post mortem tissue from Alzheimer's diseased (AD) and control human brains by DNA nick end labeling methods. Three tissue preparation methods and two commercial DNA nick end labeling kits were evaluated: the Apoptag kit from Oncor and the Biotin-21 dUTP 3' end labeling kit from Clontech. The detection methods of the two kits differed in that the Oncor kit used digoxigenin dUTP and anti-digoxigenin-peroxidase and the Clontech used biotinylated dUTP and avidinperoxidase. Both used 3-3' diaminobenzidine (DAB) for final color development.

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