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Страница 1 от 20 полученные результаты
Spontaneous evolution of cytoplasmic lectin binding and nuclear size and deoxyribonucleic acid content in human colorectal cancers grafted onto nude mice.
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BACKGROUND
The development of certain biologic characteristics in human colorectal tumor xenografted onto nude mice are described with respect to their precocious passages, i.e., passaging below 10 onto athymic mice.
METHODS
The biologic characteristic monitoring involved the determination of
Bandeiraea simplicifolia lectin I and Vicia villosa agglutinin bind specifically to the vomeronasal axons in the accessory olfactory bulb of the rat.
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The binding of 21 lectins to the accessory olfactory bulb (AOB) of the rat was examined by histochemistry. Two lectins [Bandeiraea simplicifolia lectin I (BSL-I) and Vicia villosa agglutinin (VVA)] bound specifically to the vomeronasal (VN) axons in the AOB. Seven lectins (Datura stramonium lectin,
Changes in motility of the rhizobacterium Azospirillum brasilense in the presence of plant lectins.
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The plant-beneficial bacterium Azospirillum brasilense can swim in liquids and swarm or migrate with the formation of microcolonies in soft media. To get closer to understanding the influence of natural environments on A. brasilense motility, we studied the individual and social movement of the
Pneumocystis carinii: surface reactive carbohydrates detected by lectin probes.
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Pneumocystis carinii obtained from rat lungs (RLH) and in vitro culture (RTC) were reacted with a panel of 14 fluorescein isothiocyanate conjugated lectins. Percentage fluorescence and fluorescent intensity were determined for both trophic and cyst forms. All RLH and RTC derived organisms bound
Distribution of saccharides in pig lymph-node high-endothelial venules and associated lymphocytes visualized using fluorescent lectins and confocal microscopy.
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The distribution of saccharides in pig lymph nodes, particularly on high-endothelial venule (HEV) endothelium and on lymphocytes in these vessels, was studied by examining the binding of fluorescent conjugates of 18 different lectins. Eight of the lectins, particularly with glycan specificity
Lectin histochemistry of papillary and follicular carcinoma of the thyroid gland.
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The lectin-binding properties of human follicular and papillary carcinoma were studied histochemically and compared with lectin binding to normal or goitrous thyroid tissue. Well-differentiated minimally invasive follicular carcinoma showed a lectin-binding pattern essentially identical to those of
Identification of perivitelline N-linked glycans as mediators of sperm-egg interaction in chickens.
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This study demonstrates that carbohydrates play an essential role in sperm-egg interactions in birds. Sperm-egg interaction was measured in vitro as the ability of spermatozoa to hydrolyse a small hole in the inner perivitelline layer, the equivalent of the mammalian zona pellucida. Preincubation
Differentiation of Helicobacter pylori isolates based on lectin binding of cell extracts in an agglutination assay.
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Plant and animal lectins with various carbohydrate specificities were used to type 35 Irish clinical isolates of Helicobacter pylori and the type strain NCTC 11637 in a microtiter plate assay. Initially, a panel of eight lectins with the indicated primary specificities were used: Anguilla anguilla
Lectins as probes to Pneumocystis carinii surface glycocomplexes.
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The binding characteristics of a panel of commercially available FITC-conjugated lectins to Pneumocystis carinii (Pc) were assessed by fluorescence microscopy and flow cytometry. Rat Pc obtained from infected lung homogenates were incubated with FITC-conjugated lectins in a series of concentrations,
The interaction between wheat germ agglutinin and other plant lectins with prostate cancer cells Du-145.
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The bioadhesive properties of fluorescein-labeled plant lectins with different carbohydrate specificities were investigated by flow cytometry at 4 and 37 degrees C using Du-145 prostate cancer cells. At both temperatures the lectin association rate increased following the order: Dolichos biflorus
Lectin characterization of gonococci from an outbreak caused by penicillin-resistant Neisseria gonorrhoeae.
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A total of 40 Neisseria gonorrhoeae isolates, representing 19 penicillin-resistant isolates (from 8 heterosexual patients and 11 homosexual patients) and 21 penicillin-susceptible isolates (from 15 heterosexual patients and 6 homosexual patients) and obtained from the same geographic area, were
Lectins as endocytic ligands: an assessment of lectin binding and uptake to rabbit conjunctival epithelial cells.
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OBJECTIVE
To investigate the binding and uptake pattern of three plant lectins in rabbit conjunctival epithelial cells (RCECs) with respect to their potential for enhancing cellular macromolecular uptake.
METHODS
Three fluorescein-labeled plant lectins (Lycoperison esculentum, TL; Solanum tuberosum,
Flow cytometric analyses of lectin binding to Pneumocystis carinii surface carbohydrates.
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Pneumocystis carinii obtained from infected rat lung homogenates was incubated with fluorescein isothiocyanate-conjugated lectins, counterstained with the nuclear stain, propidium iodide (PI), and analyzed by dual parameter histograms for lectin-associated green and PI-associated red fluorescence
Lectin-mediated bioadhesion: binding characteristics of plant lectins on the enterocyte-like cell lines Caco-2, HT-29 and HCT-8.
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In order to take advantage of the biorecognition between lectins and specific carbohydrates for targeted drug delivery, fluorescein-labelled lectins of different carbohydrate specificities were screened for binding to human colorectal carcinoma cell lines by flow cytometry and confocal microscopy.
Glycoconjugates of the human trabecular meshwork: a lectin histochemical study.
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Twelve specimens of resin-embedded human trabecular meshwork were probed with a panel of 21 biotinylated lectins, using an avidin-biotin peroxidase revealing system, in order to determine the normal pattern of saccharide expression in this tissue. High-mannose, intermediate and hybrid N-linked
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