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Wyszukujesz frazę "fibroblasts" wg kryterium: Temat


Tytuł:
Fibroblast biological activity on poly(l-lactide) and poly(l-lactide-co-trimethylene carbonate)
Autorzy:
Ścisłowska-Czarnecka, A.
Pamuła, E.
Kołaczkowska, E.
Tematy:
fibroblasts
biomaterials
PLLA
Pokaż więcej
Data publikacji:
2011
Powiązania:
https://bibliotekanauki.pl/articles/284073.pdf  Link otwiera się w nowym oknie
Źródło:
Engineering of Biomaterials; 2011, 14, 102; 7-10
1429-7248
Pojawia się w:
Engineering of Biomaterials
Opis:
Poly-L-lactide (PLLA) is acknowledged biocompatible polyester. However, it possesses high crystallinity/brittleness/stiffness and requires long time for complete degradation. In the current study we present data on PLTMC, a copolymer of L-lactide and trimethylene carbonate (TMC). Poly(trimethylene carbonate) (PTMC) is characterised by good mechanical properties and rapid degradation rate and for this it might possess new desired features for medical applications. During the experiments, adhesion and activity of fibroblasts cultured on PLLA and PLTMC were studied and compared during two time points of 3 and 5 days. On day 3, the number of adherent fibroblasts was compromised when fibroblasts were cultured in the presence of PLTMC but the proper adherence was recovered by day 5. The same pat-tern was observed when we evaluated some activity parameters of fibroblasts. In particular, the release of proteins and nitric oxide was studied as the increased levels of the mediators might indicate unwanted inflammatory-like condition. Overall, the results suggest that the synthesized PLTMC initially shows unwanted effects on fibroblasts but with the time these effects are abolished. Therefore PLTMC seems to represent a new material that is non-cytotoxic and compatible with the living cells.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymer carriers modified by plasma and functionalized with Au nanoparticles as substrates for mouse 3T3 fibroblasts
Autorzy:
Bacakova, M.
Makajova, Z.
Slepickova-Kasalkova, N.
Svorcik, V.
Bacakova, L.
Tematy:
polymers
nanoparticles
fibroblasts
Pokaż więcej
Data publikacji:
2011
Powiązania:
https://bibliotekanauki.pl/articles/284032.pdf  Link otwiera się w nowym oknie
Źródło:
Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 5
1429-7248
Pojawia się w:
Engineering of Biomaterials
Opis:
Polymers have been o f ten applied in biology and medicine for construction of tissue replacements. However, the inert surface o f the most polymers is not able to support and control cell adhesion, migration, proliferation, differentiation and other cell functions. Hence, the modification of polymer surface led to achieve appropriate properties. The polymer surface can be modified by plasma discharge by which the polymer surface chemistry and morphology is changed. Plasma treatment leads to creation of radicals, unsaturated bonds and new chemical groups, mainly oxygen containing groups. Oxidized groups increase the wettability of polymers, which supports adsorption of cell adhesion-mediating extracellular matrix (ECM) molecules in appropriate spatial conformation increasing accessibility of specific sites in these molecules by cell adhesion receptors. In addition, other surface properties of polymers are altered by plasma etching which strongly influence cell-material interaction. Radicals and unsaturated chemical bonds which are created by plasma can be utilized for grafting new chemical groups, biomolecules and nanoparticles. The biomolecules grafted on the polymer surface, such as amino acids, RGD-containing oligopeptides (i.e., ligands for integrin receptors), ECM molecules, enazymes, hormones, and also carbon and gold nanoparticles, not only have specific biological effects on cells but also change physical and chemical properties of the polymer surface, and by this way they support its bioactivity. This study is focused on physiochemical properties and biocompatibility of modified polymers. The studied materials were poly(L-lactide) (PLLA) foils, nanofibrous PLLA meshes and polyethylene terephtalate (PTFE) foils. PLLA and PTFE foils were modified in plasma with Ar + ions for time intervals of 50, 10 0 and 300 s with power 8 W, and then grafted with Au nanoparticles. Changes in the surface wettability were determined by reflection goniometry . The presence an d concentration o f Au nanoparticles were examine d by X-ray Photoelectron Spectroscopy (XPS). For the biocompatibility testing, the polymers were seeded by mouse embryonic fibroblasts of the line 3T3, i.e., t he cells of ten utilized as a feeder for keratinocytes. The cell adhesion and growth was evaluated by the number of cells, their morphology and the size of cell adhesion area in the 1st, 3rd and 6th day after seeding. The results indicate that the water drop contact angle increases with the time of exposure to plasma, which means that the vettability decreases. However, the following exposure of plasma-irradiated polymers to a sodium citrate solution (i.e., a storage solution for Au nanoparticles) and grafting with Au nanoparticles decrease the contact angle, i.e., increase the material surface wettability. Our tests of biocompatibility indicate that the modification of the polymer surface in fluences positively the cell behavior. The cells adhered at higher numbers and by a larger cell adhesion area on modified polymers; it was mainly manifested on PTFE.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of selected flavonoids on glycosaminoglycans in human skin fibroblasts
Autorzy:
Wosek, J.
Kuźmicz, I.
Wiśniewska, R.
Nazaruk, J.
Galicka, A.
Tematy:
Fibroblasts
glycosaminoglycans
flavonoids
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Data publikacji:
2016
Powiązania:
https://bibliotekanauki.pl/articles/1918304.pdf  Link otwiera się w nowym oknie
Źródło:
Progress in Health Sciences; 2016, 6(2); 59-63
2083-1617
Pojawia się w:
Progress in Health Sciences
Opis:
Purpose: Glycosaminoglycans (GAGs) and proteoglycans (PG) in addition to collagen are the main components of extracellular matrix (ECM). They play an important role in intercellular communication and interactions between cells and ECM. The biological changes in ECM that occur during aging are induced by decrease in GAG biosynthesis. The purpose of this study was to evaluate the effect of selected flavonoids isolated from Cirsium palustre (L.) Scop. on GAG content in human skin fibroblasts. Materials and methods: Human skin fibroblasts were treated with eriodictyol 7-O-glucoside (C1), 6-hydroxyluteolin 7-O-glucoside (C2), scutellarein 7-O-glucoside (C3) and pedalitin (C4) at 1, 20 and 40 μM for 24 h. Concentration of GAGs in the medium was assayed using method based on their ability to bind the cationic dye 1,9- dimethylmethylene blue (DMMB). Results: C1, C2 and C4 at concentration of 20 and 40 µM significantly increased content of sulphated GAGs in the medium. In contrast, treatment of cells with compound C3 did not have a statistically significant impact on GAG level. Ascorbic acid used as a positive control at 50 µM showed no effect on GAG concentration and increased their content at 100 µM but to a much lower extent than flavonoids. Conclusion: Flavonoids C1, C2 and C4 showed greater than ascorbic acid stimulatory impact on GAGs in healthy human skin fibroblasts, demonstrating their therapeutic potential in the aging.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of luteolin on expression of epithelial MUC1 mucin in human skin fibroblasts
Autorzy:
Wosek, J.
Radziejewska, I.
Andrulewicz, E.
Tematy:
fibroblasts
luteolin
MUC1
Pokaż więcej
Data publikacji:
2016
Powiązania:
https://bibliotekanauki.pl/articles/1918385.pdf  Link otwiera się w nowym oknie
Źródło:
Progress in Health Sciences; 2016, 6(2); 64-69
2083-1617
Pojawia się w:
Progress in Health Sciences
Opis:
Purpose: The membrane-anchored MUC1 mucin is typically expressed on normal and cancerous epithelial cells. Non-epithelial localization of this mucin is rare. However, the presence of MUC1 in human skin fibroblasts has been recently unexpectedly revealed. The aim of the study was to prove the expression of MUC1 mucin in human skin fibroblasts and the examine of the influence of luteolin on its expression. Materials and methods: ELISA tests and real-time PCR analysis were used to assess the expression of MUC1 mucin in fibroblast cells cocultured with 30 μM concentration of luteolin. Results: The expression of MUC1 was revealed in human skin fibroblasts. Luteolin decreased the relative level of mucin in cell lysates and media. Statistically significant decreased expression of MUC1 gene after luteolin treatment of fibroblasts cells was also revealed. Conclusion: Our results prove non-epithelial localization of MUC1 mucin. Luteolin inhibits the expression of MUC1 mucin in healthy human skin fibroblasts.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of fibrin-nanocoating of nanofibrous polymer membranes on the adhesion and proliferation of human dermal fibroblasts
Autorzy:
Pajorova, J.
Bacakova, M.
Musilkova, J.
Stranska, D.
Riedel, T.
Bacakova, L.
Tematy:
scaffolds
polymer membranes
fibroblasts
Pokaż więcej
Data publikacji:
2016
Powiązania:
https://bibliotekanauki.pl/articles/284422.pdf  Link otwiera się w nowym oknie
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 48
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dried human skin fibroblasts as a new substratum for functional culture of hepatic cells
Autorzy:
Wencel, Agnieszka
Zakrzewska, Karolina
Samluk, Anna
Noszczyk, Bartłomiej
Pijanowska, Dorota
Pluta, Krzysztof
Tematy:
cocultures
culture substratum
dried fibroblasts
human skin fibroblasts
C3A cells
Pokaż więcej
Data publikacji:
2017
Powiązania:
https://bibliotekanauki.pl/articles/1038663.pdf  Link otwiera się w nowym oknie
Źródło:
Acta Biochimica Polonica; 2017, 64, 2; 357-363
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Opis:
The primary hepatocytes culture is still one of the main challenges in toxicology studies in the drug discovery process, development of in vitro models to study liver function, and cell-based therapies. Isolated hepatocytes display a rapid decline in viability and liver-specific functions including albumin production, conversion of ammonia to urea, and activity of the drug metabolizing enzymes. A number of methods have been developed in order to maintain hepatocytes in their highly differentiated state in vitro. Optimization of culture conditions includes a variety of media formulations and supplements, growth surface coating with the components of extracellular matrix or with synthetic polymers, three-dimensional growth scaffolds and decellularized tissues, and coculture with other cell types required for the normal cell-cell interactions. Here we propose a new substratum for hepatic cells made by drying confluent human skin fibroblasts' culture. This growth surface coating, prepared using maximally simplified procedure, combines the advantages of the use of extracellular matrices and growth factors/cytokines secreted by the feeder layer cells. In comparison to the hepatoma cells grown on a regular tissue culture plastic, cells cultured on the dried fibroblasts were able to synthesize albumin in larger quantities and to form greater number of apical vacuoles. Unlike the coculture with the living feeder layer cells, the number of cells grown on the new substratum was not reduced after fourteen days of culture. This fact could make the dried fibroblasts coating an ideal candidate for the substrate for non-dividing human hepatocytes.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of fractionated radiation on proliferation, cell cycle and apoptosis of normal human dermal fibroblasts
Autorzy:
Adamczyk, A.
Gasińska, A.
Tematy:
fibroblasts
fractionated irradiation
proliferation
radiosensitivity
Pokaż więcej
Data publikacji:
2005
Powiązania:
https://bibliotekanauki.pl/articles/147800.pdf  Link otwiera się w nowym oknie
Źródło:
Nukleonika; 2005, 50,suppl.2; 9-12
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Opis:
The aim of the study was to investigate the changes in proliferation rate, cell cycle and apoptosis of normal skin fibroblasts during fractionated irradiation with a fraction dose of 2 Gy. Fibroblasts were irradiated 5 days per week for 12 days using gamma irradiation. Twenty four hours after each fraction, and for three days after finishing experiment the cells were harvested, fixed, and BrdUrd labelling index (BrdUrdLI), cell cycle and level of apoptosis and debris were assessed. It was found that fractionated irradiation caused disturbances in the proliferation rate and the cell cycle. Irradiation caused also constant, statistically significant increase in the number of G2M cells and level of apoptosis and debris, which was observed even during 3 days after irradiation. Data indicate non equal biological effect of each fraction dose. Block at G2/M phase suggests accumulation of sublethal damage and increased radiosensitivity, which was manifested by elevated level of cell death (apoptosis and debris).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a new production method of foam-like wound dressings for skin regeneration
Autorzy:
Vivcharenko, Vladyslav
Kazimierczak, Paulina
Wójcik, Michał
Przekora, Agata
Tematy:
chitosan
agarose
biomaterials
fibroblasts
cytotoxicity
Pokaż więcej
Data publikacji:
2019
Powiązania:
https://bibliotekanauki.pl/articles/284152.pdf  Link otwiera się w nowym oknie
Źródło:
Engineering of Biomaterials; 2019, 22, 152; 16-20
1429-7248
Pojawia się w:
Engineering of Biomaterials
Opis:
Chitosan is widely used to prepare films, hydro-gels, cryogels, sponges, fibers and other various biomaterials used in the tissue engineering field. It is one of the best processable polysaccharides used in biomedicine. However, its stability is generally lower as compared with others, due to its pH sensitivity and hydrophilic character. Using chitosan in combination with agarose may not only improve chemical and mechanical properties of the resultant material (by the formation of a biocomposite), but also lead to the formation of a gel imitating physical attributes of the extracellular matrix. Moreover, the combination of these two polysaccharides has a promising ability to improve the stability of chitosan and to increase fibroblasts’ affinity to agarose. Characteristic advan-tageous features of these natural polymers raise a wide interest in tissue engineering. The aim of this study was to develop and optimize a new method to produce a highly biocompatible foam-like chitosan/agarose wound dressing for skin healing applications. The production process optimization helped to obtain the absorbent foam-like biomaterial which is non-toxic to skin fibroblasts and does not conduce their adhesion. Employing sodium bicarbonate as the main agent in the foaming reaction not only led to obtaining the foam-like structure but also neutralized the acidic pH, making the material non-toxic and non-irritating to the skin. In conclusion, the new foam-like biomaterial has great potential for biomedical applications as the wound dressing accelerating the healing process of the damaged tissues.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ethanol influence on gingival fibroblasts - a real-time in vitro study
Autorzy:
Wyganowska-Świątkowska, M.
Nowak, A.
Paszyńska, E.
Grzech-Leśniak, K.
Tematy:
alcohol
oral cavity
gingival fibroblasts
Pokaż więcej
Data publikacji:
2018
Powiązania:
https://bibliotekanauki.pl/articles/2081937.pdf  Link otwiera się w nowym oknie
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 4; 647-650
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Opis:
Introduction. Alcohol consumption is the world’s third largest risk factor for disease and disability. According to the WHO report from 2011: 71% of urban respondents ty and 77% of rural respondents admit to alcohol consumption]. Lower socio-economic status and educational levels result in a greater risk of alcohol-related injury, disease and death. Alcohol is a common component of many medicines, as well as an ingredient in many oral hygiene home products. Mouthwashes containing alcohol are considered to inhibit wound healing in the oral cavity. Due to the fact that many different results are described for different concentrations of alcohol at different times, an attemptwas made to visualise the direct impact of 7.2% and 22% alcohol on human gingival fibroblasts. Materials and method. PANsystem 2000 was used for visualisation of the reaction of human gingival fibroblasts isolated from gingiva on ethanol in 2 different concentrations. PANsys 3000 is a multi-system fully-automated cell culture device used for in vitro culture and to study a variety of cell lines under conditions similar to in vivo. Observations were carried out for 48 hours since alcohol addition. Pictures were taken in a continuous process at 5 minute intervalds and combined into a film. Results. Both contamination of 7.2% and 22% ethyl alcohol negatively affected morphology and cell proliferation. Addition of ethanol at a concentration 7.2% enabled cells to regain their ability to divide and recover normal morphology after 10 hours; changes caused by 22% ethanol, however, were irreversible. Conclusions. The obtained results suggest that daily usage of 7.2% alcohol contained in mouthwashes is non-toxic for gingival fibroblasts, and could be recommended after periodontal surgery.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical properties and cytotoxicity of hydrogels based on Beetosan® containing sage and bee pollen
Autorzy:
Tyliszczak, Bożena
Drabczyk, Anna
Kudłacik-Kramarczyk, Sonia
Grabowska, Beata
Kędzierska, Magdalena
Tematy:
hydrogels
cytotoxicity
fibroblasts
chitosan
sage
wettability
Pokaż więcej
Data publikacji:
2017
Powiązania:
https://bibliotekanauki.pl/articles/1038565.pdf  Link otwiera się w nowym oknie
Źródło:
Acta Biochimica Polonica; 2017, 64, 4; 709-712
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Opis:
Currently, increasing attention is being paid to issues related to environmental protection, waste management, as well as to the development of polymers with useful properties. The research presented here involved preparation of hydrogels based on Beetosan® - a chitosan derived from the multi-stage processing of dead bees. Moreover, hydrogels were additionally modified with natural substances - i.e. bee pollen and extract of Salvia officinalis (sage) that are well known for the presence of many compounds with beneficial properties from a medical point of view. Materials have been first obtained by photopolymerization. Then, their surface morphology, wettability and cytotoxicity to selected cell lines have been determined. It can be stated that such combination of Beetosan® hydrogel matrix and the mentioned additives resulted in a preparation of polymers characterized by negative impact on cancer cells. Impact of hydrogels with sage is slightly more intense due to the presence of substances such as ursalic or rosmaric acid that are characterized to have anticancer activity. Such negative impact has not been observed in case of studies using fibroblasts. Furthermore, addition of natural substances into hydrogels resulted in a more homogeneous surface and in the decrease of wettability angle of the tested polymers. It can be concluded that the use of natural-derived reagents and synthesis of polymers using these reagents (as a result of environmentally friendly photopolymerization) yields materials with interesting properties for medical purposes, with particular emphasis on antitumor activity, and without significant negative impact on fibroblasts.
Dostawca treści:
Biblioteka Nauki
Artykuł

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