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Wyświetlanie 1-6 z 6
Tytuł:
Wpływ reaktywności jonowej biomateriałów na żywotność komórek in vitro
The effect of biomaterials ion reactivity on cell viability in vitro
Autorzy:
Przekora, A.
Kołodyńska, D.
Ginalska, G.
Ślósarczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/285341.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
reaktywność jonowa
kompozyt
cytotoksyczność
hodowla komórek
ion reactivity
composite
cytotoxicity
cell culture
Opis:
Powszechnie wiadomo, że reaktywne jonowo biomateriały indukują różne interakcje z otaczającym środowiskiem, powodując zmiany stężenia jonów, zwłaszcza kluczowych jonów takich jak wapń, magnez i fosfor, co może wpływać na metabolizm i żywotność komórek. Głównym składnikiem części mineralnej kości i zębów jest hydroksyapatyt (HAp) (Ca10(PO4)6(OH)2). W celu polepszenia własności mechanicznych oraz poręczności chirurgicznej hydroksyapatytu można połączyć go z dodatkowym komponentem organicznym np. polisacharydowym. W niniejszej pracy oznaczano reaktywność jonową oraz cytotoksyczność 2 typów kompozytów na bazie glukanu (kompozytu glukan-HAp i kompozytu glukan-C-HAp) oraz poszczególnych ich składników: wysokoporowatych granul hydroksyapatytu (HAp), wysokoporowatych granul HAp węglanowo-magnezowych (C-HAp) oraz glukanu. Reaktywność jonową testowanych materiałów oznaczono za pomocą absorpcyjnej spektrometrii atomowej (ASA). Badania in vitro przeprowadzono z zastosowaniem linii komórkowej hFOB 1.19 (ludzkie płodowe osteoblasty) oraz pierwotnej hodowli fibroblastów skóry (HSF). Cytotoksyczność ekstraktów z biomateriałów określono z użyciem 2 testów - MTT i NRU. Wyniki badań wyraźnie wskazały, że dodatek wysokoporowatych granul HAp i C-HAp do glukanu powoduje, że kompozyt jest reaktywny jonowo, co wpływa na metabolizm i żywotność hodowanych komórek.
It is widely known that surface-reactive biomaterials induce various interaction with surrounded environment, causing changes in the ion concentration, especially with respect to the crucial ions such as calcium, magnesium and phosphorous, what may significantly affect the cell metabolism and viability. Hydroxyapatite (HAp) (Ca10(PO4)6(OH)2) is the main inorganic component of bones and teeth. In order to improve mechanical properties and surgical handiness of hydroxyapatite, an organic component e.g. polysaccharide can be added. In this work, the ion reactivity and cytotoxicity of 2 types of glucan-based composites (composite glucan-HAp and composite glucan-C-HAp) were evaluated. Additionally, the ion reactivity and cytotoxicity of each component of the composites: highly porous hydro- xyapatite (HAp), highly porous carbonated-Mg-HAp (C-HAp) and glucan were evaluated. The ion reactivity of tested materials was assessed by atomic absorption spectrometry (AAS). In vitro tests were carried out using hFOB 1.19 cell line (human fetal osteoblast cells) and human skin fibroblast primary cell culture (HSF). The cytotoxicity of biomaterials extracts was estimated by 2 methods - MTT and NRU. Our studies clearly indicated that addition of highly porous HAp and C-HAp granules to the glucan, make the composite ion reactive, what affects the metabolism and viability of cultured cells.
Źródło:
Engineering of Biomaterials; 2012, 15, 114; 59-65
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tissue engineering of bone: the role of osteoblasts in osteogenesis and peri-implant bone healing
Autorzy:
Wróbel, E.
Witkowska-Zimny, M.
Powiązania:
https://bibliotekanauki.pl/articles/284980.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bone tissue engineering
osteoblasts
human bone-derived cells
peri-implant bone healing
osteogenesis
cell culture
Opis:
Osteoblasts are cells of mesenchymal origin, which rebuild resorbed bone by synthesizing bone matrix proteins and by inducing bone matrix mineralization. Osteoblasts play a crucial role in creating and maintenance of healthy bone architecture, bone repair, and peri-implant bone healing (osseointegration). These bone-forming cells are also involved in regulation of osteoclasts function, and hence bone resorption in osteoclastogenesis process. We have presented our own studies on the subsequent stages of differentiation of Human Bone-Derived Cells (HBDCs) that could be a good candidate as an autogenous source for reconstruction and rebuilding of own patient's bone using tissue engineering methods. In this review we discussed the biology of osteoblasts, compared with the HBDCs cultures, under the influence of growth factors (FGF-2, TGF-ß, IGF, PDGF) and hormones (PTH, 1,25-dihydroxyvitamin D3, leptin). Our review is also focused on the participation of intercellular adhesion proteins (cadherins, claudins, connexin, 'OsteoMacs'), transcription factors (Cbfal, Msx-2, Osx, ATF4), and others molecules (RANKL, OPG, BMP2, lactofferin, PPARY) in modulating osteoblasts functions on the basis of current reports, throwing new light on the involvement of osteoblasts during osteogenesis and peri-implant bone healing.
Źródło:
Engineering of Biomaterials; 2013, 16, 119; 2-7
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizing manufacturing conditions of polymer microspheres as cell carriers for modular tissue engineering
Autorzy:
Mielan, Bartosz
Pamuła, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/1844978.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
modular tissue engineering
microspheres
cell culture
oil-in-water emulsification
poly(L-lactide-co-glycolide) (PLGA)
Opis:
Microspheres (MS) made of biostable polymer, namely polystyrene, have been used as substrates for cell culture enabling rapid cell expansion in dynamic conditions. However, due to non-resorbability, polystyrene (PS) MS when repopulated with cells cannot be directly used in tissue engineering. Our concept was to produce MS from resorbable polymer – poly(L-lactide- -co-glycolide) (PLGA) as a support for adherent cells, e.g. osteoblasts. We hypothesize that such MS can be applied to the injured site to act as cell carriers or as modules for modular tissue engineering (MTE). In this article, we present the results of optimizing the PLGA MS manufacturing conditions via oil-in-water emulsification. Due to such a technique, MS with the required size, size distribution and properties suitable for cell culturing can be obtained. Three parameters of the oil-in-water emulsification were examined: the stirring speed of a water phase during MS manufacturing, the surfactant concentration, i.e. poly(vinyl alcohol) (PVA) in a water phase and concentration of PLGA in dichloromethane (DCM) as an oil phase. The results proved that the 7.5% PLGA concentration in DCM solution as an oil phase, the 0.5-2% concentration of PVA solution as a water phase and the stirring speed of water phase of 1000 rpm provided MS with the 160 μm mean diameter, which is suitable for cell culture. Moreover, the developed sieving and cleaning procedures were efficient to collect MS with the mean diameter of 280 μm, the more coherent size distribution and the ability to sink in the cell culture medium. The presence on the bottom of cell culture wells is crucial for MTE.
Źródło:
Engineering of Biomaterials; 2020, 23, 156; 2-9
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In situ-formed bacterial exopolysaccharide (EPS) as a potential carrier for anchorage-dependent cell cultures
Autorzy:
Komorowski, Piotr
Kołodziejczyk, Agnieszka
Makowski, Krzysztof
Kotarba, Sylwia
Walkowiak, Bogdan
Powiązania:
https://bibliotekanauki.pl/articles/1844871.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bacterial exopolysaccharides
dextran- -based “microcarriers”
scanning electron microscopy
atomic force microscopy
roughness parameters
three-dimensional cell culture
Opis:
The study involved the use of a bacterial strain isolated from environmental samples which produce the biopolymer in the form of pellets in the submerged culture. This material (bacterial exopolysaccharide) is produced by bacteria of the Komogateibacter xylinus which are prevalent in the environment. The aim of this study was to characterize bacterial exopolysaccharides and commercial dextran-based “microcarriers” in terms of their roughness and cell culture effects, including the morphology and viability of the human hybridoma vascular endothelial cell line EA.hy926. The pellets were characterized using scanning electron microscopy (SEM) and atomic for¬ce microscopy (AFM). The resulting structures were used for cell culture of adherent cells (anchorage¬-dependent cells). At the same time, the cultures with commercial, dextran-based “microcarriers” were carried out for comparative purposes. After com¬pletion of the cell culture (24 hours of culture), the cellulose and commercial “carriers” were analyzed using SEM and AFM. Finally, the obtained cell dens¬ities (fluorescence labelling) and their morphological characteristics (SEM) were compared. The obtained results strongly support the applicability of bacterial exopolysaccharide (EPS) in tissue engineering to build innovative 3D scaffolds for cell culture, the more so that it is technologically possible to produce EPS as spatially complex structure
Źródło:
Engineering of Biomaterials; 2021, 24, 159; 18-23
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Endothelial cells on pet vascular prostheses impregnated with polyester-based copolymers and coated with cell-adhesive protein assemblies
Autorzy:
Chlupac, J.
Filova, E.
Riedel, T.
Brynda, E.
Pamuła, E.
Lisa, V.
Bacakova, L.
Powiązania:
https://bibliotekanauki.pl/articles/284406.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
vascular prostheses
polyethylene terephtalate
poly(glycolide-L-lactide)
poly(glycolide-L-lactide-(ε)caprolactone)
extracellular matrix
surface modification
collagen
laminin
fibronectin
fibrin
endothelial cells
static cell culture
Opis:
Arterial bypass surgery with synthetic vascular prostheses achieves poor patency rates compared to autogenous natural materials, and this is a challenge for tissue engineering research concerning small caliber vascular grafts. Modifications of the prosthetic surface followed by endothelial cell seeding may reduce thrombogenicity and intimal hyperplasia. Planar polyethylene terephthalate (PET) vascular prosthetic samples were impregnated with the copolymer poly(glycolide-L-lactide) (PGL) or with the terpolymer poly(glycolide-L-lactide-(e)caprolactone) (PGLCap) in order to lower the permeability of the knitted fabrics and ensure a less adhesive background. Subsequent modification with adhesive protein assemblies composed of collagen type I (Co) in conjunction with laminin (LM), fibronectin (FN) or fibrin (Fb) gel was performed to enhance cell adhesion. Bovine pulmonary artery endothelial cells (EC) of the CPAE line were seeded on to the coatings and subjected to static tissue culture conditions for 7 days. Impregnation of the PET prostheses decreased the initial adhesion and proliferation of the EC. After coating with the protein assemblies, the impregnated PET provided better substrates for cell culture than the protein-coated PET, on which the EC population started decreasing after 4 days of culture. The cells proliferated better on the CoFN, CoFb and CoFbFN coatings than on the Co and CoLM coatings. Impregnation type and adhesive matrix protein deposition may play an important role in successful endothelialization, healing and clinical performance of vascular grafts.
Źródło:
Engineering of Biomaterials; 2008, 11, no. 81-84; 108-111
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth of animal cells on flexible interface of liquid fluorocarbon
Autorzy:
Pilarek, M.
Grabowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/283970.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
perfluorochemical (perfluorocarbon)
liquid/liquid culture system
flexible interfacial area
animal cell aggregates
Opis:
The aim of this work was to study BHK-21 fibroblasts cultured on the interfacial area of two immiscible liquids: perfluorodecalin (hydrophobic; PFD) and cell culture medium (aqueous; DMEM) what allows creating 3-D multicellular structures. We showed that the robust growth of 3-D aggregated animal cells could be achieved on flexible PFD/DMEM interfacial area. We also indicated that 3-D aggregates of BHK-21 cells could be successfully subcultured on solid hydrophobic surface and cells could migrate from those multicellular structures, spread on solid surface and further grow in typical monolayered form. Results of our experiments showed that the PFD/medium system is simple and ready-to-use method without need of any inserts traditionally used for 3-D cultures of animal cells. Formed multicellular 3-D aggregates could be directly used in the same culture system for inoculation of biomaterial elements or scaffolds.
Źródło:
Engineering of Biomaterials; 2012, 15, 114; 12-14
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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