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Wyszukujesz frazę "transfection" wg kryterium: Temat


Tytuł:
New cationic polyprenyl derivative proposed as a lipofecting agent
Autorzy:
Madeja, Zbigniew
Rak, Monika
Wybieralska, Ewa
Różański, Igor
Masnyk, Marek
Chmielewski, Marek
Łysek, Robert
Chojnacki, Tadeusz
Jankowski, Wiesław
Ciepichal, Ewa
Swiezewska, Ewa
Tekle, Michael
Dallner, Gustav
Tematy:
lipofection
transfection
GFP
cationic polyprenyl
Pokaż więcej
Wydawca:
Polskie Towarzystwo Biochemiczne
Powiązania:
https://bibliotekanauki.pl/articles/1040890.pdf  Link otwiera się w nowym oknie
Opis:
Cationic linear poly-cis-isoprenoid prepared from natural plant polyprenol in a mixture with dioleyl phosphatidylethanolamine was found to be an effective lipofection agent for eukaryotic cells. The transfecting activity is related to the poly-cis structure of the polyprenyl chain.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electroporated intact BY-2 tobacco culture cells as a model of transient expression study.
Autorzy:
Kościańska, Edyta
Wypijewski, Krzysztof
Tematy:
transfection
square-wave electroporator
BY-2 cells
Pokaż więcej
Wydawca:
Polskie Towarzystwo Biochemiczne
Powiązania:
https://bibliotekanauki.pl/articles/1044095.pdf  Link otwiera się w nowym oknie
Opis:
Transfer of foreign genes into plant cells can be accomplished by several methods: agrobacterium-mediated, microinjection, biolistic particle bombardment and electroporation. The last one is frequently used for transfection of plant protoplasts for transient gene expression. Electroporation is a simple procedure and allows transfecting a large number of cells at one time. Square wave-modulated porators are the most efficient for introducing expression cassettes into plant protoplasts. Based on a protocol developed by Wu & Feng (Plant Cell Reports, 1999, 18, 381-386), we optimized conditions for transfection of intact Nicotiana tabacum BY-2 cells using square wave-modulated electroporator. To simplify screening for transfected gene expression we used constructs with a GFP marker gene.Electroporation of cells in the presence of DNA has been widely used in recent years in molecular biology for studying transient gene expression. It consists in subjecting cells to an electric field, which forms pores in the lipid bilayer of the cell membrane, allowing DNA molecules to enter into the cytoplasm [1]. Pore formation is reversible and cell survival is maintained, thus such a method of introducing foreign DNA into cells is fast, simple, efficient, non-toxic and applicable to a great variety of cells. However, in spite of all its advantages electroporation has not been applied equally successfully in experiments with plant cells (except those with protoplasts) because of the cell wall. There are some earlier reports indicating that the cell wall does not prevent DNA molecules from being internalized [1-3]. In 1999 Wu and Feng [4] described an effective method of electroporation applicable to the intact plant cells. In this method plant cells are subjected to plasmolysis prior to electroporation. The modifications of these procedure are presented in this paper.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Various cationic carriers for in vitro transfection of tumor and endothelial cell lines.
Autorzy:
Zemlińska, Barbara
Sochanik, Aleksander
Missol-Kolka, Ewa
Szala, Stanisław
Tematy:
cationic carriers
in vitro transfection
luciferase reporter gene
Pokaż więcej
Wydawca:
Polskie Towarzystwo Biochemiczne
Powiązania:
https://bibliotekanauki.pl/articles/1043842.pdf  Link otwiera się w nowym oknie
Opis:
We compared the efficiency of in vitro DNA transfer into selected tumor and endothelial cell lines using complexes of plasmid DNA and cationic carriers: DDAB/DOPE, DC-Chol/DOPE, Arg-Chol/DOPE, Gly-Chol/DOPE, Arg-Gly-Chol/DOPE, BGTC/DOPE, and PEI. The best carriers for transfecting the majority of tested cells lines at optimized carrier-to-DNA weight ratios were PEI and BGTC/DOPE.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transfection methods for MSC cells.
Metody transfekcji komórek MSC.
Autorzy:
Wójcik, Gabriela
Opis:
The topic of mesenchymal stem cells (MSC) isolated from the bone marror is becoming more and more popular nowadays, especially in engineering and regenerative medicine. Their main role is to differentiate into cells and the ability to migrate into areas of tissue damage, which makes them candidates for various cellular therapies. Effective MSC genetic modification would allow the elimination of some genetic diseases and contribute to have a positive impact on the effectiveness of current therapy. The main point of my work is to summarize the currently used methods to transfect MSC, which is the genetic modification using non-viral carriers. Non-viral carriers are characterized by a lack of immunogenicity as compared to the transfected cells, they usually do not cause toxic effects, and is absent in the case of risk of mutation. Transfection efficiency with the use of such vehicles is lower than the virus. However, elimination of the side effects present at virus transductions is another step towards the development of genetic modifications.
StreszczenieOd lat mezenchymalne komórki macierzyste ( MSC ) pobierane ze szpiku kostnego cieszą się dużym zainteresowaniem inżynierii tkankowej i medycyny regeneracyjnej. Ich potencjał do różnicowania w komórki mezenchymy oraz zdolność do migracji w miejsca uszkodzeń tkanek czynią ich kandydatami do różnego rodzaju terapii komórkowych. Skuteczna modyfikacja genetyczna MSC pozwoliłaby na wyeliminowanie niektórych chorób genetycznych oraz wpłynęła by pozytywnie na skuteczność stosowanych obecnie terapi. Niniejsza praca podsumowuje obecnie wykorzystywane metody służących do transfekcji MSC, czyli do modyfikacji genetycznej za pomocą nośników nie-wirusowych. Nośniki nie-wirusowe charakteryzuje brak immunogenności w stosunku do transferowanych komórek, zazwyczaj nie wywołują one efektów toksycznych oraz nie występuje w ich przypadku ryzyko mutacji. Wydajność transfekcji z użyciem takich nośników jest niższa niż w przypadku wirusów, jednakże wyeliminowanie efektów ubocznych obecnych przy transdukcjach wirusowych jest kolejnym krokiem w stronę rozwoju modyfikacji genetycznych.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Haunted Bodies: Cell Switching, Getting Lost and Adaptive Geographies
Autorzy:
Grant, Jane
Whalley, Joanne “Bob”
Tematy:
: boundary
cell switching
hauntings
heteropathic exchange
sonic memory
surface
symbiogenesis
transfection
Pokaż więcej
Wydawca:
Projekt Avant
Powiązania:
https://bibliotekanauki.pl/articles/632564.pdf  Link otwiera się w nowym oknie
Opis:
This article proposes the ideas of stochastic resonance and noise as devices with which to think of the body or self as plural and porous. Boundaries and surfaces are proposed as indefinite; cell switching and narratives of the self are discussed in relation to external forces, via Arendt’s inter-subjectivity and La Celca’s colonization as infection. The sonic artwork Ghost, which uses models of spiking neurons to materialize endogenous and exogenous composition in relation to noise and sonic memory is presented as an exploration of the boundary or limit of the notion of self. This paper, which serves as a cogitatum (a force) rather than cognitio (the result), articulates the human body as a complex and open system that steers towards chaos by adapting and accepting further complexity as, and within, constantly adaptive networks of creativity. We suggest that by focusing on the porosity of boundaries and the mechanisms that underlie their permeability, problems around identity and subjectivity might be seen in a new light.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimisation of transfection conditions of CD34+ hematopoietic cells derived from human umbilical cord blood
Autorzy:
Ołdak, Tomasz
Kruszewski, Marcin
Machaj, Eugeniusz
Gajkowska, Agnieszka
Pojda, Zygmunt
Tematy:
CD34+ cells
umbilical cord blood
green fluorescent protein
transfection
Pokaż więcej
Wydawca:
Polskie Towarzystwo Biochemiczne
Powiązania:
https://bibliotekanauki.pl/articles/1043723.pdf  Link otwiera się w nowym oknie
Opis:
Human umbilical cord blood is frequently used as a source of transplantable hematopoietic cells and more recently as a target of gene therapy - a new approach for treatment of various disorders. The aim of our study was optimisation of the transfection conditions of cord blood-derived CD34+ hematopoietic cells. Mononuclear cells fraction was isolated from cord blood samples by density gradient centrifugation. Subsequently, CD34+ hematopoietic cells were separated on immunomagnetic MiniMACS columns. Pure population of CD34+ cells was incubated in a serum free medium supplemented with thrombopoietin, stem cell factor and Flt-3 ligand for 48 h and then transfected with plasmid DNA carrying the enhanced version of green fluorescent protein (EGFP) as a reporter gene. We studied the influence of various pulse settings and DNA concentrations on the transfection efficiency, measured by flow cytometry as the fluorescence of target cells due to the expression of EGFP. The optimal settings were as follows: 4 mm cuvette, 1600 μF, 550 V/cm, and 10 μg of DNA per 500 μl. With these settings we obtained a high transfection frequency (41.2%) without a marked decrease of cell viability. An increase of the pulse capacitance and/or of DNA concentration resulted in a greater electroporation efficiency, but also in a decrease of cell viability. In conclusion, the results described here allow one to recommend electroporation as an efficient method of gene delivery into CD34+ hematopoietic cells derived from human umbilical cord blood.
Dostawca treści:
Biblioteka Nauki
Artykuł

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