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Wyszukujesz frazę "PLGA nanoparticles" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Effects of Insulin and Embryonic Stem Cells loaded PLGA Nanoparticles on Pancreatic Beta TC Cells
Autorzy:
Yücel, Çiğdem
Aktaş, Yeşim
Değim, Zelihagül
Yılmaz, Şükran
Arsoy, Taibe
Altıntaş, Levent
Çokçalışkan, Can
Sözmen, Mahmut
Powiązania:
https://bibliotekanauki.pl/articles/895523.pdf
Data publikacji:
2018-12-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
diabetes
insulin
embryonic stem cell
PLGA nanoparticles
pancreatic beta TC cell
Opis:
In The present study, the aims was to investigate and compare the effect of insulin and embryonic stem cells (ESC) loaded nanoparticle formulations (NPs) on pancreatic-beta-TC-cell regeneration. Characterization studies of NPs were performed. Permeability of insulin and the effect of ESC on pancreatic beta cells were investigated. by the determination of Insulin or glucose levels were determined and histologic investigations were also performed. ESC encapsulation efficiency was calculated by western blot analysis. The particle sizes of insulin and ESC-loaded-NPs were determined as 0.665±0.202 µm and 0.650 ±0.310 µm. The mean zeta potentials of insulin and ESC-loaded-NPs nanoparticles were found as 6.88±0.729 mV, 5.13±0.631 mV. The polydispersity index of insulin and ESC nanoparticles were 0.660±0.175, 0.620±0.205 respectively. Encapsulation efficiency of insulin and ESC-loaded-NPs were found to be 50±1.53% and 51%. Insulin release from nanoparticles was found to be 72.8% over 48h. The gGlucose concentrations wasere decreased to 201 and 202.7 mg/dl from 250 mg/dl in streptozocin (STZ) induced diabetic mice group after insulin and ESC-loaded-NPs administration. Insulin and ESC-loaded-NPs improved the blood insulin levels in all experimental groups. These NPs may be used for repairing of pancreatic cells. Healing or some degree of regeneration was observed when insulin and ESC-loaded-NPs were administered to the mice ip. ESC-loaded-NPs can be a potential source for cell replacement therapy in the treatment of diabetes.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 6; 1377-1389
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparative study of influence of lactic and glycolic acids copolymers type on properties of daunorubicin loaded nanoparticles and drug release
Autorzy:
Nikolskaya, E.
Sokol, M.
Faustova, M.
Zhunina, O.
Mollaev, M.
Yabbarov, N.
Tereshchenko, O.
Popov, R.
Severin, E.
Powiązania:
https://bibliotekanauki.pl/articles/307136.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nanocząsteczki
daunorubicyna
PLGA
uwalnianie kontrolowane
stała dysocjacji
nanoparticles
daunorubicin
controlled release
MCF7/MCF7 Adr
dissociation constant
Opis:
The aim of this study was to compare the physico-chemical and biological properties of polymeric nanoparticles obtained from poly(DL-lactide-co-glycolide) (PLGA) with different ratios of monomers loaded with daunorubicin (DNR). Methods: DNR-loaded nanoparticles (NPs) were prepared with use of modified simultaneous double-emulsion solvent evaporation/diffusion technique. NPs were characterized using dynamic light scattering, atomic force microscopy, transmission electron microscopy, scanning electron microscopy, and differential scanning calorimetry and Fourier transform infrared spectroscopy. Results: NPs with DNR were differing in size and zeta potential, depending on the type of polymer. The data obtained show that total content of DNR correlates with the values of the binding constant of DNR with polymers. The release of DNR from NPs proceeds predominantly for polymers with lower binding constants. The in vitro study of NPs on the MCF-7 cells showed similar activity of particles and substances while for the anthracycline-resistant MCF-7Adr cells the cytotoxicity of the nanoparticles was 3 to 7 times higher depending on the type of copolymer. Conclusions: PLGA DNR-loaded nanoparticles can be used to overcome multidrug resistance (MDR) as well as for reducing the frequency of DNR reception due to the prolonged effect, which allows maintaining the concentration of the drug at the required level. The usefulness of binding constant calculations for obtaining nanoparticles with the maximum drug loading was proven. The rate of drug administration and the frequency of administration can be calculated based on the DNR release profiles and release parameters that depend on polymer type.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 1; 65-77
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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