Neuroendocrine toxicity and immunotoxicity of polymeric nanoparticle poly(ethylene glycol)-block-polylactide methyl ether (PEG-b-PLA) in juvenile female Wistar rats

2015 ◽  
Vol 238 (2) ◽  
pp. S209
Author(s):  
E. Rollerova ◽  
J. Tulinska ◽  
M. Kuricova ◽  
A. Liskova ◽  
J. Kovriznych ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Methyl Ether ◽  
Wistar Rats ◽  
Poly Ethylene Glycol ◽  
Juvenile Female ◽  
Polymeric Nanoparticle ◽  
Female Wistar Rats ◽  
Poly Ethylene

scholarly journals Adverse eff ects of polymeric nanoparticle poly(ethylene glycol)- block-polylactide methyl ether (PEG-b-PLA) on steroid hormone secretion by porcine granulosa cells

2017 ◽  
Vol 51 (2) ◽  
pp. 96-104 ◽  
Author(s):  
Sona Scsukova ◽  
Mlynarcikova A. Bujnakova ◽  
A. Kiss ◽  
E. Rollerova
Keyword(s):  
Ethylene Glycol ◽  
Methyl Ether ◽  
Granulosa Cells ◽  
Steroid Hormone ◽  
Average Molecular Weight ◽  
Hormone Secretion ◽  
Poly Ethylene Glycol ◽  
Polymeric Nanoparticle ◽  
Progesterone Secretion ◽  
Poly Ethylene

AbstractObjectives. Development of nanoparticles (NPs) for biomedical applications, including medical imaging and drug delivery, is currently undergoing a dramatic expansion. Diverse effects of different type NPs relating to mammalian reproductive tissues have been demonstrated. Th e objective of this study was to explore the in vitro effects of polymeric nanoparticle poly(ethylene glycol)-blockpolylactide methyl ether (PEG-b-PLA NPs) on functional state and viability of ovarian granulosa cells (GCs), which play an important role in maintaining ovarian function and female fertility.Methods. The GCs isolated from porcine ovarian follicles were incubated with the different concentrations of PEG-b-PLA NPs (PEG average Mn=350 g/mol and PLA average Mn=1000 g/mol; 0.2-100 μg/ml) or poly(ethylene glycol) with an average molecular weight of 300 (PEG-300; 0.2- 40 mg/ml) in the presence or absence of stimulators, follicle-stimulating hormone (FSH; 1 μg/ml), androstenedione (100 nM), forskolin (10 μM) or 8Br-cAMP (100 μM), for different time periods (24, 48, 72 h). At the end of the incubation, progesterone and estradiol levels produced by GCs were measured in the culture media by radioimmunoassay. Th e viability of GCs was determined by the method using a colorimetric assay with MTT.Results. Treatment of GCs with PEG-b-PLA NPs induced a significant decrease in basal as well as FSH-stimulated progesterone secretion above the concentration of 20 and 4 μg/ml, respectively. Moreover, PEG-b-PLA NPs reduced forskolin-stimulated, but not cAMP-stimulated progesterone production by GCs. A dose-dependent inhibition of androstenedione-stimulated estradiol release by GCs was found by the action of PEG-b-PLA NPs. Incubation of GCs with PEG-300 significantly inhibited basal as well as FSH-stimulated progesterone secretion above the concentration of 40 mg/ml. PEG-b-PLA NPs and PEG-300 significantly reduced the viability of GCs at the highest tested concentrations (100 μg/ml and 40 mg/ml, respectively).Conclusions. The obtained results indicate that polymeric NPs PEG-b-PLA might induce alterations in steroid hormone production by ovarian GCs and thereby could modify reproductive functions.

Magnetite nanoparticles stabilized with polymeric bilayer of poly(ethylene glycol) methyl ether–poly(ɛ-caprolactone) copolymers

Polymer ◽  
2008 ◽  
Vol 49 (18) ◽  
pp. 3950-3956 ◽  
Author(s):  
Siraprapa Meerod ◽  
Gamolwan Tumcharern ◽  
Uthai Wichai ◽  
Metha Rutnakornpituk
Keyword(s):  
Ethylene Glycol ◽  
Methyl Ether ◽  
Magnetite Nanoparticles ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

Photoinduced Iron-Based Water-Induced Phase Separable Catalysis (WPSC) ICAR ATRP of Poly(ethylene glycol) Methyl Ether Methacrylate

2017 ◽  
Vol 38 (12) ◽  
pp. 1700116 ◽  
Author(s):  
Jian Wu ◽  
Bingjie Zhang ◽  
Lifen Zhang ◽  
Zhenping Cheng ◽  
Xiulin Zhu
Keyword(s):  
Ethylene Glycol ◽  
Methyl Ether ◽  
Poly Ethylene Glycol ◽  
Iron Based ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

The role of hydrogen bonding in alginate/poly(acrylamide-co-dimethylacrylamide) and alginate/poly(ethylene glycol) methyl ether methacrylate-based tough hybrid hydrogels

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57678-57685 ◽  
Author(s):  
Zhi Wei Low ◽  
Pei Lin Chee ◽  
Dan Kai ◽  
Xian Jun Loh
Keyword(s):  
Hydrogen Bonding ◽  
Elastic Modulus ◽  
Ethylene Glycol ◽  
Methyl Ether ◽  
Poly Ethylene Glycol ◽  
Hybrid Hydrogels ◽  
Poly Ethylene ◽  
Glycol Methyl Ether ◽  
Poly Acrylamide

Hybrid hydrogels, with an elastic modulus and compressive toughness of 350 kPa and 70 J m−3, was synthesized and reported here.

The Influences of Monomer Structure and Solvent on the Radical Copolymerization of Tertiary Amine and PEGylated Methacrylates

2021 ◽  
Author(s):  
Priscila Quiñonez-Angulo ◽  
Robin Hutchinson ◽  
Angel Licea-Claverie ◽  
Enrique Saldivar ◽  
Ivan Zapata-Gonzalez
Keyword(s):  
Ethylene Glycol ◽  
Methyl Ether ◽  
Tertiary Amine ◽  
Radical Copolymerization ◽  
Poly Ethylene Glycol ◽  
Ethyl Methacrylate ◽  
Monomer Structure ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

Tertiary Amine Methacrylates (TAMAs), such as 2-(N,N-diethylamino)ethyl methacrylate (DEAEMA) and 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA), and PEGylated (macro)monomers, such as 2-ethoxyethyl methacrylate (EEMA1) and poly(ethylene glycol) methyl ether methacrylates with 9 and...

Control the Surface Wettability of Thermo-Responsive Poly(Ethylene Glycol Methyl Ether methacrylate-co-Triethylene Glycol Methyl Ether Methacrylate) Thin Film by Varying Temperature

2021 ◽  
Vol 873 ◽  
pp. 53-58
Author(s):  
Yang Yi Chen ◽  
Min Pan ◽  
Shan Hong Hu ◽  
Qi Huan ◽  
Chu Yang Zhang
Keyword(s):  
Thin Film ◽  
Ethylene Glycol ◽  
Methyl Ether ◽  
Triethylene Glycol ◽  
Surface Wettability ◽  
Molar Ratio ◽  
Poly Ethylene Glycol ◽  
Vis Spectroscopy ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

The surface wettability of thermo-responsive random poly (ethylene glycol methyl ether methacrylate-co-triethylene glycol methyl ether methacrylate), abbreviated as P(MEOMA-co-MEO3MA), was investigated in thin film. UV-Vis spectroscopy shows that the LCST of P(MEOMA-co-MEO3MA) with molar ratios of 0:20, 6:14 and 9:11 were 43°C, 32 oC and 25 oC, respectively. LCST shifts towards lower temperature when molar ratio of MEOMA increases. ATR-FTIR indicates that P(MEOMA-co-MEO3MA) thin film experienced a collapse when the temperature passes its LCST. The contact angle of the paraffin oil on the film decreases 15o when the temperature is above its LCST, which confirms the surface wettability can be controlled. Atomic force microscopy shows the surface of the swollen thin film becomes rougher when above it LCST.

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