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Artificial Cells, Nanomedicine, and Biotechnology

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https://www.readbyqxmd.com/read/28084837/a-small-variation-in-average-particle-size-of-plga-nanoparticles-prepared-by-nanoprecipitation-leads-to-considerable-change-in-nanoparticles-characteristics-and-efficacy-of-intracellular-delivery
#1
Adem Sahin, Gunes Esendagli, Firat Yerlikaya, Secil Caban-Toktas, Digdem Yoyen-Ermis, Utku Horzum, Yesim Aktas, Mansoor Khan, Patrick Couvreur, Yilmaz Capan
In this study, it was aimed to investigate characteristics and intracellular delivery of two different-sized PLGA nanoparticles in ouzo region by considering number of nanoparticles. To determine the effect of formulation parameters on average particle size, Dil labeled nanoparticles were prepared using a three-factor, two-level full factorial statistical experimental design. PLGA230 (230.8 ± 4.32 nm) and PLGA160 (157.9 ± 6.16 nm) nanoparticles were obtained by altering polymer amount based on experimental design results and characterized...
January 13, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28079401/hemo2life-as-a-protective-additive-to-celsior-solution-for-static-storage-of-donor-hearts-prior-to-transplantation
#2
Elaine S Teh, Franck Zal, Valérie Polard, Philippe Menasché, David J Chambers
BACKGROUND: Prior to heart transplantation, static storage of donor hearts is currently limited to 4-5 h, despite profound hypothermia (4-8 °C). Because heart transplantation is an emergency procedure, improved protection to extend safe storage duration would be advantageous. We investigated whether the naturally respiratory pigment HEMO2life(®), which is effective at hypothermia for the passive release of oxygen via oxygen gradient, could improve long-term preservation. METHODS: Isolated Langendorff-perfused rat hearts (n = 12/group) were equilibrated (20 min) and function (left ventricular developed pressure: LVDP) measured by intraventricular balloon before arrest with cold (7...
January 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28078915/synthesis-and-characterization-of-thermosensitive-poly-n-vinylcaprolactam-g-collagen
#3
Serap Durkut, Yaşar Murat Elçin
In this study, we synthesized poly(N-vinylcaprolactam)-g-collagen (PNVCL-g-Col) by grafting collagen with carboxyl group-terminated thermosensitive PNVCL-COOH. The resulting biopolymer was evaluated for its structural, thermal, and rheological properties. Aqueous solutions of PNVCL-g-Col exhibited a temperature-dependent phase transition around human physiological temperature (at ∼38.5 °C), and temperature-dependent tunability. PNVCL-g-Col exhibited temperature-dependent release of the model drugs, lidocaine hydrochloride and bovine serum albumin...
January 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28078913/silibinin-loaded-magnetic-nanoparticles-inhibit-htert-gene-expression-and-proliferation-of-lung-cancer-cells
#4
Soumaye Amirsaadat, Younes Pilehvar-Soltanahmadi, Faraz Zarghami, Shahriar Alipour, Zohreh Ebrahimnezhad, Nosratollah Zarghami
Nanoparticle-based targeted drug delivery has the potential for rendering silibinin specifically at the favorite site using an external magnetic field. Also, it can circumvent the pitfalls of poor solubility. For this purpose, silibinin-loaded magnetic nanoparticles are fabricated, characterized and evaluated cytotoxicity and hTERT gene expression in A549 lung cancer cell line. silibinin-loaded PLGA-PEG-Fe3O4 had dose- and time-dependent cytotoxicity than pure silibinin. Additionally, hTERT expression is more efficiently reduced with increasing concentrations of nanosilibinin than pure silibinin...
January 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28076994/adapted-dexamethasone-delivery-polyethylene-oxide-and-poly-%C3%A9-caprolactone-construct-promote-mesenchymal-stem-cells-chondrogenesis
#5
Armaghan Ghiaee, Faeze Pournaqi, Saeid Vakilian, Abdolah Mohammadi-Sangcheshmeh, Abdolreza Ardeshirylajimi
Issues associated with tissue transplantation and shortage of donors has always been a concern, whereas tissue engineering has provided the hopeful opportunities. The aim of this study was to investigate the chondrogenic differentiation potential of mesenchymal stem cells (MSCs) in the presence of embedded Dexamethasone into electrospun Poly(ethyleneoxide) nanofibers composited with Poly(ɛ-caprolactone) nanofibers. Electrospun-fabricated scaffolds were characterized by SEM, tensile, contact angle, release profile, MTT assay, and chonderogenic differentiation of stem cells...
January 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28071140/development-and-characterization-of-polymer-lipid-hybrid-nanoparticles-for-oral-delivery-of-lmwh
#6
Supandeep Singh Hallan, Veerpal Kaur, Vikas Jain, Neeraj Mishra
The present study aimed to develop an improved oral delivery system for low-molecular-weight heparin (LMWH), novel polymer lipid hybrid nanoparticles were developed. LMWH loaded chitosan polymer lipid hybrid nanoparticles (LMWH-CS-PLNs) were developed using double emulsification and solvent evaporation method. The performance of developed formulations was evaluated by using in vitro and in vivo behavior, such as drug release studies, in vitro permeation study, in vivo venous thrombolytic study, in vitro uptake studies by using intestinal epithelium resembling Caco-2 cell lines...
January 10, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28064507/lantana-camara-linn-root-extract-mediated-gold-nanoparticles-and-their-in-vitro-antioxidant-and-cytotoxic-potentials
#7
Rajendiran Ramkumar, Govindasamy Balasubramani, Ramalingam Karthik Raja, Manickam Raja, Raji Govindan, Easwaradas Kreedapathy Girija, Pachiappan Perumal
The Lantana camara Linn root extract derived gold nanoparticles (Au NPs) were characterized by Ultraviolet-Visible spectroscopy, X-ray diffraction, fourier transform-infrared, high resolution transmission electron microscopy, selected area electron diffraction pattern and energy dispersive X-ray analyses. In DPPH assay, the inhibitory concentration (IC50) of Au NPs and gallic acid was 24.17 and 5.39 μg/ml, whereas, for cytotoxicity assay, the IC50 of Au NPs was 17.72 and 32.98 μg/ml on MBA-MB-231 and Vero cells, respectively...
January 9, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28058860/liposome-mediated-rna-interference-delivery-against-erk1-and-erk2-does-not-equally-promote-chemosensitivity-in-human-hepatocellular-carcinoma-cell-line-hepg2
#8
Amir Mehdizadeh, Mohammad Hossein Somi, Masoud Darabi, Safar Farajnia, Abolfazl Akbarzadeh, Soheila Montazersaheb, Mehdi Yousefi, Mortaza Bonyadi
BACKGROUND: Extracellular signal-regulated kinase (Erk)1 and Erk2 are central mediators of mitogen-activated protein kinase signaling pathway, which plays a key role in proliferation and chemoresistance of cancer cells. However, the effect of Erk1 and Erk2 in these processes may not be the same. The aim of this study was to investigate differential effect of Erk1 and Erk2 down-regulation on chemoresistance in human hepatocellular carcinoma (HCC) cells. Expression level and relative expression analysis in HepG2 cells were performed using RT-PCR and qRT-PCR, respectively...
January 6, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28050929/development-and-optimization-of-apigenin-loaded-transfersomal-system-for-skin-cancer-delivery-in-vitro-evaluation
#9
Manmohan Singh Jangdey, Anshita Gupta, Shailendra Saraf, Swarnlata Saraf
The aim of this work is to apply Box-Behnken design to optimize the transfersomes were formulated by modified rotary evaporation sonication technique using surfactant Tween 80. The response surface methodology was used having three-factored with three levels. The prepared formulations were characterized for vesicle shape, size, entrapment efficiency (%), stability, and in vitro permeation. The result showed that drug entrapment of 84.24% with average vesicle size of 35.41 nm and drug loading of 8.042%. Thus, optimized formulation was found good stability and is a promising approach to improve the permeability of apigenin in sustained release for prolonged period of time...
January 4, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28034322/copolymerization-of-recombinant-phascolopsis-gouldii-hemerythrin-with-human-serum-albumin-for-use-in-blood-substitutes
#10
Mariann Arkosi, Florina Scurtu, Adriana Vulpoi, Radu Silaghi-Dumitrescu, Donald Kurtz
Hemerythrin is an oxygen-carrying protein found in marine invertebrates and may be a promising alternative to hemoglobin for use in blood substitutes, primarily due to its negligible peroxidative toxicity. Previous studies have shown that glutaraldehyde-induced copolymerization of hemoglobin with bovine serum albumin increases the half-life of the active oxy form of hemoglobin (i.e. decreases the auto-oxidation rate). Here, we describe a protocol for glutaraldehyde copolymerization of Hr with human serum albumin and the dioxygen-binding properties of the co-polymerized products...
December 30, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27976931/a-novel-lc-ms-ms-method-for-mepivacaine-determination-and-pharmacokinetic-study-in-a-single-dose-two-period-crossover-in-healthy-subjects
#11
Ruo-Wang Duan, Jiong Song, Yu-Ping Li, Chun-Gen Xing
The objective of this work was to develop a simple, selective, and sensitive LC-MS/MS method for the quantitation of the mepivacaine in Chinese biological matrix. The calibration curve of mepivacaine ranged from 0.5 to 2000 ng/mL with the lower limit of quantitation being 0.5 ng/mL. This sensitivity was high enough to describe the profile of blood mepivacaine level versus time. Thereby it was very desirable for the pharmacokinetic study because of its high sensitivity and accuracy. The study used a single-dose two-period crossover design principle...
December 15, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27966375/controlled-biosynthesis-of-silver-nanoparticles-using-nitrate-reductase-enzyme-induction-of-filamentous-fungus-and-their-antibacterial-evaluation
#12
Sepideh Hamedi, Masumeh Ghaseminezhad, Soheila Shokrollahzadeh, Seyed Abbas Shojaosadati
The controlled synthesis of silver nanoparticles (AgNPs) using cell-free filtrate of Fusarium oxysporum fungus was investigated. The effect of fungal incubation period on nanoparticle formation and nitrate reductase enzyme activity was studied using UV-visible spectroscopy and Harley assay, respectively. The highest AgNP formation was observed in the cell-free filtrate of biomass harvested at the early stationary phase where the NR enzyme activity is the maximum. Mixing of the cell-free filtrates of fungal cultures obtained at 23, 28, and 33 °C with silver nitrate solution confirms the higher productivity of AgNP biosynthesis using the cell-free filtrate of fungus incubated at 28 °C...
December 14, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27966371/engineering-of-microcomplex-of-artemether-and-lumefantrine-for-effective-drug-treatment-in-malaria
#13
Pravin Shende, Prachi Desai, Ram S Gaud, Rohan Dhumatkar
The objective of the present work was to engineer and characterize stable citric acid cross-linked microcomplex of the inclusion complexes of artemether with β-cyclodextrin and Kollidon VA 64(®) with lumefantrine to release the drugs in controlled manner for effective combinational drug treatment in malaria. The microcomplex had a hydrodynamic diameter of 1047 ± 147 nm with surface charge of -19.7 ± 0.5 mV. The microcomplex showed high encapsulation efficiencies 85.6 ± 1.78% for artemether and 91...
December 14, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27936946/study-of-the-effects-of-polymerized-porcine-hemoglobin-ppolyhb-in-an-acute-anemia-rat-model
#14
Huifang Liu, Chengbin Yan, Kunping Yan, Wenjin Zhu, Yuesheng Shen, Bo Yang, Chao Chen, Hongli Zhu
The objective of this study was to investigate the recovery ability of polymerized porcine hemoglobin (pPolyHb) in a rat model of acute anemia caused by normovolemic hemodilution (ANH). After the ANH procedure, rats were infused with either pPolyHb or red blood cells. The results showed pPolyHb could carry a sufficient amount of oxygen to the tissues to maintain normal aerobic metabolism and hemodynamic stability, without any significant toxic effects on renal and liver function according to pathological, and biochemical analysis...
December 9, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27936945/zero-link-polymerized-hemoglobin-oxyvita-%C3%A2-hb-stabilizes-the-heme-environment-potential-for-lowering-vascular-oxidative-stress
#15
Hanna Wollocko, Sarah Anvery, Jacek Wollocko, John M Harrington, John P Harrington
A study was conducted to compare the resistance to heme exposure between myoglobin, bovine hemoglobin, and OxyVita(®)Hb (zero-link-hemoglobin-polymer). The rate of release of heme-iron is related to the tissue oxidative stress that can elicit deleterious effects in clinical uses of blood substitutes. Experimental work has focused on the unfolding of hemoglobin molecules, resulting in heme loss, by using urea as a denaturant and analyzing the Soret spectral region. These unfolding studies provide evidence for both the structural integrity and redox stability of OxyVita(®)Hb and demonstrate that OxyVita(®)Hb does not readily unfold and its heme exposure/release is greatly reduced...
December 9, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27929364/ipomoea-batatas-convolvulaceae-mediated-synthesis-of-silver-nanoparticles-for-controlling-mosquito-vectors-of-aedes-albopictus-anopheles-stephensi-and-culex-quinquefasciatus-diptera-culicidae
#16
V Pavithra Bharathi, C Ragavendran, N Murugan, D Natarajan
We proposed an effective and eco-friendly control of dengue, malaria, and filariasis-causing vectors. We tested Ipomoea batatas leaves-mediated silver nanoparticles (AgNPs) against first to fourth instar larvae and adults of Aedes albopictus, Anopheles stephensi, and Culex quinquefasciatus at different concentrations. The synthesized AgNPs showed broad spectrum of larvicidal and adulticidal effects after 48 h of exposure. The characterization of synthesized AgNPs was done using various spectral and microscopy analyses...
December 8, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27924631/cardioprotective-effects-of-curcumin-loaded-magnetic-hydrogel-nanocomposite-nanocurcumin-against-doxorubicin-induced-cardiac-toxicity-in-rat-cardiomyocyte-cell-lines
#17
Mehrdad Namdari, Ali Eatemadi
Curcumin, is a yellow substance extracted from Curcuma longa rhizomes, it is a crystalline compound that has been traditionally applied in culinary practices and medicines in India. The aim of our study is to demonstrate the efficacy of curcumin-loaded magnetic hydrogel nanocomposite in the treatment of heart hypertrophy. 10 rats weighing 150-200 g each were induced with heart failure using 2.5 mg/kg doxorubicin for 2 weeks. The test groups were treated with curcumin-loaded magnetic hydrogel nanocomposite while the control was treated with curcumin alone...
December 7, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27917689/green-synthesis-of-gold-and-silver-nanoparticles-using-aqueous-extract-of-cibotium-barometz-root
#18
Dandan Wang, Josua Markus, Chao Wang, Yeon-Ju Kim, Ramya Mathiyalagan, Verónica Castro Aceituno, Sungeun Ahn, Deok Chun Yang
Green synthesis of gold (CB-AuNps) and silver (CB-AgNps) nanoparticles using Cibotium barometz root extract was highlighted. CB-AuNps were synthesized almost instantly and CB-AgNps were formed after 25 min in a heated aqueous extract. The formation of CB-AuNps and CB-AgNps was detected at 548 and 412 nm; they were spherical with crystallite sizes of 6 nm and 23 nm, respectively. CB-AgNps were further investigated for their antimicrobial activity against Escherichia, Staphylococcus aureus, Salmonella enterica, and Pseudomonas aeruginosa...
December 4, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27917681/screening-of-process-variables-using-plackett-burman-design-in-the-fabrication-of-gedunin-loaded-liposomes
#19
Anil Kumar Sahu, Vishal Jain
This study is to screening the formulation and process variables that produce significant effect on the gedunin-loaded liposome formulations by using quality-by-design approach. Placket-Burman screening design was used to screen the most influencing formulation and process variables. Mean vesicle size, zeta potential, entrapment efficiency, and loading capacity were found in the range of 112-990 nm, -19.39 to -39.20 mV, 45.25-87.60%, and 3.54-10.47%, respectively. Differential scanning calorimetry (DSC) and powder X-ray diffraction (XRD) result suggested that Gedunin encapsulated within liposome as amorphous state...
December 4, 2016: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/27908201/cocos-nucifera-coir-mediated-green-synthesis-of-pd-nps-and-its-investigation-against-larvae-and-agricultural-pest
#20
Ganesh Elango, Selvaraj Mohana Roopan, Naif Abdullah Al-Dhabi, Mariadhas Valan Arasu, Kasinathan Irukatla Damodharan, Kuppuswamy Elumalai
In recent decades, several scientists focused their process towards nanoparticles synthesis by using various sustainable approaches. Cocos nucifera (C. nucifera) was one of the versatile trees in tropical regions which also can act as a thrust quencher in all over the world. Cocos nucifera coir was one of the waste by-products in all coconut-refining industries and with the help C. nucifera coir, Palladium nanoparticles (Pd NPs) were synthesized. Green-synthesized spherical-shape Pd NPs were over layered by secondary metabolites from C...
December 1, 2016: Artificial Cells, Nanomedicine, and Biotechnology
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