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Pluronic f 127

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https://www.readbyqxmd.com/read/30102250/substituting-gelatine-with-pluronic-f-127-matrix-in-3d-polymer-gel-dosimeters-can-improve-nuclear-magnetic-resonance-thermal-and-optical-properties
#1
Malwina Jaszczak, Radosław Wach, Piotr Maras, Mariusz Dudek, Marek Kozicki
This work discusses the substitution of a gelatine physical gel matrix with a matrix made of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (Pluronic F-127) in five 3D radiotherapy polymer gel dosimeters: MAGAT, PAGAT, NIPAM, VIPARnd (VIP) and VIPARCT (VIC). The current research outcomes showed that not each polymer gel dosimeter could be manufactured with Pluronic F-127. Two of the polymer gel dosimeters (PAGAT and VIP) containing the Pluronic F-127 matrix allowed for some proper dose response for radiotherapy dosimetry (a response to a dose range of e...
August 13, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/30087932/development-of-doxorubicin-loaded-magnetic-silica-pluronic-f-127-nanocarriers-conjugated-with-transferrin-for-treating-glioblastoma-across-the-blood-brain-barrier-using-an-in-vitro-model
#2
Geetha B Heggannavar, Chinmay G Hiremath, Divya D Achari, Vishwas G Pangarkar, Mahadevappa Y Kariduraganavar
Brain glioma is the most lethal type of cancer, with extremely poor prognosis and high relapse. Unfortunately, the treatment of brain glioma is often limited because of the low permeability of anticancer drugs across the blood-brain barrier (BBB). To circumvent this, magnetic mesoporous nanoparticles were synthesized and loaded with doxorubicin as an anticancer agent. These nanoparticles were fabricated with Pluronic F-127 and subsequently conjugated with transferrin (Tf) to achieve the sustained release of the drug at the targeted site...
July 31, 2018: ACS Omega
https://www.readbyqxmd.com/read/30074796/quenching-effects-of-graphene-oxides-on-the-fluorescence-emission-and-ros-generation-of-chloroaluminum-phthalocyanine
#3
Alan Rocha Baggio, Mayara Simonelly Costa Santos, Fabiane H Veiga-Souza, Rodrigo Barbosa Nunes, Paulo Eduardo N Souza, Sônia Nair Báo, Antonio Otavio Toledo Patrocinio, Detlef W Bahnemann, Luciano P Silva, Maria José A Sales, Leonardo Giordano Paterno
The photophysical behavior and reactive oxygen species (ROS) generation by chloroaluminum phthalocyanine (AlClPc) are evaluated by steady state absorption/emission, transient emission, and electron paramagnetic resonance spectroscopies in the presence graphene oxide (GO), reduced graphene oxide (RGO), and carboxylated nano graphene oxide (NGO). AlClPc and graphene oxides form a supramolecular structure stabilized by pi-pi interactions, which quantitatively quenches fluorescence emission and suppresses ROS generation...
August 3, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29998995/d-cycloserine-nasal-formulation-development-for-anxiety-disorders-by-using-polymeric-gels
#4
Yeonoh Shin, Rutika Kokate, Vilas Desai, Alok Bhushan, Gagan Kaushal
D-cycloserine (DCS), a partial agonist at N-methyl-D-aspartate (NMDA) receptors, is used as an enhancer of exposure therapy for anxiety disorders. The purpose of the present study was to investigate the feasibility of using polymeric gels to increase the viscosity of the formulation and thereby increase the nasal residence time and sustained release of DCS in vitro. Hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), and methyl cellulose (MC) were prepared at concentrations of 0.5 to 5% w/v...
2018: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/29985967/rosuvastatin-calcium-nanoparticles-improving-bioavailability-by-formulation-and-stabilization-codesign
#5
Doaa H Alshora, Mohamed A Ibrahim, Ehab Elzayat, Osaid T Almeanazel, Fars Alanazi
PURPOSE: Rosuvastatin calcium (ROSCa) is a poorly soluble drug with bioavailability not exceeding 20%. Decreasing the particle size may enhance its solubility, dissolution rate and bioavailability. Therefore, the aim of the current study is to prepare ROSCa nanoparticles by wet milling technique using planetary ball mill. The codesign between formulation and stabilization of nanoparticles was studied to achieve both high dissolution as well as bioavailability. METHODOLOGY: ROSCa nanosuspensions was prepared by wet milling technique using planetary ball mill, by applying milling ball size of 0...
2018: PloS One
https://www.readbyqxmd.com/read/29932793/the-intranasal-gels-of-box-behnken-experimental-design-for-preparation-and-optimization-of-selegiline-hydrochloride
#6
Sara Salatin, M Alami-Milani, R Daneshgar, M Jelvehgari
Selegiline hydrochloride (SL) is chosen as an adjunct for the control of clinical signs of Parkinsonian patients. The aim of the present work is to develop and optimize thermosensitive gels using Pluronic (F-127) for enhancing transport of SL into the brain through the nasal route. SL gels were prepared using a cold method and the Box-Behnken experimental design methodology. Drug (SL), gelling agent (F-127) and emulsifier (Propylene glycol, PG) were selected as independent variables while the gelation temperature, gel strength, pH, gel content, and gel erosion were considered as dependent variables...
June 22, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29923709/simple-d-a-d-structural-bisbithiophenyl-diketopyrrolopyrrole-as-efficient-bioimaging-and-photothermal-agents
#7
Shan Zong, Xin Wang, Wenhai Lin, Shi Liu, Wei Zhang
Design and synthesis of biocompatible and multifunctional photothermal agents is crucial for effective cancer phototherapy. In order to achieve this ambition, simple D-A-D structural bisbithiophenyl diketopyrrolopyrrole (TDPP) was fabricated. In this molecule, the donor, 2-thiophenylboric acid, was conjugated via Suzuki coupling reaction, which could expand the emission wavelength to the red region of the spectrum. TDPP could self-assemble into stable and uniform nanoparticles (TDPP NPs) in assistant of amphiphilic Pluronic F-127 polymer...
July 24, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29913220/nootropic-nanocomplex-with-enhanced-blood-brain-barrier-permeability-for-treatment-of-traumatic-brain-injury-associated-neurodegeneration
#8
Jeongmin Park, Eunshil Choi, Seulgi Shin, Sungsu Lim, Dohee Kim, Suji Baek, Kang Pa Lee, Jae Jun Lee, Byeong Han Lee, Bokyung Kim, Keunsoo Jeong, Ja-Hyun Baik, Yun Kyung Kim, Sehoon Kim
Traumatic brain injury (TBI) is an intracranial injury which can induce immediate neuroinflammation and long-term neurological deficits. Methylene blue (MB) as a nootropic has a great potential to treat neurodegeneration after TBI because of its anti-inflmmatory and neuroprotective functions. However, its limited accumulation to the brain across the blood-brain barrier (BBB) remains a major hurdle to be overcome. In this paper, we present a polymer surfactant-encapsulated nanocomplex of MB as a delivery system with high BBB permeability for efficacious treatment of TBI-induced neurodegeneration...
August 28, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29888441/programming-of-multicomponent-temporal-release-profiles-in-3d-printed-polypills-via-core-shell-multilayer-and-gradient-concentration-profiles
#9
Alexander P Haring, Yuxin Tong, Justin Halper, Blake N Johnson
Additive manufacturing (AM) appears poised to provide novel pharmaceutical technology and controlled release systems, yet understanding the effects of processing and post-processing operations on pill design, quality, and performance remains a significant barrier. This paper reports a study of the relationship between programmed concentration profile and resultant temporal release profile using a 3D printed polypill system consisting of a Food and Drug Administration (FDA) approved excipient (Pluronic F-127) and therapeutically relevant dosages of three commonly used oral agents for treatment of type 2 diabetes (300-500 mg per pill)...
June 10, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29869367/mode-of-action-of-poloxamer-based-surfactants-in-wound-care-and-efficacy-on-biofilms
#10
Steven L Percival, Rui Chen, Dieter Mayer, Anne-Marie Salisbury
Surfactants are widely used as detergents, emulsifiers, wetting agents, foaming agents, and dispersants in both the food and oil industry. Their use in a clinical setting is also common, particularly in wound care. Complicated or chronic wounds show clinical signs of delayed healing, persistent inflammation, and the production of non-viable tissue. These types of wounds also present challenges such as infection and potentially house antimicrobial-tolerant biofilms. The use of wound cleansers to aid cleaning and debridement of the wound is essential...
June 5, 2018: International Wound Journal
https://www.readbyqxmd.com/read/29789104/functionalized-caprolactone-polyethylene-glycol-based-thermo-responsive-hydrogels-of-silibinin-for-the-treatment-of-malignant-melanoma
#11
Behzad Sharif Makhmalzadeh, Ommoleila Molavi, Mohammad Reza Vakili, Hai-Feng Zhang, Amir Solimani, Hoda Soleymani Abyaneh, Raimar Loebenberg, Raymond Lai, Afsaneh Lavasanifar
PURPOSE: Silibinin, is a natural compound, which has shown anticancer activity in various malignancies. In this study, we evaluated the anticancer effects of silibinin in B16-F10 melanoma cells and developed a novel thermoresponsive hydrogel for local delivery of this compound. METHOD: A thermoresponsive hydrogel loaded with silibinin was prepared using triblock copolymers of poly[(α-benzyl carboxylate-e-caprolactone)-co-(α-carboxyl-e-caprolactone)]ran-b-PEG-b-[(α-benzyl carboxylate-e-caprolactone) -co-(α-carboxyl-e-caprolactone)]ran (PCBCL-b-PEG-b-PCBCL), namely PolyGelTM, and compared with a Pluronic F-127 formulation of silibinin...
2018: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29785557/highly-sensitive-ethanol-chemical-sensor-based-on-novel-ag-doped-mesoporous-%C3%AE-fe-2-o-3-prepared-by-modified-sol-gel-process
#12
Moteb M Alqahtani, Atif M Ali, Farid A Harraz, M Faisal, Adel A Ismail, Mahmoud A Sayed, M S Al-Assiri
Mesoporous α-Fe2 O3 has been synthesized via a simple sol-gel procedure in the presence of Pluronic (F-127) triblock copolymer as structure directing agent. Silver (Ag) nanoparticles were deposited onto α-Fe2 O3 matrix by the photochemical reduction approach. Morphological analysis revealed the formation of Ag nanoparticles with small sizes < 20 nm onto the mesoporous structure of α-Fe2 O3 possessing < 50 nm semi-spherical shape. The XRD, FTIR, Raman, UV-vis, PL, and N2 sorption isotherm studies confirmed the high crystallinity, mesoporosity, and optical characteristics of the synthesized product...
May 21, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29761649/polyphenol-poloxamer-self-assembled-supramolecular-nanoparticles-for-tumor-nirf-pet-imaging
#13
Xinyu Wang, Junjie Yan, Donghui Pan, Runlin Yang, Lizhen Wang, Yuping Xu, Jie Sheng, Yuanyuan Yue, Qianhuan Huang, Yanting Wang, Rongrong Wang, Min Yang
Self-assembled supramolecular nanoparticles have remarkable benefits in bioimaging and drug delivery. Here it is first reported that polyphenol and poloxamer self-assemble supramolecular nanoparticles (PPNPs). PPNPs are fabricated by multivalent hydrogen bonding between tannic acid and Pluronic F-127 together with hydrophobic interactions of poly(propylene oxide) chains, to be applied in tumor near-infrared fluorescence (NIRF) imaging and positron emission tomography (PET) imaging. With near-infrared fluorescent dyes such as IR780 encapsulated via hydrophobic interactions, PPNPs are used in NIRF imaging...
May 14, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29620020/tetrazolium-salts-pluronic-f-127-gels-for-3d-radiotherapy-dosimetry
#14
Klaudia Kwiatos, Piotr Maras, Slawomir Kadlubowski, Zbigniew Stempień, Mariusz Dudek, Marek Kozicki
This work is a follow-up study for a recently-proposed 3D radiochromic gel dosimeter that contains a tetrazolium salt and a physical gel matrix made of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (Pluronic F-127). Several tetrazolium salts were examined in this work, including tetrazolium violet, blue tetrazolium chloride, nitro blue tetrazolium chloride (NBT), tetranitro blue tetrazolium chloride (tNBT) and thiazolyl blue tetrazolium bromide (TBTB). The salt-containing gel dosimeters were compared with the first Pluronic gel composition that contained 2,3,5-triphenyltetrazolium chloride (TTC) as the radiation-sensitive component (dose sensitivity of 0...
May 4, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29608119/peri-tumor-administration-of-5-fluorouracil-sol-gel-using-a-hollow-microneedle-for-treatment-of-gastric-cancer
#15
Yoon Suk Jung, Dong-Hoe Koo, Jeong-Yoon Yang, Hee-Young Lee, Jung-Hwan Park, Jung Ho Park
The aim of this study was to investigate the effectiveness of treating gastric cancer by injecting a pluronic F-127 sol-gel formulation of 5-fluorouracil (5-FU) into normal tissue surrounding the tumor using a hollow microneedle. The MTS tetrazolium assay was performed to assess the cytotoxicity of 5-FU after application to gastric cancer cells at different concentrations for 1, 5 and 10 h. Gastric cancer cells were inoculated subcutaneously into 30 male nude mice (CrjBALB/c-nu/nu mice, male); the inoculated mouse were divided into three groups...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29600660/-subchondral-drilling-method-combined-with-gum-bletilla-complex-to-repair-articular-cartilage-defects
#16
Yong Huang, Xin-Ling Wang, Heng Qiu, Yi-Cheng Xiao, Zong-Hong Wu, Jian Xu
Two types(A model and B model) of articular cartilage defect models were prepared by using adult New Zealand white rabbits. A model group was applied by drilling without through subchondral bone, whose right joint was repaired by composite scaffolds made by seed cell, gum-bletilla as well as Pluronic F-127, and left side was blank control. B model group was applied by subchondral drilling method, whose right joint was repaired by using composite scaffolds made by gum-bletilla and Pluronic F-127 without seed cells, and left side was blank control...
February 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29566327/synthesis-of-iron-oxide-nanoclusters-by-thermal-decomposition
#17
Aleksey A Nikitin, Igor V Shchetinin, Natalya Yu Tabachkova, Mikhail A Soldatov, Alexander V Soldatov, Natalya V Sviridenkova, Elena K Beloglazkina, Alexander G Savchenko, Natalya D Fedorova, Maxim A Abakumov, Alexander G Majouga
Herein, we report a novel one-step solvothermal synthesis of magnetite nanoclusters (MNCs). In this report, we discuss the synthesis, structure, and properties of MNCs and contrast enhancement in T2 -weighted MR images using magnetite nanoclusters. The effect of different organic acids, used as surfactants, on the size and shape of MNCs was investigated. The structure and properties of samples were determined by magnetic measurements, TGA, TEM, HRTEM, XRD, FTIR, and MRI. Magnetic measurements show that obtained MNCs have relatively high saturation magnetization values (65...
April 17, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29502417/quantifying-vascular-distribution-and-adhesion-of-nanoparticles-with-protein-corona-in-microflow
#18
Yan Teck Ho, Sharon Wei Ling Lee, Nurul 'Ain Azman, Fion Wen Yee Loh, Nhan Phan Thien, James Chen Yong Kah
The protein corona has emerged as an important determinant of biological response in nanoparticle (NP) drug delivery. However, there is presently no reported study on how the protein corona affects the behavior of NPs in microflow and its subsequent interactions with the vascular endothelium, which could affect their delivery to the target tumor site regardless of its targeting mechanism. Furthermore, a consensus on the role of physical and surface characteristics of NPs in affecting the margination of NPs is lacking due to different methods of quantifying margination...
March 27, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29448643/effect-of-colloidal-medium-on-the-shelf-life-and-stability-of-gold-nanorods-prepared-by-seed-mediated-synthesis
#19
Parveer Kaur, Bhupendra Chudasama
Gold nanorods (GNRs) owing to their tunable longitudinal surface plasmon resonance in tissue transparent near infrared region have potential applications (like cancer imaging, surface enhanced Raman spectroscopy, cancer targeting, drug delivery and optical hyperthermia) in nanomedicine. Success of these diagnosis/therapy options depends on the plasmonic properties of gold nanorods, which are influenced by the interaction of GNRs with the colloidal medium. In this article, a systematic study is performed to evaluate the effect of colloidal medium on shelf life and stability of gold GNRs...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29366939/statistical-design-of-experiment-doe-based-development-and-optimization-of-db213-in-situ-thermosensitive-gel-for-intranasal-delivery
#20
Qianwen Wang, Chun-Ho Wong, H Y Edwin Chan, Wai-Yip Lee, Zhong Zuo
DB213 is an HIV-1 replication inhibitor targeting the Central Nervous System for the treatment of HIV-associated neurocognitive disorders. Current study aims to develop an in situ thermosensitive gelling system for intranasal delivery of DB213 facilitated by Statistical Design of Experiment (DoE) to conduct a more efficient experimentation by extracting the maximum amount of information from limited experiments. In our current study, information was extracted from twenty-five experimental designs from MODDE® Software and a mathematical model was successfully developed to predict formulations to achieve desired performance as well as to analyze relationships between the amount of Pluronic F-127, Pluronic F-68, Chitosan, DB213 and the performances of in situ thermosensitive gels...
March 25, 2018: International Journal of Pharmaceutics
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