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https://www.readbyqxmd.com/read/30513707/investigation-of-combined-cyclodextrin-and-hydrogel-formulation-for-ocular-delivery-of-dexamethasone-acetate-by-means-of-experimental-designs
#1
Roseline Mazet, Luc Choisnard, Delphine Levilly, Denis Wouessidjewe, Annabelle Gèze
Dexamethasone acetate (DXMa) has proven its efficiency to treat corneal inflammation, without a great propensity to increase intraocular pressure. Unfortunately, its poor aqueous solubility, associated with a rapid precorneal elimination, results in a low drug bioavailability and a low penetration after topical ocular administration. The main objective of this study was to improve the apparent aqueous solubility of DXMa using cyclodextrins. First, hydroxypropyl-β-CD (HPβCD) and hydroxypropyl-γ-CD (HPγCD) were used to enhance DXMa concentration in aqueous solution...
December 1, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/30513470/novel-controlled-drug-release-system-engineered-with-inclusion-complexes-based-on-carboxylic-graphene
#2
Yinghong Xiao, Ming Zhang, Yunting Fan, Qicheng Zhang, Yuli Wang, Wenwen Yuan, Ninglin Zhou, Jianfei Che
A novel drug carrier is constructed by compositing hydrophilic hydroxypropyl-β-cyclodextrins (HP-β-CD) and carboxylated graphene nanomaterial (GO-COOH). Fourier transform infrared spectroscopy confirms that the two materials are successfully combined via chemical bonds. Further, a crosslinking agent of glutaraldehyde is applied to fabricate composite GO-COO-HP-β-CD nanospheres, as demonstrated by an atomic force microscope. Dexamethasone (DEX) is selected as the model drug, and the drug loading efficiency and water solubility of the nanospheres greatly increased...
November 28, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/30511358/quercetin-and-3-o-methylquercetin-in-vitro-skin-layers-permeation-retention-from-hydrogels-why-only-a-methoxy-group-difference-determines-different-behaviors
#3
Liege C Schwingel, Sara E Bianchi, Giovanni K Zorzi, Paulo Gonçalves, Helder F Teixeira, Valquiria L Bassani
OBJECTIVES: The present study was designed to verify if quercetin (QCT), a flavonoid with antioxidant and antiviral activity, and 3-O-methylquercetin (3OMQ), a quercetin C3-methoxylated derivative, present differences in their behavior against complexation with β-cyclodextrin (β-CD) and the corresponding permeation/retention trhough porcine ear skin, when incorporated into hydroxypropyl methylcellulose (HPMC) or chitosan (CS) hydrogels. METHODS: The influence of β-CD on the skin permeation/retention of QCT and 3OMQ from hydrogels is comparatively evaluated for both flavonoids using porcine ear skin in Franz cells model...
December 3, 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/30500018/the-influence-of-trapping-agents-on-the-antitumor-efficacy-of-irinotecan-liposomes-head-to-head-comparison-of-ammonium-sulfate-sulfobutylether-%C3%AE-cyclodextrin-and-sucrose-octasulfate
#4
Wenqian Yang, Zimeng Yang, Jingru Fu, Mengran Guo, Bingjun Sun, Wei Wei, Dan Liu, Hongzhuo Liu
Remote loading technology is an outstanding achievement in liposome-based drug delivery systems. Compared with conventional passive loading, remote loading technology exhibits unique superiority in terms of high drug loading efficiency, low leakage rate and adequate drug accumulation. In the intra-liposome aqueous phase, the counterion of the trapping agent can control the state of aggregation/crystallization of the drug-counterion salt, and thereby contribute to control the efficiency of remote loading. Herein, irinotecan (CPT-11)-loaded liposomes were developed using three trapping agents: ammonium sulfate (AS), sulfobutylether-β-cyclodextrin (SBE-β-CD) and sucrose octasulfate (SOS)...
November 30, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/30496863/preparation-and-evaluation-of-freeze-dried-surface-deacetylated-chitin-nanofiber-sacran-pellets-for-use-as-an-extended-release-excipient
#5
Miwa Goto, Shinsuke Ifuku, Kazuo Azuma, Hidetoshi Arima, Shinichiro Kaneko, Daisuke Iohara, Fumitoshi Hirayama, Makoto Anraku
Pelleted preparations were formulated from sacran (Sac), an anionic, sulfated, carboxyl-containing polysaccharide, which is extracted from the Japanese indigenous cyanobacterium Aphanothece sacrum, and surface-deacetylated chitin nanofibers (SDACNF). The use of this material as an extended-release excipient for tetrahydrocurcumin (THC), a model drug that is used to treat wounds via its radical scavenging ability was examined. The THC used in the study was complexed with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD), which increases its water solubility...
November 26, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/30486514/photothermally-controlled-methotrexate-release-system-using-%C3%AE-cyclodextrin-and-gold-nanoparticles
#6
Nataly Silva, Ana Riveros, Nicolás Yutronic, Erika Lang, Boris Chornik, Simón Guerrero, Josep Samitier, Paul Jara, Marcelo J Kogan
The inclusion compound (IC) of cyclodextrin (CD) containing the antitumor drug Methotrexate (MTX) as a guest molecule was obtained to increase the solubility of MTX and decrease its inherent toxic effects in nonspecific cells. The IC was conjugated with gold nanoparticles (AuNPs), obtained by a chemical method, creating a ternary intelligent delivery system for MTX molecules, based on the plasmonic properties of the AuNPs. Irradiation of the ternary system, with a laser wavelength tunable with the corresponding surface plasmon of AuNPs, causes local energy dissipation, producing the controlled release of the guest from CD cavities...
November 28, 2018: Nanomaterials
https://www.readbyqxmd.com/read/30466926/the-effect-of-intake-of-sausages-fortified-with-%C3%AE-cd-i2-complex-on-iodine-status-and-thyroid-function-a-preliminary-study
#7
Maksym Polumbryk, Victor Kravchenko, Vasyl Pasichnyi, Chrystyna Omelchenko, Irina Pachitskaya
The present study evaluated influence of boiled sausages consumption fortified with β-CD-I2 on the urinary iodine excretion (UIE) level of volunteers. Median urinary UIE level was increased from 58.02 (24.0-175.4) μg/L to 110.6 (20.5-231.6) μg/L during 10 days. Thyroid stimulating hormone (TSH) and free thyroxine (FT4) levels were determined by radio immunoassay analysis. As it was expected, intake of sausages fortified with β-CD-I2 resulted in rise of FT4 level from 1.1 (0.95-1.25) to 1.23 (1.07-1.63) ng/dL, whereas TSH level decreased from 1...
January 2019: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/30453664/designing-a-formulation-of-the-nootropic-drug-aniracetam-using-2-hydroxypropyl-%C3%AE-cyclodextrin-suitable-for-parenteral-administration
#8
Sebastian D Goldsmith, Arlene McDowell
The nootropic drug aniracetam is greatly limited in its application by low aqueous solubility and a poor oral bioavailability. The primary aim of this study was to design a parenteral formulation of aniracetam that can be administered intravenously. Complexation of aniracetam with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) was investigated as a strategy to enhance solubility. A phase solubility analysis was performed to quantify the extent of improvement. An 819% increase in the solubility of aniracetam was obtained, reaching 36...
November 18, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/30446131/synthesis-and-characterization-of-supramolecular-systems-containing-nifedipine-%C3%AE-cyclodextrin-and-aspartic-acid
#9
Juan Pablo Cerutti, Mario Alfredo Quevedo, Natalia Buhlman, Marcela Raquel Longhi, Ariana Zoppi
The purpose of this work was to characterize complexes of nifedipine with β-cyclodextrin (β-CD), with and without auxiliary agents, to improve aqueous solubility and the dissolution profile of nifedipine. Complexes were characterized using infrared spectroscopy, thermoanalytical methods, powder X-Ray diffraction, scanning electron microscopy, phase solubility analysis and dissolution studies. Spatial configurations were determined by NMR and further examined using computational techniques. This investigation showed that the amino acid Asp was the most efficient auxiliary agent for multicomponent complexes...
February 1, 2019: Carbohydrate Polymers
https://www.readbyqxmd.com/read/30430588/a-novel-colorimetric-immunosensor-based-on-ptnps-immobilized-on-power-vision-as-signal-probes-and-fe-3-o-4-%C3%AE-cyclodextrin-as-capture-probes-for-ractopamine-detection-in-pork
#10
Yangying Sun, Tian Fu, Shuxian Chen, Zhen Wu, Yuxing Guo, Daodong Pan, Ning Gan
BACKGROUND: A novel colorimetric immunosensor was developed for the simple, sensitive, and selective detection of ractopamine (RAC) based on using β-cyclodextrin-modified Fe3 O4 particles (Fe3 O4 @β-CD) as capture probes and complex platinum colloid nanomaterials (PtNPs-PV) composed of platinum colloid nanomaterials (PtNPs) and polymerase chelate PowerVision (PV) as signal probes. RESULTS: PtNPs-PV double catalyzed the chromogenic substrate 3,3'-diaminobenzidine (DAB), which induced changes in DAB's color and chromogenic absorbance...
November 14, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/30423941/experimental-and-modeling-study-of-drug-release-from-hpmc-based-erodible-oral-thin-films
#11
Alessandra Adrover, Gabriele Varani, Patrizia Paolicelli, Stefania Petralito, Laura Di Muzio, Maria Antonietta Casadei, Ingunn Tho
In this work hydroxypropyl methylcellulose (HPMC) fast-dissolving thin films for oral administration are investigated. Furosemide (Class IV of the Biopharmaceutical Classification System) has been used as a model drug for in vitro release tests using three different set-ups: the Franz cell, the millifluidic flow-through device, and the paddle type dissolution apparatus (USP II). In order to enable drug incorporation within HPMC films, a multifunctional excipient, hydroxypropyl- β -cyclodextrin (HP- β -CD) has been included in the formulation, and the influence of HP- β -CD on film swelling, erosion, and release properties has been investigated...
November 9, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/30419519/facile-synthetic-photoluminescent-graphene-quantum-dots-encapsulated-%C3%AE-cyclodextrin-drug-carrier-system-for-the-management-of-macular-degeneration-detailed-analytical-and-biological-investigations
#12
Cheng Qian, Panshi Yan, Guangming Wan, Shenzhi Liang, Yi Dong, Jiong Wang
Drug administration by effective nano-carriers is an emerging and growing technology in the field of bio-medicine and particularly Age -related macular degeneration (AMD). This developed nanomaterials based methods with drug administration maximizes the biocompatibility and systemically increases drug delivery profile for the drugs. Herein, we described the effective drug molecules delivery profiles by the hydrothermally synthesized graphene quantum dots (GQDs) encapsulated with supramolecular β-cyclodextrin (β-CD) as a drug delivery system for AMD...
October 26, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/30416358/the-effect-of-polymer-length-on-the-in-vitro-characteristics-of-a-drug-loaded-and-targeted-silica-nanoparticles
#13
Areen M Khattabi, Wamidh H Talib, Diala A Alqdeimat
The objective of this research was to investigate the effect of polymer length on the in vitro characteristics of thymoquinone-melatonin (TQ-MLT) when loaded into our previously prepared targeted drug delivery system (TDDS). Our system constructed from silica nanoparticles (NPs) and modified with diamine polymer (D4000), carboxymethyl-β-cyclodextrin (CM-β-CD) and folic acid (FA), respectively. In this study, three other different lengths of polymers (D230, D400 and D2000) were used and compared to D4000. The surface modification was characterized using fourier transform infrared spectroscopy (FTIR) and the mean particle size as well as polydispersity (PD) was measured using dynamic light scattering (DLS)...
November 2018: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/30412380/differential-metal-ion-sensing-by-an-antipyrine-derivative-in-aqueous-and-%C3%AE-cyclodextrin-media-selectivity-tuning-by-%C3%AE-cyclodextrin
#14
Govindaraj Tamil Selvan, Sumathi Poomalai, Sivaraj Ramasamy, Paulraj Mosae Selvakumar, Israel V Muthu Vijayan Enoch, Sara Gracia Lanas, Andrea Melchior
β-Cyclodextrin (β-CD) is a nontoxic cyclic oligosachcharide that can encapsulate all or part of organic molecules of appropriate size and specific shape through noncovalent interaction. Herein, we report the influence of β-CD complex formation of an antipyrine derivative on its metal ion sensing behavior. In aqueous solution, the antipyrine shows a turn-on fluorescence sensing of vanadyl ion, and in cyclodextrin medium it senses aluminum ion. The compound shows an unusual fluorescence quenching on binding with β-cyclodextrin (log KSV = 2...
November 9, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/30405064/active-food-packaging-coatings-based-on-hybrid-electrospun-gliadin-nanofibers-containing-ferulic-acid-hydroxypropyl-beta-cyclodextrin-inclusion-complexes
#15
Niloufar Sharif, Mohammad-Taghi Golmakani, Mehrdad Niakousari, Seyed Mohammad Hashem Hosseini, Behrouz Ghorani, Amparo Lopez-Rubio
In this work, hybrid gliadin electrospun fibers containing inclusion complexes of ferulic acid (FA) with hydroxypropyl-beta-cyclodextrins (FA/HP-β-CD-IC) were prepared as a strategy to increase the stability and solubility of the antioxidant FA. Inclusion complex formation between FA and HP-β-CD was confirmed by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), and X-ray diffraction (XRD). After adjusting the electrospinning conditions, beaded-free fibers of gliadin incorporating FA/HP-β-CD-IC with average fiber diameters ranging from 269...
November 7, 2018: Nanomaterials
https://www.readbyqxmd.com/read/30404135/immobilized-cells-of-bacillus-circulans-atcc-21783-on-palm-curtain-for-fermentation-in-5-l-fermentation-tanks
#16
Jinpeng Wang, Yao Hu, Chao Qiu, Haoran Fan, Yan Yue, Aiquan Jiao, Xueming Xu, Zhengyu Jin
Palm curtain was selected as carrier to immobilize Bacillus circulans ATCC 21783 to produce β-cyclodextrin (β-CD). The influence for immobilization to CGTase activity was analyzed to determine the operation stability. 83.5% cyclodextrin glycosyltransferases (CGTase) of the 1st cycle could be produced in the 7th cycle for immobilized cells, while only 28.90% CGTase was produced with free cells. When palm curtain immobilized cells were reused at the 2th cycle, enzyme activities were increased from 5003 to 5132 U/mL, which was mainly due to physical adsorption of cells on palm curtain with special concave surface structure...
November 6, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30400310/%C3%AE-cyclodextrin-does-not-alter-the-bioaccessibility-and-the-uptake-by-caco-2-cells-of-olive-by-product-phenolic-compounds
#17
Aurélia Malapert, Valérie Tomao, Marielle Margier, Marion Nowicki, Béatrice Gleize, Olivier Dangles, Emmanuelle Reboul
Alperujo-a two-phase olive mill waste that is composed of olive vegetation water and solid skin, pulp, and seed fragments - is a highly valuable olive by-product due to its high content in phenolic compounds. In this study, we assessed whether β-cyclodextrin (β-CD), which is used to extract and protect alpejuro phenolic compounds (hydroxytyrosol- O -glucoside, tyrosol, caffeic, and p -coumaric acids) could impact on their bioaccessibility (i.e., the percentage of molecule found in the aqueous phase of the digesta) and uptake by intestinal cells, by using an in vitro digestion model and Caco-2 TC7 cells in culture, respectively...
November 3, 2018: Nutrients
https://www.readbyqxmd.com/read/30390591/a-versatile-%C3%AE-cyclodextrin-and-polyethyleneimine-bi-functionalized-magnetic-nanoadsorbent-for-simultaneous-capture-of-methyl-orange-and-pb-ii-from-complex-wastewater
#18
Bo Chen, Sijiang Chen, Huinan Zhao, Yang Liu, Fengxia Long, Xuejun Pan
Ascribing to their significant differences in physicochemical properties, it is extremely challenging to treat complex wastewater containing more than one class of pollutants via one-step treatment. Here, we focused on disposal of complex wastewater bearing organic dye and heavy metal by using adsorptive method. Thus, by combining the advantages of polyethyleneimine (PEI), β-cyclodextrin (β-CD) as well as Fe3 O4 magnetic nanoparticles, a versatile β-CD and PEI bi-functionalized magnetic nanoadsorbent (Fe3 O4 -PEI/β-CD) with spatially separated sorption sites was successfully constructed for simultaneous capture of methyl orange (MO) and Pb(II) in complex wastewater...
February 2019: Chemosphere
https://www.readbyqxmd.com/read/30387770/elucidation-of-the-mechanism-of-interaction-between-klebsiella-pneumoniae-pullulanase-and-cyclodextrin
#19
Naoki Saka, Hiroyuki Iwamoto, Dominggus Malle, Nobuyuki Takahashi, Kimihiko Mizutani, Bunzo Mikami
Crystal structures of Klebsiella pneumoniae pullulanase (KPP) in complex with α-cyclodextrin (α-CD), β-cyclodextrin (β-CD) and γ-cyclodextrin (γ-CD) were refined at around 1.98-2.59 Å resolution from data collected at SPring-8. In the structures of the complexes obtained with 1 mM α-CD or γ-CD, one molecule of CD was found at carbohydrate-binding module 41 only (CBM41). In the structures of the complexes obtained with 1 mM β-CD or with 10 mM α-CD or γ-CD, two molecules of CD were found at CBM41 and in the active-site cleft, where the hydrophobic residue of Phe746 occupies the inside cavity of the CD rings...
November 1, 2018: Acta Crystallographica. Section D, Structural Biology
https://www.readbyqxmd.com/read/30381223/influence-of-cyclodextrins-on-the-gel-properties-of-kappa-carrageenan
#20
Chao Yuan, Luyuan Sang, Yanli Wang, Bo Cui
The influence of cyclodextrins (CDs) on the rheological and structural properties of κ-carrageenan (κ-CA) gel was investigated. Gelling temperature (Tg ) of κ-CA was improved by CDs present in the system. Variation of the Herschel-Bulkley model parameters indicates that the addition of CDs increases plasticity of the κ-CA sol. Scanning electronic micrographs show that networks of κ-CA become flat and firm after CDs were added. κ-CA gel containing methyl-β-CD shows the most uniform and fine network structure...
November 15, 2018: Food Chemistry
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