1
|
Song S, Wang L, Xie G, Qu Y, Li H, Wang H, Han P, Tao X. Different Dissolution Molecular Pathways of Azilsartan Crystals with Different Forms Revealed by In Situ Atomic Force Microscopy. J Phys Chem Lett 2023; 14:8191-8198. [PMID: 37671935 DOI: 10.1021/acs.jpclett.3c02111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Here, using in situ atomic force microscopy (AFM), the dissolution behaviors and dissolution molecular pathways of two azilsartan crystals, the isopropanol solvate (AZ-IPA), and form I (AZ-I), in pure water and 6-30% poly(ethylene glycol) (PEG) aqueous solutions are revealed. The dissolution behaviors of step retreat and etch pit formation are observed on the (100) faces of the two crystals, with a single step corresponding to one molecular monolayer in crystal structures. Etching rates of pits increase with PEG concentration. Furthermore, our results show that AZ-IPA dissolves by the direct detachment of molecules from the step front to solution. Such a mechanism remains even when the PEG concentration changes. However, AZ-I dissolves primarily by the surface diffusion mechanism involving molecular detachment from the step front at first and then diffusion over the terraces before desorption into solution. PEG promotes the dissolution of AZ-I crystals by favoring the molecular detachment from the step front.
Collapse
Affiliation(s)
- Shuhong Song
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Lei Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Guanying Xie
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yaqian Qu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Huimin Li
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Hongshuai Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Peizhuo Han
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Xutang Tao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| |
Collapse
|
2
|
5-Fluorouracil-Immobilized Hyaluronic Acid Hydrogel Arrays on an Electrospun Bilayer Membrane as a Drug Patch. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 9:bioengineering9120742. [PMID: 36550948 PMCID: PMC9774285 DOI: 10.3390/bioengineering9120742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022]
Abstract
The hyaluronic acid (HA) hydrogel array was employed for immobilization of 5-fluorouracil (5-FU), and the electrospun bilayer (hydrophilic: polyurethane/pluronic F-127 and hydrophobic: polyurethane) membrane was used to support the HA hydrogel array as a patch. To visualize the drug propagating phenomenon into tissues, we experimentally investigated how FITC-BSA diffused into the tissue by applying hydrogel patches to porcine tissue samples. The diffusive phenomenon basically depends on the FITC-BSA diffusion coefficient in the hydrogel, and the degree of diffusion of FITC-BSA may be affected by the concentration of HA hydrogel, which demonstrates that the high density of HA hydrogel inhibits the diffusive FITC-BSA migration toward the low concentration region. YD-10B cells were employed to investigate the release of 5-FU from the HA array on the bilayer membrane. In the control group, YD-10B cell viability was over 98% after 3 days. However, in the 5-FU-immobilized HA hydrogel array, most of the YD-10B cells were not attached to the bilayer membrane used as a scaffold. These results suggest that 5-FU was locally released and initiated the death of the YD-10B cells. Our results show that 5-FU immobilized on HA arrays significantly reduces YD-10B cell adhesion and proliferation, affecting cells even early in the cell culture. Our results suggest that when 5-FU is immobilized in the HA hydrogel array on the bilayer membrane as a drug patch, it is possible to control the drug concentration, to release it continuously, and that the patch can be applied locally to the targeted tumor site and administer the drug in a time-stable manner. Therefore, the developed bilayer membrane-based HA hydrogel array patch can be considered for sustained release of the drug in biomedical applications.
Collapse
|
3
|
Liu F, Zhou Y, Liu L, Pan H, Liu H. Effect of 2-ethylbutyric acid on thermodynamics stability of various nonionic surfactants tanshione-loaded micelles. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
4
|
Pittol V, Veras KS, Kaiser S, Danielli LJ, Fuentefria AM, Ortega GG. Poloxamer-enhanced solubility of griseofulvin and its related antifungal activity against Trichophyton spp. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
5
|
da Silva JB, Dos Santos RS, da Silva MB, Braga G, Cook MT, Bruschi ML. Interaction between mucoadhesive cellulose derivatives and Pluronic F127: Investigation on the micelle structure and mucoadhesive performance. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 119:111643. [PMID: 33321681 DOI: 10.1016/j.msec.2020.111643] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/15/2020] [Accepted: 10/15/2020] [Indexed: 01/10/2023]
Abstract
Systems composed of bioadhesive and thermoresponsive polymers can combine in situ gelation with bio/mucoadhesion, enhancing retention of topically applied drugs. The effect of bioadhesive sodium carboxymethylcellulose (NaCMC) and hydroxypropyl methylcellulose cellulose (HPMC) on the properties of thermoresponsive Pluronic® F127 (F127) was explored, including micellization and the mucoadhesion. A computational analysis between these polymers and their molecular interactions were also studied, rationalising the design of improved binary polymeric systems for pharmaceutical and biomedical applications. The morphological characterization of polymeric systems was conducted by SEM. DSC analysis was used to investigate the crystallization and micellization enthalpy of F127 and the mixed systems. Micelle size measurements and TEM micrographs allowed for investigation into the interference of cellulose derivatives on F127 micellization. Both cellulose derivatives reduced the critical micellar concentration and enthalpy of micellization of F127, altering hydrodynamic diameters of the aggregates. Mucoadhesion performance was useful to select the best systems for mucosal application. The systems composed of 17.5% (w/w) F127 and 3% (w/w) HPMC or 1% (w/w) NaCMC are promising as topical drug delivery systems, mainly on mucosal surfaces. They were biocompatible when tested against Artemia salina, and also able to release a model of hydrophilic drug in a controlled manner.
Collapse
Affiliation(s)
- Jéssica Bassi da Silva
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringa, Maringa, PR, Brazil
| | - Rafaela Said Dos Santos
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringa, Maringa, PR, Brazil
| | | | - Gustavo Braga
- Department of Chemistry, State University of Maringa, Maringa, Brazil
| | - Michael Thomas Cook
- Research Centre in Topical Drug Delivery and Toxicology, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, United Kingdom
| | - Marcos Luciano Bruschi
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringa, Maringa, PR, Brazil.
| |
Collapse
|
6
|
Mohamed MI, Al-Mahallawi AM, Awadalla SM. Development and optimization of osmotically controlled drug delivery system for poorly aqueous soluble diacerein to improve its bioavailability. Drug Dev Ind Pharm 2020; 46:814-825. [DOI: 10.1080/03639045.2020.1757696] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Magdy I. Mohamed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Abdulaziz M. Al-Mahallawi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, October University for Modern Science and Arts (MSA), Giza, Egypt
| | - Sami M. Awadalla
- Department of Pharmaceutics, Faculty of Pharmacy, Khartoum University, Khartoum, Sudan
| |
Collapse
|
7
|
Wani RJ, Sharma P, Zhong HA, Chauhan H. Preparation and Characterization of Griseofulvin Solid Dispersions. Assay Drug Dev Technol 2020; 18:109-118. [DOI: 10.1089/adt.2019.965] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Rajvi J. Wani
- College of Education and Human Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Puneet Sharma
- Glaxosmithkline Consumer Healthcare, Lincoln, Nebraska, USA
| | - H. Andy Zhong
- Department of Chemistry, University of Nebraska Omaha, Omaha, Nebraska, USA
| | - Harsh Chauhan
- School of Pharmacy and Health Professionals, Creighton University, Omaha, Nebraska, USA
| |
Collapse
|
8
|
Khan AO, Di Maio A, Guggenheim EJ, Chetwynd AJ, Pencross D, Tang S, Belinga-Desaunay MFA, Thomas SG, Rappoport JZ, Lynch I. Surface Chemistry-Dependent Evolution of the Nanomaterial Corona on TiO 2 Nanomaterials Following Uptake and Sub-Cellular Localization. NANOMATERIALS 2020; 10:nano10030401. [PMID: 32106393 PMCID: PMC7152854 DOI: 10.3390/nano10030401] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 02/20/2020] [Accepted: 02/20/2020] [Indexed: 12/14/2022]
Abstract
Nanomaterial (NM) surface chemistry has an established and significant effect on interactions at the nano-bio interface, with important toxicological consequences for manufactured NMs, as well as potent effects on the pharmacokinetics and efficacy of nano-therapies. In this work, the effects of different surface modifications (PVP, Dispex AA4040, and Pluronic F127) on the uptake, cellular distribution, and degradation of titanium dioxide NMs (TiO2 NMs, ~10 nm core size) are assessed and correlated with the localization of fluorescently-labeled serum proteins forming their coronas. Imaging approaches with an increasing spatial resolution, including automated high throughput live cell imaging, correlative confocal fluorescence and reflectance microscopy, and dSTORM super-resolution microscopy, are used to explore the cellular fate of these NMs and their associated serum proteins. Uncoated TiO2 NMs demonstrate a rapid loss of corona proteins, while surface coating results in the retention of the corona signal after internalization for at least 24 h (varying with coating composition). Imaging with two-color super-resolution dSTORM revealed that the apparent TiO2 NM single agglomerates observed in diffraction-limited confocal microscopy are actually adjacent smaller agglomerates, and provides novel insights into the spatial arrangement of the initial and exchanged coronas adsorbed at the NM surfaces.
Collapse
Affiliation(s)
- Abdullah O. Khan
- Institute of Cardiovascular Science, College of Medical Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (A.O.K.); (D.P.); (S.G.T.)
| | - Alessandro Di Maio
- School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK;
| | - Emily J. Guggenheim
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (E.J.G.); (A.J.C.); (M.-F.A.B.-D.)
| | - Andrew J. Chetwynd
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (E.J.G.); (A.J.C.); (M.-F.A.B.-D.)
| | - Dan Pencross
- Institute of Cardiovascular Science, College of Medical Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (A.O.K.); (D.P.); (S.G.T.)
| | - Selina Tang
- Promethean Particles Ltd., 1-3 Genesis Park, Midland Way, Nottingham NG7 3EF, UK;
| | - Marie-France A. Belinga-Desaunay
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (E.J.G.); (A.J.C.); (M.-F.A.B.-D.)
| | - Steven G. Thomas
- Institute of Cardiovascular Science, College of Medical Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (A.O.K.); (D.P.); (S.G.T.)
| | - Joshua Z. Rappoport
- Boston College, Higgins 644A, 140 Commonwealth Ave, Chestnut Hill, MA 02467, USA
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK; (E.J.G.); (A.J.C.); (M.-F.A.B.-D.)
- Correspondence:
| |
Collapse
|
9
|
|
10
|
Cui Y, Meng Y, Wang Z, Wang C, Liu G, Martins R, Fortunato E, Shan F. High performance electronic devices based on nanofibers via a crosslinking welding process. NANOSCALE 2018; 10:19427-19434. [PMID: 30310899 DOI: 10.1039/c8nr05420g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recently, metal oxide nanofibers fabricated by electrospinning have been considered as promising components for next-generation electronic devices. Unfortunately, the nanofiber-based electronic devices usually exhibited inferior electrical performance, due to the high contact resistance between the nanofibers and the inferior interfacial adhesion between the nanofibers and the substrate. In this report, an amine-hardened epoxy resin was selected as an adhesion agent to weld nanofiber junctions and improve the interfacial adhesion performance. It was confirmed that the physical properties of the nanofibers were greatly improved after the crosslinking welding process. Taking advantage of the welding process, field-effect transistors (FETs) based on In2O3 nanofiber networks (NFNs) with various nanofiber densities were integrated and investigated. It was found that the FETs based on In2O3 NFNs with a nanofiber density of 0.4 μm-1 exhibited the optimal electrical performance. When high-k ZrOx was integrated into the FETs as the dielectric layer, the FETs based on In2O3 NFNs/ZrOx exhibited superior performance, including a μFE of 13.2 cm2 V-1 s-1, an Ion/Ioff of 107, and an SS of 90 mV per decade. The crosslinking welding process is a simple, versatile and low-cost technique, which has great possibility for various applications.
Collapse
Affiliation(s)
- Youchao Cui
- College of Physics, Qingdao University, Qingdao 266071, China.
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Volkova TV, Domanina EN, Kumeev RS, Proshin AN, Terekhova IV. The effect of different polymers on the solubility, permeability and distribution of poor soluble 1,2,4-thiadiazole derivative. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
12
|
Guo M, Wang K, Qiao N, Yardley V, Li M. Investigating Permeation Behavior of Flufenamic Acid Cocrystals Using a Dissolution and Permeation System. Mol Pharm 2018; 15:4257-4272. [PMID: 30080976 DOI: 10.1021/acs.molpharmaceut.8b00670] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The dissolution and permeation of the cocrystals, flufenamic acid-nicotinamide (FFA-NIC) and flufenamic acid-theophylline (FFA-TP), have been investigated in the presence of two polymers, polyvinylpyrrolidone (PVP) and copolymer of vinylpyrrolidone/vinyl acetate (PVP-VA), using a dissolution/permeation (D/P) system. It showed that the types and concentrations of the polymers and their interactions with the coformers had significant effects on the dissolution and permeation of the FFA cocrystals. The role of PVP as a stabilizing agent was not altered in spite of its interaction with the coformer of NIC or TP, which was supported by the proportional flux rate of FFA to the dissolution performance parameter (DPP). With an appropriate PVP concentration, the maximal flux rate of FFA could be obtained for a given FFA cocrystal. The situation was complicated in the presence of PVP-VA. The role of PVP-VA could change because of its association with the coformers, i.e., from a stabilizing agent to a solubilization agent. In addition, PVP-VA reduced the flux rate of FFA, in contrast to its DPP for FFA cocrystals. Finally, 1H NMR provided evidence regarding the molecular interactions between FFA, coformers, and polymers at the atomic level and gave insight into the mechanism underlying the supersaturated solution and subsequent permeation behavior of the cocrystals.
Collapse
Affiliation(s)
- Minshan Guo
- School of Pharmacy , De Montfort University , Leicester LE1 9BH , U.K
| | - Ke Wang
- School of Pharmacy , De Montfort University , Leicester LE1 9BH , U.K
| | - Ning Qiao
- College of Materials Science and Engineering , North China University of Science and Technology , Tangshan 063210 , Hebei , China
| | - Vanessa Yardley
- Department of Infection & Immunity, Faculty of Infectious & Tropical Diseases , London School of Hygiene and Tropical Medicine , Keppel Street , London WC1E 7HT , U.K
| | - Mingzhong Li
- School of Pharmacy , De Montfort University , Leicester LE1 9BH , U.K
| |
Collapse
|
13
|
Xu H, Yang P, Ma H, Yin W, Wu X, Wang H, Xu D, Zhang X. Amphiphilic block copolymers-based mixed micelles for noninvasive drug delivery. Drug Deliv 2016; 23:3063-3071. [PMID: 26926462 DOI: 10.3109/10717544.2016.1149743] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Hongyan Xu
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Peimin Yang
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Haifeng Ma
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Weidong Yin
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Xiangxia Wu
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Hui Wang
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Dongmei Xu
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| | - Xia Zhang
- Department of Pharmacy, People’s Hospital of Linzi District, Linzi, China
| |
Collapse
|
14
|
pH induced tuning of size, charge and viscoelastic behavior of aqueous micellar solution of Pluronic ® P104–anthranilic acid mixtures: A scattering, rheology and NMR study. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
15
|
Li F, Yang X, Yang Y, Li P, Yang Z, Zhang C. Phospholipid complex as an approach for bioavailability enhancement of echinacoside. Drug Dev Ind Pharm 2015; 41:1777-84. [PMID: 25686726 DOI: 10.3109/03639045.2015.1004183] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT Echinacoside (ECH) has been shown to possess a multitude of pharmacological activities, however, oral administered ECH failed to fulfill its therapeutic potential due to poor absorption and low bioavailability. Thus, there is a pressing need to develop a new oral dosage form to enhance its intestinal absorption and improve bioavailability. OBJECTIVE The aim of this study was to formulate ECH into phospholipid complex (phytosome, PHY) to enhance intestinal absorption and oral bioavailability of ECH in vivo. METHODS The PHY was prepared by a solvent evaporation method and was characterized by differential scanning calorimetry (DSC) and infrared spectroscopy (IR), and then the physicochemical properties, intestinal absorption and bioavailability of the PHY were investigated. RESULTS Compared with the physical mixture (MIX) or ECH alone, the n-octanol/water partition coefficient (P) determination results showed that the lipophilicity of ECH was significantly enhanced by formation of PHY. Accordingly, the intestinal absorption rate (Ka) was improved to 2.82-fold and the effective permeability coefficient (Peff) increased to 3.39-fold. The concentrations of ECH in rat plasma at different times after oral administration of PHY were determined by HPLC. Pharmacokinetic parameters of the PHY in rats were Tmax = 1.500 h, Cmax = 3.170 mg/mL, AUC0-∞ = 9.375 mg/L h and AUC0-24 = 7.712 mg/L h, respectively. CONCLUSIONS Compared with ECH alone or the MIX group, the relative bioavailability of ECH was increased significantly after formulation into PHY (p < 0.05). This might be mainly due to an improvement of the absorption of PHY.
Collapse
Affiliation(s)
- Fei Li
- a State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , P R China
| | - Xiaolin Yang
- b Key Laboratory of Pharmaceutical and Biological Marine Resources Research and Development of Jiangsu Province, Nanjing University of Chinese Medicine , Nanjing , PR China , and
| | - Yanan Yang
- c R & D Division, Amphastar Nanjing Pharmaceuticals Inc. , Nanjing , PR China
| | - Ping Li
- a State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , P R China
| | - Zhonglin Yang
- a State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , P R China
| | - Chunfeng Zhang
- a State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing , P R China
| |
Collapse
|
16
|
Moretton MA, Cohen L, Lepera L, Bernabeu E, Taira C, Höcht C, Chiappetta DA. Enhanced oral bioavailability of nevirapine within micellar nanocarriers compared with Viramune ®. Colloids Surf B Biointerfaces 2014; 122:56-65. [DOI: 10.1016/j.colsurfb.2014.06.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/25/2014] [Accepted: 06/20/2014] [Indexed: 01/28/2023]
|
17
|
Quantification of in situ granulation-induced changes in pre-compression, solubility, dose distribution and intrinsic in vitro release characteristics of ibuprofen–cationic dextran conjugate crystanules. Int J Pharm 2014; 471:453-77. [DOI: 10.1016/j.ijpharm.2014.05.053] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 05/23/2014] [Accepted: 05/28/2014] [Indexed: 11/22/2022]
|
18
|
Dey J, Kumar S, Nath S, Ganguly R, Aswal V, Ismail K. Additive induced core and corona specific dehydration and ensuing growth and interaction of Pluronic F127 micelles. J Colloid Interface Sci 2014; 415:95-102. [DOI: 10.1016/j.jcis.2013.10.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 10/04/2013] [Accepted: 10/05/2013] [Indexed: 11/29/2022]
|
19
|
Dong F, Xie Y, Qi J, Hu F, Lu Y, Li S, Wu W. Bile salt/phospholipid mixed micelle precursor pellets prepared by fluid-bed coating. Int J Nanomedicine 2013; 8:1653-63. [PMID: 23641154 PMCID: PMC3639718 DOI: 10.2147/ijn.s42349] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bile salt/phospholipid mixed micelles (MMs) are potent carriers used for oral absorption of drugs that are poorly soluble in water; however, there are many limitations associated with liquid formulations. In the current study, the feasibility of preparing bile salt/phospholipid MM precursor (preMM) pellets with high oral bioavailability, using fluid-bed coating technology, was examined. In this study, fenofibrate (FB) and sodium deoxycholate (SDC) were used as the model drug and the bile salt, respectively. To prepare the MMs and to serve as the micellular carrier, a weight ratio of 4:6 was selected for the sodium deoxycholate/phospholipids based on the ternary phase diagram. Polyethylene glycol (PEG) 6000 was selected as the dispersion matrix for precipitation of the MMs onto pellets, since it can enhance the solubilizing ability of the MMs. Coating of the MMs onto the pellets using the fluid-bed coating technology was efficient and the pellets were spherical and intact. MMs could be easily reconstituted from preMM pellets in water. Although they existed in a crystalline state in the preMM pellets, FB could be encapsulated into the reconstituted MMs, and the MMs were redispersed better than solid dispersion pellets (FB:PEG = 1:3) and Lipanthyl®. The redispersibility of the preMM pellets increased with the increase of the FB/PEG/micellar carrier. PreMM pellets with a FB:PEG:micellar carrier ratio of 1:1.5:1.5 showed 284% and 145% bioavailability relative to Lipanthyl® and solid dispersion pellets (FB:PEG = 1:3), respectively. Fluid-bed coating technology has considerable potential for use in preparing sodium deoxycholate/phospholipid preMM pellets, with enhanced oral bioavailability for poorly water-soluble drugs.
Collapse
Affiliation(s)
- Fuxia Dong
- School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery of Ministry of Education and PLA, Shanghai, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
20
|
Wills PW, Lopez SG, Burr J, Taboada P, Yeates SG. Segregation in like-charged polyelectrolyte-surfactant mixtures can be precisely tuned via manipulation of the surfactant mass ratio. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:4434-4440. [PMID: 23461786 DOI: 10.1021/la400130x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, we consider segregative phase separation in aqueous mixtures of quaternary ammonium surfactants didecyldimethylammonium chloride (DDQ) and alkyl (C12, 70%; C14 30%) dimethyl benzyl ammonium chloride (BAC) upon the addition of poly(diallyldimethylammonium) chloride (pDADMAC) as a function of both concentration and molecular weight. The nature of the surfactant type is dominant in determining the concentration at which separation into an upper essentially surfactant-rich phase and lower polyelectrolyte-rich phase is observed. However, for high-molecular-weight pDADMAC there is a clear indication of an additional depletion flocculation effect. When the BAC/DDQ ratio is tuned, the segregative phase separation point can be precisely controlled. We propose a phase separation mechanism for like-charged quaternary ammonium polyelectrolyte/surfactant/water mixtures induced by a reduction in the ionic atmosphere around the surfactant headgroup and possible ion pair formation. An additional polyelectrolyte-induced depletion flocculation effect was also observed.
Collapse
Affiliation(s)
- Peter W Wills
- School of Chemistry, The University of Manchester, Manchester, UK
| | | | | | | | | |
Collapse
|
21
|
Formulation and in vitro absorption analysis of Rhizoma paridis steroidal saponins. Int J Pharm 2012; 441:680-6. [PMID: 23107795 DOI: 10.1016/j.ijpharm.2012.10.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 10/13/2012] [Accepted: 10/19/2012] [Indexed: 11/21/2022]
Abstract
Rhizoma paridis steroidal saponins (RPS) have been prepared and identified as the active compounds for antitumor activity in our previous study. However, the low oral bioavailability of the steroidal saponins restricted its using. In the present research, solid dispersion (SD) and phytosome (PHY) formulation of RPS were prepared, and the physicochemical parameters as well as the intestinal absorption in rat everted gut sac model were investigated. Seven agents were selected as the carriers of SD, and poloxamer 407 (P 407) was the most suitable one. SD reduced the particle size of saponins in the water solution, enhanced the solubility of the saponins by about 3.5 folds, and significantly improved the absorption transport of saponins from 48 to 104 μg in everted gut sac of the rat system. PHY significantly enhanced the hydrophilic of saponins but showed little effect on the absorption in small intestine. Jejunum and ileum part absorbed more absolute contents of total saponins than duodenum parts. Six saponins, the main contents of RPS, used as the index of comparing the three forms, were also further investigated in the physico-chemical properties and the absorption tests. n-Octanol/water partition coefficients of the six saponins ordered in RPS, SD and PHY were Chonglouoside H>Dioscin>Polyphyllin D>Gracillin>Paris-VII>Formosanin C. All the saponins possessed the higher absorptive characteristics in SD formulation. The absorption rate of diosgenyl saponins in intestine was more than the pennogenyl saponins.
Collapse
|
22
|
Ribeiro ME, de Moura CL, Vieira MG, Gramosa NV, Chaibundit C, de Mattos MC, Attwood D, Yeates SG, Nixon SK, Ricardo NM. Solubilisation capacity of Brij surfactants. Int J Pharm 2012; 436:631-5. [DOI: 10.1016/j.ijpharm.2012.07.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/17/2012] [Accepted: 07/19/2012] [Indexed: 10/28/2022]
|
23
|
Ricardo NM, Ricardo NM, Costa FDM, Bezerra FW, Chaibundit C, Hermida-Merino D, Greenland BW, Burattini S, Hamley IW, Keith Nixon S, Yeates SG. Effect of water-soluble polymers, polyethylene glycol and poly(vinylpyrrolidone), on the gelation of aqueous micellar solutions of Pluronic copolymer F127. J Colloid Interface Sci 2012; 368:336-41. [DOI: 10.1016/j.jcis.2011.10.062] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 10/25/2011] [Accepted: 10/28/2011] [Indexed: 10/15/2022]
|