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Samsoen S, Dudognon É, Le Fer G, Fournier D, Woisel P, Affouard F. Impact of the polymer dispersity on the properties of curcumin/polyvinylpyrrolidone amorphous solid dispersions. Int J Pharm 2024; 653:123895. [PMID: 38346598 DOI: 10.1016/j.ijpharm.2024.123895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/20/2024] [Accepted: 02/07/2024] [Indexed: 02/19/2024]
Abstract
Amorphous solid dispersions (ASD) are known to enhance the absorption of poorly water-soluble drugs. In this work we synthesise well-defined Polyvinylpyrrolidone (PVP) to establish the impact of dispersity and chain-end functionality on the physical properties of Curcumin (CUR)/PVP ASD. Thermodynamic characterisation of synthesised PVP emphasises a strong effect of the dispersity on the glass transition temperature (Tg), 50 °C higher for synthesised PVP than for commercial PVP K12 of same molar mass. This increase of Tg affects the thermodynamic properties of CUR/PVP ASD successfully formulated up to 70 wt% of CUR by milling or solvent evaporation. The evolution of both the Tg and CUR solubility values versus CUR content points out the development of fairly strong CUR-PVP interactions that strengthen the antiplasticising effect of PVP on the Tg of ASD. However, for ASD formulated with commercial PVP this effect is counterbalanced at low CUR content by a plasticising effect due to the shortest PVP chains. Moreover, the overlay of the phase and state diagrams highlights the strong impact of the polymer dispersity on the stability of CUR/PVP ASD. ASD formulated with low dispersity PVP are stable on larger temperature and concentration ranges than those formulated with PVP K12.
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Affiliation(s)
- Simon Samsoen
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000, Lille, France
| | - Émeline Dudognon
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000, Lille, France.
| | - Gaëlle Le Fer
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000, Lille, France.
| | - David Fournier
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000, Lille, France
| | - Patrice Woisel
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000, Lille, France
| | - Frédéric Affouard
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000, Lille, France
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2
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Raparla S, Lampa C, Li X, Jasti BR. An empirical predictive model for determining the aqueous solubility of BCS class IV drugs in amorphous solid dispersions. Drug Dev Ind Pharm 2024; 50:236-247. [PMID: 38318700 DOI: 10.1080/03639045.2024.2315477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 02/02/2024] [Indexed: 02/07/2024]
Abstract
CONTEXT Determining solubility of drugs is laborious and time-consuming process that may not yield meaningful results. Amorphous solid dispersion (ASD) is a widely used solubility enhancement technique. Predictive models could streamline this process and accelerate the development of oral drugs with improved aqueous solubilities. OBJECTIVE This study aimed to develop a predictive model to estimate the solubility of a compound from the ASDs in polymer matrices. METHODS ASDs of model drugs (acetazolamide, chlorothiazide, furosemide, hydrochlorothiazide, sulfamethoxazole) with model polymers (PVP, PVPVA, HPMC E5, Soluplus) and a surfactant (TPGS) were prepared using hotmelt process. The prepared ASDs were characterized using DSC, FTIR, and XRD. The aqueous solubility of the model drugs was determined using shake-flask method. Multiple linear regression was used to develop a predictive model to determine aqueous solubility using the molecular descriptors of the drug and polymer as predictor variables. The model was validated using Leave-One-Out Cross-Validation. RESULTS The ASDs' drug components were identified as amorphous via DSC and XRD Studies. There were no significant chemical interactions between the model drugs and the polymers based on FTIR studies. The ASDs showed a significant (p < 0.05) improvement in solubility, ranging from a 3-fold to 118-fold, compared with the pure drug. The developed empirical model predicted the solubility of the model drugs from the ASDs containing model polymer matrices with an accuracy greater than 80%. CONCLUSION The developed empirical model demonstrated robustness and predicted the aqueous solubility of model drugs from the ASDs of model polymer matrices with an accuracy greater than 80%.
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Affiliation(s)
- Sridivya Raparla
- Department of Medicinal chemistry and pharmaceutics, Thomas J. long School of Pharmacy, University of the Pacific, Stockton, CA, USA
| | - Charina Lampa
- Department of Medicinal chemistry and pharmaceutics, Thomas J. long School of Pharmacy, University of the Pacific, Stockton, CA, USA
| | - Xiaoling Li
- Department of Medicinal chemistry and pharmaceutics, Thomas J. long School of Pharmacy, University of the Pacific, Stockton, CA, USA
| | - Bhaskara R Jasti
- Department of Medicinal chemistry and pharmaceutics, Thomas J. long School of Pharmacy, University of the Pacific, Stockton, CA, USA
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Tiama TM, Ibrahim MA, Sharaf MH, Mabied AF. Effect of germanium oxide on the structural aspects and bioactivity of bioactive silicate glass. Sci Rep 2023; 13:9582. [PMID: 37311789 DOI: 10.1038/s41598-023-36649-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 06/07/2023] [Indexed: 06/15/2023] Open
Abstract
Ternary silicate glass (69SiO2-27CaO-4P2O5) was synthesized with the sol-gel route, and different percentages of germanium oxide GeO2 (6.25, 12.5, and 25%) and polyacrylic acid (PAA) were added. DFT calculations were performed at the B3LYP/LanL2DZ level of theory for molecular modelling. X-ray powder diffraction (XRPD) was used to study the effect of GeO2/PAA on the structural properties. The samples were further characterized using DSC, ART-FTIR, and mechanical tests. Bioactivity and antibacterial tests were assessed to trace the influence of GeO2 on biocompatibility with biological systems. Modelling results demonstrate that molecular electrostatic potential (MESP) indicated an enhancement of the electronegativity of the studied models. While both the total dipole moment and HOMO/LUMO energy reflect the increased reactivity of the P4O10 molecule. XRPD results confirmed the samples formation and revealed the correlation between the crystallinity and the properties, showing that crystalline hydroxyapatite (HA) is clearly formed in the highest percentages of GeO2, proposing 25% as a strong candidate for medical applications, consistent with the results of mechanical properties and the rest of the characterization results. Simulated body fluid (SBF) in vitro experiments showed promising biocompatibility. The samples showed remarkable antimicrobial and bioactivity, with the strongest effect at 25%. The experimental findings of this study revealed that the incorporation of GeO2 into the glass in terms of structural characteristics, bioactivity, antimicrobial properties, and mechanical properties is advantageous for biomedical fields and especially for dental applications.
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Affiliation(s)
- Taha M Tiama
- Department of Basic Sciences, October High Institute of Engineering & Technology-OHI, 6th of October City, Giza, Egypt
| | - Medhat A Ibrahim
- Molecular Spectroscopy and Modeling Unit, Spectroscopy Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza, 12622, Egypt
| | - Mohamed H Sharaf
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Ahmed F Mabied
- X-Ray Crystallography Lab., Solid State Physics Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza, 12622, Egypt.
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Kim P, Lee IS, Kim JY, Lee MJ, Choi GJ. Amorphous solid dispersions of tegoprazan and three different polymers: In vitro/in vivo evaluation of physicochemical properties. KOREAN J CHEM ENG 2023. [DOI: 10.1007/s11814-022-1280-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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5
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Santillán-González B, Duarte-Peña L, Bucio E. Binary Graft of Poly(acrylic acid) and Poly(vinyl pyrrolidone) onto PDMS Films for Load and Release of Ciprofloxacin. Polymers (Basel) 2023; 15:polym15020302. [PMID: 36679182 PMCID: PMC9861813 DOI: 10.3390/polym15020302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
Polymers are versatile compounds which physical and chemical properties can be taken advantage of in wide applications. Particularly, in the biomedical field, polydimethylsiloxane (PDMS) is one of the most used for its high biocompatibility, easy manipulation, thermal, and chemical stability. Nonetheless, its hydrophobic nature makes it susceptible to bacterial pollution, which represents a disadvantage in this field. A potential solution to this is through the graft of stimuli-sensitive polymers that, besides providing hydrophilicity, allow the creation of a drug delivery system. In this research, PDMS was grafted with acrylic acid (AAc) and vinyl pyrrolidone (VP) in two steps using gamma radiation. The resulting material was analyzed by several characterization techniques such as infrared spectroscopy (FTIR), swelling, contact angle, critical pH, and thermogravimetric analysis (TGA), demonstrating the presence of both polymers onto PDMS films and showing hydrophilic and pH-response properties. Among the performed methods to graft, the loading and release of ciprofloxacin were successful in those samples obtained by direct irradiation method. Furthermore, the antimicrobial assays showed zones of inhibition for microorganisms such as Staphylococcus aureus and Escherichia coli.
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Affiliation(s)
- Belén Santillán-González
- División de Ciencias Biológicas y de la Salud, Unidad Xochimilco, Universidad Autónoma Metropolitana, Calzada del Hueso 1100, Col. Villa Quietud, Delegación Coyoacán, Ciudad de México C.P. 04960 CDMX, Mexico
| | - Lorena Duarte-Peña
- Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México C.P. 04510 CDMX, Mexico
- Correspondence: (L.D.-P.); (E.B.)
| | - Emilio Bucio
- Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México C.P. 04510 CDMX, Mexico
- Correspondence: (L.D.-P.); (E.B.)
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Wu Q, Huang Z, Xiao Y, Chang J, Liu P, Liu C, Liu X. Preparation, characterization and pharmacokinetics of Cucurbitacin B solid dispersion. OPENNANO 2022. [DOI: 10.1016/j.onano.2022.100088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Hatanaka Y, Uchiyama H, Kadota K, Tozuka Y. Improved solubility and permeability of both nifedipine and ketoconazole based on coamorphous formation with simultaneous dissolution behavior. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Bhujbal SV, Pathak V, Zemlyanov DY, Taylor LS, Zhou QT. Physical Stability and Dissolution of Lumefantrine Amorphous Solid Dispersions Produced by Spray Anti-Solvent Precipitation. J Pharm Sci 2020; 110:2423-2431. [PMID: 33387599 PMCID: PMC8141512 DOI: 10.1016/j.xphs.2020.12.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/12/2020] [Accepted: 12/14/2020] [Indexed: 11/21/2022]
Abstract
This study aims to develop amorphous solid dispersion (ASD) of lumefantrine with a cost-effective approach of spray anti-solvent precipitation. Four acidic polymers, hydroxypropylmethylcellulose phthalate (HPMCP), hydroxypropylmethylcellulose acetate succinate (HPMCAS), poly(methacrylic acid–ethyl acrylate) (EL100) and cellulose acetate phthalate (CAP) were studied as excipients at various drug-polymer ratios. Of the studied polymers, satisfactory physical stability was demonstrated for HPMCP- and HPMCAS-based ASDs with no observed powder X-ray diffraction peaks for up to 3 months of storage at 40 °C/75% RH. HPMCP and HPMCAS ASDs also achieved greater drug release levels in the dissolution study than other polymers. The HPMCP-based ASDs with a drug:polymer ratio of 2:8 exhibited a maximum drug release of 140 μg/mL for up to 2 h, which is significantly higher than the currently marketed formulation of Coartem® (<80 ng/mL). Relatively, the CAP and EL100 ASDs indicated a higher water content and crystallized within a day when stored at 40 °C/75% RH. The choice of polymer, and the drug-polymer ratio played a crucial role in the solubility enhancement of lumefantrine. Our study indicates that the developed spray anti-solvent precipitation method could be an affordable approach for producing ASDs.
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Affiliation(s)
- Sonal V Bhujbal
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Vaibhav Pathak
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Dmitry Y Zemlyanov
- Birck Nanotechnology Center, Purdue University, 1205 West State Street, West Lafayette, IN 47907, USA
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
| | - Qi Tony Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
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Arioglu-Tuncil S, Voelker AL, Taylor LS, Mauer LJ. Amorphization of Thiamine Mononitrate: A Study of Crystallization Inhibition and Chemical Stability of Thiamine in Thiamine Mononitrate Amorphous Solid Dispersions. Int J Mol Sci 2020; 21:ijms21249370. [PMID: 33316991 PMCID: PMC7763500 DOI: 10.3390/ijms21249370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 11/23/2022] Open
Abstract
This study investigated thiamine degradation in thiamine mononitrate (TMN):polymer solid dispersions, accounting for the physical state of the vitamin and the recrystallization tendency of TMN in these dispersions. Results were compared with those from solid dispersions containing a different salt form of thiamine (thiamine chloride hydrochloride (TClHCl)). TMN:polymer dispersions were prepared by lyophilizing solutions containing TMN and amorphous polymers (pectin and PVP (polyvinylpyrrolidone)). Samples were stored in controlled temperature and relative humidity (RH) environments for eight weeks and monitored periodically by X-ray diffraction and high performance liquid chromatography (HPLC). Moisture sorption, glass transition temperature (Tg), intermolecular interactions, and pH were also determined. Similar to the TClHCl:polymer dispersions, thiamine was more chemically labile in the amorphous state than the crystalline state, when present in lower proportions in amorphous TMN:polymer dispersions despite increasing Tg values, when environmental storage conditions exceeded the Tg of the dispersion, and when co-formulated with PVP compared to pectin. When thiamine remained as an amorphous solid, chemical stability of thiamine did not differ as a function of counterion present (TMN vs. TClHCl). However, storage at 75% RH led to hydration of thiamine:PVP dispersions, and the resulting pH of the solutions as a function of thiamine salt form led to a higher chemical stability in the acidic TClHCl samples than in the neutral TMN samples.
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Affiliation(s)
- Seda Arioglu-Tuncil
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA; (S.A.-T.); (A.L.V.)
| | - Adrienne L. Voelker
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA; (S.A.-T.); (A.L.V.)
| | - Lynne S. Taylor
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA;
| | - Lisa J. Mauer
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA; (S.A.-T.); (A.L.V.)
- Correspondence: ; Tel.: +1-765-494-9111
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10
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Mechanistic Insights of the Critical Role of Hydrogen Donor in Controlling Drug Release From Acrylate Adhesive. J Pharm Sci 2019; 109:1096-1104. [PMID: 31682832 DOI: 10.1016/j.xphs.2019.10.058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/24/2019] [Accepted: 10/28/2019] [Indexed: 11/20/2022]
Abstract
In the present study, a pyrrolidone adhesive and an amide adhesive were synthesized, and their molecular mechanisms of controlled drug release were described. Using zolmitriptan as model drug, in vitro drug release and skin permeation experiments were performed. Adhesive properties were evaluated using modulated differential scanning calorimetry and rheology study. Free volume of polymer was directly obtained by positron annihilation lifetime spectroscopy. Intermolecular interactions between drugs and adhesives were determined by FTIR spectroscopic analysis and molecular simulation. Release percent (24 h) of zolmitriptan from pyrrolidone adhesive was about 55.8 ± 3.1% (w/w), while from amide adhesive, the release percent (24 h) was about 40.1 ± 1.6% (w/w). The free volume sizes of pyrrolidone adhesive and amide adhesive were about 2309.6 Å3 and 2854.5 Å3, respectively, which were much larger than molecular volume of zolmitriptan (about 285.7 Å3). Thus, the polymer networks might not hinder drug diffusion from the view of free volume. Comparing chemical structures of pyrrolidone group and primary amide group, the main difference was that primary amide group of amide adhesive possessed 2 hydrogen donors. It was proved that hydrogen bonding between zolmitriptan and hydrogen donor of primary amide group played a critical role in controlling drug release.
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11
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Aucamp M, Milne M. The physical stability of drugs linked to quality-by-design (QbD) and in-process technology (PAT) perspectives. Eur J Pharm Sci 2019; 139:105057. [PMID: 31470099 DOI: 10.1016/j.ejps.2019.105057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 06/11/2019] [Accepted: 08/25/2019] [Indexed: 11/26/2022]
Abstract
The physical stability of solid-state forms in which drugs may exist is in some sense an overlooked aspect. In an era where strategies such as amorphous solid dispersions or co-amorphous preparations might provide answers to stumbling blocks such as poor drug solubility and bioavailability, the physical stability of such solid-state preparations should be a priority. Furthermore, the pharmaceutical industry is moving towards adapting a real time release of pharmaceutical products strategy, through the utilization of process analytical technology. It is thus becoming imperative to investigate the various types of phase transformations a specific solid-state form of a drug may undergo. Also, to critically assess the applicability of process analytical tools that may be sensitive enough to monitor not only chemical but also physical drug stability. These combined efforts allow quality to be built into the product, rather than dealing with costly post batch release recalls. Given that drug stability is an essential quality attribute for a drug product and the quality-by-design approach (QbD) is a best solution to build quality in all pharmaceutical products we focussed on the critical material attributes (CMAs), specifically relating to the physical stability of any given drug. This review highlights physical drug stability in relation to CMAs and how this ultimately link to the finished pharmaceutical product. Investigated challenges associated current PAT strategies is also discussed.
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Affiliation(s)
- Marique Aucamp
- School of Pharmacy, University of the Western Cape, Bellville, Cape Town 7535, South Africa.
| | - Marnus Milne
- School of Pharmacy, Sefako Makgatho Health Sciences University, Ga-Rankuwa, Pretoria 0204, South Africa
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12
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Kim WS, Kim DW, Koo KK. Effect of a surface-active agent on nucleation kinetics in ultrasound-assisted crystallization of paracetamol. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.05.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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Paudwal G, Rawat N, Gupta R, Baldi A, Singh G, Gupta PN. Recent Advances in Solid Dispersion Technology for Efficient Delivery of Poorly Water-Soluble Drugs. Curr Pharm Des 2019; 25:1524-1535. [DOI: 10.2174/1381612825666190618121553] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/11/2019] [Indexed: 11/22/2022]
Abstract
Drug discovery is generally considered as a costly affair and it takes approximately 15 years to reach a
new chemical entity into the market. Among the recent potent drug molecules with most effective pharmacological
properties, very few reached for Phase I clinical trial in humans. Unfortunately, the historical average reveals
an almost 90% overall attrition rate in clinical trials. The solubility and permeability of a drug are the critical
factors influencing the success of a drug. Oral drug delivery systems still continue to exist as the most favored,
simplest and easiest administration route. A huge number of potential clinical candidates won’t make it to the
market or accomplish their maximum capacity except if their solubility and oral bioavailability are enhanced by
formulation. The solubility of drugs will continue to exist as important aspects of formulation development. With
the emergence of synthetic methods for new molecule synthesis in chemistry and better screening methods, the
number of poorly water soluble compounds has dramatically expanded in the last few years. Solid dispersion is
one of the most important techniques as it can be prepared by several methods. It is mostly prepared with a drug
having poor water solubility and it explores hydrophilic polymers either individually or in combination for the
enhancement of solubility. In comparison to the conventional formulations such as tablets or capsules, there are
different methods with which solid dispersions can be prepared and also have many benefits over conventional
drug delivery approaches. Solid dispersion systems are potential for increasing the solubility, oral absorption and
bioavailability of drugs and the significance of the solid dispersion technology is constantly increasing. The main
focus of this review is to present recent advancements in the area of solid dispersion. This review also includes an
account of recent patents on solid dispersion and clinical status of solid dispersion based formulations.
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Affiliation(s)
- Gourav Paudwal
- PK-PD Toxicology & Formulation Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Neha Rawat
- Department of Pharmacy, Maharaja Ranjit Singh Punjab Technical University, Bathinda, India
| | - Rahul Gupta
- PK-PD Toxicology & Formulation Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Ashish Baldi
- Department of Pharmacy, Maharaja Ranjit Singh Punjab Technical University, Bathinda, India
| | - Gurdarshan Singh
- PK-PD Toxicology & Formulation Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Prem N. Gupta
- PK-PD Toxicology & Formulation Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
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Ishizuka Y, Ueda K, Okada H, Takeda J, Karashima M, Yazawa K, Higashi K, Kawakami K, Ikeda Y, Moribe K. Effect of Drug–Polymer Interactions through Hypromellose Acetate Succinate Substituents on the Physical Stability on Solid Dispersions Studied by Fourier-Transform Infrared and Solid-State Nuclear Magnetic Resonance. Mol Pharm 2019; 16:2785-2794. [DOI: 10.1021/acs.molpharmaceut.9b00301] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuya Ishizuka
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Keisuke Ueda
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hitomi Okada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Junpei Takeda
- Analytical Development, Pharmaceutical Sciences, Takeda Pharmaceutical Company Limited, 2-26-1, Muraoka-Higashi, Fujisawa 251-8555, Kanagawa, Japan
| | - Masatoshi Karashima
- Analytical Development, Pharmaceutical Sciences, Takeda Pharmaceutical Company Limited, 2-26-1, Muraoka-Higashi, Fujisawa 251-8555, Kanagawa, Japan
| | - Koji Yazawa
- JEOL Resonance Incorpation, 3-1-2 Musashino, Akishima 196-8558, Tokyo, Japan
| | - Kenjirou Higashi
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Kohsaku Kawakami
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Yukihiro Ikeda
- Analytical Development, Pharmaceutical Sciences, Takeda Pharmaceutical Company Limited, 2-26-1, Muraoka-Higashi, Fujisawa 251-8555, Kanagawa, Japan
| | - Kunikazu Moribe
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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Di Capua A, Adami R, Cosenza E, Jalaber V, Crampon C, Badens E, Reverchon E. β-Carotene/PVP microspheres produced by Supercritical Assisted Atomization. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.01.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Development of an amorphous nanosuspension by sonoprecipitation-formulation and process optimization using design of experiment methodology. Int J Pharm 2019; 559:348-359. [DOI: 10.1016/j.ijpharm.2019.01.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 11/18/2022]
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17
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Shi X, Hu S, Song S, Ding Z, Sheng X. Selective crystallization of agomelatine from molten state induced by polymer. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Shi NQ, Jin Y, Zhang Y, Che XX, Xiao X, Cui GH, Chen YZ, Feng B, Li ZQ, Qi XR. The Influence of Cellulosic Polymer's Variables on Dissolution/Solubility of Amorphous Felodipine and Crystallization Inhibition from a Supersaturated State. AAPS PharmSciTech 2018; 20:12. [PMID: 30560388 DOI: 10.1208/s12249-018-1266-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 11/27/2018] [Indexed: 12/18/2022] Open
Abstract
The collective impact of cellulosic polymers on the dissolution, solubility, and crystallization inhibition of amorphous active pharmaceutical ingredients (APIs) is still far from being adequately understood. The goal of this research was to explore the influence of cellulosic polymers and incubation conditions on enhancement of solubility and dissolution of amorphous felodipine, while inhibiting crystallization of the drug from a supersaturated state. Variables, including cellulosic polymer type, amount, ionic strength, and viscosity, were evaluated for effects on API dissolution/solubility and crystallization processes. Water-soluble cellulosic polymers, including HPMC E15, HPMC E5, HPMC K100-LV, L-HPC, and MC, were studied. All cellulosic polymers could extend API dissolution and solubility to various extents by delaying crystallization and prolonging supersaturation duration, with their effectiveness ranked from greatest to least as HPMC E15 > HPMC E5 > HPMC K100-LV > L-HPC > MC. Decreased polymer amount, lower ionic strength, or higher polymer viscosity tended to decrease dissolution/solubility and promote crystal growth to accelerate crystallization. HPMC E15 achieved greatest extended API dissolution and maintenance of supersaturation from a supersaturated state; this polymer thus had the greatest potential for maintaining sustainable API absorption within biologically relevant time frames.
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Kawakami K, Bi Y, Yoshihashi Y, Sugano K, Terada K. Time-dependent phase separation of amorphous solid dispersions: Implications for accelerated stability studies. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.05.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Sydykov B, Oldenhof H, Sieme H, Wolkers WF. Storage stability of liposomes stored at elevated subzero temperatures in DMSO/sucrose mixtures. PLoS One 2018; 13:e0199867. [PMID: 29975741 PMCID: PMC6033440 DOI: 10.1371/journal.pone.0199867] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 06/14/2018] [Indexed: 11/18/2022] Open
Abstract
Cryopreservation of biological materials is predominantly done using liquid nitrogen, and its application involves high maintenance costs and the need for periodical refilling of liquid nitrogen. Stable storage in mechanical freezers at −80°C would eliminate these issues and allow for shipment of frozen specimens using dry ice. In this work, the possibility of increasing the storage temperature of cryopreserved samples to −80°C by using combinations of DMSO and sucrose has been studied. Preservation efficacy was studied by measuring stability of liposomes encapsulated with carboxyfluorescein during storage at −150, −80 and −25°C for up to three months. Thermal and molecular mobility properties of the different DMSO-sucrose formulations were measured using differential scanning calorimetry, whereas hydrogen bonding interactions of the formulations were probed by Fourier transform infrared spectroscopy. It was found that addition of sucrose to DMSO solutions increases the Tg, and decreases molecular mobility in the glassy state at a particular temperature. Although it was expected that storage above or close to Tg at −80°C would affect liposome stability, stability was found to be similar compared to that of samples stored at −150°C. Higher molecular mobility in the glassy state could not be associated with faster CF-leakage rates. Distinct differences in storage stability at −25°C, far above Tg, were found among the sucrose/DMSO formulations, which were explained by the differences in permeability of sucrose and DMSO resulting in different levels of osmotic stress in the formulations.
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Affiliation(s)
- Bulat Sydykov
- Institute of Multiphase Processes, Leibniz Universität Hannover, Hannover, Germany
| | - Harriëtte Oldenhof
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Harald Sieme
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Willem F. Wolkers
- Institute of Multiphase Processes, Leibniz Universität Hannover, Hannover, Germany
- * E-mail:
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21
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Antisolvent Recrystallization Strategy to Screen Appropriate Carriers to Stabilize Filgotinib Amorphous Solid Dispersions. J Pharm Sci 2018; 107:1624-1632. [DOI: 10.1016/j.xphs.2018.02.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/16/2018] [Accepted: 02/06/2018] [Indexed: 11/24/2022]
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22
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Fung MH, DeVault M, Kuwata KT, Suryanarayanan R. Drug-Excipient Interactions: Effect on Molecular Mobility and Physical Stability of Ketoconazole–Organic Acid Coamorphous Systems. Mol Pharm 2018; 15:1052-1061. [DOI: 10.1021/acs.molpharmaceut.7b00932] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Michelle H. Fung
- Department of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Marla DeVault
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105, United States
| | - Keith T. Kuwata
- Department of Chemistry, Macalester College, Saint Paul, Minnesota 55105, United States
| | - Raj Suryanarayanan
- Department of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, United States
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23
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Theil F, Milsmann J, Kyeremateng SO, Anantharaman S, Rosenberg J, van Lishaut H. Extraordinary Long-Term-Stability in Kinetically Stabilized Amorphous Solid Dispersions of Fenofibrate. Mol Pharm 2017; 14:4636-4647. [DOI: 10.1021/acs.molpharmaceut.7b00735] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Frank Theil
- AbbVie Deutschland GmbH & Co. KG, 67061 Ludwigshafen, Germany
| | | | | | | | - Jörg Rosenberg
- AbbVie Deutschland GmbH & Co. KG, 67061 Ludwigshafen, Germany
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24
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Arioglu-Tuncil S, Bhardwaj V, Taylor LS, Mauer LJ. Amorphization of thiamine chloride hydrochloride: A study of the crystallization inhibitor properties of different polymers in thiamine chloride hydrochloride amorphous solid dispersions. Food Res Int 2017; 99:363-374. [PMID: 28784494 DOI: 10.1016/j.foodres.2017.05.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 11/20/2022]
Abstract
Amorphous solid dispersions of thiamine chloride hydrochloride (THCl) were created using a variety of polymers with different physicochemical properties in order to investigate how effective the various polymers were as THCl crystallization inhibitors. THCl:polymer dispersions were prepared by lyophilizing solutions of THCl and amorphous polymers (guar gum, pectin, κ-carrageenan, gelatin, and polyvinylpyrrolidone (PVP)). These dispersions were stored at select temperature (25 and 40°C) and relative humidity (0, 23, 32, 54, 75, and 85% RH) conditions and monitored at different time points using powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC). Moisture sorption isotherms of all samples were also obtained. Initially amorphous THCl was produced in the presence of ≥40% w/w pectin, κ-carrageenan, gelatin, and guar gum or ≥60% w/w PVP. Trends in polymer THCl crystallization inhibition (pectin≥κ-carrageenan>gelatin>guar gum≫PVP) were primarily based on the ability of the polymer to interact with THCl via hydrogen bonding and/or ionic interactions. The onset of THCl crystallization from the amorphous dispersions was also related to storage conditions. THCl remained amorphous at low RH conditions (0 and 23% RH) in all 1:1 dispersions except THCl:PVP. THCl crystallized in some dispersions below the glass transition temperature (Tg) but remained amorphous in others at T~Tg. At high RHs (75 and 85% RH), THCl crystallized within one day in all samples. Given the ease of THCl amorphization in the presence of a variety of polymers, even at higher vitamin concentrations than would be found in foods, it is likely that THCl is amorphous in many low moisture foods.
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Affiliation(s)
- Seda Arioglu-Tuncil
- Purdue University, Department of Food Science, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA.
| | - Vivekanand Bhardwaj
- Purdue University, Department of Industrial and Physical Pharmacy, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
| | - Lynne S Taylor
- Purdue University, Department of Industrial and Physical Pharmacy, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
| | - Lisa J Mauer
- Purdue University, Department of Food Science, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA.
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25
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Simion EL, Stîngă G, Iovescu A, Băran A, Anghel DF. Ageing of fluorescent and smart naphthalene labeled poly(acrylic acid)/cationic surfactant complex. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Kalra A, Luner P, Taylor LS, Byrn SR, Li T. Gaining Thermodynamic Insight From Distinct Glass Formation Kinetics of Structurally Similar Organic Compounds. J Pharm Sci 2017. [PMID: 28648689 DOI: 10.1016/j.xphs.2017.06.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thermodynamic and kinetic aspects of crystallization of 12 structurally similar organic compounds were investigated from the supercooled liquid state by calorimetric and rheologic measurements. Based on their crystallization behaviors, these compounds were divided into 3 categories: stable glass formers, poor glass formers, and good glass formers with poor stability on reheating. Correlation was sought between thermodynamic quantities and glass formation based on nucleation and crystal growth theories. Larger values of enthalpy of fusion and melting point were found to correlate with poor glass-forming ability. Conversely, lower entropy of fusion was found to correlate with glass formation. Examination of kinetic aspects of glass formation revealed 2 important facets of good glass formers, that is, rapid increase in viscosity on supercooling and high melting point viscosity compared with non-glass formers. A broader relationship was sought between entropy of fusion and glass formation by including several glass formers from literature. Our analysis indicated that good glass formers tend to have an entropy of fusion closer to 0.3 J cm-3 K-1. The structural similarity of the compounds in this study provides insights regarding the nature of intermolecular interactions responsible for the observed effect on entropy of fusion, viscosity, and crystallization kinetics.
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Affiliation(s)
- Arjun Kalra
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Paul Luner
- Material and Analytical Sciences, Boehringer Ingelheim Pharmaceuticals, Ridgefield, Connecticut 06877
| | - Lynne S Taylor
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Stephen R Byrn
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Tonglei Li
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907.
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Insights into Nano- and Micron-Scale Phase Separation in Amorphous Solid Dispersions Using Fluorescence-Based Techniques in Combination with Solid State Nuclear Magnetic Resonance Spectroscopy. Pharm Res 2017; 34:1364-1377. [PMID: 28455777 DOI: 10.1007/s11095-017-2145-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 03/15/2017] [Indexed: 11/26/2022]
Abstract
PURPOSE Miscibility between the drug and the polymer in an amorphous solid dispersion (ASD) is considered to be one of the most important factors impacting the solid state stability and dissolution performance of the active pharmaceutical ingredient (API). The research described herein utilizes emerging fluorescence-based methodologies to probe (im)miscibility of itraconazole (ITZ)-hydroxypropyl methylcellulose (HPMC) ASDs. METHODS The ASDs were prepared by solvent evaporation with varying evaporation rates and were characterized by steady-state fluorescence spectroscopy, confocal imaging, differential scanning calorimetry (DSC), and solid state nuclear magnetic resonance (ssNMR) spectroscopy. RESULTS The size of the phase separated domains for the ITZ-HPMC ASDs was affected by the solvent evaporation rate. Smaller domains (<10 nm) were observed in spray-dried ASDs, whereas larger domains (>30 nm) were found in ASDs prepared using slower evaporation rates. Confocal imaging provided visual confirmation of phase separation along with chemical specificity, achieved by selectively staining drug-rich and polymer-rich phases. ssNMR confirmed the results of fluorescence-based techniques and provided information on the size of phase separated domains. CONCLUSIONS The fluorescence-based methodologies proved to be sensitive and rapid in detecting phase separation, even at the nanoscale, in the ITZ-HPMC ASDs. Fluorescence-based methods thus show promise for miscibility evaluation of spray-dried ASDs.
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28
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Li Z, Johnson LM, Ricarte RG, Yao LJ, Hillmyer MA, Bates FS, Lodge TP. Enhanced Performance of Blended Polymer Excipients in Delivering a Hydrophobic Drug through the Synergistic Action of Micelles and HPMCAS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2837-2848. [PMID: 28282137 DOI: 10.1021/acs.langmuir.7b00325] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Blends of hydroxypropyl methylcellulose acetate succinate (HPMCAS) and dodecyl (C12)-tailed poly(N-isopropylacrylamide) (PNIPAm) were systematically explored as a model system to dispense the active ingredient phenytoin by rapid dissolution, followed by the suppression of drug crystallization for an extended period. Dynamic and static light scattering revealed that C12-PNIPAm polymers, synthesized by reversible addition-fragmentation chain-transfer polymerization, self-assembled into micelles with dodecyl cores in phosphate-buffered saline (PBS, pH 6.5). A synergistic effect on drug supersaturation was documented during in vitro dissolution tests by varying the blending ratio, with HPMACS primarily aiding in rapid dissolution and PNIPAm maintaining supersaturation. Polarized light and cryogenic transmission electron microscopy experiments revealed that C12-PNIPAm micelles maintain drug supersaturation by inhibiting both crystal nucleation and growth. Cross-peaks between the phenyl group of phenytoin and the isopropyl group of C12-PNIPAm in 2D 1H nuclear Overhauser effect (NOESY) spectra confirmed the existence of drug-polymer intermolecular interactions in solution. Phenytoin and polymer diffusion coefficients, measured by diffusion-ordered NMR spectroscopy (DOSY), demonstrated that the drug-polymer association constant increased with increasing local density of the corona chains, coincident with a reduction in C12-PNIPAm molecular weight. These findings demonstrate a new strategy for exploiting the versatility of polymer blends through the use of self-assembled micelles in the design of advanced excipients.
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Affiliation(s)
- Ziang Li
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Lindsay M Johnson
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Ralm G Ricarte
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Letitia J Yao
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Marc A Hillmyer
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Frank S Bates
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Timothy P Lodge
- Department of Chemical Engineering and Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
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29
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Xie T, Taylor LS. Effect of Temperature and Moisture on the Physical Stability of Binary and Ternary Amorphous Solid Dispersions of Celecoxib. J Pharm Sci 2017; 106:100-110. [DOI: 10.1016/j.xphs.2016.06.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 05/26/2016] [Accepted: 06/09/2016] [Indexed: 11/25/2022]
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30
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Sato T, Taylor LS. Acceleration of the crystal growth rate of low molecular weight organic compounds in supercooled liquids in the presence of polyhydroxybutyrate. CrystEngComm 2017. [DOI: 10.1039/c6ce02177h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Jena S, Horn J, Suryanarayanan R, Friess W, Aksan A. Effects of Excipient Interactions on the State of the Freeze-Concentrate and Protein Stability. Pharm Res 2016; 34:462-478. [DOI: 10.1007/s11095-016-2078-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 12/02/2016] [Indexed: 11/30/2022]
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32
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Lehmkemper K, Kyeremateng SO, Heinzerling O, Degenhardt M, Sadowski G. Long-Term Physical Stability of PVP- and PVPVA-Amorphous Solid Dispersions. Mol Pharm 2016; 14:157-171. [DOI: 10.1021/acs.molpharmaceut.6b00763] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kristin Lehmkemper
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
- TU Dortmund, Department of Biochemical and
Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
| | - Samuel O. Kyeremateng
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Oliver Heinzerling
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Matthias Degenhardt
- AbbVie Deutschland GmbH & Co. KG, Global Pharmaceutical R&D, Knollstraße, D-67061 Ludwigshafen am Rhein, Germany
| | - Gabriele Sadowski
- TU Dortmund, Department of Biochemical and
Chemical Engineering, Laboratory of Thermodynamics, Emil-Figge-Str. 70, D-44227 Dortmund, Germany
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33
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Theil F, Anantharaman S, Kyeremateng SO, van Lishaut H, Dreis-Kühne SH, Rosenberg J, Mägerlein M, Woehrle GH. Frozen in Time: Kinetically Stabilized Amorphous Solid Dispersions of Nifedipine Stable after a Quarter Century of Storage. Mol Pharm 2016; 14:183-192. [DOI: 10.1021/acs.molpharmaceut.6b00783] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Frank Theil
- AbbVie Deutschland GmbH & Co. KG, 67061 Ludwigshafen, Germany
| | | | | | | | | | - Jörg Rosenberg
- AbbVie Deutschland GmbH & Co. KG, 67061 Ludwigshafen, Germany
| | | | - Gerd H. Woehrle
- AbbVie Deutschland GmbH & Co. KG, 67061 Ludwigshafen, Germany
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34
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Shi NQ, Lai HW, Zhang Y, Feng B, Xiao X, Zhang HM, Li ZQ, Qi XR. On the inherent properties of Soluplus and its application in ibuprofen solid dispersions generated by microwave-quench cooling technology. Pharm Dev Technol 2016; 23:573-586. [DOI: 10.1080/10837450.2016.1256409] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Nian-Qiu Shi
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University, Changchun, Jilin Province, China
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
- School of Pharmacy, Jilin Medical University, Jilin, China
| | - Hong-Wei Lai
- School of Pharmacy, Jilin Medical University, Jilin, China
| | - Yong Zhang
- College of Life Science, Jilin University, Changchun, Jilin Province, China
| | - Bo Feng
- School of Pharmacy, Jilin Medical University, Jilin, China
| | - Xiao Xiao
- School of Pharmacy, Jilin Medical University, Jilin, China
| | - Hong-Mei Zhang
- School of Pharmacy, Jilin Medical University, Jilin, China
| | - Zheng-Qiang Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, College of Life Science, Jilin University, Changchun, Jilin Province, China
| | - Xian-Rong Qi
- Department of Pharmaceutics, School of Pharmaceutical Science, Peking University, Beijing, China
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35
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Laser irradiation to produce amorphous pharmaceuticals. Int J Pharm 2016; 514:282-289. [DOI: 10.1016/j.ijpharm.2016.06.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/14/2016] [Accepted: 06/16/2016] [Indexed: 11/20/2022]
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36
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Nie H, Su Y, Zhang M, Song Y, Leone A, Taylor LS, Marsac PJ, Li T, Byrn SR. Solid-State Spectroscopic Investigation of Molecular Interactions between Clofazimine and Hypromellose Phthalate in Amorphous Solid Dispersions. Mol Pharm 2016; 13:3964-3975. [PMID: 27653759 DOI: 10.1021/acs.molpharmaceut.6b00740] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Haichen Nie
- Department
of Industrial and Physical Pharmacy, Purdue University, 575 Stadium
Mall Drive, West Lafayette, Indiana 47907, United States
- Formulation
Sciences, Teva Pharmaceuticals, 145 Brandywine Parkway, West Chester, Pennsylvania 19380, United States
| | - Yongchao Su
- Merck Research Laboratories, 770 Sumneytown Pike, West
Point, Pennsylvania 19486, United States
| | - Mingtao Zhang
- Department
of Industrial and Physical Pharmacy, Purdue University, 575 Stadium
Mall Drive, West Lafayette, Indiana 47907, United States
| | - Yang Song
- Department
of Industrial and Physical Pharmacy, Purdue University, 575 Stadium
Mall Drive, West Lafayette, Indiana 47907, United States
- Global
DMPK, Takeda Pharmaceutical Inc., 10410 Science Center Drive, San Diego, California 92121, United States
| | - Anthony Leone
- Merck Research Laboratories, 770 Sumneytown Pike, West
Point, Pennsylvania 19486, United States
| | - Lynne S. Taylor
- Department
of Industrial and Physical Pharmacy, Purdue University, 575 Stadium
Mall Drive, West Lafayette, Indiana 47907, United States
| | - Patrick J. Marsac
- Department
of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536, United States
| | - Tonglei Li
- Department
of Industrial and Physical Pharmacy, Purdue University, 575 Stadium
Mall Drive, West Lafayette, Indiana 47907, United States
| | - Stephen R. Byrn
- Department
of Industrial and Physical Pharmacy, Purdue University, 575 Stadium
Mall Drive, West Lafayette, Indiana 47907, United States
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37
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Al-Obaidi H, Lawrence MJ, Buckton G. Atypical effects of incorporated surfactants on stability and dissolution properties of amorphous polymeric dispersions. ACTA ACUST UNITED AC 2016; 68:1373-1383. [PMID: 27696396 DOI: 10.1111/jphp.12645] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 08/24/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To understand the impact of ionic and non-ionic surfactants on the dissolution and stability properties of amorphous polymeric dispersions using griseofulvin (GF) as a model for poorly soluble drugs. METHODS Solid dispersions of the poorly water-soluble drug, griseofulvin (GF) and the polymers, poly(vinylpyrrolidone) (PVP) and poly(2-hydroxypropyl methacrylate) (PHPMA), have been prepared by spray drying and bead milling and the effect of the ionic and non-ionic surfactants, namely sodium dodecyl sulphate (SDS) and Tween-80, on the physico-chemical properties of the solid dispersions studied. KEY FINDINGS The X-ray powder diffraction data and hot-stage microscopy showed a fast re-crystallisation of GF. While dynamic vapour sorption (DVS) measurements indicated an increased water uptake, slow dissolution rates were observed for the solid dispersions incorporating surfactants. The order by which surfactants free dispersions were prepared seemed critical as indicated by DVS and thermal analysis. Dispersions prepared by milling with SDS showed significantly better stability than spray-dried dispersions (drug remained amorphous for more than 6 months) as well as improved dissolution profile. CONCLUSIONS We suggest that surfactants can hinder the dissolution by promoting aggregation of polymeric chains, however that effect depends mainly on how the particles were prepared.
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Affiliation(s)
| | - M Jayne Lawrence
- Institute of Pharmaceutical Science, King's College London, London, UK
| | - Graham Buckton
- The School of Pharmacy, University College London, London, UK
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38
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Van Duong T, Van den Mooter G. The role of the carrier in the formulation of pharmaceutical solid dispersions. Part II: amorphous carriers. Expert Opin Drug Deliv 2016; 13:1681-1694. [DOI: 10.1080/17425247.2016.1198769] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Tu Van Duong
- Department of Pharmaceutical and Pharmacological Sciences, Drug Delivery and Disposition, KU Leuven – University of Leuven, Leuven, Belgium
- Department of Pharmaceutics, Hanoi University of Pharmacy, Ha Noi, Vietnam
| | - Guy Van den Mooter
- Department of Pharmaceutical and Pharmacological Sciences, Drug Delivery and Disposition, KU Leuven – University of Leuven, Leuven, Belgium
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39
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Modeling Physical Stability of Amorphous Solids Based on Temperature and Moisture Stresses. J Pharm Sci 2016; 105:2932-2939. [PMID: 27185539 DOI: 10.1016/j.xphs.2016.03.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 03/05/2016] [Accepted: 03/22/2016] [Indexed: 11/19/2022]
Abstract
Isothermal microcalorimetry was utilized to monitor the crystallization process of amorphous ritonavir (RTV) and its hydroxypropylmethylcellulose acetate succinate-based amorphous solid dispersion under various stressed conditions. An empirical model was developed: ln(τ)=ln(A)+EaRT-b⋅wc, where τ is the crystallization induction period, A is a pre-exponential factor, Ea is the apparent activation energy, b is the moisture sensitivity parameter, and wc is water content. To minimize the propagation of errors associated with the estimates, a nonlinear approach was used to calculate mean estimates and confidence intervals. The physical stability of neat amorphous RTV and RTV in hydroxypropylmethylcellulose acetate succinate solid dispersions was found to be mainly governed by the nucleation kinetic process. The impact of polymers and moisture on the crystallization process can be quantitatively described by Ea and b in this Arrhenius-type model. The good agreement between the measured values under some less stressful test conditions and those predicted, reflected by the slope and R(2) of the correlation plot of these 2 sets of data on a natural logarithm scale, indicates its predictability of long-term physical stability of amorphous RTV in solid dispersions. To further improve the model, more understanding of the impact of temperature and moisture on the amorphous physical stability and fundamentals regarding nucleation and crystallization is needed.
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Grzybowska K, Capaccioli S, Paluch M. Recent developments in the experimental investigations of relaxations in pharmaceuticals by dielectric techniques at ambient and elevated pressure. Adv Drug Deliv Rev 2016; 100:158-82. [PMID: 26705851 DOI: 10.1016/j.addr.2015.12.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 12/05/2015] [Accepted: 12/09/2015] [Indexed: 10/22/2022]
Abstract
In recent years, there is a growing interest in improving the physicochemical stability of amorphous pharmaceutical solids due to their very promising applications to manufacture medicines characterized by a better water solubility, and consequently by a higher dissolution rate than those of their crystalline counterparts. In this review article, we show that the molecular mobility investigated both in the supercooled liquid and glassy states is the crucial factor required to understand molecular mechanisms that govern the physical stability of amorphous drugs. We demonstrate that pharmaceuticals can be thoroughly examined by means of the broadband dielectric spectroscopy, which is a very useful experimental technique to explore different relaxation processes and crystallization kinetics as well. Such studies conducted in the wide temperature and pressure ranges provide data needed in searching correlations between properties of molecular dynamics and crystallization process, which are aimed at developing effective and efficient methods for stabilizing amorphous drugs.
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Smart borax complexes starting from anionic surfactant in association with unlabeled or fluorescently labeled poly(acrylic acid)s. Colloid Polym Sci 2016. [DOI: 10.1007/s00396-016-3848-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kini A, Patel SB. Phase behavior, intermolecular interaction, and solid state characterization of amorphous solid dispersion of Febuxostat. Pharm Dev Technol 2016; 22:45-57. [DOI: 10.3109/10837450.2016.1138130] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Ashwini Kini
- Department of Pharmaceutics, Long Island University, Brooklyn, NY, USA
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Knopp MM, Nguyen JH, Mu H, Langguth P, Rades T, Holm R. Influence of Copolymer Composition on In Vitro and In Vivo Performance of Celecoxib-PVP/VA Amorphous Solid Dispersions. AAPS JOURNAL 2016; 18:416-23. [PMID: 26769250 DOI: 10.1208/s12248-016-9865-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 12/31/2015] [Indexed: 11/30/2022]
Abstract
Previous studies suggested that an amorphous solid dispersion with a copolymer consisting of both hydrophobic and hydrophilic monomers could improve the dissolution profile of a poorly water-soluble drug compared to the crystalline form. Therefore, this study investigated the influence of the copolymer composition of polyvinylpyrrolidone/vinyl acetate (PVP/VA) on the non-sink in vitro dissolution behavior and in vivo performance of celecoxib (CCX) amorphous solid dispersions. The study showed that the hydrophilic monomer vinylpyrrolidone (VP) was responsible for the generation of CCX supersaturation whereas the hydrophobic monomer vinyl acetate (VA) was responsible for the stabilization of the supersaturated solution. For CCX, there was an optimal copolymer composition around 50-60% VP content where further replacement of VP monomers with VA monomers did not have any biopharmaceutical advantages. A linear relationship was found between the in vitro AUC(0-4h) and in vivo AUC(0-24h) for the CCX:PVP/VA systems, indicating that the non-sink in vitro dissolution method applied in this study was useful in predicting the in vivo performance. These results indicated that when formulating a poorly water-soluble drug as an amorphous solid dispersion using a copolymer, the copolymer composition has a significant influence on the dissolution profile and in vivo performance. Thus, the dissolution profile of a drug can theoretically be tailored by changing the monomer ratio of a copolymer with respect to the required in vivo plasma-concentration profile. As this ratio is likely to be drug dependent, determining the optimal ratio between the hydrophilic (dissolution enhancing) and hydrophobic (crystallization inhibiting) monomers for a given drug is imperative.
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Affiliation(s)
- Matthias Manne Knopp
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, 2500, Valby, Denmark.,Institute of Pharmacy and Biochemistry, Johannes Gutenberg University of Mainz, 55128, Mainz, Germany
| | - Julia Hoang Nguyen
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, 2500, Valby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Huiling Mu
- Department of Pharmacy, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Peter Langguth
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University of Mainz, 55128, Mainz, Germany
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, 2100, Copenhagen, Denmark
| | - René Holm
- Pharmaceutical Science and CMC Biologics, H. Lundbeck A/S, 2500, Valby, Denmark. .,Department of Pharmacy, University of Copenhagen, 2100, Copenhagen, Denmark.
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Page S, Maurer R, Wyttenbach N. Structured Development Approach for Amorphous Systems. FORMULATING POORLY WATER SOLUBLE DRUGS 2016. [DOI: 10.1007/978-3-319-42609-9_8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Ito I, Ito A, Unezaki S. Preparation of an oral acetaminophen film that is expected to improve medication administration: Effect of polyvinylpyrrolidone on physical properties of the film. Drug Discov Ther 2016; 10:156-62. [DOI: 10.5582/ddt.2016.01034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ikumi Ito
- Department of Practical Pharmacy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Akihiko Ito
- Department of Medicinal Therapy Research, Meiji Pharmaceutical University
| | - Sakae Unezaki
- Department of Practical Pharmacy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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Yuan X, Xiang TX, Anderson BD, Munson EJ. Hydrogen Bonding Interactions in Amorphous Indomethacin and Its Amorphous Solid Dispersions with Poly(vinylpyrrolidone) and Poly(vinylpyrrolidone-co-vinyl acetate) Studied Using 13C Solid-State NMR. Mol Pharm 2015; 12:4518-28. [DOI: 10.1021/acs.molpharmaceut.5b00705] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoda Yuan
- College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536, United States
| | - Tian-Xiang Xiang
- College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536, United States
| | - Bradley D. Anderson
- College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536, United States
| | - Eric J. Munson
- College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536, United States
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Chen X, Stoneburner K, Ladika M, Kuo TC, Kalantar TH. High-Throughput Raman Spectroscopy Screening of Excipients for the Stabilization of Amorphous Drugs. APPLIED SPECTROSCOPY 2015; 69:1271-1280. [PMID: 26647050 DOI: 10.1366/15-07914] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Low aqueous solubility of active pharmaceutical ingredients (APIs) is an enduring problem in pharmaceutical development, and it is becoming increasingly prevalent among new drug candidates. It is estimated that about 40% of drugs in the development pipeline and approximately 60% of the drugs coming directly from discovery suffer from poor aqueous solubility and slow dissolution, thereby reducing their bioavailability and efficacy and thus preventing their commercialization. It is well known that utilizing the amorphous form of a drug can be a useful approach to improve the dissolution rate and solubility of poorly water-soluble APIs. Amorphous compounds are thermodynamically unstable, but they can be stabilized by combining them with a carrier polymer (excipient) to form a solid dispersion. High-throughput Raman spectroscopy was used in this study to identify excipients that promote formation and stabilization of the amorphous drug form in solid dispersions. Four model APIs were used as poorly soluble drug candidates: ketoprofen, danazol, griseofulvin, and probucol. The Raman signals of excipients were generally negligible, and therefore Raman bands from the drugs were used with minimal spectral pre-processing. By comparing Raman spectra collected from the APIs in the crystalline and molten state, appropriate spectral features and regions were identified for the development of semi-quantitative methods to determine the amorphous content for each API. It is demonstrated that methods based on peak intensity ratio, peak width, peak distance, and classical least squares can all be effective methods for the screening of excipients. Interesting excipient-dependent phase transformation behavior was also observed for probucol.
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Affiliation(s)
- Xiaoyun Chen
- Analytical Sciences, Core R&D, Dow Chemical Company, Midland, MI 48667 USA
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Mistry P, Mohapatra S, Gopinath T, Vogt FG, Suryanarayanan R. Role of the Strength of Drug-Polymer Interactions on the Molecular Mobility and Crystallization Inhibition in Ketoconazole Solid Dispersions. Mol Pharm 2015; 12:3339-50. [PMID: 26070543 DOI: 10.1021/acs.molpharmaceut.5b00333] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The effects of specific drug-polymer interactions (ionic or hydrogen-bonding) on the molecular mobility of model amorphous solid dispersions (ASDs) were investigated. ASDs of ketoconazole (KTZ), a weakly basic drug, with each of poly(acrylic acid) (PAA), poly(2-hydroxyethyl methacrylate) (PHEMA), and polyvinylpyrrolidone (PVP) were prepared. Drug-polymer interactions in the ASDs were evaluated by infrared and solid-state NMR, the molecular mobility quantified by dielectric spectroscopy, and crystallization onset monitored by differential scanning calorimetry (DSC) and variable temperature X-ray diffractometry (VTXRD). KTZ likely exhibited ionic interactions with PAA, hydrogen-bonding with PHEMA, and weaker dipole-dipole interactions with PVP. On the basis of dielectric spectroscopy, the α-relaxation times of the ASDs followed the order: PAA > PHEMA > PVP. In addition, the presence of ionic interactions also translated to a dramatic and disproportionate decrease in mobility as a function of polymer concentration. On the basis of both DSC and VTXRD, an increase in strength of interaction translated to higher crystallization onset temperature and a decrease in extent of crystallization. Stronger drug-polymer interactions, by reducing the molecular mobility, can potentially delay the crystallization onset temperature as well as crystallization extent.
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Affiliation(s)
| | | | | | - Frederick G Vogt
- Morgan, Lewis, and Bockius LLP, Philadelphia, Pennsylvania 19103, United States
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Sharma M, Trout BL. Effect of Pore Size and Interactions on Paracetamol Aggregation in Porous Polyethylene Glycol Diacrylate Polymers. J Phys Chem B 2015; 119:8135-45. [DOI: 10.1021/jp512788a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manju Sharma
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Bernhardt L. Trout
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Capece M, Davé R. Enhanced Physical Stability of Amorphous Drug Formulations via Dry Polymer Coating. J Pharm Sci 2015; 104:2076-2084. [DOI: 10.1002/jps.24451] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 03/17/2015] [Accepted: 03/24/2015] [Indexed: 11/07/2022]
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