1
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Luo M, Chen A, Huang C, Guo M, Cai T. Effects of Polymers on Cocrystal Growth in a Drug-Drug Coamorphous System: Relations between Glass-to-Crystal Growth and Surface-Enhanced Crystal Growth. Mol Pharm 2024. [PMID: 38818946 DOI: 10.1021/acs.molpharmaceut.4c00315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Coamorphous and cocrystal drug delivery systems provide attractive crystal engineering strategies for improving the solubilities, dissolution rates, and oral bioavailabilities of poorly water-soluble drugs. Polymeric additives have often been used to inhibit the unwanted crystallization of amorphous drugs. However, the transformation of a coamorphous phase to a cocrystal phase in the presence of polymers has not been fully elucidated. Herein, we investigated the effects of low concentrations of the polymeric excipients poly(ethylene oxide) (PEO) and poly(vinylpyrrolidone) (PVP) on the growth of carbamazepine-celecoxib (CBZ-CEL) cocrystals from the corresponding coamorphous phase. PEO accelerated the growth rate of the cocrystals by increasing the molecular mobility of the coamorphous system, while PVP had the opposite effect. The coamorphous CBZ-CEL system exhibited two anomalously fast crystal growth modes: glass-to-crystal (GC) growth in the bulk and accelerated crystal growth at the free surface. These two fast growth modes both disappeared after doping with PEO (1-3% w/w) but were retained in the presence of PVP, indicating a potential correlation between the two fast crystal growth modes. We propose that the different effects of PEO and PVP on the crystal growth modes arose from weaker effects of the polymers on cocrystallization at the surface than in the bulk. This work provides a deep understanding of the mechanisms by which polymers influence the cocrystallization kinetics of a multicomponent amorphous phase and highlights the importance of polymer selection in stabilizing coamorphous systems or preparing cocrystals via solid-based methods.
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Affiliation(s)
- Minqian Luo
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - An Chen
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Chengbin Huang
- CMC Drug Product, Research and Development, BeiGene Co., Inc., Beijing 102206, China
| | - Minshan Guo
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Ting Cai
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
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2
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Wang Y, Chin CY, Shivashekaregowda NKH, Shi Q. Implications of Low-concentration Polymer on the Physical Stability of Glassy Griseofulvin: Role of the Segmental Mobility. AAPS PharmSciTech 2024; 25:103. [PMID: 38714634 DOI: 10.1208/s12249-024-02809-7] [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: 01/30/2024] [Accepted: 04/17/2024] [Indexed: 05/10/2024] Open
Abstract
Crystallization of amorphous pharmaceutical solids are widely reported to be affected by the addition of polymer, while the underlying mechanism require deep study. Herein, crystal growth behaviors of glassy griseofulvin (GSF) doped with various 1% w/w polymer were systematically studied. From the molecular structure, GSF cannot form the hydrogen bonding interactions with the selected polymer poly(vinyl acetate), polyvinyl pyrrolidone (PVP), 60:40 vinyl pyrrolidone-vinyl acetate copolymer (PVP/VA 64), and poly(ethylene oxide) (PEO). 1% w/w polymer exhibited weak or no detectable effects on the glass transition temperature (Tg) of GSF. However, crystal growth rates of GSF was altered from 4.27-fold increase to 2.57-fold decrease at 8 ℃ below Tg of GSF. Interestingly, the ability to accelerate and inhibit the growth rates of GSF crystals correlated well with Tg of polymer, indicating the controlling role of segmental mobility of polymer. Moreover, ring-banded growth of GSF was observed in the polymer-doped systems. Normal compact bulk and ring-banded crystals of GSF were both characterized as the thermodynamically stable form I. More importantly, formation of ring-banded crystals of GSF can significantly weaken the inhibitory effects of polymer on the crystallization of glassy GSF.
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Affiliation(s)
- Yanan Wang
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, China
- Digital Health and Medical Advancement Impact Lab, Taylor's University, Subang Jaya, Selangor, 47500, Malaysia
| | - Chai-Yee Chin
- School of Pharmacy, Faculty of Health and Medical Science, Taylor's University, Subang Jaya, 47500, Malaysia
| | - Naveen Kumar Hawala Shivashekaregowda
- School of Pharmacy, Faculty of Health and Medical Science, Taylor's University, Subang Jaya, 47500, Malaysia.
- Digital Health and Medical Advancement Impact Lab, Taylor's University, Subang Jaya, Selangor, 47500, Malaysia.
| | - Qin Shi
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng, 224005, China.
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3
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Song S, Yao X, Wang C, Sun CC, Siegel RA. Delaying the First Nucleation Event of Amorphous Solid Dispersions Above the Polymer Overlap Concentration (c*): PVP and PVPVA in Posaconazole. J Pharm Sci 2024:S0022-3549(24)00154-0. [PMID: 38685452 DOI: 10.1016/j.xphs.2024.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/23/2024] [Accepted: 04/23/2024] [Indexed: 05/02/2024]
Abstract
A thorough understanding of effects of polymers on crystallization of amorphous drugs is essential for rational design of robust amorphous solid dispersion (ASD), since crystallization of the amorphous drug negates their solubility advantage. In this work, we measured the first nucleation time (t0, time to form the first critical nucleus in fresh liquid/glass) in posaconazole (POS)/polyvinylpyrrolidone vinyl acetate (PVPVA) and POS/polyvinylpyrrolidone (PVP K25) ASDs and showed that the polymer overlap concentration (c*, concentration above which adjacent polymer chains begin to contact) is critical in controlling crystallization of ASDs. When polymer concentration c < c*, t0 of POS ASDs is approximately equal to that of the neat amorphous POS, but it increases significantly when c > c*. This observation supports the view that the effective inhibitory effect of crystallization in ASDs above c* is primarily correlated with delay in the first nucleation event. Our finding is useful in efficient polymer selection and performance prediction of high drug loaded ASD formulations.
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Affiliation(s)
- Sichen Song
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, 55455, United States; School of Mathematics, University of Minnesota, Minneapolis, MN, 55455, United States
| | - Xin Yao
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI, 53705, United States; Research and Development, AbbVie Inc., North Chicago, IL, 60064, United States
| | - Chenguang Wang
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, 55455, United States
| | - Changquan Calvin Sun
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, 55455, United States
| | - Ronald A Siegel
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN, 55455, United States; Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, 55455, United States.
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4
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Zhang J, Guo M, Luo M, Cai T. Advances in the development of amorphous solid dispersions: The role of polymeric carriers. Asian J Pharm Sci 2023; 18:100834. [PMID: 37635801 PMCID: PMC10450425 DOI: 10.1016/j.ajps.2023.100834] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/26/2023] [Accepted: 07/23/2023] [Indexed: 08/27/2023] Open
Abstract
Amorphous solid dispersion (ASD) is one of the most effective approaches for delivering poorly soluble drugs. In ASDs, polymeric materials serve as the carriers in which the drugs are dispersed at the molecular level. To prepare the solid dispersions, there are many polymers with various physicochemical and thermochemical characteristics available for use in ASD formulations. Polymer selection is of great importance because it influences the stability, solubility and dissolution rates, manufacturing process, and bioavailability of the ASD. This review article provides a comprehensive overview of ASDs from the perspectives of physicochemical characteristics of polymers, formulation designs and preparation methods. Furthermore, considerations of safety and regulatory requirements along with the studies recommended for characterizing and evaluating polymeric carriers are briefly discussed.
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Affiliation(s)
- Jie Zhang
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Minshan Guo
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Minqian Luo
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Ting Cai
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
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5
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Zhang J, Liu M, Xu M, Chen Z, Peng X, Yang Q, Cai T, Zeng Z. Discovery of a new polymorph of clotrimazole through melt crystallization: Understanding nucleation and growth kinetics. J Chem Phys 2023; 158:034503. [PMID: 36681648 DOI: 10.1063/5.0130600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Clotrimazole (CMZ) is a classical antifungal drug for studying crystallization. In this study, a new CMZ polymorph (Form 2) was discovered during the process of nucleation and growth rate determination in the melt. High-quality single crystals were grown from melt microdroplets to determine the crystal structure by x-ray diffraction. Form 2 is metastable and exhibits a disordered structure. The crystal nucleation and growth kinetics of the two CMZ polymorphs were systematically measured. Form 2 nucleates and grows faster than the existing form (Form 1). The maximum nucleation rate of Forms 1 and 2 was observed at 50 °C (1.07 Tg). The summary of the maximum nucleation rate temperature of CMZ and the other six organic compounds indicates that nucleation near Tg in the supercooled liquid is a useful approach to discovering new polymorphs. This study is relevant for the discovering new drug polymorphs through an understanding of nucleation and growth kinetics during melt crystallization.
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Affiliation(s)
- Jie Zhang
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Minzhuo Liu
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Meixia Xu
- Yantai Key Laboratory of Nanomedicine and Advanced Preparations, Yantai Institute of Materia Medica, Shandong 264000, China
| | - Zhiguo Chen
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Xucong Peng
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Qiusheng Yang
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
| | - Ting Cai
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Zhihong Zeng
- College of Biological and Chemical Engineering, Changsha University, Changsha 410022, China
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6
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Shi Q, Chen H, Wang Y, Wang R, Xu J, Zhang C. Amorphous Solid Dispersions: Role of the Polymer and Its Importance in Physical Stability and In Vitro Performance. Pharmaceutics 2022; 14:pharmaceutics14081747. [PMID: 36015373 PMCID: PMC9413000 DOI: 10.3390/pharmaceutics14081747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/15/2022] [Accepted: 08/18/2022] [Indexed: 01/25/2023] Open
Abstract
Amorphous solid dispersions stabilized by one or more polymer(s) have been widely used for delivering amorphous drugs with poor water solubilities, and they have gained great market success. Polymer selection is important for preparing robust amorphous solid dispersions, and considerations should be given as to how the critical attributes of a polymer can enhance the physical stability, and the in vitro and in vivo performances of a drug. This article provides a comprehensive overview for recent developments in the understanding the role of polymers in amorphous solid dispersions from the aspects of nucleation, crystal growth, overall crystallization, miscibility, phase separation, dissolution, and supersaturation. The critical properties of polymers affecting the physical stability and the in vitro performance of amorphous solid dispersions are also highlighted. Moreover, a perspective regarding the current research gaps and novel research directions for better understanding the role of the polymer is provided. This review will provide guidance for the rational design of polymer-based amorphous pharmaceutical solids with desired physicochemical properties from the perspective of physical stability and in vitro performance.
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Affiliation(s)
- Qin Shi
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
- Correspondence: (Q.S.); (C.Z.)
| | - Haibiao Chen
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Yanan Wang
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Ruoxun Wang
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Jia Xu
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Chen Zhang
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
- Correspondence: (Q.S.); (C.Z.)
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7
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Yao X, Benson EG, Gui Y, Stelzer T, Zhang GGZ, Yu L. Surfactants Accelerate Crystallization of Amorphous Nifedipine by Similar Enhancement of Nucleation and Growth Independent of Hydrophilic-Lipophilic Balance. Mol Pharm 2022; 19:2343-2350. [PMID: 35477294 DOI: 10.1021/acs.molpharmaceut.2c00156] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Amorphous formulations, increasingly employed to deliver poorly soluble drugs, generally contain surfactants to improve wetting and dissolution. These surfactants are often liquids and can potentially increase the mobility of the drug and reduce its stability, but little is known about this effect. Here we investigate the effect of four common nonionic surfactants (Tween 80, Span 80, Triton X-100, and Poloxamer 407) on the crystallization of amorphous nifedipine (NIF). We find that the surfactants significantly enhance the rates of crystal nucleation and growth even at low concentrations, by up to 2 orders of magnitude at 10 wt %. The surfactants tested show similar enhancement effects independent of their structural details and hydrophilic-lipophilic balance (HLB), suggesting that surfactant adsorption at solid/liquid interfaces does not play a major role in crystal nucleation and growth. Importantly, the surfactants accelerate crystal nucleation and growth by a similar factor. This result mirrors the previous finding that a polymer dopant in a molecular glass-former causes similar slowdown of nucleation and growth. These results indicate that nucleation and growth in a deeply supercooled liquid are both mobility-limited, and a dopant mainly functions as a mobility modifier (enhancer or suppressor depending on the dopant). The common surfactants tested are all mobility enhancers and destabilize the amorphous drug, and this negative effect must be managed using stabilizers such as polymers. The effect of surfactants on nucleation can be predicted from the effect on crystal growth and the crystallization kinetics of the pure system, using the same principle previously established for drug-polymer systems. We show how the independently measured nucleation and growth rates enable predictions of the overall crystallization rates.
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Affiliation(s)
| | | | | | - Torsten Stelzer
- Department of Pharmaceutical Sciences, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico 00936, United States.,Crystallization Design Institute, Molecular Sciences Research Center, University of Puerto Rico, San Juan, Puerto Rico 00926, United States
| | - Geoff G Z Zhang
- Drug Product Development, Research and Development, AbbVie Inc., North Chicago, Illinois 60064, United States
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8
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Recent advances in drug polymorphs: Aspects of pharmaceutical properties and selective crystallization. Int J Pharm 2022; 611:121320. [PMID: 34843866 DOI: 10.1016/j.ijpharm.2021.121320] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 11/02/2021] [Accepted: 11/23/2021] [Indexed: 12/27/2022]
Abstract
Drug polymorphism, an established term used to describe the phenomenon that a drug can exist in different crystalline phases, has attracted great interests in pharmaceutical field in consideration of its important role in affecting the pharmaceutical performance of oral formulations. This paper presents an overview of recent advances in the research on polymorphic drug systems including understandings on nucleation, crystal growth, dissolution, mechanical properties, polymorphic transformation, etc. Moreover, new strategies and mechanisms in the control of polymorphic forms are also highlighted in this review. Furthermore, challenges and trends in the development of polymorphic drugs are briefly discussed, aiming at developing effective and efficient pharmaceutical formulations containing the polymorphic drugs.
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9
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Shi Q, Li F, Yeh S, Moinuddin SM, Xin J, Xu J, Chen H, Ling B. Recent Advances in Enhancement of Dissolution and Supersaturation of Poorly Water-Soluble Drug in Amorphous Pharmaceutical Solids: A Review. AAPS PharmSciTech 2021; 23:16. [PMID: 34893936 DOI: 10.1208/s12249-021-02137-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/07/2021] [Indexed: 12/19/2022] Open
Abstract
Amorphization is one of the most effective pharmaceutical approaches to enhance the dissolution and oral bioavailability of poorly water-soluble drugs. In recent years, amorphous formulations have been experiencing rapid development both in theoretical and practical application. Based on using different types of stabilizing agents, amorphous formulations can be mainly classified as polymer-based amorphous solid dispersion, coamorphous formulation, mesoporous silica-based amorphous formulation, etc. This paper summarizes recent advances in the dissolution and supersaturation of these amorphous formulations. Moreover, we also highlight the roles of stabilizing agents such as polymers, low molecular weight co-formers, and mesoporous silica. Maintaining supersaturation in solution is a key factor for the enhancement of dissolution profile and oral bioavailability, and thus, the strategies and challenges for maintaining supersaturation are also discussed. With an in-depth understanding of the inherent mechanisms of dissolution behaviors, the design of amorphous pharmaceutical formulations will become more scientific and reasonable, leading to vigorous development of commercial amorphous drug products.
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10
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Zhang J, Shi Q, Qu T, Zhou D, Cai T. Crystallization kinetics and molecular dynamics of binary coamorphous systems of nimesulide and profen analogs. Int J Pharm 2021; 610:121235. [PMID: 34743960 DOI: 10.1016/j.ijpharm.2021.121235] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/07/2021] [Accepted: 10/23/2021] [Indexed: 12/31/2022]
Abstract
Coamorphous drug delivery systems have emerged as a promising formulation technique for improving the solubility and oral bioavailability of poorly soluble drugs. The selection of a suitable coformer is the key to obtaining a successful coamorphous formulation. This study aims to investigate the impacts of coformers with similar chemical structures but different physical properties on the crystallization behavior and molecular dynamics of binary amorphous systems. The addition of three profen analogs, ibuprofen (IBU), ketoprofen (KETO) and indoprofen (INDO) leads to significantly different effects on the crystallization kinetics of amorphous nimesulide (NIME). The crystal growth rates for amorphous NIME are substantially accelerated in the presence of IBU, but drastically reduced in the presence of INDO, while the incorporation of KETO results in a negligible effect. Broadband dielectric spectroscopy is employed to characterize the molecular dynamics of neat amorphous NIME and coamorphous systems. The addition of three structural analogs alters the molecular mobility of amorphous NIME in different ways, which is consistent with the trend observed for their impacts on the crystallization kinetics, suggesting that the relative mobility between the components of coamorphous mixtures governs the physical stability. In addition, it is found that the temperature dependence of the α-relaxation times for NIME with and without coformers is superimposed once the temperature is scaled by Tg/T, whereas the crystallization kinetics do not overlap on a Tg/T scale. This deviation can result from a complex interplay of thermodynamic and kinetic factors involved in multicomponent amorphous systems. This study provides insights into the crystallization kinetics and molecular dynamics of coamorphous systems containing drug analogs, which can potentially offer more flexibility for the control of physical stability without sacrificing therapeutic efficacy.
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Affiliation(s)
- Jie Zhang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Qin Shi
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Tengfei Qu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Dongshan Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Ting Cai
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
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11
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Jia S, Gao Z, Tian N, Li Z, Gong J, Wang J, Rohani S. Review of melt crystallization in the pharmaceutical field, towards crystal engineering and continuous process development. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2020.12.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Zhang J, Liu Z, Wu H, Cai T. Effect of polymeric excipients on nucleation and crystal growth kinetics of amorphous fluconazole. Biomater Sci 2021; 9:4308-4316. [DOI: 10.1039/d1bm00104c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Three chemically distinct polymeric excipients show significantly different effects on the nucleation and crystal growth kinetics of amorphous fluconazole, a classical antifungal drug.
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Affiliation(s)
- Jie Zhang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Zhengyu Liu
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Haomin Wu
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
| | - Ting Cai
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
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13
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Shi Q, Cheng J, Li F, Xu J, Zhang C. Molecular Mobility and Crystal Growth in Amorphous Binary Drug Delivery Systems: Effects of Low-Concentration Poly(Ethylene Oxide). AAPS PharmSciTech 2020; 21:317. [PMID: 33175339 DOI: 10.1208/s12249-020-01869-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/28/2020] [Indexed: 12/31/2022] Open
Abstract
Polymer additives have been widely reported to affect the crystallization of amorphous drugs, while the underlying mechanism is poorly understood. The present study aims to investigate the relationship between the crystal growth and the molecular mobility of amorphous nifedipine (NIF) in the presence and absence of low-concentration poly(ethylene oxide) (PEO). The addition of 3% w/w PEO yields approximately a 5-fold increase in the crystal growth rate of NIF in the glassy matrix and a 10-fold increase in the supercooled liquid. Broadband dielectric spectroscopy is performed to investigate the molecular mobility of amorphous pure NIF system and NIF doped with low-concentration PEO. With 3% w/w PEO, the structural relaxation time τα of amorphous NIF significantly decreases, indicating an increase in the global molecular mobility. However, the increase of the molecular mobility is insufficient to explain the 5- to 10-fold increase of the crystal growth rate at the same τα scale. Moreover, we compare the accelerating effect of PEO in NIF-PEO systems to other PEO-doped systems. The accelerating effect of low-concentration PEO on the crystal growth of amorphous drugs is found to be independent of the Flory-Huggins interaction, Tg of the drug, or the increase of the global molecular mobility. These findings suggest that an in-depth understanding regarding the effects of polymer additives on the crystallization of drugs should consider the localized mobility of the host molecules near the crystal-liquid interface.
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14
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Shi Q, Li F, Yeh S, Wang Y, Xin J. Physical stability of amorphous pharmaceutical solids: Nucleation, crystal growth, phase separation and effects of the polymers. Int J Pharm 2020; 590:119925. [PMID: 33011255 DOI: 10.1016/j.ijpharm.2020.119925] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/22/2020] [Accepted: 09/25/2020] [Indexed: 01/03/2023]
Abstract
Compared to their crystalline forms, amorphous pharmaceutical solids present marvelous potential and advantages for effectively improving the oral bioavailability of poorly water-soluble drugs. A central issue in developing amorphous pharmaceutical solids is the stability against crystallization, which is particularly important for maintaining their advantages in solubility and dissolution rate. This review provides a comprehensive overview of recent studies focusing on the physical stability of amorphous pharmaceutical solids affected by nucleation, crystal growth, phase separation and the addition of polymers. Moreover, we highlight the novel technologies and theories in the field of amorphous pharmaceutical solids. Meanwhile, the challenges and strategies in maintaining the physical stability of amorphous pharmaceutical solids are also discussed. With a better understanding of physical stability, the more robust amorphous pharmaceutical formulations with desired pharmaceutical performance would be easier to achieve.
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Affiliation(s)
- Qin Shi
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China; Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
| | - Fang Li
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Stacy Yeh
- Department of Cancer Biology, School of Medicine, Wake Forest University, Winston Salem 27103, USA
| | - Yanan Wang
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
| | - Junbo Xin
- School of Pharmacy, Jiangsu Vocational College of Medicine, Yancheng 224005, China
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15
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Zhang J, Shi Q, Guo M, Liu Z, Cai T. Melt Crystallization of Indomethacin Polymorphs in the Presence of Poly(ethylene oxide): Selective Enrichment of the Polymer at the Crystal–Liquid Interface. Mol Pharm 2020; 17:2064-2071. [DOI: 10.1021/acs.molpharmaceut.0c00220] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie Zhang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Qin Shi
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Minshan Guo
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Zhengyu Liu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Ting Cai
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
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16
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Minecka A, Kamińska E, Tarnacka M, Jurkiewicz K, Talik A, Wolnica K, Dulski M, Kasprzycka A, Spychalska P, Garbacz G, Kamiński K, Paluch M. Does the molecular mobility and flexibility of the saccharide ring affect the glass-forming ability of naproxen in binary mixtures? Eur J Pharm Sci 2020; 141:105091. [PMID: 31655208 DOI: 10.1016/j.ejps.2019.105091] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/23/2019] [Accepted: 09/25/2019] [Indexed: 12/15/2022]
Abstract
In this paper, we studied the impact of saccharides having a similar backbone but differing in the degree of freedom, local molecular mobility, flexibility of the ring and intermolecular interactions on the glass-forming ability (GFA) of naproxen (NAP) in binary mixtures. For this purpose, a series of methyl and acetyl derivatives of glucose (GLS) and anhydroglucose (anhGLS), as well as neat anhGLS have been used to produce homogeneous solid dispersions (SDs) of varying molar concentration of examined active pharmaceutical ingredient (API). Systematic measurements with the use of Differential Scanning Calorimetry (DSC) and Broadband Dielectric Spectroscopy (BDS) enabled us to determine the phase transitions, homogeneity and molecular mobility of the investigated binary mixtures as well as the impact of excipient on the crystallization tendency of NAP. It turned out that acetylated glucose (acGLS), one of the most mobile and flexible saccharides of all examined herein materials, is the best excipient enhancing the GFA of studied API. Although, it should be noted that upon storage at room temperature, we observed the recrystallization of NAP from binary mixtures. Interestingly, API always crystallized to the initial polymorphic form, as shown by X-ray diffraction (XRD) investigations. Finally, since additional measurements with the use of Fourier Transform Infrared (FTIR) Spectroscopy clearly indicated that there are no significant differences in the intermolecular interactions in the systems composed of NAP and all examined saccharides, one can postulate that the mobility and ring flexibility of the matrix have, , the most important impact on the crystallization tendency of NAP upon cooling. Consequently, it seems that in some cases, more mobile/flexible matrices can be a much better choice to enhance the glass-forming ability of studied pharmaceutical.
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Affiliation(s)
- A Minecka
- Department of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland.
| | - E Kamińska
- Department of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland.
| | - M Tarnacka
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - K Jurkiewicz
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - A Talik
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - K Wolnica
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - M Dulski
- Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Institute of Material Sciences, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - A Kasprzycka
- Department of Chemistry, Silesian Technical University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland; Biotechnology Centre, Silesian Technical University of Technology, Krzywoustego 8, 44-100 Gliwice, Poland
| | - P Spychalska
- Biotechnology Centre, Silesian Technical University of Technology, Krzywoustego 8, 44-100 Gliwice, Poland
| | - G Garbacz
- Physiolution GmbH, Walther-Rathenau-Str. 49a, 17489 Greifswald, Germany
| | - K Kamiński
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - M Paluch
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland; Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
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17
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Lu X, Huang C, Lowinger MB, Yang F, Xu W, Brown CD, Hesk D, Koynov A, Schenck L, Su Y. Molecular Interactions in Posaconazole Amorphous Solid Dispersions from Two-Dimensional Solid-State NMR Spectroscopy. Mol Pharm 2019; 16:2579-2589. [DOI: 10.1021/acs.molpharmaceut.9b00174] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xingyu Lu
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Chengbin Huang
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
- School of Pharmacy, University of Wisconsin−Madison, Madison, Wisconsin 53705, United States
| | - Michael B. Lowinger
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Fengyuan Yang
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
- Ashland Inc., Wilmington, Delaware 19808, United States
| | - Wei Xu
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Chad D. Brown
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - David Hesk
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Athanas Koynov
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Luke Schenck
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Yongchao Su
- Merck Research Laboratories (MRLs), Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
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18
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Improving Stability and Dissolution of Amorphous Clofazimine by Polymer Nano-Coating. Pharm Res 2019; 36:67. [DOI: 10.1007/s11095-019-2584-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 02/03/2019] [Indexed: 10/27/2022]
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19
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Zhang J, Shi Q, Tao J, Peng Y, Cai T. Impact of Polymer Enrichment at the Crystal–Liquid Interface on Crystallization Kinetics of Amorphous Solid Dispersions. Mol Pharm 2019; 16:1385-1396. [DOI: 10.1021/acs.molpharmaceut.8b01331] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jie Zhang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Qin Shi
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Jun Tao
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Yayun Peng
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Ting Cai
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
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20
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Luebbert C, Sadowski G. In-situ determination of crystallization kinetics in ASDs via water sorption experiments. Eur J Pharm Biopharm 2018; 127:183-193. [DOI: 10.1016/j.ejpb.2018.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/19/2018] [Accepted: 02/20/2018] [Indexed: 11/28/2022]
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21
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Shi Q, Zhang J, Zhang C, Jiang J, Tao J, Zhou D, Cai T. Selective Acceleration of Crystal Growth of Indomethacin Polymorphs by Low-Concentration Poly(ethylene oxide). Mol Pharm 2017; 14:4694-4704. [DOI: 10.1021/acs.molpharmaceut.7b00854] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Qin Shi
- State Key Laboratory
of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Jie Zhang
- State Key Laboratory
of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Chen Zhang
- Department of Polymer Science and Engineering,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Jing Jiang
- Department of Polymer Science and Engineering,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Jun Tao
- State Key Laboratory
of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
| | - Dongshan Zhou
- Department of Polymer Science and Engineering,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Ting Cai
- State Key Laboratory
of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of Drug Discovery for Metabolic
Diseases, China Pharmaceutical University, Nanjing 210009, China
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22
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Shi Q, Zhang C, Su Y, Zhang J, Zhou D, Cai T. Acceleration of Crystal Growth of Amorphous Griseofulvin by Low-Concentration Poly(ethylene oxide): Aspects of Crystallization Kinetics and Molecular Mobility. Mol Pharm 2017; 14:2262-2272. [DOI: 10.1021/acs.molpharmaceut.7b00097] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Chen Zhang
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | | | | | - Dongshan Zhou
- Department
of Polymer Science and Engineering, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
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23
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Madejczyk O, Kaminska E, Tarnacka M, Dulski M, Jurkiewicz K, Kaminski K, Paluch M. Studying the Crystallization of Various Polymorphic Forms of Nifedipine from Binary Mixtures with the Use of Different Experimental Techniques. Mol Pharm 2017; 14:2116-2125. [DOI: 10.1021/acs.molpharmaceut.7b00228] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- O. Madejczyk
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - E. Kaminska
- Department
of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - M. Tarnacka
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M. Dulski
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
- Institute
of Material Science, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - K. Jurkiewicz
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - K. Kaminski
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M. Paluch
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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24
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Huang C, Powell CT, Sun Y, Cai T, Yu L. Effect of Low-Concentration Polymers on Crystal Growth in Molecular Glasses: A Controlling Role for Polymer Segmental Mobility Relative to Host Dynamics. J Phys Chem B 2017; 121:1963-1971. [PMID: 28140590 DOI: 10.1021/acs.jpcb.6b11816] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Low-concentration polymers can strongly influence crystal growth in small-molecule glasses, a phenomenon important for improving physical stability against crystallization. We measured the velocity of crystal growth in two molecular glasses, nifedipine (NIF) and o-terphenyl (OTP), each doped with four or five different polymers. For each polymer, the concentration was fixed at 1 wt % and a wide range of molecular weights was tested. We find that a polymer additive can strongly alter the rate of crystal growth, from a 10-fold reduction to a 10-fold increase. For a given polymer, increasing molecular weight slows down crystal growth and the effect saturates around DP = 100, where DP is the degree of polymerization. For all the systems studied, the polymer effect on crystal growth rate forms a master curve in the variable (Tg,polymer - Tg,host)/Tcryst, where Tg is the glass transition temperature and Tcryst is the crystallization temperature. These results support the view that a polymer's effect on crystal growth is controlled by its segmental mobility relative to the host-molecule dynamics. In the proposed model, crystal growth rejects impurities and creates local polymer-rich regions, which must be traversed by host molecules to sustain crystal growth at rates determined by polymer segmental mobility. Our results do not support the view that host-polymer hydrogen bonding plays a controlling role in crystal growth inhibition.
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Affiliation(s)
| | | | | | - Ting Cai
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Department of Pharmaceutics, College of Pharmacy, China Pharmaceutical University , Nanjing 210009, China
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25
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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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26
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Zografi G, Newman A. Interrelationships Between Structure and the Properties of Amorphous Solids of Pharmaceutical Interest. J Pharm Sci 2017; 106:5-27. [DOI: 10.1016/j.xphs.2016.05.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/27/2016] [Accepted: 05/03/2016] [Indexed: 10/21/2022]
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27
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Zhang W, Teerakapibal R, Yu L. Surface Mobility of Amorphous o-Terphenyl: A Strong Inhibitory Effect of Low-Concentration Polystyrene. J Phys Chem B 2016; 120:6842-7. [DOI: 10.1021/acs.jpcb.6b04606] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei Zhang
- School of Pharmacy and ‡Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Rattavut Teerakapibal
- School of Pharmacy and ‡Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Lian Yu
- School of Pharmacy and ‡Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
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28
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Yu L. Surface mobility of molecular glasses and its importance in physical stability. Adv Drug Deliv Rev 2016; 100:3-9. [PMID: 26774328 DOI: 10.1016/j.addr.2016.01.005] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 01/04/2016] [Accepted: 01/05/2016] [Indexed: 11/26/2022]
Abstract
Amorphous molecular materials (molecular glasses) are useful for drug delivery, bio-preservation and organic electronics. A central issue in developing amorphous materials is the stability against crystallization and other transformations that can compromise material performance. We review recent progress in understanding the stability of molecular glasses, particularly the role for surface mobility. Surface diffusion in molecular glasses can be vastly faster than bulk diffusion. This high surface mobility enables fast crystal growth on the free surface. In this process, surface crystals grow upward and laterally, with the lateral growth rate being roughly proportional to surface diffusivity. Surface mobility also influences bulk crystal growth as the process can create fracture and free surfaces. During vapor deposition, surface mobility allows efficient equilibration of newly deposited molecules, producing low-energy, high-density glasses that are equivalent to liquid-cooled glasses aged for thousands of years. Free surfaces can accelerate chemical degradation of proteins. Measures for inhibiting surface-facilitated transformations include minimizing free surfaces, applying surface coatings, and preventing fracture.
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29
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Changes in dynamics of the glass-forming pharmaceutical nifedipine in binary mixtures with octaacetylmaltose. Eur J Pharm Biopharm 2015; 97:185-91. [DOI: 10.1016/j.ejpb.2015.09.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 09/17/2015] [Accepted: 09/21/2015] [Indexed: 11/20/2022]
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30
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Kaminska E, Tarnacka M, Wlodarczyk P, Jurkiewicz K, Kolodziejczyk K, Dulski M, Haznar-Garbacz D, Hawelek L, Kaminski K, Wlodarczyk A, Paluch M. Studying the Impact of Modified Saccharides on the Molecular Dynamics and Crystallization Tendencies of Model API Nifedipine. Mol Pharm 2015; 12:3007-19. [DOI: 10.1021/acs.molpharmaceut.5b00271] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. Kaminska
- Department
of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, ul. Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - M. Tarnacka
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - P. Wlodarczyk
- Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland
| | - K. Jurkiewicz
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - K. Kolodziejczyk
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M. Dulski
- Institute
of Material Science, University of Silesia, 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland
| | - D. Haznar-Garbacz
- Institute
of Pharmacy, Center of Drug Absorption and Targeting, Felix-Hausdorff-Strasse
3a, 17489 Greifswald, Germany
| | - L. Hawelek
- Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland
| | - K. Kaminski
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - A. Wlodarczyk
- Department
of Animal Histology and Embryology, University of Silesia, ul. Bankowa
9, 40-007 Katowice, Poland
| | - M. Paluch
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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31
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Gao Y, Olsen KW. Drug-polymer interactions at water-crystal interfaces and implications for crystallization inhibition: molecular dynamics simulations of amphiphilic block copolymer interactions with tolazamide crystals. J Pharm Sci 2015; 104:2132-41. [PMID: 26045147 DOI: 10.1002/jps.24442] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 02/04/2015] [Accepted: 03/12/2015] [Indexed: 11/08/2022]
Abstract
A diblock copolymer, poly(ethylene glycol)-block-poly(lactic acid) (PEG-b-PLA), modulates the crystal growth of tolazamide (TLZ), resulting in a crystal morphology change from needles to plates in aqueous media. To understand this crystal surface drug-polymer interaction, we conducted molecular dynamics simulations on crystal surfaces of TLZ in water containing PEG-b-PLA. A 130-ns simulation of the polymer in a large water box was run before initiating 50 ns simulations with each of the crystal surfaces. The simulations demonstrated differentiated drug-polymer interactions that are consistent with experimental studies. Interaction of PEG-b-PLA with the (001) face occurred more rapidly (≤10 ns) and strongly (total interaction energy of -121.1 kJ/mol/monomer) than that with the (010) face (∼35 ns, -85.4 kJ/mol/monomer). There was little interaction with the (100) face. Hydrophobic and van der Waals (VDW) interactions were the dominant forces, accounting for more than 90% of total interaction energies. It suggests that polymers capable of forming strong hydrophobic and VDW interactions might be more effective in inhibiting crystallization of poorly water-soluble and hydrophobic drugs in aqueous media (such as gastrointestinal fluid) than those with hydrogen-bonding capacities. Such in-depth analysis and understanding facilitate the rational selection of polymers in designing supersaturation-based enabling formulations.
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Affiliation(s)
- Yi Gao
- Department of Chemistry, Loyola University Chicago, Chicago, Illinois, 60660.,Manufacturing Science and Technology, Operations, AbbVie, Inc., North Chicago, Illinois, 60064
| | - Kenneth W Olsen
- Department of Chemistry, Loyola University Chicago, Chicago, Illinois, 60660
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32
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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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33
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Kothari K, Ragoonanan V, Suryanarayanan R. The Role of Polymer Concentration on the Molecular Mobility and Physical Stability of Nifedipine Solid Dispersions. Mol Pharm 2015; 12:1477-84. [DOI: 10.1021/mp500800c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Khushboo Kothari
- Department
of Pharmaceutics, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55445, United States
| | - Vishard Ragoonanan
- Department
of Pharmaceutics, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55445, United States
| | - Raj Suryanarayanan
- Department
of Pharmaceutics, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55445, United States
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34
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Zhang SW, Yu L, Huang J, Hussain MA, Derdour L, Qian F, de Villiers MM. A method to evaluate the effect of contact with excipients on the surface crystallization of amorphous drugs. AAPS PharmSciTech 2014; 15:1516-26. [PMID: 25037732 DOI: 10.1208/s12249-014-0178-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 06/30/2014] [Indexed: 11/30/2022] Open
Abstract
Amorphous drugs are used to improve the solubility, dissolution, and bioavailability of drugs. However, these metastable forms of drugs can transform into more stable, less soluble, crystalline counterparts. This study reports a method for evaluating the effect of commonly used excipients on the surface crystallization of amorphous drugs and its application to two model amorphous compounds, nifedipine and indomethacin. In this method, amorphous samples of the drugs were covered by excipients and stored in controlled environments. An inverted light microscope was used to measure in real time the rates of surface crystal nucleation and growth. For nifedipine, vacuum-dried microcrystalline cellulose and lactose monohydrate increased the nucleation rate of the β polymorph from two to five times when samples were stored in a desiccator, while D-mannitol and magnesium stearate increased the nucleation rate 50 times. At 50% relative humidity, the nucleation rates were further increased, suggesting that moisture played an important role in the crystallization caused by the excipients. The effect of excipients on the crystal growth rate was not significant, suggesting that contact with excipients influences the physical stability of amorphous nifedipine mainly through the effect on crystal nucleation. This effect seems to be drug specific because for two polymorphs of indomethacin, no significant change in the nucleation rate was observed under the excipients.
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Trasi NS, Baird JA, Kestur US, Taylor LS. Factors Influencing Crystal Growth Rates from Undercooled Liquids of Pharmaceutical Compounds. J Phys Chem B 2014; 118:9974-82. [PMID: 25076138 DOI: 10.1021/jp504450h] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Niraj S. Trasi
- Department of Industrial
and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Jared A. Baird
- Department of Industrial
and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Umesh S. Kestur
- Department of Industrial
and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Lynne S. Taylor
- Department of Industrial
and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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