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Lightowler M, Li S, Ou X, Cho J, Liu B, Li A, Hofer G, Xu J, Yang T, Zou X, Lu M, Xu H. Phase Identification and Discovery of an Elusive Polymorph of Drug-Polymer Inclusion Complex Using Automated 3D Electron Diffraction. Angew Chem Int Ed Engl 2024; 63:e202317695. [PMID: 38380831 DOI: 10.1002/anie.202317695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 02/22/2024]
Abstract
3D electron diffraction (3D ED) has shown great potential in crystal structure determination in materials, small organic molecules, and macromolecules. In this work, an automated, low-dose and low-bias 3D ED protocol has been implemented to identify six phases from a multiple-phase melt-crystallisation product of an active pharmaceutical ingredient, griseofulvin (GSF). Batch data collection under low-dose conditions using a widely available commercial software was combined with automated data analysis to collect and process over 230 datasets in three days. Accurate unit cell parameters obtained from 3D ED data allowed direct phase identification of GSF Forms III, I and the known GSF inclusion complex (IC) with polyethylene glycol (PEG) (GSF-PEG IC-I), as well as three minor phases, namely GSF Forms II, V and an elusive new phase, GSF-PEG IC-II. Their structures were then directly determined by 3D ED. Furthermore, we reveal how the stabilities of the two GSF-PEG IC polymorphs are closely related to their crystal structures. These results demonstrate the power of automated 3D ED for accurate phase identification and direct structure determination of complex, beam-sensitive crystallisation products, which is significant for drug development where solid form screening is crucial for the overall efficacy of the drug product.
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Affiliation(s)
- Molly Lightowler
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
| | - Shuting Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Xiao Ou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Jungyoun Cho
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
| | - Binbin Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Ao Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Gerhard Hofer
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
| | - Jiaoyan Xu
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
| | - Taimin Yang
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
| | - Xiaodong Zou
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
| | - Ming Lu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Hongyi Xu
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden
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Liu B, Li C, Chen Z, Ou X, Li S, Li A, Chen P, Lu M. Molecular insights into the formation of drug-polymer inclusion complex. Int J Pharm 2024; 652:123761. [PMID: 38184024 DOI: 10.1016/j.ijpharm.2023.123761] [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: 11/17/2023] [Revised: 12/19/2023] [Accepted: 12/30/2023] [Indexed: 01/08/2024]
Abstract
Drug-polymer inclusion complex (IC) has been viewed as a novel solid form of drugs for property modification. Nonetheless, our understanding of the formation mechanism remains limited. This work aims to provide insight into the molecular processes governing the structural construction of carbamazepine (CBZ) and griseofulvin (GSF) channel-type ICs in the presence of guest polymers. Leveraging microdroplet melt crystallization, we successfully unveiled the single-crystal structures of these ICs, enabling structural analysis, density functional theory calculations, and molecular dynamics simulations. The results collectively elucidate the disparity between CBZ and GSF channels in terms of their autonomy in the absence of guest polymers. CBZ molecules can spontaneously assemble into stable channel structures independently, capitalizing on their unique mortise-tenon architecture and robust π…π interactions. Conversely, GSF channels lack sufficient support from weak Cl…O and C-H…π intermolecular interactions and necessitate the insertion of guest molecules to stabilize their structures. We further calculated the eleven structurally determined drug-polymer ICs and found that their channel sizes consistently fall within a narrow range of 3.81-5.18 Å although they adopt diverse approaches to construct channel structures. We anticipate that these findings will inspire continued exploration of this novel solid form, facilitating theoretical predictions and practical applications in pharmaceutical development.
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Affiliation(s)
- Binbin Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Changrui Li
- Guangzhou Zhixin High School, 152 Zhixin South Road, Guangzhou 510080, China
| | - Ziqiao Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiao Ou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Shuting Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Ao Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Pin Chen
- National Supercomputer Center in Guangzhou, School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China.
| | - Ming Lu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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Forster SP, Dippold E, Chiang T. Twin-Screw Melt Granulation for Oral Solid Pharmaceutical Products. Pharmaceutics 2021; 13:pharmaceutics13050665. [PMID: 34066332 PMCID: PMC8148162 DOI: 10.3390/pharmaceutics13050665] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/23/2021] [Accepted: 04/27/2021] [Indexed: 12/16/2022] Open
Abstract
This article highlights the advantages of pharmaceutical continuous melt granulation by twin-screw extrusion. The different melt granulation process options and excipients are described and compared, and a case is made for expanded use of twin-screw melt granulation since it is a flexible and continuous process. Methods for binder selection are profiled with a focus on rheology and physical stability impacts. For twin-screw melt granulation, the mechanism of granulation and process impact on granule properties are described. Pharmaceutical applications of melt granulation ranging from immediate release of soluble and insoluble APIs, taste-masking, and sustained release formulation are reviewed, demonstrating the range of possibilities afforded by twin-screw melt granulation.
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Chen L, Huang Y. The guest polymer effect on the dissolution of drug–polymer crystalline inclusion complexes. RSC Adv 2021; 11:13091-13096. [PMID: 35423840 PMCID: PMC8697331 DOI: 10.1039/d1ra01926k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 03/29/2021] [Indexed: 11/21/2022] Open
Abstract
A drug–polymer crystalline inclusion complex (IC) is a novel solid form of drug, in which drug molecules form parallel channels, and linear polymer chains reside in these channels. In this study, we used carbamazepine (CBZ) as a model drug, and directly studied the effect of different types of guest polymers on the dissolution properties of drug–polymer ICs. We successfully prepared ICs formed from CBZ with hydrophilic poly(ethylene glycol) (PEG) and hydrophobic poly(ε-caprolactone) (PCL), respectively, and confirmed that these two drug–polymer ICs both had the same channel-type crystal structure as CBZ form II. During the dissolution test, CBZ–PEG IC showed a faster dissolution rate compared to CBZ form II under both sink and non-sink conditions. CBZ–PCL IC was confirmed to be more stable in aqueous medium, as the guest polymer PCL delayed its transformation to less-soluble crystals during dissolution. Guest polymers have significant influence on the dissolution of drug–polymer inclusion complex crystals.![]()
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Affiliation(s)
- Lu Chen
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Yanbin Huang
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
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Xu X, Siddiqui A, Srinivasan C, Mohammad A, Rahman Z, Korang-Yeboah M, Feng X, Khan M, Ashraf M. Evaluation of Abuse-Deterrent Characteristics of Tablets Prepared via Hot-Melt Extrusion. AAPS PharmSciTech 2019; 20:230. [PMID: 31227939 DOI: 10.1208/s12249-019-1448-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 06/03/2019] [Indexed: 01/28/2023] Open
Abstract
In this study, the effect of formulation variables and process parameters on the abuse-deterrent (AD) characteristics of a matrix tablet manufactured using hot-melt extrusion (HME) was investigated. The formulation variables included polyethylene oxide (PEO) grades and its input level, while the HME process parameters varied were barrel temperature profile and die diameter. Depending on the diameter of the extrudate (2.5 mm or 5.0 mm), two different downstream processes were used to prepare the tablets: cryo-milling followed by compression for the 2.5 mm extrudate, and cutting followed by compression for the 5.0 mm extrudate. A D-optimal statistical design was used to evaluate the impact of formulation and process parameters on various responses, including tablet physical strength, particle size after manipulation, syringeability and injectability, solution viscosity, extractability in solvents, and dissolution rates. It was found that the post-HME extrusion processing method played a critical role in affecting the AD characteristics of abuse-deterrent formulations, likely through changing the tablet compactability and porosity. When the extrudates were cryo-milled-compressed, the tablets could be readily manipulated by milling, which led to high degree of extractability. Under high alcohol concentration, burst drug release was observed for the tablets compressed from cryo-milled extrudates. Additionally, heat exposure during HME process caused significant drop in PEO solution viscosity, likely due to thermal degradation.
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Effect of Particle Size and Polymer Loading on Dissolution Behavior of Amorphous Griseofulvin Powder. J Pharm Sci 2019; 108:234-242. [DOI: 10.1016/j.xphs.2018.11.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/25/2018] [Accepted: 11/14/2018] [Indexed: 11/23/2022]
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Zhong Z, Yang X, Wang BH, Yao YF, Guo B, Yu L, Huang Y, Xu J. Solvent-polymer guest exchange in a carbamazepine inclusion complex: structure, kinetics and implication for guest selection. CrystEngComm 2019. [DOI: 10.1039/c8ce01766b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent–polymer guest exchange in a carbamazepine inclusion complex in a stirred solution was studied and a mechanism was proposed.
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Affiliation(s)
- Zhi Zhong
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Xiaotong Yang
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Bi-Heng Wang
- Physics Department and Shanghai Key Laboratory of Magnetic Resonance
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
- China
| | - Ye-Feng Yao
- Physics Department and Shanghai Key Laboratory of Magnetic Resonance
- School of Physics and Materials Science
- East China Normal University
- Shanghai 200062
- China
| | - Baohua Guo
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Lian Yu
- School of Pharmacy and Department of Chemistry
- University of Wisconsin-Madison
- Madison
- USA
| | - Yanbin Huang
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Jun Xu
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
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Yang X, Yu B, Zhong Z, Guo BH, Huang Y. Nevirapine-polycaprolactone crystalline inclusion complex as a potential long-acting injectable solid form. Int J Pharm 2018; 543:121-129. [DOI: 10.1016/j.ijpharm.2018.03.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/08/2018] [Accepted: 03/24/2018] [Indexed: 11/16/2022]
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Yang X, Zhong Z, Xu J, Huang Y. Drug-polymer inclusion complex as a new pharmaceutical solid form. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.09.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhong Z, Yang X, Fu XB, Yao YF, Guo BH, Huang Y, Xu J. Crystalline inclusion complexes formed between the drug diflunisal and block copolymers. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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