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Exploring Taxifolin Polymorphs: Insights on Hydrate and Anhydrous Forms. Pharmaceutics 2021; 13:pharmaceutics13091328. [PMID: 34575404 PMCID: PMC8469002 DOI: 10.3390/pharmaceutics13091328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/19/2021] [Accepted: 08/20/2021] [Indexed: 11/16/2022] Open
Abstract
Taxifolin, also known as dihydroquercetin, possesses several interesting biological properties. The purpose of the study was to identify polymorphs of taxifolin prepared using crystallization in different solvents. Data from X-ray powder diffraction, differential scanning calorimetry, and thermogravimetry enabled us to detect six different crystalline phases for taxifolin. Besides the already known fully hydrated phase, one partially hydrated phase, one monohydrated phase, two anhydrous polymorphs, and one probably solvated phase were obtained. The unit cell parameters were defined for three of them, while one anhydrous polymorph was fully structurally characterized by X-ray powder diffraction data. Scanning electron microscopy and hot stage microscopy were also employed to characterize the crystallized taxifolin powders. The hydrate and anhydrous forms showed remarkable stability in drastic storage conditions, and their solubility was deeply evaluated. The anhydrous form converted into the hydrate form during the equilibrium solubility study and taxifolin equilibrium solubility was about 1.2 mg/mL. The hydrate taxifolin intrinsic dissolution rate was 56.4 μg cm-2 min-1. Using Wood's apparatus, it was not possible to determine the intrinsic dissolution rate of anhydrous taxifolin that is expected to solubilize more rapidly than the hydrate form. In view of its high stability, its use can be hypothesized.
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Hong RS, Mattei A, Sheikh AY, Bhardwaj RM, Bellucci MA, McDaniel KF, Pierce MO, Sun G, Li S, Wang L, Mondal S, Ji J, Borchardt TB. Novel Physics-Based Ensemble Modeling Approach That Utilizes 3D Molecular Conformation and Packing to Access Aqueous Thermodynamic Solubility: A Case Study of Orally Available Bromodomain and Extraterminal Domain Inhibitor Lead Optimization Series. J Chem Inf Model 2021; 61:1412-1426. [PMID: 33661005 DOI: 10.1021/acs.jcim.0c01410] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Drug design with patient centricity for ease of administration and pill burden requires robust understanding of the impact of chemical modifications on relevant physicochemical properties early in lead optimization. To this end, we have developed a physics-based ensemble approach to predict aqueous thermodynamic crystalline solubility, with a 2D chemical structure as the input. Predictions for the bromodomain and extraterminal domain (BET) inhibitor series show very close match (0.5 log unit) with measured thermodynamic solubility for cases with low crystal anisotropy and good match (1 log unit) for high anisotropy structures. The importance of thermodynamic solubility is clearly demonstrated by up to a 4 log unit drop in solubility compared to kinetic (amorphous) solubility in some cases and implications thereof, for instance on human dose. We have also demonstrated that incorporating predicted crystal structures in thermodynamic solubility prediction is necessary to differentiate (up to 4 log unit) between solubility of molecules within the series. Finally, our physics-based ensemble approach provides valuable structural insights into the origins of 3-D conformational landscapes, crystal polymorphism, and anisotropy that can be leveraged for both drug design and development.
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Affiliation(s)
- Richard S Hong
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
| | - Alessandra Mattei
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
| | - Ahmad Y Sheikh
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
| | - Rajni Miglani Bhardwaj
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
| | - Michael A Bellucci
- XtalPi, Inc., 245 Main Street, Cambridge, Massachusetts 02142, United States
| | - Keith F McDaniel
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
| | - M Olivia Pierce
- Schrödinger Inc., 120 W 45th Street, New York, New York 10036, United States
| | - Guangxu Sun
- XtalPi, Inc., 245 Main Street, Cambridge, Massachusetts 02142, United States
| | - Sizhu Li
- XtalPi, Inc., 245 Main Street, Cambridge, Massachusetts 02142, United States
| | - Lingle Wang
- Schrödinger Inc., 120 W 45th Street, New York, New York 10036, United States
| | - Sayan Mondal
- Schrödinger Inc., 120 W 45th Street, New York, New York 10036, United States
| | - Jianguo Ji
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
| | - Thomas B Borchardt
- Research & Development, AbbVie Inc., 1 N Waukegan Road, North Chicago, Illinois 60064, United States
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Beiginejad H. Dependence of mechanism to thermodynamics in electrochemical oxidation of acetaminophen in the presence of different nucleophiles. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Recent progress of structural study of polymorphic pharmaceutical drugs. Adv Drug Deliv Rev 2017; 117:71-85. [PMID: 27940141 DOI: 10.1016/j.addr.2016.12.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/02/2016] [Accepted: 12/06/2016] [Indexed: 12/20/2022]
Abstract
This review considers advances in the understanding of active pharmaceutical ingredient polymorphism since around 2010 mainly from a structural view point, with a focus on twelve model drugs. New polymorphs of most of these drugs have been identified despite that the polymorphism of these old drugs has been extensively studied so far. In addition to the conventional modifications of preparative solvents, temperatures, and pressure, more strategic structure-based methods have successfully yielded new polymorphs. The development of analytical techniques, including X-ray analyses, spectroscopy, and microscopy has facilitated the identification of unknown crystal structures and also the discovery of new polymorphs. Computational simulations have played an important role in explaining and predicting the stability order of polymorphs. Furthermore, these make significant contributions to the design of new polymorphs by considering structure and energy. The new technologies and insights discussed in this review will contribute to the control of polymorphic forms, both during manufacture and in the drug formulation.
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Parks C, Huang L, Wang Y, Ramkrishna D. Accelerating multiple replica molecular dynamics simulations using the Intel® Xeon Phi™ coprocessor. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1301666] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Conor Parks
- School of Chemical Engineering, Purdue University, West Lafayette, IN, USA
| | - Lei Huang
- Texas Advanced Computing Center, The University of Texas at Austin, Austin, TX, USA
| | - Yang Wang
- Texas Advanced Computing Center, The University of Texas at Austin, Austin, TX, USA
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Fischer F, Fendel N, Greiser S, Rademann K, Emmerling F. Impact Is Important—Systematic Investigation of the Influence of Milling Balls in Mechanochemical Reactions. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.6b00435] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Franziska Fischer
- BAM Federal Institute for Materials Research and Testing, R.-Willstätter-Str. 11, 12489 Berlin, Germany
- Humboldt-Universität zu Berlin, B.-Taylor-Str.
2, 12489 Berlin, Germany
| | - Nicole Fendel
- BAM Federal Institute for Materials Research and Testing, R.-Willstätter-Str. 11, 12489 Berlin, Germany
- Humboldt-Universität zu Berlin, B.-Taylor-Str.
2, 12489 Berlin, Germany
| | - Sebastian Greiser
- BAM Federal Institute for Materials Research and Testing, R.-Willstätter-Str. 11, 12489 Berlin, Germany
- Humboldt-Universität zu Berlin, B.-Taylor-Str.
2, 12489 Berlin, Germany
| | - Klaus Rademann
- BAM Federal Institute for Materials Research and Testing, R.-Willstätter-Str. 11, 12489 Berlin, Germany
- Humboldt-Universität zu Berlin, B.-Taylor-Str.
2, 12489 Berlin, Germany
| | - Franziska Emmerling
- BAM Federal Institute for Materials Research and Testing, R.-Willstätter-Str. 11, 12489 Berlin, Germany
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Parks C, Koswara A, Tung HH, Nere NK, Bordawekar S, Nagy ZK, Ramkrishna D. Nanocrystal Dissolution Kinetics and Solubility Increase Prediction from Molecular Dynamics: The Case of α-, β-, and γ-Glycine. Mol Pharm 2017; 14:1023-1032. [PMID: 28271901 DOI: 10.1021/acs.molpharmaceut.6b00882] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Conor Parks
- School
of Chemical Engineering, Purdue University, 480 West Stadium Mall, West Lafayette, Indiana 47907, United States
| | - Andy Koswara
- School
of Chemical Engineering, Purdue University, 480 West Stadium Mall, West Lafayette, Indiana 47907, United States
| | - Hsien-Hsin Tung
- Process Research & Development, AbbVie, Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Nandkishor K. Nere
- Process Research & Development, AbbVie, Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Shailendra Bordawekar
- Process Research & Development, AbbVie, Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Zoltan K. Nagy
- School
of Chemical Engineering, Purdue University, 480 West Stadium Mall, West Lafayette, Indiana 47907, United States
| | - Doraiswami Ramkrishna
- School
of Chemical Engineering, Purdue University, 480 West Stadium Mall, West Lafayette, Indiana 47907, United States
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