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Fronza P, Batista MJPA, Franca AS, Oliveira LS. Bionanocomposite Based on Cassava Waste Starch, Locust Bean Galactomannan, and Cassava Waste Cellulose Nanofibers. Foods 2024; 13:202. [PMID: 38254503 PMCID: PMC10814067 DOI: 10.3390/foods13020202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/27/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
Natural polysaccharides are among the renewable sources with great potential for replacing petroleum-derived chemicals as precursors to produce biodegradable films. This study aimed to prepare biopolymeric films using starch extracted from the periderm and cortex of cassava roots (waste from cassava root processing), locust bean galactomannan, and cellulose nanofibers also obtained from cassava waste. The films were prepared by casting, and their physicochemical, mechanical, and biodegradability properties were evaluated. The content of cellulose nanofibers varied from 0.5 to 2.5%. Although the addition of cellulose nanofibers did not alter the mechanical properties of the films, it significantly enhanced the vapor barrier of the films (0.055 g mm/m2 h kPa-2.5% nanofibers) and their respective stabilities in aqueous acidic and alkaline media. All prepared films were biodegradable, with complete degradation occurring within five days. The prepared films were deemed promising alternatives for minimizing environmental impacts caused by the disposal of petroleum-derived materials.
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Affiliation(s)
- Pãmella Fronza
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
| | - Michelle J. P. A. Batista
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
| | - Adriana S. Franca
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
- Departamento de Engenharia Mecânica, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Leandro S. Oliveira
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
- Departamento de Engenharia Mecânica, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
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2
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Al-Ani A, Szell PMJ, Rehman Z, Blade H, Wheatcroft HP, Hughes LP, Brown SP, Wilson CC. Combining X-ray and NMR Crystallography to Explore the Crystallographic Disorder in Salbutamol Oxalate. CRYSTAL GROWTH & DESIGN 2022; 22:4696-4707. [PMID: 35971412 PMCID: PMC9374327 DOI: 10.1021/acs.cgd.1c01093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Salbutamol is an active pharmaceutical ingredient commonly used to treat respiratory distress and is listed by the World Health Organization as an essential medicine. Here, we establish the crystal structure of its oxalate form, salbutamol oxalate, and explore the nature of its crystallographic disorder by combined X-ray crystallography and 13C cross-polarization (CP) magic-angle spinning (MAS) solid-state NMR. The *C-OH chiral center of salbutamol (note that the crystal structures are a racemic mixture of the two enantiomers of salbutamol) is disordered over two positions, and the tert-butyl group is rotating rapidly, as revealed by 13C solid-state NMR. The impact of crystallization conditions on the disorder was investigated, finding variations in the occupancy ratio of the *C-OH chiral center between single crystals and a consistency across samples in the bulk powder. Overall, this work highlights the contrast between investigating crystallographic disorder by X-ray diffraction and solid-state NMR experiment, and gauge-including projector-augmented-wave (GIPAW) density functional theory (DFT) calculations, with their combined use, yielding an improved understanding of the nature of the crystallographic disorder between the local (i.e., as viewed by NMR) and longer-range periodic (i.e., as viewed by diffraction) scale.
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Affiliation(s)
- Aneesa
J. Al-Ani
- Centre
for Sustainable and Circular Technologies (CSCT), University of Bath, Claverton Down, Bath BA2
7AY, U.K.
| | | | - Zainab Rehman
- Department
of Physics, University of Warwick, Coventry CV4 7AL, U.K.
| | - Helen Blade
- Oral
Product Development, Pharmaceutical Technology & Development,
Operations, AstraZeneca, Macclesfield SK10 2NA, U.K.
| | - Helen P. Wheatcroft
- Chemical
Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K.
| | - Leslie P. Hughes
- Oral
Product Development, Pharmaceutical Technology & Development,
Operations, AstraZeneca, Macclesfield SK10 2NA, U.K.
| | - Steven P. Brown
- Department
of Physics, University of Warwick, Coventry CV4 7AL, U.K.
| | - Chick C. Wilson
- Centre
for Sustainable and Circular Technologies (CSCT), University of Bath, Claverton Down, Bath BA2
7AY, U.K.
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3
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Mathew R, Sergeyev IV, Aussenac F, Gkoura L, Rosay M, Baias M. Complete resonance assignment of a pharmaceutical drug at natural isotopic abundance from DNP-Enhanced solid-state NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2022; 119:101794. [PMID: 35462269 DOI: 10.1016/j.ssnmr.2022.101794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 06/14/2023]
Abstract
Solid-state dynamic nuclear polarization enhanced magic angle spinning (DNP-MAS) NMR measurements coupled with density functional theory (DFT) calculations enable the full resonance assignment of a complex pharmaceutical drug molecule without the need for isotopic enrichment. DNP dramatically enhances the NMR signals, thereby making possible previously intractable two-dimensional correlation NMR spectra at natural abundance. Using inputs from DFT calculations, herein we describe a significant improvement to the structure elucidation process for complex organic molecules. Further, we demonstrate that a series of two-dimensional correlation experiments, including 15N-13C TEDOR, 13C-13C INADEQUATE/SARCOSY, 19F-13C HETCOR, and 1H-13C HETCOR, can be obtained at natural isotopic abundance within reasonable experiment times, thus enabling a complete resonance assignment of sitagliptin, a pharmaceutical used for the treatment of type 2 diabetes.
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Affiliation(s)
- Renny Mathew
- Division of Science, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Ivan V Sergeyev
- Bruker Biospin Corporation, 15 Fortune Drive, Billerica, MA, USA
| | - Fabien Aussenac
- Bruker France, 34 rue de l'industrie, 67166, Wissembourg, France.
| | - Lydia Gkoura
- Division of Science, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates.
| | - Melanie Rosay
- Bruker Biospin Corporation, 15 Fortune Drive, Billerica, MA, USA
| | - Maria Baias
- Division of Science, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
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4
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Szell PMJ, Nilsson Lill SO, Blade H, Brown SP, Hughes LP. A toolbox for improving the workflow of NMR crystallography. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2021; 116:101761. [PMID: 34736104 DOI: 10.1016/j.ssnmr.2021.101761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/04/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
NMR crystallography is a powerful tool with applications in structural characterization and crystal structure verification, to name two. However, applying this tool presents several challenges, especially for industrial users, in terms of consistency, workflow, time consumption, and the requirement for a high level of understanding of experimental solid-state NMR and GIPAW-DFT calculations. Here, we have developed a series of fully parameterized scripts for use in Materials Studio and TopSpin, based on the .magres file format, with a focus on organic molecules (e.g. pharmaceuticals), improving efficiency, robustness, and workflow. We separate these tools into three major categories: performing the DFT calculations, extracting & visualizing the results, and crystallographic modelling. These scripts will rapidly submit fully parameterized CASTEP jobs, extract data from the calculations, assist in visualizing the results, and expedite the process of structural modelling. Accompanied with these tools is a description on their functionality, documentation on how to get started and use the scripts, and links to video tutorials for guiding new users. Through the use of these tools, we hope to facilitate NMR crystallography and to harmonize the process across users.
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Affiliation(s)
| | - Sten O Nilsson Lill
- Early Product Development and Manufacturing, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Helen Blade
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - Steven P Brown
- Department of Physics, University of Warwick, Coventry, CV4 7AL, UK.
| | - Leslie P Hughes
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK.
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Santi S, Mancini I, Dirè S, Callone E, Speranza G, Pugno N, Migliaresi C, Motta A. A Bio-inspired Multifunctionalized Silk Fibroin. ACS Biomater Sci Eng 2021; 7:507-516. [PMID: 33476122 DOI: 10.1021/acsbiomaterials.0c01567] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A bio-inspired multifunctionalized silk fibroin (BMS) was synthesized in order to mimic the interaction of nidogen with the type IV collagen and laminin of basement membranes. The designed BMS consists of a motif of laminin α-chain-derived, called IK peptide, and type IV collagen covalently bound to the silk fibroin (SF) by using EDC/NHS coupling and a Cu-free click chemistry reaction, respectively. Silk fibroin was chosen as the main component of the BMS because it is versatile and biocompatible, induces an in vivo favorable bioresponse, and moreover can be functionalized with different methods. The chemical structure of BMS was analyzed by using X-ray photoelectron spectroscopy, attenuated total reflection-Fourier transform infrared, cross-polarization magic angle spinning nuclear magnetic resonance techniques, and colorimetric assay. The SF and BMS solutions were cross-linked by sonication to form hydrogels or casted to make films in order to evaluate and compare the early adhesion and viability of MRC5 cells. BMS hydrogels were also characterized by rheological and thermal analyses.
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Affiliation(s)
- Sofia Santi
- Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.,BIOTech Research Center, University of Trento, via delle Regole 101, 38123 Trento, Italy
| | - Ines Mancini
- Laboratory of Bioorganic Chemistry, Department of Physics, University of Trento, via Sommarive 14, 38123 Trento, Italy
| | - Sandra Dirè
- Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.,"Klaus Mueller" Magnetic Resonance Laboratory, Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Emanuela Callone
- Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.,"Klaus Mueller" Magnetic Resonance Laboratory, Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Giorgio Speranza
- Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.,FBK-irst, Via Sommarive 18, Povo, 38123 Trento, Italy.,IFN - CNR, CSMFO Lab. & FBK CMM, via alla Cascata, 56/C Povo, 38123 Trento, Italy
| | - Nicola Pugno
- Laboratory of Bio-Inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, 38123 Trento, Italy.,School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, E1-4NS London, United Kingdom
| | - Claudio Migliaresi
- Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.,BIOTech Research Center, University of Trento, via delle Regole 101, 38123 Trento, Italy
| | - Antonella Motta
- Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.,BIOTech Research Center, University of Trento, via delle Regole 101, 38123 Trento, Italy
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Szell PMJ, Brown SP, Hughes LP, Blade H, Nilsson Lill SO. A curious case of dynamic disorder in pyrrolidine rings elucidated by NMR crystallography. Chem Commun (Camb) 2020; 56:14039-14042. [PMID: 33103694 DOI: 10.1039/d0cc05236a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pharmaceutical exhibits differing dynamics in crystallographically distinct pyrrolidine rings despite being nearly related by symmetry, with one performing ring inversions while the other is constrained to torsional librations. Using 13C solid-state magic-angle spinning (MAS) NMR and DFT calculations, we show that this contrast originates from C-HH-C close contacts and less efficient C-Hπ intermolecular interactions observed in the transition state of the constrained pyrrolidine ring, highlighting the influence of the crystallographic environment on the molecular motion.
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Affiliation(s)
- Patrick M J Szell
- Department of Physics, University of Warwick, Coventry, CV4 7AL, UK.
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Mazurek AH, Szeleszczuk Ł, Pisklak DM. Periodic DFT Calculations-Review of Applications in the Pharmaceutical Sciences. Pharmaceutics 2020; 12:E415. [PMID: 32369915 PMCID: PMC7284980 DOI: 10.3390/pharmaceutics12050415] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 12/31/2022] Open
Abstract
In the introduction to this review the complex chemistry of solid-state pharmaceutical compounds is summarized. It is also explained why the density functional theory (DFT) periodic calculations became recently so popular in studying the solid APIs (active pharmaceutical ingredients). Further, the most popular programs enabling DFT periodic calculations are presented and compared. Subsequently, on the large number of examples, the applications of such calculations in pharmaceutical sciences are discussed. The mentioned topics include, among others, validation of the experimentally obtained crystal structures and crystal structure prediction, insight into crystallization and solvation processes, development of new polymorph synthesis ways, and formulation techniques as well as application of the periodic DFT calculations in the drug analysis.
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Affiliation(s)
| | - Łukasz Szeleszczuk
- Chair and Department of Physical Pharmacy and Bioanalysis, Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 str., 02-093 Warsaw, Poland; (A.H.M.); (D.M.P.)
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