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qNMR as an analytical technique for essential oils: quantitative analysis of Eucalyptus tereticornis leaf oil. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02700-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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2
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Mansour NM, El-Sherbiny DT, Ibrahim FA, El-Subbagh HI. Taguchi Approach for Optimization of a Green Quantitative 1H-NMR Practice for Characterization of Levetiracetam and Brivaracetam in Pharmaceuticals. J AOAC Int 2022; 105:1516-1527. [DOI: 10.1093/jaoacint/qsac077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 05/25/2022] [Accepted: 06/08/2022] [Indexed: 11/13/2022]
Abstract
Abstract
Background
Recently, quantitative nuclear magnetic resonance (qNMR) competes with separation techniques such as high performance liquid chromatography (HPLC) and capillary electrophoresis for quantification purposes when dealing with molecules that lack a chromophore.
Objective
The advantages of the proton nuclear magnetic resonance spectroscopy as a revolutionary quantitative analysis method were exploited aimed at simple and green assessment of two racetams, namely levetiracetam (LEV) and brivaracetam (BRV), as a new family of antiepileptic medications with a unique mechanism of action. The developed technique was effectively used to determine LEV in Keppra tablets and BRV in laboratory-prepared tablets without interfering with the ordinarily suspected excipients.
Method
A Taguchi approach was applied as a powerful and user-friendly statistical technique for optimization of the qH1NMR experimental design for both drugs. The optimum acquisition conditions were number of scans 32, pulse angle 20°, and relaxation delay of 40 s for LEV and number of scans 128, pulse angle 90°, and relaxation delay of 1 s for BRV. NMR spectra were obtained by means of phloroglucinol as an internal standard and dimethyl sulfoxide-d6 as a solvent.
Results
The diagnostic doublet of doublet quantitative signals at 4.3 and at 4.2 ppm were chosen to estimate LEV and BRV, respectively. The recovery of both drugs was quantified through the range of 0.1–12 mg/mL. The limits of detection were 0.013, 0.0013 and the limits of quantitation were 0.04, 0.0039 mg/mL for LEV and BRV correspondingly.
Conclusions
The suggested technique was fully validated according to ICH guidelines and proved to be an eco-friendly practice by means of three different assessment tools, including the green analytical procedures index, national environmental methods index, and analytical eco-scale. qH1NMR should be considered a green alternative for quantification and quality control assessment of pharmaceuticals.
Highlights
This research represents the first simple, quick, and green alternative method for determination of both racetams in their pharmaceuticals.
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Affiliation(s)
- Noura M Mansour
- University of Mansoura, Faculty of Pharmacy, Department of Medicinal Chemistry , Mansoura 35516, Egypt
- Delta University for Science and Technology, Faculty of Pharmacy, Department of Pharmaceutical Chemistry , Gamasa 35712, Egypt
| | - Dina T El-Sherbiny
- University of Mansoura, Faculty of Pharmacy, Department of Medicinal Chemistry , Mansoura 35516, Egypt
- Delta University for Science and Technology, Faculty of Pharmacy, Department of Pharmaceutical Chemistry , Gamasa 35712, Egypt
| | - Fawzia A Ibrahim
- Mansoura University, Faculty of Pharmacy, Department of Analytical Chemistry , Mansoura 35516, Egypt
| | - Hussein I El-Subbagh
- University of Mansoura, Faculty of Pharmacy, Department of Medicinal Chemistry , Mansoura 35516, Egypt
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3
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Achanta PS, Niemitz M, Friesen JB, Tadjimukhamedov FK, Bzhelyansky A, Giancaspro GI, Chen SN, Pauli GF. Pharmaceutical analysis by NMR can accommodate strict impurity thresholds: The case of choline. J Pharm Biomed Anal 2022; 214:114709. [PMID: 35339885 DOI: 10.1016/j.jpba.2022.114709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/23/2022] [Accepted: 03/03/2022] [Indexed: 11/19/2022]
Abstract
The ICH guidelines recommend reporting thresholds for regular impurities in drug substances at the level of 0.05% or 0.03% (w/w) depending on the maximum daily intake. Therefore, any instrumental method of analysis applicable to the impurity analysis should be able to detect and quantify the analytes at those levels. This investigation was designed to verify the suitability of 1H NMR spectroscopy for the detection of impurities, as a first step in the process before attempting quantification. In order to minimize demand on equipment, this study employed a 400 MHz instrument for structural confirmation and signal assignments of choline (1) and O-(2-hydroxyethyl)choline (2), a known impurity. The limit of detection (LOD) of 2 in 10 mg of 1 was established as 0.01% on a 400 MHz instrument and 2% on a 60 MHz (benchtop) NMR spectrometer. Thus, impurities for which quantification is required are readily detected at 400 MHz or above. These results are in contrast to the widespread belief that 1H NMR sensitivity is insufficient for pharmaceutical impurity analysis. The choice of solvent was recognized as a critical parameter for 1H NMR LOD analysis. Furthermore, publicly available NMR raw data (HMDB) proved to be valuable for unveiling the otherwise cryptic information hidden in complex signal patterns via 1H NMR iterative Full Spin Analysis. Finally, the study uncovered the less noticed, yet characteristic, 14N-1H coupling in the -N+(CH3)3 groups, adding strong arguments for the Raw NMR Data Initiative. Collectively, the data prove that the analytical capabilities of high-field NMR easily fulfill the ICH requirements for detection of impurity in the presence of an actual substance of interest which makes it a step closer to achieving regulatory standards.
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Affiliation(s)
- Prabhakar S Achanta
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Pharmacognosy Institute, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA
| | - Matthias Niemitz
- NMR Solutions Limited, Tulliportinkatu 3 A 8, 70100 Kuopio, Finland
| | - J Brent Friesen
- Pharmacognosy Institute, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Physical Sciences Department, Rosary College of Arts and Sciences, Dominican University, 7900 West Division Street, River Forest, IL 60305, USA
| | | | - Anton Bzhelyansky
- The United States Pharmacopeial Convention, 12601 Twinbrook Pkwy, Rockville, MD 20852, USA
| | - Gabriel I Giancaspro
- The United States Pharmacopeial Convention, 12601 Twinbrook Pkwy, Rockville, MD 20852, USA
| | - Shao-Nong Chen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Pharmacognosy Institute, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA
| | - Guido F Pauli
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Pharmacognosy Institute, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA.
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4
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Silva RCDA, de Sousa EGR, Mazzei JL, de Carvalho EM. Quantitative 1H NMR method for analyzing primaquine diphosphate in active pharmaceutical ingredients. J Pharm Biomed Anal 2022; 210:114585. [PMID: 35042143 DOI: 10.1016/j.jpba.2022.114585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 12/22/2021] [Accepted: 01/05/2022] [Indexed: 11/28/2022]
Abstract
Thermal analysis, Fourier Transform IR, the isotropic chemical shift of 1H NMR in different solvents, their temperature dependence and spin-lattice relaxation time constant (T1), solution 1D and 2D NMR, and solid-state 13C and 31P NMR (magic angle spinning NMR) were employed to obtain full information and elucidate the structures of primaquine diphosphate (PQD) samples used for quality controlling malaria medicines. Additionally, a simple, rapid, specific, and reliable quantitative method (qNMR) was developed to determine the PQD level in the raw material of active pharmaceutical ingredients (APIs). The method was developed using ethylene carbonate (EC) as the internal standard and dimethylsulfoxide-d6 (DMSO-d6) as the NMR solvent. For the API qNMR, 1H NMR signals at 3.82 and 1.22 ppm were used. The qNMR methodology, through the linearity, range, LOD and LOQ, stability, precision, robustness, and accuracy, was validated within the requirements of guidelines. The accuracy of the qNMR was evaluated by comparing it to a pharmacopeial HPLC technique and there were no statistical differences (p > 0.05). The proposed qNMR method authentically supports and endorses the current pharmacopoeial methods used for determining the PQD content.
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Affiliation(s)
- Rafaella C de A Silva
- Fundação Oswaldo Cruz, Farmanguinhos, Rua Sizenando Nabuco, 100, Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil
| | - Eduardo G R de Sousa
- Fundação Oswaldo Cruz, Farmanguinhos, Rua Sizenando Nabuco, 100, Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil
| | - José Luiz Mazzei
- Fundação Oswaldo Cruz, Farmanguinhos, Rua Sizenando Nabuco, 100, Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil
| | - Erika M de Carvalho
- Fundação Oswaldo Cruz, Farmanguinhos, Rua Sizenando Nabuco, 100, Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil; Fundação Oswaldo Cruz, Vice-Presidência de Produção e Inovação em Saúde, Avenida Brasil, 4365. Manguinhos, 21040-360 Rio de Janeiro, RJ, Brazil.
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Krishnamurthy K. Complete Reduction to Amplitude Frequency Table (CRAFT)-A perspective. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:757-791. [PMID: 33486830 DOI: 10.1002/mrc.5135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 06/12/2023]
Abstract
The CRAFT (Complete Reduction to Amplitude Frequency Table) technique, based on Bayesian analysis approach, converts FID and/or interferogram (time domain) to a frequency-amplitude table (tabular domain) in a robust, automated, and time-efficient fashion. This mini review/perspective presents an introduction to CRAFT as a processing workflow followed by a discussion of several practical 1D and 2D examples of its applicability and associated benefit. CRAFT provides high quality quantitative results for complex systems without any need for conventional preprocessing steps, such as phase and baseline corrections. Two-dimensional time domain data are typically truncated, particularly in the evolution dimension, and conventional processing after zero-filling and t1max -matched apodization masks potentially available peak resolution. The line broadening introduced by extensive zero-filling and severe apodization functions leads to the lack of clear resolution of cross peaks. CRAFT decimation of interferograms, on the other hand, requires minimal or no apodization prior to extraction of the NMR parameters and significantly improves the spectral linewidth of the cross peaks along F1 dimension compared to conventional (FT) processing. The tabular representation of the CRAFT2d cross peaks information can be visualized in a variety of frequency domain formats for conventional spectral interpretation as well as quantitative applications. A simple workflow to generate in silico oversampled interferogram (iSOS) is presented, and its potential benefit in CRAFT decimation of highly crowded 2D NMR is demonstrated. This report is meant as a collective thesis to present a potentially new paradigm in data processing that questions the need for hitherto unchallenged preprocessing steps, such as phase and baseline correction in 1D and zero-fill/severe apodization in 2D.
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Elbagary RI, Fouad MA, Ezzeldin MI. Quantitative Nuclear Magnetic Resonance Spectroscopic Analysis of Two Commonly Used Gastrointestinal Tract Drugs. J AOAC Int 2021; 103:1208-1214. [PMID: 33241386 DOI: 10.1093/jaoacint/qsaa036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/10/2020] [Accepted: 02/28/2020] [Indexed: 11/13/2022]
Abstract
Two fast and precise quantitative nuclear magnetic resonance spectroscopic methods (qNMR) were established and evaluated for the determination of ondansetron (OND) and omeprazole (OMP) in bulk drugs and their pharmaceutical dosage forms. NMR spectra were established using dimethylsulfoxide (DMSO-d6) as a solvent and phloroglucinol as the internal standard. Proton NMR signals at 3.743, 3.811, and 5.670 ppm were used for quantitative monitoring purposes corresponding to OND, OMP, and phloroglucinol, respectively. In this study, the methods linearity, accuracy, limit of quantification, limit of detection, stability, and precision were validated as per International Conference on Harmonization (ICH) guidelines. Linearity ranges were 0.3-10 mg for OND and 1-10 mg for OMP. The student t-test and F-test were used for statistical evaluation. Herein, the proposed methods are useful and can be a successful practical appliance for OND and OMP determination in drug substances and their dosage forms.
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Affiliation(s)
- Ramzia I Elbagary
- Future University in Egypt, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Department of Pharmaceutical Chemistry, Cairo 11835, Egypt
| | - Marwa A Fouad
- Faculty of Pharmacy, Cairo University, Department of Pharmaceutical Chemistry, Giza 12613, Egypt
| | - Menna I Ezzeldin
- Future University in Egypt, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Department of Pharmaceutical Chemistry, Cairo 11835, Egypt
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Dos Santos Ribeiro HS, Dagnino D, Schripsema J. Rapid and accurate verification of drug identity, purity and quality by 1H-NMR using similarity calculations and differential NMR. J Pharm Biomed Anal 2021; 199:114040. [PMID: 33836463 DOI: 10.1016/j.jpba.2021.114040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/24/2021] [Accepted: 03/23/2021] [Indexed: 12/24/2022]
Abstract
The illegal trade in counterfeit and fake drugs is a worldwide multi-billion dollar industry, not only generating enormous economic losses, but health problems for the general population, through direct toxicity, treatment failure and the increased generation of antibiotic resistance. Techniques for high-throughput testing of suspect medicines are needed to face the challenges of the problem. In this study we show that with nuclear magnetic resonance spectroscopy (NMR) drug compliance can be verified in a few minutes, providing data on drug identity, purity and quality without the necessity to develop a specific methodology and using a direct extraction with deuterated solvent. The evaluation of the data is facilitated by similarity calculations and differential NMR spectroscopy. The viability and limitations of this method were assessed, with the application on five different drugs, namely sertraline hydrochloride, alprazolam, vitamin D3, enalapril maleate and paracetamol, in which the individual dosage quantity of the active ingredient ranged from 750 mg down to 0.25 mg. The appropriate sample weight, solvent and internal standard were determined for each drug and quantification was carried out by choosing the most adequate NMR signals for each compound and the internal standard. With the method the accuracy of the quantification is somewhat sacrificed for increased speed in the analysis, but the measurements offer excellent precision and offer the possibility of external calibration. Spectral similarity calculations and differential NMR spectroscopy were used to compare different generic brands and detect eventual undeclared constituents and contaminants. In one brand of alprazolam tablets the undeclared constituent tristearin was found, while in paracetamol tablets the contaminant para-aminophenol was found at a level above the allowed by the legislation. The applicability and limitations of the method are discussed.
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Affiliation(s)
- Helen Sant'Ana Dos Santos Ribeiro
- Grupo Metabolômica, Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, Campos dos Goytacazes, 28013-602, Brazil
| | - Denise Dagnino
- Grupo Metabolômica, Laboratório de Biotecnologia, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, Campos dos Goytacazes, 28013-602, Brazil.
| | - Jan Schripsema
- Grupo Metabolômica, Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, Campos dos Goytacazes, 28013-602, Brazil.
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8
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Quantum study of DHA, DPA and EPA anticancer fatty acids for microscopic explanation of their biological functions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Siudem P, Bukowicki J, Wawer I, Paradowska K. Structural studies of two capsaicinoids: dihydrocapsaicin and nonivamide. 13C and 15N MAS NMR supported by genetic algorithm and GIAO DFT calculations. RSC Adv 2020; 10:18082-18092. [PMID: 35517189 PMCID: PMC9053636 DOI: 10.1039/d0ra01320j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/29/2020] [Indexed: 11/21/2022] Open
Abstract
Capsaicinoids are alkaloid type capsaicin analogs with prospective pharmacological activity. However their solid state conformations have not been studied yet. As part of the study, cross polarization (CP) magic angle spinning (MAS) solid state 13C and 15N NMR spectra of dihydrocapsaicin (DHCAP) and nonivamide (NVA) were recorded. Solid state chemical shifts differ from their solution counterparts; remarkable differences occur for carbons C2′, C6′ and C7′ linked to C1′ in DHCAP and with methylene carbons C4–C8 in NVA. The doubling of some resonances in the spectra of solid NVA indicates that there are two molecules in the crystallographic asymmetric unit. DFT GIAO calculations of shielding constants were performed for several geometric isomers, including molecules with different orientations of aliphatic chain with respect to aromatic ring. Low-energy conformers were found by genetic algorithm methodology. Comparison of experimental 13C chemical shifts with theoretical (GIAO DFT) shielding parameters was helpful in predicting the most reliable geometry in the solid state. Cross polarization time constants TCP and relaxation times in the rotating frame TH1ρ were obtained from variable-contact cross-polarization experiments. TH1ρ are longer in the order: NVA < CAP < DHCAP. The conformations of dihydrocapsaicin and nonivamide were studied by ssNMR spectroscopy supported by theoretical DFT/GIAO and genetic algorithm calculations.![]()
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Affiliation(s)
- Paweł Siudem
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw Banacha 1 PL-02097 Warsaw Poland +48 22 5720 950 +48 22 5720 950
| | - Jarosław Bukowicki
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw Banacha 1 PL-02097 Warsaw Poland +48 22 5720 950 +48 22 5720 950
| | - Iwona Wawer
- The State Higher Vocational School Rynek 1 PL-38400 Krosno Poland
| | - Katarzyna Paradowska
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw Banacha 1 PL-02097 Warsaw Poland +48 22 5720 950 +48 22 5720 950
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Shurshalova GS, Yulmetov AR, Sharapova DA, Aganov AV, Klochkov VV. Interaction of Lovastatin with Model Membranes by NMR Data and from MD Simulations. BIONANOSCIENCE 2020. [DOI: 10.1007/s12668-020-00722-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Diehl B, Holzgrabe U, Monakhova Y, Schönberger T. Quo Vadis qNMR? J Pharm Biomed Anal 2019; 177:112847. [PMID: 31505431 DOI: 10.1016/j.jpba.2019.112847] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/27/2019] [Accepted: 08/28/2019] [Indexed: 01/11/2023]
Abstract
The quantification of a drug, its impurities, and e.g. components of a mixture has become routine in NMR laboratories and many applications have been described in the literature. However, besides simply using 1D 1H or 13C NMR, a number of more advanced methods has been developed and used in the past. Here, we want to describe the applicability of nuclei beyond the classical ones 1H and 13C. Mixtures can be characterized much better by applying various chemometric methods and separating the signals of mixture components can be achieved by DOSY experiments. All these methods contribute to the platform of qNMR methods and extend the possibilities of NMR for quantification and quality evaluation of drugs, excipients, polymers, and plant extracts. However, for quantification purposes, validation is always an issue and it is necessary to think about taking NMR related measures which might be different from the ones considered for chromatographic methods.
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Affiliation(s)
- Bernd Diehl
- Spectral Service AG, Emil-Hoffmann-Str. 33, 50996, Cologne, Germany
| | - Ulrike Holzgrabe
- Institute of Pharmacy, University of Wuerzburg, Am Hubland, 97074, Wuerzburg, Germany.
| | - Yulia Monakhova
- Spectral Service AG, Emil-Hoffmann-Str. 33, 50996, Cologne, Germany; Institute of Chemistry, Saratov State University, Astrakhanskaya Street 83, 410012, Saratov, Russia; Institute of Chemistry, Saint Petersburg State University, 13B Universitetskaya Emb., St Petersburg, 199034, Russia
| | - Torsten Schönberger
- Bundeskriminalamt, Forensic Science Institute, KT43 - Central Analytics II, 65173 Wiesbaden, Germany
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12
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Galiullina L, Musabirova G, Latfullin I, Aganov A, Klochkov V. Spatial structure of atorvastatin and its complex with model membrane in solution studied by NMR and theoretical calculations. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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13
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Kapoor B, Gupta R, Singh SK, Gulati M, Singh S. Prodrugs, phospholipids and vesicular delivery - An effective triumvirate of pharmacosomes. Adv Colloid Interface Sci 2018; 253:35-65. [PMID: 29454464 DOI: 10.1016/j.cis.2018.01.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 12/11/2022]
Abstract
With the advent from the laboratory bench to patient bedside in last five decades, vesicular systems have now come to be widely accepted as pragmatic means for controlled delivery of drugs. Their success stories include those of liposomes, niosomes and even the lately developed ethosomes and transferosomes. Pharmacosomes, which, as delivery systems offer numerous advantages and have been widely researched, however, remain largely unacknowledged as a successful delivery system. Though a large number of drugs have been derivatized and formulated into self-assembled vesicular systems, the term pharmacosomes has not been widely used while reporting them. Therefore, their relative obscurity may be attributed to the non-usage of the nomenclature of pharmacosomes by the researchers working in the area. We present a review on the scenario that lead to origin of these bio-inspired vesicles composed of self-assembling amphiphilic molecules. Various drugs that have been formulated into pharmacosomes, their characterization techniques, their properties relative to those of other vesicular delivery systems, and the success achieved so far are also discussed.
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14
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Hill DA, Leahy AB, Sciasci J, O’Neill SP, Reilly A, Balamuth N, Seeholzer SH, Spergel JM, Brown-Whitehorn TF. Medication contaminants as a potential cause of anaphylaxis to vincristine. Pediatr Blood Cancer 2018; 65:10.1002/pbc.26761. [PMID: 28834048 PMCID: PMC5978699 DOI: 10.1002/pbc.26761] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 07/20/2017] [Indexed: 11/10/2022]
Abstract
Vincristine (VCR) is a vinca alkaloid and common chemotherapeutic that is used to treat multiple pediatric and adult malignancies. Despite its common use, cases of anaphylaxis to VCR are rare and typically isolated to a single individual. We report a series of eight patients with adverse reactions to VCR over the course of 11 months at a single institution, four of which progressed to anaphylaxis and one of which resulted in cardiac arrest. Mass spectrometry analysis of medication lots was performed to test for possible contaminant(s). Our findings highlight the risk of anaphylaxis during therapy with VCR.
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Affiliation(s)
- David A. Hill
- Division of Allergy and Immunology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA,
USA,Institute for Immunology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Allison Barz Leahy
- Division of Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Joseph Sciasci
- Department of Pharmacy, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Sean P. O’Neill
- Office of Safety and Medical Operations, Perelman School of Medicine at the University of Pennsylvania, Philadelphia,
PA, USA
| | - Anne Reilly
- Division of Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Naomi Balamuth
- Division of Oncology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Steven H. Seeholzer
- Department of Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Perelman School of
Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Jonathan M. Spergel
- Division of Allergy and Immunology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA,
USA,Institute for Immunology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Terri F. Brown-Whitehorn
- Division of Allergy and Immunology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA,
USA
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16
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Tan Z, Reyes-Suarez E, Indrasena W, Kralovec JA. Novel approach to study fish oil oxidation using 1H nuclear magnetic resonance spectroscopy. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.06.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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17
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Casanova E, Knowles TDJ, Williams C, Crump MP, Evershed RP. Use of a 700 MHz NMR Microcryoprobe for the Identification and Quantification of Exogenous Carbon in Compounds Purified by Preparative Capillary Gas Chromatography for Radiocarbon Determinations. Anal Chem 2017; 89:7090-7098. [DOI: 10.1021/acs.analchem.7b00987] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Emmanuelle Casanova
- Organic
Geochemistry Unit, School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Timothy D. J. Knowles
- Bristol
Radiocarbon Accelerator Mass Spectrometer, University of Bristol, 43 Woodland Road, Bristol BS8 1UU, U.K
| | - Christopher Williams
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
- BrisSynBio, University of Bristol, Life Sciences Building, Tyndall
Avenue, Bristol BS8 1TQ, U.K
| | - Matthew P. Crump
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
- BrisSynBio, University of Bristol, Life Sciences Building, Tyndall
Avenue, Bristol BS8 1TQ, U.K
| | - Richard P. Evershed
- Organic
Geochemistry Unit, School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
- Bristol
Radiocarbon Accelerator Mass Spectrometer, University of Bristol, 43 Woodland Road, Bristol BS8 1UU, U.K
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Nuclear Magnetic Resonance and Headspace Solid-Phase Microextraction Gas Chromatography as Complementary Methods for the Analysis of Beer Samples. BEVERAGES 2017. [DOI: 10.3390/beverages3020021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Interaction of different statins with model membranes by NMR data. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:295-300. [DOI: 10.1016/j.bbamem.2016.12.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 11/14/2016] [Accepted: 12/14/2016] [Indexed: 02/07/2023]
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20
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Fernández-Ginés FD, García-Muñoz S, Mateo-Carrasco H, Rincón-Cervera M&A, Cortiñas-Sáenz M, Morales-Molina JA, Fernández-Sánchez C, Expósito-López JM, Rodríguez-García I. Innovate combination of sevoflurane dilution in dimethyl sulfoxide: A stability study by gas chromatography and nuclear magnetic resonance. World J Pharmacol 2016; 5:59-67. [DOI: 10.5497/wjp.v5.i3.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 07/26/2016] [Accepted: 08/31/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate physicochemical stability of sevoflurane in dimethyl sulfoxide using gas chromatography with a flame ionization detector and nuclear magnetic resonance (NMR).
METHODS Undiluted sevoflurane, plus dilutions 1:2, 1:5, 1:10, 1:25, and 1:50 in dimethyl sulfoxide were prepared in a vertical laminar flow cabinet class II type B and stored at different temperatures (23 °C, 6 °C, and -10 °C) for 45 d. Sterile 1 mL polypropylene amber syringes to minimize light degradation, caps and needles were used. The presence of sevoflurane and its degradation products in the samples was determined by gas chromatography with flame ionization detector (260 °C, 40 min), and by 1H, 19F, and proton-decoupled 19F nuclear magnetic resonance.
RESULTS The gas chromatography analysis showed sevoflurane and dimethyl sulfoxide (DMSO) retention times were 2.7 and 13.0 min, respectively. Pure DMSO injection into the column resulted in two additional peaks at 2.1 and 2.8 min. The same sevoflurane peak at 2.7 min was observed in all the dilutions at -10 °C, 4 °C and 25 °C. The NMR spectra showed signals consistent with the sevoflurane structure in all the dilutions at -10 °C, 4 °C and 25 °C. In the 1H spectrum, two signals corresponding to the sevoflurane molecule were observed at 5.12 and 4.16 parts per million (ppm). In the 19F-NMR spectrum, two signals were observed at chemical shift -76.77 ppm and chemical shift -157.13 ppm. In the 19F{1H}-NMR CPD, two signals were observed at chemical shift -76.77 ppm and chemical shift -157.13 ppm. The first one showed a doublet (JF-F = 3.1 Hz) which integrated by six fluorine nuclei from the hexafluoro-isopropyl group. The second signal was integrated by a fluorine atom and showed a septuplet (JF-F = 3.1 Hz).
CONCLUSION This study shows that different concentrations of sevoflurane in dimethyl sulfoxide retain their chemical composition after exposure to different temperatures for a period of 45 d.
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Druzhyna N, Szczesny B, Olah G, Módis K, Asimakopoulou A, Pavlidou A, Szoleczky P, Gerö D, Yanagi K, Törö G, López-García I, Myrianthopoulos V, Mikros E, Zatarain JR, Chao C, Papapetropoulos A, Hellmich MR, Szabo C. Screening of a composite library of clinically used drugs and well-characterized pharmacological compounds for cystathionine β-synthase inhibition identifies benserazide as a drug potentially suitable for repurposing for the experimental therapy of colon cancer. Pharmacol Res 2016; 113:18-37. [PMID: 27521834 PMCID: PMC5107130 DOI: 10.1016/j.phrs.2016.08.016] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 08/08/2016] [Accepted: 08/09/2016] [Indexed: 01/23/2023]
Abstract
Cystathionine-β-synthase (CBS) has been recently identified as a drug target for several forms of cancer. Currently no potent and selective CBS inhibitors are available. Using a composite collection of 8871 clinically used drugs and well-annotated pharmacological compounds (including the LOPAC library, the FDA Approved Drug Library, the NIH Clinical Collection, the New Prestwick Chemical Library, the US Drug Collection, the International Drug Collection, the ‘Killer Plates’ collection and a small custom collection of PLP-dependent enzyme inhibitors), we conducted an in vitro screen in order to identify inhibitors for CBS using a primary 7-azido-4-methylcoumarin (AzMc) screen to detect CBS-derived hydrogen sulfide (H2S) production. Initial hits were subjected to counterscreens using the methylene blue assay (a secondary assay to measure H2S production) and were assessed for their ability to quench the H2S signal produced by the H2S donor compound GYY4137. Four compounds, hexachlorophene, tannic acid, aurintricarboxylic acid and benserazide showed concentration-dependent CBS inhibitory actions without scavenging H2S released from GYY4137, identifying them as direct CBS inhibitors. Hexachlorophene (IC50: ∼60 μM), tannic acid (IC50: ∼40 μM) and benserazide (IC50: ∼30 μM) were less potent CBS inhibitors than the two reference compounds AOAA (IC50: ∼3 μM) and NSC67078 (IC50: ∼1 μM), while aurintricarboxylic acid (IC50: ∼3 μM) was equipotent with AOAA. The second reference compound NSC67078 not only inhibited the CBS-induced AzMC fluorescence signal (IC50: ∼1 μM), but also inhibited with the GYY4137-induced AzMC fluorescence signal with (IC50 of ∼6 μM) indicative of scavenging/non-specific effects. Hexachlorophene (IC50: ∼6 μM), tannic acid (IC50: ∼20 μM), benserazide (IC50: ∼20 μM), and NSC67078 (IC50: ∼0.3 μM) inhibited HCT116 colon cancer cells proliferation with greater potency than AOAA (IC50: ∼300 μM). In contrast, although a CBS inhibitor in the cell-free assay, aurintricarboxylic acid failed to inhibit HCT116 proliferation at lower concentrations, and stimulated cell proliferation at 300 μM. Copper-containing compounds present in the libraries, were also found to be potent inhibitors of recombinant CBS; however this activity was due to the CBS inhibitory effect of copper ions themselves. However, copper ions, up to 300 μM, did not inhibit HCT116 cell proliferation. Benserazide was only a weak inhibitor of the activity of the other H2S-generating enzymes CSE and 3-MST activity (16% and 35% inhibition at 100 μM, respectively) in vitro. Benserazide suppressed HCT116 mitochondrial function and inhibited proliferation of the high CBS-expressing colon cancer cell line HT29, but not the low CBS-expressing line, LoVo. The major benserazide metabolite 2,3,4-trihydroxybenzylhydrazine also inhibited CBS activity and suppressed HCT116 cell proliferation in vitro. In an in vivo study of nude mice bearing human colon cancer cell xenografts, benserazide (50 mg/kg/day s.q.) prevented tumor growth. In silico docking simulations showed that benserazide binds in the active site of the enzyme and reacts with the PLP cofactor by forming reversible but kinetically stable Schiff base-like adducts with the formyl moiety of pyridoxal. We conclude that benserazide inhibits CBS activity and suppresses colon cancer cell proliferation and bioenergetics in vitro, and tumor growth in vivo. Further pharmacokinetic, pharmacodynamic and preclinical animal studies are necessary to evaluate the potential of repurposing benserazide for the treatment of colorectal cancers.
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Affiliation(s)
- Nadiya Druzhyna
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Bartosz Szczesny
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Gabor Olah
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Katalin Módis
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA; Department of Surgery, The University of Texas Medical Branch, Galveston, TX, USA
| | - Antonia Asimakopoulou
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Patras, Greece; Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation of the Academy of Athens, Greece
| | - Athanasia Pavlidou
- National and Kapodistrian University of Athens, School of Pharmacy, Athens, Greece
| | - Petra Szoleczky
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Domokos Gerö
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Kazunori Yanagi
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Gabor Törö
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Isabel López-García
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | | | - Emmanuel Mikros
- National and Kapodistrian University of Athens, School of Pharmacy, Athens, Greece
| | - John R Zatarain
- Department of Surgery, The University of Texas Medical Branch, Galveston, TX, USA
| | - Celia Chao
- Department of Surgery, The University of Texas Medical Branch, Galveston, TX, USA
| | - Andreas Papapetropoulos
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation of the Academy of Athens, Greece; National and Kapodistrian University of Athens, School of Pharmacy, Athens, Greece
| | - Mark R Hellmich
- Department of Surgery, The University of Texas Medical Branch, Galveston, TX, USA; CBS Therapeutics Inc., Galveston, TX, USA
| | - Csaba Szabo
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA; CBS Therapeutics Inc., Galveston, TX, USA.
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Singh S, Roy R. The application of absolute quantitative (1)H NMR spectroscopy in drug discovery and development. Expert Opin Drug Discov 2016; 11:695-706. [PMID: 27187052 DOI: 10.1080/17460441.2016.1189899] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
INTRODUCTION The identification of a drug candidate and its structural determination is the most important step in the process of the drug discovery and for this, nuclear magnetic resonance (NMR) is one of the most selective analytical techniques. AREA COVERED The present review illustrates the various perspectives of absolute quantitative (1)H NMR spectroscopy in drug discovery and development. It deals with the fundamentals of quantitative NMR (qNMR), the physiochemical properties affecting qNMR, and the latest referencing techniques used for quantification. The precise application of qNMR during various stages of drug discovery and development, namely natural product research, drug quantitation in dosage forms, drug metabolism studies, impurity profiling and solubility measurements is elaborated. To achieve this, the authors explore the literature of NMR in drug discovery and development between 1963 and 2015. It also takes into account several other reviews on the subject. EXPERT OPINION qNMR experiments are used for drug discovery and development processes as it is a non-destructive, versatile and robust technique with high intra and interpersonal variability. However, there are several limitations also. qNMR of complex biological samples is incorporated with peak overlap and a low limit of quantification and this can be overcome by using hyphenated chromatographic techniques in addition to NMR.
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Affiliation(s)
- Suruchi Singh
- a Centre of Biomedical Research, Formerly Centre of Biomedical Magnetic Resonance , Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Lucknow , India
| | - Raja Roy
- a Centre of Biomedical Research, Formerly Centre of Biomedical Magnetic Resonance , Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Lucknow , India
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ElAmrawy F, ElAgouri G, Elnoweam O, Aboelazayem S, Farouk E, Nounou MI. Adulterated and Counterfeit Male Enhancement Nutraceuticals and Dietary Supplements Pose a Real Threat to the Management of Erectile Dysfunction: A Global Perspective. J Diet Suppl 2016; 13:660-93. [DOI: 10.3109/19390211.2016.1144231] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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24
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A simple and accurate protocol for absolute polar metabolite quantification in cell cultures using quantitative nuclear magnetic resonance. Anal Biochem 2016; 501:26-34. [PMID: 26898303 DOI: 10.1016/j.ab.2016.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 02/08/2016] [Accepted: 02/09/2016] [Indexed: 02/02/2023]
Abstract
Absolute analyte quantification by nuclear magnetic resonance (NMR) spectroscopy is rarely pursued in metabolomics, even though this would allow researchers to compare results obtained using different techniques. Here we report on a new protocol that permits, after pH-controlled serum protein removal, the sensitive quantification (limit of detection [LOD] = 5-25 μM) of hydrophilic nutrients and metabolites in the extracellular medium of cells in cultures. The method does not require the use of databases and uses PULCON (pulse length-based concentration determination) quantitative NMR to obtain results that are significantly more accurate and reproducible than those obtained by CPMG (Carr-Purcell-Meiboom-Gill) sequence or post-processing filtering approaches. Three practical applications of the method highlight its flexibility under different cell culture conditions. We identified and quantified (i) metabolic differences between genetically engineered human cell lines, (ii) alterations in cellular metabolism induced by differentiation of mouse myoblasts into myotubes, and (iii) metabolic changes caused by activation of neurotransmitter receptors in mouse myoblasts. Thus, the new protocol offers an easily implementable, efficient, and versatile tool for the investigation of cellular metabolism and signal transduction.
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25
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Structural studies of pravastatin and simvastatin and their complexes with SDS micelles by NMR spectroscopy. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Katz I, Blank A. Dynamic nuclear polarization in solid samples by electrical-discharge-induced radicals. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2015; 261:95-100. [PMID: 26547016 DOI: 10.1016/j.jmr.2015.10.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 10/15/2015] [Accepted: 10/16/2015] [Indexed: 05/14/2023]
Abstract
Dynamic nuclear polarization (DNP) is a method for enhancing nuclear magnetic resonance (NMR) signals that has many potential applications in chemistry and medicine. Traditionally, DNP signal enhancement is achieved through the use of exogenous radicals mixed in a solution with the molecules of interest. Here we show that proton DNP signal enhancements can be obtained for solid samples without the use of solvent and exogenous radicals. Radicals are generated primarily on the surface of a solid sample using electrical discharges. These radicals are found suitable for DNP. They are stable under moderate vacuum conditions, yet readily annihilate upon compound dissolution or air exposure. This feature makes them attractive for use in medical applications, where the current variety of radicals used for DNP faces regulatory problems. In addition, this solvent-free method may be found useful for analytical NMR of solid samples which cannot tolerate solvents, such as certain pharmaceutical products.
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Affiliation(s)
- Itai Katz
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Aharon Blank
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel.
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27
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Galiullina LF, Rakhmatullin IZ, Klochkova EA, Aganov AV, Klochkov VV. Structure of pravastatin and its complex with sodium dodecyl sulfate micelles studied by NMR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:110-114. [PMID: 25264019 DOI: 10.1002/mrc.4146] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 08/13/2014] [Accepted: 08/20/2014] [Indexed: 06/03/2023]
Abstract
The aim of this work was to study the mechanisms of interaction between pravastatin and cell membranes using model membranes (sodium dodecyl sulfate micelles) by nuclear magnetic resonance spectroscopy methods. On the basis of the nuclear magnetic resonance experiments, it was established that pravastatin can form intermolecular complexes with sodium dodecyl sulfate micelles by the interaction of its hydrophilic groups with the polar surface of the micelle. Conformational features of pravastatin molecule were also studied.
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Affiliation(s)
- L F Galiullina
- Institute of Physics, Kazan Federal University, 420008, Kazan, Russia
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28
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D’Hondt M, Bracke N, Taevernier L, Gevaert B, Verbeke F, Wynendaele E, De Spiegeleer B. Related impurities in peptide medicines. J Pharm Biomed Anal 2014; 101:2-30. [DOI: 10.1016/j.jpba.2014.06.012] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 06/05/2014] [Accepted: 06/08/2014] [Indexed: 12/16/2022]
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29
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Xu L, Shi X, Hu K. Quantification of multiple compounds containing heterogeneous elements in the mixture by one-dimensional nuclear magnetic resonance spectroscopy of different nuclei using a single universal concentration reference. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:779-782. [PMID: 25298349 DOI: 10.1002/mrc.4157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 08/12/2014] [Accepted: 09/09/2014] [Indexed: 06/04/2023]
Abstract
One-dimensional (1D) quantitative NMR (qNMR) is a useful tool for concentration determination due to its experimental simplicity and the direct proportionality of the integrated signal area to the number of nuclei spin. For complex mixtures, however, signal overlapping often in one-dimensional quantitative (1) H NMR (1D (1) H qNMR) spectrum limits the accurate quantification of individual compound. Here, we introduced employing joint 1D qNMR methods of different nuclei, such as (1) H and (31) P (or/and (19) F), to quantify multiple compounds in a complex mixture using a single universal concentration reference. When the concentration ratio of several compounds containing different elements in a complex mixture is of interest, the result calculated from measured intensities from 1D qNMR of different nuclei is independent of the gravimetric error from the reference. In this case, the common reference also serves as a 'quantitative bridge' among these 1D qNMR of different nuclei. Quantitative analysis of choline, phosphocholine, and glycerophosphocholine mixture is given as an example using trimethylphosphine oxide ((CH(3))(3) P(O)) as concentration reference. Compounds containing multiple elements, such as tetramethylammonium hexafluorophosphate (N(+) (CH(3))(4 PF6 (-) are proposed as the common concentration reference for (1) H, (13) C, (15) N, (31) P, and (19) F qNMR for the quantitative analysis of complex mixture containing these different elements. We anticipate that the proposed joint 1D qNMR approach using a universal concentration reference will be a valuable alternative for simultaneous quantification of multiple compounds in a complex mixture due to its accuracy and single and simple sample preparation.
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Affiliation(s)
- Li Xu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, 650201, China
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Weber M, Hellriegel C, Rueck A, Wuethrich J, Jenks P, Obkircher M. Method development in quantitative NMR towards metrologically traceable organic certified reference materials used as (31)P qNMR standards. Anal Bioanal Chem 2014; 407:3115-23. [PMID: 25416230 PMCID: PMC4383826 DOI: 10.1007/s00216-014-8306-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 10/22/2014] [Accepted: 10/28/2014] [Indexed: 11/30/2022]
Abstract
Quantitative nuclear magnetic resonance (qNMR) spectroscopy is employed by an increasing number of analytical and industrial laboratories for the assignment of content and quantitative determination of impurities. Within the last few years, it was demonstrated that (1)H qNMR can be performed with high accuracy leading to measurement uncertainties below 1 % relative. It was even demonstrated that the combination of (1)H qNMR with metrological weighing can lead to measurement uncertainties below 0.1 % when highly pure substances are used. Although qNMR reference standards are already available as certified reference materials (CRM) providing traceability on the basis of (1)H qNMR experiments, there is an increasing demand for purity assays on phosphorylated organic compounds and metabolites requiring CRM for quantification by (31)P qNMR. Unfortunately, the number of available primary phosphorus standards is limited to a few inorganic CRM which only can be used for the analysis of water-soluble analytes but fail when organic solvents must be employed. This paper presents the concept of value assignment by (31)P qNMR measurements for the development of CRM and describes different approaches to establish traceability to primary Standard Reference Material from the National Institute of Standards and Technology (NIST SRM). Phosphonoacetic acid is analyzed as a water-soluble CRM candidate, whereas triphenyl phosphate is a good candidate for the use as qNMR reference material in organic solvents. These substances contain both nuclei, (1)H and (31)P, and the concept is to show that it is possible to indirectly quantify a potential phosphorus standard via its protons using (1)H qNMR. The same standard with its assigned purity can then be used for the quantification of an analyte via its phosphorus using (31)P qNMR. For the validation of the concept, triphenyl phosphate and phosphonoacetic acid have been used as (31)P qNMR standards to determine the purity of the analyte tris(2-chloroethyl) phosphate, and the resulting purity values perfectly overlap within their expanded measurement uncertainties.
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Affiliation(s)
- Michael Weber
- Sigma-Aldrich Switzerland, Industriestrasse 25, 9471, Buchs, Switzerland
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31
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A statistical-textural-features based approach for classification of solid drugs using surface microscopic images. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2014; 2014:791246. [PMID: 25371702 PMCID: PMC4211252 DOI: 10.1155/2014/791246] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 09/15/2014] [Accepted: 09/15/2014] [Indexed: 11/18/2022]
Abstract
The quality of pharmaceutical products plays an important role in pharmaceutical industry as well as in our lives. Usage of defective tablets can be harmful for patients. In this research we proposed a nondestructive method to identify defective and nondefective tablets using their surface morphology. Three different environmental factors temperature, humidity and moisture are analyzed to evaluate the performance of the proposed method. Multiple textural features are extracted from the surface of the defective and nondefective tablets. These textural features are gray level cooccurrence matrix, run length matrix, histogram, autoregressive model and HAAR wavelet. Total textural features extracted from images are 281. We performed an analysis on all those 281, top 15, and top 2 features. Top 15 features are extracted using three different feature reduction techniques: chi-square, gain ratio and relief-F. In this research we have used three different classifiers: support vector machine, K-nearest neighbors and naïve Bayes to calculate the accuracies against proposed method using two experiments, that is, leave-one-out cross-validation technique and train test models. We tested each classifier against all selected features and then performed the comparison of their results. The experimental work resulted in that in most of the cases SVM performed better than the other two classifiers.
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Nyirimigabo E, Xu Y, Li Y, Wang Y, Agyemang K, Zhang Y. A review on phytochemistry, pharmacology and toxicology studies of Aconitum. J Pharm Pharmacol 2014; 67:1-19. [DOI: 10.1111/jphp.12310] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 07/18/2014] [Indexed: 12/22/2022]
Abstract
Abstract
Objectives
A number of species belonging to herbal genus Aconitum are well-known and popular for their medicinal benefits in Indian, Vietnamese, Korean, Japanese, Tibetan and Chinese systems of medicine. It is a valuable drug as well as an unpredictable toxic material. It is therefore imperative to understand and control the toxic potential of herbs from this genus. In this review, the ethnomedicinal, phytochemistry, pharmacology, structure activity relationship and toxicology studies of Aconitum were presented to add to knowledge for their safe application.
Key findings
A total of about 76 of all aconite species growing in China and surrounding far-east and Asian countries are used for various medical purposes. The main ingredients of aconite species are alkaloids, flavonoids, free fatty acids and polysaccharides. The tuberous roots of genus Aconitum are commonly applied for various diseases such as rheumatic fever, painful joints and some endocrinal disorders. It stimulates the tip of sensory nerve fibres. These tubers of Aconitum are used in the herbal medicines only after processing. There remain high toxicological risks of the improper medicinal applications of Aconitum. The cardio and neurotoxicities of this herb are potentially lethal. Many analytical methods have been reported for quantitatively and qualitatively characterization of Aconitum.
Summary
Aconitum is a plant of great importance both in traditional medicine in general and in TCM in particular. Much attention should be put on Aconitum because of its narrow therapeutic range. However, Aconitum's toxicity can be reduced using different techniques and then benefit from its pharmacological activities. New methods, approaches and techniques should be developed for chemical and toxicological analysis to improve its quality and safety.
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Affiliation(s)
- Eric Nyirimigabo
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Rwanda Standards Board, Kigali, Republic of Rwanda
| | - Yanyan Xu
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yubo Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yuming Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Kojo Agyemang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Noguchi Memorial Institute for Medical Research, Accra, Ghana
| | - Yanjun Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Traditional Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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33
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Horský J, Walterová Z. Fingerprint Multiplicity in MALDI-TOF Mass Spectrometry of Copolymers. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/masy.201300122] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiří Horský
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Zuzana Walterová
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
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34
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Schmidt C, Beck M, Ahrenberg M, Schick C, Keßler O, Kragl U. Room temperature ionic liquids in a heat treatment process for metals. RSC Adv 2014. [DOI: 10.1039/c4ra06901c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Hildebrand M, Hamaed H, Namespetra AM, Donohue JM, Fu R, Hung I, Gan Z, Schurko RW. 35Cl solid-state NMR of HCl salts of active pharmaceutical ingredients: structural prediction, spectral fingerprinting and polymorph recognition. CrystEngComm 2014. [DOI: 10.1039/c4ce00544a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A series of HCl salts of active pharmaceutical ingredients (APIs) have been characterized via35Cl solid-state NMR (SSNMR) spectroscopy and first-principles plane-wave DFT calculations of 35Cl NMR interaction tensors.
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Affiliation(s)
- Marcel Hildebrand
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor, Canada N9B 3P4
| | - Hiyam Hamaed
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor, Canada N9B 3P4
| | - Andrew M. Namespetra
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor, Canada N9B 3P4
| | - John M. Donohue
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor, Canada N9B 3P4
| | - Riqiang Fu
- National High Magnetic Field Laboratory
- Tallahassee, USA
| | - Ivan Hung
- National High Magnetic Field Laboratory
- Tallahassee, USA
| | - Zhehong Gan
- National High Magnetic Field Laboratory
- Tallahassee, USA
| | - Robert W. Schurko
- Department of Chemistry and Biochemistry
- University of Windsor
- Windsor, Canada N9B 3P4
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Krishnamurthy K. CRAFT (complete reduction to amplitude frequency table)--robust and time-efficient Bayesian approach for quantitative mixture analysis by NMR. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:821-829. [PMID: 24154986 DOI: 10.1002/mrc.4022] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/30/2013] [Accepted: 10/03/2013] [Indexed: 06/02/2023]
Abstract
The intrinsic quantitative nature of NMR is increasingly exploited in areas ranging from complex mixture analysis (as in metabolomics and reaction monitoring) to quality assurance/control. Complex NMR spectra are more common than not, and therefore, extraction of quantitative information generally involves significant prior knowledge and/or operator interaction to characterize resonances of interest. Moreover, in most NMR-based metabolomic experiments, the signals from metabolites are normally present as a mixture of overlapping resonances, making quantification difficult. Time-domain Bayesian approaches have been reported to be better than conventional frequency-domain analysis at identifying subtle changes in signal amplitude. We discuss an approach that exploits Bayesian analysis to achieve a complete reduction to amplitude frequency table (CRAFT) in an automated and time-efficient fashion - thus converting the time-domain FID to a frequency-amplitude table. CRAFT uses a two-step approach to FID analysis. First, the FID is digitally filtered and downsampled to several sub FIDs, and secondly, these sub FIDs are then modeled as sums of decaying sinusoids using the Bayesian approach. CRAFT tables can be used for further data mining of quantitative information using fingerprint chemical shifts of compounds of interest and/or statistical analysis of modulation of chemical quantity in a biological study (metabolomics) or process study (reaction monitoring) or quality assurance/control. The basic principles behind this approach as well as results to evaluate the effectiveness of this approach in mixture analysis are presented.
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Weber M, Hellriegel C, Rueck A, Wuethrich J, Jenks P. Using high-performance ¹H NMR (HP-qNMR®) for the certification of organic reference materials under accreditation guidelines--describing the overall process with focus on homogeneity and stability assessment. J Pharm Biomed Anal 2013; 93:102-10. [PMID: 24182847 DOI: 10.1016/j.jpba.2013.09.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 09/04/2013] [Accepted: 09/10/2013] [Indexed: 10/26/2022]
Abstract
Quantitative NMR spectroscopy (qNMR) is gaining interest across both analytical and industrial research applications and has become an essential tool for the content assignment and quantitative determination of impurities. The key benefits of using qNMR as measurement method for the purity determination of organic molecules are discussed, with emphasis on the ability to establish traceability to "The International System of Units" (SI). The work describes a routine certification procedure from the point of view of a commercial producer of certified reference materials (CRM) under ISO/IEC 17025 and ISO Guide 34 accreditation, that resulted in a set of essential references for (1)H qNMR measurements, and the relevant application data for these substances are given. The overall process includes specific selection criteria, pre-tests, experimental conditions, homogeneity and stability studies. The advantages of an accelerated stability study over the classical stability-test design are shown with respect to shelf-life determination and shipping conditions.
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Affiliation(s)
- Michael Weber
- Sigma-Aldrich Switzerland, Industriestrasse 25, CH-9471 Buchs, Switzerland
| | | | - Alexander Rueck
- Sigma-Aldrich Switzerland, Industriestrasse 25, CH-9471 Buchs, Switzerland.
| | - Juerg Wuethrich
- Sigma-Aldrich Switzerland, Industriestrasse 25, CH-9471 Buchs, Switzerland
| | - Peter Jenks
- Sigma-Aldrich Switzerland, Industriestrasse 25, CH-9471 Buchs, Switzerland
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Chakraborty A, Pan S, Chattaraj PK. Biological Activity and Toxicity: A Conceptual DFT Approach. STRUCTURE AND BONDING 2013. [DOI: 10.1007/978-3-642-32750-6_5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Barding GA, Béni S, Fukao T, Bailey-Serres J, Larive CK. Comparison of GC-MS and NMR for metabolite profiling of rice subjected to submergence stress. J Proteome Res 2012. [PMID: 23205590 DOI: 10.1021/pr300953k] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Natural disasters such as drought, extreme temperatures, and flooding can severely impact crop production. Understanding the metabolic response of crops threatened with these disasters provides insights into biological response mechanisms that can influence survival. In this study, a comparative analysis of GC-MS and (1)H NMR results was conducted for wild-type and tolerant rice varieties stressed by up to 3 days of submergence and allowed 1 day of postsubmergence recovery. Most metabolomics studies are conducted using a single analytical platform. Each platform, however, has inherent advantages and disadvantages that can influence the analytical coverage of the metabolome. In this work, a more thorough analysis of the plant stress response was possible through the use of both (1)H NMR and GC-MS. Several metabolites, such as S-methyl methionine and the dipeptide alanylglycine, were only detected and quantified by (1)H NMR. The high dynamic range of NMR, as compared with that of the GC-TOF-MS used in this study, provided broad coverage of the metabolome in a single experiment. The sensitivity of GC-MS facilitated the quantitation of sugars, organic acids, and amino acids, some of which were not detected by NMR, and provided additional insights into the regulation of the TCA cycle. The combined metabolic information provided by (1)H NMR and GC-MS was essential for understanding the complex biochemical and molecular response of rice plants to submergence.
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Affiliation(s)
- Gregory A Barding
- Department of Chemistry, University of California-Riverside, Riverside, California 92521, USA
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Szyrwiel L, Pap JS, Malinka W, Szewczuk Z, Kotynia A, Brasun J. Interactions of anti-Parkinson drug benserazide with Zn(II), Cu(II), Fe(II) ions. J Pharm Biomed Anal 2012; 76:36-43. [PMID: 23291441 DOI: 10.1016/j.jpba.2012.11.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 11/21/2012] [Accepted: 11/22/2012] [Indexed: 12/14/2022]
Abstract
One of the treatments of Parkinson disease is based on increasing the brain dopamine level by L-DOPA (LD) applications. To prevent the peripheral degradation of levodopa, another drug, benserazide is applied. On the other hand, during this neurodegenerative disease changes in the homeostasis of metals are observed and the increasing brain zinc levels are postulated to have therapeutic effects. Here we present studies on interactions of Zn(II), Cu(II), Fe(II) ions with benserazide and with benserazide/levodopa in ternary system. By applying mass spectrometry and UV-vis methods we describe the interactions between selected metal ions and the drug additives in the investigated systems. The results show forming of equimolar complexes in the binary and ternary systems.
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Affiliation(s)
- Lukasz Szyrwiel
- Department of Chemistry of Drugs, Wrocław Medical University, ul. Borowska 211, 50-552 Wrocław, Poland; CNRS/UPPA, LCABIE, UMR5254, Hélioparc, 2, av. Pr. Angot, F-64053 Pau, France.
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Mollaamin F, Monajjemi M. DFT outlook of solvent effect on function of nano bioorganic drugs. PHYSICS AND CHEMISTRY OF LIQUIDS 2012. [DOI: 10.1080/00319104.2011.646444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Quantitative NMR for bioanalysis and metabolomics. Anal Bioanal Chem 2012; 404:1165-79. [PMID: 22766756 DOI: 10.1007/s00216-012-6188-z] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 06/04/2012] [Accepted: 06/08/2012] [Indexed: 01/16/2023]
Abstract
Over the last several decades, significant technical and experimental advances have made quantitative nuclear magnetic resonance (qNMR) a valuable analytical tool for quantitative measurements on a wide variety of samples. In particular, qNMR has emerged as an important method for metabolomics studies where it is used for interrogation of large sets of biological samples and the resulting spectra are treated with multivariate statistical analysis methods. In this review, recent developments in instrumentation and pulse sequences will be discussed as well as the practical considerations necessary for acquisition of quantitative NMR experiments with an emphasis on their use for bioanalysis. Recent examples of the application of qNMR for metabolomics/metabonomics studies, the characterization of biologicals such as heparin, antibodies, and vaccines, and the analysis of botanical natural products will be presented and the future directions of qNMR discussed.
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Lachenmeier DW, Monakhova YB, Kuballa T, Löbell-Behrends S, Maixner S, Kohl-Himmelseher M, Waldner A, Steffen C. NMR evaluation of total statin content and HMG-CoA reductase inhibition in red yeast rice (Monascus spp.) food supplements. Chin Med 2012; 7:8. [PMID: 22439629 PMCID: PMC3337221 DOI: 10.1186/1749-8546-7-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 03/22/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Red yeast rice (i.e., rice fermented with Monascus spp.), as a food supplement, is claimed to be blood cholesterol-lowering. The red yeast rice constituent monacolin K, also known as lovastatin, is an inhibitor of the hydroxymethylglutaryl-CoA (HMG-CoA) reductase. This article aims to develop a sensitive nuclear magnetic resonance (NMR) method to determine the total statin content of red yeast rice products. METHODS The total statin content was determined by a 400 MHz 1H NMR spectroscopic method, based on the integration of the multiplet at δ 5.37-5.32 ppm of a hydrogen at the hexahydronaphthalene moiety in comparison to an external calibration with lovastatin. The activity of HMG-CoA reductase was measured by a commercial spectrophotometric assay kit. RESULTS The NMR detection limit for total statins was 6 mg/L (equivalent to 0.3 mg/capsule, if two capsules are dissolved in 50 mL ethanol). The relative standard deviations were consistently lower than 11%. The total statin concentrations of five red yeast rice supplements were between 1.5 and 25.2 mg per specified daily dose. A dose-dependent inhibition of the HMG-CoA reductase enzyme activity by the red yeast rice products was demonstrated. CONCLUSION A simple and direct NMR assay was developed to determine the total statin content in red yeast rice. The assay can be applied for the determination of statin content for the regulatory control of red yeast rice products.
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Affiliation(s)
- Dirk W Lachenmeier
- Chemisches und Veterinäruntersuchungsamt (CVUA) Karlsruhe, Weissenburger Strasse 3, 76187 Karlsruhe, Germany.
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Salem AA, Mossa HA. Method validation and determinations of levofloxacin, metronidazole and sulfamethoxazole in an aqueous pharmaceutical, urine and blood plasma samples using quantitative nuclear magnetic resonance spectrometry. Talanta 2011; 88:104-14. [PMID: 22265475 DOI: 10.1016/j.talanta.2011.10.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 10/08/2011] [Accepted: 10/13/2011] [Indexed: 10/16/2022]
Abstract
Selective, rapid and accurate quantitative proton nuclear magnetic resonance (qHNMR) method for the determination of levofloxacin, metronidazole benzoate and sulfamethoxazole in aqueous solutions was developed and validated. The method was successfully applied to the determinations of the drugs and their admixtures in pharmaceutical, urine and plasma samples. Maleic acid and sodium malate were used as internal standards. Effect of temperature on spectral measurements was evaluated. Linear dynamic ranges of 0.50-68.00, 0.13-11.30 and 0.24-21.00 mg per 0.60 mL solution were obtained for levofloxacin, metronidazole benzoate and sulfamethoxazole, respectively. Average recovery % in the range of 96.00-104.20 ± (0.17-2.91) was obtained for drugs in pure, pharmaceutical, plasma and urine samples. Inter and intra-day analyses gave average recoveries % in the ranges 96.10-98.40 ± (1.68-2.81) and 96.00-104.20 ± (0.17-2.91), respectively. Instrumental detection limits ≤0.03 mg per 0.6 mL were obtained for the three drugs. Developed method has demonstrated high performance characteristics for analyzing investigated drugs and their admixtures. Student t-test at 95% confidence level revealed insignificant bias between the real and measured contents of investigated drugs in pure, pharmaceutical, urine and plasma samples and its admixtures. Application of the statistical F-test revealed insignificant differences in precisions between the developed method and arbitrary selected reference methods.
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Affiliation(s)
- Alaa A Salem
- Department of Chemistry, Faculty of Science, United Arab Emirates University, Al-Ain, P.O. Box 17551, United Arab Emirates.
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Do NM, Olivier MA, Salisbury JJ, Wager CB. Application of Quantitative 19F and 1H NMR for Reaction Monitoring and In Situ Yield Determinations for an Early Stage Pharmaceutical Candidate. Anal Chem 2011; 83:8766-71. [DOI: 10.1021/ac202287y] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nga M. Do
- Chemical Research and Development, Pfizer Global Research and Development, Groton, Connecticut 06340, United States
| | - Mark A. Olivier
- Analytical Research and Development, Pfizer Global Research and Development, Groton, Connecticut 06340, United States
| | - John J. Salisbury
- Analytical Research and Development, Pfizer Global Research and Development, Groton, Connecticut 06340, United States
| | - Carrie B. Wager
- Chemical Research and Development, Pfizer Global Research and Development, Groton, Connecticut 06340, United States
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Kolokolova TN, Savel’ev OY, Sergeev NM. Metabolic analysis of human biological fluids by 1H NMR spectroscopy. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934808020020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kuminek G, Tagliari MP, Granada A, Bertol CD, Langassner SZ, Silva MAS, Stulzer HK. DEVELOPMENT AND VALIDATION OF A RAPID AND SIMPLE STABILITY-INDICATING LC METHOD FOR NIFEDIPINE. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826076.2010.518936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gislaine Kuminek
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Monika Piazzon Tagliari
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Andrea Granada
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Charise Dalazen Bertol
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Silvana Zucolotto Langassner
- b Laboratório de Química Farmacêutica, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina, Campus Universitário Trindade , Florianópolis, Brazil
| | - Marcos Antonio Segatto Silva
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
| | - Hellen Karine Stulzer
- a Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Federal de Santa Catarina , Florianópolis, Brazil
- c Laboratório de Controle de Qualidade, Departamento de Ciências Farmacêuticas , Universidade Estadual de Ponta Grossa , Ponta Grossa, Brazil
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Beni S, Limtiaco JFK, Larive CK. Analysis and characterization of heparin impurities. Anal Bioanal Chem 2010; 399:527-39. [PMID: 20814668 PMCID: PMC3015169 DOI: 10.1007/s00216-010-4121-x] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 08/09/2010] [Accepted: 08/10/2010] [Indexed: 12/16/2022]
Abstract
This review discusses recent developments in analytical methods available for the sensitive separation, detection and structural characterization of heparin contaminants. The adulteration of raw heparin with oversulfated chondroitin sulfate (OSCS) in 2007–2008 spawned a global crisis resulting in extensive revisions to the pharmacopeia monographs on heparin and prompting the FDA to recommend the development of additional physicochemical methods for the analysis of heparin purity. The analytical chemistry community quickly responded to this challenge, developing a wide variety of innovative approaches, several of which are reported in this special issue. This review provides an overview of methods of heparin isolation and digestion, discusses known heparin contaminants, including OSCS, and summarizes recent publications on heparin impurity analysis using sensors, near-IR, Raman, and NMR spectroscopy, as well as electrophoretic and chromatographic separations. Schematic illustrating the process for heparin impurity characterization ![]()
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Affiliation(s)
- Szabolcs Beni
- Department of Chemistry, University of California, Riverside, CA 92521, USA
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50
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Beyer T, Schollmayer C, Holzgrabe U. The role of solvents in the signal separation for quantitative 1H NMR spectroscopy. J Pharm Biomed Anal 2010; 52:51-8. [DOI: 10.1016/j.jpba.2009.12.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 11/06/2009] [Accepted: 12/03/2009] [Indexed: 10/20/2022]
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