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Wan Y, Li K, Li X, Li X, Chu H, Zhang Q. Purity Assessment of Tripropyl Phosphate through Mass Balance and 1H and 31P Quantitative Nuclear Magnetic Resonance. Molecules 2024; 29:1975. [PMID: 38731466 DOI: 10.3390/molecules29091975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 04/20/2024] [Accepted: 04/21/2024] [Indexed: 05/13/2024] Open
Abstract
Tripropyl phosphate (TnPP) is a commonly used organic phosphate flame retardant in the textiles, plastics, and coating industries. Residues are commonly detected in samples from the environment and food. The availability of certified reference materials (CRMs) is essential to ensure the accuracy and traceability of detection results. In this study, a comprehensive characterization of a CRM for TnPP was carried out, and its purity was evaluated using two distinct methodologies: mass balance (MB) and quantitative nuclear magnetic resonance spectroscopy (qNMR). In the MB method, the levels of structurally related organic impurities are 1.37 mg/g. The water content was determined to be 3.16 mg/g, while inorganic impurities were found to be 0.87 mg/g, and no residual organic solvents were detected. Benzoic acid and monocrotophos were chosen as internal standards for 1H-qNMR and 31P-qNMR, respectively. The purity of the TnPP CRM was assessed as 994.6 mg/g, 994.1 mg/g, and 993.5 mg/g using MB, 1H-qNMR, and 31P-qNMR techniques, respectively. The verified purity of the TnPP CRM was ultimately determined to be 994.1 mg/g, with an expanded uncertainty of 3.4 mg/g (k = 2), ensuring traceability to the International System of Units (SI). This CRM can be effectively utilized for preparing calibration solutions suitable for the routine monitoring of TnPP residues in plastics and food samples.
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Affiliation(s)
- Yuebing Wan
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
| | - Kangcong Li
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
| | - Xiuqin Li
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
- Key Laboratory of Chemical Metrology and Applications on Nutrition and Health for State Market Regulation, Beijing 100029, China
| | - Xiaomin Li
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
- Key Laboratory of Chemical Metrology and Applications on Nutrition and Health for State Market Regulation, Beijing 100029, China
| | - Hongtao Chu
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
| | - Qinghe Zhang
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
- Key Laboratory of Chemical Metrology and Applications on Nutrition and Health for State Market Regulation, Beijing 100029, China
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Li R, Chen JX, Lu Q, Geng TT, Xia PF, Wang Y, Chen LK, Shan ZL, Pan A, Liu G. Associations of lipoprotein subclasses with risk of all-cause and cardiovascular disease mortality in individuals with type 2 diabetes: A prospective cohort study. Diabetes Obes Metab 2023; 25:3259-3267. [PMID: 37492984 DOI: 10.1111/dom.15224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/29/2023] [Accepted: 07/10/2023] [Indexed: 07/27/2023]
Abstract
AIM Although lipoproteins are well-established risk factors for cardiovascular disease (CVD) mortality, conventional measurements failed to identify lipoprotein particle sizes. This study aimed to investigate associations of lipoprotein subclasses categorized by particle sizes with risk of all-cause and CVD mortality in individuals with type 2 diabetes. METHODS This study included 6575 individuals with type 2 diabetes from the UK Biobank. Concentrations of very low-, low-, intermediate- and high-density lipoprotein [very-low-density lipoprotein (VLDL), low-density lipoprotein (LDL), intermediate-density lipoprotein and high-density lipoprotein (HDL)] particles in 14 subclasses and lipid constituents within each subclass were measured by quantitative nuclear magnetic resonance. Multivariable-adjusted Cox proportional-hazard regression models were used to estimate the hazard ratio (HR) for per standard deviation increment of log-transformed lipoprotein subclasses with risk of mortality. All p-values were adjusted by the false discovery rate method. RESULTS During a median follow-up of 11.4 years, 943 deaths were documented, including 310 CVD deaths. Small HDL particles were inversely associated with CVD mortality, with HR (95% CI) of 0.78 (0.69, 0.87), whereas very large and large HDL particles were positively associated with CVD mortality with HR (95% CI) of 1.28 (1.12, 1.45) and 1.19 (1.05, 1.35), respectively. A similar pattern was observed for all-cause mortality [small HDL particle (HR, 95% CI): 0.79, 0.74-0.85; large HDL particle: 1.15, 1.07-1.24; very large HDL particle: 1.26, 1.17-1.36]. For VLDL and LDL, very small VLDL particle was positively, while medium LDL particle was inversely associated with all-cause mortality, but not associated with CVD mortality. The pattern of association with all-cause and CVD mortality for cholesterol and triglyceride within lipoprotein particles was similar to those for lipoprotein particles themselves. CONCLUSIONS The associations between lipoprotein particles, particularly HDL particles, with all-cause and CVD mortality among patients with type 2 diabetes were significantly varied by particle sizes, highlighting the importance of particle size as a lipoprotein metric in mortality risk discrimination.
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Affiliation(s)
- Rui Li
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, and State Key Laboratory of Environment Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jun-Xiang Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qi Lu
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, and State Key Laboratory of Environment Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting-Ting Geng
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, and State Key Laboratory of Environment Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng-Fei Xia
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liang-Kai Chen
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, and State Key Laboratory of Environment Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhi-Lei Shan
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, and State Key Laboratory of Environment Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - An Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gang Liu
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, and State Key Laboratory of Environment Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Ma S, Xia M, Gao X. Biomarker Discovery in Atherosclerotic Diseases Using Quantitative Nuclear Magnetic Resonance Metabolomics. Front Cardiovasc Med 2021; 8:681444. [PMID: 34395555 PMCID: PMC8356911 DOI: 10.3389/fcvm.2021.681444] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/02/2021] [Indexed: 12/23/2022] Open
Abstract
Despite great progress in the management of atherosclerosis (AS), its subsequent cardiovascular disease (CVD) remains the leading cause of morbidity and mortality. This is probably due to insufficient risk detection using routine lipid testing; thus, there is a need for more effective approaches relying on new biomarkers. Quantitative nuclear magnetic resonance (qNMR) metabolomics is able to phenotype holistic metabolic changes, with a unique advantage in regard to quantifying lipid-protein complexes. The rapidly increasing literature has indicated that qNMR-based lipoprotein particle number, particle size, lipid components, and some molecular metabolites can provide deeper insight into atherogenic diseases and could serve as novel promising determinants. Therefore, this article aims to offer an updated review of the qNMR biomarkers of AS and CVD found in epidemiological studies, with a special emphasis on lipoprotein-related parameters. As more researches are performed, we can envision more qNMR metabolite biomarkers being successfully translated into daily clinical practice to enhance the prevention, detection and intervention of atherosclerotic diseases.
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Affiliation(s)
- Shuai Ma
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China.,Fudan Institute for Metabolic Diseases, Shanghai, China.,Human Phenome Institute, Fudan University, Shanghai, China
| | - Mingfeng Xia
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China.,Fudan Institute for Metabolic Diseases, Shanghai, China
| | - Xin Gao
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, China.,Fudan Institute for Metabolic Diseases, Shanghai, China
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Abstract
The formation of reactive metabolites (RMs) is a problem in drug development that sometimes results in severe hepatotoxicity. As detecting RMs themselves is difficult, a covalent binding assay using expensive radiolabelled tracers is usually performed for candidate selection. This study aimed to provide a practical approach toward the risk assessment of hepatotoxicity induced by covalent binding before candidate selection. We focused on flutamide because it contains a trifluoromethyl group that shows a strong singlet peak by 19F nuclear magnetic resonance (NMR) spectrometry. The covalent binding of flutamide was evaluated using quantitative NMR and its risk for hepatotoxicity was assessed by estimating the RM burden, an index that reflects the body burden associated with RM exposure by determining the extent of covalent binding, clinical dose and in vivo clearance. The extent of covalent binding and RM burden was 296 pmol/mg/h and 37.9 mg/day, respectively. Flutamide was categorised as high risk with an RM burden >10 mg/day consistent with its clinical hepatotoxicity. These results indicate that a combination of covalent binding assay using 19F-NMR and RM burden is useful for the risk assessment of RMs without using radiolabelled compounds.
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Affiliation(s)
- Nobuyuki Kakutani
- Drug Metabolism and Pharmacokinetics Research Laboratories, Japan Tobacco Inc, Takatsuki, Japan
| | - Takahiro Iwai
- Product Development Laboratories, Japan Tobacco Inc, Takatsuki, Japan
| | - Yasushi Ohno
- Product Development Laboratories, Japan Tobacco Inc, Takatsuki, Japan
| | - Satoru Kobayashi
- Drug Metabolism and Pharmacokinetics Research Laboratories, Japan Tobacco Inc, Takatsuki, Japan
| | - Yukihiro Nomura
- Drug Metabolism and Pharmacokinetics Research Laboratories, Japan Tobacco Inc, Takatsuki, Japan
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Heard-Lipsmeyer ME, Hull H, Sims CR, Cleves MA, Andres A. Evaluating body composition in infancy and childhood: A comparison between 4C, QMR, DXA, and ADP. Pediatr Obes 2020; 15:e12617. [PMID: 31986239 PMCID: PMC7323309 DOI: 10.1111/ijpo.12617] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 12/11/2019] [Accepted: 01/02/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Accurate and precise methods to measure of body composition in infancy and childhood are needed. OBJECTIVES This study evaluated differences and precision of three methods when compared with the four-compartment (4C) model for estimating fat mass (FM). METHODS FM of children (age 14 days to 6 years of age, N = 346) was obtained using quantitative nuclear magnetic resonance (QMR, EchoMRI-AH), air-displacement plethysmography (ADP, PeaPod, less than or equal to 8 kg, BodPod age 6 years or older), and dual-energy X-ray absorptiometry (DXA, Hologic QDR). The 4C model was computed. Correlation, concordance, and Bland-Altman analyses were performed. RESULTS In infants, PeaPod had high individual FM accuracy, whereas DXA had high group FM accuracy compared with 4C. In children, DXA had high group and individual FM accuracies compared with 4C. QMR underestimated group FM in infants and children (300 and 510 g, respectively). The instrument FM precision was best for QMR (10 g) followed by BodPod (34 g), PeaPod (38 g), and DXA (45 g). CONCLUSIONS In infants, PeaPod was the best method to estimate individual FM whereas DXA was best to estimate group FM. In children, DXA was best to estimate individual and group FM. QMR had the highest instrument precision.
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Affiliation(s)
- Melissa E. Heard-Lipsmeyer
- Arkansas Children’s Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas,Department of Pediatrics University of Arkansas for Medical Sciences, Little Rock, Arkansas,Division of Cell Biology and Physiology, Edward Via College of Osteopathic Medicine-Louisiana Campus, Monroe, Louisiana
| | - Holly Hull
- Department of Dietetics and Nutrition, University of Kansas Medical Center, Kansas City, Kansas
| | - Clark R. Sims
- Arkansas Children’s Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Mario A. Cleves
- Arkansas Children’s Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Aline Andres
- Arkansas Children’s Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas,Department of Pediatrics University of Arkansas for Medical Sciences, Little Rock, Arkansas
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Diamantakos P, Giannara T, Skarkou M, Melliou E, Magiatis P. Influence of Harvest Time and Malaxation Conditions on the Concentration of Individual Phenols in Extra Virgin Olive Oil Related to Its Healthy Properties. Molecules 2020; 25:molecules25102449. [PMID: 32456326 PMCID: PMC7287853 DOI: 10.3390/molecules25102449] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/18/2020] [Accepted: 05/21/2020] [Indexed: 11/16/2022] Open
Abstract
The phenolic fraction of the extra virgin olive oil (EVOO) has been studied over the past two decades because of its important health protective properties. Numerous studies have been performed in order to clarify the most crucial factors that affect the concentration of the EVOO’s phenolic fraction and many contradictory results have been reported. Having as target to maximize the phenolic content of EVOO and its healthy properties we investigated the impact of harvest time, malaxation temperature, and malaxation duration on the concentration of individual phenols in extra virgin olive oil. Olive oil was prepared in a lab-scale olive mill from different varieties in Greece. The extraction process for cultivar (cv) Koroneiki samples was performed at five different harvest periods from the same trees with three different malaxation temperatures and five different malaxation duration times (N = 75). Similar types of experiments were also performed for other varieties: cv Athenolia (N = 20), cv Olympia (N = 3), cv Kalamata (N = 3), and cv Throubolia Aegean (N=3) in order to compare the changes in the phenolic profile during malaxation. The quantitative analysis of the olive oil samples with NMR showed that the total phenolic content has a negative correlation with the ripening degree and the malaxation time. The NMR data we collected helped us to quantitate not only the total phenolic content but also the concentration of the major phenolic compounds such as oleocanthal, oleacein, oleokoronal, and oleomissional. We noticed different trends for the concentration of these phenols during malaxation process and for different malaxation temperatures. The different trends of the concentration of the individual phenols during malaxation and the completely different behavior of each variety revealed possible biosynthetic formation steps for oleocanthal and oleacein and may explain the discrepancies reported from previous studies.
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Ciepielowski G, Pacholczyk-Sienicka B, Klajman K, Paneth P, Albrecht Ł. The influence of experimental parameters on quantitative deuterium measurements for ethyl alcohols of different origin. J Sci Food Agric 2020; 100:1812-1815. [PMID: 31821575 DOI: 10.1002/jsfa.10191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/26/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Quantitative determination with site-specific natural isotope fractionation nuclear magnetic resonance (SNIF-NMR) has been exploited widely in detecting adulteration and for the classification of natural products by their geographical origin. RESULTS We compared isotopic parameters such as deuterium / hydrogen (D/H) site specific ratios and the R parameter for alcoholic beverages, obtained using (i) a 500 MHz spectrometer equipped with a dedicated probe for isotopic measurements, and (ii) a 700 MHz spectrometer equipped with a standard probe. The factors affecting the accuracy and precision of quantitative NMR with the second instrument have been explored. CONCLUSIONS It has been demonstrated that, in laboratories with a spectrometer that is not equipped with a specific deuterium probe, the selection of the appropriate experimental parameters enables measurements with a similar precision and accuracy as in the case of the official method adopted by the International Organisation of Vine and Wine. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Grzegorz Ciepielowski
- Institute of Organic Chemistry, Faculty of Chemistry, Łódź University of Technology, Łódź, Lodz University of Technology, Lodz, Poland
- Product Authentication Laboratory, Bionanopark Ltd, Lodz, Poland
| | - Barbara Pacholczyk-Sienicka
- Institute of Organic Chemistry, Faculty of Chemistry, Łódź University of Technology, Łódź, Lodz University of Technology, Lodz, Poland
| | - Kamila Klajman
- Institute of Applied Radiation Chemistry, Łódź University of Technology, Łódź, Lodz University of Technology, Lodz, Poland
- Product Authentication Laboratory, Bionanopark Ltd, Lodz, Poland
| | - Piotr Paneth
- Institute of Applied Radiation Chemistry, Łódź University of Technology, Łódź, Lodz University of Technology, Lodz, Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry, Faculty of Chemistry, Łódź University of Technology, Łódź, Lodz University of Technology, Lodz, Poland
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Cavalcante RAF, Silva FL, Favero F, Resck IS, Pereira AL, Machado AHL. Quantitative 1 H NMR spectroscopy (qNMR) in the early process development of a new quorum sensing inhibitor. Magn Reson Chem 2020; 58:31-40. [PMID: 31254358 DOI: 10.1002/mrc.4906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/28/2019] [Accepted: 06/19/2019] [Indexed: 06/09/2023]
Abstract
2-methyl-5,6,7,8-tetrahydro-2H-chromen-4(3H)-one (called 6-oxo) is presented as a new AI-1 quorum sensing inhibitor for Vibrio harveyi. The development of a chemical process to afford traceable materials for new biological assays demands the development of analytical methods to ensure their purity and quality. This work describes the use of quantitative 1 H nuclear magnetic resonance (NMR) spectroscopy (qNMR) to assess the purity of a sample of 6-oxo (99.88%) and a sample of its major process impurity (E)-1-(2-hydroxycyclohex-2-en-1-yl)but-2-en-1-one (called HCB; 98.28%). To explore the scope of the use of qNMR to quantify the amount of low-content components in samples related to the chemical process for 6-oxo synthesis, this work also determined the amount of 6-oxo in two HCB samples: (a) the high-purity HCB sample described above and (b) a crude HCB sample collected during the chemical process. Despite the complexity of the crude sample, the amount of 6-oxo was readily assessed and could help to estimate the extent to which 6-oxo was already formed during the HCB synthesis. This information can help the understanding of how the process parameters can be modified to improve the performance of the whole process, by controlling the reaction mechanisms working at each step of this chemical process. In this context, our results reinforce qNMR as a complementary analytical tool for the quantification of the main component found in a sample, contributing to the standardization of reference materials and thus allowing the development of analytical methods for process control and traceability of the samples used for biological assays.
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Affiliation(s)
- Robson A F Cavalcante
- Instituto de Química, Universidade de Brasília, Campus Universitário Darcy Ribeiro, CEP 70910-900, Asa Norte, Brasília, -DF, Brazil
| | - Felipe L Silva
- Campus de Ceilândia, Universidade de Brasília, Centro Metropolitano, CEP: 72220-275, Ceilândia Sul, Ceilândia, -DF, Brazil
| | - Fernanda Favero
- Instituto de Química, Universidade de Brasília, Campus Universitário Darcy Ribeiro, CEP 70910-900, Asa Norte, Brasília, -DF, Brazil
- Campus de Ceilândia, Universidade de Brasília, Centro Metropolitano, CEP: 72220-275, Ceilândia Sul, Ceilândia, -DF, Brazil
| | - Inês S Resck
- Instituto de Química, Universidade de Brasília, Campus Universitário Darcy Ribeiro, CEP 70910-900, Asa Norte, Brasília, -DF, Brazil
| | - Alex L Pereira
- Campus de Ceilândia, Universidade de Brasília, Centro Metropolitano, CEP: 72220-275, Ceilândia Sul, Ceilândia, -DF, Brazil
| | - Angelo H L Machado
- Instituto de Química, Universidade de Brasília, Campus Universitário Darcy Ribeiro, CEP 70910-900, Asa Norte, Brasília, -DF, Brazil
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Ioannidis K, Melliou E, Magiatis P. High-Throughput 1H-Nuclear Magnetic Resonance-Based Screening for the Identification and Quantification of Heartwood Diterpenic Acids in Four Black Pine ( Pinus nigra Arn.) Marginal Provenances in Greece. Molecules 2019; 24:E3603. [PMID: 31591296 DOI: 10.3390/molecules24193603] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/26/2019] [Accepted: 10/01/2019] [Indexed: 11/16/2022] Open
Abstract
A high-throughput quantitative Nuclear Magnetic Resonance 1H-NMR method was developed and applied to screen the quantity of the diterpenic resin acids in the heartwood of black pine, due to the renewed scientific interest in their medicinal properties and use in various diseases treatment. The 260 samples were taken from Pinus nigra clones, selected from four provenances of the Peloponnese (Greece), participating in a 35-year-old clonal seed orchard. Total resin acids per dry heartwood weight (dhw) varied greatly, ranging from 30.05 to 424.70 mg/gdhw (average 219.98 mg/gdhw). Abietic was the predominant acid (76.77 mg/gdhw), followed by palustric acid (47.94 mg/gdhw), neoabietic acid (39.34 mg/gdhw), and pimaric acid (22.54 mg/gdhw). Dehydroabietic acid was at moderate levels (11.69 mg/gdhw), while levopimaric, isopimaric, and sandaracopimaric acids were in lower concentrations. The resin acid fraction accounted for 72.33% of the total acetone extractives. Stilbenes were presented in significant quantities (19.70%). The resin acid content was composed mainly of the abietane type resin acids (83.56%). Peloponnesian Pinus nigra heartwood was found to be the richest source of resin acids identified to date and is considered the best natural source for the production of such bioactive extracts. The results indicate a high potential for effective selection and advanced breeding of pharmaceutical and high economic value bioactive substances from Pinus nigra clones.
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Yu C, Zhang Q, Xu PY, Bai Y, Shen WB, Di B, Su MX. Quantitative determination and validation of octreotide acetate using 1 H-NMR spectroscopy with internal standard method. Magn Reson Chem 2018; 56:37-45. [PMID: 28921691 DOI: 10.1002/mrc.4665] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 09/04/2017] [Accepted: 09/09/2017] [Indexed: 06/07/2023]
Abstract
Quantitative nuclear magnetic resonance (qNMR) is a well-established technique in quantitative analysis. We presented a validated 1 H-qNMR method for assay of octreotide acetate, a kind of cyclic octopeptide. Deuterium oxide was used to remove the undesired exchangeable peaks, which was referred to as proton exchange, in order to make the quantitative signals isolated in the crowded spectrum of the peptide and ensure precise quantitative analysis. Gemcitabine hydrochloride was chosen as the suitable internal standard. Experimental conditions, including relaxation delay time, the numbers of scans, and pulse angle, were optimized first. Then method validation was carried out in terms of selectivity, stability, linearity, precision, and robustness. The assay result was compared with that by means of high performance liquid chromatography, which is provided by Chinese Pharmacopoeia. The statistical F test, Student's t test, and nonparametric test at 95% confidence level indicate that there was no significant difference between these two methods. qNMR is a simple and accurate quantitative tool with no need for specific corresponding reference standards. It has the potential of the quantitative analysis of other peptide drugs and standardization of the corresponding reference standards.
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Affiliation(s)
- Chen Yu
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, China
| | - Qian Zhang
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, China
| | - Peng-Yao Xu
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, China
| | - Yin Bai
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, China
| | - Wen-Bin Shen
- Center for Instrumental Analysis, China Pharmaceutical University, Nanjing, 210009, China
| | - Bin Di
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, China
- Key Laboratory on Protein Chemistry and Structural Biology, China Pharmaceutical University, Nanjing, 210009, China
| | - Meng-Xiang Su
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 210009, China
- Key Laboratory on Protein Chemistry and Structural Biology, China Pharmaceutical University, Nanjing, 210009, China
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Ioannidis K, Melliou E, Alizoti P, Magiatis P. Identification of black pine (Pinus nigra Arn.) heartwood as a rich source of bioactive stilbenes by qNMR. J Sci Food Agric 2017; 97:1708-1716. [PMID: 27739141 DOI: 10.1002/jsfa.8090] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/24/2016] [Accepted: 10/08/2016] [Indexed: 05/24/2023]
Abstract
BACKGROUND Recently published studies have demonstrated the strong anti-inflammatory properties of Scots pine (Pinus sylvestris L.) heartwood extracts, related to its stilbene content. In order to find alternative sources of Pinus heartwood extracts rich in stilbenes, a large number of samples were investigated, using a new developed high-throughput screening method based on quantitative nuclear magnetic resonance. RESULTS The new method enabled us to measure the levels of pinosylvin, pinosylvin monomethyl ether and pinosylvin dimethyl ether in heartwood extracts in only 45 s per sample. The method was applied to 260 Pinus nigra trees originating from Peloponnese (southern Greece) from four different natural populations of the species. The results obtained showed that the total stilbenoids per dry heartwood weight varied greatly, ranging from 10.9 to 128.2 mg g-1drywood (average 59.92 ± 21.79 mg g-1drywood ). The major stilbene in all cases was pinosylvin monomethyl ether (40.32 ± 15.55 mg g-1drywood ), followed by pinosylvin (17.07±6.76 mg g-1drywood ) and pinosylvin dimethyl ether (2.54 ± 1.22 mg g-1drywood ). The highest stilbene content of P. nigra samples was found to be 6.3 times higher than the highest reported figure for P. sylvestris L. CONCLUSION Pinus nigra heartwood is the richest source of pinosylvin and pinosylvin monomethyl ether identified to date and can be considered the best natural resource for production of bioactive extracts. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Kostas Ioannidis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
- Laboratory of Forest Genetics and Tree Improvement, Faculty of Forestry and Natural Environment, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
- Laboratory of Forest Genetics and Biotechnology, Institute of Mediterranean and Forest Ecosystems, Hellenic Agricultural Organization "Demeter", Ilissia, 11528, Athens, Greece
| | - Eleni Melliou
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
| | - Paraskevi Alizoti
- Laboratory of Forest Genetics and Tree Improvement, Faculty of Forestry and Natural Environment, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Prokopios Magiatis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
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Ioannidis K, Melliou E, Alizoti P, Magiatis P. Identification of black pine (Pinus nigra Arn.) heartwood as a rich source of bioactive stilbenes by qNMR. J Sci Food Agric 2017; 97:1708-1716. [PMID: 27739141 DOI: 10.1002/jsfa8090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/24/2016] [Accepted: 10/08/2016] [Indexed: 05/26/2023]
Abstract
BACKGROUND Recently published studies have demonstrated the strong anti-inflammatory properties of Scots pine (Pinus sylvestris L.) heartwood extracts, related to its stilbene content. In order to find alternative sources of Pinus heartwood extracts rich in stilbenes, a large number of samples were investigated, using a new developed high-throughput screening method based on quantitative nuclear magnetic resonance. RESULTS The new method enabled us to measure the levels of pinosylvin, pinosylvin monomethyl ether and pinosylvin dimethyl ether in heartwood extracts in only 45 s per sample. The method was applied to 260 Pinus nigra trees originating from Peloponnese (southern Greece) from four different natural populations of the species. The results obtained showed that the total stilbenoids per dry heartwood weight varied greatly, ranging from 10.9 to 128.2 mg g-1drywood (average 59.92 ± 21.79 mg g-1drywood ). The major stilbene in all cases was pinosylvin monomethyl ether (40.32 ± 15.55 mg g-1drywood ), followed by pinosylvin (17.07±6.76 mg g-1drywood ) and pinosylvin dimethyl ether (2.54 ± 1.22 mg g-1drywood ). The highest stilbene content of P. nigra samples was found to be 6.3 times higher than the highest reported figure for P. sylvestris L. CONCLUSION Pinus nigra heartwood is the richest source of pinosylvin and pinosylvin monomethyl ether identified to date and can be considered the best natural resource for production of bioactive extracts. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Kostas Ioannidis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
- Laboratory of Forest Genetics and Tree Improvement, Faculty of Forestry and Natural Environment, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
- Laboratory of Forest Genetics and Biotechnology, Institute of Mediterranean and Forest Ecosystems, Hellenic Agricultural Organization "Demeter", Ilissia, 11528, Athens, Greece
| | - Eleni Melliou
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
| | - Paraskevi Alizoti
- Laboratory of Forest Genetics and Tree Improvement, Faculty of Forestry and Natural Environment, School of Agriculture, Forestry and Natural Environment, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Prokopios Magiatis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
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