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Lv M, Wang L, Guo Y, Yao J. NMR-based metabolomics reveals tissue metabolic responses to tetramethoxy gossypol in cottonseed oil. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:6169-6174. [PMID: 35808803 DOI: 10.1002/jsfa.12115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 06/14/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Cottonseed oil is one of the most widely consumed cooking oils because of its high nutritional benefits and relatively low price. The present study evaluated the effects of tetramethoxy gossypol (TMG), a rarely reported degradation product of free gossypol produced in crudely extracted cottonseed oil, on the metabolic responses of liver, heart, spleen, kidney and lung tissues in rats using proton nuclear magnetic resonance (1 H NMR) spectroscopy combined with chemometric and bioinformatics techniques. RESULTS Endogenous low-molecular-weight metabolites in rat liver, heart, spleen, kidney and lung tissues were profiled by 1 H NMR spectroscopy. The unsupervised principal components analysis and the supervised orthogonal partial least squares discriminant analysis revealed that the metabolic profiles in liver samples were greatly changed after TMG administration. Twenty significantly changed liver metabolites were screened out and further evaluated by receiver operating characteristic curve analysis, which were closely related to amino acid, glutathione, energy and lipid metabolism. CONCLUSION Concerning the potential chronic exposure to TMG in cottonseed oil and other cottonseed products, the cumulative effects of dietary TMG on tissues, especially the liver, should be noted when improving the quality control standard of cottonseed oil. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Mengying Lv
- Department of Pharmacy, Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou, China
| | - Lei Wang
- School of Pharmacy, Xinjiang Medical University, Urumqi, China
| | - Yujuan Guo
- School of Pharmacy, Xinjiang Medical University, Urumqi, China
| | - Jun Yao
- School of Pharmacy, Xinjiang Medical University, Urumqi, China
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Yaqun L, Hanxu L, Wanling L, Yingzhu X, Mouquan L, Yuzhong Z, Lei H, Yingkai Y, Yidong C. SPME-GC-MS combined with chemometrics to assess the impact of fermentation time on the components, flavor, and function of Laoxianghuang. Front Nutr 2022; 9:915776. [PMID: 35983487 PMCID: PMC9378830 DOI: 10.3389/fnut.2022.915776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/30/2022] [Indexed: 11/16/2022] Open
Abstract
Laoxianghuang, fermented from Citrus medica L. var. Sarcodactylis Swingle of the Rutaceae family, is a medicinal food. The volatiles of Laoxianghuang fermented in different years were obtained by solid-phase microextraction combined with gas chromatography–mass spectrometry (SPME-GC–MS). Meanwhile, the evolution of its component-flavor function during the fermentation process was explored in depth by combining chemometrics and performance analyses. To extract the volatile compounds from Laoxianghuang, the fiber coating, extraction time, and desorption temperature were optimized in terms of the number and area of peaks. A polydimethylsiloxane/divinylbenzene (PDMS/DVB) with a thickness of 65 μm fiber, extraction time of 30 min, and desorption temperature of 200 °C were shown to be the optimal conditions. There were 42, 44, 52, 53, 53, and 52 volatiles identified in the 3rd, 5th, 8th, 10th, 15th, and 20th years of fermentation of Laoxianghuang, respectively. The relative contents were 97.87%, 98.50%, 98.77%, 98.85%, 99.08%, and 98.36%, respectively. Terpenes (mainly limonene, γ-terpinene and cymene) displayed the highest relative content and were positively correlated with the year of fermentation, followed by alcohols (mainly α-terpineol, β-terpinenol, and γ-terpineol), ketones (mainly cyclohexanone, D(+)-carvone and β-ionone), aldehydes (2-furaldehyde, 5-methylfurfural, and 1-nonanal), phenols (thymol, chlorothymol, and eugenol), esters (bornyl formate, citronellyl acetate, and neryl acetate), and ethers (n-octyl ether and anethole). Principal component analysis (PCA) and hierarchical cluster analysis (HCA) showed a closer relationship between the composition of Laoxianghuang with similar fermentation years of the same gradient (3rd-5th, 8th-10th, and 15th-20th). Partial least squares discriminant analysis (PLS-DA) VIP scores and PCA-biplot showed that α-terpineol, γ-terpinene, cymene, and limonene were the differential candidate biomarkers. Flavor analysis revealed that Laoxianghuang exhibited wood odor from the 3rd to the 10th year of fermentation, while herb odor appeared in the 15th and the 20th year. This study analyzed the changing pattern of the flavor and function of Laoxianghuang through the evolution of the composition, which provided a theoretical basis for further research on subsequent fermentation.
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Affiliation(s)
- Liu Yaqun
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, China.,Guangdong Provincial Key Laboratory of Functional Substances in Medicinal Edible Resources and Healthcare Products, Chaozhou, China
| | - Liu Hanxu
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, China
| | - Lin Wanling
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, China.,Guangdong Provincial Key Laboratory of Functional Substances in Medicinal Edible Resources and Healthcare Products, Chaozhou, China
| | - Xue Yingzhu
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou, China
| | - Liu Mouquan
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, China.,Guangdong Provincial Key Laboratory of Functional Substances in Medicinal Edible Resources and Healthcare Products, Chaozhou, China
| | - Zheng Yuzhong
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, China.,Guangdong Provincial Key Laboratory of Functional Substances in Medicinal Edible Resources and Healthcare Products, Chaozhou, China
| | - Hu Lei
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, China.,Guangdong Provincial Key Laboratory of Functional Substances in Medicinal Edible Resources and Healthcare Products, Chaozhou, China
| | - Yang Yingkai
- Guangdong Jigong Healthy Food Co., Ltd, Chaozhou, China
| | - Chen Yidong
- Guangdong Jigong Healthy Food Co., Ltd, Chaozhou, China
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Mufti A, Tir M, Zarei A, Contreras MDM, Gómez-Cruz I, Feriani A, Ghazouani L, Saadaoui E, Allagui MS, Harrath AH, Ramazani A, Tlili N. Phytochemical Profiling of Ephedra alata subsp. alenda Seeds by High-Performance Liquid Chromatography—Electrospray Ionization—Quadrupole-Time-of-Flight-Mass Spectrometry (HPLC-ESI-QTOF-MS), Molecular Docking, and Antioxidant, Anti-diabetic, and Acetylcholinesterase Inhibition. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2059082] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Afoua Mufti
- Laboratory of Biotechnology and Biomonitoring of the Environment and Oasis Ecosystems, Faculty of Sciences of Gafsa, 2112 Gafsa, Tunisia
| | - Meriam Tir
- Laboratoire d’Ecologie, de Biologie et de Physiologie des Organismes Aquatiques, LR18ES41, Faculté des Sciences de Tunis, Université Tunis EL Manar, 2092 Tunis, Tunisia
| | - Armin Zarei
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran
| | - María del Mar Contreras
- Department of Chemical, Environmental and Materials Engineering and Centre for Advanced Studies in Earth Sciences, Energy and Environment (CEACTEMA), Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Irene Gómez-Cruz
- Department of Chemical, Environmental and Materials Engineering and Centre for Advanced Studies in Earth Sciences, Energy and Environment (CEACTEMA), Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Anouar Feriani
- Laboratory of Biotechnology and Biomonitoring of the Environment and Oasis Ecosystems, Faculty of Sciences of Gafsa, 2112 Gafsa, Tunisia
| | - Lakhdar Ghazouani
- Laboratory of Biotechnology and Biomonitoring of the Environment and Oasis Ecosystems, Faculty of Sciences of Gafsa, 2112 Gafsa, Tunisia
| | - Ezzeddine Saadaoui
- Institut National de Recherches en Génie Rural, Eaux et Forêts (LGVRF), Université de Carthage, BP 10, Ariana, 2080, Tunisia
| | - Mohamed Salah Allagui
- Laboratory of Biotechnology and Biomonitoring of the Environment and Oasis Ecosystems, Faculty of Sciences of Gafsa, 2112 Gafsa, Tunisia
| | - Abdel Halim Harrath
- King Saud University, Department of Zoology, College of Science, Riyadh 11451, Saudi Arabia
| | - Ali Ramazani
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran
- Department of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan, Zanjan 45371-38791, Iran
| | - Nizar Tlili
- Institut Supérieur des Sciences et Technologies de l’Environnement, Université de Carthage, Tunisia
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Profiles of Essential Oils and Correlations with Phenolic Acids and Primary Metabolites in Flower Buds of Magnolia heptapeta and Magnolia denudata var. purpurascens. MOLECULES (BASEL, SWITZERLAND) 2021; 27:molecules27010221. [PMID: 35011454 PMCID: PMC8746637 DOI: 10.3390/molecules27010221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 12/28/2021] [Accepted: 12/28/2021] [Indexed: 01/07/2023]
Abstract
Magnolia flower buds are a source of herbal medicines with various active compounds. In this study, differences in the distribution and abundance of major essential oils, phenolic acids, and primary metabolites between white flower buds of Magnolia heptapeta and violet flower buds of Magnolia denudata var. purpurascens were characterised. A multivariate analysis revealed clear separation between the white and violet flower buds with respect to primary and secondary metabolites closely related to metabolic systems. White flower buds contained large amounts of monoterpene hydrocarbons (MH), phenolic acids, aromatic amino acids, and monosaccharides, related to the production of isoprenes, as MH precursors, and the activity of MH synthase. However, concentrations of β-myrcene, a major MH compound, were higher in violet flower buds than in white flower buds, possibly due to higher threonine levels and low acidic conditions induced by comparatively low levels of some organic acids. Moreover, levels of stress-related metabolites, such as oxygenated monoterpenes, proline, and glutamic acid, were higher in violet flower buds than in white flower buds. Our results support the feasibility of metabolic profiling for the identification of phytochemical differences and improve our understanding of the correlated biological pathways for primary and secondary metabolites.
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Seif M, Deabes M, El-Askary A, El-Kott AF, Albadrani GM, Seif A, Wang Z. Ephedra sinica mitigates hepatic oxidative stress and inflammation via suppressing the TLR4/MyD88/NF-κB pathway in fipronil-treated rats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:62943-62958. [PMID: 34218381 DOI: 10.1007/s11356-021-15142-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/22/2021] [Indexed: 06/13/2023]
Abstract
Ephedra sinica (ES) is a promising medicinal plant with a wide range of pharmacological aspects, including antioxidant and anti-inflammatory properties. Fipronil (FN) is a popularly used systemic insecticide in agriculture and veterinary applications. FN exposure can result in a variety of negative health consequences. The study aimed to explore the prophylactic effects of Ephedra sinica extract (ESE) against hepatotoxicity in FN-treated rats by following the TLR4/ MyD88/ NF-κB pathway. ESE was tested for polyphenolic and antioxidant activity. Forty rats were separated into four groups and given orally by FN (10 mg/kg B.W.) and/or ESE (150 mg/kg B.W.). Blood and tissue samples were collected at the end of the experiment and prepared for pathophysiological, gene expression, and pathological analysis. ESE showed strong antioxidant activity, as well as reduced levels of hepatic MDA and oxidative stress markers (H2O2, NO). Hepatic SOD and CAT activities were increased even further. Furthermore, in FN-treated rats, ESE improved liver functions (ALT, AST, ALP, and LDH) and recovered the lipid profile (Cho, TriG, HDL, and LDL). Moreover, by inhibiting TLR4/ MyD88/ NF-κB induction, ESE alleviated hepatic pathological changes and decreased FN-induced elevations of TNF-α, IL-6, and IL-1β mRNA/protein levels. These findings suggested that ESE mitigated FN-induced hepatotoxicity via combating oxidative stress and relieving inflammation.
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Affiliation(s)
- Mohamed Seif
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China.
- Toxicology and Food Contaminants Department, Food Industries and Nutrition Research Division, National Research Centre, Dokki, Giza, P.O, 12622, Egypt.
| | - Mohamed Deabes
- Toxicology and Food Contaminants Department, Food Industries and Nutrition Research Division, National Research Centre, Dokki, Giza, P.O, 12622, Egypt
| | - Ahmad El-Askary
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Attalla F El-Kott
- Biology Department, Faculty of Science, King Khalid University, Abha, 61421, Saudi Arabia
- Zoology Department, College of Science, Damanhour University, Damanhour, 22511, Egypt
| | - Ghadeer M Albadrani
- Department of Biology, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, 11474, Saudi Arabia
| | - Amr Seif
- Faculty of Medicine, Assuit University, Asyut, 71516, Egypt
| | - Zaizhao Wang
- College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China
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Effect of Drying Methods on Volatile Compounds of Burdock ( Arctium lappa L.) Root Tea as Revealed by Gas Chromatography Mass Spectrometry-Based Metabolomics. Foods 2021; 10:foods10040868. [PMID: 33921154 PMCID: PMC8071549 DOI: 10.3390/foods10040868] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/09/2021] [Accepted: 04/13/2021] [Indexed: 12/16/2022] Open
Abstract
Burdock (Arctium lappa L.) is one of the nutritional foods widely planted in many countries. Dried burdock root (BR) is available as a herbal tincture and tea in many Asian countries with good flavor and taste. In this study, the volatile components in dried BR were identified and the effects of different drying methods on the volatile components were investigated by HS-GC-MS method. A total of 49 compounds were identified. Different drying methods including hot-air drying (HD, at 50, 60, 70, and 80 °C), vacuum drying (VD, at 50, 60, 70, and 80 °C), sunlight drying (SD), natural drying (ND), and vacuum freeze drying (VFD) were evaluated by HS-GC-MS-based metabolomics method. Results showed that different drying methods produced different effects on the volatile compounds. It was observed that 2,3-pentanedione, 1-(1H-pyrrol-2-yl)-ethanone, furfural, and heptanal were detected at higher concentrations in HD 80 and VD 70. The traditional HD and SD methods produced more flavor substances than VFD. The BR treated by the VFD method could maintain the shape of the fresh BR pieces while HD50 and VD80 methods could maintain the color of fresh BR pieces. These findings could help better understand the flavor of the corresponding processed BR and provide a guide for the drying and processing of BR tea.
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Sun H, Liu Q, Zhou J, Guo L. Metabolomics reveals the influences of smoke-water and karrikinolide on the biosynthesis of flavonoids and terpenoids in Salvia miltiorrhiza. FUNCTIONAL PLANT BIOLOGY : FPB 2021; 48:321-332. [PMID: 33242388 DOI: 10.1071/fp20172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 10/21/2020] [Indexed: 06/11/2023]
Abstract
Metabolomics was used to study the influences of smoke-water (SW) and karrikinolide (KAR1) on the biosynthesis of flavonoids and terpenoids in Salvia miltiorrhiza Bunge. The results showed that a total of 178 and 199 differential metabolites were obtained in SW and KAR1, respectively, compared to the control. The differential metabolites were assigned to the corresponding metabolic pathways. The results indicated that some metabolic pathways in treatments of SW and KAR1 overlapped, suggesting that treatments of SW and KAR1 showed similar effects on the metabolic mechanism of S. miltiorrhiza. To obtain a clear overview of changes in metabolic regulation, TCA cycle, glycolytic pathway, biosynthesis of flavonoids and terpenoids and amino acids metabolism pathway were mapped into a network. We found that treatments with SW and KAR1 could significantly promote the biosynthesis of flavonoids and terpenoids in S. miltiorrhiza. This study could help us better understand the influences of SW and KAR1 on secondary metabolites and their underlying mechanism.
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Affiliation(s)
- Hui Sun
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Qian Liu
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Jie Zhou
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China; and Corresponding authors. ;
| | - Lanping Guo
- State Key Laboratory of Dao-di Herbs, National Resource Center for Chinese Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China; and Corresponding authors. ;
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Identification of Antidiabetic Metabolites from Paederia foetida L. Twigs by Gas Chromatography-Mass Spectrometry-Based Metabolomics and Molecular Docking Study. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7603125. [PMID: 31275982 PMCID: PMC6560335 DOI: 10.1155/2019/7603125] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 05/14/2019] [Indexed: 01/06/2023]
Abstract
Paederia foetida L. (Rubiaceae) is a climber which is widely distributed in Asian countries including Malaysia. The plant is traditionally used to treat various diseases including diabetes. This study is to evaluate the enzymatic inhibition activity of Paederia foetida twigs extracts and to identify the metabolites responsible for the bioactivity by gas chromatography-mass spectrometry (GC-MS) metabolomics profiling. Three different twig extracts, namely, hexane (PFH), chloroform (PFC), and methanol (PFM), were submerged for their α-amylase and α-glucosidase inhibition potential in 5 replicates for each. Results obtained from the loading column scatter plot of orthogonal partial least square (OPLS) model revealed the presence of 12 bioactive compounds, namely, dl-α-tocopherol, n-hexadecanoic acid, 2-hexyl-1-decanol, stigmastanol, 2-nonadecanone, cholest-8(14)-en-3-ol, 4,4-dimethyl-, (3β,5α)-, stigmast-4-en-3-one, stigmasterol, 1-ethyl-1-tetradecyloxy-1-silacyclohexane, ɣ-sitosterol, stigmast-7-en-3-ol, (3β,5α,24S)-, and α-monostearin. In silico molecular docking was carried out using the crystal structure α-amylase (PDB ID: 4W93) and α-glucosidase (PDB ID: 3WY1). α-Amylase-n-hexadecanoic acid exhibited the lowest binding energy of -2.28 kcal/mol with two hydrogen bonds residue, namely, LYS178 and TYR174, along with hydrophobic interactions involving PRO140, TRP134, SER132, ASP135, and LYS172. The binding interactions of α-glucosidase-n-hexadecanoic acid complex ligand also showed the lowest binding energy among 5 major compounds with the energy value of -4.04 kcal/mol. The complex consists of one hydrogen bond interacting residue, ARG437, and hydrophobic interactions with ALA444, ASP141, GLN438, GLU432, GLY374, LEU373, LEU433, LYS352, PRO347, THR445, HIS348, and PRO351. The study provides informative data on the potential antidiabetic inhibitors identified in Paederia foetida twigs, indicating the plant has the therapeutic effect properties to manage diabetes.
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Wu Y, Xu J, He Y, Shi M, Han X, Li W, Zhang X, Wen X. Metabolic Profiling of Pitaya ( Hylocereus polyrhizus) during Fruit Development and Maturation. Molecules 2019; 24:E1114. [PMID: 30897852 PMCID: PMC6470951 DOI: 10.3390/molecules24061114] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/16/2019] [Accepted: 03/18/2019] [Indexed: 12/21/2022] Open
Abstract
Pitaya (Hylocereus polyrhizus) has attracted much interest from consumers as it is a novelty fruit with high nutrient content and a tolerance to drought stress. As a group of attractive pigment- and health-promoting natural compounds, betalains represent a visual feature for pitaya fruit quality. However, little information on the correlation between betalains and relevant metabolites exists so far. Currently, color (Commission International del'Eclairage, CIE) parameters, betalain contents, and untargeted metabolic profiling (gas chromatography-time-of-flight-mass spectrometry, GC⁻MS and liquid chromatography tandem mass spectrometry, LC⁻MS) have been examined on 'Zihonglong' fruits at nine different developmental stages, and the variation character of the metabolite contents was simultaneously investigated between peel and pulp. Furthermore, principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA) were used to explore metabolite profiles from the fruit samples. Our results demonstrated that the decrease of amino acid, accompanied by the increase of sugars and organic acid, might contribute to the formation of betalains. Notably, as one of four potential biomarker metabolites, citramalic acid might be related to betalain formation.
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Affiliation(s)
- Yawei Wu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region, Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang 550025, Guizhou, China.
- Institute of Pomology Science, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
| | - Juan Xu
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
| | - Yizhong He
- Citrus Research Institute, Southwest University/National Citrus Engineering Research Center, Chongqing 400712, China.
| | - Meiyan Shi
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
| | - Xiumei Han
- Institute of Pomology Science, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
| | - Wenyun Li
- Institute of Pomology Science, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
- Key Laboratory of Horticultural Plant Biology, Huazhong Agricultural University, Wuhan 430070, Hubei, China.
| | - Xingwu Zhang
- Institute of Pomology Science, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
| | - Xiaopeng Wen
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region, Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang 550025, Guizhou, China.
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Chen J, Zhang P, Lv M, Guo H, Huang Y, Zhang Z, Xu F. Influences of Normalization Method on Biomarker Discovery in Gas Chromatography-Mass Spectrometry-Based Untargeted Metabolomics: What Should Be Considered? Anal Chem 2017; 89:5342-5348. [PMID: 28402628 DOI: 10.1021/acs.analchem.6b05152] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Data reduction techniques in gas chromatography-mass spectrometry-based untargeted metabolomics has made the following workflow of data analysis more lucid. However, the normalization process still perplexes researchers, and its effects are always ignored. In order to reveal the influences of normalization method, five representative normalization methods (mass spectrometry total useful signal, median, probabilistic quotient normalization, remove unwanted variation-random, and systematic ratio normalization) were compared in three real data sets with different types. First, data reduction techniques were used to refine the original data. Then, quality control samples and relative log abundance plots were utilized to evaluate the unwanted variations and the efficiencies of normalization process. Furthermore, the potential biomarkers which were screened out by the Mann-Whitney U test, receiver operating characteristic curve analysis, random forest, and feature selection algorithm Boruta in different normalized data sets were compared. The results indicated the determination of the normalization method was difficult because the commonly accepted rules were easy to fulfill but different normalization methods had unforeseen influences on both the kind and number of potential biomarkers. Lastly, an integrated strategy for normalization method selection was recommended.
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Affiliation(s)
| | | | - Mengying Lv
- School of Pharmacy, Shihezi University , Shihezi 832002, China
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