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Calva J, Silva M, Morocho V. Composition and Anti-Acetylcholinesterase Properties of the Essential Oil of the Ecuadorian Endemic Species Eugenia valvata McVaugh. Molecules 2023; 28:8112. [PMID: 38138598 PMCID: PMC10746026 DOI: 10.3390/molecules28248112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/05/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Alzheimer's disease is a global health problem due to the scarcity of acetylcholinesterase inhibitors, the basis for symptomatic treatment of this disease; this requires new approaches to drug discovery. In this study, we investigated the chemical composition and anticholinesterase activity of Eugenia valvata McVaugt (Myrtaceae) collected in southern Ecuador, which was obtained as an essential oil (EO) with a yield of 0.124 ± 0.03% (w/w); as a result of the chemical composition analysis, a total of 58 organic compounds were identified-representing 95.91% of the total volatile compounds-using a stationary phase based on 5% phenyl-methylpolysiloxane, as analyzed via gas chromatography coupled to mass spectrometry (GC-MS) and flame ionization detection (GC-FID). The main groups were hydrocarbon sesquiterpenes (37.43%), oxygenated sesquiterpenes (31.08%), hydrocarbon monoterpenes (24.14%), oxygenated monoterpenes (0.20%), and other compounds (3.058%). Samples were characterized by the following compounds: α-pinene (22.70%), α-humulene (17.20%), (E)-caryophyllene (6.02%), citronellyl pentanoate (5.76%), 7-epi-α-eudesmol (4.34%) and 5-iso-cedranol (3.64%); this research was complemented with an enantioselective analysis carried out using 2,3-diethyl-6-tert-butyldimethylsilyl-β-cyclodextrin as a stationary phase chiral selector. As a result, α-pinene, limonene, and α-cadinene enantiomers were identified; finally, in the search for new active principles, the EO reported strong anticholinesterase activity with an IC50 of 53.08 ± 1.13 µg/mL, making it a promising candidate for future studies of Alzheimer's disease.
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Affiliation(s)
- James Calva
- Departamento de Química, Universidad Técnica Particular de Loja (UTPL), Loja 1101608, Ecuador; (M.S.); (V.M.)
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Klavins L, Almonaitytė K, Šalaševičienė A, Zommere A, Spalvis K, Vincevica-Gaile Z, Korpinen R, Klavins M. Strategy of Coniferous Needle Biorefinery into Value-Added Products to Implement Circular Bioeconomy Concepts in Forestry Side Stream Utilization. Molecules 2023; 28:7085. [PMID: 37894564 PMCID: PMC10609605 DOI: 10.3390/molecules28207085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/24/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Sustainable development goals require a reduction in the existing heavy reliance on fossil resources. Forestry can be considered a key resource for the bioeconomy, providing timber, energy, chemicals (including fine chemicals), and various other products. Besides the main product, timber, forestry generates significant amounts of different biomass side streams. Considering the unique and highly complex chemical composition of coniferous needle/greenery biomass, biorefinery strategies can be considered as prospective possibilities to address top segments of the bio-based value pyramid, addressing coniferous biomass side streams as a source of diverse chemical substances with applications as the replacement of fossil material-based chemicals, building blocks, food, and feed and applications as fine chemicals. This study reviews biorefinery methods for coniferous tree forestry biomass side streams, exploring the production of value-added products. Additionally, it discusses the potential for developing further biorefinery strategies to obtain products with enhanced value.
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Affiliation(s)
- Linards Klavins
- Department of Environmental Science, University of Latvia, Raina Blvd. 19, LV-1586 Riga, Latvia; (A.Z.); (Z.V.-G.); (M.K.)
| | - Karolina Almonaitytė
- Food Institute, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania; (K.A.); (A.Š.)
| | - Alvija Šalaševičienė
- Food Institute, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania; (K.A.); (A.Š.)
| | - Alise Zommere
- Department of Environmental Science, University of Latvia, Raina Blvd. 19, LV-1586 Riga, Latvia; (A.Z.); (Z.V.-G.); (M.K.)
| | | | - Zane Vincevica-Gaile
- Department of Environmental Science, University of Latvia, Raina Blvd. 19, LV-1586 Riga, Latvia; (A.Z.); (Z.V.-G.); (M.K.)
| | - Risto Korpinen
- Biomass Fractionation Technologies, Production Systems, Natural Resources Institute Finland, Viikinkaari 9, FI-00790 Helsinki, Finland;
| | - Maris Klavins
- Department of Environmental Science, University of Latvia, Raina Blvd. 19, LV-1586 Riga, Latvia; (A.Z.); (Z.V.-G.); (M.K.)
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Raeber J, Steuer C. Exploring new dimensions: Single and multi-block analysis of essential oils using DBDI-MS and FT-IR for enhanced authenticity control. Anal Chim Acta 2023; 1277:341657. [PMID: 37604611 DOI: 10.1016/j.aca.2023.341657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/18/2023] [Accepted: 07/24/2023] [Indexed: 08/23/2023]
Abstract
BACKGROUND Essential oils (EOs) are complex mixtures of volatile hydrocarbons with a wide range of applications in the pharmaceutical, fragrance and food industry. The composition of EOs is highly variable and can affect their quality and pharmaceutical efficacy. Moreover, the high economic value of EOs, such as those obtained from Rosa damascena, make falsification and misclassification a lucrative business. Consequently, adulterations can lead to serious health consequences for consumers. While current quality control methods for EOs involve analysing their chromatographic profile or comparing their Fourier transform infrared (FT-IR) spectra, these methods can be time-consuming or lack sensitivity. To address these issues, we compared state-of-the-art quality control methods, including gas chromatography flame ionization detection (GC-FID) quantification and enantiomeric ratio determination, FT-IR spectrometry with dielectric barrier discharge ionization coupled to triple quadrupole mass spectrometer (DBDI-MS), in a chemometric single- and multi-block approach. RESULTS Our results show that the best classification accuracy of 94.7% for R. damascena samples was obtained using GC-FID combined with partial least square discriminant analysis (PLS-DA). Comparatively, the enantiomeric ratios did not improve classification accuracy. In contrast, fragmentation data from DBDI-MS (Q3), which was acquired in a fraction of the analysis time and without extensive sample preparation, achieved a classification accuracy of 84.2%. We also found that combining FT-IR with parent ion DBDI-MS (Q1) data in a multi-block sequentially orthogonalized partial least squares linear discriminant analysis (SO-PLS-LDA) model improved classification accuracy, compared to their respective single-block PLS-DA models. SIGNIFICANCE Overall, our study demonstrates that DBDI, as an ambient ionization method, has significant potential for high-throughput screening. When combined with MS, it can produce comparable classification accuracies to conventional methods, while offering the added benefits of speed and convenience. As such, DBDI-MS is a promising tool for EO quality control.
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Affiliation(s)
- Justine Raeber
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland
| | - Christian Steuer
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland.
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Dziedziński M, Stachowiak B, Kobus-Cisowska J, Kozłowski R, Stuper-Szablewska K, Szambelan K, Górna B. Supplementation of beer with Pinus sylvestris L. shoots extracts and its effect on fermentation, phenolic content, antioxidant activity and sensory profiles. ELECTRON J BIOTECHN 2023. [DOI: 10.1016/j.ejbt.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
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Khan M, Khan M, Al-hamoud K, Adil SF, Shaik MR, Alkhathlan HZ. Diversity of Citrullus colocynthis (L.) Schrad Seeds Extracts: Detailed Chemical Profiling and Evaluation of Their Medicinal Properties. PLANTS (BASEL, SWITZERLAND) 2023; 12:567. [PMID: 36771651 PMCID: PMC9919198 DOI: 10.3390/plants12030567] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/15/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Seeds and fruits of Citrullus colocynthis have been reported to possess huge potential for the development of phytopharmaceuticals with a wide range of biological activities. Thus, in the current study, we are reporting the potential antimicrobial and anticancer properties of C. colocynthis seeds extracted with solvents of different polarities, including methanol (M.E.), hexane (H.E.), and chloroform (C.E.). Antimicrobial properties of C. colocynthis seeds extracts were evaluated on Gram-positive and Gram-negative bacteria, whereas, anticancer properties were tested on four different cell lines, including HepG2, DU145, Hela, and A549. All the extracts have demonstrated noteworthy antimicrobial activities with a minimum inhibitory concentration (MIC) ranging from 0.9-62.5 µg/mL against Klebsiella planticola and Staphylococcus aureus; meanwhile, they were found to be moderately active (MIC 62.5-250 µg/mL) against Escherichia coli and Micrococcus luteus strains. Hexane extracts have demonstrated the highest antimicrobial activity against K. planticola with an MIC value of 0.9 µg/mL, equivalent to that of the standard drug ciprofloxacin used as positive control in this study. For anticancer activity, all the extracts of C. colocynthis seeds were found to be active against all the tested cell lines (IC50 48.49-197.96 µg/mL) except for the chloroform extracts, which were found to be inactive against the HepG2 cell line. The hexane extract was found to possess the most prominent anticancer activity when compared to other extracts and has demonstrated the highest anticancer activity against the DU145 cell line with an IC50 value of 48.49 µg/mL. Furthermore, a detailed phytoconstituents analysis of all the extracts of C. colocynthis seeds were performed using GC-MS and GC-FID techniques. Altogether, 43 phytoconstituents were identified from the extracts of C. colocynthis seeds, among which 21, 12, and 16 components were identified from the H.E., C.E., and M.E. extracts, respectively. Monoterpenes (40.4%) and oxygenated monoterpenes (41.1%) were the most dominating chemical class of compounds from the hexane and chloroform extracts, respectively; whereas, in the methanolic extract, oxygenated aliphatic hydrocarbons (77.2%) were found to be the most dominating chemical class of compounds. To the best of our knowledge, all the phytoconstituents identified in this study are being reported for the first time from the C. colocynthis.
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Chen M, Qiao Y, Quan X, Shi H, Duan Z. Physiological, biochemical and phytohormone responses of Elymus nutans to α-pinene-induced allelopathy. PeerJ 2022; 10:e14100. [PMID: 36196396 PMCID: PMC9527024 DOI: 10.7717/peerj.14100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 09/01/2022] [Indexed: 01/21/2023] Open
Abstract
The α-pinene is the main allelochemical of many weeds that inhibit the growth of Elymus nutans, an important forage and ecological restoration herbage. However, the response changes of α-pinene-induced allelopathy to E. nutans is still unclear. Here, we investigated the physiological, biochemical and phytohormone changes of E. nutans exposed to different α-pinene concentrations. The α-pinene-stress had no significant effect on height and fresh weight (FW) of seedlings. The water-soluble proteins, the soluble sugars and proline (Pro) strengthened seedlings immunity at 5 and 10 µL L-1 α-pinene. Superoxide dismutase (SOD) and ascorbate peroxidase (APX) increased at 5 µL L-1 α-pinene to resist stress. APX reduced the membrane lipid peroxidation quickly at 10 µL L-1 α-pinene. The high-activity of peroxidase (POD), APX along with the high level of GSH contributed to the cellular redox equilibrium at 15 µL L-1 α-pinene. The POD, glutathione reductase (GR) activity and glutathione (GSH) level remained stable at 20 µL L-1 α-pinene. The changes in antioxidant enzymes and antioxidants indicated that E. nutans was effective in counteracting the harmful effects generated by hydrogen peroxide (H2O2). The α-pinene caused severe phytotoxic effects in E. nutans seedlings at 15 and 20 µL L-1. Endogenous signal nitric oxide (NO) and cell membrane damage product Pro accumulated in leaves of E. nutans seedlings at 15 and 20 µL L-1 α-pinene, while lipid peroxidation product malondialdehyde (MDA) accumulated. The chlorophylls (Chls), chlorophyll a (Chl a), chlorophyll b (Chl b) content decreased, and biomass of seedlings was severely inhibited at 20 µL L-1 α-pinene. The α-pinene caused phytotoxic effects on E. nutans seedlings mainly through breaking the balance of the membrane system rather than with reactive oxygen species (ROS) productionat 15 and 20 µL L-1 α-pinene. Additionally, phytohormone levels were altered by α-pinene-stress. Abscisic acid (ABA) and indole acetic acid (IAA) of E. nutans seedlings were sensitive to α-pinene. As for the degree of α-pinene stress, salicylic acid (SA) and jasmonic acid (JA) played an important role in resisting allelopathic effects at 15 µL L-1 α-pinene. The ABA, Zeatin, SA, gibberellin 7 (GA7), JA and IAA levels increased at 20 µL L-1 α-pinene. The α-pinene had a greatest impact on ABA and IAA levels. Collectively, our results suggest that E. nutans seedlings were effective in counteracting the harmful effects at 5 and 10 µL L-1 α-pinene, and they were severely stressed at 15 and 20 µL L-1 α-pinene. Our findings provided references for understanding the allelopathic mechanism about allelochemicals to plants.
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Affiliation(s)
- Mengci Chen
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Youming Qiao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Xiaolong Quan
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Huilan Shi
- College of Ecol-Environmental Engineering, Qinghai University, Xining, Qinghai, China
| | - Zhonghua Duan
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
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Csikós E, Csekő K, Kemény Á, Draskóczi L, Kereskai L, Kocsis B, Böszörményi A, Helyes Z, Horváth G. Pinus sylvestris L. and Syzygium aromaticum (L.) Merr. & L. M. Perry Essential Oils Inhibit Endotoxin-Induced Airway Hyperreactivity despite Aggravated Inflammatory Mechanisms in Mice. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123868. [PMID: 35744988 PMCID: PMC9229653 DOI: 10.3390/molecules27123868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/10/2022] [Accepted: 06/11/2022] [Indexed: 11/16/2022]
Abstract
Scots pine (SO) and clove (CO) essential oils (EOs) are commonly used by inhalation, and their main components are shown to reduce inflammatory mediator production. The aim of our research was to investigate the chemical composition of commercially available SO and CO by gas chromatography–mass spectrometry and study their effects on airway functions and inflammation in an acute pneumonitis mouse model. Inflammation was evoked by intratracheal endotoxin and EOs were inhaled three times during the 24 h experimental period. Respiratory function was analyzed by unrestrained whole-body plethysmography, lung inflammation by semiquantitative histopathological scoring, myeloperoxidase (MPO) activity and cytokine measurements. α-Pinene (39.4%) was the main component in SO, and eugenol (88.6%) in CO. Both SO and CO significantly reduced airway hyperresponsiveness, and prevented peak expiratory flow, tidal volume increases and perivascular edema formation. Meanwhile, inflammatory cell infiltration was not remarkably affected. In contrast, MPO activity and several inflammatory cytokines (IL-1β, KC, MCP-1, MIP-2, TNF-α) were aggravated by both EOs. This is the first evidence that SO and CO inhalation improve airway function, but enhance certain inflammatory parameters. These results suggest that these EOs should be used with caution in cases of inflammation-associated respiratory diseases.
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Affiliation(s)
- Eszter Csikós
- Department of Pharmacognosy, Faculty of Pharmacy, University of Pecs, H-7624 Pecs, Hungary;
| | - Kata Csekő
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, H-7624 Pecs, Hungary; (K.C.); (Á.K.); (L.D.); (Z.H.)
- Szentágothai Research Centre, University of Pecs, H-7624 Pecs, Hungary
| | - Ágnes Kemény
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, H-7624 Pecs, Hungary; (K.C.); (Á.K.); (L.D.); (Z.H.)
- Szentágothai Research Centre, University of Pecs, H-7624 Pecs, Hungary
- Department of Medical Biology and Central Electron Microscope Laboratory, Medical School, University of Pecs, H-7624 Pecs, Hungary
| | - Lilla Draskóczi
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, H-7624 Pecs, Hungary; (K.C.); (Á.K.); (L.D.); (Z.H.)
- Szentágothai Research Centre, University of Pecs, H-7624 Pecs, Hungary
| | - László Kereskai
- Department of Pathology, Medical School, University of Pecs, H-7624 Pecs, Hungary;
| | - Béla Kocsis
- Department of Medical Microbiology and Immunology, Medical School, University of Pecs, H-7624 Pecs, Hungary;
| | - Andrea Böszörményi
- Institute of Pharmacognosy, Faculty of Pharmacy, Semmelweis University, H-1085 Budapest, Hungary;
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pecs, H-7624 Pecs, Hungary; (K.C.); (Á.K.); (L.D.); (Z.H.)
- Szentágothai Research Centre, University of Pecs, H-7624 Pecs, Hungary
- PharmInVivo Ltd., H-7629 Pecs, Hungary
| | - Györgyi Horváth
- Department of Pharmacognosy, Faculty of Pharmacy, University of Pecs, H-7624 Pecs, Hungary;
- Correspondence: ; Tel.: +36-72-503650-28823
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Prediction and Comparisons of Turpentine Content in Slash Pine at Different Slope Positions Using Near-Infrared Spectroscopy. PLANTS 2022; 11:plants11070914. [PMID: 35406894 PMCID: PMC9003541 DOI: 10.3390/plants11070914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 03/24/2022] [Accepted: 03/28/2022] [Indexed: 11/29/2022]
Abstract
Pine resin is one of the best known and most exploited non-wood products. Resin is a complex mixture of terpenes produced by specialized cells that are dedicated to tree defense. Chemical defenses are plastic properties, and concentrations of chemical defenses can be adjusted based on environmental factors, such as resource availability. The slope orientation (south/sunny or north/shady) and the altitude of the plantation site have significant effects on the soil nutrient and the plant performance, whereas little is known about how the slope affects the pine resin yield and its components. In total, 1180 slash pines in 18 plots at different slope positions were established to determine the effects on the α- and β-pinene content and resin production of the slash pine. The near-infrared spectroscopy (NIR) technique was developed to rapidly and economically predict the turpentine content for each sample. The results showed that the best partial least squares regression (PLS) models for α- and β-pinene content prediction were established via the combined treatment of multiplicative scatter correction–significant multivariate correlation (MSC–sMC). The prediction models based on sMC spectra for α- and β-pinene content have an R2 of 0.82 and 0.85 and an RMSE of 0.96 and 0.82, respectively, and they were successfully implemented in turpentine prediction in this research. The results also showed that a barren slope position (especially mid-slope) could improve the α-pinene and β-pinene content and resin productivity of slash pine, and the β-pinene content in the resin had more variances in this research.
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Allenspach M, Steuer C. α-Pinene: A never-ending story. PHYTOCHEMISTRY 2021; 190:112857. [PMID: 34365295 DOI: 10.1016/j.phytochem.2021.112857] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/10/2021] [Accepted: 06/25/2021] [Indexed: 05/12/2023]
Abstract
α-Pinene represents a member of the monoterpene class and is highly distributed in higher plants like conifers, Juniper ssp. and Cannabis ssp. α-Pinene has been used to treat respiratory tract infections for centuries. Furthermore, it plays a crucial role in the fragrance and flavor industry. In vitro assays have shown an enantioselective profile of (+)- and (-)-α-pinene for antibacterial and insecticidal activity, respectively. Recent research has used pre-validated biological structures to synthesize new chemical entities with pharmacological and herbicidal activities. In summary, this review focuses on recent literature covering synthetic pathways of flavor compounds and scaffold hopping based on the α-pinene core domaine, as well as the (enantioselective) activities of α-pinene. Recent approaches for authenticity control of essential oils based on their enantiomeric profile are also presented.
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Affiliation(s)
- Martina Allenspach
- Institute of Pharmaceutical Sciences, ETH Zürich, 8092, Zürich, Switzerland
| | - Christian Steuer
- Institute of Pharmaceutical Sciences, ETH Zürich, 8092, Zürich, Switzerland.
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Allenspach M, Valder C, Flamm D, Steuer C. Authenticity control of pine sylvestris essential oil by chiral gas chromatographic analysis of α-pinene. Sci Rep 2021; 11:16923. [PMID: 34413399 PMCID: PMC8376981 DOI: 10.1038/s41598-021-96356-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/30/2021] [Indexed: 11/28/2022] Open
Abstract
Numerous terpenes present in essential oils (EOs) display one or more chiral centers. Within the same genus the enantiomeric ratio of these compounds can be different. Thus, the determination of enantiomers is a valuable tool to evaluate authenticity and quality of EOs. In here, the terpene profile of primary and commercial pine EOs was analyzed by conventional and chiral gas chromatography coupled to a flame ionization detector. The enantiomeric excess of ( ±)-α-pinene was determined and significant differences between primary and commercially available EOs were observed. Primary EOs of Pinus sylvestris L. showed a positive enantiomeric excess of (+)-α-pinene whereas commercial EOs labeled as P. sylvestris L. exhibited an enantiomeric excess of (−)-α-pinene. Thus, chiral analysis provides useful information on the authenticity of pine EOs and allows to uncover possible mislabeling, the use of the wrong herbal substance and sources of adulteration in pine oil.
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Affiliation(s)
- Martina Allenspach
- Institute of Pharmaceutical Sciences, ETH Zürich, 8092, Zurich, Switzerland
| | - Claudia Valder
- Systema Natura GmbH, Konrad-Zuse-Ring 8, 24220, Flintbek, Germany
| | - Daniela Flamm
- Systema Natura GmbH, Konrad-Zuse-Ring 8, 24220, Flintbek, Germany
| | - Christian Steuer
- Institute of Pharmaceutical Sciences, ETH Zürich, 8092, Zurich, Switzerland.
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Gimenes L, Silva JCRL, Facanali R, Hantao LW, Siqueira WJ, Marques MOM. Essential Oils of New Lippia alba Genotypes Analyzed by Flow-Modulated Comprehensive Two-Dimensional Gas Chromatography (GC×GC) and Chemometric Analysis. Molecules 2021; 26:2332. [PMID: 33923848 PMCID: PMC8073019 DOI: 10.3390/molecules26082332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/09/2021] [Accepted: 04/14/2021] [Indexed: 12/04/2022] Open
Abstract
Lippia alba (Mill.) N. E. Br. (Verbenaceae) is an aromatic shrub whose essential oils have stood out as a promising source for application in several industrial fields. In this study, the essential oils chemical characterization of eight new L. alba genotypes was performed. The selected materials were collected from the Active Germplasm Bank of the Agronomic Institute and the essential oils were extracted by hydrodistillation. Flow-modulated comprehensive two-dimensional gas chromatography coupled to mass spectrometry (GC×GC-MS) was employed for chemical characterization and evaluation of possible co-eluted compounds. In addition, the chemical analyses were submitted to multivariate statistical analyses. From this investigation, 73 metabolites were identified in the essential oils of the genotypes, from which α-pinene, β-myrcene, 1,8-cineole, linalool, neral, geranial, and caryophyllene oxide were the most abundant compounds among the accessions. This is the first report disclosing α-pinene in higher amounts in L. alba (19.69%). In addition, sabinene, trans-verbenol, myrtenol, (E)-caryophyllene, α-guaiene, germacrene D, and α-bulnesene were also found in relevant quantities in some of the genotypes, and myrtenal and myrtenol could be well separated through the second dimension. Such results contributed to the understanding of the chemical composition of those new genotypes, being important to drive a future industrial applicability and studies in genetic breeding.
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Affiliation(s)
- Leila Gimenes
- Vegetable Genetic Resources Center, Agronomic Institute, Campinas 13075-630, Brazil; (J.C.R.L.S.); (W.J.S.)
| | - Júlio César R. Lopes Silva
- Vegetable Genetic Resources Center, Agronomic Institute, Campinas 13075-630, Brazil; (J.C.R.L.S.); (W.J.S.)
- School of Agriculture, São Paulo State University (Unesp), Botucatu 18610-034, Brazil
| | - Roselaine Facanali
- Institute of Chemistry, University of Campinas (Unicamp), Campinas 13083-970, Brazil; (R.F.); (L.W.H.)
| | - Leandro Wang Hantao
- Institute of Chemistry, University of Campinas (Unicamp), Campinas 13083-970, Brazil; (R.F.); (L.W.H.)
| | - Walter José Siqueira
- Vegetable Genetic Resources Center, Agronomic Institute, Campinas 13075-630, Brazil; (J.C.R.L.S.); (W.J.S.)
| | - Marcia Ortiz Mayo Marques
- Vegetable Genetic Resources Center, Agronomic Institute, Campinas 13075-630, Brazil; (J.C.R.L.S.); (W.J.S.)
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Lebanov L, Ghiasvand A, Paull B. Data handling and data analysis in metabolomic studies of essential oils using GC-MS. J Chromatogr A 2021; 1640:461896. [PMID: 33548825 DOI: 10.1016/j.chroma.2021.461896] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/08/2021] [Indexed: 12/26/2022]
Abstract
Gas chromatography electron impact ionization mass spectrometry (GC-EI-MS) has been, and remains, the most widely applied analytical technique for metabolomic studies of essential oils. GC-EI-MS analysis of complex samples, such as essential oils, creates a large volume of data. Creating predictive models for such samples and observing patterns within complex data sets presents a significant challenge and requires application of robust data handling and data analysis methods. Accordingly, a wide variety of software and algorithms has been investigated and developed for this purpose over the years. This review provides an overview and summary of that research effort, and attempts to classify and compare different data handling and data analysis procedures that have been reported to-date in the metabolomic study of essential oils using GC-EI-MS.
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Affiliation(s)
- Leo Lebanov
- Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia; ARC Industrial Transformation Research Hub for Processing Advanced Lignocellulosics (PALS), School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia.
| | - Alireza Ghiasvand
- Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia.
| | - Brett Paull
- Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia; ARC Industrial Transformation Research Hub for Processing Advanced Lignocellulosics (PALS), School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia.
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