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Spreng S, Dawid C, Dunkel A, Hofmann T. Quantitation of Key Antioxidants and Their Contribution to the Oxidative Stability of Beer. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:16423-16437. [PMID: 39010731 PMCID: PMC11273605 DOI: 10.1021/acs.jafc.4c01000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/22/2024] [Accepted: 05/22/2024] [Indexed: 07/17/2024]
Abstract
A sensitive high-performance liquid chromatography-triple quadrupole mass spectrometry (HPLC-MS/MSMRM) method, leveraging both technique and internal calibration, was developed for the simultaneous and comprehensive quantitative analysis of 46 antioxidants and antioxidant precursors in different beer types without any cleanup procedure. Combined with their in vitro antioxidant activity, a dose-activity estimation exposed a group of 10 key antioxidants, namely, tryptophan, tyrosine, hordatine A, hordatine B, procyanidin B3, prodelphinidin B3, tachioside (3-methoxy-4-hydroxyphenyl-β-d-glucopyranoside), (+)-catechin, tyrosol, and ferulic acid. To study the effect of antioxidants in spiking and aging studies, another liquid chromatography-MS (LC-MS)-based method was developed, monitoring markers for oxidation in beer. A positive effect of the antioxidants on the flavor stability at naturally relevant concentrations was shown by a slowing of oxygen-dependent aging reactions highlighted in beer storage trials under oxygen atmosphere. Thereby, a doubling of the natural concentration of all investigated antioxidants in beer revealed a limit inhibition of 67% on the degradation of cis-isocohumulone to hydroxy-cis-alloisocohumulone.
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Affiliation(s)
- Stefan Spreng
- Chair
of Food Chemistry and Molecular and Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, D-85354 Freising, Germany
| | - Corinna Dawid
- Chair
of Food Chemistry and Molecular and Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, D-85354 Freising, Germany
- Bavarian
Center for Biomolecular Mass Spectrometry, Gregor-Mendel-Straße 4, D-85354 Freising, Germany
| | - Andreas Dunkel
- Leibniz-Institute
for Food Systems Biology at the Technical University of Munich, Lise-Meitner Str. 34, D-85354 Freising, Germany
| | - Thomas Hofmann
- Chair
of Food Chemistry and Molecular and Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, D-85354 Freising, Germany
- Bavarian
Center for Biomolecular Mass Spectrometry, Gregor-Mendel-Straße 4, D-85354 Freising, Germany
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2
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Spreng S, Wannenmacher J, Gastl M, Dawid C, Hofmann T. Quantitative Antioxidant Profiling Throughout Beer Brewing Followed by Discovery and Isolation of Precursors from Barley ( Hordeum vulgare L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:13885-13897. [PMID: 38833300 PMCID: PMC11191689 DOI: 10.1021/acs.jafc.4c00998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/22/2024] [Accepted: 05/22/2024] [Indexed: 06/06/2024]
Abstract
The application of high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS) revealed the origin and evolution of antioxidants during the brewing process of hopped and unhopped reference beer. As tachioside (3-methoxy-4-hydroxyphenyl-β-d-glucopyranoside), arbutin (4-hydroxyphenyl-β-d-glucopyranoside), and hordatines clearly increased during the fermentation step, the raw material barley was investigated as a source of the corresponding precursors. Therefore, 4-hydroxyphenyl-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranoside, 4-hydroxy-3-methoxyphenyl-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranoside, 4-hydroxy-3-methoxyphenyl-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranoside, and 4-hydroxy-2-methoxyphenyl-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranoside were isolated from barley for the first time, and identified using liquid chromatography-mass spectrometry (LC-MS) and one-dimensional/two-dimensional-nuclear magnetic resonance (1D/2D-NMR) experiments. Moreover, hordatine glucosides A, B, and C were isolated and identified from barley, and hordatine C glucoside was characterized for the first time. A fermentation model followed by HPLC-MS/MS analysis substantiated the release of tachioside from 4-hydroxy-3-methoxyphenyl-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranoside by Saccharomyces cerevisiae. Quantitation experiments monitoring the content in wheat, barley, and different barley malt types demonstrated a wide range of concentrations, providing a basis for further comprehensive investigations to optimize the antioxidant yield in beer to contribute to improved flavor stability.
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Affiliation(s)
- Stefan Spreng
- Chair
of Food Chemistry and Molecular and Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, D-85354 Freising, Germany
| | - Julia Wannenmacher
- Chair
of Brewing and Beverage Technology, Technical
University of Munich, Weihenstephaner Steig 20, D-85354 Freising, Germany
| | - Martina Gastl
- Chair
of Brewing and Beverage Technology, Technical
University of Munich, Weihenstephaner Steig 20, D-85354 Freising, Germany
| | - Corinna Dawid
- Chair
of Food Chemistry and Molecular and Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, D-85354 Freising, Germany
- Bavarian
Center for Biomolecular Mass Spectrometry, Gregor-Mendel-Straße 4, D-85354 Freising, Germany
| | - Thomas Hofmann
- Chair
of Food Chemistry and Molecular and Sensory Science, Technical University of Munich, Lise-Meitner-Str. 34, D-85354 Freising, Germany
- Bavarian
Center for Biomolecular Mass Spectrometry, Gregor-Mendel-Straße 4, D-85354 Freising, Germany
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3
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Teng CE, Wang YM, Li TH, Chen SF. Quantification of Hop-Derived Bitter Compounds in Beer Using Liquid Chromatography Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:746-755. [PMID: 38422384 DOI: 10.1021/jasms.3c00439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Hops (Humulus lupulus L.) are essential raw materials for beer brewing, and the major contributors to beer bitterness are isohumulones (iso-α-acids) and humulinones. In recent years, many breweries have focused on the production of hop-forward beer styles by adding hops after or during the cold fermentation stage, which will tend to release humulinones or other hop-derived bitter compounds. In this study, a LC-MS/MS method was developed for quantification of 60 hop-derived bitter compounds in 25 min. Reverse-phase chromatography with an alkaline methanol/acetonitrile (70:30) mobile phase was used for the separation. The quantitative range was 0.053-3912 ng/mL with correlation coefficient r > 0.99, and the LOQ were 0.26 and 0.053 ng/mL for iso-α-acids and humulinones. Precision (RSD < 5.0%) and accuracy (recovery 86.3%-118.1%) were both satisfactory. The abundance of hop-derived bitter compounds in the dry-hopped beer (Double-India Pale Ale) and the nondry-hopped beer (Vienna Lager) were monitored throughout the fermentation and storage stages, and the formation of oxidation and cyclization products showed difference profiles between these two beers. The quantification results reveal how hop-derived bitter compounds change throughout the brewing process, as well as the influence of hops and brewing techniques on beer bitterness.
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Affiliation(s)
- Chieh-En Teng
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Yu-Meng Wang
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Tai-Huan Li
- Zhangmen Brewing Company, New Taipei City 22161, Taiwan
| | - Sung-Fang Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
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4
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Vrzal T, Slabý M, Kubizniaková P, Horák T, Olšovská J. Sensomic comparison of lager beers fermented by selected Saccharomyces pastorianus yeast strains. Food Microbiol 2023; 115:104321. [PMID: 37567631 DOI: 10.1016/j.fm.2023.104321] [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: 01/02/2023] [Revised: 04/20/2023] [Accepted: 06/10/2023] [Indexed: 08/13/2023]
Abstract
Selection of the appropriate yeast strain is one of the most crucial steps in a brewery. Traditionally, yeast strain's abilities during beer fermentation are described according to brewer's experiences. Hence, these descriptions could be inaccurate and strictly based on sensory experiences. In this study, lager beers fermented by four traditional bottom-fermented yeast strains were characterized in detail by sensomic approach. The obtained results revealed that yeast strains can influence most of the sensory-related components in beer, not only esters and higher alcohols, but also carbonyls, amino acids, saccharides, fatty acids, heterocyclic compounds, hop oils, and other hop-related components. By comparison of chemical and sensory characteristics of each studied beer, the theoretical importance of sensory interactions on beer flavor perception was also revealed as the general conception that the beers with similar flavors have also similar chemical profiles (and vice versa) was seemed as not valid.
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Affiliation(s)
- Tomáš Vrzal
- Research Institute of Brewing and Malting, Lípová 511/15, 120 00, Prague, Czech Republic.
| | - Martin Slabý
- Research Institute of Brewing and Malting, Lípová 511/15, 120 00, Prague, Czech Republic
| | - Petra Kubizniaková
- Research Institute of Brewing and Malting, Lípová 511/15, 120 00, Prague, Czech Republic
| | - Tomáš Horák
- Research Institute of Brewing and Malting, Lípová 511/15, 120 00, Prague, Czech Republic
| | - Jana Olšovská
- Research Institute of Brewing and Malting, Lípová 511/15, 120 00, Prague, Czech Republic
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5
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El-Desoky AH, Asano T, Maeyama Y, Kato H, Hitora Y, Goto E, Kotani S, Nakajima M, Tsukamoto S. Arteperoxides A-C, tris-normonoterpene-sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity. PHYTOCHEMISTRY 2023; 206:113548. [PMID: 36481317 DOI: 10.1016/j.phytochem.2022.113548] [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: 09/27/2022] [Revised: 11/24/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Antiosteoclastogenic-guided screening was conducted with 120 extracts of the medicinal plants collected in Egypt that led to the selection of Artemisia judaica L. (Asteraceae). Three undescribed davanone-related terpenoids, arteperoxides A-C, were isolated from the extract with two known derivatives, hydroxydavanone and davana acid. Structural analysis revealed that arteperoxides A-C were tris-normonoterpene-sesquiterpene conjugates with peroxide bridges. Although davanone derivatives with peroxides, such as a hydroperoxyl and peroxyhemiketal groups, have been isolated from Artemisia species, arteperoxides A-C are the first variations observed to contain peroxide bridges between two terpene-derived units. The absolute configurations of arteperoxides A and B were studied based on their spectroscopic data compared with those of the semisynthetic analogs that have ether linkages. The natural and synthetic compounds were tested for the antiosteoclastogenic activity, and arteperoxide C and hydroxydavanone were more potent than other compounds at 20 μM.
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Affiliation(s)
- Ahmed H El-Desoky
- Department of Natural Medicines, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan; Pharmaceutical and Drug Industries Research Institute, Pharmacognosy Department, National Research Centre, El-Tahrir St., Dokki, Giza, 12622, Egypt
| | - Toshifumi Asano
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi Chuo-ku, Kumamoto, 862-0973, Japan
| | - Yuka Maeyama
- Department of Natural Medicines, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Hikaru Kato
- Department of Natural Medicines, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Yuki Hitora
- Department of Natural Medicines, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Eishu Goto
- Department of Natural Medicines, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Shunsuke Kotani
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi Chuo-ku, Kumamoto, 862-0973, Japan
| | - Makoto Nakajima
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi Chuo-ku, Kumamoto, 862-0973, Japan
| | - Sachiko Tsukamoto
- Department of Natural Medicines, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan.
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6
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Archeochemistry reveals the first steps into modern industrial brewing. Sci Rep 2022; 12:9251. [PMID: 35661112 PMCID: PMC9166709 DOI: 10.1038/s41598-022-12943-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022] Open
Abstract
A historical beer, dated to the German Empire era, was recently found in northern Germany. Its chemical composition represents a unique source of insights into brewing culture of the late nineteenth century when pioneer innovations laid the foundations for industrial brewing. Complementary analytics including metabolomics, microbiological, sensory, and beer attribute analysis revealed its molecular profile and certify the unprecedented good storage condition even after 130 years in the bottle. Comparing its chemical signature to that of four hundred modern brews allowed to describe molecular fingerprints teaching us about technological aspects of historical beer brewing. Several critical production steps such as malting and germ treatment, wort preparation and fermentation, filtration and storage, and compliance with the Bavarian Purity Law left detectable molecular imprints. In addition, the aging process of the drinkable brew could be analyzed on a chemical level and resulted in an unseen diversity of hops- and Maillard-derived compounds. Using this archeochemical forensic approach, the historical production process of a culturally significant beverage could be traced and the ravages of time made visible.
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7
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Castro R, Díaz AB, Durán-Guerrero E, Lasanta C. Influence of different fermentation conditions on the analytical and sensory properties of craft beers: Hopping, fermentation temperature and yeast strain. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2021.104278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Abstract
Beer production has over a thousand-year tradition, but its development in the present continues with the introduction of new technological and technical solutions. The methods for modeling and optimization in beer production through an applied analytical approach have been discussed in the present paper. For this purpose, the parameters that are essential for the main processes in beer production have been considered—development of malt blends, guaranteeing the main brewing characteristics; obtaining wort through the processes of mashing, lautering and boiling of wort; fermentation and maturation of beer. Data on the mathematical dependences used to describe the different stages of beer production (one-factor experiments, modeling of mixtures, experiment planning, description of the kinetics of microbial growth, etc.) and their limits have been presented, and specific research results of various authors teams working in this field have been cited. The independent variables as well as the objective functions for each stage have been defined. Some new trends in the field of beer production have been considered and possible approaches for their modeling and optimization have been highlighted. The paper suggests a generalized approach to describe the main methods of modeling and optimization, which does not depend on the beer type produced. The proposed approaches can be used to model and optimize the production of different beer types, and the conditions for their application should be consistent with the technological regimes used in each case. The approaches for modeling and optimization of the individual processes have been supported by mathematical dependencies most typical for these stages. Depending on the specific regimes and objectives of the study, these dependencies can be adapted and/or combined into more general mathematical models. Some new trends in the field of beer production have been considered and possible approaches for their modeling and optimization have been highlighted.
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9
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Vrzal T, Drábková K, Štěrba K, Olšovská J. Pilot sensomic study revealing the potential of amino acids to highly influence sensory properties of a lager beer. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.104028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Abstract
The acceptance of beer among consumers is most influenced by the taste and aroma. Polyphenols are widely responsible for both. Whereas polyphenols do not always result in a positive flavor and taste, they can surely impart certain off-flavors, which will be mentioned in this paper. However, the aftertaste is an important component of the beer-tasting experience and acceptance. The aftertaste, including astringency, may largely influence consumers’ consumption preference and behavior. Bitterness is one of the main, desirable characteristics of beer, but to an untrained consumer, it can often be mistaken with astringency. This review aims to describe the differences between these two properties. Both attributes derive from the same beer components, polyphenols from barley and hop, but there is a distinctive difference between them. To understand the complexity of bitterness and astringency, polyphenols behavior, characteristics, and stability during the brewing process are also described in this review.
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11
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Redox and Anti-Inflammatory Properties from Hop Components in Beer-Related to Neuroprotection. Nutrients 2021; 13:nu13062000. [PMID: 34200665 PMCID: PMC8226943 DOI: 10.3390/nu13062000] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/31/2021] [Accepted: 06/07/2021] [Indexed: 12/13/2022] Open
Abstract
Beer is a fermented beverage widely consumed worldwide with high nutritional and biological value due to its bioactive components. It has been described that both alcoholic and non-alcoholic beer have several nutrients derived from their ingredients including vitamins, minerals, proteins, carbohydrates, and antioxidants that make beer a potential functional supplement. Some of these compounds possess redox, anti-inflammatory and anticarcinogenic properties making the benefits of moderate beer consumption an attractive way to improve human health. Specifically, the hop cones used for beer brewing provide essential oils, bitter acids and flavonoids that are potent antioxidants and immune response modulators. This review focuses on the redox and anti-inflammatory properties of hop derivatives and summarizes the current knowledge of their neuroprotective effects.
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12
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Application of UHPLC-Q/TOF-MS-based metabolomics analysis for the evaluation of bitter-tasting Krausen metabolites during beer fermentation. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Zhang G, Zhang N, Yang A, Huang J, Ren X, Xian M, Zou H. Hop bitter acids: resources, biosynthesis, and applications. Appl Microbiol Biotechnol 2021; 105:4343-4356. [PMID: 34021813 DOI: 10.1007/s00253-021-11329-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 01/15/2023]
Abstract
Diversified members of hop bitter acids (α- and β-acids) have been found in hop (Humulus lupulus). Mixtures of hop bitter acids have been traditionally applied in brewing and food industries as bitterness flavors or food additives. Recent studies have discovered novel applications of hop bitter acids and their derivatives in medicinal and pharmaceutical fields. The increasing demands of purified hop bitter acid promoted biosynthesis efforts for the heterologous biosynthesis of objective hop bitter acids by engineered microbial factories. In this study, the updated information of hop bitter acids and their representative application in brewing, food, and medicine fields are reviewed. We also speculate future trends on the development of robust microbial cell factories and biotechnologies for the biosynthesis of hop bitter acids. KEY POINTS: • Structures and applications of hop bitter acids are summarized in this study. • Biosynthesis of hop bitter acids remains challenging. • We discuss potential strategies in the microbial production of hop bitter acids.
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Affiliation(s)
- Guoqing Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Nan Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Anran Yang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Jingling Huang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Xueni Ren
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Mo Xian
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Huibin Zou
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. .,CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.
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14
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Pieczonka SA, Hemmler D, Moritz F, Lucio M, Zarnkow M, Jacob F, Rychlik M, Schmitt-Kopplin P. Hidden in its color: A molecular-level analysis of the beer's Maillard reaction network. Food Chem 2021; 361:130112. [PMID: 34029904 DOI: 10.1016/j.foodchem.2021.130112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/07/2021] [Accepted: 05/12/2021] [Indexed: 01/07/2023]
Abstract
We here report a comprehensive non-targeted analytical approach to describe the Maillard reaction in beer. By Fourier-transform ion cyclotron mass spectrometry (FT-ICR-MS), we were able to assign thousands of unambiguous molecular formulae to the mass signals and thus directly proceed to the compositional space of 250 analyzed beer samples. Statistical data analyses of the annotated compositions showed that the Maillard reaction is one of the driving forces of beer's molecular diversity leading to key compositional changes in the beer metabolome. Different visualization methods allowed us to map the systematic nature of Maillard reaction derived compounds. The typical molecular pattern, validated by an experimental Maillard reaction model system, pervades over 2,800 (40%) of the resolved small molecules. The major compositional changes were investigated by mass difference network analysis. We were able to reveal general reaction sequences that could be assigned to successive Maillard intermediate phase reactions by shortest path analysis.
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Affiliation(s)
- Stefan A Pieczonka
- Chair of Analytical Food Chemistry, Technical University of Munich, Maximus-von-Imhof Forum 2, 85354 Freising, Germany; Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Ingolstaedter Landstraße 1, 85764 Neuherberg, Germany
| | - Daniel Hemmler
- Chair of Analytical Food Chemistry, Technical University of Munich, Maximus-von-Imhof Forum 2, 85354 Freising, Germany; Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Ingolstaedter Landstraße 1, 85764 Neuherberg, Germany
| | - Franco Moritz
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Ingolstaedter Landstraße 1, 85764 Neuherberg, Germany
| | - Marianna Lucio
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Ingolstaedter Landstraße 1, 85764 Neuherberg, Germany
| | - Martin Zarnkow
- Research Center Weihenstephan for Brewing and Food Quality, Technical University of Munich, Alte Akademie 3, 85354 Freising, Germany
| | - Fritz Jacob
- Research Center Weihenstephan for Brewing and Food Quality, Technical University of Munich, Alte Akademie 3, 85354 Freising, Germany
| | - Michael Rychlik
- Chair of Analytical Food Chemistry, Technical University of Munich, Maximus-von-Imhof Forum 2, 85354 Freising, Germany
| | - Philippe Schmitt-Kopplin
- Chair of Analytical Food Chemistry, Technical University of Munich, Maximus-von-Imhof Forum 2, 85354 Freising, Germany; Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, Ingolstaedter Landstraße 1, 85764 Neuherberg, Germany.
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15
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Kishimoto T, Teramoto S, Fujita A, Yamada O. Evaluation of Components Contributing to the International Bitterness Unit of Wort and Beer. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2021. [DOI: 10.1080/03610470.2021.1878684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Toru Kishimoto
- National Research Institute of Brewing, Hiroshima, Japan
| | | | - Akiko Fujita
- National Research Institute of Brewing, Hiroshima, Japan
| | - Osamu Yamada
- National Research Institute of Brewing, Hiroshima, Japan
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16
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Dunkel A, Hofmann T, Di Pizio A. In Silico Investigation of Bitter Hop-Derived Compounds and Their Cognate Bitter Taste Receptors. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:10414-10423. [PMID: 32027492 DOI: 10.1021/acs.jafc.9b07863] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The typical bitter taste of beer is caused by adding hops (Humulus lupulus L.) during the wort boiling process. The bitter taste of hop-derived compounds was found to be mediated by three bitter taste receptors: TAS2R1, TAS2R14, and TAS2R40. In this work, structural bioinformatics analyses were used to characterize the binding modes of trans-isocohumulone, trans-isohumulone, trans-isoadhumulone, cis-isocohumulone, cis-isohumulone, cis-isoadhumulone, cohumulone, humulone, adhumulone, and 8-prenylnaringenin into the orthosteric binding site of their cognate receptors. A conserved asparagine in transmembrane 3 was found to be essential for the recognition of hop-derived compounds, whereas the surrounding residues in the binding site of the three receptors encode the ligand specificity. Hop-derived compounds are renowned bioactive molecules and are considered as potential hit molecules for drug discovery to treat metabolic diseases. A chemoinformatics analysis revealed that hop-derived compounds cluster in a different region of the chemical space compared to known bitter food-derived compounds, pinpointing hop-derived compounds as a very peculiar class of bitter compounds.
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Affiliation(s)
- Andreas Dunkel
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner Straße 34, D-85354 Freising, Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Straße 34, D-85354 Freising, Germany
| | - Antonella Di Pizio
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner Straße 34, D-85354 Freising, Germany
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17
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Hao J, Speers R, Fan H, Deng Y, Dai Z. A Review of Cyclic and Oxidative Bitter Derivatives of Alpha, Iso-Alpha and Beta-Hop Acids. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2020. [DOI: 10.1080/03610470.2020.1712641] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Junguang Hao
- Key Laboratory of Characteristic Fruits and Vegetables Fermentation, College of Food Science and Engineering, Beibu Gulf University, Qinzhou, Guangxi, P.R. China
| | - R.A. Speers
- Canadian Institute of Fermentation Technology, Dalhousie University, Halifax, Nova Scotia Canada
- International Centre of Brewing and Distilling, Heriot Watt University, Riccarton, Edinburgh, Scotland
- Department of Brewing Science, Qilu University, Jinan, Shandong, P.R. China
| | - Heliang Fan
- Key Laboratory of Characteristic Fruits and Vegetables Fermentation, College of Food Science and Engineering, Beibu Gulf University, Qinzhou, Guangxi, P.R. China
| | - Yang Deng
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong, P.R. China
| | - Ziru Dai
- Key Laboratory of Characteristic Fruits and Vegetables Fermentation, College of Food Science and Engineering, Beibu Gulf University, Qinzhou, Guangxi, P.R. China
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18
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Ceola D, Huelsmann RD, Da‐Col JA, Martendal E. Headspace‐solid phase microextraction and GC‐MS followed by multivariate data analysis to study the effect of hop processing type and dry hopping time on the aromatic profile of top‐fermented beers. SEPARATION SCIENCE PLUS 2019. [DOI: 10.1002/sscp.201900012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Duan Ceola
- Chemistry DepartmentSanta Catarina State University Joinville SC Brazil
- Superior School of Beer and Malt Blumenau SC Brazil
| | | | | | - Edmar Martendal
- Chemistry DepartmentSanta Catarina State University Joinville SC Brazil
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19
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Tang YQ, Li YQ, Xie YB, Zhang JS, Li W, Lou LL, Zhang G, Yin S. Evodialones A and B: Polyprenylated Acylcyclopentanone Racemates with a 3-Ethyl-1,1-diisopentyl-4-methylcyclopentane Skeleton from Evodia lepta. JOURNAL OF NATURAL PRODUCTS 2018; 81:1483-1487. [PMID: 29847131 DOI: 10.1021/acs.jnatprod.7b00993] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two polyprenylated acylcyclopentanone racemates, evodialones A (1) and B (2), featuring a 3-ethyl-1,1-diisopentyl-4-methylcyclopentane skeleton, were isolated from an extract of the aerial parts of Evodia lepta. Evodialone A (1) was resolved by chiral-phase HPLC to afford a pair of enantiomers, (+)- and (-)-evodialones A (1b/1a), while evodialone B (2) could not be resolved. Their structures were elucidated by spectroscopic analysis and a combination of computational techniques including gauge-independent atomic orbital calculation of 1D NMR data and experimental and TDDFT-calculated ECD spectra. A putative biosynthetic pathway of 1 and 2 starting from the monocyclic polyprenylated acylphloroglucinols is proposed. All the isolates were screened for the antimicrobial activity in vitro, and 1a and 1b showed moderate inhibitory activities against several pathogenic fungi with MICs values of 17.1-68.3 μM.
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Affiliation(s)
- Ya-Qi Tang
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Yi-Qiu Li
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Yi-Bo Xie
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Jun-Sheng Zhang
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Wei Li
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Lan-Lan Lou
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Ge Zhang
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
| | - Sheng Yin
- School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou , Guangdong 510006 , People's Republic of China
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Bryant RW“R, Cohen SD. Characterization of Hop Acids in Spent Brewer's Yeast from Craft and Multinational Sources. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2018. [DOI: 10.1094/asbcj-2015-0315-01] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Seth D. Cohen
- Fermentation Sciences, Appalachian State University, Boone, NC 28808
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21
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Quifer-Rada P, Chiva-Blanch G, Jáuregui O, Estruch R, Lamuela-Raventós RM. A discovery-driven approach to elucidate urinary metabolome changes after a regular and moderate consumption of beer and nonalcoholic beer in subjects at high cardiovascular risk. Mol Nutr Food Res 2017; 61. [PMID: 28608394 DOI: 10.1002/mnfr.201600980] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 05/24/2017] [Accepted: 05/30/2017] [Indexed: 01/15/2023]
Abstract
SCOPE The aim of this work was to study the urinary metabolomics changes of participants that consumed beer, nonalcoholic beer (na-beer), and gin. METHODS AND RESULTS Thirty-three males at high cardiovascular risk between 55 and 75 years old participated in an open, randomized, crossover, controlled trial with three nutritional interventions consisting of beer, na-beer, and gin for 4 wk. Diet and physical activity was monitored throughout the study and compliance was assessed by measurement of urinary isoxanthohumol. Metabolomic analysis was performed in urine samples by LC coupled to an LTQ-Orbitrap mass spectrometer combined with univariate and multivariate statistical analysis. Ten metabolites were identified. Eight were exogenous metabolites related to beer, na-beer, or gin consumption, but two of them were related to endogenic changes: hydroxyadipic acid linked to fatty acid oxidation, and 4-guanidinobutanoic acid, which correlated with a decrease in urinary creatinine. Plasmatic acylcarnitines were quantified by targeted MS. A regular and moderate consumption of beer and na-beer decreased stearoylcarnitine concentrations. CONCLUSION Humulinone and 2,3-dihydroxy-3-methylvaleric acid showed to be potential biomarkers of beer and na-beer consumption. Moreover, the results of this trial provide new evidence that the nonalcoholic fraction of beer may increase fatty oxidation.
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Affiliation(s)
- Paola Quifer-Rada
- Department of Nutrition, Food Science and Gastronomy-XARTA-INSA-UB, School of Pharmacy and Food Science, University of Barcelona, Barcelona, Spain.,CIBEROBN del Instituto de Salud Carlos III, ISCIII, Madrid, Spain
| | - Gemma Chiva-Blanch
- Department of Internal Medicine, Hospital Clinic, Institute of Biomedical Investigation August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.,Cardiovascular Research Center (CSIC-ICCC), Barcelona, Spain.,Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Olga Jáuregui
- Scientific and Technological Center of University of Barcelona (CCiTUB), Barcelona, Spain
| | - Ramon Estruch
- Department of Internal Medicine, Hospital Clinic, Institute of Biomedical Investigation August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Rosa M Lamuela-Raventós
- Department of Nutrition, Food Science and Gastronomy-XARTA-INSA-UB, School of Pharmacy and Food Science, University of Barcelona, Barcelona, Spain.,CIBEROBN del Instituto de Salud Carlos III, ISCIII, Madrid, Spain
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Oladokun O, Tarrega A, James S, Smart K, Hort J, Cook D. The impact of hop bitter acid and polyphenol profiles on the perceived bitterness of beer. Food Chem 2016; 205:212-20. [DOI: 10.1016/j.foodchem.2016.03.023] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 03/07/2016] [Accepted: 03/08/2016] [Indexed: 10/22/2022]
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Oladokun O, Smart K, Cook D. An improved HPLC method for single-run analysis of the spectrum of hop bittering compounds usually encountered in beers. JOURNAL OF THE INSTITUTE OF BREWING 2016. [DOI: 10.1002/jib.299] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Olayide Oladokun
- Brewing Science Section, Division of Food Sciences; The University of Nottingham; Sutton Bonington campus Loughborough LE12 5RD UK
| | - Katherine Smart
- SABMiller Plc; SABMiller House, Church Street West Woking Surrey GU21 6HS UK
| | - David Cook
- Brewing Science Section, Division of Food Sciences; The University of Nottingham; Sutton Bonington campus Loughborough LE12 5RD UK
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24
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Beer metabolomics: molecular details of the brewing process and the differential effects of late and dry hopping on yeast purine metabolism. JOURNAL OF THE INSTITUTE OF BREWING 2016. [DOI: 10.1002/jib.291] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Taniguchi Y, Yamada M, Taniguchi H, Matsukura Y, Shindo K. Chemical Characterization of Beer Aging Products Derived from Hard Resin Components in Hops (Humulus lupulus L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:10181-10191. [PMID: 26507444 DOI: 10.1021/acs.jafc.5b04138] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The bitter taste of beer originates from resins in hops (Humulus lupulus L.), which are classified into two subtypes (soft and hard). Whereas the nature and reactivity of soft-resin-derived compounds, such as α-, β-, and iso-α-acids, are well studied, there is only a little information on the compounds in hard resin. For this work, hard resin was prepared from stored hops and investigated for its compositional changes in an experimental model of beer aging. The hard resin contained a series of α-acid oxides. Among them, 4'-hydroxyallohumulinones were unstable under beer storage conditions, and their transformation induced primary compositional changes of the hard resin during beer aging. The chemical structures of the products, including novel polycyclic compounds scorpiohumulinols A and B and dicyclohumulinols A and B, were determined by HRMS and NMR analyses. These compounds were proposed to be produced via proton-catalyzed cyclization reactions of 4'-hydroxyallohumulinones. Furthermore, they were more stable than their precursor 4'-hydroxyallohumulinones during prolonged storage periods.
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Affiliation(s)
- Yoshimasa Taniguchi
- Central Laboratories for Key Technologies, Research & Development Division, KIRIN Company, Ltd. , 1-13-5 Fukuura Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Makiko Yamada
- Central Laboratories for Key Technologies, Research & Development Division, KIRIN Company, Ltd. , 1-13-5 Fukuura Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Harumi Taniguchi
- Central Laboratories for Key Technologies, Research & Development Division, KIRIN Company, Ltd. , 1-13-5 Fukuura Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Yasuko Matsukura
- Central Laboratories for Key Technologies, Research & Development Division, KIRIN Company, Ltd. , 1-13-5 Fukuura Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Kazutoshi Shindo
- Department of Food and Nutrition, Japan Women's University , 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan
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Taniguchi Y, Matsukura Y, Taniguchi H, Koizumi H, Katayama M. Development of preparative and analytical methods of the hop bitter acid oxide fraction and chemical properties of its components. Biosci Biotechnol Biochem 2015; 79:1684-94. [PMID: 25996959 DOI: 10.1080/09168451.2015.1042832] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The bitter acids in hops (Humulus lupulus L.) and beer, such as α-, β-, and iso-α-acids, are known to affect beer quality and display various physiological effects. However, these compounds readily oxidize, and the effect of the oxides on the properties of beer or their potential health benefits are not well understood. In this study, we developed a simple preparative method for the bitter acid oxide fraction derived from hops and designated the constituents as matured hop bitter acids (MHBA). HPLC-PDA-ESI/HRMS and MS(2) revealed that MHBA are primarily composed of α-acid-derived oxides, which possess a common β-tricarbonyl moiety in their structures similar to α-, β-, and iso-α-acids. We also developed a quantitative analytical method of whole MHBA by HPLC, which showed high precision and reproducibility. Using our newly developed method, the concentration of whole MHBA in several commercial beers was evaluated. Our results will promote the study of bitter acid oxides.
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Affiliation(s)
- Yoshimasa Taniguchi
- a Central Laboratories for Key Technologies, Research & Development Division , KIRIN Company, Ltd. , Kanagawa , Japan
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27
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Londesborough J, Dresel M, Gibson B, Juvonen R, Holopainen U, Mikkelson A, Seppänen-Laakso T, Viljanen K, Virtanen H, Wilpola A, Hofmann T, Wilhelmson A. Analysis of beers from an 1840s' shipwreck. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:2525-2536. [PMID: 25664918 DOI: 10.1021/jf5052943] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two bottles of beer from an about 170-year-old shipwreck (M1 Fö 403.3) near the Åland Islands in the Baltic Sea were analyzed. Hop components and their degradation compounds showed that the bottles contained two different beers, one more strongly hopped than the other. The hops used contained higher levels of β-acids than modern varieties and were added before the worts were boiled, converting α-acids to iso-α-acids and β-acids to hulupones. High levels of organic acids, carbonyl compounds, and glucose indicated extensive bacterial and enzyme activity during aging. However, concentrations of yeast-derived flavor compounds were similar to those of modern beers, except that 3-methylbutyl acetate was unusually low in both beers and 2-phenylethanol and possibly 2-phenylethyl acetate were unusually high in one beer. Concentrations of phenolic compounds were similar to those in modern lagers and ales.
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Affiliation(s)
- John Londesborough
- VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Finland
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Dušek M, Olšovská J, Krofta K, Jurková M, Mikyška A. Qualitative determination of β-acids and their transformation products in beer and hop using HR/AM-LC-MS/MS. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:7690-7697. [PMID: 25099125 DOI: 10.1021/jf501852r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hops represent an important source of β-acids with antimicrobial and sensory properties. Transformation products of β-acids formed during their oxidation, mainly hulupones, have been shown to have an interesting kind of bitterness. Their structures were recently elucidated using LC-TOFMS and 1D/2D NMR in solution after thermal treatment of the hop β-acids. This study demonstrates the advantages of MS detection with high resolution and accurate mass measurements. The structure of transformation products in an experimental solution of oxidized β-acids was elucidated using a newly developed method by hybrid quadrupole-Orbitrap MS. In addition to already known structures, two new ones were identified and named epoxycohulupone and epoxyhulupone. The method was verified on real samples; the profiles of these products in Sládek hops harvested in 2008 and 2012 and in corresponding beers were compared. For this purpose, a new QuEChERS assay was used for the preparation of beer samples.
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Affiliation(s)
- Martin Dušek
- Research Institute for Brewing and Malting, Prague PLC, Lı́pová 15, CZ-120 44 Prague 2, Czech Republic
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Solid-state determination of hop bitter acids in beer by UV–MALDI–Orbitrap mass spectrometry. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2014. [DOI: 10.1007/s11694-014-9195-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Henley T, Reddivari L, Broeckling CD, Bunning M, Miller J, Avens JS, Stone M, Prenni JE, Vanamala J. American India Pale Ale matrix rich in xanthohumol is potent in suppressing proliferation and elevating apoptosis of human colon cancer cells. Int J Food Sci Technol 2014. [DOI: 10.1111/ijfs.12570] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Twila Henley
- Department of Food Science and Human Nutrition; Colorado State University; 1571 Campus mail Fort Collins CO 80523 USA
| | - Lavanya Reddivari
- Department of Plant Science; Pennsylvania State University; University Park PA 16802 USA
| | - Corey D. Broeckling
- Proteomics and Metabolomics Facility; Colorado State University; Fort Collins CO 80523 USA
| | - Marisa Bunning
- Department of Food Science and Human Nutrition; Colorado State University; 1571 Campus mail Fort Collins CO 80523 USA
| | - Jeff Miller
- Department of Food Science and Human Nutrition; Colorado State University; 1571 Campus mail Fort Collins CO 80523 USA
| | - John S. Avens
- Department of Food Science and Human Nutrition; Colorado State University; 1571 Campus mail Fort Collins CO 80523 USA
| | - Martha Stone
- Department of Food Science and Human Nutrition; Colorado State University; 1571 Campus mail Fort Collins CO 80523 USA
| | - Jessica E. Prenni
- Proteomics and Metabolomics Facility; Colorado State University; Fort Collins CO 80523 USA
| | - Jairam Vanamala
- Department of Food Science; Pennsylvania State University; University Park PA 16802 USA
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Van Opstaele F, Praet T, Aerts G, De Cooman L. Characterization of novel single-variety oxygenated sesquiterpenoid hop oil fractions via headspace solid-phase microextraction and gas chromatography-mass spectrometry/olfactometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:10555-10564. [PMID: 24152289 DOI: 10.1021/jf402496t] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The volatile composition of novel varietal oxygenated sesquiterpenoid hop oil fractions ("spicy essences") was characterized by headspace solid-phase microextraction in combination with gas chromatography-mass spectrometry. Oxygenated sesquiterpenes represent the major chemical compound class, accounting for at least 65% of the total volatile fraction. In addition to oxygenated sesquiterpenes, spicy hop essences consist of several ketones, sesquiterpene and monoterpene hydrocarbons, and a relatively high number of unidentified compounds. On the basis of their relative composition, spicy hop essences can be fully differentiated according to their varietal origin. Multidimensional gas chromatography in combination with time-of-flight mass spectrometry on spicy hop essence cv. Spalter Select further demonstrated the enormous complexity of this particular hop oil fraction. The aromagram obtained via gas chromatography-olfactometry comprised nine odor-active regions described in terms of "citrus", "green", "haylike", "earthy", "woody", and "spicy". 2-Undecanone, 2-tridecanone, γ-cadinene, α-calacorene, calarene, humuladienone, caryolan-1-ol, caryophyllene oxide enantiomers, and humulene epoxide II are tentatively identified in the odor-active zones.
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Affiliation(s)
- Filip Van Opstaele
- KAHO Sint-Lieven (KU Leuven) , Faculty of Engineering Technology, Department of Microbial and Molecular Systems (M2S), Cluster Bio-engineering Technology (CBeT), Laboratory of Enzyme, Fermentation and Brewing Technology (EFBT), Gebroeders De Smetstraat 1, 9000 Gent, Belgium
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Cattoor K, Dresel M, De Bock L, Boussery K, Van Bocxlaer J, Remon JP, De Keukeleire D, Deforce D, Hofmann T, Heyerick A. Metabolism of hop-derived bitter acids. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:7916-24. [PMID: 23898921 DOI: 10.1021/jf300018s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In this study, in vitro metabolism of hop-derived bitter acids was investigated. Besides their well-known use as bitter compounds in beer, in several studies, bioactive properties have been related to these types of molecules. However, scientific data on the absorption, distribution, metabolism, and excretion aspects of these compounds are limited. More specific, in this study, α-acids, β-acids, and iso-α-acids were incubated with rabbit microsomes, and fractions were subjected to LC-MS/MS analysis for identification of oxidative biotransformation products. Metabolism of β-acids was mainly characterized by conversion into hulupones and the formation of a series of tricyclic oxygenated products. The most important metabolites of α-acids were identified as humulinones and hulupones. Iso-α-acids were found to be primarly metabolized into cis- and trans-humulinic acids, next to oxidized alloiso-α-acids. Interestingly, the phase I metabolites were highly similar to the oxidative degradation products in beer. These findings show a first insight into the metabolites of hop-derived bitter acids and could have important practical implications in the bioavailability aspects of these compounds, following ingestion of hop-based food products and nutraceuticals.
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Affiliation(s)
- Ko Cattoor
- Laboratory of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences, Ghent University (UGent), Ghent, Belgium.
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Popescu V, Soceanu A, Dobrinas S, Stanciu G. A study of beer bitterness loss during the various stages of the Romanian beer production process. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/jib.82] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Viorica Popescu
- Department of Chemistry and Chemical Engineering; ‘Ovidius’ University of Constanta; 124, Mamaia Blvd; 900527; Constanta; Romania
| | - Alina Soceanu
- Department of Chemistry and Chemical Engineering; ‘Ovidius’ University of Constanta; 124, Mamaia Blvd; 900527; Constanta; Romania
| | - Simona Dobrinas
- Department of Chemistry and Chemical Engineering; ‘Ovidius’ University of Constanta; 124, Mamaia Blvd; 900527; Constanta; Romania
| | - Gabriela Stanciu
- Department of Chemistry and Chemical Engineering; ‘Ovidius’ University of Constanta; 124, Mamaia Blvd; 900527; Constanta; Romania
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Taniguchi Y, Matsukura Y, Ozaki H, Nishimura K, Shindo K. Identification and quantification of the oxidation products derived from α-acids and β-acids during storage of hops ( Humulus lupulus L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:3121-30. [PMID: 23469991 DOI: 10.1021/jf3047187] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
α-Acids and β-acids, two main components of hop resin, are known to be susceptible to oxygen and degraded during hop storage, although the oxidation products in stored hops have not been fully identified. In this study, we developed a high-performance liquid chromatography (HPLC) analysis method suitable for separation and quantification of the oxidation products. This HPLC analysis clearly proved, for the first time, that humulinones and hulupones are major products in oxidized hops. We are also the first to identify novel 4'-hydroxy-allohumulinones, suggested to be oxidative products of humulinones, by means of NMR spectroscopy and high-resolution mass spectrometry. Using the developed analytical method, changes in α- and β-acids and their oxidation products during hop storage were clearly revealed for the first time.
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Affiliation(s)
- Yoshimasa Taniguchi
- Research Laboratories for Health Science & Food Technologies, Research & Development Division, KIRIN Company, Ltd. , 1-13-5, Fukuura, Kanagawa 236-0004, Japan.
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de Almeida NEC, do Nascimento ESP, Cardoso DR. On the reaction of lupulones, hops β-acids, with 1-hydroxyethyl radical. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:10649-10656. [PMID: 23031058 DOI: 10.1021/jf302708c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Lupulones, hops β-acids, are one of the main constituents of the hops resin and have an important contribution to the overall bacteriostatic activity of hops during beer brewing. The use of lupulones as natural alternatives to antibiotics is increasing in the food industry and also in bioethanol production. However, lupulones are easy oxidizable and have been shown to be very reactive toward 1-hydroxyethyl radical with apparent bimolecular rate constants close to diffusion control k = 2.9 × 10(8) and 2.6 × 10(8) L mol(-1) s(-1) at 25.0 ± 0.2 °C in ethanol-water solution (10% of ethanol (v/v)) as probed by EPR and ESI-IT-MS/MS spin-trapping competitive kinetics, respectively. The free energy change for an electron-transfer mechanism is ΔG° = 106 kJ/mol as calculated from the oxidation peak potential experimentally determined for lupulones (1.1 V vs NHE) by cyclic voltammetry and the reported reduction potential for 1-hydroxyethyl radical. The major reaction products identified by LC-ESI-IT-MS/MS and ultrahigh-resolution accurate mass spectrometry (orbitrap FT-MS) are hydroxylated lupulone derivatives and 1-hydroxyethyl radical adducts. The lack of pH dependence for the reaction rate constant, the calculated free energy change for electron transfer, and the main reaction products strongly suggest the prenyl side chains at the hops β-acids as the reaction centers rather than the β,β'-triketone moiety.
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Affiliation(s)
- Natália E C de Almeida
- Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador São-Carlense 400, CP 780, CEP 13560-970 São Carlos, SP, Brazil
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Gros J, Peeters F, Collin S. Occurrence of odorant polyfunctional thiols in beers hopped with different cultivars. First evidence of an S-cysteine conjugate in hop (Humulus lupulus L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:7805-16. [PMID: 22769850 DOI: 10.1021/jf301478m] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Forty-one thiols, mainly β-sulfanylalkyl acetates, β-sulfanylalkyl alcohols, and β-sulfanylalkyl carbonyls, were recently evidenced in hop. In a beer hopped with the Tomahawk cultivar, most of them were found at higher levels than expected. The aim of the present work was to investigate the polyfunctional thiols in beers hopped with different varieties. A few thiols proved not to come only from hop (mainly 2-sulfanylethyl acetate, μg/L levels, and 1-sulfanylpentan-3-one and 1-sulfanylpentan-3-ol, ng/L levels, internal standard (IST) equivalents). The thiol profile of Saaz-hopped beer proved similar to that of the reference beer produced without hop. A high level of 3-sulfanyloctan-1-ol emerged as an indicator of the use of Tomahawk hop (140 ng/L, IST equivalents; FD (flavor dilution) = 65536). In both Cascade- and Tomahawk-hopped beers, 3-sulfanylhexan-1-ol and 3-sulfanylheptan-1-ol were smelled at high flavor dilutions, although only for the latter, significant amounts of the unreduced 3-sulfanylheptanal were found in hop. As already claimed for hop authentication, 3-sulfanyl-4-methylpentan-1-ol remains a good marker of Nelson Sauvin-hopped beers (548 ng/L, IST equivalents; FD = 65536), together with 4-sulfanyl-4-methylpentan-2-one (128 ng/L, FD = 4096). As illustrated by the huge production occurring during fermentation, accurate prediction of hop varietal impact requires quantitating thiol adducts in hop. S-3-(1-Hydroxyhexyl)cysteine was evidenced here for the first time in Cascade hop.
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Affiliation(s)
- Jacques Gros
- Unité de brasserie et des industries alimentaires, Earth and Life Institute ELIM, Faculté d'Ingénierie biologique, agronomique et environnementale, Université catholique de Louvain, Louvain-la-Neuve, Belgium
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Caballero I, Blanco CA, Porras M. Iso-α-acids, bitterness and loss of beer quality during storage. Trends Food Sci Technol 2012. [DOI: 10.1016/j.tifs.2012.01.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Walker J, Hell J, Liszt KI, Dresel M, Pignitter M, Hofmann T, Somoza V. Identification of beer bitter acids regulating mechanisms of gastric acid secretion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1405-1412. [PMID: 22313115 DOI: 10.1021/jf204306z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Beer, one of the most consumed beverages worldwide, has been shown to stimulate gastric acid secretion. Although organic acids, formed by fermentation of glucose, are known to be stimulants of gastric acid secretion, very little is known about the effects of different types of beer or the active constituents thereof. In the present study, we compared the effects of different beers on mechanisms of gastric acid secretion. To investigate compound-specific effects on mechanisms of gastric acid secretion, organic acids and bitter compounds were quantified by HPLC-DAD and UPLC-MS/MS and tested in human gastric cancer cells (HGT-1) by means of a pH-sensitive fluorescent dye which determines the intracellular pH as an indicator of proton secretion. The expression of relevant genes, coding the H(+)/K(+)-ATPase, ATP4A, the histamine receptor, HRH2, the acetylcholine receptor, CHRM3, and the somatostatin receptor, SSTR2, was determined by qPCR. Ethanol and the organic acids succinic acid, malic acid, and citric acid were demonstrated to contribute to some extent to the effect of beer. The bitter acids comprising α-, β-, and iso-α-acids were identified as potential key components promoting gastric acid secretion and up-regulation of CHRM3 gene expression by a maximum factor of 2.01 compared to that of untreated control cells with a correlation to their respective bitterness.
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Affiliation(s)
- Jessica Walker
- Department of Nutritional and Physiological Chemistry, University of Vienna, Althanstrasse 14 (UZA II), A-1090 Vienna, Austria
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de Almeida NEC, Homem-de-Mello P, De Keukeleire D, Cardoso DR. Reactivity of beer bitter acids toward the 1-hydroxyethyl radical as probed by spin-trapping electron paramagnetic resonance (EPR) and electrospray ionization-tandem mass spectrometry (ESI-MS/MS). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:4183-4191. [PMID: 21401101 DOI: 10.1021/jf104797d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The iso-α-acids or isohumulones are the major contributors to the bitter taste of beer, and it is well-recognized that they are degraded during beer aging. In particular, the trans-isohumulones seem to be less stable than the cis-isohumulones. The major radical identified in beer is the 1-hydroxyethyl radical; however, the reactivity between this radical and the isohumulones has not been reported until now. Therefore, we studied the reactivity of isohumulones toward the 1-hydroxyethyl radical through a competitive kinetic approach. It was observed that both cis- and trans-isohumulones and dihydroisohumulones are decomposed in the presence of 1-hydroxyethyl radicals, while the reactivities are comparable. On the other hand, the tetrahydroisohumulones did not react with 1-hydroxyethyl radicals. The apparent second-order rate constants for the reactions between the 1-hydroxyethyl radical and these compounds were determined by electron paramagnetic resonance (EPR) spectroscopy and electrospray ionization-tandem mass spectrometry [ESI(+)-MS/MS]. It follows that degradation of beer bitter acids is highly influenced by the presence of 1-hydroxyethyl radicals. The reaction products were detected by liquid chromatography-electrospray ionization-ion trap-tandem mass spectrometry (LC-ESI-IT-MS/MS), and the formation of oxidized derivatives of the isohumulones was confirmed. These data help to understand the mechanism of beer degradation upon aging.
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Affiliation(s)
- Natália E C de Almeida
- Instituto de Química de São Carlos (IQSC), Universidade de São Paulo, São Carlos, São Paulo, Brazil
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Intelmann D, Haseleu G, Dunkel A, Lagemann A, Stephan A, Hofmann T. Comprehensive sensomics analysis of hop-derived bitter compounds during storage of beer. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:1939-53. [PMID: 21302939 DOI: 10.1021/jf104392y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
For the first time, quantitative LC-MS/MS profiling of 56 hop-derived sensometabolites contributing to the bitter taste of beer revealed a comprehensive insight into the transformation of individual bitter compounds during storage of beer. The proton-catalyzed cyclization of trans-iso-α-acids was identified to be the quantitatively predominant reaction leading to lingering, harsh bitter tasting tri- and tetracyclic compounds such as, e.g. the cocongeners tricyclocohumol, tricyclocohumene, isotricyclocohumene, tetracyclocohumol, and epitetracyclocohumol, accumulating in beer during storage with increasing time and temperature. The key role of these transformation products in storage-induced trans-iso-α-acid degradation was verified for the first time by multivariate statistics and hierarchical cluster analysis of the sensomics data obtained for a series of commercial beer samples stored under controlled conditions. The present study offers the scientific basis for a knowledge-based extension of the shelf life of the desirable beer's bitter taste and the delay of the onset of the less preferred harsh bitter aftertaste by controlling the initial pH value of the beer and by keeping the temperature as low as possible during storage of the final beverage.
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Affiliation(s)
- Daniel Intelmann
- Chair of Food Chemistry and Molecular Sensory Science, Technische Universität München, Lise-Meitner Strasse 34, D-85354 Freising, Germany
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