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Curtasu MV, Nørskov NP. Quantitative distribution of flavan-3-ols, procyanidins, flavonols, flavanone and salicylic acid in five varieties of organic winter dormant Salix spp. by LC-MS/MS. Heliyon 2024; 10:e25129. [PMID: 38333780 PMCID: PMC10850552 DOI: 10.1016/j.heliyon.2024.e25129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/30/2023] [Accepted: 01/21/2024] [Indexed: 02/10/2024] Open
Abstract
Willow trees (Salix spp.) exhibit remarkable genetic and phenotypic diversity, yielding a broad spectrum of bioactive compounds, notably valuable phenolic compounds such as condensed tannins (phenolic polymers), flavonoids, salicylic glucosides, and phenolic compounds. These enhance the economic value of willow crops and make them suitable for circular bioeconomy. Phenolic compounds known for their diverse applications as antioxidants, antimicrobial agents, pharmaceuticals, nutraceuticals and antiseptics and more, find a natural source in willow. This study aimed to elucidate the composition of 12 flavonoids and salicylic acid in different segments of five organic winter dormant willow species (S. daphnoides, S. fragilis, S. dasyclados, S. viminalis, and S. dasyclados x viminalis) using quantitative analysis and providing valuable insights into their high-value phenolic compounds. Separation into buds, wood and bark segments allowed for a precise characterization of the location of certain phenolic compounds and quantification using LC-MS/MS techniques. LC-MS/MS is an analytical technique known for its increased sensitivity and chromatographic precision. Among the findings, catechin emerged as the predominant flavan-3-ol in all Salix species, with the highest concentration in the buds of Salix viminalis (7.26 mg/g DM). Naringenin exhibited species-specific variations, with S. dasyclados and S. viminalis recording the highest levels. Salicylic acid concentrations peaked in S. dasyclados (5.38 mg/g DM) and S. daphnoides (4.43 mg/g DM), particularly within the bark. When evaluating other individual flavonoids and total polyphenol content (TPC), disparities between buds, bark, and wood became evident, with wood consistently displaying the lowest content. Notably, the higher concentration of polyphenolic compounds in willow bark can be attributed to its susceptibility to external threats and its role as a robust defense mechanism against pathogens and herbivores. This study underscores the significance of diverse willow species as a source of high-value phenolic compounds, distributed differentially across plant parts and species. This knowledge holds promise for their potential applications in the circular bioeconomy.
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Affiliation(s)
- Mihai Victor Curtasu
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark
| | - Natalja P. Nørskov
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark
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2
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Battelli M, Nielsen MO, Nørskov NP. Dose- and substrate-dependent reduction of enteric methane and ammonia by natural additives in vitro. Front Vet Sci 2023; 10:1302346. [PMID: 38026671 PMCID: PMC10657808 DOI: 10.3389/fvets.2023.1302346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023] Open
Abstract
Ruminants contribute to global warming by emitting greenhouse gasses, particularly methane (CH4) which is a product of rumen fermentation. The use of feed additives able to modulate rumen fermentation is a promising strategy to reduce enteric CH4 and ammonia (NH3) emissions. Among the various strategies investigated, plant secondary metabolites (PSMs) have attracted attention due to their apparent potential to reduce enteric CH4 and NH3 emissions, and it would be possible to use such compounds as feed additives in organic production systems. In an in vitro system simulating rumen fermentation, we have tested the impact of different classes of naturally occurring PSMs; catechin and quercetin (flavonoids), salicylic acid (phenolic acid) and tannic acid (hydrolysable tannin). The PSMs were added to two different basal feeds (maize and grass silages) at three inclusion doses 1.5, 3 and 6% of the feed dry matter (DM). CH4 production was significantly lowered upon addition of quercetin to two basal feeds at doses of 3 and 6%, and this without changes in concentrations of total volatile fatty acid (VFA) produced during fermentation. Quercetin, as the only tested additive, reduced CH4 production, and when added to maize silage and grass silage, the reduction increased linearly with increasing dose, ie., by 51 and 43%, respectively, at a dose of 3% of feed DM and by 86 and 58%, respectively, at a dose of 6% of feed DM. Moreover, quercetin significantly reduced NH3 concentration by >12% at doses of 3 and 6% in feed DM irrespective of the basal feed used as compared to when the basal feeds were incubated alone. Although none of the other additives affected CH4 formation, several additives had significant impacts on concentrations of NH3 and VFAs in the incubated fluid after fermentation. This study demonstrated a dose-dependent ability of quercetin to reduce CH4 emission from rumen fermentation, however, the magnitude of the suppression of CH4 depended on the basal feed. Furthermore, quercetin reduced NH3 concentration irrespective of the basal feed type. These findings encourage to in vivo studies to verify whether quercetin can reduce CH4 emission also in cows.
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Affiliation(s)
- Marco Battelli
- Department of Agricultural and Environmental Sciences – Production, Landscape, Agroenergy, University of Milan, Milan, Italy
| | - Mette Olaf Nielsen
- Department of Animal and Veterinary Sciences, AU Viborg – Research Center Foulum, Aarhus University, Tjele, Denmark
| | - Natalja P. Nørskov
- Department of Animal and Veterinary Sciences, AU Viborg – Research Center Foulum, Aarhus University, Tjele, Denmark
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Nørskov NP, Battelli M, Curtasu MV, Olijhoek DW, Chassé É, Nielsen MO. Methane reduction by quercetin, tannic and salicylic acids: influence of molecular structures on methane formation and fermentation in vitro. Sci Rep 2023; 13:16023. [PMID: 37749362 PMCID: PMC10519955 DOI: 10.1038/s41598-023-43041-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 09/18/2023] [Indexed: 09/27/2023] Open
Abstract
Plant secondary metabolites (PSMs) can potentially reduce ruminal methane formation. However, related to differences in their molecular structures, it is not yet clear what causes an anti-methanogenic effect. In an in vitro system simulating rumen fermentation, we investigated the impact of eight compounds with distinct chemical characteristics (gallic and salicylic acids, tannic acid, catechin, epicatechin, quercetin, rutin, and salicin) when added to a basal feed (maize silage) at a concentration of 12% of the feed dry matter. After 48 h of incubation in buffered rumen fluid, methane production was significantly lowered by quercetin (43%), tannic acid (39%) and salicylic acid (34%) compared to the control (maize silage alone) and without changes in total volatile fatty acid production during fermentation. No other PSM reduced methane formation as compared to control but induced significant differences on total volatile fatty acid production. The observed differences were related to lipophilicity, the presence of double bond and carbonyl group, sugar moieties, and polymerization of the compounds. Our results indicate the importance of distinct molecular structures of PSMs and chemical characteristics for methane lowering properties and volatile fatty acid formation. Further systematic screening studies to establish the structure-function relationship between PSMs and methane reduction are warranted.
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Affiliation(s)
- Natalja P Nørskov
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark.
| | - Marco Battelli
- Department of Agricultural and Environmental Sciences-Production, Landscape, Agroenergy, Università degli Studi di Milano, Via Celoria 2, 20133, Milan, Italy
| | - Mihai V Curtasu
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
| | - Dana W Olijhoek
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
| | - Élisabeth Chassé
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
| | - Mette Olaf Nielsen
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
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Curtasu MV, Nørskov NP. Comprehensive quantification of flavonoids and salicylic acid representative of Salix spp. using microLiquid Chromatography-Triple Quadrupole Mass Spectrometry: the importance of drying procedures and extraction solvent when performing classical solid-liquid extraction. J Chromatogr A 2023; 1705:464139. [PMID: 37352692 DOI: 10.1016/j.chroma.2023.464139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 04/26/2023] [Accepted: 06/07/2023] [Indexed: 06/25/2023]
Abstract
Willow (Salix spp.) is gaining an increasing interest as a fast-growing tree with high biomass yield from low agricultural inputs, which contains potentially bioactive compounds. The present work aimed to develop a high-yield extraction procedure combined with robust, sensitive and fast microLiquid Chromatography-Triple Quadrupole Mass Spectrometry (LC-MS/MS) based method for comprehensively quantifying flavonoids and salicylic acid in the bark of Salix spp. We have investigated the effect of freeze- and oven-drying procedures and five extraction solvents on the yield of individual flavonoid and salicylic acid when performing classical solid-liquid extraction. The freeze-drying was the best drying procedure for preserving monomeric and polymeric flavan-3-ols, whereas other flavonoids were less affected. Salicylic acid was not affected by the drying procedures. The best extraction solvent in terms of the yield of individual flavonoid among the tested solvents in this study was the combination of methanol acidified with 1% hydrochloric acid. LC-MS/MS method has shown a high recovery percentage (≥80%), good precision and overall robustness.
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Affiliation(s)
- Mihai Victor Curtasu
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Alle 20, Tjele 8830, Denmark.
| | - Natalja P Nørskov
- Department of Animal and Veterinary Sciences, Aarhus University, Blichers Alle 20, Tjele 8830, Denmark
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Ahlin R, Nørskov NP, Nybacka S, Landberg R, Skokic V, Stranne J, Josefsson A, Steineck G, Hedelin M. Effects on Serum Hormone Concentrations after a Dietary Phytoestrogen Intervention in Patients with Prostate Cancer: A Randomized Controlled Trial. Nutrients 2023; 15:nu15071792. [PMID: 37049632 PMCID: PMC10097251 DOI: 10.3390/nu15071792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 03/29/2023] [Accepted: 04/04/2023] [Indexed: 04/08/2023] Open
Abstract
Phytoestrogens have been suggested to have an anti-proliferative role in prostate cancer, potentially by acting through estrogen receptor beta (ERβ) and modulating several hormones. We primarily aimed to investigate the effect of a phytoestrogen intervention on hormone concentrations in blood depending on the ERβ genotype. Patients with low and intermediate-risk prostate cancer, scheduled for radical prostatectomy, were randomized to an intervention group provided with soybeans and flaxseeds (∼200 mg phytoestrogens/d) added to their diet until their surgery, or a control group that was not provided with any food items. Both groups received official dietary recommendations. Blood samples were collected at baseline and endpoint and blood concentrations of different hormones and phytoestrogens were analyzed. The phytoestrogen-rich diet did not affect serum concentrations of testosterone, insulin-like growth factor 1, or sex hormone-binding globulin (SHBG). However, we found a trend of decreased risk of increased serum concentration of estradiol in the intervention group compared to the control group but only in a specific genotype of ERβ (p = 0.058). In conclusion, a high daily intake of phytoestrogen-rich foods has no major effect on hormone concentrations but may lower the concentration of estradiol in patients with prostate cancer with a specific genetic upset of ERβ.
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Affiliation(s)
- Rebecca Ahlin
- Department of Oncology, Division of Clinical Cancer Epidemiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Natalja P. Nørskov
- Department of Animal and Veterinary Sciences, Aarhus University, AU-Foulum, 8830 Tjele, Denmark
| | - Sanna Nybacka
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden
| | - Rikard Landberg
- Department of Life Sciences, Division of Food and Nutrition Science, Chalmers University of Technology, 41296 Gothenburg, Sweden
| | - Viktor Skokic
- Department of Oncology, Division of Clinical Cancer Epidemiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institute, 17176 Stockholm, Sweden
- Department of Pelvic Cancer, Karolinska University Hospital, 17176 Stockholm, Sweden
| | - Johan Stranne
- Department of Urology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
- Region Västra Götaland, Department of Urology, Sahlgrenska University Hospital, 41345 Gothenburg, Sweden
| | - Andreas Josefsson
- Sahlgrenska Cancer Center, Department of Urology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden
- Wallenberg Center for Molecular Medicine, Umeå University, 90187 Umeå, Sweden
- Department of Urology and Andrology, Institute of Surgery and Perioperative Sciences, Umeå University, 90187 Umeå, Sweden
| | - Gunnar Steineck
- Department of Oncology, Division of Clinical Cancer Epidemiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Maria Hedelin
- Department of Oncology, Division of Clinical Cancer Epidemiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
- Regional Cancer Center West, Sahlgrenska University Hospital, Region Västra Götaland, 41345 Gothenburg, Sweden
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Winters JF, Foldager L, Krogh U, Nørskov NP, Sørensen MT. Impact of glyphosate residues in sow diets on neonatal piglets: tail kinks, stillborn and diarrhoea. Livest Sci 2023. [DOI: 10.1016/j.livsci.2023.105172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Bruun TS, Eskildsen M, Hojgaard CK, Nørskov NP, Knudsen KEB, Theil PK, Feyera T. Feeding level during the last week of gestation can influence performance of sows and their litters in the subsequent lactation. J Anim Sci 2023; 101:skad349. [PMID: 37813381 PMCID: PMC10590173 DOI: 10.1093/jas/skad349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 10/07/2023] [Indexed: 10/11/2023] Open
Abstract
This study investigated the impact of feeding level during the last week of gestation on performance of sows and their litters in the subsequent lactation. A total of 48 sows were assigned to one of six feeding levels (1.8, 2.4, 3.1, 3.7, 4.3, or 5.0 kg/d) from day 108 of gestation until farrowing. Post-farrowing, all sows were fed similarly during lactation with a gradual increase in feed allowance in accordance with Danish recommendation until it reached the maximum allowance of 9 kg/d on day 17 of lactation. Plasma samples were collected from the sows during farrowing and lactation, and sow's body weight and backfat thickness, and milk samples were taken during lactation. Litters were standardized to have 13 to 15 piglets each and weighed once weekly during lactation. Plasma concentrations of urea, acetate, and butyrate in sows linearly increased (P < 0.001), while non-esterified fatty acids linearly decreased (P < 0.001) during farrowing with increasing feeding level. Moreover, concentrations of triglycerides (P < 0.001), acetate (P = 0.007), and succinate (P < 0.001) were greater in plasma collected at the onset of farrowing compared to the end of farrowing. Conversely, concentrations of glucose, urea, and butyrate (P < 0.001) were lower in plasma collected at the onset of farrowing than at the end. Sows fed 2.4 and 3.1 kg/d exhibited greater triglyceride concentrations than those fed 3.7 (P = 0.03) and 5.0 (P = 0.02) kg/d. Sows fed 1.8 kg/d during the last week of gestation had lower milk yield in wk 1 (P < 0.001) and wk 2 (P = 0.001) of lactation compared to the other groups. Additionally, litter weight gain (P = 0.04) and litter weaning weight (P = 0.007) were lower in sows fed 1.8 kg/d compared to the other groups. The greatest milk yield, litter growth, and litter size were observed in sows fed 3.7 kg/d during the last week of gestation, whereas the estimate generated by the regression model revealed that sows should have been provided with 4.0 to 4.1 kg/d as an adequate feeding level to maximize these performances in the subsequent lactation. Interestingly, feeding level during the last week of gestation did not influence feed intake during lactation. In conclusion, this study highlights the significance of adequate feed supply (4.0 to 4.1 kg/d) during the last week of gestation in order to maximize performance of sows in the subsequent lactation.
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Affiliation(s)
| | - Maria Eskildsen
- Department of Animal and Veterinary Sciences, Aarhus University AU-Viborg, DK-8830 Tjele, Denmark
| | | | - Natalja P Nørskov
- Department of Animal and Veterinary Sciences, Aarhus University AU-Viborg, DK-8830 Tjele, Denmark
| | - Knud Erik Bach Knudsen
- Department of Animal and Veterinary Sciences, Aarhus University AU-Viborg, DK-8830 Tjele, Denmark
| | - Peter K Theil
- Department of Animal and Veterinary Sciences, Aarhus University AU-Viborg, DK-8830 Tjele, Denmark
| | - Takele Feyera
- Department of Animal and Veterinary Sciences, Aarhus University AU-Viborg, DK-8830 Tjele, Denmark
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Jensen RH, Rønn M, Thorsteinsson M, Olijhoek DW, Nielsen MO, Nørskov NP. Untargeted Metabolomics Combined with Solid Phase Fractionation for Systematic Characterization of Bioactive Compounds in Hemp with Methane Mitigation Potential. Metabolites 2022; 12:metabo12010077. [PMID: 35050199 PMCID: PMC8779194 DOI: 10.3390/metabo12010077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/07/2022] [Accepted: 01/10/2022] [Indexed: 11/16/2022] Open
Abstract
This study systematically evaluates the presence of methane mitigating metabolites in two hemp (Cannabis sativa L.) varieties, Futura 75 and Finola. Hemp metabolites were extracted with methanol and fractionated using Solid Phase Extraction (SPE). Extracts, fractions, and the remaining pulp were screened for their methane mitigating potential using an in vitro model of rumen fermentation. The bioactive metabolites were identified with Liquid Chromatography-Mass Spectrometry (LC-MS). When incubated with a standard feed (maize silage), the extract of Futura 75 significantly reduced methane production compared to that of control (without added extract) and without negative effects on feed degradability and volatile fatty acid patterns. The compounds responsible for the methane mitigating effect were assigned to flavonoid glycosides. However, none of the fractions of Futura 75 or the pulp exhibited similar effect on methane emission. Butyric acid concentration in the fermentation inoculum was significantly increased, which could indicate why methane production was higher, when incubated with the fractions and the pulp. The extract of Finola did not show a similar significant effect, however, there was a numerical tendency towards lower methane production. The difference in methane mitigating properties between Cannabis sativa L. Futura 75 and Finola, could be related to the content of bioactive flavonoids.
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Krogh U, Højberg O, Foldager L, Rani S, Nørskov NP, Sørensen MT. Performance and mineral status of weaning pigs fed diets with different levels of glyphosate and tryptophan. Livest Sci 2021. [DOI: 10.1016/j.livsci.2021.104681] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Foldager L, Winters JFM, Nørskov NP, Sørensen MT. Impact of feed glyphosate residues on broiler breeder egg production and egg hatchability. Sci Rep 2021; 11:19290. [PMID: 34588614 PMCID: PMC8481226 DOI: 10.1038/s41598-021-98962-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/17/2021] [Indexed: 01/31/2023] Open
Abstract
Glyphosate is the active substance in glyphosate-based herbicides, e.g. Roundup. Its widespread application on feed crops leaves residues in the feed. Glyphosate has antimicrobial and mineral chelating properties and we investigated whether there is an association between feed residues of glyphosate on the one side and broiler breeder egg laying percent and egg hatchability on the other side. Twenty-six feed samples from five conventional flocks producing hatching eggs were analysed for glyphosate. Data on laying percent and egg hatchability from periods following each feed sampling were then associated with feed residues of glyphosate. The average glyphosate residue level was 0.09 mg/kg, maximum was 0.19 and minimum was 0.004 mg/kg. Average laying percent over observation days was 65% (SD = 5.4%) and average hatchability was 79% (SD = 5.8%). We found a negative association between feed glyphosate residue level and hatchability (P = 0.03) when adjusted for breeder age, storage time of eggs on farm before delivery and storage time at hatchery before incubation start. No association was found with laying percent (P = 0.59) adjusted for breeder age. The range of glyphosate concentrations in feed was narrow and should be kept in mind when interpreting both significant and non-significant associations with glyphosate residue concentrations. In nine of 24 analysed conventional eggs the concentration of glyphosate in yolk was above the detection limit however below the quantification limit indicating that traces of glyphosate are common in conventional eggs.
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Affiliation(s)
- Leslie Foldager
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark.
- Bioinformatics Research Centre, Aarhus University, C.F. Møllers Allé 8, 8000, Aarhus, Denmark.
| | - Jeanet F M Winters
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
| | - Natalja P Nørskov
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
| | - Martin T Sørensen
- Department of Animal Science, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark.
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Nørskov NP, Bruhn A, Cole A, Nielsen MO. Targeted and Untargeted Metabolic Profiling to Discover Bioactive Compounds in Seaweeds and Hemp Using Gas and Liquid Chromatography-Mass Spectrometry. Metabolites 2021; 11:metabo11050259. [PMID: 33922209 PMCID: PMC8146358 DOI: 10.3390/metabo11050259] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 11/16/2022] Open
Abstract
Greenhouse gas emissions are a global problem facing the dairy/beef industry. Novel feed additives consisting of seaweeds and hemp containing bioactive compounds are theorized to reduce enteric methane emissions. In this study we aimed to investigate the metabolic profiles of brown, red and green seaweeds and hemp using gas chromatography and liquid chromatography mass spectrometry. We used targeted and untargeted approaches, quantifying known halomethanes and phenolics, as well as identifying potentially novel bioactive compounds with anti-methanogenic properties. The main findings were: (a) Asparagopsis taxiformis contained halomethanes, with high concentrations of bromoform (4200 µg/g DW), six volatile halocarbons were tentatively identified; (b) no halomethanes were detected in the other studied seaweeds nor in hemp; (c) high concentrations of lignans were measured in hemp; (d) a high numbers of sulfated phenolic acids and unidentified sulfuric acid-containing compounds were detected in all seaweeds; (e) flavonoid glucosides and glucuronides were mainly identified in hemp; and (f) the condensed tannin gallocatechin was tentatively identified in Fucus sp. Using the combined metabolomics approach, an overview and in-depth information on secondary metabolites were provided. Halomethanes of Asparagopsis sp. have already been shown to be anti-methanogenic; however, metabolic profiles of seaweeds such as Dictyota and Sargassum have also been shown to contain compounds that may have anti-methanogenic potential.
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Affiliation(s)
- Natalja P. Nørskov
- Department of Animal Science, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark;
- Center for Circular Bioeconomy, Aarhus University, 8830 Tjele, Denmark
- Correspondence:
| | - Annette Bruhn
- Center for Circular Bioeconomy, Aarhus University, 8830 Tjele, Denmark
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark;
| | - Andrew Cole
- Center for Macroalgal Resources and Biotechnology, James Cook University, Douglas, QLD 4811, Australia;
| | - Mette Olaf Nielsen
- Department of Animal Science, Aarhus University, Blichers Alle 20, 8830 Tjele, Denmark;
- Center for Circular Bioeconomy, Aarhus University, 8830 Tjele, Denmark
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Nørskov NP. New Analytical Methods Measuring Conjugates of Phytochemicals Should Be Developed When Studying the Effect of a Plant-Based Diet on Human Health. J Agric Food Chem 2021; 69:3561-3562. [PMID: 33728908 DOI: 10.1021/acs.jafc.1c00921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Natalja P Nørskov
- Department of Animal Science, Aarhus University, 8830 Tjele, Denmark
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Vangsøe CT, Nørskov NP, Devaux MF, Bonnin E, Bach Knudsen KE. Carbohydrase Complexes Rich in Xylanases and Arabinofuranosidases Affect the Autofluorescence Signal and Liberate Phenolic Acids from the Cell Wall Matrix in Wheat, Maize, and Rice Bran: An In Vitro Digestion Study. J Agric Food Chem 2020; 68:9878-9887. [PMID: 32815725 DOI: 10.1021/acs.jafc.0c00703] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The high fiber content of cereal coproducts used in animal feed reduces the digestibility and nutrient availability. Therefore, the aim of this study was to elucidate the ability of two carbohydrase complexes to degrade the cell wall of wheat, maize, and rice during in vitro digestion. One complex was rich in cell-wall-degrading enzymes (NSPase 1), and the other was similar but additionally enriched with xylanases and arabinofuranosidases (NSPase 2). Degradation of arabinoxylan, the main cereal cell wall polysaccharide, was followed directly by gas-liquid chromatography (GLC) and indirectly through phenolic acid liberation as quantified by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The effect was additionally visualized using a unique multispectral autofluorescence approach. Wheat fractions, in particular aleurone, were susceptible to degradation as judged from the redistribution of arabinoxylan (25% reduction in insoluble arabinoxylan), whereas the highest relative liberation of ferulic acid was observed in rice bran (6%). All cereal fractions, except for maize, had a higher release of ferulic acid with NSPase 2 than NSPase 1 (38% in rice and wheat bran, 30% in wheat whole grain, and 28% in wheat aleurone). Thus, the carbohydrase complexes were able to degrade important cell wall components during in vitro digestion but apparently through different mechanisms in wheat, maize, and rice.
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Affiliation(s)
- C T Vangsøe
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - N P Nørskov
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - M F Devaux
- INRAE, UR1268 Biopolymers Interactions Assemblies, BP 71627, F44316 Nantes, France
| | - Estelle Bonnin
- INRAE, UR1268 Biopolymers Interactions Assemblies, BP 71627, F44316 Nantes, France
| | - K E Bach Knudsen
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
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14
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Eriksen AK, Brunius C, Mazidi M, Hellström PM, Risérus U, Iversen KN, Fristedt R, Sun L, Huang Y, Nørskov NP, Knudsen KEB, Kyrø C, Olsen A, Tjønneland A, Dicksved J, Landberg R. Effects of whole-grain wheat, rye, and lignan supplementation on cardiometabolic risk factors in men with metabolic syndrome: a randomized crossover trial. Am J Clin Nutr 2020; 111:864-876. [PMID: 32097450 DOI: 10.1093/ajcn/nqaa026] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 01/31/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND A whole-grain (WG)-rich diet has shown to have potential for both prevention and treatment of the metabolic syndrome (MetS), which is a cluster of risk factors that increase the risk of type 2 diabetes and cardiovascular disease. Different WGs may have different health effects. WG rye, in particular, may improve glucose homeostasis and blood lipids, possibly mediated through fermentable dietary fiber and lignans. Recent studies have also suggested a crucial role of the gut microbiota in response to WG. OBJECTIVES The aim was to investigate WG rye, alone and with lignan supplements [secoisolariciresinol diglucoside (SDG)], and WG wheat diets on glucose tolerance [oral-glucose-tolerance test (OGTT)], other cardiometabolic outcomes, enterolignans, and microbiota composition. Moreover, we exploratively evaluated the role of gut microbiota enterotypes in response to intervention diets. METHODS Forty men with MetS risk profile were randomly assigned to WG diets in an 8-wk crossover study. The rye diet was supplemented with 280 mg SDG at weeks 4-8. Effects of treatment were evaluated by mixed-effects modeling, and effects on microbiota composition and the role of gut microbiota as a predictor of response to treatment were analyzed by random forest plots. RESULTS The WG rye diet (± SDG supplements) did not affect the OGTT compared with WG wheat. Total and LDL cholesterol were lowered (-0.06 and -0.09 mmol/L, respectively; P < 0.05) after WG rye compared with WG wheat after 4 wk but not after 8 wk. WG rye resulted in higher abundance of Bifidobacterium [fold-change (FC) = 2.58, P < 0.001] compared with baseline and lower abundance of Clostridium genus compared with WG wheat (FC = 0.54, P = 0.02). The explorative analyses suggest that baseline enterotype is associated with total and LDL-cholesterol response to diet. CONCLUSIONS WG rye, alone or with SDG supplementation, compared with WG wheat did not affect glucose metabolism but caused transient LDL-cholesterol reduction. The effect of WG diets appeared to differ according to enterotype. This trial was registered at www.clinicaltrials.gov as NCT02987595.
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Affiliation(s)
- Anne K Eriksen
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.,Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Carl Brunius
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Mohsen Mazidi
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Per M Hellström
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Ulf Risérus
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Kia N Iversen
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Rikard Fristedt
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Li Sun
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Yi Huang
- Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, Sweden.,College of Animal Science and Technology, Guangxi University, Nanning, China
| | | | | | - Cecilie Kyrø
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Anja Olsen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Anne Tjønneland
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Johan Dicksved
- Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Rikard Landberg
- Division of Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
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15
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Xu Y, Curtasu MV, Bendiks Z, Marco ML, P. Nørskov N, Knudsen KEB, Hedemann MS, Lærke HN. Effects of dietary fibre and protein content on intestinal fibre degradation, short-chain fatty acid and microbiota composition in a high-fat fructose-rich diet induced obese Göttingen Minipig model. Food Funct 2020; 11:10758-10773. [DOI: 10.1039/d0fo02252g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An AX-enriched high DF diet improved the intestinal environment and attenuated protein fermentation, while protein did not show prebiotic effects.
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Affiliation(s)
- Yetong Xu
- Department of Animal Science
- Aarhus University
- DK-8830 Tjele
- Denmark
| | | | - Zachary Bendiks
- Department of Food Science and Technology
- University of California
- Davis
- USA
| | - Maria L. Marco
- Department of Food Science and Technology
- University of California
- Davis
- USA
| | - Natalja P. Nørskov
- Department of Food Science and Technology
- University of California
- Davis
- USA
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16
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Nørskov NP, Jensen SK, Sørensen MT. Robust and highly sensitive micro liquid chromatography-tandem mass spectrometry method for analyses of polar pesticides (glyphosate, aminomethylphosfonic acid, N-acetyl glyphosate and N-acetyl aminomethylphosfonic acid) in multiple biological matrices. J Chromatogr A 2019; 1605:360343. [PMID: 31307794 DOI: 10.1016/j.chroma.2019.06.064] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/28/2019] [Accepted: 06/29/2019] [Indexed: 11/24/2022]
Abstract
Glyphosate is the most used herbicide in agriculture. To monitor glyphosate exposure, analytical methods have to fulfill requirements with regard to sensitivity, reproducibility, ease of handling/high-throughput and applicability to multiple biological matrices. Furthermore, the methods have to include the degradation product of glyphosate, aminomethylphosfonic acid (AMPA) and preferably metabolites of glyphosate and AMPA, N-acetyl AMPA and N-acetyl glyphosate. Majority of the published methods for glyphosate and AMPA require derivatization to be able to achieve high sensitivity. In this work, we present highly sensitive microLC-MS/MS method for simultaneous quantification of glyphosate, AMPA, N-acetyl AMPA and N-acetyl glyphosate in multiple biological matrices without derivatization. The combination of simple sample clean-up procedures for simultaneous handling of 96 sample and short chromatographic run of only 3.4 min, meets the requirements for high-throughput methods. Simple mobile phase of water containing formic and medronic acids and isocratic run provided robust chromatographic separation on hypercarb column. The use of micro-flow system decreased the background noise, increasing the sensitivity. Achieved Low Limits of Quantification (LOQs) for liquid samples (plasma/serum/urine) were 0.00005 mg L-1 and 0.0001 mg kg-1 for solid samples (grain and soybean based feed/stomach/gizzard/intestinal content), which is more than 100 time more sensitive compared to QuPPe-Method. The method was validated in representative matrices with minimum of five fortification levels, six measurements per spiked concentration and three batches. All the samples were spiked with corresponding internal standards for all four analytes before sample clean-up procedures, ensuring high accuracy and precision. Recoveries for plasma/serum ranged between 86-108%, urine 93-120%, feed 91-115% and stomach/gizzard/intestinal content 92-110% with precision below 20%. The method's applicability was tested on 2000 samples measured during one year period.
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Affiliation(s)
- Natalja P Nørskov
- Department of Animal Science, Aarhus University, Blichers Alle 20, DK-8830, Denmark.
| | - Søren Krogh Jensen
- Department of Animal Science, Aarhus University, Blichers Alle 20, DK-8830, Denmark
| | - Martin Tang Sørensen
- Department of Animal Science, Aarhus University, Blichers Alle 20, DK-8830, Denmark
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17
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Stergiadis S, Nørskov NP, Purup S, Givens I, Lee MRF. Comparative Nutrient Profiling of Retail Goat and Cow Milk. Nutrients 2019; 11:E2282. [PMID: 31554167 PMCID: PMC6835441 DOI: 10.3390/nu11102282] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 09/09/2019] [Accepted: 09/16/2019] [Indexed: 02/01/2023] Open
Abstract
Goat milk is globally consumed but nutritional profiling at retail level is scarce. This study compared the nutrient composition of retail cow and goat milk (basic solids, fatty acids, minerals, and phytoestrogens) throughout the year and quantified the potential implications on the consumers' nutrient intakes. When compared to cow milk, goat milk demonstrated nutritionally desirable traits, such as lower concentrations of C12:0, C14:0, C16:0 and Na: K ratio, and the higher concentrations of cis polyunsaturated fatty acids (PUFA), eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), isoflavones, B, Cu, Mg, Mn, P and I, although the latter may be less desirable in cases of high milk intakes. However, in contrast with nutritional targets, it had lower concentrations of omega-3 PUFA, vaccenic acid, lignans, Ca, S and Zn. The extent of these differences was strongly influenced by season and may demonstrate a combination of differences on intrinsic species metabolism, and farm breeding/husbandry practices.
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Affiliation(s)
- Sokratis Stergiadis
- Department of Animal Sciences, University of Reading, Agriculture Building, P.O. Box 237, Earley Gate, Reading RG6 6AR, UK.
| | - Natalja P Nørskov
- Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark.
| | - Stig Purup
- Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark.
| | - Ian Givens
- Institute for Food Nutrition and Health, University of Reading, Agriculture Building, P.O. Box 237, Earley Gate, Reading RG6 6AR, UK.
| | - Michael R F Lee
- Rothamsted Research, North Wyke, Okehampton, Devon EX20 2SB, UK.
- Bristol Veterinary School, University of Bristol, Langford, Somerset BS40 5DU, UK.
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18
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Eriksen AK, Kyrø C, Nørskov NP, Frederiksen K, Bach Knudsen KE, Overvad K, Landberg R, Tjønneland A, Olsen A. Pre-diagnostic plasma enterolactone concentrations are associated with lower mortality among individuals with type 2 diabetes: a case-cohort study in the Danish Diet, Cancer and Health cohort. Diabetologia 2019; 62:959-969. [PMID: 30963187 PMCID: PMC6509069 DOI: 10.1007/s00125-019-4854-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 02/27/2019] [Indexed: 01/18/2023]
Abstract
AIMS/HYPOTHESIS The phytoestrogen enterolactone is a gut microbiota-derived metabolite of plant lignans with suggested beneficial properties for health. In the current study, we investigated the association between pre-diagnostic plasma enterolactone concentrations and mortality among individuals diagnosed with type 2 diabetes. METHODS In a population of people diagnosed with diabetes, nested within the Danish Diet, Cancer and Health cohort, we conducted a case-cohort study including a random sample of n = 450 cases (deceased) and a randomly selected subcohort of n = 850 (in total n = 617 deaths). Information on diagnosis, vital status and cause of death was obtained from Danish registers. Cox proportional hazard models with special weighting were applied to assess all-cause and cause-specific mortality. RESULTS The median enterolactone concentration of the current population was low, 10.9 nmol/l (5th percentile to 95th percentile: 1.3-59.6), compared with previously reported concentrations from the Diet, Cancer and Health cohort. Pre-diagnostic enterolactone concentrations were associated with lower all-cause mortality when assessed linearly per doubling in concentration (log2) (HR 0.91 [95% CI 0.85, 0.96]) and according to quartiles (HR 0.63 [95% CI 0.48, 0.84]) for the highest quartile of enterolactone compared with the lowest quartile. For cause-specific mortality, only death from diabetes (registered as underlying cause of death) reached statistical significance. CONCLUSIONS/INTERPRETATION Based on this large cohort of people with diabetes with detailed and complete baseline and follow-up information, pre-diagnostic enterolactone concentrations were inversely associated with mortality. To our knowledge, this is the first study on enterolactone and type 2 diabetes mortality. Our findings call for further exploration of enterolactone in type 2 diabetes management.
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Affiliation(s)
- Anne K Eriksen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100, Copenhagen, Denmark.
| | - Cecilie Kyrø
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100, Copenhagen, Denmark
| | | | - Kirsten Frederiksen
- Unit of Statistics and Pharmacoepidemiology, Danish Cancer Society Research Center, Copenhagen, Denmark
| | | | - Kim Overvad
- Department of Public Health, Section for Epidemiology, Aarhus University, Aarhus C, Denmark
| | - Rikard Landberg
- Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96, Gothenburg, Sweden.
| | - Anne Tjønneland
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100, Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Anja Olsen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100, Copenhagen, Denmark
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19
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Nørskov NP, Givens I, Purup S, Stergiadis S. Concentrations of phytoestrogens in conventional, organic and free-range retail milk in England. Food Chem 2019; 295:1-9. [PMID: 31174736 DOI: 10.1016/j.foodchem.2019.05.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/24/2019] [Accepted: 05/09/2019] [Indexed: 02/08/2023]
Abstract
The effect of dairy management system (conventional, CNV; organic, ORG; free-range, FRG) and month on retail milk phytoestrogen composition was assessed for 12 consecutive months. ORG milk contained more secoisolariciresinol, matairesinol, lariciresinol, sum of plant lignans, daidzein, genistein, formononetin, naringenin, equol, sum of isoflavones and coumestrol, than CNV and FRG milk. This may be explained by the higher supply of pasture, and grazed or ensiled clover, in ORG dairy diets. Seasonal variation in milk phytoestrogen concentrations was higher for ORG than CNV and FRG systems. Phytoestrogen composition did not vary between FRG and CNV milk. Consuming organic milk can increase intake of potentially beneficial lignans and isoflavonoids, and in particular equol; but, any effects on human health from such milk compositional differences cannot be implied.
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Affiliation(s)
- Natalja P Nørskov
- Aarhus University, Department of Animal Science, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Ian Givens
- University of Reading, Institute for Food Nutrition and Health, Agriculture Building, P.O. Box 237, Earley Gate, Reading RG6 6AR, United Kingdom
| | - Stig Purup
- Aarhus University, Department of Animal Science, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Sokratis Stergiadis
- University of Reading, School of Agriculture, Policy and Development, Animal, Dairy and Food Chain Sciences, Agriculture Building, P.O. Box 237, Earley Gate, Reading RG6 6AR, United Kingdom.
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20
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Bolvig AK, Nørskov NP, van Vliet S, Foldager L, Curtasu MV, Hedemann MS, Sørensen JF, Lærke HN, Bach Knudsen KE. Rye Bran Modified with Cell Wall-Degrading Enzymes Influences the Kinetics of Plant Lignans but Not of Enterolignans in Multicatheterized Pigs. J Nutr 2017; 147:2220-2227. [PMID: 28978677 DOI: 10.3945/jn.117.258483] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/18/2017] [Accepted: 09/12/2017] [Indexed: 11/14/2022] Open
Abstract
Background: Whole-grain intake is associated with a lower risk of chronic Western-style diseases, possibly brought about by the high concentration of phytochemicals, among them plant lignans (PLs), in the grains.Objective: We studied whether treatment of rye bran with cell wall-degrading enzymes changed the solubility and kinetics of PLs in multicatheterized pigs.Methods: Ten female Duroc × Danish Landrace × Yorkshire pigs (60.3 ± 2.3 kg at surgery) fitted with permanent catheters were included in an incomplete crossover study. The pigs were fed 2 experimental diets for 1-7 d. The diets were rich in PLs and based on nontreated lignan-rich [LR; lignan concentration: 20.2 mg dry matter (DM)/kg] or enzymatically treated lignan-rich (ENZLR; lignan concentration: 27.8 mg DM/kg) rye bran. Plasma concentrations of PLs and enterolignans were quantified with the use of targeted LC-tandem mass spectrometry. Data were log transformed and analyzed with mixed-effects, 1-compartment, and asymptotic regression models.Results: The availability of PLs was 38% greater in ENZLR than in LR, and the soluble fraction of PLs was 49% in ENZLR compared with 35% in LR diets. PLs appeared in the circulation 30 min after intake of both the ENZLR and LR diets. Postprandially, consumption of ENZLR resulted in a 4-times-greater (P < 0.0001) plasma PL concentration compared with LR. The area under the curve (AUC) measured 0-360 min after ENZLR intake was ∼2 times higher than after LR intake. A 1-compartment model could describe the postprandial increase in plasma concentration after ENZLR intake, whereas an asymptotic regression model described the plasma concentrations after LR intake. Despite increased available and soluble PLs, ENZLR did not increase plasma enterolignans.Conclusion: The modification of rye bran with cell wall-degrading enzymes resulted in significantly greater plasma concentrations of PLs and the 4-h AUC, particularly syringaresinol, in multicatheterized pigs.
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Affiliation(s)
| | | | | | - Leslie Foldager
- Department of Animal Science and.,Bioinformatics Research Centre, Faculty of Science and Technology, Aarhus University, Aarhus, Denmark; and
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21
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Bolvig AK, Nørskov NP, Hedemann MS, Foldager L, McCarthy-Sinclair B, Marco ML, Lærke HN, Bach Knudsen KE. Effect of Antibiotics and Diet on Enterolactone Concentration and Metabolome Studied by Targeted and Nontargeted LC-MS Metabolomics. J Proteome Res 2017; 16:2135-2150. [PMID: 28294620 DOI: 10.1021/acs.jproteome.6b00942] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
High plant lignan intake is associated with a number of health benefits, possibly induced by the lignan metabolite enterolactone (ENL). The gut microbiota plays a crucial role in converting dietary lignans into ENL, and epidemiological studies have shown that use of antibiotics is associated with lower levels of ENL. Here we investigate the link between antibiotic use and lignan metabolism in pigs using LC-MS/MS. The effect of lignan intake and antibiotic use on the gut microbial community and the pig metabolome is studied by 16S rRNA sequencing and nontargeted LC-MS. Treatment with antibiotics resulted in substantially lower concentrations of ENL compared with concentrations detected in untreated animals, whereas the plasma concentrations of plant lignans were unchanged. Both diet and antibiotic treatment affected the clustering of urinary metabolites and significantly altered the proportions of taxa in the gut microbiota. Diet, but not antibiotic treatment, affected the plasma lipid profile, and a lower concentration of LDL cholesterol was observed in the pigs fed a high lignan diet. This study provides solid support for the associations between ENL concentrations and use of antibiotics found in humans and indicates that the lower ENL concentration may be a consequence of the ecological changes in the microbiota.
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Affiliation(s)
- Anne K Bolvig
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark
| | - Natalja P Nørskov
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark
| | - Mette S Hedemann
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark
| | - Leslie Foldager
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark.,Bioinformatics Research Centre, Faculty of Science and Technology, Aarhus University , C.F. Møllers Allé 8, DK-8000 Aarhus C, Denmark
| | - Brendan McCarthy-Sinclair
- Robert Mondavi Institute, University of California, Davis , 392 Old Davis Road, Davis, California 95616, United States
| | - Maria L Marco
- Robert Mondavi Institute, University of California, Davis , 392 Old Davis Road, Davis, California 95616, United States
| | - Helle N Lærke
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark
| | - Knud E Bach Knudsen
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark
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22
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Bach Knudsen KE, Nørskov NP, Bolvig AK, Hedemann MS, Laerke HN. Dietary fibers and associated phytochemicals in cereals. Mol Nutr Food Res 2017; 61. [DOI: 10.1002/mnfr.201600518] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/20/2016] [Accepted: 10/24/2016] [Indexed: 12/18/2022]
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23
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Nørskov NP, Knudsen KEB. Validated LC-MS/MS Method for the Quantification of Free and Bound Lignans in Cereal-Based Diets and Feces. J Agric Food Chem 2016; 64:8343-8351. [PMID: 27740756 DOI: 10.1021/acs.jafc.6b03452] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Despite the extensive literature describing the biological effects of phenolic compounds from cereals, little is known about their bioaccessibility in the food matrix. This paper describes a validated LC-MS/MS method for the quantification of free and total content (free + bound) of eight plant lignans (matairesinol, hydroxymatairesinol, secoisolariciresinol, lariciresinol, isolariciresinol, syringaresinol, medioresinol, and pinoresinol) and two enterolignans (enterodiol and enterolactone) in cereal-based diets/bread and feces. The method consisted of alkaline methanolic extraction combined with enzymatic hydrolyses, for the measurement of the total concentration of lignans, and methanolic extraction combined with enzymatic hydrolysis, for the measurement of free lignans, followed by solid phase extraction (SPE). The strength of this LC-MS/MS method is that it can be combined with different types of samples, because the SPE and LC-MS/MS platforms are similar to our previously published method for plasma and urine.
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Affiliation(s)
- Natalja P Nørskov
- Department of Animal Science, AU-Foulum, Aarhus University , Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Knud Erik Bach Knudsen
- Department of Animal Science, AU-Foulum, Aarhus University , Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
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24
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Bolvig AK, Kyrø C, Nørskov NP, Eriksen AK, Christensen J, Tjønneland A, Knudsen KEB, Olsen A. Use of antibiotics is associated with lower enterolactone plasma concentration. Mol Nutr Food Res 2016; 60:2712-2721. [PMID: 27500753 DOI: 10.1002/mnfr.201600566] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/01/2016] [Accepted: 08/02/2016] [Indexed: 01/11/2023]
Abstract
SCOPE High enterolactone levels may have health benefits in relation to risk of noncommunicable diseases. Enterolactone is produced by the colonic microbiota after intake of lignans and treatment with antimicrobials may result in altered enterolactone production. This study investigates the association between antibiotic use and enterolactone concentration. METHODS AND RESULTS Using LC-MS/MS, enterolactone concentrations were quantified in plasma samples from 2237 participants from the Diet, Cancer and Health cohort. The participants were healthy at enrollment, but were later diagnosed with cancer. At enrollment, participants had blood drawn and completed a food frequency questionnaire and lifestyle questionnaire. Antibiotic use was assessed as reimbursed antibiotic prescriptions up to 12 months before enrollment. Antibiotic use ≤3 months before enrollment was associated with a 41% (Δcrude : -41; 95% CI: -52, -28) lower enterolactone concentration in women and 12% in men (Δcrude : -12; 95% CI: -31, 11), while antibiotic use >3-12 months before enrollment was associated with 26% lower enterolactone in women (Δcrude : -26; 95% CI: -37, -14) and 14% in men (Δcrude : -14; 95% CI: -28, 1). CONCLUSION Use of antibiotics up to 12 months before enrollment was associated with lower plasma enterolactone levels, especially among women.
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Affiliation(s)
- Anne K Bolvig
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | - Cecilie Kyrø
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | | | - Anne K Eriksen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Jane Christensen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Anne Tjønneland
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
| | | | - Anja Olsen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Copenhagen, Denmark
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Nørskov NP, Kyrø C, Olsen A, Tjønneland A, Knudsen KEB. High-Throughput LC-MS/MS Method for Direct Quantification of Glucuronidated, Sulfated, and Free Enterolactone in Human Plasma. J Proteome Res 2016; 15:1051-8. [PMID: 26809233 DOI: 10.1021/acs.jproteome.5b01117] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sulfation and glucuronidation constitute a major pathway in humans and may play an important role in biological activity of metabolites including the enterolignan, enterolactone. Because the aromatic structure of enterolactone has similarities to steroid metabolites, it was hypothesized that enterolactone may protect against hormone-dependent cancers. This led to numerous epidemiological studies. In this context, there has been a demand for rapid, sensitive, high-throughput methods to measure enterolactone in biofluids. Different methods have been developed using GC-MS, HPLC, LC-MS/MS and a fluoroimmunoassay; however, most of these methods measure the total concentration of enterolactone, without any specification of its conjugation pattern. Here for the first time we present a high-throughput LC-MS/MS method to quantify enterolactone in its intact form as glucuronide, sulfate, and free enterolactone. The method has shown good accuracy and precision at low concentration and very high sensitivity, with LLOQ for enterolactone sulfate at 16 pM, enterolactone glucuronide at 26 pM, and free enterolactone at 86 pM. The short run time of 2.6 min combined with simple sample clean up and high sensitivity make this method attractive for the high-throughput of samples needed for epidemiological studies. Finally, we have adapted the new method to quantify enterolactone and its conjugates in 3956 plasma samples from an epidemiological study. We found enterolactone glucuronide to be the major conjugation form and that conjugation pattern was similar between men and women.
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Affiliation(s)
- Natalja P Nørskov
- Aarhus University , Department of Animal Science, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Cecilie Kyrø
- Danish Cancer Society Research Center , Strandboulevarden 49, DK-2100 Copenhagen, Denmark
| | - Anja Olsen
- Danish Cancer Society Research Center , Strandboulevarden 49, DK-2100 Copenhagen, Denmark
| | - Anne Tjønneland
- Danish Cancer Society Research Center , Strandboulevarden 49, DK-2100 Copenhagen, Denmark
| | - Knud Erik Bach Knudsen
- Aarhus University , Department of Animal Science, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
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Nielsen TS, Theil PK, Purup S, Nørskov NP, Bach Knudsen KE. Effects of Resistant Starch and Arabinoxylan on Parameters Related to Large Intestinal and Metabolic Health in Pigs Fed Fat-Rich Diets. J Agric Food Chem 2015; 63:10418-10430. [PMID: 26566722 DOI: 10.1021/acs.jafc.5b03372] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study compared the effects of a resistant starch (RS)-rich, arabinoxylan (AX)-rich, or low-DF Western-style control diet (all high-fat) on large intestinal gene expression, adiposity, and glycemic response parameters in pigs. Animals were slaughtered after 3 weeks of treatment. Plasma butyrate concentration was higher following the high-DF diets, whereas plasma glucose, insulin, and insulin resistance increased after 3 weeks irrespective of diet. The mRNA abundance in the large intestine of genes involved in nutrient transport, immune response, and intestinal permeability was affected by segment (cecum, proximal, mid or distal colon) and some genes also by diet. In contrast, there was no diet-induced effect on adipose mRNA abundance or adipocyte size. Overall, a high level of RS or AX did not demonstrate strong beneficial effects on large intestinal gene expression as indicators of colonic health or glycemic response parameters when included in a high-fat diet for pigs as a model of healthy humans.
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Affiliation(s)
| | | | - Stig Purup
- Department of Animal Science, Aarhus University , Tjele, Denmark
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Nørskov NP, Olsen A, Tjønneland A, Bolvig AK, Lærke HN, Knudsen KEB. Targeted LC-MS/MS Method for the Quantitation of Plant Lignans and Enterolignans in Biofluids from Humans and Pigs. J Agric Food Chem 2015; 63:6283-6292. [PMID: 26077973 DOI: 10.1021/acs.jafc.5b01275] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Lignans have gained nutritional interest due to their promising role in the prevention of lifestyle diseases. However, epidemiological studies are in need of more evidence to link the intake of lignans to this promising role. In this context, it is necessary to study large population groups to obtain sufficient statistical power. Therefore, there is a demand for fast, sensitive, and accurate methods for quantitation with high throughput of samples. This paper presents a validated LC-MS/MS method for the quantitation of eight plant lignans (matairesinol, hydroxymatairesinol, secoisolariciresinol, lariciresinol, isolariciresinol, syringaresinol, medioresinol, and pinoresinol) and two enterolignans (enterodiol and enterolactone) in both human and pig plasma and urine. The method showed high selectivity and sensitivity allowing quantitation of lignans in the range of 0.024-100 ng/mL and with a run time of only 4.8 min per sample. The method was successfully applied to quantitate lignans in biofluids from ongoing studies with humans and pigs.
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Affiliation(s)
- Natalja P Nørskov
- †Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Anja Olsen
- §Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen, Denmark
| | - Anne Tjønneland
- §Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen, Denmark
| | - Anne Katrine Bolvig
- †Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Helle Nygaard Lærke
- †Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
| | - Knud Erik Bach Knudsen
- †Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, P.O. Box 50, DK-8830 Tjele, Denmark
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Nørskov NP, Hedemann MS, Theil PK, Fomsgaard IS, Laursen BB, Knudsen KEB. Phenolic acids from wheat show different absorption profiles in plasma: a model experiment with catheterized pigs. J Agric Food Chem 2013; 61:8842-8850. [PMID: 23971623 DOI: 10.1021/jf4002044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The concentration and absorption of the nine phenolic acids of wheat were measured in a model experiment with catheterized pigs fed whole grain wheat and wheat aleurone diets. Six pigs in a repeated crossover design were fitted with catheters in the portal vein and mesenteric artery to study the absorption of phenolic acids. The difference between the artery and the vein for all phenolic acids was small, indicating that the release of phenolic acids in the large intestine was not sufficient to create a porto-arterial concentration difference. Although, the porto-arterial difference was small, their concentrations in the plasma and the absorption profiles differed between cinnamic and benzoic acid derivatives. Cinnamic acids derivatives such as ferulic acid and caffeic acid had maximum plasma concentration of 82 ± 20 and 200 ± 7 nM, respectively, and their absorption profiles differed depending on the diet consumed. Benzoic acid derivatives showed low concentration in the plasma (<30 nM) and in the diets. The exception was p-hydroxybenzoic acid, with a plasma concentration (4 ± 0.4 μM), much higher than the other plant phenolic acids, likely because it is an intermediate in the phenolic acid metabolism. It was concluded that plant phenolic acids undergo extensive interconversion in the colon and that their absorption profiles reflected their low bioavailability in the plant matrix.
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Affiliation(s)
- Natalja P Nørskov
- Department of Animal Science, Faculty of Science and Technology, Aarhus University , Blichers Allé 20, PO Box 50, DK-8830 Tjele, Denmark
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Nørskov NP, Hedemann MS, Lærke HN, Knudsen KEB. Multicompartmental nontargeted LC-MS metabolomics: explorative study on the metabolic responses of rye fiber versus refined wheat fiber intake in plasma and urine of hypercholesterolemic pigs. J Proteome Res 2013; 12:2818-32. [PMID: 23596967 DOI: 10.1021/pr400164b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A multicompartmental nontargeted LC-MS metabolomics approach was used to study the metabolic responses on plasma and urine of hypercholesterolemic pigs after consumption of diets with contrasting dietary fiber composition (whole grain rye with added rye bran versus refined wheat). To study the metabolic responses, we performed a supervised multivariate data analyses used for pattern recognition, which revealed marked effects of the diets on both plasma and urine metabolic profiles. Diverse pools of metabolites were responsible for the discrimination between the diets. Elevated levels of phenolic compounds and dicarboxylic acids were detected in urine of pigs after rye consumption compared to refined wheat. Furthermore, consumption of rye was characterized by lower levels of linoleic acid derived oxylipins and cholesterol in the plasma metabolic profiles. These results indicate that higher consumption of nonrefined dietary fiber is reflected in higher excretion of phenolic compounds and dicarboxylic acids in urine and lower levels of linoleic acid derived oxylipins and cholesterol in plasma, which can be linked to beneficial health effects of rye components. On the other hand, pro-inflammatory lipid mediators were detected in higher concentration after rye consumption compared to refined wheat, which is opposite to what would be expected. These may indicate that even though a positive lowering effect with respect to cholesterol and fatty acids was achieved, this effect of rye dietary fiber was not sufficient to prevent inflammation in pigs. Moreover, we performed an alignment of the metabolic profiles between the breads consumed by pigs, plasma, and urine with the purpose to follow the metabolic fate of the compounds and to identify their pathways. One metabolite was identified in all three compartments, 16 metabolites were similar between bread and plasma, 3 were similar between plasma and urine, and 2 were similar between bread and urine. The use of multicompartmental metabolomics offered higher order information, including intercompartment relationships, and provided novel targets for future research.
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Affiliation(s)
- Natalja P Nørskov
- Department of Animal Science, Aarhus University, AU-Foulum, Blichers Alle 20, PO Box 50, DK-8830 Tjele, Denmark
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