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Hartung NM, Mainka M, Pfaff R, Kuhn M, Biernacki S, Zinnert L, Schebb NH. Development of a quantitative proteomics approach for cyclooxygenases and lipoxygenases in parallel to quantitative oxylipin analysis allowing the comprehensive investigation of the arachidonic acid cascade. Anal Bioanal Chem 2023; 415:913-933. [PMID: 36683060 PMCID: PMC9883352 DOI: 10.1007/s00216-022-04489-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 12/07/2022] [Accepted: 12/14/2022] [Indexed: 01/24/2023]
Abstract
Oxylipins derived from the cyclooxygenase (COX) and lipoxygenase (LOX) pathways of the arachidonic acid (ARA) cascade are essential for the regulation of the inflammatory response and many other physiological functions. Comprehensive analytical methods comprised of oxylipin and protein abundance analysis are required to fully understand mechanisms leading to changes within these pathways. Here, we describe the development of a quantitative multi-omics approach combining liquid chromatography tandem mass spectrometry-based targeted oxylipin metabolomics and proteomics. As the first targeted proteomics method to cover these pathways, it enables the quantitative analysis of all human COX (COX-1 and COX-2) and relevant LOX pathway enzymes (5-LOX, 12-LOX, 15-LOX, 15-LOX-2, and FLAP) in parallel to the analysis of 239 oxylipins with our targeted oxylipin metabolomics method from a single sample. The detailed comparison between MRM3 and classical MRM-based detection in proteomics showed increased selectivity for MRM3, while MRM performed better in terms of sensitivity (LLOQ, 16-122 pM vs. 75-840 pM for the same peptides), linear range (up to 1.5-7.4 μM vs. 4-368 nM), and multiplexing capacities. Thus, the MRM mode was more favorable for this pathway analysis. With this sensitive multi-omics approach, we comprehensively characterized oxylipin and protein patterns in the human monocytic cell line THP-1 and differently polarized primary macrophages. Finally, the quantification of changes in protein and oxylipin levels induced by lipopolysaccharide stimulation and pharmaceutical treatment demonstrates its usefulness to study molecular modes of action involved in the modulation of the ARA cascade.
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Affiliation(s)
- Nicole M Hartung
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Malwina Mainka
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Rebecca Pfaff
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Michael Kuhn
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Sebastian Biernacki
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Lilli Zinnert
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Nils Helge Schebb
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany.
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2
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Koch E, Bagci M, Kuhn M, Hartung NM, Mainka M, Rund KM, Schebb NH. GC-MS analysis of oxysterols and their formation in cultivated liver cells (HepG2). Lipids 2023; 58:41-56. [PMID: 36195466 DOI: 10.1002/lipd.12360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 08/09/2022] [Accepted: 09/09/2022] [Indexed: 02/04/2023]
Abstract
Oxysterols play a key role in many (patho)physiological processes and they are potential biomarkers for oxidative stress in several diseases. Here we developed a rapid gas chromatographic-mass spectrometry-based method for the separation and quantification of 11 biologically relevant oxysterols bearing hydroxy, epoxy, and dihydroxy groups. Efficient chromatographic separation (resolution ≥ 1.9) was achieved using a medium polarity 35%-diphenyl/65%-dimethyl polysiloxane stationary phase material (30 m × 0.25 mm inner diameter and 0.25 μm film thickness). Based on thorough analysis of the fragmentation during electron ionization we developed a strategy to deduce structural information of the oxysterols. Optimized sample preparation includes (i) extraction with a mixture of n-hexane/iso-propanol, (ii) removal of cholesterol by solid phase extraction with unmodified silica, and (iii) trimethylsilylation. The method was successfully applied on the analysis of brain samples, showing consistent results with previous studies and a good intra- and interday precision of ≤20%. Finally, we used the method for the investigation of oxysterol formation during oxidative stress in HepG2 cells. Incubation with tert-butyl hydroperoxide led to a massive increase in free radical formed oxysterols (7-keto-chol > 7β-OH-chol >> 7α-OH-chol), while 24 h incubation with the glutathione peroxidase 4 inhibitor RSL3 showed no increase in oxidative stress based on the oxysterol pattern. Overall, the new method described here enables the robust analysis of a biologically meaningful pattern of oxysterols with high sensitivity and precision allowing us to gain new insights in the biological formation and role of oxysterols.
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Affiliation(s)
- Elisabeth Koch
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Mustafa Bagci
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Michael Kuhn
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Nicole M Hartung
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Malwina Mainka
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Katharina M Rund
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Nils Helge Schebb
- Chair of Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
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3
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Fabian J, Mergemeier K, Lehr M. Evaluation of inhibitors of the arachidonic acid cascade with intact platelets using an on-line dilution and on-line solid phase extraction HPLC-MS method. Prostaglandins Other Lipid Mediat 2021; 155:106551. [PMID: 33940184 DOI: 10.1016/j.prostaglandins.2021.106551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 10/21/2022]
Abstract
An automatic on-line dilution/on-line solid phase extraction (SPE) system has been developed for the detection of metabolites of the arachidonic acid cascade in platelets. The method allows the direct injection of larger quantities of centrifugates from cell suspensions previously treated with an equal volume of an acetonitrile/methanol mixture for protein precipitation. The method was used to study the effect of inhibitors of platelet arachidonic acid cascade enzymes (cytosolic phospholipase A2α, cyclooxygenase-1, thromboxane synthase, 12-lipoxygenase) and related targets (cyclooxygenase-2, microsomal prostaglandin E synthase-1, 5-lipoxygenase) in intact platelets after stimulation with calcium ionophore A23187. In addition to enzyme inhibition, the cell-damaging properties of the test compounds was determined by measuring the release of serotonin from the platelets into the incubation buffer.
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Affiliation(s)
- Jörg Fabian
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149, Münster, Germany
| | - Kira Mergemeier
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149, Münster, Germany
| | - Matthias Lehr
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Corrensstrasse 48, D-48149, Münster, Germany.
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4
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Sun Y, Wu D, Zeng W, Chen Y, Guo M, Lu B, Li H, Sun C, Yang L, Jiang X, Gao Q. The Role of Intestinal Dysbacteriosis Induced Arachidonic Acid Metabolism Disorder in Inflammaging in Atherosclerosis. Front Cell Infect Microbiol 2021; 11:618265. [PMID: 33816331 PMCID: PMC8012722 DOI: 10.3389/fcimb.2021.618265] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 01/28/2021] [Indexed: 12/12/2022] Open
Abstract
Background Aging induced chronic systemic inflammatory response is an important risk factor for atherosclerosis (AS) development; however, the detailed mechanism is yet to be elucidated. Objective To explore the underlying mechanism of how aging aggravates AS advancement. Methods A young (five-week-old, YM) and aged group (32-week-old, OM) male apoE-/- mice with a high fat diet were used as models, and age-matched male wild-type C57BL/6J (WT) mice were used as controls. AS lesion size, serum lipid profile, cytokines, and gut microbiota-derived LPS were analyzed after 32 weeks of diet intervention. A correlation analysis between the 16S rRNA sequencing of the feces and serum metabolomics profiles was applied to examine the effect of their interactions on AS. Results ApoE-/- mice developed severe atherosclerosis and inflammation in the aorta compared to the WT groups, and aged apoE-/- mice suffered from a more severe AS lesion than their younger counterparts and had low-grade systemic inflammation. Furthermore, increased levels of serum LPS, decreased levels of SCFAs production, as well as dysfunction of the ileal mucosal barrier were detected in aged mice compared with their younger counterparts. There were significant differences in the intestinal flora composition among the four groups, and harmful bacteria such as Lachnospiraceae_FCS020, Ruminococcaceae_UCG-009, Acetatifactor, Lachnoclostridium and Lactobacillus_gasseri were significantly increased in the aged apoE-/- mice compared with the other groups. Concurrently, metabolomics profiling revealed that components involved in the arachidonic acid (AA) metabolic pathway such as 20-HETE, PGF2α, arachidonic acid, and LTB4 were significantly higher in the aged AS group than in the other groups. This suggested that metabolic abnormalities and disorders of intestinal flora occurred in AS mice. Conclusions Aging not only altered the gut microbiome community but also substantially disturbed metabolic conditions. Our results confirm that AA metabolism is associated with the imbalance of the intestinal flora in the AS lesions of aged mice. These findings may offer new insights regarding the role of gut flora disorders and its consequent metabolite changed in inflammaging during AS development.
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Affiliation(s)
- Yingxin Sun
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Danbin Wu
- Department of Rheumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.,First Clinical Medical School, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wenyun Zeng
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yefei Chen
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, China
| | - Maojuan Guo
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Bin Lu
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Huhu Li
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Chun Sun
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Lin Yang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xijuan Jiang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Qing Gao
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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5
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Greite R, Derlin K, Hensen B, Thorenz A, Rong S, Chen R, Hellms S, Jang MS, Bräsen JH, Meier M, Willenberg I, Immenschuh S, Haller H, Luft FC, Panigrahy D, Hwang SH, Hammock BD, Schebb NH, Gueler F. Early antihypertensive treatment and ischemia-induced acute kidney injury. Am J Physiol Renal Physiol 2020; 319:F563-F570. [PMID: 32799675 DOI: 10.1152/ajprenal.00078.2020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Acute kidney injury (AKI) frequently complicates major surgery and can be associated with hypertension and progress to chronic kidney disease, but reports on blood pressure normalization in AKI are conflicting. In the present study, we investigated the effects of an angiotensin-converting enzyme inhibitor, enalapril, and a soluble epoxide hydrolase inhibitor, 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl)urea (TPPU), on renal inflammation, fibrosis, and glomerulosclerosis in a mouse model of ischemia-reperfusion injury (IRI)-induced AKI. Male CD1 mice underwent unilateral IRI for 35 min. Blood pressure was measured by tail cuff, and mesangial matrix expansion was quantified on methenamine silver-stained sections. Renal perfusion was assessed by functional MRI in vehicle- and TPPU-treated mice. Immunohistochemistry was performed to study the severity of AKI and inflammation. Leukocyte subsets were analyzed by flow cytometry, and proinflammatory cytokines were analyzed by quantitative PCR. Plasma and tissue levels of TPPU and lipid mediators were analyzed by liquid chromatography mass spectrometry. IRI resulted in a blood pressure increase of 20 mmHg in the vehicle-treated group. TPPU and enalapril normalized blood pressure and reduced mesangial matrix expansion. However, inflammation and progressive renal fibrosis were severe in all groups. TPPU further reduced renal perfusion on days 1 and 14. In conclusion, early antihypertensive treatment worsened renal outcome after AKI by further reducing renal perfusion despite reduced glomerulosclerosis.
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Affiliation(s)
- Robert Greite
- Nephrology, Hannover Medical School, Hannover, Germany
| | - Katja Derlin
- Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Bennet Hensen
- Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Anja Thorenz
- Nephrology, Hannover Medical School, Hannover, Germany
| | - Song Rong
- Nephrology, Hannover Medical School, Hannover, Germany
| | - Rongjun Chen
- Nephrology, Hannover Medical School, Hannover, Germany
| | - Susanne Hellms
- Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Mi-Sun Jang
- Nephrology, Hannover Medical School, Hannover, Germany
| | | | - Martin Meier
- Imaging Center, Institute of Laboratory Animal Sciences, Hannover Medical School, Hannover, Germany
| | - Ina Willenberg
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | | | | | - Friedrich C Luft
- Experimental and Clinical Research Center, Max-Delbrück Center/Charité, Berlin, Germany
| | - Dipak Panigrahy
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Sung Hee Hwang
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, California
| | - Bruce D Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, California
| | - Nils Helge Schebb
- Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Faikah Gueler
- Nephrology, Hannover Medical School, Hannover, Germany
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6
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Huang ZA, Scotland KB, Li Y, Tan J, Kung SHY, Chew BH, Chen DDY, Lange D. Determination of urinary prostaglandin E 2 as a potential biomarker of ureteral stent associated inflammation. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1145:122107. [PMID: 32315976 DOI: 10.1016/j.jchromb.2020.122107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/04/2020] [Accepted: 04/04/2020] [Indexed: 12/21/2022]
Abstract
Ureteral stents are the most widely used surgical implant in urology. However, they may cause adverse effects to patients, including pain, discomfort, and inflammation. In this work, the inflammatory effect of stent placement and the associated elevation of cyclooxygenase-2 (COX-2) expression were observed. Furthermore, a capillary electrophoresis mass spectrometry (CE-MS) based approach was subsequently developed to quantify urinary prostaglandin E2 (PGE2), a COX-2 metabolite known to contribute to inflammatory renal diseases, to further interrogate the role of this pathway. Urine samples were cleaned and preconcentrated by solid-phase extraction (SPE), and an on-line sample stacking method was used for the enrichment of analytes. The accuracy, precision, and specificity of this method were validated. Standard addition methods were performed to assess the reliability of using deuterated internal standards (IS) in compensating the remaining matrix effect after SPE as well as the detector fluctuation. Through the analysis of 32 pig urine samples, a statistically significant increase of PGE2 was observed in the stented group compared to the unstented (P = 0.01) and the recovered (P = 0.004) groups. This work determined that stent placement may contribute to COX-2-dependent inflammation and developed a reliable CE-MS based methodology to quantify PGE2 in stented individuals that may further understand the biology of stent-associated inflammation and inform urologic patient management.
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Affiliation(s)
- Zi-Ao Huang
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Kymora B Scotland
- Department of Urology, University of California Los Angeles, Los Angeles, CA 90024, USA.
| | - Yueyang Li
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Jiahua Tan
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Sonia H Y Kung
- Vancouver Prostate Center, Vancouver, BC V5Z 1M9, Canada
| | - Ben H Chew
- Department of Urologic Sciences, The Stone Centre at Vancouver General Hospital, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - David D Y Chen
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada.
| | - Dirk Lange
- Department of Urologic Sciences, The Stone Centre at Vancouver General Hospital, University of British Columbia, Vancouver, BC V6H 3Z6, Canada.
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Metabolomics Analysis of Laparoscopic Surgery Combined with Wuda Granule to Promote Rapid Recovery of Patients with Colorectal Cancer Using UPLC/Q-TOF-MS/MS. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:5068268. [PMID: 32104193 PMCID: PMC7040410 DOI: 10.1155/2020/5068268] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 11/20/2019] [Accepted: 12/21/2019] [Indexed: 12/30/2022]
Abstract
Surgery is the primary curative treatment for patients with nonmetastasized colorectal cancer (CRC). Rate of complications, morbidity, mortality, and overall survival of patients with CRC are factors associated with speed of recovery following surgery. Wuda granule (WD) is a traditional Chinese medicine (TCM) prescription used to promote rapid recovery after surgery. However, the specific mechanism of action of WD has not been characterized. Our study included 60 patients with clear histopathological evidence of colon or rectal cancer who underwent CRC laparoscopic surgery and 30 healthy individuals. Serum biochemistry and clinical evaluation of gastrointestinal function showed that WD could improve the nutritional status and gastrointestinal function and reduce the level of inflammation of patients with CRC following laparoscopic surgery. In addition, we used UPLC/Q-TOF-MS/MS-based metabolomics analysis to determine the mechanism of WD-related rapid recovery following laparoscopic surgery in patients with CRC. Twenty metabolites associated with arachidonic acid, alanine, aspartate and glutamate, α-linolenic acid, pyruvate, histidine, and glycerophospholipids were identified. The results suggested that the therapeutic mechanism of laparoscopic surgery combined with WD may be related to regulation of nutritional status, inflammation, immune function, energy, and gastrointestinal function in patients with CRC. This study also highlighted the ability of TCM compounds to interact with multiple targets to induce synergistic effects. This study may result in further studies of WD as a therapeutic agent to promote recovery following surgical resection of CRC tumors.
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8
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Hellms S, Gueler F, Gutberlet M, Schebb NH, Rund K, Kielstein JT, VoChieu V, Rauhut S, Greite R, Martirosian P, Haller H, Wacker F, Derlin K. Single-dose diclofenac in healthy volunteers can cause decrease in renal perfusion measured by functional magnetic resonance imaging. ACTA ACUST UNITED AC 2019; 71:1262-1270. [PMID: 31131893 DOI: 10.1111/jphp.13105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 04/22/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVES We investigated changes of renal perfusion after topical and oral diclofenac administration in healthy volunteers using functional magnetic resonance imaging (MRI) with arterial spin labelling (ASL). METHODS Twenty-four healthy human participants (21-51 years) underwent 1.5T MRI before and 1 h after a single oral dose of diclofenac (50 mg). Twelve of 24 participants underwent an additional MRI examination following 3-day topical diclofenac administration. For renal perfusion imaging, a flow-sensitive alternating inversion-recovery TrueFISP ASL sequence was applied. Plasma concentrations of diclofenac and serum concentrations of thromboxane were determined. KEY FINDINGS After oral diclofenac application, large interindividual differences in plasma concentrations were observed (range <3-4604 nm). Topical diclofenac application did not result in relevant systemic diclofenac levels (range 5-75 nm). MRI showed a significant reduction of renal perfusion in individuals with diclofenac levels ≥225 nm (baseline: 347 ± 7 vs diclofenac: 323 ± 8 ml/min/100 g, P < 0.01); no significant differences were observed in participants with diclofenac levels <225 nm. Diclofenac levels correlated negatively with thromboxane B2 levels pointing towards target engagement. CONCLUSIONS Single-dose diclofenac caused a decrease in renal perfusion in participants with diclofenac levels ≥225 nm. We demonstrated that even a single dose of diclofenac can impair renal perfusion, which could be detrimental in patients with underlying chronic kidney disease or acute kidney injury.
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Affiliation(s)
- Susanne Hellms
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Faikah Gueler
- Nephrology Hannover Medical School, Hannover, Germany
| | - Marcel Gutberlet
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Nils Helge Schebb
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany.,Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Katharina Rund
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Jan T Kielstein
- Medical Clinic V (Nephrology, Rheumatology, Blood Purification), Academic Teaching Hospital Braunschweig, Braunschweig, Germany
| | - VanDai VoChieu
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | | | - Robert Greite
- Nephrology Hannover Medical School, Hannover, Germany
| | - Petros Martirosian
- Section on Experimental Radiology, University of Tuebingen, Tübingen, Germany
| | | | - Frank Wacker
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Katja Derlin
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
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9
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Hartung NM, Fischer J, Ostermann AI, Willenberg I, Rund KM, Schebb NH, Garscha U. Impact of food polyphenols on oxylipin biosynthesis in human neutrophils. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1536-1544. [PMID: 31125704 DOI: 10.1016/j.bbalip.2019.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 04/11/2019] [Accepted: 05/10/2019] [Indexed: 12/29/2022]
Abstract
The intake of food polyphenols is associated with beneficial impacts on health. Besides anti-oxidative effects, anti-inflammatory properties have been suggested as molecular modes of action, which may result from modulations of the arachidonic acid (AA) cascade. Here, we investigated the effects of a library of food polyphenols on 5-lipoxygenase (5-LOX) activity in a cell-free assay, and in human neutrophils. Resveratrol, its dimer (ε-viniferin), and its imine analogue (IRA) potently blocked the 5-LOX-mediated LT formation in neutrophils with IC50 values in low μM-range. Among the tested flavonoids only the isoflavone genistein showed potent 5-LOX inhibition in neutrophils (IC50 = 0.4 ± 0.1 μM), however was ineffective on isolated 5-LOX. We exclude an interference with the 5-LOX-activating protein (FLAP) in HEK_5-LOX/±FLAP cells and suggest global effects on intact immune cells. Using LC-MS based targeted oxylipin metabolomics, we analyzed the effects of 5-LOX-inhibiting polyphenols on all branches of the AA cascade in Ca2+-ionophore-challenged neutrophils. While ε-viniferin causes a clear substrate shunt towards the remaining AA cascade enzymes (15-LOX, cyclooxygenase - COX-1/2, cytochrome P450), resveratrol inhibited the COX-1/2 pathway and showed a weak attenuation of 12/15-LOX activity. IRA had no impact on 15-LOX activity, but elevated the formation of COX-derived prostaglandins, having no inhibitory effects on COX-1/2. Overall, we show that food polyphenols have the ability to block 5-LOX activity and the oxylipin pattern is modulated with a remarkable compound/structural specificity. Taken the importance of polyphenols for a healthy diet and their concentration in food supplements into account, this finding justifies further investigation.
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Affiliation(s)
- Nicole M Hartung
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany; Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Jana Fischer
- Institute of Pharmacy, Friedrich-Schiller-University, Philosophenweg 14, 07743 Jena, Germany
| | - Annika I Ostermann
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany; Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Ina Willenberg
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany; Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Katharina M Rund
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany; Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Nils Helge Schebb
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany; Faculty of Mathematics and Natural Sciences, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Ulrike Garscha
- Institute of Pharmacy, Friedrich-Schiller-University, Philosophenweg 14, 07743 Jena, Germany.
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10
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Liang Y, Zhou T. Recent advances of online coupling of sample preparation techniques with ultra high performance liquid chromatography and supercritical fluid chromatography. J Sep Sci 2018; 42:226-242. [PMID: 30136406 DOI: 10.1002/jssc.201800721] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/02/2018] [Accepted: 08/04/2018] [Indexed: 12/12/2022]
Abstract
Ultra high performance liquid chromatography and supercritical fluid chromatography techniques are favored because of their high efficiency and fast analysis speed. Although many sample preparation techniques have been coupled with common liquid chromatography online, the online coupling of sample preparation with the two popular chromatography techniques have gained increasing attention owing to the increasing requirements of efficiency and sensitivity. In this review, we have discussed and summarized the recent advances of the online coupling of sample preparation with ultra high performance liquid chromatography and supercritical fluid chromatography techniques. The main sample preparation techniques that have been coupled with ultra high performance liquid chromatography online are solid-phase extraction and in-tube solid-phase microextraction, while solid-phase extraction and supercritical fluid extraction are the main techniques that have been coupled with supercritical fluid chromatography online. Especially, the strategies for online coupling of sample preparation with chromatography techniques were summarized. Typical applications and growing trends of the online coupling techniques were also discussed in detail. With the increasing demands of improving the efficiency, throughput, and analytical capability toward complex samples of the analysis methods, online coupling of sample preparation with chromatography techniques will acquire further development.
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Affiliation(s)
- Yanshan Liang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Ting Zhou
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, P. R. China
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11
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Gobo LA, de Carvalho LM, Temp F, Viana C, Mello CF. A rapid method for identification and quantification of prostaglandins in cerebral tissues by UHPLC-ESI-MS/MS for the lipidomic in vivo studies. Anal Biochem 2018; 545:98-103. [DOI: 10.1016/j.ab.2018.01.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 12/11/2017] [Accepted: 01/02/2018] [Indexed: 10/18/2022]
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12
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Zhang J, Yang Q, Li J, Zhong Y, Zhang L, Huang Q, Chen B, Mo M, Shen S, Zhong Q, Liu H, Cai C. Distinct differences in serum eicosanoids in healthy, enteritis and colorectal cancer individuals. Metabolomics 2017; 14:4. [PMID: 30830334 DOI: 10.1007/s11306-017-1293-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/02/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Eicosanoids as inflammatory mediators take part in the regulation of disease progression. However, the application of serum eicosanoid in disease progression identification was still uncertain. METHODS Serum from 52 healthy volunteers, 34 enteritis patients and 55 colorectal cancer (CRC) patients were collected. Ultra-high performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was used to analyze the change of serum eicosanoids. RESULTS Of 158 eicosanoids, we found that lower levels of anti-inflammatory eicosanoids 13-HOTrE, 9-HOTrE, DHA, 11-HETE and 12-HHT were observed in enteritis and CRC group compared with healthy group, meanwhile the content of 5-iPF2α-VI as oxidative stress mediator in enteritis and CRC group was greater than that in healthy groups. Moreover, 9-HODE, 13-HODE, 12,13-diHOME, 8-HETE and 15-HETE were dramatically decrease in CRC group compared with non-CRC group. Additionally, the change of 5-, 12- and 15-HETE content in serum sample was associated with progression from healthy to enteritis, finally to CRC. No significant difference between serum eicosanoids and the expression of CerbB-2 and Ki67 were observed. CONCLUSION Serum eicosanoids might be used as a possible biomarker for identifying among health, enteritis and CRC.
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Affiliation(s)
- Junjie Zhang
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Qingjin Yang
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Jian Li
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Yu Zhong
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Lijian Zhang
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Qionglin Huang
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Bin Chen
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Mingming Mo
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China
| | - Sensen Shen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering Peking University, Beijing, 100871, China
| | - Qisheng Zhong
- Shimadzu Global COE for Application and Technical Development, Guangzhou, Guangdong, 510010, China
| | - Huwei Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering Peking University, Beijing, 100871, China
| | - Chun Cai
- Analysis Center, Zhanjiang Scientific Center of Guangdong Medical University, Zhanjiang, Guangdong, 524023, China.
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13
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Zhang LJ, Chen B, Zhang JJ, Li J, Yang Q, Zhong QS, Zhan S, Liu H, Cai C. Serum polyunsaturated fatty acid metabolites as useful tool for screening potential biomarker of colorectal cancer. Prostaglandins Leukot Essent Fatty Acids 2017; 120:25-31. [PMID: 28515019 DOI: 10.1016/j.plefa.2017.04.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/14/2017] [Accepted: 04/04/2017] [Indexed: 02/08/2023]
Abstract
The biomarker identification of cancer is benefit for early detection and less invasion. Polyunsaturated fatty acid (PUFA) metabolite as inflammatory mediators can affect progression and treatment of cancer. In this work, the serum was collected from colorectal cancer patients and healthy volunteers, and then we tested the change of serum PUFA metabolites in both of them by ultra-high performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). Of the 158 PUFA and their metabolites, we found that abnormal change of 2, 3-dinor-8-iso-PGF2α, 19-HETE and 12-keto-LTB4 from arachidonic acid were observed in colorectal cancer patients. Meanwhile, 9-HODE and 13-HODE from linoleic acid were significant lower in colorectal cancer patients. Our data suggested that some PUFA metabolites might be used as a potential biomarker of colorectal cancer, which might provide assistance in clinical diagnosis and treatment.
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Affiliation(s)
- Li-Jian Zhang
- Guangdong key laboratory for research and development of nature drugs, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Bin Chen
- Guangdong key laboratory for research and development of nature drugs, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Jun-Jie Zhang
- Guangdong key laboratory for research and development of nature drugs, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Jian Li
- Guangdong key laboratory for research and development of nature drugs, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Qingjing Yang
- Guangdong key laboratory for research and development of nature drugs, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Qi-Sheng Zhong
- Shimadzu Global COE for Application& Technical Development, Guangzhou, Guangdong, 510010, China
| | - Song Zhan
- Shimadzu Global COE for Application& Technical Development, Guangzhou, Guangdong, 510010, China
| | - Huwei Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering Peking University Beijing, 100871, China.
| | - Chun Cai
- Guangdong key laboratory for research and development of nature drugs, Guangdong Medical University, Zhanjiang, Guangdong 524023, China.
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Wang S, Willenberg I, Krohn M, Hecker T, Meckelmann S, Li C, Pan Y, Schebb NH, Steinberg P, Empl MT. Growth-Inhibiting Activity of Resveratrol Imine Analogs on Tumor Cells In Vitro. PLoS One 2017; 12:e0170502. [PMID: 28114318 PMCID: PMC5256997 DOI: 10.1371/journal.pone.0170502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 12/13/2016] [Indexed: 01/14/2023] Open
Abstract
Although resveratrol exerts manifold antitumorigenic effects in vitro, its efficacy against malignancies in vivo seems limited. This has been increasingly recognized in recent years and has prompted scientists to search for structurally related compounds with more promising anticarcinogenic and/or pharmacokinetic properties. A class of structurally modified resveratrol derivatives, so-called resveratrol imine analogs (IRA's), might meet these requirements. Therefore, the biological activity of five of these compounds was examined and compared to that of resveratrol. Firstly, the antiproliferative potency of all five IRA's was investigated using the p53 wildtype-carrying colorectal carcinoma cell line HCT-116wt. Then, using the former and a panel of various other tumor cell lines (including the p53 knockout variant HCT-116p53-/-), the growth-inhibiting and cell cycle-disturbing effects of the most potent IRA (IRA 5, 2-[[(2-hydroxyphenyl)methylene]amino]-phenol) were studied as was its influence on cyclooxygenase-2 expression and activity. Finally, rat liver microsomes were used to determine the metabolic stability of that compound. IRA 5 was clearly the most potent compound in HCT-116wt cells, with an unusually high IC50-value of 0.6 μM. However, in the other five cell lines used, the antiproliferative activity was mostly similar to resveratrol and the effects on the cell cycle were heterogeneous. Although all cell lines were affected by treatment with IRA 5, cells expressing functional p53 seemed to react more sensitively, suggesting that this protein plays a modulating role in the induction of IRA 5-mediated biological effects. Lastly, IRA 5 led to contradictory effects on cyclooxygenase-2 expression and activity and was less glucuronidated than resveratrol. As IRA 5 is approximately 50 times more toxic towards HCT-116wt cells, exerts different effects on the cyclooxygenase-2 and is metabolized to a lesser extent, it shows certain advantages over resveratrol and could therefore serve as basis for additional chemical modifications, potentially yielding compounds with more favorable biological and pharmacokinetic features.
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Affiliation(s)
- Shan Wang
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Ina Willenberg
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Michael Krohn
- Institute of Food Chemistry, University of Wuppertal, Wuppertal, Germany
| | - Tanja Hecker
- Institute of Food Chemistry, University of Wuppertal, Wuppertal, Germany
| | - Sven Meckelmann
- Institute of Food Chemistry, University of Wuppertal, Wuppertal, Germany
| | - Chang Li
- Department of Chemistry, Zhejiang University, Hangzhou, P. R. China
| | - Yuanjiang Pan
- Department of Chemistry, Zhejiang University, Hangzhou, P. R. China
| | - Nils Helge Schebb
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
- Institute of Food Chemistry, University of Wuppertal, Wuppertal, Germany
| | - Pablo Steinberg
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Michael Telamon Empl
- Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
- * E-mail:
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15
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Quantitative analysis of lipids: a higher-throughput LC-MS/MS-based method and its comparison to ELISA. Future Sci OA 2017; 3:FSO157. [PMID: 28344822 PMCID: PMC5351511 DOI: 10.4155/fsoa-2016-0067] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/18/2016] [Indexed: 12/19/2022] Open
Abstract
Aim: Lipids such as prostaglandins, leukotrienes and thromboxanes are released as a result of an inflammatory episode in pain (central and peripheral). Methodology & results: To measure these lipids as potential mechanistic biomarkers in neuropathic pain models, we developed a higher-throughput LC–MS/MS-based method with simultaneous detection of PGE2, PGD2, PGF2α, LTB4, TXB2 and 2-arachidonoyl glycerol in brain and spinal cord tissues. We also demonstrate that the LC–MS/MS method was more sensitive and specific in differentiating PGE2 levels in CNS tissues compared with ELISA. Conclusion: The ability to modify the LC–MS/MS method to accommodate numerous other lipids in one analysis, demonstrates that the presented method offers a cost–effective and more sensitive alternative to ELISA method useful in drug discovery settings. In humans, lipids carry out various functions such as energy production and storage, insulation, digestion and absorption and hormone production. Out of the several lipids, prostaglandins, thromboxanes and leukotrienes play a critical role in cardiovascular diseases, allergic reactions and inflammation. Thus, it is important to monitor their levels as potential mechanistic biomarkers to effectively diagnose and treat the underlying diseases. We have successfully used a highly specific and higher-throughput mass spectrometric method to quantify these lipids in brain cells as well as in brain and spinal cord tissues from rats (pain model) and compared the data obtained in the traditional ELISA.
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16
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Qu L, Fan Y, Wang W, Ma K, Yin Z. Development, validation and clinical application of an online-SPE-LC-HRMS/MS for simultaneous quantification of phenobarbital, phenytoin, carbamazepine, and its active metabolite carbamazepine 10,11-epoxide. Talanta 2016; 158:77-88. [DOI: 10.1016/j.talanta.2016.05.036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 05/12/2016] [Accepted: 05/13/2016] [Indexed: 10/21/2022]
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17
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Shu C, Zeng T, Gao S, Xia T, Huang L, Zhang F, Chen W. LC–MS/MS method for simultaneous determination of thalidomide, lenalidomide, cyclophosphamide, bortezomib, dexamethasone and adriamycin in serum of multiple myeloma patients. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1028:111-119. [DOI: 10.1016/j.jchromb.2016.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/30/2016] [Accepted: 06/06/2016] [Indexed: 12/19/2022]
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18
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Suhr AC, Bruegel M, Maier B, Holdt LM, Kleinhempel A, Teupser D, Grimm SH, Vogeser M. Ferromagnetic particles as a rapid and robust sample preparation for the absolute quantification of seven eicosanoids in human plasma by UHPLC–MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1022:173-182. [DOI: 10.1016/j.jchromb.2016.03.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 02/24/2016] [Accepted: 03/19/2016] [Indexed: 11/16/2022]
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Willenberg I, Meschede AK, Gueler F, Jang MS, Shushakova N, Schebb NH. Food Polyphenols Fail to Cause a Biologically Relevant Reduction of COX-2 Activity. PLoS One 2015; 10:e0139147. [PMID: 26440517 PMCID: PMC4594923 DOI: 10.1371/journal.pone.0139147] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/08/2015] [Indexed: 12/11/2022] Open
Abstract
Epidemiologic studies show a correlation between the dietary intake of food polyphenols and beneficial health effects. Several in vitro studies indicate that the anti-inflammatory potential of polyphenols is, at least in part, mediated by a modulation of the enzymes of the arachidonic acid cascade, such as the prostaglandin forming cyclooxygenases (COXs). Evidence that this mode of action can be transferred to the situation in vivo is scarce. This study characterized effects of a subset of polyphenols on COX–2 expression and activity in vitro and compared the potency with known drugs. Next, the in vivo relevance of the observed in vitro effects was tested. Enzyme assays and incubations of polyphenols with the cancer cell line HCA–7 and lipopolysaccharide (LPS) stimulated primary monocytes support the hypothesis that polyphenols can effect COX–2 expression and activity in vitro. The effects were most pronounced in the monocyte assay for wogonin, apigenin, resveratrol and genistein with IC50 values of 1.5 μM, 2.6 μM, 2.8 μM and 7.4 μM. However, these values are 100- to 1000-fold higher in comparison to those of the known pharmaceuticals celecoxib, indomethacin and dexamethasone. In an animal model of LPS induced sepsis, pretreatment with polyphenols (i. p. 100 mg/kg bw) did not result in decreased plasma or tissue prostaglandin levels, whereas the positive control celecoxib effectively attenuated LPS induced prostaglandin formation. These data suggest that despite the moderate potency in vitro, an effect of polyphenols on COX–2 during acute inflammation is unlikely, even if a high dose of polyphenols is ingested.
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Affiliation(s)
- Ina Willenberg
- University of Veterinary Medicine Hannover, Institute for Food Toxicology and Analytical Chemistry, Bischofsholer Damm 15, 30173 Hannover, Germany
| | - Anna K. Meschede
- University of Veterinary Medicine Hannover, Institute for Food Toxicology and Analytical Chemistry, Bischofsholer Damm 15, 30173 Hannover, Germany
| | - Faikah Gueler
- Department of Nephrology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Mi-Sun Jang
- Department of Nephrology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Nelli Shushakova
- Department of Nephrology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
- Phenos GmbH, Feodor-Lynen-Straße 5, 30625 Hannover, Germany
| | - Nils Helge Schebb
- University of Veterinary Medicine Hannover, Institute for Food Toxicology and Analytical Chemistry, Bischofsholer Damm 15, 30173 Hannover, Germany
- University of Wuppertal, Institute of Food Chemistry, Gaußstraße 20, 42119 Wuppertal, Germany
- * E-mail:
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