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Kurz M, Ulrich M, Kirchhofer SB, Bittner A, Daude M, Diederich WE, Pauck K, Garn H, Bünemann M. Arachidonic Acid Directly Activates the Human DP2 Receptor. Mol Pharmacol 2024; 106:216-224. [PMID: 39284672 DOI: 10.1124/molpharm.124.000884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 05/30/2024] [Accepted: 06/25/2024] [Indexed: 10/05/2024] Open
Abstract
Aberrant type 2 inflammatory responses are the underlying cause of the pathophysiology of allergic asthma, allergic rhinitis, and other atopic diseases, with an alarming prevalence in relevant parts of the Western world. A bulk of evidence points out the important role of the DP2 receptor in these inflammation processes. A screening of different polyunsaturated fatty acids at a fluorescence resonance energy transfer-based DP2 receptor conformation sensor expressed in human embryonic kidney (HEK) cells revealed an agonistic effect of the prostaglandin (PG)-D2 precursor arachidonic acid on DP2 receptor activity of about 80% of the effect induced by PGD2 In a combination of experiments at the conformation sensor and using a bioluminescence resonance energy transfer-based G protein activation sensor expressed together with DP2 receptor wild type in HEK cells, we found that arachidonic acid acts as a direct activator of the DP2 receptor, but not the DP1 receptor, in a concentration range considered physiologically relevant. Pharmacological inhibition of cyclooxygenases and lipoxygenases as well as cytochrome P450 did not lead to a diminished arachidonic acid response on the DP2 receptor, confirming a direct action of arachidonic acid on the receptor. SIGNIFICANCE STATEMENT: This study identified the prostaglandin precursor arachidonic acid to directly activate the DP2 receptor, a G protein-coupled receptor that is known to play an important role in type 2 inflammation.
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Affiliation(s)
- Michael Kurz
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Michaela Ulrich
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Sina B Kirchhofer
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Alwina Bittner
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Michael Daude
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Wibke E Diederich
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Kim Pauck
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Holger Garn
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
| | - Moritz Bünemann
- Institute for Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.K., M.U., S.B.K., A.B., M.B.); Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany (M.D., W.E.D.); and Translational Inflammation Research Division and Core Facility for Single-Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany (K.P., H.G.)
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Zhao L, Wang S, Xu X, Guo W, Yang J, Liu Y, Xie S, Piao G, Xu T, Wang Y, Xu Y. Integrated metabolomics and network pharmacology to reveal the lipid-lowering mechanisms of Qizha Shuangye granules in hyperlipidemic rats. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:3265-3274. [PMID: 38087399 DOI: 10.1002/jsfa.13213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/02/2023] [Accepted: 12/09/2023] [Indexed: 12/24/2023]
Abstract
BACKGROUND Qizha Shuangye granules (QSG) comprise six traditional Chinese herbal medicines (TCHMs), which have a long history of treating hyperlipidemia (HLP) in China. This study aimed to evaluate the potential lipid-lowering effects of QSG in an HLP rat model and investigate possible mechanisms. The HLP rat model was induced by a high-fat diet. Lipid-related indicators in serum were detected. Serum and liver metabolites were investigated using a liquid chromatography-mass spectrometry-based metabolomics approach. A herb-compound-target-metabolite (H-C-T-M) network was further constructed to reveal the possible molecular mechanism of QSG to alleviate HLP. RESULTS The administration of QSG inhibited the HLP-induced changes in total cholesterol, triglyceride, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and non-esterified fatty acid (NEFA) levels. Additionally, QSG significantly attenuated the liver histopathological changes induced by HLP. Metabolomic analysis showed the serum and liver metabolic disorders presented in HLP rats. QSG can reverse the abnormal metabolism caused by HLP. Through network pharmacology analysis, key proteins such as androgen receptor, 3-hydroxy-3-methylglutaryl-CoA reductase, and peroxisome proliferator-activated receptor-α were screened out, and they were speculated to be possible therapeutic targets for QSG to treat HLP. CONCLUSION The present study integrated metabolomics and network pharmacology analysis to reveal the efficacy and possible mechanism of QSG in treating HLP, which provides a new reference for the research and development of QSG as a functional food. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Liang Zhao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
- College of Pharmacy, Yanbian University, Yanji, China
- Key Laboratory of Medicinal Materials, Jilin Academy of Chinese Medicine Sciences, Changchun, China
| | - Shuyue Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaohang Xu
- Key Laboratory of Medicinal Materials, Jilin Academy of Chinese Medicine Sciences, Changchun, China
| | - Wenjun Guo
- Key Laboratory of Medicinal Materials, Jilin Academy of Chinese Medicine Sciences, Changchun, China
| | - Jingxuan Yang
- Key Laboratory of Medicinal Materials, Jilin Academy of Chinese Medicine Sciences, Changchun, China
| | - Yue Liu
- Key Laboratory for Analysis Methods of Active Ingredients in Traditional Chinese Medicine, Jilin Academy of Chinese Medicine Sciences, Changchun, China
| | - Shengxu Xie
- Key Laboratory for Analysis Methods of Active Ingredients in Traditional Chinese Medicine, Jilin Academy of Chinese Medicine Sciences, Changchun, China
| | - Guangchun Piao
- College of Pharmacy, Yanbian University, Yanji, China
- Key Laboratory for Natural Resource of Changbai Mountain, Yanbian University, Yanji, China
| | - Tunhai Xu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yang Wang
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Yajuan Xu
- Key Laboratory of Medicinal Materials, Jilin Academy of Chinese Medicine Sciences, Changchun, China
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Hayashi A, Kobayashi K, Nakamura T, Nagata N, Murata T. Production profile of lipid mediators in conjunctival lavage fluid in allergic and infectious conjunctivitis in guinea pigs. FRONTIERS IN ALLERGY 2023; 4:1218447. [PMID: 37483465 PMCID: PMC10358838 DOI: 10.3389/falgy.2023.1218447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 06/26/2023] [Indexed: 07/25/2023] Open
Abstract
Introduction Conjunctivitis is a major ocular disease classified into allergic or infectious. The pathological features of conjunctivitis are not fully understood despite its high morbidity rate; thus, its differentiation can be difficult. Materials and methods We used ovalbumin-induced allergic conjunctivitis and lipopolysaccharide-induced infectious conjunctivitis models of guinea pigs. Both models showed conjunctival swelling. Histological studies revealed that numerous eosinophils infiltrated the conjunctiva in the allergic model, whereas neutrophils infiltrated the conjunctiva in the infectious model. We collected conjunctival lavage fluid (COLF) and comprehensively analyzed lipid production using liquid chromatography-tandem mass spectrometry. Results COLF showed increase of 20 and 12 lipid species levels in the allergic and infectious models, respectively. Specifically, the levels of a major allergic mediator, prostaglandin D2 and its three metabolites and several cytochrome P450-catalyzed lipids increased in the allergic model. In the infectious model, the levels of prostaglandin E2 and 8-iso-prostaglandin E2 increased, indicating tissue inflammation. Moreover, the level of 12-oxo-eicosatetraenoic acid, a lipoxygenase metabolite, increased in the infectious model. Conclusion These differences in lipid production in the COLF reflected the pathological features of allergic and infectious conjunctivitis.
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Affiliation(s)
- Akane Hayashi
- Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Koji Kobayashi
- Food and Animal Systemics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Tatsuro Nakamura
- Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Nanae Nagata
- Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Takahisa Murata
- Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
- Food and Animal Systemics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
- Veterinary Pharmacology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Das UN. "Cell Membrane Theory of Senescence" and the Role of Bioactive Lipids in Aging, and Aging Associated Diseases and Their Therapeutic Implications. Biomolecules 2021; 11:biom11020241. [PMID: 33567774 PMCID: PMC7914625 DOI: 10.3390/biom11020241] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 12/12/2022] Open
Abstract
Lipids are an essential constituent of the cell membrane of which polyunsaturated fatty acids (PUFAs) are the most important component. Activation of phospholipase A2 (PLA2) induces the release of PUFAs from the cell membrane that form precursors to both pro- and ant-inflammatory bioactive lipids that participate in several cellular processes. PUFAs GLA (gamma-linolenic acid), DGLA (dihomo-GLA), AA (arachidonic acid), EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) are derived from dietary linoleic acid (LA) and alpha-linolenic acid (ALA) by the action of desaturases whose activity declines with age. Consequently, aged cells are deficient in GLA, DGLA, AA, AA, EPA and DHA and their metabolites. LA, ALA, AA, EPA and DHA can also be obtained direct from diet and their deficiency (fatty acids) may indicate malnutrition and deficiency of several minerals, trace elements and vitamins some of which are also much needed co-factors for the normal activity of desaturases. In many instances (patients) the plasma and tissue levels of GLA, DGLA, AA, EPA and DHA are low (as seen in patients with hypertension, type 2 diabetes mellitus) but they do not have deficiency of other nutrients. Hence, it is reasonable to consider that the deficiency of GLA, DGLA, AA, EPA and DHA noted in these conditions are due to the decreased activity of desaturases and elongases. PUFAs stimulate SIRT1 through protein kinase A-dependent activation of SIRT1-PGC1α complex and thus, increase rates of fatty acid oxidation and prevent lipid dysregulation associated with aging. SIRT1 activation prevents aging. Of all the SIRTs, SIRT6 is critical for intermediary metabolism and genomic stability. SIRT6-deficient mice show shortened lifespan, defects in DNA repair and have a high incidence of cancer due to oncogene activation. SIRT6 overexpression lowers LDL and triglyceride level, improves glucose tolerance, and increases lifespan of mice in addition to its anti-inflammatory effects at the transcriptional level. PUFAs and their anti-inflammatory metabolites influence the activity of SIRT6 and other SIRTs and thus, bring about their actions on metabolism, inflammation, and genome maintenance. GLA, DGLA, AA, EPA and DHA and prostaglandin E2 (PGE2), lipoxin A4 (LXA4) (pro- and anti-inflammatory metabolites of AA respectively) activate/suppress various SIRTs (SIRt1 SIRT2, SIRT3, SIRT4, SIRT5, SIRT6), PPAR-γ, PARP, p53, SREBP1, intracellular cAMP content, PKA activity and peroxisome proliferator-activated receptor γ coactivator 1-α (PGC1-α). This implies that changes in the metabolism of bioactive lipids as a result of altered activities of desaturases, COX-2 and 5-, 12-, 15-LOX (cyclo-oxygenase and lipoxygenases respectively) may have a critical role in determining cell age and development of several aging associated diseases and genomic stability and gene and oncogene activation. Thus, methods designed to maintain homeostasis of bioactive lipids (GLA, DGLA, AA, EPA, DHA, PGE2, LXA4) may arrest aging process and associated metabolic abnormalities.
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Affiliation(s)
- Undurti N. Das
- UND Life Sciences, 2221 NW 5th St, Battle Ground, WA 98604, USA; ; Tel.: +508-904-5376
- BioScience Research Centre and Department of Medicine, GVP Medical College and Hospital, Visakhapatnam 530048, India
- International Research Centre, Biotechnologies of the third Millennium, ITMO University, 191002 Saint-Petersburg, Russia
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Some Biogenetic Considerations Regarding the Marine Natural Product (-)-Mucosin. Molecules 2019; 24:molecules24224147. [PMID: 31731797 PMCID: PMC6891381 DOI: 10.3390/molecules24224147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/13/2019] [Accepted: 11/14/2019] [Indexed: 02/06/2023] Open
Abstract
Recently, the identity of the marine hydrindane natural product (−)-mucosin was revised to the trans-fused structure 6, thereby providing a biogenetic puzzle that remains to be solved. We are now disseminating some of our insights with regard to the possible machinery delivering the established architecture. Aspects with regard to various modes of cyclization in terms of concerted versus stepwise processes are held up against the enzymatic apparatus known to be working on arachidonic acid (8). To provide a contrast to the tentative polyunsaturated fatty acid biogenesis, the structural pattern featured in (−)-mucosin (6) is compared to some marine hydrinane natural products of professed polyketide descent. Our appraisal points to a different origin and strengthens the hypothesis of a polyunsaturated fatty acids (PUFA) as the progenitor of (−)-mucosin (6).
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Targeting the PGD 2/CRTH2/DP1 Signaling Pathway in Asthma and Allergic Disease: Current Status and Future Perspectives. Drugs 2018; 77:1281-1294. [PMID: 28612233 PMCID: PMC5529497 DOI: 10.1007/s40265-017-0777-2] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Prostaglandin D2 (PGD2) released by degranulating mast cells is believed to play a key role in orchestrating mechanisms of inflammation in allergies and asthma. The biological effects of PGD2 are mediated by D-prostanoid (DP1), CRTH2 (DP2), and thromboxane prostanoid (TP) receptors. The CRTH2 receptor is involved in induction of migration and activation of T helper type 2 (Th2) lymphocytes, eosinophils, and basophils; up-regulation of adhesion molecules; and promotion of pro-inflammatory Th2-type cytokines (interleukin [IL]-4, 5, 13), whereas the DP receptor is associated with relaxation of smooth muscles, vasodilation, inhibition of cell migration, and apoptosis of eosinophils. A number of CRTH2/PGD2 receptor antagonists have been investigated in asthma and allergic diseases. The CRTH2 antagonist (OC000459) or dual CRTH2 and TP receptor antagonist (ramatroban) were effective in reducing eosinophilia, nasal mucosal swelling, and clinical symptoms of allergic rhinitis, with the latter drug registered for clinical use in this indication. OC000459 and setipiprant reduced the late but not early phase of response in an allergen challenge in atopic asthmatics. In persistent asthma, some molecules induced limited improvement in lung function, quality of life, and asthma symptoms (OC000459, BI671800), but in other trials with AMG 853 and AZ1981 these findings were not confirmed. The clear discrepancy between animal studies and clinical efficacy of CRTH2 antagonism in allergic rhinitis, and lack of efficacy in a general cohort of asthmatics, highlight the issue of patient phenotyping. There is no doubt that the PGD2/CATH2/DP1 pathway plays a key role in allergic inflammation and further studies with selective or combined antagonisms in well defined cohorts of patients are needed.
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Kuna P, Bjermer L, Tornling G. Two Phase II randomized trials on the CRTh2 antagonist AZD1981 in adults with asthma. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:2759-70. [PMID: 27621597 PMCID: PMC5012601 DOI: 10.2147/dddt.s105142] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Chemoattractant receptor-homologous molecule expressed on T helper type 2 (Th2) cell (CRTh2) receptor antagonists is being investigated for asthma. Objectives The aim of this study was to assess the effects of the CRTh2 receptor antagonist, AZD1981 (with/without inhaled corticosteroids [ICSs]), on lung function and asthma control. Patients and methods Adults aged 18–60 years were enrolled in two randomized, placebo-controlled, parallel-group trials (protocol number: D9830C00003 [study 1, n=209] and protocol number: D9830C00004 [study 2, n=510]). In study 1, patients with stable asthma (forced expiratory volume in 1 second [FEV1]: 65%−110%) were withdrawn from ICS (<400 µg/d) and randomized to AZD1981 1,000 mg twice daily (bid) or placebo. In study 2, patients with uncontrolled asthma (FEV1: 40%−85%) despite ICS therapy (≥500 µg/d) were randomized to 50 mg, 400 mg, or 1,000 mg bid AZD1981 or placebo. The primary efficacy variable for both trials was the change in morning peak expiratory flow after 4 weeks of treatment. Secondary variables included Asthma Control Questionnaire (ACQ-5) scores, FEV1 assessments, safety, and tolerability. In study 2, efficacy was also assessed according to atopic status. Results Following 4 weeks of treatment, there was a nonsignificant increase in morning peak expiratory flow on AZD1981 1,000 mg bid (9.5 L/min vs placebo, P=0.086 [study 1] and 12 L/min vs placebo, P=0.16 [study 2]). In study 2, all doses of AZD1981 provided significant improvements in ACQ-5 scores (0.26–0.3 units vs placebo, P=0.010–0.022); however, there was no dose–response relationship. Improved ACQ-5 scores and FEV1 were observed in the majority of atopic patients treated with AZD1981. AZD1981 was well tolerated across treatment groups. Conclusion Further research may be warranted in atopic patients to fully evaluate the clinical efficacy of AZD1981.
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Affiliation(s)
- Piotr Kuna
- Department of Internal Medicine, Asthma and Allergy, Barlicki University Hospital, Medical University of Łódz, Łódz, Poland
| | - Leif Bjermer
- Department of Respiratory Medicine and Allergology, Skane University Hospital, Lund University
| | - Göran Tornling
- AstraZeneca Research and Development, Molndal; Respiratory Medicine Unit, Department of Medicine Solna and CMM, Karolinska Institute and Karolinska University Hospital, Solna, Sweden
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Gabbs M, Leng S, Devassy JG, Monirujjaman M, Aukema HM. Advances in Our Understanding of Oxylipins Derived from Dietary PUFAs. Adv Nutr 2015; 6:513-40. [PMID: 26374175 PMCID: PMC4561827 DOI: 10.3945/an.114.007732] [Citation(s) in RCA: 477] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Oxylipins formed from polyunsaturated fatty acids (PUFAs) are the main mediators of PUFA effects in the body. They are formed via cyclooxygenase, lipoxygenase, and cytochrome P450 pathways, resulting in the formation of prostaglandins, thromboxanes, mono-, di-, and tri-hydroxy fatty acids (FAs), epoxy FAs, lipoxins, eoxins, hepoxilins, resolvins, protectins (also called neuroprotectins in the brain), and maresins. In addition to the well-known eicosanoids derived from arachidonic acid, recent developments in lipidomic methodologies have raised awareness of and interest in the large number of oxylipins formed from other PUFAs, including those from the essential FAs and the longer-chain n-3 (ω-3) PUFAs. Oxylipins have essential roles in normal physiology and function, but can also have detrimental effects. Compared with the oxylipins derived from n-3 PUFAs, oxylipins from n-6 PUFAs generally have greater activity and more inflammatory, vasoconstrictory, and proliferative effects, although there are notable exceptions. Because PUFA composition does not necessarily reflect oxylipin composition, comprehensive analysis of the oxylipin profile is necessary to understand the overall physiologic effects of PUFAs mediated through their oxylipins. These analyses should include oxylipins derived from linoleic and α-linolenic acids, because these largely unexplored bioactive oxylipins constitute more than one-half of oxylipins present in tissues. Because collated information on oxylipins formed from different PUFAs is currently unavailable, this review provides a detailed compilation of the main oxylipins formed from PUFAs and describes their functions. Much remains to be elucidated in this emerging field, including the discovery of more oxylipins, and the understanding of the differing biological potencies, kinetics, and isomer-specific activities of these novel PUFA metabolites.
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Affiliation(s)
| | | | | | | | - Harold M Aukema
- Human Nutritional Sciences, University of Manitoba, Winnipeg, Canada; and Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Canada
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Uhl O, Demmelmair H, Segura MT, Florido J, Rueda R, Campoy C, Koletzko B. Effects of obesity and gestational diabetes mellitus on placental phospholipids. Diabetes Res Clin Pract 2015; 109:364-71. [PMID: 26021978 DOI: 10.1016/j.diabres.2015.05.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 03/26/2015] [Accepted: 05/02/2015] [Indexed: 11/29/2022]
Abstract
Gestational diabetes mellitus (GDM) is associated with adverse effects in the offspring. The composition of placental glycerophospholipids (GPL) is known to be altered in GDM and might reflect an aberrant fatty acid transfer across the placenta and thus affect the foetal body composition. The aim of this study was to investigate possible effects of obesity and GDM, respectively, on placental GPL species composition. We investigated molecular species of phosphatidylcholine (PC), phosphatidylethanolamine (PE) and phosphatidylserine (PS) in term placentas from controls (lean non-diabetic, body-mass-index [BMI] 18-24.9k g/m(2), n=31), obese non-diabetics (BMI ≥30 kg/m(2), n=17) and lean diabetics (n=15), using liquid chromatography - triple quadrupole mass spectrometry. PE(16:0/22:6) and PE(18:0/20:4) were increased in GDM and decreased species were PC(18:0/20:3), PC(18:1/20:3) and PS(18:0/18:2). A consistent difference between BMI related changes and changes caused by GDM was not observed. Arachidonic acid percentages of cord blood correlated with placental PC(16:0/20:4), whereas foetal docosahexaenoic acid correlated to placental PE species. Furthermore, a positive correlation of placental weight was found to levels of PE containing arachidonic acid. We demonstrated that obesity and GDM are associated with decreased dihomo-gamma-linolenic acid and increased arachidonic acid and docosahexaenoic acid contents of placental GPL, with unknown consequences for the foetus. PC(16:0/20:4) was identified as the major component for the supply of arachidonic acid to the foetal circulation, whereas PE containing arachidonic acid was found to be associated to the placental and infant growth.
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Affiliation(s)
- Olaf Uhl
- Division of Metabolic and Nutritional Medicine, Dr. von Hauner Children's Hospital, University of Munich Medical Center, Munich, Germany
| | - Hans Demmelmair
- Division of Metabolic and Nutritional Medicine, Dr. von Hauner Children's Hospital, University of Munich Medical Center, Munich, Germany
| | - María Teresa Segura
- EURISTIKOS Excellence Centre for Paediatric Research, University of Granada, Spain
| | - Jesús Florido
- Department of Obstetrics and Gynecology, Granada's University Hospital San Cecilio, Granada, Spain
| | - Ricardo Rueda
- Strategic Research Department, Abbott Nutrition, Granada, Spain
| | - Cristina Campoy
- EURISTIKOS Excellence Centre for Paediatric Research, University of Granada, Spain; Department of Pediatrics, School of Medicine, University of Granada, Granada, Spain
| | - Berthold Koletzko
- Division of Metabolic and Nutritional Medicine, Dr. von Hauner Children's Hospital, University of Munich Medical Center, Munich, Germany.
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Babu S, Sohn H, Madhavan T. Computational Analysis of CRTh2 receptor antagonist: A Ligand-based CoMFA and CoMSIA approach. Comput Biol Chem 2015; 56:109-21. [PMID: 25935115 DOI: 10.1016/j.compbiolchem.2015.04.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 04/07/2015] [Accepted: 04/18/2015] [Indexed: 10/23/2022]
Abstract
CRTh2 receptor is an important mediator of inflammatory effects and has attracted much attention as a therapeutic target for the treatment of conditions such as asthma, COPD, allergic rhinitis and atopic dermatitis. In pursuit of better CRTh2 receptor antagonist agents, 3D-QSAR studies were performed on a series of 2-(2-(benzylthio)-1H-benzo[d]imidazol-1-yl) acetic acids. There is no crystal structure information available on this protein; hence in this work, ligand-based comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) were performed by atom by atom matching alignment using systematic search and simulated annealing methods. The 3D-QSAR models were generated with 10 different combinations of test and training set molecules, since the robustness and predictive ability of the model is very important. We have generated 20 models for CoMFA and 100 models for CoMSIA based on two different alignments. Each model was validated with statistical cut off values such as q(2)>0.4, r(2)>0.5 and r(2)pred>0.5. Based on better q(2) and r(2)pred values, the best predictions were obtained for the CoMFA (model 5 q(2)=0.488, r(2)pred=0.732), and CoMSIA (model 45 q(2)=0.525, r(2)pred=0.883) from systematic search conformation alignment. The high correlation between the cross-validated/predicted and experimental activities of a test set revealed that the CoMFA and CoMSIA models were robust. Statistical parameters from the generated QSAR models indicated the data is well fitted and have high predictive ability. The generated models suggest that steric, electrostatic, hydrophobic, H-bond donor and acceptor parameters are important for activity. Our study serves as a guide for further experimental investigations on the synthesis of new CRTh2 antagonist.
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Affiliation(s)
- Sathya Babu
- Department of Bioinformatics, School of Bioengineering, SRM University, SRM Nagar, Kattankulathur, Chennai 603203, India
| | - Honglae Sohn
- Department of Chemistry and Department of Carbon Materials, Chosun University, Gwangju 501-759, South Korea.
| | - Thirumurthy Madhavan
- Department of Bioinformatics, School of Bioengineering, SRM University, SRM Nagar, Kattankulathur, Chennai 603203, India.
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Konya V, Peinhaupt M, Heinemann A. Adhesion of eosinophils to endothelial cells or substrates under flow conditions. Methods Mol Biol 2015; 1178:143-56. [PMID: 24986614 DOI: 10.1007/978-1-4939-1016-8_13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Recruitment of eosinophils into the lung tissue is a critical event in allergic inflammatory reactions. Extravasation of eosinophils from the bloodstream is a highly dynamic multistep process that involves capture, rolling, activation, firm adhesion, and transendothelial and subendothelial migration of the cells. It is assumed that the rate-limiting step in this cascade is the capture and firm adhesion of cells to the endothelium. As such it is most critical to study endothelial-leukocyte interaction using assays which are capable of mimicking physiological flow conditions. Previously, various parallel flow chamber setups had been used for studying leukocyte adhesion to endothelial cells. Here we describe a highly reproducible technique for investigating eosinophil adhesion to endothelial cell layer or adhesion molecule/extracellular matrix protein coating in biochips by using a semiautomated microfluidic platform and live-cell imaging. In detail, we show eosinophil adhesion to endothelial cells activated by tumour necrosis factor (TNF) alpha, and adhesion to fibronectin of eosinophils stimulated by prostaglandin (PG) D2.
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Affiliation(s)
- Viktoria Konya
- Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Universitaetsplatz 4, 8010, Graz, Austria
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Huang Y, Chen G, Liu X, Shao Y, Gao P, Xin C, Cui Z, Zhao X, Xu G. Serum metabolomics study and eicosanoid analysis of childhood atopic dermatitis based on liquid chromatography-mass spectrometry. J Proteome Res 2014; 13:5715-23. [PMID: 25316199 DOI: 10.1021/pr5007069] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Atopic dermatitis (AD) is the most common inflammatory skin disease in children. In the study, ultra high performance liquid chromatography-mass spectrometry was used to investigate serum metabolic abnormalities of AD children. Two batch fasting sera were collected from AD children and healthy control; one of them was for nontargeted metabolomics analysis, the other for targeted eicosanoids analysis. AD children were divided into high immunoglobulin E (IgE) group and normal IgE group. On the basis of the two analysis approaches, it was found that the differential metabolites of AD, leukotriene B4, prostaglandins, conjugated bile acids, etc., were associated with inflammatory response and bile acids metabolism. Carnitines, free fatty acids, lactic acid, etc., increased in the AD group with high IgE, which revealed energy metabolism disorder. Amino acid metabolic abnormalities and increased levels of Cytochrome P450 epoxygenase metabolites were found in the AD group with normal IgE. The results provided a new perspective to understand the mechanism and find potential biomarkers of AD and may provide a new reference for personalized treatment.
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Affiliation(s)
- Yan Huang
- Dalian Children's Hospital , Dalian 116011, China
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