1
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Wang T, Yang J, Zhu Y, Niu N, Ding B, Wang P, Zhao H, Li N, Chao Y, Gao S, Dong X, Wang Z. Evaluation of metabolomics-based urinary biomarker models for recognizing major depression disorder and bipolar disorder. J Affect Disord 2024; 356:1-12. [PMID: 38548210 DOI: 10.1016/j.jad.2024.03.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 03/01/2024] [Accepted: 03/23/2024] [Indexed: 04/12/2024]
Abstract
BACKGROUND Major depressive disorder (MDD) and bipolar disorder (BD) are psychiatric disorders with overlapping symptoms, leading to high rates of misdiagnosis due to the lack of biomarkers for differentiation. This study aimed to identify metabolic biomarkers in urine samples for diagnosing MDD and BD, as well as to establish unbiased differential diagnostic models. METHODS We utilized a metabolomics approach employing ultra-high performance liquid chromatography-mass spectrometry (UHPLC-MS) to analyze the metabolic profiles of urine samples from individuals with MDD (n = 50), BD (n = 12), and healthy controls (n = 50). The identification of urine metabolites was verified using MS data analysis tools and online metabolite databases. RESULTS Two diagnostic panels consisting of a combination of metabolites and clinical indicators were identified-one for MDD and another for BD. The discriminative capacity of these panels was assessed using the area under the receiver operating characteristic (ROC) curve, yielding an area under the curve (AUC) of 0.9084 for MDD and an AUC value of 0.9017 for BD. CONCLUSIONS High-resolution mass spectrometry-based assays show promise in identifying urinary biomarkers for depressive disorders. The combination of urine metabolites and clinical indicators is effective in differentiating healthy controls from individuals with MDD and BD. The metabolic pathway indicating oxidative stress is seen to significantly contribute to depressive disorders.
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Affiliation(s)
- Tianjiao Wang
- School of Medicine, Shanghai University, Shanghai 200444, China; Clinical Research Center for Mental Health, School of Medicine, Shanghai University, Shanghai 200083, China
| | - Jingzhi Yang
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China
| | - Yuncheng Zhu
- Clinical Research Center for Mental Health, School of Medicine, Shanghai University, Shanghai 200083, China; Division of Mood Disorders, Shanghai Hongkou Mental Health Center, Shanghai 200083, China
| | - Na Niu
- Division of Mood Disorders, Shanghai Hongkou Mental Health Center, Shanghai 200083, China
| | - Binbin Ding
- Division of Mood Disorders, Shanghai Hongkou Mental Health Center, Shanghai 200083, China
| | - Ping Wang
- Division of Mood Disorders, Shanghai Hongkou Mental Health Center, Shanghai 200083, China
| | - Hongxia Zhao
- Zhanjiang Institute of Clinical Medicine, Central People's Hospital of Zhanjiang, Zhanjiang 524045, China
| | - Na Li
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Yufan Chao
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Songyan Gao
- Institute of Translational Medicine, Shanghai University, Shanghai 200444, China
| | - Xin Dong
- School of Medicine, Shanghai University, Shanghai 200444, China; Clinical Research Center for Mental Health, School of Medicine, Shanghai University, Shanghai 200083, China.
| | - Zuowei Wang
- Clinical Research Center for Mental Health, School of Medicine, Shanghai University, Shanghai 200083, China; Division of Mood Disorders, Shanghai Hongkou Mental Health Center, Shanghai 200083, China.
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2
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Shi W, Han Y. An untargeted serum and urine lipidomics research based on UPLC-MS revealed the lipid alterations on adjuvant-induced arthritis rats. Biomed Chromatogr 2023; 37:e5736. [PMID: 37668238 DOI: 10.1002/bmc.5736] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/20/2023] [Accepted: 08/15/2023] [Indexed: 09/06/2023]
Abstract
Rheumatoid arthritis (RA) is a systemic autoimmune disease dominated by chronic inflammatory lesions of peripheral synovial joints. Growing evidence suggests that abnormal lipid metabolism levels contribute to the progression of RA. Although several metabolomics studies have shown abnormality in the RA lipidome, the relationship between the overall lipid metabolites and RA has not been systematically evaluated. In this study, an untargeted lipidomics method based on ultra performance liquid chromatography-mass spectrometry (UPLC-MS) was used to analyze the serum and urine lipidomes of adjuvant-induced arthritis rats to study the characteristics of lipid metabolism changes in the rats and search lipid markers for diagnosing RA. By combining with orthogonal partial least squares discriminant analysis, a total of 52 potential lipid markers were identified, mainly involved in sphingolipid metabolism, glycerophospholipid metabolism, sterol lipid metabolism, glycerolipid metabolism and fatty acid metabolism, which provided crucial insight into lipid metabolism disturbances in RA. Further receiver operating characteristic analysis revealed that the areas under the curve of PC(22:4/16:0), PI(18:1/16:0) and LacCer(d18:1/12:0) from serum and 25-hydroxycholesterol from urine were 0.94, 1.00, 1.00 and 1.00, respectively, indicating the high predictive ability of this method for RA. In this study, our results indicated that a combination of serum and urine analysis can provide a more comprehensive and reliable assessment of RA, and a UPLC-MS-based lipidomics strategy is a powerful tool to search for potential lipid markers associated with RA and explore the pathogenesis of RA.
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Affiliation(s)
- Wei Shi
- Shenyang Pharmaceutical University, Shenyang, Liaoning Province, People's Republic of China
| | - Yue Han
- Shenyang Pharmaceutical University, Shenyang, Liaoning Province, People's Republic of China
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3
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Meadows AM, Han K, Singh K, Murgia A, McNally BD, West JA, Huffstutler RD, Powell-Wiley TM, Baumer Y, Griffin JL, Sack MN. N-arachidonylglycine is a caloric state-dependent circulating metabolite which regulates human CD4 +T cell responsiveness. iScience 2023; 26:106578. [PMID: 37128607 PMCID: PMC10148119 DOI: 10.1016/j.isci.2023.106578] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/29/2023] [Accepted: 03/29/2023] [Indexed: 05/03/2023] Open
Abstract
Caloric deprivation interventions such as intermittent fasting and caloric restriction ameliorate metabolic and inflammatory disease. As a human model of caloric deprivation, a 24-h fast blunts innate and adaptive immune cell responsiveness relative to the refed state. Isolated serum at these time points confers these same immunomodulatory effects on transformed cell lines. To identify serum mediators orchestrating this, metabolomic and lipidomic analysis was performed on serum extracted after a 24-h fast and re-feeding. Bioinformatic integration with concurrent peripheral blood mononuclear cells RNA-seq analysis implicated key metabolite-sensing GPCRs in fasting-mediated immunomodulation. The putative GPR18 ligand N-arachidonylglycine (NAGly) was elevated during fasting and attenuated CD4+T cell responsiveness via GPR18 MTORC1 signaling. In parallel, NAGly reduced inflammatory Th1 and Th17 cytokines levels in CD4+T cells isolated from obese subjects, identifying a fasting-responsive metabolic intermediate that may contribute to the regulation of nutrient-level dependent inflammation associated with metabolic disease.
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Affiliation(s)
- Allison M. Meadows
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | - Kim Han
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
| | - Komudi Singh
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
| | - Antonio Murgia
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | - Ben D. McNally
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | - James A. West
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
| | | | - Tiffany M. Powell-Wiley
- Social Determinants of Obesity and Cardiovascular Risk Laboratory, NHLBI, NIH, Bethesda, MD, USA
| | - Yvonne Baumer
- Social Determinants of Obesity and Cardiovascular Risk Laboratory, NHLBI, NIH, Bethesda, MD, USA
| | - Julian L. Griffin
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
- The Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Foresterhill Campus, Aberdeen, UK
| | - Michael N. Sack
- Laboratory of Mitochondrial Biology and Metabolism, NHLBI, NIH, Bethesda, MD, USA
- Cardiovascular Branch, NHLBI, NIH, Bethesda, MD, USA
- Corresponding author
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4
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Vishnubhotla RV, Wood PL, Verma A, Cebak JE, Hariri S, Mudigonda M, Alankar S, Maturi R, Orui H, Subramaniam B, Palwale D, Renschler J, Sadhasivam S. Advanced Meditation and Vegan Diet Increased Acylglycines and Reduced Lipids Associated with Improved Health: A Prospective Longitudinal Study. JOURNAL OF INTEGRATIVE AND COMPLEMENTARY MEDICINE 2022; 28:674-682. [PMID: 35532984 DOI: 10.1089/jicm.2022.0480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Introduction: Samyama is an Isha Yoga 8-day residential meditation/yoga retreat combined with 60 days of preparation with vegan diet. We showed earlier Samyama retreat was associated with lower systemic inflammation and favorable lipid profiles along with other physical and mental health benefits. There is no mechanistic study on the impact of an advanced meditative process on multiple blood lipids and their implications on meditation-related improved physical and mental wellbeing. Methods: Sixty-four Samyama participants on vegan diet had blood sampled immediately before and immediately after the 8-day retreat for lipidomic analysis. The complex plasma lipidome was characterized using high-resolution mass spectrometric analysis and tandem mass spectrometry. Results: Pre- and post-Samyama blood samples of 64 Samyama participants were analyzed. Acylglycines (acetyl, propionyl, butyryl, and valeryl) were increased in the plasma post-Samyama compared with pre-Samyama (p < 0.001). Levels of glycerophosphocholines, glycerophosphoethanolamines, di-unsaturated ethanolamine plasmalogens, cholesterol esters, acylcarnitines, and acylgylcerines (triacylglycerols and diacylglycerols) decreased after the Samyama meditation. Plasma levels of glycerophosphoserines or glycerophosphoinositols were unchanged. Conclusion: An 8-day advanced meditation retreat resulted in increased acylglycines, an endocannabinoid-like fatty acid amide associated with increased cellular anandamide levels, anti-inflammation, analgesia, and vascular relaxation. Other serum lipid levels, including some that are associated with increased risk of atherosclerosis, were reduced following the Samyama program. ClinicalTrials.gov Registration: Identifier: NCT04366544.
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Affiliation(s)
- Ramana V Vishnubhotla
- Department of Radiology, Indiana University School of Medicine, Indianpolis, IN, USA
| | - Paul L Wood
- Metabolomics Unit, College of Veterinary Medicine, Lincoln Memorial University, Harrogate, TN, USA
| | - Ashutosh Verma
- Metabolomics Unit, College of Veterinary Medicine, Lincoln Memorial University, Harrogate, TN, USA
| | - John E Cebak
- DeBusk College of Osteopathic Medicine, Lincoln Memorial University, Harrogate, TN, USA
| | - Sepideh Hariri
- Sadhguru Center for a Conscious Planet, Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Boson, MA, USA
| | - Mayur Mudigonda
- Redwood Center for Theoretical Neuroscience, University of California, Berkeley, CA, USA
| | - Suresh Alankar
- Vascular Surgery, University of Louisville, Louisville, KY, USA
| | - Raj Maturi
- Department of Ophthalmology, Eugene and Marilyn Glick Eye Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Hibiki Orui
- Sadhguru Center for a Conscious Planet, Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Boson, MA, USA
| | - Balachundhar Subramaniam
- Sadhguru Center for a Conscious Planet, Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Boson, MA, USA
| | - Dhanashri Palwale
- Department of Anesthesia, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Janelle Renschler
- Department of Anesthesia, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Senthilkumar Sadhasivam
- Department of Anesthesia, Indiana University School of Medicine, Indianapolis, IN, USA
- Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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5
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Vigeland MD, Flåm ST, Vigeland MD, Espeland A, Kristoffersen PM, Vetti N, Wigemyr M, Bråten LCH, Gjefsen E, Schistad EI, Haugen AJ, Froholdt A, Skouen JS, Zwart JA, Storheim K, Pedersen LM, Lie BA. Correlation between gene expression and MRI STIR signals in patients with chronic low back pain and Modic changes indicates immune involvement. Sci Rep 2022; 12:215. [PMID: 34997115 PMCID: PMC8741947 DOI: 10.1038/s41598-021-04189-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 12/16/2021] [Indexed: 01/02/2023] Open
Abstract
Disability and distress caused by chronic low back pain (LBP) lacking clear pathoanatomical explanations cause huge problems both for patients and society. A subgroup of patients has Modic changes (MC), identifiable by MRI as vertebral bone marrow lesions. The cause of such changes and their relationship to pain are not yet understood. We explored the pathobiology of these lesions using profiling of gene expression in blood, coupled with an edema-sensitive MRI technique known as short tau inversion recovery (STIR) imaging. STIR images and total RNA from blood were collected from 96 patients with chronic LBP and MC type I, the most inflammatory MC state. We found the expression of 37 genes significantly associated with STIR signal volume, ten genes with edema abundancy (a constructed combination of STIR signal volume, height, and intensity), and one gene with expression levels significantly associated with maximum STIR signal intensity. Gene sets related to interferon signaling, mitochondrial metabolism and defense response to virus were identified as significantly enriched among the upregulated genes in all three analyses. Our results point to inflammation and immunological defense as important players in MC biology in patients with chronic LBP.
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Affiliation(s)
- Maria Dehli Vigeland
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway. .,Faculty of Medicine, University of Oslo, Oslo, Norway.
| | - Siri Tennebø Flåm
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - Magnus Dehli Vigeland
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - Ansgar Espeland
- Department of Radiology, Haukeland University Hospital, Bergen, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Per Martin Kristoffersen
- Department of Radiology, Haukeland University Hospital, Bergen, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Nils Vetti
- Department of Radiology, Haukeland University Hospital, Bergen, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Monica Wigemyr
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway
| | - Lars Christian Haugli Bråten
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway
| | - Elisabeth Gjefsen
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | | | | | - Anne Froholdt
- Department of Physical Medicine and Rehabilitation, Drammen Hospital, Drammen, Norway
| | - Jan Sture Skouen
- Department of Physical Medicine and Rehabilitation, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - John-Anker Zwart
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Kjersti Storheim
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Department of Physiotherapy, Oslo Metropolitan University, Oslo, Norway
| | - Linda Margareth Pedersen
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Department of Physiotherapy, Oslo Metropolitan University, Oslo, Norway
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6
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Jiao D, Qi L, Hu L, Hu D, Li X, Li G, Li Z, Liu S, Zhao C, Wu H. Changes in aging-induced kidney dysfunction in mice based on a metabolomics analysis. Front Endocrinol (Lausanne) 2022; 13:959311. [PMID: 36157455 PMCID: PMC9492839 DOI: 10.3389/fendo.2022.959311] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Kidney dysfunction is particularly important in systemic organ injuries caused by aging. Metabolomics are utilized in this study to explore the mechanism of kidney dysfunction during aging by the identification of metabolites and the characterization of metabolic pathways. We analyzed the serum biochemistry and kidney histopathology of male Kunming mice aged 3 months and 24 months and found that the aged mice had inflammatory lesions, aggravated fibrosis, and functional impairment. A high-resolution untargeted metabolomics analysis revealed that the endogenous metabolites in the kidneys and urine of the mice were significantly changed by 25 and 20 metabolites, respectively. A pathway analysis of these differential metabolites revealed six key signaling pathways, namely, D-glutamine and D-glutamate metabolism, purine metabolism, the citrate cycle [tricarboxylic acid (TCA) cycle], histidine metabolism, pyruvate metabolism, and glyoxylate and dicarboxylate metabolism. These pathways are involved in amino acid metabolism, carbohydrate metabolism, and nucleotide metabolism, and these can lead to immune regulation, inflammatory responses, oxidative stress damage, cellular dysfunction, and bioenergy disorders, and they are closely associated with aging and kidney insufficiency. We also screened nine types of sensitive metabolites in the urine as potential biomarkers of kidney dysfunction during the aging process to confirm their therapeutic targets in senior-induced kidney dysfunction and to improve the level of risk assessment for senile kidney injury.
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Affiliation(s)
- Danli Jiao
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li Qi
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li Hu
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Dan Hu
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiao Li
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Guona Li
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory of Acupuncture and Immunological Effects, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zheying Li
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shimin Liu
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chen Zhao
- School of Acupuncture-Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Chen Zhao, ; Huangan Wu,
| | - Huangan Wu
- Key Laboratory of Acupuncture and Immunological Effects, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Chen Zhao, ; Huangan Wu,
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7
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Biringer RG. Endocannabinoid signaling pathways: beyond CB1R and CB2R. J Cell Commun Signal 2021; 15:335-360. [PMID: 33978927 PMCID: PMC8222499 DOI: 10.1007/s12079-021-00622-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/27/2021] [Indexed: 12/15/2022] Open
Abstract
The search for cannabinoid receptors other than CB1R and CB2R has been ongoing for over a decade. A number of orphan receptors have been proposed as potential cannabinoid receptors primarily based on phylogenic arguments and reactivity towards known endocannabinoids and phytocannabinoids. Seven putative cannabinoid receptors are described and discussed, and evidence for and against their inclusion in this category are presented.
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Affiliation(s)
- Roger Gregory Biringer
- College of Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Bradenton, FL, 34211, USA.
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8
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Function and therapeutic potential of N-acyl amino acids. Chem Phys Lipids 2021; 239:105114. [PMID: 34217720 DOI: 10.1016/j.chemphyslip.2021.105114] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/06/2021] [Accepted: 06/29/2021] [Indexed: 12/11/2022]
Abstract
N-acyl amino acids (NAAs) are amphiphilic molecules, with different potential fatty acid and head group moieties. NAAs are the largest family of anandamide congener lipids discovered to date. In recent years, several NAAs have been identified as potential ligands, engaging novel binding sites and mechanisms for modulation of membrane proteins such as G-protein coupled receptors (GPRs), nuclear receptors, ion channels, and transporters. NAAs play a key role in a variety of physiological functions as lipid signaling molecules. Understanding the structure, function roles, and pharmacological potential of these NAAs is still in its infancy, and the biochemical roles are also mostly unknown. This review will provide a summary of the literature on NAAs and emphasize their therapeutic potential.
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9
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Hermes DJ, Yadav-Samudrala BJ, Xu C, Paniccia JE, Meeker RB, Armstrong ML, Reisdorph N, Cravatt BF, Mackie K, Lichtman AH, Ignatowska-Jankowska BM, Lysle DT, Fitting S. GPR18 drives FAAH inhibition-induced neuroprotection against HIV-1 Tat-induced neurodegeneration. Exp Neurol 2021; 341:113699. [PMID: 33736974 PMCID: PMC8984429 DOI: 10.1016/j.expneurol.2021.113699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 02/05/2021] [Accepted: 03/11/2021] [Indexed: 02/03/2023]
Abstract
Human immunodeficiency virus type 1 (HIV-1) is known to provoke microglial immune responses which likely play a paramount role in the development of chronic neuroinflammatory conditions and neuronal damage related to HIV-1 associated neurocognitive disorders (HAND). In particular, HIV-1 Tat protein is a proinflammatory neurotoxin which predisposes neurons to synaptodendritic injury. Drugs targeting the degradative enzymes of endogenous cannabinoids have shown promise in reducing inflammation with minimal side effects in rodent models. Considering that markers of neuroinflammation can predict the extent of neuronal injury in HAND patients, we evaluated the neurotoxic effect of HIV-1 Tat-exposed microglia following blockade of fatty acid amid hydrolyze (FAAH), a catabolic enzyme responsible for degradation of endocannabinoids, e.g. anandamide (AEA). In the present study, cultured murine microglia were incubated with Tat and/or a FAAH inhibitor (PF3845). After 24 h, cells were imaged for morphological analysis and microglial conditioned media (MCM) was collected. Frontal cortex neuron cultures (DIV 7–11) were then exposed to MCM, and neurotoxicity was assessed via live cell calcium imaging and staining of actin positive dendritic structures. Results demonstrate a strong attenuation of microglial responses to Tat by PF3845 pretreatment, which is indicated by 1) microglial changes in morphology to a less proinflammatory phenotype using fractal analysis, 2) a decrease in release of neurotoxic cytokines/chemokines (MCP-1/CCL2) and matrix metalloproteinases (MMPs; MMP-9) using ELISA/multiplex assays, and 3) enhanced production of endocannabinoids (AEA) using LC/MS/MS. Additionally, PF3845’s effects on Tat-induced microglial-mediated neurotoxicity, decreased dysregulation of neuronal intracellular calcium and prevented the loss of actin-positive staining and punctate structure in frontal cortex neuron cultures. Interestingly, these observed neuroprotective effects appeared to be independent of cannabinoid receptor activity (CB1R & CB2R). We found that a purported GPR18 antagonist, CID-85469571, blocked the neuroprotective effects of PF3845 in all experiments. Collectively, these experiments increase understanding of the role of FAAH inhibition and Tat in mediating microglial neurotoxicity in the HAND condition.
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Affiliation(s)
- Douglas J Hermes
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.
| | - Barkha J Yadav-Samudrala
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Changqing Xu
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Jacqueline E Paniccia
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Rick B Meeker
- Department of Neurology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Michael L Armstrong
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Denver, CO, United States of America
| | - Nichole Reisdorph
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Denver, CO, United States of America
| | - Benjamin F Cravatt
- Department of Chemistry, Scripps Research Institute, La Jolla, CA, United States of America
| | - Ken Mackie
- Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN, United States of America
| | - Aron H Lichtman
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA, United States of America
| | | | - Donald T Lysle
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Sylvia Fitting
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.
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10
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Fabisiak A, Fabisiak N, Mokrowiecka A, Malecka-Panas E, Jacenik D, Kordek R, Zielińska M, Kieć-Kononowicz K, Fichna J. Novel selective agonist of GPR18, PSB-KK-1415 exerts potent anti-inflammatory and anti-nociceptive activities in animal models of intestinal inflammation and inflammatory pain. Neurogastroenterol Motil 2021; 33:e14003. [PMID: 33058313 DOI: 10.1111/nmo.14003] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND GPR18 is a recently deorphanized receptor which was reported to act with several endogenous cannabinoid ligands. Here, we aimed to describe the role of GPR18 in intestinal inflammation and inflammatory pain. METHODS The anti-inflammatory activity of selective GPR18 agonist, PSB-KK-1415, and antagonist, PSB-CB5, was characterized in semi-chronic and chronic mouse models of colitis induced by 2,4,6-trinitrobenzenesulfonic acid (TNBS). The extent of inflammation was evaluated based on the macroscopic and microscopic scores, quantification of myeloperoxidase (MPO) activity, and Western blot analyses of tumor necrosis factor-α (TNF-α) and interleukin-6 in colonic tissue. The expression of GPR18 in colonic samples from patients with Crohn's disease (CD) was quantified using real-time PCR. The anti-nociceptive potential of the agonist in intestinal inflammation was evaluated in the mouse model of inflammatory pain. KEY RESULTS In semi-chronic colitis, PSB-KK-1415 reduced macroscopic score (1.79 ± 0.22 vs. 2.61 ± 0.48), expression of TNF-α (1.89 ± 0.36 vs. 2.83 ± 0.64), and microscopic score (5.00 ± 0.33 vs. 6.45 ± 0.40), all compared to mice with colitis. In chronic colitis, PSB-KK-1415 decreased macroscopic score (3.33 ± 1.26 vs. 4.00 ± 1.32) and MPO activity (32.23 ± 8.51 vs. 41.33 ± 11.64) compared to inflamed mice. In the mouse model of inflammatory pain, PSB-KK-1415 decreased the number of pain-induced behaviors in both, controls (32.60 ± 2.54 vs. 58.00 ± 6.24) and inflamed mice (60.83 ± 2.85 vs. 85.00 ± 5.77) compared to animals without treatment with PSB-KK-1415 (P < 0.005 for both). Lastly, we showed an increased expression of GPR18 in CD patients compared to healthy controls (3.77 ± 1.46 vs. 2.38 ± 0.66, p = 0.87). CONCLUSIONS & INFERENCES We showed that GPR18 is worth considering as a potential treatment target in intestinal inflammation and inflammatory pain.
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Affiliation(s)
- Adam Fabisiak
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Lodz, Poland.,Department of Digestive Tract Diseases, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Natalia Fabisiak
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Lodz, Poland.,Department of Gastroenterology, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Anna Mokrowiecka
- Department of Digestive Tract Diseases, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Ewa Malecka-Panas
- Department of Digestive Tract Diseases, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Damian Jacenik
- Department of Cytobiochemistry, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Radzislaw Kordek
- Department of Pathology, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Marta Zielińska
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
| | - Katarzyna Kieć-Kononowicz
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Krakow, Poland
| | - Jakub Fichna
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, Lodz, Poland
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11
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Casati S, Giannasi C, Niada S, Bergamaschi RF, Orioli M, Brini AT. Bioactive Lipids in MSCs Biology: State of the Art and Role in Inflammation. Int J Mol Sci 2021; 22:1481. [PMID: 33540695 PMCID: PMC7867257 DOI: 10.3390/ijms22031481] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 12/11/2022] Open
Abstract
Lipidomics is a lipid-targeted metabolomics approach that aims to the comprehensive analysis of lipids in biological systems in order to highlight the specific functions of lipid species in health and disease. Lipids play pivotal roles as they are major structural components of the cellular membranes and energy storage molecules but also, as most recently shown, they act as functional and regulatory components of intra- and intercellular signaling. Herein, emphasis is given to the recently highlighted roles of specific bioactive lipids species, as polyunsaturated fatty acids (PUFA)-derived mediators (generally known as eicosanoids), endocannabinoids (eCBs), and lysophospholipids (LPLs), and their involvement in the mesenchymal stem cells (MSCs)-related inflammatory scenario. Indeed, MSCs are a heterogenous population of multipotent cells that have attracted much attention for their potential in regulating inflammation, immunomodulatory capabilities, and reparative roles. The lipidomics of the inflammatory disease osteoarthritis (OA) and the influence of MSCs-derived lipids have also been addressed.
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Affiliation(s)
- Sara Casati
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, 20133 Milan, Italy; (C.G.); (R.F.B.); (M.O.); (A.T.B.)
| | - Chiara Giannasi
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, 20133 Milan, Italy; (C.G.); (R.F.B.); (M.O.); (A.T.B.)
- IRCCS Istituto Ortopedico Galeazzi, 20161 Milan, Italy;
| | | | - Roberta F. Bergamaschi
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, 20133 Milan, Italy; (C.G.); (R.F.B.); (M.O.); (A.T.B.)
| | - Marica Orioli
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, 20133 Milan, Italy; (C.G.); (R.F.B.); (M.O.); (A.T.B.)
| | - Anna T. Brini
- Dipartimento di Scienze Biomediche, Chirurgiche ed Odontoiatriche, Università degli Studi di Milano, 20133 Milan, Italy; (C.G.); (R.F.B.); (M.O.); (A.T.B.)
- IRCCS Istituto Ortopedico Galeazzi, 20161 Milan, Italy;
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12
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Vanderwall AG, Milligan ED. Cytokines in Pain: Harnessing Endogenous Anti-Inflammatory Signaling for Improved Pain Management. Front Immunol 2019; 10:3009. [PMID: 31921220 PMCID: PMC6935995 DOI: 10.3389/fimmu.2019.03009] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 12/09/2019] [Indexed: 12/20/2022] Open
Abstract
Current pain therapeutics offer inadequate relief to patients with chronic pain. A growing literature supports that pro-inflammatory cytokine signaling between immune, glial, and neural cells is integral to the development of pathological pain. Modulation of these communications may hold the key to improved pain management. In this review we first offer an overview of the relationships between pro-inflammatory cytokine and chemokine signaling and pathological pain, with a focus on the actions of cytokines and chemokines in communication between glia (astrocytes and microglia), immune cells (macrophages and T cells), and neurons. These interactions will be discussed in relation to both peripheral and central nervous system locations. Several novel non-neuronal drug targets for controlling pain are emerging as highly promising, including non-viral IL-10 gene therapy, which offer the potential for substantial pain relief through localized modulation of targeted cytokine pathways. Preclinical investigation of the mechanisms underlying the success of IL-10 gene therapy revealed the unexpected discovery of the powerful anti-nociceptive anti-inflammatory properties of D-mannose, an adjuvant in the non-viral gene therapeutic formulation. This review will include gene therapeutic approaches showing the most promise in controlling pro-inflammatory signaling via increased expression of anti-inflammatory cytokines like interleukin-10 (IL-10) or IL-4, or by directly limiting the bioavailability of specific pro-inflammatory cytokines, as with tumor necrosis factor (TNF) by the TNF soluble receptor (TNFSR). Approaches that increase endogenous anti-inflammatory signaling may offer additional opportunities for pain therapeutic development in patients not candidates for gene therapy. Promising novel avenues discussed here include the disruption of lymphocyte function-associated antigen (LFA-1) activity, antagonism at the cannabinoid 2 receptor (CB2R), and toll-like receptor 4 (TLR4) antagonism. Given the partial efficacy of current drugs, new strategies to manipulate neuroimmune and cytokine interactions hold considerable promise.
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Affiliation(s)
- Arden G. Vanderwall
- Department of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM, United States
- Department of Anesthesiology and Critical Care, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Erin D. Milligan
- Department of Neurosciences, University of New Mexico School of Medicine, Albuquerque, NM, United States
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13
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Battista N, Bari M, Bisogno T. N-Acyl Amino Acids: Metabolism, Molecular Targets, and Role in Biological Processes. Biomolecules 2019; 9:biom9120822. [PMID: 31817019 PMCID: PMC6995544 DOI: 10.3390/biom9120822] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/18/2019] [Accepted: 11/29/2019] [Indexed: 12/21/2022] Open
Abstract
The lipid signal is becoming increasingly crowded as increasingly fatty acid amide derivatives are being identified and considered relevant therapeutic targets. The identification of N-arachidonoyl-ethanolamine as endogenous ligand of cannabinoid type-1 and type-2 receptors as well as the development of different–omics technologies have the merit to have led to the discovery of a huge number of naturally occurring N-acyl-amines. Among those mediators, N-acyl amino acids, chemically related to the endocannabinoids and belonging to the complex lipid signaling system now known as endocannabinoidome, have been rapidly growing for their therapeutic potential. Here, we review the current knowledge of the mechanisms for the biosynthesis and inactivation of the N-acyl amino acids, as well as the various molecular targets for some of the N-acyl amino acids described so far.
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Affiliation(s)
- Natalia Battista
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy
- Correspondence: (N.B.); (M.B.); (T.B.)
| | - Monica Bari
- Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
- Correspondence: (N.B.); (M.B.); (T.B.)
| | - Tiziana Bisogno
- Endocannabinoid Research Group, Institute of Translational Pharmacology, National Research Council, 00133 Rome, Italy
- Correspondence: (N.B.); (M.B.); (T.B.)
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14
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Abstract
Cannabis is increasingly being used world-wide to treat a variety of dermatological conditions. Medicinal cannabis is currently legalized in Canada, 31 states in America and 19 countries in Europe. The authors reviewed the literature on the pharmacology and use of cannabinoids in treating a variety of skin conditions including acne, atopic dermatitis, psoriasis, skin cancer, pruritus, and pain. Cannabinoids have demonstrated anti-inflammatory, antipruritic, anti-ageing, and antimalignancy properties by various mechanisms including interacting with the newly found endocannabinoid system of the skin thereby providing a promising alternative to traditional treatments.
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Affiliation(s)
| | - Matthew J Lin
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Danielle Dubin
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
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15
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Abstract
Research in the cannabinoid field, namely on phytocannabinoids, the endogenous cannabinoids anandamide and 2-arachidonoyl glycerol and their metabolizing and synthetic enzymes, the cannabinoid receptors, and anandamide-like cannabinoid compounds, has expanded tremendously over the last few years. Numerous endocannabinoid-like compounds have been discovered. The Cannabis plant constituent cannabidiol (CBD) was found to exert beneficial effects in many preclinical disease models ranging from epilepsy, cardiovascular disease, inflammation, and autoimmunity to neurodegenerative and kidney diseases and cancer. CBD was recently approved in the United States for the treatment of rare forms of childhood epilepsy. This has triggered the development of many CBD-based products for human use, often with overstated claims regarding their therapeutic effects. In this article, the recently published research on the chemistry and biological effects of plant cannabinoids (specifically CBD), endocannabinoids, certain long-chain fatty acid amides, and the variety of relevant receptors is critically reviewed.
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Affiliation(s)
- Pal Pacher
- Laboratory of Cardiovascular Physiology and Tissue Injury and National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland 20852, USA;
| | - Natalya M Kogan
- Institute for Drug Research, Faculty of Medicine, Hebrew University, Jerusalem 9112102, Israel;
| | - Raphael Mechoulam
- Institute for Drug Research, Faculty of Medicine, Hebrew University, Jerusalem 9112102, Israel;
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16
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Petrie GN, Wills KL, Piscitelli F, Smoum R, Limebeer CL, Rock EM, Humphrey AE, Sheppard-Perkins M, Lichtman AH, Mechoulam R, Di Marzo V, Parker LA. Oleoyl glycine: interference with the aversive effects of acute naloxone-precipitated MWD, but not morphine reward, in male Sprague-Dawley rats. Psychopharmacology (Berl) 2019; 236:2623-2633. [PMID: 30993360 DOI: 10.1007/s00213-019-05237-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/19/2019] [Indexed: 12/18/2022]
Abstract
RATIONALE Oleoyl glycine (OlGly), a recently discovered fatty acid amide that is structurally similar to N- acylethanolamines, which include the endocannabinoid, anandamide (AEA), as well as endogenous peroxisome proliferator-activated receptor alpha (PPARα) agonists oleoylethanolamide (OEA) and palmitoylethanolamide (PEA), has been shown to interfere with nicotine reward and dependence in mice. OBJECTIVES AND METHODS Behavioral and molecular techniques were used to investigate the ability of OlGly to interfere with the affective properties of morphine and morphine withdrawal (MWD) in male Sprague-Dawley rats. RESULTS Synthetic OlGly (1-30 mg/kg, intraperitoneal [ip]) produced neither a place preference nor aversion on its own; however, at doses of 1 and 5 mg/kg, ip, it blocked the aversive effects of MWD in a place aversion paradigm. This effect was reversed by the cannabinoid 1 (CB1) receptor antagonist, AM251 (1 mg/kg, ip), but not the PPARα antagonist, MK886 (1 mg/kg, ip). OlGly (5 or 30 mg/kg, ip) did not interfere with a morphine-induced place preference or reinstatement of a previously extinguished morphine-induced place preference. Ex vivo analysis of tissue (nucleus accumbens, amygdala, prefrontal cortex, and interoceptive insular cortex) collected from rats experiencing naloxone-precipitated MWD revealed that OlGly was selectively elevated in the nucleus accumbens. MWD did not modify levels of the endocannabinoids 2-AG and AEA, nor those of the PPARα ligands, OEA and PEA, in any region evaluated. CONCLUSION Here, we show that OlGly interferes with the aversive properties of acute naloxone-precipitated morphine withdrawal in rats. These results suggest that OlGly may reduce the impact of MWD and may possess efficacy in treating opiate withdrawal.
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Affiliation(s)
- Gavin N Petrie
- Department of Psychology and Collaborative, University of Guelph, Guelph, Ontario, N1H 2GW, Canada
| | - Kiri L Wills
- Department of Psychology and Collaborative, University of Guelph, Guelph, Ontario, N1H 2GW, Canada
| | - Fabiana Piscitelli
- Institute of Biomolecular Chemistry, Endocannabinoid Research Group, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy
| | - Reem Smoum
- Institute for Drug Research, Medical Faculty, Hebrew University, Jerusalem, Israel
| | - Cheryl L Limebeer
- Department of Psychology and Collaborative, University of Guelph, Guelph, Ontario, N1H 2GW, Canada
| | - Erin M Rock
- Department of Psychology and Collaborative, University of Guelph, Guelph, Ontario, N1H 2GW, Canada
| | - Ashlyn E Humphrey
- Department of Psychology and Collaborative, University of Guelph, Guelph, Ontario, N1H 2GW, Canada
| | | | - Aron H Lichtman
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Raphael Mechoulam
- Institute for Drug Research, Medical Faculty, Hebrew University, Jerusalem, Israel
| | - Vincenzo Di Marzo
- Institute of Biomolecular Chemistry, Endocannabinoid Research Group, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy
| | - Linda A Parker
- Department of Psychology and Collaborative, University of Guelph, Guelph, Ontario, N1H 2GW, Canada.
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17
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Burstein SH. Eicosanoid mediation of cannabinoid actions. Bioorg Med Chem 2019; 27:2718-2728. [DOI: 10.1016/j.bmc.2019.05.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 05/08/2019] [Accepted: 05/11/2019] [Indexed: 12/26/2022]
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18
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Grabiec U, Hohmann T, Ghadban C, Rothgänger C, Wong D, Antonietti A, Groth T, Mackie K, Dehghani F. Protective Effect of N-Arachidonoyl Glycine-GPR18 Signaling after Excitotoxical Lesion in Murine Organotypic Hippocampal Slice Cultures. Int J Mol Sci 2019; 20:ijms20061266. [PMID: 30871175 PMCID: PMC6470786 DOI: 10.3390/ijms20061266] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/06/2019] [Accepted: 03/09/2019] [Indexed: 12/25/2022] Open
Abstract
N-arachidonoyl glycine (NAGly) is an endocannabinoid involved in the regulation of different immune cells. It was shown to activate the GPR18 receptor, which was postulated to switch macrophages from cytotoxic to reparative. To study GPR18 expression and neuroprotection after NAGly treatment we used excitotoxically lesioned organotypic hippocampal slice cultures (OHSC). The effect of NAGly was also tested in isolated microglia and astrocytes as these cells play a crucial role during neuronal injury. In the present study, the GPR18 receptor was found in OHSC at mRNA level and was downregulated after N-Methyl-D-aspartate (NMDA) treatment at a single time point. Furthermore, treatment with NAGly reduced neuronal damage and this effect was abolished by GPR18 and cannabinoid receptor (CB)2 receptor antagonists. The activation but not motility of primary microglia and astrocytes was influenced when incubated with NAGly. However, NAGly alone reduced the phosphorylation of Akt but no changes in activation of the p44/42 and p38 MAPK and CREB pathways in BV2 cells could be observed. Given NAGly mediated actions we speculate that GPR18 and its ligand NAGly are modulators of glial and neuronal cells during neuronal damage.
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Affiliation(s)
- Urszula Grabiec
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
| | - Tim Hohmann
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
| | - Chalid Ghadban
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
| | - Candy Rothgänger
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
| | - Daniel Wong
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
| | - Alexandra Antonietti
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
| | - Thomas Groth
- Biomedical Materials Group, Institute of Pharmacy & Interdisciplinary Center for Materials Science, Martin Luther University Halle-Wittenberg, Heinrich-Damerow Strasse 4, 06120 Halle (Saale), Germany.
| | - Ken Mackie
- Department of Psychological & Brain Sciences, Indiana University, 1101 E. 10th, Bloomington, IN 47405, USA.
| | - Faramarz Dehghani
- Institute of Anatomy and Cell Biology, Medical Faculty of Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany.
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Guerrero-Alba R, Barragán-Iglesias P, González-Hernández A, Valdez-Moráles EE, Granados-Soto V, Condés-Lara M, Rodríguez MG, Marichal-Cancino BA. Some Prospective Alternatives for Treating Pain: The Endocannabinoid System and Its Putative Receptors GPR18 and GPR55. Front Pharmacol 2019; 9:1496. [PMID: 30670965 PMCID: PMC6331465 DOI: 10.3389/fphar.2018.01496] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 12/07/2018] [Indexed: 12/12/2022] Open
Abstract
Background: Marijuana extracts (cannabinoids) have been used for several millennia for pain treatment. Regarding the site of action, cannabinoids are highly promiscuous molecules, but only two cannabinoid receptors (CB1 and CB2) have been deeply studied and classified. Thus, therapeutic actions, side effects and pharmacological targets for cannabinoids have been explained based on the pharmacology of cannabinoid CB1/CB2 receptors. However, the accumulation of confusing and sometimes contradictory results suggests the existence of other cannabinoid receptors. Different orphan proteins (e.g., GPR18, GPR55, GPR119, etc.) have been proposed as putative cannabinoid receptors. According to their expression, GPR18 and GPR55 could be involved in sensory transmission and pain integration. Methods: This article reviews select relevant information about the potential role of GPR18 and GPR55 in the pathophysiology of pain. Results: This work summarized novel data supporting that, besides cannabinoid CB1 and CB2 receptors, GPR18 and GPR55 may be useful for pain treatment. Conclusion: There is evidence to support an antinociceptive role for GPR18 and GPR55.
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Affiliation(s)
- Raquel Guerrero-Alba
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Paulino Barragán-Iglesias
- School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, University of Texas at Dallas, Richardson, TX, United States
| | - Abimael González-Hernández
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Santiago de Querétaro, Mexico
| | - Eduardo E Valdez-Moráles
- Cátedras CONACYT, Departamento de Cirugía, Centro de Ciencias Biomédicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Vinicio Granados-Soto
- Neurobiology of Pain Laboratory, Departamento de Farmacobiología, Cinvestav, Mexico City, Mexico
| | - Miguel Condés-Lara
- Departamento de Neurobiología del Desarrollo y Neurofisiología, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Santiago de Querétaro, Mexico
| | - Martín G Rodríguez
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Bruno A Marichal-Cancino
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
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20
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Abstract
Cannabinoids influence cardiovascular variables in health and disease via multiple mechanisms. The chapter covers the impact of cannabinoids on cardiovascular function in physiology and pathology and presents a critical analysis of the proposed signalling pathways governing regulation of cardiovascular function by endogenously produced and exogenous cannabinoids. We know that endocannabinoid system is overactivated under pathological conditions and plays both a protective compensatory role, such as in some forms of hypertension, atherosclerosis and other inflammatory conditions, and a pathophysiological role, such as in disease states associated with excessive hypotension. This chapter focuses on the mechanisms affecting hemodynamics and vasomotor effects of cannabinoids in health and disease states, highlighting mismatches between some studies. The chapter will first review the effects of marijuana smoking on cardiovascular system and then describe the impact of exogenous cannabinoids on cardiovascular parameters in humans and experimental animals. This will be followed by analysis of the impact of cannabinoids on reactivity of isolated vessels. The article critically reviews current knowledge on cannabinoid induction of vascular relaxation by cannabinoid receptor-dependent and -independent mechanisms and dysregulation of vascular endocannabinoid signaling in disease states.
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Affiliation(s)
- Alexander I Bondarenko
- Circulatory Physiology Department, Bogomoletz Institute of Physiology National Academy of Sciences of Ukraine, Kiev, Ukraine.
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21
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Reyes-Resina I, Navarro G, Aguinaga D, Canela EI, Schoeder CT, Załuski M, Kieć-Kononowicz K, Saura CA, Müller CE, Franco R. Molecular and functional interaction between GPR18 and cannabinoid CB 2 G-protein-coupled receptors. Relevance in neurodegenerative diseases. Biochem Pharmacol 2018; 157:169-179. [PMID: 29870711 DOI: 10.1016/j.bcp.2018.06.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 11/29/2022]
Abstract
GPR18, still considered an orphan receptor, may respond to endocannabinoids, whose canonical receptors are CB1 and CB2. GPR18 and CB2 receptors share a role in peripheral immune response regulation and are co-expressed in microglia, which are immunocompetent cells in the central nervous system (CNS). We aimed at identifying heteroreceptor complexes formed by GPR18 and CB1R or CB2R in resting and activated microglia. Receptor-receptor interaction was assessed using energy-transfer approaches, and receptor function by determining cAMP levels and ERK1/2 phosphorylation in heterologous cells and primary cultures of microglia. Heteroreceptor identification in primary cultures of microglia was achieved by in situ proximity ligation assays. Energy transfer results showed interaction of GPR18 with CB2R but not with CB1R. CB2-GPR18 heteroreceptor complexes displayed particular functional properties (heteromer prints) often consisting of negative cross-talk (activation of one receptor reduces signaling arising from the partner receptor) and cross-antagonism (the response of one of the receptors is blocked by a selective antagonist of the partner receptor). Activated microglia showed the heteromer print (negative cross-talk and bidirectional cross-antagonism) and increased expression of CB2R and GPR18. Due to the important role of CB2R in neuroprotection, we further investigated heteroreceptor occurrence in primary cultures of microglia from transgenic mice overexpressing human APPSw,Ind, an Alzheimer's disease model. Microglial cells from transgenic mice showed the heteromer print and functional interactions that were similar to those found in cells from wild-type animals that were activated by treatment with lipopolysaccharide and interferon-γ. Our results suggest that GPR18 and its heteromers may play important roles in neurodegenerative processes.
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Affiliation(s)
- Irene Reyes-Resina
- Molecular Neurobiology Laboratory, Department of Biochemistry and Molecular Biomedicine, University of Barcelona, Diagonal 643, 08028 Barcelona, Spain; Centro de Investigación en Red, Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, C/ Sinesio Delgado, 4, 28029 Madrid, Spain
| | - Gemma Navarro
- Centro de Investigación en Red, Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, C/ Sinesio Delgado, 4, 28029 Madrid, Spain; Department of Biochemistry and Physiology, School of Pharmacy, University of Barcelona, Barcelona, Spain.
| | - David Aguinaga
- Molecular Neurobiology Laboratory, Department of Biochemistry and Molecular Biomedicine, University of Barcelona, Diagonal 643, 08028 Barcelona, Spain; Centro de Investigación en Red, Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, C/ Sinesio Delgado, 4, 28029 Madrid, Spain
| | - Enric I Canela
- Molecular Neurobiology Laboratory, Department of Biochemistry and Molecular Biomedicine, University of Barcelona, Diagonal 643, 08028 Barcelona, Spain; Centro de Investigación en Red, Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, C/ Sinesio Delgado, 4, 28029 Madrid, Spain
| | - Clara T Schoeder
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | - Michał Załuski
- Dept. Technology & Biotechnol. of Drugs, Jagiellonian University Medical College, PL 30-688 Kraków, Poland
| | - Katarzyna Kieć-Kononowicz
- Dept. Technology & Biotechnol. of Drugs, Jagiellonian University Medical College, PL 30-688 Kraków, Poland
| | - Carlos A Saura
- Centro de Investigación en Red, Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, C/ Sinesio Delgado, 4, 28029 Madrid, Spain; Institut de Neurociències, Department de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Campus Bellaterra, Av. Can Domenech, s/n, 08193 Bellaterra, Spain
| | - Christa E Müller
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | - Rafael Franco
- Molecular Neurobiology Laboratory, Department of Biochemistry and Molecular Biomedicine, University of Barcelona, Diagonal 643, 08028 Barcelona, Spain; Centro de Investigación en Red, Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, C/ Sinesio Delgado, 4, 28029 Madrid, Spain.
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22
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Motwani MP, Colas RA, George MJ, Flint JD, Dalli J, Richard-Loendt A, De Maeyer RP, Serhan CN, Gilroy DW. Pro-resolving mediators promote resolution in a human skin model of UV-killed Escherichia coli-driven acute inflammation. JCI Insight 2018; 3:94463. [PMID: 29563331 PMCID: PMC5926908 DOI: 10.1172/jci.insight.94463] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 02/20/2018] [Indexed: 12/22/2022] Open
Abstract
While the treatment of inflammatory disorders is generally based on inhibiting factors that drive onset of inflammation, these therapies can compromise healing (NSAIDs) or dampen immunity against infections (biologics). In search of new antiinflammatories, efforts have focused on harnessing endogenous pathways that drive resolution of inflammation for therapeutic gain. Identification of specialized pro-resolving mediators (SPMs) (lipoxins, resolvins, protectins, maresins) as effector molecules of resolution has shown promise in this regard. However, their action on inflammatory resolution in humans is unknown. Here, we demonstrate using a model of UV-killed Escherichia coli–triggered skin inflammation that SPMs are biosynthesized at the local site at the start of resolution, coinciding with the expression of receptors that transduce their actions. These include receptors for lipoxin A4 (ALX/FPR2), resolvin E1 (ChemR23), resolvin D2 (GPR18), and resolvin D1 (GPR32) that were differentially expressed on the endothelium and infiltrating leukocytes. Administering SPMs into the inflamed site 4 hours after bacterial injection caused a reduction in PMN numbers over the ensuing 6 hours, the phase of active resolution in this model. These results indicate that in humans, the appearance of SPMs and their receptors is associated with the beginning of inflammatory resolution and that their therapeutic supplementation enhanced the resolution response. In humans, the appearance of specialized pro-resolving lipid mediators and their receptors is associated with the start of inflammatory resolution.
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Affiliation(s)
- Madhur P Motwani
- Centre for Clinical Pharmacology and Therapeutics, Division of Medicine, University College London, London, United Kingdom
| | - Romain A Colas
- Lipid Mediator Unit, Biochemical Pharmacology, William Harvey Research Institute, Bart's and the London School of Medicine, Queen Mary University of London, London, United Kingdom
| | - Marc J George
- Centre for Clinical Pharmacology and Therapeutics, Division of Medicine, University College London, London, United Kingdom
| | - Julia D Flint
- Centre for Clinical Pharmacology and Therapeutics, Division of Medicine, University College London, London, United Kingdom
| | - Jesmond Dalli
- Lipid Mediator Unit, Biochemical Pharmacology, William Harvey Research Institute, Bart's and the London School of Medicine, Queen Mary University of London, London, United Kingdom
| | - Angela Richard-Loendt
- Division of Neuropathology and, Department of Neurodegenerative Disease, University College London Institute of Neurology, London, United Kingdom
| | - Roel Ph De Maeyer
- Centre for Clinical Pharmacology and Therapeutics, Division of Medicine, University College London, London, United Kingdom
| | - Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Derek W Gilroy
- Centre for Clinical Pharmacology and Therapeutics, Division of Medicine, University College London, London, United Kingdom
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23
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Donvito G, Piscitelli F, Muldoon P, Jackson A, Vitale RM, D'Aniello E, Giordano C, Ignatowska-Jankowska BM, Mustafa MA, Guida F, Petrie GN, Parker L, Smoum R, Sim-Selley L, Maione S, Lichtman AH, Damaj MI, Di Marzo V, Mechoulam R. N-Oleoyl-glycine reduces nicotine reward and withdrawal in mice. Neuropharmacology 2018; 148:320-331. [PMID: 29567093 DOI: 10.1016/j.neuropharm.2018.03.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 03/01/2018] [Accepted: 03/17/2018] [Indexed: 01/21/2023]
Abstract
Cigarette smokers with brain damage involving the insular cortex display cessation of tobacco smoking, suggesting that this region may contribute to nicotine addiction. In the present study, we speculated that molecules in the insular cortex that are sensitive to experimental traumatic brain injury (TBI) in mice might provide leads to ameliorate nicotine addiction. Using targeted lipidomics, we found that TBI elicited substantial increases of a largely uncharacterized lipid, N-acyl-glycine, N-oleoyl-glycine (OlGly), in the insular cortex of mice. We then evaluated whether intraperitoneal administration of OlGly would alter withdrawal responses in nicotine-dependent mice as well as the rewarding effects of nicotine, as assessed in the conditioned place preference paradigm (CPP). Systemic administration of OlGly reduced mecamylamine-precipitated withdrawal responses in nicotine-dependent mice and prevented nicotine CPP. However, OlGly did not affect morphine CPP, demonstrating a degree of selectivity. Our respective in vitro and in vivo observations that OlGly activated peroxisome proliferator-activated receptor alpha (PPAR-α) and the PPAR-α antagonist GW6471 prevented the OlGly-induced reduction of nicotine CPP in mice suggests that this lipid acts as a functional PPAR-α agonist to attenuate nicotine reward. These findings raise the possibility that the long chain fatty acid amide OlGly may possess efficacy in treating nicotine addiction.
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Affiliation(s)
- Giulia Donvito
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Fabiana Piscitelli
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy
| | - Pretal Muldoon
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Asti Jackson
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Rosa Maria Vitale
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy
| | - Enrico D'Aniello
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Catia Giordano
- Endocannabinoid Research Group, Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Naples, Italy
| | - Bogna M Ignatowska-Jankowska
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Mohammed A Mustafa
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Francesca Guida
- Endocannabinoid Research Group, Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Naples, Italy
| | - Gavin N Petrie
- Department of Psychology and Collaborative Neuroscience Graduate Program, University of Guelph, Guelph, ON, Canada
| | - Linda Parker
- Department of Psychology and Collaborative Neuroscience Graduate Program, University of Guelph, Guelph, ON, Canada
| | - Reem Smoum
- Institute for Drug Research, Medical Faculty, Hebrew University, Jerusalem, Israel
| | - Laura Sim-Selley
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Sabatino Maione
- Endocannabinoid Research Group, Department of Experimental Medicine, Section of Pharmacology, Second University of Naples, Naples, Italy
| | - Aron H Lichtman
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA; Department of Medicinal Chemistry, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.
| | - M Imad Damaj
- Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA.
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy.
| | - Raphael Mechoulam
- Institute for Drug Research, Medical Faculty, Hebrew University, Jerusalem, Israel
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24
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ANDERSON RYANL, MERKLER DAVIDJ. N-FATTY ACYLGLYCINES: UNDERAPPRECIATED ENDOCANNABINOID-LIKE FATTY ACID AMIDES? JOURNAL OF BIOLOGY AND NATURE 2018; 8:156-165. [PMID: 29607420 PMCID: PMC5878051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Long-chain N-fatty acylglycines, R-CO-NH-CH2-COOH (where "R" refers to an unsaturated or saturated alkyl chain of at least 14 carbons) are found in mammals and insects and are structurally related to the cell-signaling, lipid-like, N-fatty acylethanolamines, R-CO-NH-CH2-CH2-OH (where "R" refers to an alkyl chain of at least 14 carbons). Accumulating evidence demonstrates that the N-fatty acylglycines have important cellular functions, but much work remains in order to fully appreciate and understand these biomolecules including: (a) more work on their functions in vivo, (b) measuring their concentrations in the cell, (c) defining the pathways for the biosynthesis and degradation, and (d) understanding the metabolic interconversion(s) between the N-fatty acylglycines and other fatty acid amides. The purpose of reviewing the current state-of-knowledge about the N-fatty acylglycines is to stimulate future research about this intriguing family of biomolecules.
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Affiliation(s)
- RYAN L. ANDERSON
- Department of Chemistry, University of South Florida, Tampa FL33620, USA
| | - DAVID J. MERKLER
- Department of Chemistry, University of South Florida, Tampa FL33620, USA
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25
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Matouk AI, Taye A, El-Moselhy MA, Heeba GH, Abdel-Rahman AA. Abnormal cannabidiol confers cardioprotection in diabetic rats independent of glycemic control. Eur J Pharmacol 2017; 820:256-264. [PMID: 29274332 DOI: 10.1016/j.ejphar.2017.12.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 12/15/2017] [Accepted: 12/19/2017] [Indexed: 12/22/2022]
Abstract
Chronic GPR18 activation by its agonist abnormal cannabidiol (trans-4-[3-methyl-6-(1-methylethenyl)-2-cyclohexen-1-yl]-5-pentyl-1,3-benzenediol; abn-cbd) improves myocardial redox status and function in healthy rats. Here, we investigated the ability of abn-cbd to alleviate diabetes-evoked cardiovascular pathology and the contribution of GPR18 to this effect. Four weeks after diabetes induction by streptozotocin (STZ, 55mg/kg; i.p), male Wistar rats received abn-cbd, the GPR18 antagonist (1,3-dimethoxy-5-methyl-2-[(1R,6R)-3-methyl-6-(1-methylethenyl)-2-,cyclohexen-1-yl]benzene;O-1918), their combination (100µg/kg/day, i.p, each) or their vehicle for 2 weeks. Abn-cbd had no effect on diabetes-evoked cardiac hypertrophy or impaired glycemic control (hyperglycemia and hypoinsulinemia), but alleviated the associated reductions in left ventricular (LV) contractility (dP/dtmax) and relaxation (dP/dtmin) indices, and the increases in LV end diastolic pressure (LVEDP) and cardiac vagal dominance. Abn-cbd also reversed myocardial oxidative stress by restoring circulating and cardiac nitric oxide (NO) and adiponectin (ADN) levels and enhancing GPR18 expression and phosphorylation of Akt, ERK1/2 and eNOS in diabetic rats' hearts. Concurrent GPR18 blockade (O-1918) abrogated all favorable effects of abn-cbd in diabetic rats. Collectively, the current findings present evidence for abn-cbd alleviation of diabetes-evoked cardiovascular anomalies likely via GPR18 dependent restoration of cardiac adiponectin-Akt-eNOS signaling and the diminution of myocardial oxidative stress.
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Affiliation(s)
- Asmaa I Matouk
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, NC, USA
| | - Ashraf Taye
- Department of Pharmacology, Faculty of Pharmacy, Minia University, Egypt
| | | | - Gehan H Heeba
- Department of Pharmacology, Faculty of Pharmacy, Minia University, Egypt
| | - Abdel A Abdel-Rahman
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, NC, USA.
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26
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Burstein SH. N-Acyl Amino Acids (Elmiric Acids): Endogenous Signaling Molecules with Therapeutic Potential. Mol Pharmacol 2017; 93:228-238. [PMID: 29138268 DOI: 10.1124/mol.117.110841] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 11/10/2017] [Indexed: 12/27/2022] Open
Abstract
The subject of N-acyl amino acid conjugates has been rapidly growing in recent years, especially with regard to their analgesic and anti-inflammatory actions. The field comprises a large family of lipid signaling molecules whose importance is only now being fully realized. The most widely studied member is N-arachidonoyl glycine (NAGly), which differs structurally from the endocannabinoid anandamide (N-arachidonoyl ethanolamide) by a single oxygen atom even as the two are metabolically related. Topics that are covered in this minireview are: biosynthetic pathways for N-acyl amino acids, receptors for N-acyl amino acids, physiologic actions of N-acyl amino acids, pharmacological effects of N-acyl amino acids, and molecular mechanisms believed to be responsible for their effects. On the subject of mechanisms, we propose several possibilities whose basis is the currently available information. Four putative pathways can be suggested: 1) inhibition of fatty acid amide hydrolase-induced increases in anandamide or 2-arachidonoyl glycerol (2-AG) levels, resulting in analgesic activity; 2) binding to GPR18, initiating the production of anti-inflammatory eicosanoids (specifically, the data suggest roles for 15-deoxy-Δ12,14-prostaglandin-J2 and lipoxin A4, both of which are potent inflammation-resolving molecules); 3) inactivation of T-type Cav3 channels; and 4) inhibition of the GLYT2 glycine transporter. Each pathway would produce analgesic effects. Also, the N-acyl amino acids do not bind to either cannabinoid or opioid receptors, thus reducing adverse actions and making them good templates for novel drug candidate molecules.
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Affiliation(s)
- Sumner H Burstein
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts
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27
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Soderstrom K, Soliman E, Van Dross R. Cannabinoids Modulate Neuronal Activity and Cancer by CB1 and CB2 Receptor-Independent Mechanisms. Front Pharmacol 2017; 8:720. [PMID: 29066974 PMCID: PMC5641363 DOI: 10.3389/fphar.2017.00720] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 09/25/2017] [Indexed: 12/29/2022] Open
Abstract
Cannabinoids include the active constituents of Cannabis or are molecules that mimic the structure and/or function of these Cannabis-derived molecules. Cannabinoids produce many of their cellular and organ system effects by interacting with the well-characterized CB1 and CB2 receptors. However, it has become clear that not all effects of cannabinoid drugs are attributable to their interaction with CB1 and CB2 receptors. Evidence now demonstrates that cannabinoid agents produce effects by modulating activity of the entire array of cellular macromolecules targeted by other drug classes, including: other receptor types; ion channels; transporters; enzymes, and protein- and non-protein cellular structures. This review summarizes evidence for these interactions in the CNS and in cancer, and is organized according to the cellular targets involved. The CNS represents a well-studied area and cancer is emerging in terms of understanding mechanisms by which cannabinoids modulate their activity. Considering the CNS and cancer together allow identification of non-cannabinoid receptor targets that are shared and divergent in both systems. This comparative approach allows the identified targets to be compared and contrasted, suggesting potential new areas of investigation. It also provides insight into the diverse sources of efficacy employed by this interesting class of drugs. Obtaining a comprehensive understanding of the diverse mechanisms of cannabinoid action may lead to the design and development of therapeutic agents with greater efficacy and specificity for their cellular targets.
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Affiliation(s)
- Ken Soderstrom
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Eman Soliman
- Department of Pharmacology and Toxicology, Zagazig University, Zagazig, Egypt
| | - Rukiyah Van Dross
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
- Center for Health Disparities, East Carolina University, Greenville, NC, United States
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28
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Irving A, Abdulrazzaq G, Chan SLF, Penman J, Harvey J, Alexander SPH. Cannabinoid Receptor-Related Orphan G Protein-Coupled Receptors. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2017; 80:223-247. [PMID: 28826536 DOI: 10.1016/bs.apha.2017.04.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Of the druggable group of G protein-coupled receptors in the human genome, a number remain which have yet to be paired with an endogenous ligand-orphan GPCRs. Among these 100 or so entities, 3 have been linked to the cannabinoid system. GPR18, GPR55, and GPR119 exhibit limited sequence homology with the established CB1 and CB2 cannabinoid receptors. However, the pharmacology of these orphan receptors displays overlap with CB1 and CB2 receptors, particularly for GPR18 and GPR55. The linking of GPR119 to the cannabinoid receptors is less convincing and emanates from structural similarities of endogenous ligands active at these GPCRs, but which do not cross-react. This review describes the evidence for describing these orphan GPCRs as cannabinoid receptor-like receptors.
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Affiliation(s)
- Andrew Irving
- The Conway Institute, School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland.
| | - Ghayth Abdulrazzaq
- Life Sciences, University of Nottingham Medical School, Nottingham, United Kingdom
| | - Sue L F Chan
- Life Sciences, University of Nottingham Medical School, Nottingham, United Kingdom
| | - June Penman
- Division of Neuroscience, Ninewells Hospital and Medical School, University of Dundee, Dundee, Scotland, United Kingdom
| | - Jenni Harvey
- Division of Neuroscience, Ninewells Hospital and Medical School, University of Dundee, Dundee, Scotland, United Kingdom
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29
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Wu J, Zhu C, Yang L, Wang Z, Wang L, Wang S, Gao P, Zhang Y, Jiang Q, Zhu X, Shu G. N-Oleoylglycine-Induced Hyperphagia Is Associated with the Activation of Agouti-Related Protein (AgRP) Neuron by Cannabinoid Receptor Type 1 (CB1R). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:1051-1057. [PMID: 28102080 DOI: 10.1021/acs.jafc.6b05281] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
N-Acyl amino acids (NAAAs) are conjugate products of fatty acids and amino acids, which are available in animal-derived food. We compared the effects of N-arachidonoylglycine (NAGly), N-arachidonoylserine (NASer), and N-oleoylglycine (OLGly) on in vivo food intake and in vitro [Ca2+]i of Agouti-related protein (AgRP) neurons to identify the role of these compounds in energy homeostasis. Hypothalamic neuropeptide expression and anxiety behavior in response to OLGly were also tested. To further identify the underlying mechanism of OLGly on food intake, we first detected the expression level of potential OLGly receptors. The cannabinoid receptor type 1 (CB1R) antagonist was cotreated with OLGly to analyze the activation of AgRP neuron, including [Ca2+]i, expression levels of PKA, CREB, and c-Fos, and neuropeptide secretion. Results demonstrated that only OLGly (intrapertioneal injection of 6 mg/kg) can induce hyperphagia without changing the expression of hypothalamic neuropeptides and anxiety-like behavior. Moreover, 20 μM OLGly robustly enhances [Ca2+]i, c-Fos protein expression in AgRP neuron, and AgRP content in the culture medium. OLGly-induced activation of AgRP neuron was completely abolished by the CB1R-specific antagonist, AM251. In summary, this study is the first to demonstrate the association of OLGly-induced hyperphagia with activation of the AgRP neuron by CB1R. These findings open avenues for investigation and application of OLGly to modulate energy homeostasis.
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Affiliation(s)
- Junguo Wu
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Canjun Zhu
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Liusong Yang
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Zhonggang Wang
- Huahong Engineering and Research Center of Agricultural and Livestock , Zhaoqing, Guangdong 430051, People's Republic of China
| | - Lina Wang
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Songbo Wang
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Ping Gao
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Yongliang Zhang
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Qingyan Jiang
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Xiaotong Zhu
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
| | - Gang Shu
- College of Animal Science & National Engineering Research Center for Breeding Swine Industry, South China Agricultural University , Guangzhou 510640, People's Republic of China
- ALLTECH-SCAU Animal Nutrition Control Research Alliance, South China Agricultural University , Guangzhou 510642, People's Republic of China
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30
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Zurier RB, Burstein SH. Cannabinoids, inflammation, and fibrosis. FASEB J 2016; 30:3682-3689. [DOI: 10.1096/fj.201600646r] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 07/11/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Robert B. Zurier
- Department of Medicine and Department of Biochemistry and Molecular PharmacologyUniversity of Massachusetts Medical School Worcester Massachusetts USA
| | - Sumner H. Burstein
- Department of Medicine and Department of Biochemistry and Molecular PharmacologyUniversity of Massachusetts Medical School Worcester Massachusetts USA
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31
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Boorman E, Zajkowska Z, Ahmed R, Pariante CM, Zunszain PA. Crosstalk between endocannabinoid and immune systems: a potential dysregulation in depression? Psychopharmacology (Berl) 2016; 233:1591-604. [PMID: 26483037 PMCID: PMC4828487 DOI: 10.1007/s00213-015-4105-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 09/28/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND The endocannabinoid (eCB) system, an endogenous lipid signaling system, appears to be dysregulated in depression. The role of endocannabinoids (eCBs) as potent immunomodulators, together with the accumulating support for a chronic low-grade inflammatory profile in depression, suggests a compelling hypothesis for a fundamental impairment in their intercommunication, in depression. OBJECTIVE We aim to review previous literature on individual associations between the immune and eCB systems and depression. It will focus on peripheral and central mechanisms of crosstalk between the eCB and immune systems. A potential dysregulation in this crosstalk will be discussed in the context of depression. RESULTS Investigations largely report a hypoactivity of the eCB system and increased inflammatory markers in individuals with depression. Findings depict a multifaceted communication whereby immunocompetent and eCB-related cells can both influence the suppression and enhancement of the other's activity in both the periphery and central nervous system. A dysregulation of the eCB system, as seen in depression, appears to be associated with central and peripheral concentrations of inflammatory agents implicated in the pathophysiology of this illness. CONCLUSION The eCB and immune systems have been individually associated with and implicated in pathogenic mechanisms of depression. Both systems tightly regulate the other's activity. As such, a dysregulation in this crosstalk has potential to influence the onset and maintenance of this neuropsychiatric illness. However, few studies have investigated both systems and depression conjointly. This review highlights the demand to consider joint eCB-immune interactions in the pathoetiology of depression.
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Affiliation(s)
- Emily Boorman
- Stress, Psychiatry and Immunology Laboratory, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Zuzanna Zajkowska
- Stress, Psychiatry and Immunology Laboratory, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Rumsha Ahmed
- Stress, Psychiatry and Immunology Laboratory, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Carmine M Pariante
- Stress, Psychiatry and Immunology Laboratory, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - Patricia A Zunszain
- Stress, Psychiatry and Immunology Laboratory, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK.
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32
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Iannotti FA, Di Marzo V, Petrosino S. Endocannabinoids and endocannabinoid-related mediators: Targets, metabolism and role in neurological disorders. Prog Lipid Res 2016; 62:107-28. [DOI: 10.1016/j.plipres.2016.02.002] [Citation(s) in RCA: 235] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 01/25/2016] [Accepted: 02/26/2016] [Indexed: 12/19/2022]
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33
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Wang S, Xu Q, Shu G, Wang L, Gao P, Xi Q, Zhang Y, Jiang Q, Zhu X. N-Oleoyl glycine, a lipoamino acid, stimulates adipogenesis associated with activation of CB1 receptor and Akt signaling pathway in 3T3-L1 adipocyte. Biochem Biophys Res Commun 2015; 466:438-43. [PMID: 26365347 DOI: 10.1016/j.bbrc.2015.09.046] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 09/08/2015] [Indexed: 01/03/2023]
Abstract
Adipose tissue plays a vital role in the development of obesity and related diseases. The aim of the present study was to investigate the effects of N-Oleoyl glycine (OLGly), a lipoamino acid, on 3T3-L1 adipogenesis and to explore the likely mechanisms underlying this process. Lipid accumulation were evaluated using Oil Red O staining and triglyceride content assay. The mRNA expressions of cannabinoid receptors and the protein expressions of adipogenic genes and intracellular signaling pathway were determined by real-time quantitative PCR and western blot, respectively. The results indicated that OLGly itself, but not its degradation products, stimulated lipid accumulation and significantly increased adipogenic genes (PPARγ and aP2), in a dose- and time-dependent manner. Additionally, OLGly markedly increased the mRNA expression of CB1 receptor (CB1R) and the inhibition of CB1R by its antagonist SR141716 abolished the promotive effects of OLGly on lipid accumulation and the protein expression of PPARγ and aP2. Furthermore, OLGly increased the ratio of p-Akt/Akt and p-FoxO1/FoxO1, which could be reversed by SR141716. Moreover, OLGly-induced enhancement of adipogenesis, activation of insulin-mediated Akt signaling pathway and inactivation of FoxO1 were effectively blocked by Wortmannin, a specific PI3K/Akt inhibitor, indicating the essential role of Akt signaling pathway in the process of OLGly-stimulated 3T3-L1 adipogenesis. In conclusion, OLGly, a lipoamino acid, was able to promote 3T3-L1 adipogenesis through the activation of CB1 receptor and the enhancement of insulin-mediated Akt signaling pathway. These findings suggested the potential role of OLGly in increasing insulin sensitivity and suppressing obesity and diabetes.
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Affiliation(s)
- Songbo Wang
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Qi Xu
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Gang Shu
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Lina Wang
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Ping Gao
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Qianyun Xi
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Yongliang Zhang
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China
| | - Qingyan Jiang
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China.
| | - Xiaotong Zhu
- College of Animal Science and National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, PR China.
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Becker AM, Callahan DJ, Richner JM, Choi J, DiPersio JF, Diamond MS, Bhattacharya D. GPR18 Controls Reconstitution of Mouse Small Intestine Intraepithelial Lymphocytes following Bone Marrow Transplantation. PLoS One 2015. [PMID: 26197390 PMCID: PMC4510063 DOI: 10.1371/journal.pone.0133854] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Specific G protein coupled receptors (GPRs) regulate the proper positioning, function, and development of immune lineage subsets. Here, we demonstrate that GPR18 regulates the reconstitution of intraepithelial lymphocytes (IELs) of the small intestine following bone marrow transplantation. Through analysis of transcriptional microarray data, we find that GPR18 is highly expressed in IELs, lymphoid progenitors, and mature follicular B cells. To establish the physiological role of this largely uncharacterized GPR, we generated Gpr18-/- mice. Despite high levels of GPR18 expression in specific hematopoietic progenitors, Gpr18-/- mice have no defects in lymphopoiesis or myelopoiesis. Moreover, antibody responses following immunization with hapten-protein conjugates or infection with West Nile virus are normal in Gpr18-/- mice. Steady-state numbers of IELs are also normal in Gpr18-/- mice. However, competitive bone marrow reconstitution experiments demonstrate that GPR18 is cell-intrinsically required for the optimal restoration of small intestine TCRγδ+ and TCRαβ+ CD8αα+ IELs. In contrast, GPR18 is dispensable for the reconstitution of large intestine IELs. Moreover, Gpr18-/- bone marrow reconstitutes small intestine IELs similarly to controls in athymic recipients. Gpr18-/- chimeras show no changes in susceptibility to intestinal insults such as Citrobacter rodentium infections or graft versus host disease. These data reveal highly specific requirements for GPR18 in the development and reconstitution of thymus-derived intestinal IEL subsets in the steady-state and after bone marrow transplantation.
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MESH Headings
- Animals
- B-Lymphocytes/cytology
- Bone Marrow Cells/cytology
- Bone Marrow Transplantation
- Citrobacter
- Female
- Graft vs Host Disease
- Hematopoietic Stem Cells/cytology
- Intestinal Mucosa/metabolism
- Intestine, Small/metabolism
- Lymphocytes/cytology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Myelopoiesis
- Oligonucleotide Array Sequence Analysis
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Receptors, G-Protein-Coupled/metabolism
- Thymus Gland/metabolism
- Transplantation, Homologous
- West Nile virus
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Affiliation(s)
- Amy M. Becker
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Derrick J. Callahan
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Justin M. Richner
- Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, United States of America
- Department of Molecular Microbiology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Jaebok Choi
- Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, United States of America
- Division of Oncology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - John F. DiPersio
- Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, United States of America
- Division of Oncology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Michael S. Diamond
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
- Department of Medicine, Washington University School of Medicine, Saint Louis, Missouri, United States of America
- Department of Molecular Microbiology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
| | - Deepta Bhattacharya
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, Missouri, United States of America
- * E-mail:
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Chiang N, Dalli J, Colas RA, Serhan CN. Identification of resolvin D2 receptor mediating resolution of infections and organ protection. ACTA ACUST UNITED AC 2015. [PMID: 26195725 PMCID: PMC4516788 DOI: 10.1084/jem.20150225] [Citation(s) in RCA: 275] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chiang et al. identify GPR18 as a novel receptor for resolvin D2, and show that activation of this receptor in human and mouse phagocytes stimulates phagocytic clearance during bacterial infections and promotes organ protection Endogenous mechanisms that orchestrate resolution of acute inflammation are essential in host defense and the return to homeostasis. Resolvin (Rv)D2 is a potent immunoresolvent biosynthesized during active resolution that stereoselectively stimulates resolution of acute inflammation. Here, using an unbiased G protein–coupled receptor-β-arrestin–based screening and functional sensing systems, we identified a receptor for RvD2, namely GPR18, that is expressed on human leukocytes, including polymorphonuclear neutrophils (PMN), monocytes, and macrophages (MΦ). In human MΦ, RvD2-stimulated intracellular cyclic AMP was dependent on GPR18. RvD2-stimulated phagocytosis of Escherichia coli and apoptotic PMN (efferocytosis) were enhanced with GPR18 overexpression and significantly reduced by shRNA knockdown. Specific binding of RvD2 to recombinant GPR18 was confirmed using a synthetic 3H-labeled-RvD2. Scatchard analysis gave a Kd of ∼10 nM consistent with RvD2 bioactive concentration range. In both E. coli and Staphylococcus aureus infections, RvD2 limited PMN infiltration, enhanced phagocyte clearance of bacteria, and accelerated resolution. These actions were lost in GPR18-deficient mice. During PMN-mediated second organ injury, RvD2’s protective actions were also significantly diminished in GPR18-deficient mice. Together, these results provide evidence for a novel RvD2–GPR18 resolution axis that stimulates human and mouse phagocyte functions to control bacterial infections and promote organ protection.
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Affiliation(s)
- Nan Chiang
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Institutes of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115
| | - Jesmond Dalli
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Institutes of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115
| | - Romain A Colas
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Institutes of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115
| | - Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Harvard Institutes of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115
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Ayakannu T, Taylor AH, Willets JM, Konje JC. The evolving role of the endocannabinoid system in gynaecological cancer. Hum Reprod Update 2015; 21:517-35. [PMID: 25958409 DOI: 10.1093/humupd/dmv022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 04/09/2015] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The 'endocannabinoid system' (ECS), comprising endogenous ligands (endocannabinoids) and their regulating enzymes, together with the cannabinoid receptors, has attracted a great deal of attention because it affects not only all facets of human reproduction, from gametogenesis through to parturition and beyond, but also targets key mechanisms affecting some hallmarks of cancer. Recent evidence showing that cannabinoid receptors play a very important role in the development of malignancies outside of the reproductive organs suggests a similar role for the ECS in the establishment or continued development of gynaecological malignancy. METHODS Primary papers and review articles, and primary sources within these papers, up to December 2014, on the evolving role of the ECS in cancer, with a special focus on gynaecological cancers, were obtained by Medline and PubMed searches using the search terms: 'cancer', 'cannabinoid', 'endocannabinoid', 'gynaecology' and 'malignancy'. Non-English manuscripts were excluded. RESULTS More than 2100 sources were obtained from which only 112 were specifically important to the topic. Analysis of those articles supports a role of the ECS in gynaecological cancers but leaves many gaps in our knowledge that need to be filled. How some of the relevant receptors are activated and cause changes in cell phenotypes that progress to malignancy remains undiscovered and an area for future research. Increasing evidence suggests that malignant transformation within the female genital tract could be accompanied by deregulation of components of the ECS, acting through rather complex cannabinoid receptor-dependent and receptor-independent mechanisms. CONCLUSIONS The paucity of studies in this area suggests that research using animal models is needed to evaluate endocannabinoid signalling in cancer networks. Future randomized clinical studies should reveal whether endocannabinoids or their derivatives prove to be useful therapeutic targets for gynaecological and other cancers.
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Affiliation(s)
- Thangesweran Ayakannu
- Endocannabinoid Research Group, Reproductive Sciences Section, Department of Cancer Studies and Molecular Medicine, University of Leicester, Leicester LE2 7LX, UK
| | - Anthony H Taylor
- Endocannabinoid Research Group, Reproductive Sciences Section, Department of Cancer Studies and Molecular Medicine, University of Leicester, Leicester LE2 7LX, UK Biosciences, School of Science and Technology, Nottingham Trent University, Clifton Campus, Nottingham NG1 4BU, UK
| | - Jonathan M Willets
- Endocannabinoid Research Group, Reproductive Sciences Section, Department of Cancer Studies and Molecular Medicine, University of Leicester, Leicester LE2 7LX, UK
| | - Justin C Konje
- Endocannabinoid Research Group, Reproductive Sciences Section, Department of Cancer Studies and Molecular Medicine, University of Leicester, Leicester LE2 7LX, UK Department of Obstetrics and Gynaecology, Sidra Medical and Research Centre, Doha P.O. Box 26999, Qatar
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Burstein S. Cannabidiol (CBD) and its analogs: a review of their effects on inflammation. Bioorg Med Chem 2015; 23:1377-85. [DOI: 10.1016/j.bmc.2015.01.059] [Citation(s) in RCA: 283] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 01/23/2015] [Accepted: 01/30/2015] [Indexed: 01/13/2023]
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Bondarenko AI, Drachuk K, Panasiuk O, Sagach V, Deak AT, Malli R, Graier WF. N-Arachidonoyl glycine suppresses Na⁺/Ca²⁺ exchanger-mediated Ca²⁺ entry into endothelial cells and activates BK(Ca) channels independently of GPCRs. Br J Pharmacol 2014; 169:933-48. [PMID: 23517055 PMCID: PMC3687672 DOI: 10.1111/bph.12180] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 01/14/2013] [Accepted: 02/20/2013] [Indexed: 02/03/2023] Open
Abstract
Background and Purpose N-arachidonoyl glycine (NAGly) is a lipoamino acid with vasorelaxant properties. We aimed to explore the mechanisms of NAGly's action on unstimulated and agonist-stimulated endothelial cells. Experimental Approach The effects of NAGly on endothelial electrical signalling were studied in combination with vascular reactivity. Key Results In EA.hy926 cells, the sustained hyperpolarization to histamine was inhibited by the non-selective Na+/Ca2+ exchanger (NCX) inhibitor bepridil and by an inhibitor of reversed mode NCX, KB-R7943. In cells dialysed with Cs+-based Na+-containing solution, the outwardly rectifying current with typical characteristics of NCX was augmented following histamine exposure, further increased upon external Na+ withdrawal and inhibited by bepridil. NAGly (0.3–30 μM) suppressed NCX currents in a URB597- and guanosine 5′-O-(2-thiodiphosphate) (GDPβS)-insensitive manner, [Ca2+]i elevation evoked by Na+ removal and the hyperpolarization to histamine. In rat aorta, NAGly opposed the endothelial hyperpolarization and relaxation response to ACh. In unstimulated EA.hy926 cells, NAGly potentiated the whole-cell current attributable to large-conductance Ca2+-activated K+ (BKCa) channels in a GDPβS-insensitive, paxilline-sensitive manner and produced a sustained hyperpolarization. In cell-free inside-out patches, NAGly stimulated single BKCa channel activity. Conclusion and Implications Our data showed that NCX is a Ca2+ entry pathway in endothelial cells and that NAGly is a potent G-protein-independent modulator of endothelial electrical signalling and has a dual effect on endothelial electrical responses. In agonist pre-stimulated cells, NAGly opposes hyperpolarization and relaxation via inhibition of NCX-mediated Ca2+ entry, while in unstimulated cells, it promotes hyperpolarization via receptor-independent activation of BKCa channels.
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Affiliation(s)
- Alexander I Bondarenko
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Graz, Austria.
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39
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Burstein SH. The cannabinoid acids, analogs and endogenous counterparts. Bioorg Med Chem 2014; 22:2830-43. [PMID: 24731541 PMCID: PMC4351512 DOI: 10.1016/j.bmc.2014.03.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 03/15/2014] [Accepted: 03/24/2014] [Indexed: 12/21/2022]
Abstract
The cannabinoid acids are a structurally heterogeneous group of compounds some of which are endogenous molecules and others that are metabolites of phytocannabinoids. The prototypic endogenous substance is N-arachidonoyl glycine (NAgly) that is closely related in structure to the cannabinoid agonist anandamide. The most studied phytocannabinoid is Δ(9)-THC-11-oic acid, the principal metabolite of Δ(9)-THC. Both types of acids have in common several biological actions such as low affinity for CB1 anti-inflammatory activity and analgesic properties. This suggests that there may be similarities in their mechanism of action, a point that is discussed in this review. Also presented are reports on analogs of the acids that provide opportunities for the development of novel therapeutic agents, such as ajulemic acid.
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Affiliation(s)
- Sumner H Burstein
- Department of Biochemistry and Molecular Pharmacology, The University of Massachusetts Medical School, Worcester, MA 01605, USA.
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40
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McHugh D. GPR18 in microglia: implications for the CNS and endocannabinoid system signalling. Br J Pharmacol 2013; 167:1575-82. [PMID: 22563843 DOI: 10.1111/j.1476-5381.2012.02019.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A review of what is presently known about the G protein coupled receptor GPR18 in terms of its expression and distribution, pharmacology and potential implications for central nervous system and endocannabinoid system signalling. LINKED ARTICLES This article is part of a themed section on Cannabinoids. To view the other articles in this section visit http://dx.doi.org/10.1111/bph.2012.167.issue-8.
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Affiliation(s)
- D McHugh
- Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN 47408, USA.
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41
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Endogenous cannabinoids revisited: A biochemistry perspective. Prostaglandins Other Lipid Mediat 2013; 102-103:13-30. [DOI: 10.1016/j.prostaglandins.2013.02.002] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 02/20/2013] [Accepted: 02/21/2013] [Indexed: 12/13/2022]
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Kattamuri PV, Salmonsen R, McQuain C, Burstein S, Sun H, Li G. Asymmetric synthesis of novel N-(1-phenyl-2,3-dihydroxypropyl)arachidonylamides and evaluation of their anti-inflammatory activity. Life Sci 2013; 92:506-11. [PMID: 22820546 DOI: 10.1016/j.lfs.2012.06.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Revised: 06/25/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
Abstract
AIMS To design and synthesize novel N-(1-phenyl-2,3-dihydroxypropyl)arachidonylamides and evaluate their analgesic and anti-inflammatory potential. MAIN METHODS The murine macrophage cell line RAW 264.7 has been widely used as a model for inflammatory responses in vitro. Our model consists of cultured monolayers of RAW 264.7 cells in which media concentrations of 15-deoxy-Δ(13,14)-PGJ2 (PGJ) are measured by ELISA following LPS (10ng/ml) stimulation and treatment with 0.1, 0.3, 1.0, 3.0 and 10μM concentrations of the compounds. KEY FINDINGS Our data indicate that several of our compounds have the capacity to increase production of PGJ and may also increase the occurrence of programmed cell death (apoptosis). SIGNIFICANCE Thus these agents are potential candidates for the therapy of conditions characterized by ongoing (chronic) inflammation and its associated pain.
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Deak AT, Groschner LN, Alam MR, Seles E, Bondarenko AI, Graier WF, Malli R. The endocannabinoid N-arachidonoyl glycine (NAGly) inhibits store-operated Ca2+ entry by preventing STIM1-Orai1 interaction. J Cell Sci 2012; 126:879-88. [PMID: 23239024 DOI: 10.1242/jcs.118075] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The endocannabiniod anandamide (AEA) and its derivate N-arachidonoyl glycine (NAGly) have a broad spectrum of physiological effects, which are induced by both binding to receptors and receptor-independent modulations of ion channels and transporters. The impact of AEA and NAGly on store-operated Ca(2+) entry (SOCE), a ubiquitous Ca(2+) entry pathway regulating many cellular functions, is unknown. Here we show that NAGly, but not AEA reversibly hinders SOCE in a time- and concentration-dependent manner. The inhibitory effect of NAGly on SOCE was found in the human endothelial cell line EA.hy926, the rat pancreatic β-cell line INS-1 832/13, and the rat basophilic leukemia cell line RBL-2H3. NAGly diminished SOCE independently from the mode of Ca(2+) depletion of the endoplasmic reticulum, whereas it had no effect on Ca(2+) entry through L-type voltage-gated Ca(2+) channels. Enhanced Ca(2+) entry was effectively hampered by NAGly in cells overexpressing the key molecular constituents of SOCE, stromal interacting molecule 1 (STIM1) and the pore-forming subunit of SOCE channels, Orai1. Fluorescence microscopy revealed that NAGly did not affect STIM1 oligomerization, STIM1 clustering, or the colocalization of STIM1 with Orai1, which were induced by Ca(2+) depletion of the endoplasmic reticulum. In contrast, independently from its slow depolarizing effect on mitochondria, NAGly instantly and strongly diminished the interaction of STIM1 with Orai1, indicating that NAGly inhibits SOCE primarily by uncoupling STIM1 from Orai1. In summary, our findings revealed the STIM1-Orai1-mediated SOCE machinery as a molecular target of NAGly, which might have many implications in cell physiology.
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Affiliation(s)
- Andras T Deak
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz, Graz, Austria
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44
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Buckley CD, Gilroy DW, Serhan CN, Stockinger B, Tak PP. The resolution of inflammation. Nat Rev Immunol 2012. [PMID: 23197111 DOI: 10.1038/nri3362] [Citation(s) in RCA: 312] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In 2012, Nature Reviews Immunology organized a conference that brought together scientists and clinicians from both academia and industry to discuss one of the most pressing questions in medicine--how do we turn off rampant, undesirable inflammation? There is a growing appreciation that, similarly to the initiation of inflammation, the resolution of inflammation is an intricate and active process. Can we therefore harness the mediators involved in resolution responses to treat patients with chronic inflammatory or autoimmune diseases? Here, we ask five of the speakers from the conference to share their thoughts on this emerging field.
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Affiliation(s)
- Christopher D Buckley
- Rheumatology Research Group at the Centre for Translational Inflammation Research, School of Immunity and Infection, College of Medical and Dental Sciences, University of Birmingham Research Laboratories, Queen Elizabeth Hospital, Birmingham, B15 2WD, UK.
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Lu VB, Puhl HL, Ikeda SR. N-Arachidonyl glycine does not activate G protein-coupled receptor 18 signaling via canonical pathways. Mol Pharmacol 2012; 83:267-82. [PMID: 23104136 DOI: 10.1124/mol.112.081182] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Recent studies propose that N-arachidonyl glycine (NAGly), a carboxylic analogue of anandamide, is an endogenous ligand of the Gα(i/o) protein-coupled receptor 18 (GPR18). However, a high-throughput β-arrestin-based screen failed to detect activation of GPR18 by NAGly (Yin et al., 2009; JBC, 18:12328). To address this inconsistency, this study investigated GPR18 coupling in a native neuronal system with endogenous signaling pathways and effectors. GPR18 was heterologously expressed in rat sympathetic neurons, and the modulation of N-type (Ca(v)2.2) calcium channels was examined. Proper expression and trafficking of receptor were confirmed by the "rim-like" fluorescence of fluorescently tagged receptor and the positive staining of external hemagglutinin-tagged GPR18-expressing cells. Application of NAGly on GPR18-expressing neurons did not inhibit calcium currents but instead potentiated currents in a voltage-dependent manner, similar to what has previously been reported (Guo et al., 2008; J Neurophysiol, 100:1147). Other proposed agonists of GPR18, including anandamide and abnormal cannabidiol, also failed to induce inhibition of calcium currents. Mutants of GPR18, designed to constitutively activate receptors, did not tonically inhibit calcium currents, indicating a lack of GPR18 activation or coupling to endogenous G proteins. Other downstream effectors of Gα(i/o)-coupled receptors, G protein-coupled inwardly rectifying potassium channels and adenylate cyclase, were not modulated by GPR18 signaling. Furthermore, GPR18 did not couple to other G proteins tested: Gα(s), Gα(z), and Gα(15). These results suggest NAGly is not an agonist for GPR18 or that GPR18 signaling involves noncanonical pathways not examined in these studies.
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Affiliation(s)
- Van B Lu
- Laboratory of Molecular Physiology, National Institutes of Health/National Institute on Alcohol Abuse and Alcoholism, 5625 Fishers Lane, Room TS-11, MSC 9411, Bethesda, MD 20892, USA.
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Hung ND, Sok DE, Kim MR. Prevention of 1-palmitoyl lysophosphatidylcholine-induced inflammation by polyunsaturated acyl lysophosphatidylcholine. Inflamm Res 2012; 61:473-83. [PMID: 22252240 DOI: 10.1007/s00011-012-0434-x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 12/29/2011] [Accepted: 12/30/2011] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE The aim of this study was to examine the inflammation induced by saturated acyl lysophosphatidylcholine (LPC) in vivo and to investigate whether it could be attenuated by the action of polyunsaturated acyl lysophosphatidylcholines (LPCs), which are known as anti-inflammatory lipid mediators. METHODS First, saturated acyl LPC was administered intraperitoneally (i.p.) to mice and the inflammatory profile was extensively characterized. Subsequently, the preventive effect of polyunsaturated acyl LPCs, i.p. administered 30 min after saturated acyl LPC, was evaluated by measuring indices of inflammation such as leukocyte migration, plasma leakage, and eicosanoid or cytokine formation by light microscopy, Evans blue dye as indicator, and enzyme-linked immunosorbent assay, respectively. RESULTS Saturated acyl LPCs as LPC16:0 (100 mg/kg, i.p.) proved to be an effective inflammation inducer which causes a significant increase in plasma leakage, leukocyte migration into peritoneum and elevation of pro-inflammatory mediators. Interestingly, LPC20:4 and LPC22:6 (50 and 150 μg/kg) significantly nullified LPC16:0-induced inflammation. The anti-inflammatory effects of LPC20:4 and LPC22:6 were related to down-regulation of leukocyte extravasation, plasma leakage, and formation of pro-inflammatory mediators (IL-5, IL-6, NO, 12-HETE and PGE(2)) stimulated by LPC16:0, and up-regulation of anti-inflammatory mediators (IL-4 and IL-10). CONCLUSION These results indicated that the pro-inflammatory activity of saturated acyl LPCs could be antagonized by the actions of polyunsaturated acyl LPCs, anti-inflammatory lipid mediators.
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Affiliation(s)
- Nguyen Dang Hung
- College of Pharmacy, Chungnam National University, Yuseong-Gu, Gungdong, Daejeon, Korea.
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Burstein S, McQuain C, Salmonsen R, Seicol B. N-Amino acid linoleoyl conjugates: anti-inflammatory activities. Bioorg Med Chem Lett 2012; 22:872-5. [PMID: 22217875 PMCID: PMC3258367 DOI: 10.1016/j.bmcl.2011.12.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 12/06/2011] [Accepted: 12/08/2011] [Indexed: 12/22/2022]
Abstract
Several N-linked amino acid-linoleic acid conjugates were studied for their potential as anti inflammatory agents. The parent molecule, N-linoleoylglycine was tested in an in vivo model, the mouse peritonitis assay where it showed activity in reducing leukocyte migration at doses as low as 0.3mg/kg when administered by mouth in safflower oil. Harvested peritoneal cells produced elevated levels of the inflammation-resolving eicosanoid 15-deoxy-Δ(13,14)-PGJ(2). These results are similar to those obtained in earlier studies with N-arachidonoylglycine. An in vitro model using mouse macrophage RAW cells was used to evaluate a small group of structural analogs for their ability to stimulate 15-deoxy-Δ(13,14)-PGJ(2) production. The d-alanine derivative was the most active while the d-phenylalanine showed almost no response. A high degree of stereo specificity was observed comparing the d and l alanine isomers; the latter being the less active. It was concluded that linoleic acid conjugates could provide suitable templates in a drug discovery program leading to novel agents for promoting the resolution of chronic inflammation.
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Affiliation(s)
- Sumner Burstein
- Department of Biochemistry and Molecular Pharmacology, The University of Massachusetts Medical School, 364 Plantation St., Worcester, MA 01605, USA.
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Takenouchi R, Inoue K, Kambe Y, Miyata A. N-arachidonoyl glycine induces macrophage apoptosis via GPR18. Biochem Biophys Res Commun 2012; 418:366-71. [PMID: 22266325 DOI: 10.1016/j.bbrc.2012.01.027] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 01/06/2012] [Indexed: 01/11/2023]
Abstract
N-arachidonoyl glycine (NAGly), a member of lipoamino acids, was reported to exhibit anti-inflammatory effects in experimental ear edema or peritonitis. However the underlying mechanisms have not been clarified so far. In this study, we attempt to investigate the effects of NAGly on macrophages, including the relevant signaling pathways. NAGly potently induced apoptosis in mouse macrophage-derived cell line, RAW264.7. Pretreatment with inhibitors for MEK and p38 MAPK prevented the apoptosis induced by NAGly, although NAGly activated ERK1/2, p38 MAPK and JNK. Further, we focused on implication of GPR18, one of the orphan G protein-coupled receptors, because NAGly has been reported as a candidate ligand for GPR18. Pretreatment with pertussis toxin or siRNA to knock down the expression of GPR18 significantly attenuated the apoptosis induced by NAGly. In mouse peritoneal macrophages, the expression of GPR18 mRNA was elevated in proinflammatory stimulated macrophages but not in anti-inflammatory stimulated macrophages; consistently, NAGly remarkably reduced cell viability of the former, as compared to the latter. These results suggest that NAGly might be involved in function of macrophages through GPR18.
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Affiliation(s)
- Rina Takenouchi
- Department of Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima-shi, Kagoshima 890-8544, Japan
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