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Al Abadey A, Connor B, Flamme ACL, Robichon K. Clozapine reduces chemokine-mediated migration of lymphocytes by targeting NF-κB and AKT phosphorylation. Cell Signal 2022; 99:110449. [PMID: 36031090 DOI: 10.1016/j.cellsig.2022.110449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/11/2022] [Accepted: 08/22/2022] [Indexed: 11/27/2022]
Abstract
Multiple sclerosis is a disease characterised by demyelination of axons in the central nervous system. The atypical antipsychotic drug clozapine has been shown to attenuate disease severity in experimental autoimmune encephalomyelitis (EAE), a mouse model that is useful for the study of multiple sclerosis. However, the mechanism of action by which clozapine reduces disease in EAE is poorly understood. To better understand how clozapine exerts its protective effects, we investigated the underlying signalling pathways by which clozapine may reduce immune cell migration by evaluating chemokine and dopamine receptor-associated signalling pathways. We found that clozapine inhibits migration of immune cells by reducing chemokine production in microglia cells by targeting NF-κB phosphorylation and promoting an anti-inflammatory milieu. Furthermore, clozapine directly targets immune cell migration by changing Ca2+ levels within immune cells and reduces the phosphorylation of signalling protein AKT. Linking these pathways to the antagonising effect of clozapine on dopamine and serotonin receptors, we provide insight into how clozapine alters immune cells migration by directly targeting the underlying migration-associated pathways.
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Affiliation(s)
- Afnan Al Abadey
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Centre for Biodiscovery Wellington, Victoria University of Wellington, Wellington, New Zealand
| | - Bronwen Connor
- Department of Pharmacology and Clinical Pharmacology, Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Anne Camille La Flamme
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Centre for Biodiscovery Wellington, Victoria University of Wellington, Wellington, New Zealand; Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Katharina Robichon
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Centre for Biodiscovery Wellington, Victoria University of Wellington, Wellington, New Zealand.
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2
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Huang Z, Gao N, Zhang S, Xing J, Hou J. Investigating the toxically homogenous effects of three lanthanides on zebrafish. Comp Biochem Physiol C Toxicol Pharmacol 2022; 253:109251. [PMID: 34861418 DOI: 10.1016/j.cbpc.2021.109251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/29/2021] [Accepted: 11/18/2021] [Indexed: 02/07/2023]
Abstract
The adverse effects of rare earth elements (REEs) have been increasingly reported in the past decades and have raised concern about their environmental toxicities. However, the available data is insufficient to elucidate the toxic effects, mechanisms, and whether the toxicity across all REEs is uniform. In this study, zebrafish were exposed to 0, 0.8, 1.6, 3.2, 6.4, 12.8 and 25.6 mg/L Ln(NO3)3•6H2O to test the acute toxicity of La(III), Ce(III), and Nd(III). LC50 of the three lanthanides was compared to the extent of the impact on gene expression. We carried out the functionally grouped network-based transcriptome analysis using gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) to explore the molecular mechanisms. The acute toxicity test showed that LC50 of La(III), Ce(III), and Nd(III) were 2.53, 2.03, and 2.76 mg/L, respectively. Consistent with acute toxicity, Ce(III) caused a little more DEGs than La(III) and Nd(III). Some biological processes such as metabolism of xenobiotics, oocyte meiosis, steroid biosynthesis, DNA replication, and p53 signaling pathway were affected following exposure of all the three lanthanides. Ce(III) also induced changes in the chemokine-mediated signaling pathway. The results indicated that the lethality is comparable, and the toxic patterns are similar across the three lanthanides. This study gives comparative research on the toxicities of three lanthanides to model organism zebrafish.
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Affiliation(s)
- Zhihui Huang
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Ning Gao
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Siyi Zhang
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Jianing Xing
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Jing Hou
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
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3
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Nickoloff-Bybel EA, Festa L, Meucci O, Gaskill PJ. Co-receptor signaling in the pathogenesis of neuroHIV. Retrovirology 2021; 18:24. [PMID: 34429135 PMCID: PMC8385912 DOI: 10.1186/s12977-021-00569-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 08/11/2021] [Indexed: 12/13/2022] Open
Abstract
The HIV co-receptors, CCR5 and CXCR4, are necessary for HIV entry into target cells, interacting with the HIV envelope protein, gp120, to initiate several signaling cascades thought to be important to the entry process. Co-receptor signaling may also promote the development of neuroHIV by contributing to both persistent neuroinflammation and indirect neurotoxicity. But despite the critical importance of CXCR4 and CCR5 signaling to HIV pathogenesis, there is only one therapeutic (the CCR5 inhibitor Maraviroc) that targets these receptors. Moreover, our understanding of co-receptor signaling in the specific context of neuroHIV is relatively poor. Research into co-receptor signaling has largely stalled in the past decade, possibly owing to the complexity of the signaling cascades and functions mediated by these receptors. Examining the many signaling pathways triggered by co-receptor activation has been challenging due to the lack of specific molecular tools targeting many of the proteins involved in these pathways and the wide array of model systems used across these experiments. Studies examining the impact of co-receptor signaling on HIV neuropathogenesis often show activation of multiple overlapping pathways by similar stimuli, leading to contradictory data on the effects of co-receptor activation. To address this, we will broadly review HIV infection and neuropathogenesis, examine different co-receptor mediated signaling pathways and functions, then discuss the HIV mediated signaling and the differences between activation induced by HIV and cognate ligands. We will assess the specific effects of co-receptor activation on neuropathogenesis, focusing on neuroinflammation. We will also explore how the use of substances of abuse, which are highly prevalent in people living with HIV, can exacerbate the neuropathogenic effects of co-receptor signaling. Finally, we will discuss the current state of therapeutics targeting co-receptors, highlighting challenges the field has faced and areas in which research into co-receptor signaling would yield the most therapeutic benefit in the context of HIV infection. This discussion will provide a comprehensive overview of what is known and what remains to be explored in regard to co-receptor signaling and HIV infection, and will emphasize the potential value of HIV co-receptors as a target for future therapeutic development. ![]()
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Affiliation(s)
- E A Nickoloff-Bybel
- Department of Pharmacology and Physiology, Drexel University College of Medicine, 245 N. 15th Street, Philadelphia, PA, 19102, USA
| | - L Festa
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, 240 S. 40th Street, Philadelphia, PA, 19104, USA
| | - O Meucci
- Department of Pharmacology and Physiology, Drexel University College of Medicine, 245 N. 15th Street, Philadelphia, PA, 19102, USA.,Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, 19102, USA
| | - P J Gaskill
- Department of Pharmacology and Physiology, Drexel University College of Medicine, 245 N. 15th Street, Philadelphia, PA, 19102, USA.
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Lucy D, Purvis GSD, Zeboudj L, Chatzopoulou M, Recio C, Bataille CJR, Wynne GM, Greaves DR, Russell AJ. A Biased Agonist at Immunometabolic Receptor GPR84 Causes Distinct Functional Effects in Macrophages. ACS Chem Biol 2019; 14:2055-2064. [PMID: 31465201 DOI: 10.1021/acschembio.9b00533] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
GPR84 is an orphan G-protein-coupled receptor that is expressed on immune cells and implicated in several inflammatory diseases. The validation of GPR84 as a therapeutic target is hindered by the narrow range of available chemical tools and consequent poor understanding of GPR84 pathophysiology. Here we describe the discovery and characterization of DL-175, a potent, selective, and structurally novel GPR84 agonist and the first to display significantly biased signaling across GPR84-overexpressing cells, primary murine macrophages, and human U937 cells. By comparing DL-175 with reported GPR84 ligands, we show for the first time that biased GPR84 agonists have markedly different abilities to induce chemotaxis in human myeloid cells, while causing similar levels of phagocytosis enhancement. This work demonstrates that biased agonism at GPR84 enables the selective activation of functional responses in immune cells and delivers a high-quality chemical probe for further investigation.
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Affiliation(s)
- Daniel Lucy
- Department of Chemistry, University of Oxford, Mansfield Road Oxford OX1 3TA, U.K
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | - Gareth S. D. Purvis
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | - Lynda Zeboudj
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | - Maria Chatzopoulou
- Department of Chemistry, University of Oxford, Mansfield Road Oxford OX1 3TA, U.K
| | - Carlota Recio
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | | | - Graham M. Wynne
- Department of Chemistry, University of Oxford, Mansfield Road Oxford OX1 3TA, U.K
| | - David R. Greaves
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | - Angela J. Russell
- Department of Chemistry, University of Oxford, Mansfield Road Oxford OX1 3TA, U.K
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, U.K
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5
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Tay B, Stewart TA, Davis FM, Deuis JR, Vetter I. Development of a high-throughput fluorescent no-wash sodium influx assay. PLoS One 2019; 14:e0213751. [PMID: 30856233 PMCID: PMC6411159 DOI: 10.1371/journal.pone.0213751] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 02/27/2019] [Indexed: 12/15/2022] Open
Abstract
Voltage-gated sodium channels (NaVs) are key therapeutic targets for pain, epilepsy and cardiac arrhythmias. Here we describe the development of a no-wash fluorescent sodium influx assay suitable for high-throughput screening and characterization of novel drug leads. Addition of red-violet food dyes (peak absorbance range 495–575 nm) to assays in HEK293 cells heterologously expressing hNaV1.1–1.8 effectively quenched background fluorescence of the sodium indicator dye Asante NaTRIUM Green-2 (ANG-2; peak emission 540 nm), negating the need for a wash step. Ponceau 4R (1 mM) was identified as a suitable quencher, which had no direct effect on NaV channels as assessed by patch-clamp experiments, and did not alter the pharmacology of the NaV1.1–1.7 activator veratridine (EC50 10–29 μM) or the NaV1.1–1.8 inhibitor tetracaine (IC50’s 6–66 μM). In addition, we also identified that the food dyes Ponceau 4R, Brilliant Black BN, Allura Red and Amaranth are effective at quenching the background fluorescence of the calcium indicator dyes fluo-4, fura-2 and fura-5F, identifying them as potential inexpensive alternatives to no-wash calcium ion indicator kits. In summary, we have developed a no-wash fluorescent sodium influx assay suitable for high-throughput screening based on the sodium indicator dye ANG-2 and the quencher Ponceau 4R.
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Affiliation(s)
- Bryan Tay
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Teneale A. Stewart
- Mater Research Institute—The University of Queensland, Faculty of medicine, The University of Queensland, Woolloongabba, QLD, Australia
- Translational Research Institute, Woolloongabba, QLD, Australia
| | - Felicity M. Davis
- Mater Research Institute—The University of Queensland, Faculty of medicine, The University of Queensland, Woolloongabba, QLD, Australia
- Translational Research Institute, Woolloongabba, QLD, Australia
| | - Jennifer R. Deuis
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
- * E-mail: (IV); (JD)
| | - Irina Vetter
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
- School of Pharmacy, The University of Queensland, Brisbane, QLD, Australia
- * E-mail: (IV); (JD)
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6
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Lorenzen E, Ceraudo E, Berchiche YA, Rico CA, Fürstenberg A, Sakmar TP, Huber T. G protein subtype-specific signaling bias in a series of CCR5 chemokine analogs. Sci Signal 2018; 11:11/552/eaao6152. [PMID: 30327411 DOI: 10.1126/scisignal.aao6152] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Chemokines and some chemical analogs of chemokines prevent cellular HIV-1 entry when bound to the HIV-1 coreceptors C-C chemokine receptor 5 (CCR5) or C-X-C chemokine receptor 4 (CXCR4), which are G protein-coupled receptors (GPCRs). The ideal HIV-1 entry blocker targeting the coreceptors would display ligand bias and avoid activating G protein-mediated pathways that lead to inflammation. We compared CCR5-dependent activation of second messenger pathways in a single cell line. We studied two endogenous chemokines [RANTES (also known as CCL5) and MIP-1α (also known as CCL3)] and four chemokine analogs of RANTES (5P12-, 5P14-, 6P4-, and PSC-RANTES). We found that CCR5 signaled through both Gi/o and Gq/11 IP1 accumulation and Ca2+ flux arose from Gq/11 activation, rather than from Gβγ subunit release after Gi/o activation as had been previously proposed. The 6P4- and PSC-RANTES analogs were superagonists for Gq/11 activation, whereas the 5P12- and 5P14-RANTES analogs displayed a signaling bias for Gi/o These results demonstrate that RANTES analogs elicit G protein subtype-specific signaling bias and can cause CCR5 to couple preferentially to Gq/11 rather than to Gi/o signaling pathways. We propose that G protein subtype-specific signaling bias may be a general feature of GPCRs that can couple to more than one G protein family.
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Affiliation(s)
- Emily Lorenzen
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA
| | - Emilie Ceraudo
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA
| | - Yamina A Berchiche
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA
| | - Carlos A Rico
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA
| | - Alexandre Fürstenberg
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA.,Department of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Thomas P Sakmar
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA. .,Department of Neurobiology, Care Sciences and Society, Division for Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, 141 57 Huddinge, Sweden
| | - Thomas Huber
- Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, 1230 York Ave., New York, NY 10065, USA.
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Brox R, Milanos L, Saleh N, Baumeister P, Buschauer A, Hofmann D, Heinrich MR, Clark T, Tschammer N. Molecular Mechanisms of Biased and Probe-Dependent Signaling at CXC-Motif Chemokine Receptor CXCR3 Induced by Negative Allosteric Modulators. Mol Pharmacol 2018; 93:309-322. [PMID: 29343553 DOI: 10.1124/mol.117.110296] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 01/12/2018] [Indexed: 12/21/2022] Open
Abstract
Our recent explorations of allosteric modulators with improved properties resulted in the identification of two biased negative allosteric modulators, BD103 (N-1-{[3-(4-ethoxyphenyl)-4-oxo-3,4-dihydropyrido[2,3-d]pyrimi-din2yl]ethyl}-4-(4-fluorobutoxy)-N-[(1-methylpiperidin-4-yl)methyl}]butanamide) and BD064 (5-[(N-{1-[3-(4-ethoxyphenyl)-4-oxo-3,4-dihydropyrido[2,3-d]pyrimidin-2-yl]ethyl-2-[4-fluoro-3-(trifluoromethyl)phenyl]acetamido)methyl]-2-fluorophenyl}boronic acid), that exhibited probe-dependent inhibition of CXC-motif chemokine receptor CXCR3 signaling. With the intention to elucidate the structural mechanisms underlying their selectivity and probe dependence, we used site-directed mutagenesis combined with homology modeling and docking to identify amino acids of CXCR3 that contribute to modulator binding, signaling, and transmission of cooperativity. With the use of allosteric radioligand RAMX3 ([3H]N-{1-[3-(4-ethoxyphenyl)-4-oxo-3,4-dihydropyrido[2,3-d]pyrimidin-2-yl]ethyl}-2-[4-fluoro-3-(trifluoromethyl)phenyl]-N-[(1-methylpiperidin-4-yl)methyl]acetamide), we identified that F1313.32 and Y3087.43 contribute specifically to the binding pocket of BD064, whereas D1864.60 solely participates in the stabilization of binding conformation of BD103. The influence of mutations on the ability of negative allosteric modulators to inhibit chemokine-mediated activation (CXCL11 and CXCL10) was assessed with the bioluminescence resonance energy transfer-based cAMP and β-arrestin recruitment assay. Obtained data revealed complex molecular mechanisms governing biased and probe-dependent signaling at CXCR3. In particular, F1313.32, S3047.39, and Y3087.43 emerged as key residues for the compounds to modulate the chemokine response. Notably, D1864.60, W2686.48, and S3047.39 turned out to play a role in signal pathway selectivity of CXCL10, as mutations of these residues led to a G protein-active but β-arrestin-inactive conformation. These diverse effects of mutations suggest the existence of ligand- and pathway-specific receptor conformations and give new insights in the sophisticated signaling machinery between allosteric ligands, chemokines, and their receptors, which can provide a powerful platform for the development of new allosteric drugs with improved pharmacological properties.
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Affiliation(s)
- Regine Brox
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Lampros Milanos
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Noureldin Saleh
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Paul Baumeister
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Armin Buschauer
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Dagmar Hofmann
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Markus R Heinrich
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Timothy Clark
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
| | - Nuska Tschammer
- Department of Chemistry and Pharmacy, Medicinal Chemistry, Emil Fischer Center (R.B., D.H., M.R.H., N.T.) and Computer Chemistry Center (L.M., N.S., T.C.), Friedrich Alexander University, Erlangen, Germany; and Institute of Pharmacy, University of Regensburg, Regensburg, Germany (P.B., A.B.)
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8
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Effects of CCR5 59029G/A polymorphism on the risk to diabetic nephropathy. Oncotarget 2017; 8:106926-106934. [PMID: 29291000 PMCID: PMC5739785 DOI: 10.18632/oncotarget.22148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 06/13/2017] [Indexed: 11/25/2022] Open
Abstract
Background Diabetic nephropathy (DN) causes high mortality in patients with diabetes mellitus and imposes heavy burden on individuals and society. In previous studies, various researches have investigated the association of DN with CCR5 59029G/A polymorphism, but relevant findings were controversial. Therefore, we performed this meta-analysis to obtain a conclusion on this issue. Results CCR5 59029G/A polymorphism showed significant risk-increasing effects on DN in all analyses under AA vs. GG, AA+GA vs. GG, AA vs. GG+GA, A vs. G and GA vs. GG model contrasts. Besides, a similar result was also obtained in Asian and type 2 diabetes mellitus groups under these five contrasts after subgroup analyses. Methods The relevant publications were searched from the electronic databases and other sources. The association intensity between CCR5 59029G/A polymorphism and DN susceptibility was measured using pooled odds ratios (ORs) with corresponding 95% confidence intervals (95% CIs). Inter-study heterogeneity was inspected with Q test, and sensitivity analysis was conducted to verify the stability of the final outcomes by removing one study each time in turn. Begg's funnel plot and Egger's test were utilized to examine publication bias among selected studies. Conclusion CCR5 59029G/A polymorphism is significantly related to enhanced susceptibility to DN, especially in Asian populations and people with type 2 diabetes mellitus.
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9
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Anderson CA, Solari R, Pease JE. Biased agonism at chemokine receptors: obstacles or opportunities for drug discovery? J Leukoc Biol 2015; 99:901-9. [PMID: 26701135 DOI: 10.1189/jlb.2mr0815-392r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 12/01/2015] [Indexed: 01/14/2023] Open
Abstract
Chemokine receptors are typically promiscuous, binding more than one ligand, with the ligands themselves often expressed in different spatial localizations by multiple cell types. This is normally a tightly regulated process; however, in a variety of inflammatory disorders, dysregulation results in the excessive or inappropriate expression of chemokines that drives disease progression. Biased agonism, the phenomenon whereby different ligands of the same receptor are able to preferentially activate one signaling pathway over another, adds another level of complexity to an already complex system. In this minireview, we discuss the concept of biased agonism within the chemokine family and report that targeting single signaling axes downstream of chemokine receptors is not only achievable, but may well present novel opportunities to target chemokine receptors, allowing the fine tuning of receptor responses in the context of allergic inflammation and beyond.
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Affiliation(s)
- Caroline A Anderson
- Receptor Biology Group, Inflammation, Resolution and Development Section, National Heart and Lung Institute, Imperial College London, South Kensington Campus, London, United Kingdom; and
| | - Roberto Solari
- Airway Disease Infection Section, National Heart and Lung Institute, Imperial College London, Norfolk Place, London, United Kingdom
| | - James E Pease
- Receptor Biology Group, Inflammation, Resolution and Development Section, National Heart and Lung Institute, Imperial College London, South Kensington Campus, London, United Kingdom; and
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10
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Zhao L, Wang Y, Xue Y, Lv W, Zhang Y, He S. Critical roles of chemokine receptor CCR5 in regulating glioblastoma proliferation and invasion. Acta Biochim Biophys Sin (Shanghai) 2015; 47:890-8. [PMID: 26390883 DOI: 10.1093/abbs/gmv095] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 07/06/2015] [Indexed: 02/07/2023] Open
Abstract
Glioblastoma (GBM) is the most prevalent malignant primary brain tumor in adults and exhibits a spectrum of aberrantly aggressive phenotype. Tumor cell proliferation and invasion are critically regulated by chemokines and their receptors. Recent studies have shown that the chemokine CCL5 and its receptor CCR5 play important roles in tumor invasion and metastasis. Nonetheless, the roles of the CCR5 in GBM still remain unclear. The present study provides the evidence that the chemokine receptor CCR5 is highly expressed and associated with poor prognosis in human GBM. Mechanistically, CCL5-CCR5 mediates activation of Akt, and subsequently induces proliferation and invasive responses in U87 and U251 cells. Moreover, down-regulation of CCR5 significantly inhibited the growth of glioma in U87 tumor xenograft mouse model. Finally, high CCR5 expression in GBM is correlated with increased p-Akt expression in patient samples. Together, these findings suggest that the CCR5 is a critical molecular event associated with gliomagenesis.
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Affiliation(s)
- Lanfu Zhao
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
| | - Yuan Wang
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
| | - Yafei Xue
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
| | - Wenhai Lv
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
| | - Yufu Zhang
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
| | - Shiming He
- Department of Neurosurgery, Tangdu Hospital, The Fourth Military Medical University, Xi'an 710038, China
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11
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Bias in chemokine receptor signalling. Trends Immunol 2014; 35:243-52. [PMID: 24679437 DOI: 10.1016/j.it.2014.02.004] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 02/12/2014] [Accepted: 02/14/2014] [Indexed: 01/14/2023]
Abstract
Chemokine receptors are widely expressed on a variety of immune cells and play a crucial role in normal physiology as well as in inflammatory and infectious diseases. The existence of 23 chemokine receptors and 48 chemokine ligands guarantees a tight control and fine-tuning of the immune system. Here, we discuss the multiple regulatory mechanisms of chemokine signalling at a systemic, cellular, and molecular level. In particular, we focus on the impact of biased signalling at the receptor level; an emerging concept in molecular pharmacology. An improved understanding of these mechanisms may provide a framework for more effective drug discovery and development at a target class that is so relevant for immune function.
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Flanagan CA. Receptor Conformation and Constitutive Activity in CCR5 Chemokine Receptor Function and HIV Infection. ADVANCES IN PHARMACOLOGY 2014; 70:215-63. [DOI: 10.1016/b978-0-12-417197-8.00008-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Scholten DJ, Canals M, Maussang D, Roumen L, Smit MJ, Wijtmans M, de Graaf C, Vischer HF, Leurs R. Pharmacological modulation of chemokine receptor function. Br J Pharmacol 2012; 165:1617-1643. [PMID: 21699506 DOI: 10.1111/j.1476-5381.2011.01551.x] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
G protein-coupled chemokine receptors and their peptidergic ligands are interesting therapeutic targets due to their involvement in various immune-related diseases, including rheumatoid arthritis, multiple sclerosis, inflammatory bowel disease, chronic obstructive pulmonary disease, HIV-1 infection and cancer. To tackle these diseases, a lot of effort has been focused on discovery and development of small-molecule chemokine receptor antagonists. This has been rewarded by the market approval of two novel chemokine receptor inhibitors, AMD3100 (CXCR4) and Maraviroc (CCR5) for stem cell mobilization and treatment of HIV-1 infection respectively. The recent GPCR crystal structures together with mutagenesis and pharmacological studies have aided in understanding how small-molecule ligands interact with chemokine receptors. Many of these ligands display behaviour deviating from simple competition and do not interact with the chemokine binding site, providing evidence for an allosteric mode of action. This review aims to give an overview of the evidence supporting modulation of this intriguing receptor family by a range of ligands, including small molecules, peptides and antibodies. Moreover, the computer-assisted modelling of chemokine receptor-ligand interactions is discussed in view of GPCR crystal structures. Finally, the implications of concepts such as functional selectivity and chemokine receptor dimerization are considered.
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Affiliation(s)
- D J Scholten
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - M Canals
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - D Maussang
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - L Roumen
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - M J Smit
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - M Wijtmans
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - C de Graaf
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - H F Vischer
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - R Leurs
- Leiden/Amsterdam Center for Drug Research, Division of Medicinal Chemistry, Faculty of Science, VU University Amsterdam, Amsterdam, the Netherlands
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Gilbert DC, Chandler I, Summersgill B, McIntyre A, Missiaglia E, Goddard NC, Huddart RA, Shipley J. Genomic gain and over expression of CCL2 correlate with vascular invasion in stage I non-seminomatous testicular germ-cell tumours. ACTA ACUST UNITED AC 2011; 34:e114-21; discussion e121. [DOI: 10.1111/j.1365-2605.2011.01161.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Kast RE. Glioblastoma: synergy of growth promotion between CCL5 and NK-1R can be thwarted by blocking CCL5 with miraviroc, an FDA approved anti-HIV drug and blocking NK-1R with aprepitant, an FDA approved anti-nausea drug. J Clin Pharm Ther 2011; 35:657-63. [PMID: 21054456 DOI: 10.1111/j.1365-2710.2009.01148.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
WHAT IS KNOWN AND BACKGROUND Two receptor signaling pathways that are commonly active in facilitating glioblastoma growth and invasion- that of CCR5 and neurokinin (NK)-1R- have small molecule inhibitors that are FDA approved and marketed to treat other conditions. The anti-HIV drug, maraviroc, inhibits human CCR5's ligand from binding, and hence blocks CCR5 stimulation. The anti-nausea drug aprepitant blocks substance P signaling at NK-1R. AIMS AND OBJECTIVE We propose on the basis of molecular insights that a combination of the two drugs is likely to be useful in the treatment of glioblastoma. COMMENT After stimulation by their respective ligands both CCR5 and NK-1R, through intermediaries, phosphorylate and thereby activate ERK1/2, triggering in turn migratory and mitotic events. Neurokinin-1R second messenger signaling also happens to serine phosphorylate CCR5. Phosphorylated CCR5 exhibits amplified activity after agonist ligation. Therefore, aprepitant and maraviroc combined treatment is expected to exert synergestic inhibition of growth enhancing signaling in glioblastoma. Inhibiting an amplifier is equivalent to amplifying an inhibitor. Since the two suggested drugs are non-cytotoxic they are envisioned as adjunctive treatments to current standard temozolomide, radiation, and bevacizumab, all to be used after debulking primary resection. WHAT IS NEW AND CONCLUSION Our analysis makes the case for a well-designed trial of the proposed combination in the treatment of glioblastoma.
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Affiliation(s)
- R E Kast
- Department of Psychiatry, University of Vermont, Burlington, VT 05401, USA.
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Langmead CJ. Determining allosteric modulator mechanism of action: integration of radioligand binding and functional assay data. Methods Mol Biol 2011; 746:195-209. [PMID: 21607858 DOI: 10.1007/978-1-61779-126-0_10] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
The drive to produce safer and more receptor subtype selective drugs has sparked a renewed interest in allosteric modulators of G protein-coupled receptors. The increasing use of functional assays has shown that allosteric ligands are capable of modulating both orthosteric agonist affinity and efficacy, as well as mediating receptor activation in their own right. Such a complex range of behaviours can be difficult to discern from single datasets; this chapter seeks to explain how to use radioligand binding and functional assay datasets in concert to elucidate allosteric modulator mechanism of action.
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Berchiche YA, Gravel S, Pelletier ME, St-Onge G, Heveker N. Different effects of the different natural CC chemokine receptor 2b ligands on beta-arrestin recruitment, Gαi signaling, and receptor internalization. Mol Pharmacol 2010; 79:488-98. [PMID: 21088225 DOI: 10.1124/mol.110.068486] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The chemokine receptor CCR2, which has been implicated in a variety of inflammatory, autoimmune, and cardiovascular conditions, binds several natural chemokine ligands. Here, we assessed the recruitment of β-arrestin to CCR2 in response to these ligands using bioluminescence resonance energy transfer technology. Compared with CCL2, which was considered as a full agonist, other CCR2 ligands were partial agonists with reduced efficacy and potency. Agonist potencies were not a function of their affinity for CCR2. Efficacy of arrestin recruitment matched that of agonist-induced CCR2 internalization. Although the potency and efficacy rank orders of the ligands in arrestin recruitment were similar to those observed for Gα(i1) activation, arrestin recruitment was at least in part resistant to Gα(i/o)-inactivating pertussis toxin, suggesting partial independence from Gα(i/o). The degree of pertussis toxin resistance of arrestin recruitment was different between the chemokines. Moreover, qualitative differences between the arrestin responses to the different ligands were identified in the stability of the response: although CCL7-induced arrestin recruitment had a half-life of less than 15 min, CCL8 and CCL13 induced stable CCR2-arrestin interactions. Finally, the ligands stabilized different conformations of the CCR2 homodimer. Our results support the validity of models for receptor-ligand interactions in which different ligands stabilize different receptor conformations also for endogenous receptor ligands, with corresponding implications for drug development targeting CCR2.
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Affiliation(s)
- Yamina A Berchiche
- Department of Biochemistry, Université de Montréal, Montréal, Québec, Canada
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Toxins-useful biochemical tools for leukocyte research. Toxins (Basel) 2010; 2:428-52. [PMID: 22069594 PMCID: PMC3153219 DOI: 10.3390/toxins2040428] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 03/24/2010] [Indexed: 12/28/2022] Open
Abstract
Leukocytes are a heterogeneous group of cells that display differences in anatomic localization, cell surface phenotype, and function. The different subtypes include e.g., granulocytes, monocytes, dendritic cells, T cells, B cells and NK cells. These different cell types represent the cellular component of innate and adaptive immunity. Using certain toxins such as pertussis toxin, cholera toxin or clostridium difficile toxin, the regulatory functions of Gαi, Gαs and small GTPases of the Rho family in leukocytes have been reported. A summary of these reports is discussed in this review.
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May LT, Briddon SJ, Hill SJ. Antagonist selective modulation of adenosine A1 and A3 receptor pharmacology by the food dye Brilliant Black BN: evidence for allosteric interactions. Mol Pharmacol 2010; 77:678-86. [PMID: 20086038 DOI: 10.1124/mol.109.063065] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Allosteric binding sites on the adenosine receptor family represent potential therapeutic targets for a number of conditions involving metabolic stress. This study has identified Brilliant Black BN as a novel allosteric modulator of the adenosine A(1) and A(3) receptors. In addition to being a food dye and pharmaceutical excipient, Brilliant Black BN is commonly used within calcium mobilization assays to quench extracellular fluorescence. Brilliant Black BN (5-500 microM) had no significant effect on the calcium mobilization stimulated by the nonselective adenosine receptor agonist 5'-(N-ethylcarboxamido)adenosine in Chinese hamster ovary cells stably transfected with the human adenosine A(1) or A(3) receptor. Likewise, calcium mobilization and radioligand binding assays found that Brilliant Black BN (5-500 microM) did not significantly influence the antagonism mediated by 8-cyclopentyl-1,3-dipropylxanthine (100 nM) at the A(1) receptor. In contrast, the affinity of N-[9-chloro-2-(2-furanyl)[1,2,4]-triazolo[1,5-c]quinazolin-5-yl]benzene acetamide (MRS1220) at the A(3) receptor and xanthine amine congener (XAC) and XAC-X-BY630 at the A(1) and A(3) receptors was significantly decreased in the presence of 500 muM Brilliant Black BN. A reduction in XAC potency at the A(1) and A(3) receptor was achieved within 1 min of Brilliant Black BN addition, despite receptors having been pre-equilibrated with antagonist. Dissociation kinetics of the fluorescent XAC derivative, XAC-X-BY630, revealed that the decrease in affinity is probably due to a significant increase in dissociation rate of the antagonist in the presence of Brilliant Black BN. Taken together, these results suggest that Brilliant Black BN can act allosterically to modify ligand affinity at A(1) and A(3) receptors.
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Affiliation(s)
- L T May
- Institute of Cell Signaling, The University of Nottingham Medical School, Queen's Medical Centre, Nottingham NG7 2UH, UK
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Distinct modes of molecular regulation of CCL3 induced calcium flux in monocytic cells. Biochem Pharmacol 2009; 78:974-82. [DOI: 10.1016/j.bcp.2009.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 05/30/2009] [Accepted: 06/02/2009] [Indexed: 11/19/2022]
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Cheung R, Malik M, Ravyn V, Tomkowicz B, Ptasznik A, Collman RG. An arrestin-dependent multi-kinase signaling complex mediates MIP-1beta/CCL4 signaling and chemotaxis of primary human macrophages. J Leukoc Biol 2009; 86:833-45. [PMID: 19620252 DOI: 10.1189/jlb.0908551] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
MIP-1beta/CCL4 is a principal regulator of macrophage migration and signals through CCR5. Several protein kinases are linked to CCR5 in macrophages including the src kinase Lyn, PI3K, focal adhesion related kinase Pyk2, and members of the MAPK family, but whether and how these kinases regulate macrophage chemotaxis are not known. To define the role of these signaling molecules, we examined the functions and interactions of endogenous proteins in primary human macrophages. Using siRNA gene silencing and pharmacologic inhibition, we show that chemotaxis in response to CCR5 stimulation by MIP-1beta requires activation of Pyk2, PI3K p85, and Lyn, as well as MAPK ERK. MIP-1beta activation of CCR5 triggered translocation of Pyk2 and PI3K p85 from the cytoplasm to colocalize with Lyn at the plasma membrane with formation of a multimolecular complex. We show further that arrestins were recruited into the complex, and arrestin down-regulation impaired complex formation and macrophage chemotaxis toward MIP-1beta. Together, these results identify a novel mechanism of chemokine receptor regulation of chemotaxis and suggest that arrestins may serve as scaffolding proteins linking CCR5 to multiple downstream signaling molecules in a biologically important primary human cell type.
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Affiliation(s)
- Ricky Cheung
- Pulmonary, Allergy and Critical Care, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6061, USA
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CCR5 internalisation and signalling have different dependence on membrane lipid raft integrity. Cell Signal 2008; 20:1687-94. [PMID: 18573334 DOI: 10.1016/j.cellsig.2008.05.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Accepted: 05/26/2008] [Indexed: 11/23/2022]
Abstract
The chemokine receptor, CCR5, acts as a co-receptor for human immunodeficiency virus entry into cells. CCR5 has been shown to be targeted to cholesterol- and sphingolipid-rich membrane microdomains termed lipid rafts or caveolae. Cholesterol is essential for CCL4 binding to CCR5 and for keeping the conformational integrity of the receptor. Filipin treatment leads to loss of caveolin-1 from the membrane and therefore to a collapse of the caveolae. We have found here that sequestration of membrane cholesterol with filipin did not affect receptor signalling, however a loss of ligand-induced internalisation of CCR5 was observed. Cholesterol extraction with methyl-beta-cyclodextrin (MCD) reduced signalling through CCR5 as measured by release of intracellular Ca(2+) and completely abolished the inhibition of forskolin-stimulated cAMP accumulation with no effect on internalisation. Pertussis toxin (PTX) treatment inhibited the intracellular release of calcium that is transduced via Galphai G-proteins. Depletion of cholesterol destroyed microdomains in the membrane and switched CCR5/G-protein coupling to a PTX-independent G-protein. We conclude that cholesterol in the membrane is essential for CCR5 signalling via the Galphai G-protein subunit, and that integrity of lipid rafts is not essential for effective CCR5 internalisation however it is crucial for proper CCR5 signal transduction via Galphai G-proteins.
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