All Outputs (36)

GRK mediates ?-opioid receptor plasma membrane reorganization (2019)
Journal Article
Gondin, A. B., Halls, M. L., Canals, M., & Briddon, S. J. (2019). GRK mediates ?-opioid receptor plasma membrane reorganization. Frontiers in Molecular Neuroscience, 12, https://doi.org/10.3389/fnmol.2019.00104

Differential regulation of the ?-opioid receptor (MOP) has been linked to the development of opioid tolerance and dependence which both limit the clinical use of opioid analgesics. At a cellular level, MOP regulation occurs via receptor phosphorylati... Read More about GRK mediates ?-opioid receptor plasma membrane reorganization.

A live cell NanoBRET binding assay allows the study of ligand-binding kinetics to the adenosine A3 receptor (2019)
Journal Article
Bouzo-Lorenzo, M., Stoddart, L. A., Xia, L., Jerzman, A. P., Heitman, L. H., Briddon, S. J., & Hill, S. J. (2019). A live cell NanoBRET binding assay allows the study of ligand-binding kinetics to the adenosine A3 receptor. Purinergic Signalling, 15(2), 139–153. https://doi.org/10.1007/s11302-019-09650-9

There is a growing interest in understanding the binding kinetics of compounds that bind to G proteincoupled receptors prior to progressing a lead compound into clinical trials. The widely expressed adenosine A3 receptor (A3AR) has been implicated in... Read More about A live cell NanoBRET binding assay allows the study of ligand-binding kinetics to the adenosine A3 receptor.

Structure-based exploration and pharmacological evaluation of N-substituted piperidin-4-yl-methanamine CXCR4 chemokine receptor antagonists (2018)
Journal Article
Adlere, I., Sun, S., Zarca, A., Roumen, L., Gozelle, M., Viciano, C. P., …Leurs, R. (2019). Structure-based exploration and pharmacological evaluation of N-substituted piperidin-4-yl-methanamine CXCR4 chemokine receptor antagonists. European Journal of Medicinal Chemistry, 162, 631-649. https://doi.org/10.1016/j.ejmech.2018.10.060

Using the available structural information of the chemokine receptor CXCR4, we present hit finding and hit exploration studies that make use of virtual fragment screening, design, synthesis and structure-activity relationship (SAR) studies. Fragment... Read More about Structure-based exploration and pharmacological evaluation of N-substituted piperidin-4-yl-methanamine CXCR4 chemokine receptor antagonists.

Micro-pharmacokinetics: quantifying local drug concentration at live cell membranes (2018)
Journal Article
Gherbi, K., Briddon, S. J., & Charlton, S. J. (in press). Micro-pharmacokinetics: quantifying local drug concentration at live cell membranes. Scientific Reports, 8, Article 3479. https://doi.org/10.1038/s41598-018-21100-x

Fundamental equations for determining pharmacological parameters, such as the binding afnity of a ligand for its target receptor, assume a homogeneous distribution of ligand, with concentrations in the immediate vicinity of the receptor being the sam... Read More about Micro-pharmacokinetics: quantifying local drug concentration at live cell membranes.

Development of novel fluorescent histamine H?-receptor antagonists to study ligand-binding kinetics in living cells (2018)
Journal Article
Stoddart, L. A., Vernall, A. J., Bouzo-Lorenzo, M., Bosma, R., Kooistra, A. J., de Graaf, C., …Hill, S. J. (2018). Development of novel fluorescent histamine H₁-receptor antagonists to study ligand-binding kinetics in living cells. Scientific Reports, 8, Article 1572. https://doi.org/10.1038/s41598-018-19714-2

The histamine H1-receptor (H1R) is an important mediator of allergy and inflammation. H1R antagonists have particular clinical utility in allergic rhinitis and urticaria. Here we have developed six novel fluorescent probes for this receptor that are... Read More about Development of novel fluorescent histamine H?-receptor antagonists to study ligand-binding kinetics in living cells.

Fluorescently Labeled Morphine Derivatives for Bioimaging Studies (2018)
Journal Article
Lam, R., Gondin, A. B., Canals, M., Kellam, B., Briddon, S. J., Graham, B., & Scammells, P. J. (2018). Fluorescently Labeled Morphine Derivatives for Bioimaging Studies. Journal of Medicinal Chemistry, 61(3), 1316-1329. https://doi.org/10.1021/acs.jmedchem.7b01811

Opioids, like morphine, are the mainstay analgesics for the treatment and control of pain. Despite this, they often exhibit severe side effects that limit dose; patients often become tolerant and dependent on these drugs, which remains a major health... Read More about Fluorescently Labeled Morphine Derivatives for Bioimaging Studies.

A non-imaging high throughput approach to chemical library screening at the unmodified adenosine-A3 receptor in living cells (2017)
Journal Article
Arruda, M. A., Stoddart, L. A., Gherbi, K., Briddon, S. J., Kellam, B., & Hill, S. J. (in press). A non-imaging high throughput approach to chemical library screening at the unmodified adenosine-A3 receptor in living cells. Frontiers in Pharmacology, 8(908), https://doi.org/10.3389/fphar.2017.00908

Recent advances in fluorescent ligand technology have enabled the study of G protein-coupled receptors in their native environment without the need for genetic modification such as addition of N-terminal fluorescent or bioluminescent tags. Here, we h... Read More about A non-imaging high throughput approach to chemical library screening at the unmodified adenosine-A3 receptor in living cells.

Real-time analysis of the binding of fluorescent VEGF165a to VEGFR2 in living cells: Effect of receptor tyrosine kinase inhibitors and fate of internalized agonist-receptor complexes (2017)
Journal Article
Kilpatrick, L. E., Friedman-Ohana, R., Alcobia, D. C., Riching, K., Peach, C. J., Wheal, A. J., …Hill, S. J. (2017). Real-time analysis of the binding of fluorescent VEGF165a to VEGFR2 in living cells: Effect of receptor tyrosine kinase inhibitors and fate of internalized agonist-receptor complexes. Biochemical Pharmacology, 136, 62-75. https://doi.org/10.1016/j.bcp.2017.04.006

© 2017 The Authors Vascular endothelial growth factor (VEGF) is an important mediator of angiogenesis. Here we have used a novel stoichiometric protein-labeling method to generate a fluorescent variant of VEGF (VEGF165a-TMR) labeled on a single cyste... Read More about Real-time analysis of the binding of fluorescent VEGF165a to VEGFR2 in living cells: Effect of receptor tyrosine kinase inhibitors and fate of internalized agonist-receptor complexes.

Synthesis, Biological Evaluation, and Utility of Fluorescent Ligands Targeting the ?-Opioid Receptor (2015)
Journal Article
Schembri, L. S., Stoddart, L. A., Briddon, S. J., Kellam, B., Canals, M., Graham, B., & Scammells, P. J. (2015). Synthesis, Biological Evaluation, and Utility of Fluorescent Ligands Targeting the ?-Opioid Receptor. Journal of Medicinal Chemistry, 58(24), 9754-9767. https://doi.org/10.1021/acs.jmedchem.5b01664

Fluorescently labeled ligands are useful pharmacological research tools for studying receptor localization, trafficking, and signaling processes via fluorescence imaging. They are also employed in fluorescent binding assays. This study is centered on... Read More about Synthesis, Biological Evaluation, and Utility of Fluorescent Ligands Targeting the ?-Opioid Receptor.

Plasma membrane dynamics and tetrameric organisation of ABCG2 transporters in mammalian cells revealed by single particle imaging techniques (2015)
Journal Article
Wong, K., Briddon, S. J., Holliday, N. D., & Kerr, I. D. (2016). Plasma membrane dynamics and tetrameric organisation of ABCG2 transporters in mammalian cells revealed by single particle imaging techniques. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, 1863(1), 19-29. https://doi.org/10.1016/j.bbamcr.2015.10.002

ABCG2 is one of three human ATP binding cassette (ABC) transporters involved in the export from cells of a chemically and structurally diverse range of compounds. This multidrug efflux capability, together with a broad tissue distribution in the body... Read More about Plasma membrane dynamics and tetrameric organisation of ABCG2 transporters in mammalian cells revealed by single particle imaging techniques.

Direct visualisation of internalization of the adenosine A3 receptor and localization with arrestin3 using a fluorescent agonist (2015)
Journal Article
Stoddart, L. A., Vernall, A. J., Briddon, S. J., Kellam, B., & Hill, S. J. (2015). Direct visualisation of internalization of the adenosine A3 receptor and localization with arrestin3 using a fluorescent agonist. Neuropharmacology, 98, 68-77. https://doi.org/10.1016/j.neuropharm.2015.04.013

Fluorescence based probes provide a novel way to study the dynamic internalization process of G protein-coupled receptors (GPCRs). Recent advances in the rational design of fluorescent ligands for GPCRs have been used here to generate new fluorescent... Read More about Direct visualisation of internalization of the adenosine A3 receptor and localization with arrestin3 using a fluorescent agonist.

Negative cooperativity across ?1-adrenoceptor homodimers provides insights into the nature of the secondary low-affinity CGP 12177 ?1-adrenoceptor binding conformation (2015)
Journal Article
Gherbi, K., May, L. T., Baker, J. G., Briddon, S. J., & Hill, S. J. (2015). Negative cooperativity across ?1-adrenoceptor homodimers provides insights into the nature of the secondary low-affinity CGP 12177 ?1-adrenoceptor binding conformation. FASEB Journal, 29(7), 2859-2871. https://doi.org/10.1096/fj.14-265199

At the β1-adrenoceptor, CGP 12177 potently antagonizes agonist responses at the primary high-affinity catecholamine conformation while also exerting agonist effects of its own through a secondary low-affinity conformation. A recent mutagenesis study... Read More about Negative cooperativity across ?1-adrenoceptor homodimers provides insights into the nature of the secondary low-affinity CGP 12177 ?1-adrenoceptor binding conformation.

Kinetic analysis of antagonist-occupied adenosine-A3 receptors within membrane microdomains of individual cells provides evidence of receptor dimerization and allosterism (2014)
Journal Article
Corriden, R., Kilpatrick, L. E., Kellam, B., Briddon, S. J., & Hill, S. J. (2014). Kinetic analysis of antagonist-occupied adenosine-A3 receptors within membrane microdomains of individual cells provides evidence of receptor dimerization and allosterism. FASEB Journal, 28(10), 4211-4222. https://doi.org/10.1096/fj.13-247270

© The Author(s). In our previous work, using a fluorescent adenosine-A3 receptor (A3AR) agonist and fluorescence correlation spectroscopy (FCS), we demonstrated highaffinity labeling of the active receptor (R∗) conformation. In the current study, we... Read More about Kinetic analysis of antagonist-occupied adenosine-A3 receptors within membrane microdomains of individual cells provides evidence of receptor dimerization and allosterism.

Effect of a toggle switch mutation in TM6 of the human adenosine A3 receptor on Gi protein-dependent signalling and Gi-independent receptor internalization (2014)
Journal Article
Stoddart, L. A., Kellam, B., Briddon, S. J., & Hill, S. J. (2014). Effect of a toggle switch mutation in TM6 of the human adenosine A3 receptor on Gi protein-dependent signalling and Gi-independent receptor internalization. British Journal of Pharmacology, 171(16), https://doi.org/10.1111/bph.12739

Background and Purpose: The highly conserved tryptophan (W6.48) in transmembrane domain 6 of GPCRs has been shown to play a central role in forming an active conformation in response to agonist binding. We set out to characterize the effect of this m... Read More about Effect of a toggle switch mutation in TM6 of the human adenosine A3 receptor on Gi protein-dependent signalling and Gi-independent receptor internalization.

Conversion of a non-selective adenosine receptor antagonist into A 3-selective high affinity fluorescent probes using peptide-based linkers (2013)
Journal Article
Vernall, A. J., Stoddart, L. A., Briddon, S. J., Ng, H. W., Laughton, C. A., Doughty, S. W., …Kellam, B. (2013). Conversion of a non-selective adenosine receptor antagonist into A 3-selective high affinity fluorescent probes using peptide-based linkers. Organic and Biomolecular Chemistry, 11(34), 5673-5682. https://doi.org/10.1039/c3ob41221k

Advances in fluorescence-based imaging technologies have helped propel the study of real-time biological readouts and analysis across many different areas. In particular the use of fluorescent ligands as chemical tools to study proteins such as G pro... Read More about Conversion of a non-selective adenosine receptor antagonist into A 3-selective high affinity fluorescent probes using peptide-based linkers.

Adenosine-A3 receptors in neutrophil microdomains promote the formation of bacteria-tethering cytonemes (2013)
Journal Article
Corriden, R., Self, T., Akong-Moore, K., Nizet, V., Kellam, B., Briddon, S. J., & Hill, S. J. (2013). Adenosine-A3 receptors in neutrophil microdomains promote the formation of bacteria-tethering cytonemes. EMBO Reports, 14(8), https://doi.org/10.1038/embor.2013.89

The A3‐adenosine receptor (A3AR) has recently emerged as a key regulator of neutrophil behaviour. Using a fluorescent A3AR ligand, we show that A3ARs aggregate in highly polarized immunomodulatory microdomains on human neutrophil membranes. In additi... Read More about Adenosine-A3 receptors in neutrophil microdomains promote the formation of bacteria-tethering cytonemes.