scholarly journals Structure-Based Approaches to Ligands for G-Protein-Coupled Adenosine and P2Y Receptors, from Small Molecules to Nanoconjugates

2013 ◽  
Vol 56 (10) ◽  
pp. 3749-3767 ◽  
Author(s):  
Kenneth A. Jacobson
2020 ◽  
Vol 3 (4) ◽  
pp. 257-264
Author(s):  
Catherine J Hutchings

Abstract Antibodies are now well established as therapeutics with many additional advantages over small molecules and peptides relative to their selectivity, bioavailability, half-life and effector function. Major classes of membrane-associated protein targets include G protein-coupled receptors (GPCRs) and ion channels that are linked to a wide range of disease indications across all therapeutic areas. This mini-review summarizes the antibody target landscape for both GPCRs and ion channels as well as current progress in the respective research and development pipelines with some example case studies highlighted from clinical studies, including those being evaluated for the treatment of symptoms in COVID-19 infection.


2015 ◽  
Vol 473 ◽  
pp. 41-45 ◽  
Author(s):  
Patrick Ross ◽  
Wilhelm Weihofen ◽  
Fai Siu ◽  
Amy Xie ◽  
Hetal Katakia ◽  
...  

2004 ◽  
Vol 57 (9) ◽  
pp. 855 ◽  
Author(s):  
David P. Fairlie

Small molecules designed to mimic specific structural components of a protein (peptide strands, sheets, turns, helices, or amino acids) can be expected to display agonist or antagonist biological responses by virtue of interacting with the same receptors that recognize the protein. Here we describe some minimalist approaches to structural mimetics of amino acids and of strand, turn, or helix segments of proteins. The designed molecules show potent and selective inhibition of protease, transferase, and phospholipase enzymes, or antagonism of G-protein coupled or transcriptional receptors, and have potent anti-tumour, anti-inflammatory, or antiviral activity.


2008 ◽  
Vol 51 (17) ◽  
pp. 5297-5303 ◽  
Author(s):  
Christina M. Taylor ◽  
Yaniv Barda ◽  
Oleg G. Kisselev ◽  
Garland R. Marshall

2003 ◽  
Vol 228 (2) ◽  
pp. 254-266 ◽  
Author(s):  
Kwok-Kuen Cheung ◽  
Mina Ryten ◽  
Geoffrey Burnstock

Author(s):  
Mizuho Horioka ◽  
Emilie Ceraudo ◽  
Emily Lorenzen ◽  
Thomas P. Sakmar ◽  
Thomas Huber

AbstractMany G protein-coupled receptors (GPCRs) signal through more than one subtype of heterotrimeric G proteins. For example, the C–C chemokine receptor type 5 (CCR5), which serves as a co-receptor to facilitate cellular entry of human immunodeficiency virus 1 (HIV-1), normally signals through the heterotrimeric G protein, Gi. However, CCR5 also exhibits G protein signaling bias and certain chemokine analogs can cause a switch to Gq pathways to induce Ca2+ signaling. We want to understand how much of the Ca2+ signaling from Gi-coupled receptors is due to G protein promiscuity and how much is due to transactivation and crosstalk with other receptors. We propose a possible mechanism underlying the apparent switching between different G protein signaling pathways. We show that chemokine-mediated Ca2+ flux in HEK293T cells expressing CCR5 can be primed and enhanced by ATP pretreatment. In addition, agonist-dependent lysosomal exocytosis results in the release of ATP to the extracellular milieu, which amplifies cellular signaling networks. ATP is quickly degraded via ADP and AMP to adenosine. ATP, ADP and adenosine activate different cell surface purinergic receptors. Endogenous Gq-coupled purinergic P2Y receptors amplify Ca2+ signaling and allow for Gi- and Gq-coupled receptor signaling pathways to converge. Associated secretory release of GPCR ligands, such as chemokines, opioids, and monoamines, should also lead to concomitant release of ATP with a synergistic effect on Ca2+ signaling. Our results suggest that crosstalk between ATP-activated purinergic receptors and other Gi-coupled GPCRs is an important cooperative mechanism to amplify the intracellular Ca2+ signaling response.


2012 ◽  
Vol 3 (7) ◽  
pp. 557-568 ◽  
Author(s):  
Jay W. Schneider ◽  
Sean C. Goetsch ◽  
Xiuyu Leng ◽  
Sara M. Ludwig ◽  
Jamie L. Russell ◽  
...  

Author(s):  
Xiaoqing Guo ◽  
Qin Li ◽  
Shulan Pi ◽  
Bo Hu ◽  
Yuanpeng Xia ◽  
...  

P2Y receptors (P2YRs), a δ group of rhodopsin-like G protein-coupled receptors (GPCRs), have many essential functions in physiology and pathology, such as platelet aggregation, immune responses, neuroprotective effects, inflammation, and cellular proliferation; thus, they are among the most researched therapeutic targets for use in the clinical treatment of diseases (e.g., clopidogrel, an antithrombotic drug, and Prolacria, a treatment for dry eye). Over the past two decades, GPCRs have been revealed to transmit signals as dimers to increase the diversity of signalling pathways or pharmacological activities. Many studies have frequently confirmed dimerization between P2YRs and other GPCRs due to their functions in cardiovascular and cerebrovascular processes in vivo and in vitro. Recently, some P2YR dimers that dynamically balance physiological functions in the body were shown to be involved in effective signal transduction and exert pathological pharmacological effects. In this review, we summarize the types, pharmacological changes, and active regulators of P2YR-related dimerization. In summary, our review delineates that P2YR-related dimers have new functions and pharmacological activities and maybe a novel direction to improve the effectiveness of medications such as thrombotic events associated with COVID-19.


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