Skip Content
You are currently on the new version of our website. Access the old version .

43 Results Found

  • Review
  • Open Access
2 Citations
5,344 Views
19 Pages

19 October 2024

Neurodegenerative disorders, particularly Alzheimer’s and Parkinson’s diseases, continue to challenge modern medicine despite therapeutic advances. Orphan G-protein-coupled receptors (GPCRs) have emerged as promising targets in the centra...

  • Review
  • Open Access
12 Citations
5,708 Views
14 Pages

Recent studies have shed light on the diverse and complex roles of G-protein coupled receptors (GPCRs) in the pathophysiology of stroke. These receptors constitute a large family of seven transmembrane-spanning proteins that play an intricate role in...

  • Article
  • Open Access
2 Citations
4,011 Views
14 Pages

Computational Prediction of Compound–Protein Interactions for Orphan Targets Using CGBVS

  • Chisato Kanai,
  • Enzo Kawasaki,
  • Ryuta Murakami,
  • Yusuke Morita and
  • Atsushi Yoshimori

24 August 2021

A variety of Artificial Intelligence (AI)-based (Machine Learning) techniques have been developed with regard to in silico prediction of Compound–Protein interactions (CPI)—one of which is a technique we refer to as chemical genomics-based virtual sc...

  • Feature Paper
  • Review
  • Open Access
53 Citations
14,142 Views
32 Pages

24 June 2020

G protein coupled receptors (GPCRs) are the main mediators of signal transduction in the central nervous system. Therefore, it is not surprising that many GPCRs have long been investigated for their role in the development of anxiety and mood disorde...

  • Review
  • Open Access
13 Citations
7,738 Views
13 Pages

G-protein-coupled receptors (GPCRs) are an important source of drug targets with diverse therapeutic applications. However, there are still more than one hundred orphan GPCRs, whose ligands and functions remain unidentified. The suprachiasmatic nucle...

  • Article
  • Open Access
3 Citations
1,173 Views
18 Pages

Identification of a Novel Antagonist of BRS-3 from Natural Products and Its Protective Effects Against H2O2-Induced Cardiomyocyte Injury

  • Jihong Lu,
  • Lehao Wu,
  • Jianzheng Zhu,
  • Han Zhou,
  • Mingzhu Fang,
  • Hongshuo Liang,
  • Miao Guo,
  • Mo Chen,
  • Yuhang Zhu and
  • Yan Zhang
  • + 2 authors

The identification of exogenous ligands from natural products is an alternative strategy to explore the unrevealed physiological functions of orphan G-protein-coupled receptors (GPCRs). In this study, we have successfully identified and pharmacologic...

  • Article
  • Open Access
21 Citations
7,670 Views
19 Pages

Computational Investigations on the Binding Mode of Ligands for the Cannabinoid-Activated G Protein-Coupled Receptor GPR18

  • Alexander Neumann,
  • Viktor Engel,
  • Andhika B. Mahardhika,
  • Clara T. Schoeder,
  • Vigneshwaran Namasivayam,
  • Katarzyna Kieć-Kononowicz and
  • Christa E. Müller

29 April 2020

GPR18 is an orphan G protein-coupled receptor (GPCR) expressed in cells of the immune system. It is activated by the cannabinoid receptor (CB) agonist ∆9-tetrahydrocannabinol (THC). Several further lipids have been proposed to act as GPR18 agonists,...

  • Communication
  • Open Access
6 Citations
2,954 Views
9 Pages

27 November 2021

G-protein-coupled receptors (GPCRs) are commonly pharmacologically modulated due to their ability to translate extracellular events to intracellular changes. Previously, studies have mostly focused on protein–protein interactions, but the focus...

  • Article
  • Open Access
1 Citations
3,210 Views
22 Pages

Proximity Interactome Analysis of Super Conserved Receptors Expressed in the Brain Identifies EPB41L2, SLC3A2, and LRBA as Main Partners

  • Abeer Kaafarani,
  • Romain Darche-Gabinaud,
  • Xavier Bisteau,
  • Virginie Imbault,
  • Valérie Wittamer,
  • Marc Parmentier and
  • Isabelle Pirson

14 November 2023

The Super-Conserved Receptors Expressed in the Brain (SREBs) form a subfamily of orphan G protein-coupled receptors, highly conserved in evolution and characterized by a predominant expression in the brain. The signaling pathways activated by these r...

  • Review
  • Open Access
34 Citations
9,043 Views
14 Pages

Hedgehog and Gpr161: Regulating cAMP Signaling in the Primary Cilium

  • Philipp Tschaikner,
  • Florian Enzler,
  • Omar Torres-Quesada,
  • Pia Aanstad and
  • Eduard Stefan

3 January 2020

Compartmentalization of diverse types of signaling molecules contributes to the precise coordination of signal propagation. The primary cilium fulfills this function by acting as a spatiotemporally confined sensory signaling platform. For the integri...

  • Article
  • Open Access
3,937 Views
25 Pages

Structure Prediction, Evaluation, and Validation of GPR18 Lipid Receptor Using Free Programs

  • Ilona Michalik,
  • Kamil J. Kuder,
  • Katarzyna Kieć-Kononowicz and
  • Jadwiga Handzlik

The GPR18 receptor, often referred to as the N-arachidonylglycine receptor, although assigned (along with GPR55 and GPR119) to the new class A GPCR subfamily-lipid receptors, officially still has the status of a class A GPCR orphan. While its signali...

  • Article
  • Open Access
11 Citations
4,425 Views
18 Pages

The GPR18 Agonist PSB-KD-107 Exerts Endothelium-Dependent Vasorelaxant Effects

  • Magdalena Kotańska,
  • Monika Kubacka,
  • Marek Bednarski,
  • Noemi Nicosia,
  • Małgorzata Szafarz,
  • Wojciech Jawień,
  • Christa E. Müller and
  • Katarzyna Kieć-Kononowicz

13 August 2021

GPR18 is an orphan GPCR that is activated by the cannabinoid tetrahydrocannabinol (THC). Emerging evidence indicates its involvement in the control of cardiovascular functions, including heart rate, contractility, vascular tone, as well as blood pres...

  • Article
  • Open Access
2 Citations
3,773 Views
18 Pages

Metabolic Profiling of Mice with Deletion of the Orphan G Protein-Coupled Receptor, GPR37L1

  • Margaret A. Mouat,
  • Brendan P. Wilkins,
  • Eileen Ding,
  • Hemna Govindaraju,
  • James L. J. Coleman,
  • Robert M. Graham,
  • Nigel Turner and
  • Nicola J. Smith

1 June 2022

Understanding the neurogenic causes of obesity may reveal novel drug targets to counter the obesity crisis and associated sequelae. Here, we investigate whether the deletion of GPR37L1, an astrocyte-specific orphan G protein-coupled receptor, affects...

  • Article
  • Open Access
2 Citations
2,748 Views
12 Pages

Is the Neuropeptide PEN a Ligand of GPR83?

  • Yvonne Giesecke,
  • Vahid Asimi,
  • Valentina Stulberg,
  • Gunnar Kleinau,
  • Patrick Scheerer,
  • Beate Koksch and
  • Carsten Grötzinger

12 October 2023

G protein-coupled receptor 83 (GPR83) is a class A G protein-coupled receptor with predominant expression in the cerebellum and proposed function in the regulation of food intake and in anxiety-like behavior. The neuropeptide PEN has been suggested a...

  • Article
  • Open Access
10 Citations
4,977 Views
16 Pages

Orphan G-Protein Coupled Receptor GPRC5B Is Critical for Lymphatic Development

  • Wenjing Xu,
  • Nathan P. Nelson-Maney,
  • László Bálint,
  • Hyouk-Bum Kwon,
  • Reema B. Davis,
  • Danielle C. M. Dy,
  • James M. Dunleavey,
  • Brad St. Croix and
  • Kathleen M. Caron

Numerous studies have focused on the molecular signaling pathways that govern the development and growth of lymphatics in the hopes of elucidating promising druggable targets. G protein-coupled receptors (GPCRs) are currently the largest family of me...

  • Review
  • Open Access
56 Citations
14,994 Views
13 Pages

19 June 2015

G protein-coupled receptors (GPCRs) are the most common targets of the neuropharmacological drugs in the central nervous system (CNS). GPCRs are activated by manifold neurotransmitters, and their activation in turn evokes slow synaptic transmission....

  • Article
  • Open Access
981 Views
35 Pages

KLF14 and SREBF-1 Binding Site Associations with Orphan Receptor Promoters in Metabolic Syndrome

  • Julio Jesús Garcia-Coste,
  • Santiago Villafaña-Rauda,
  • Karla Aidee Aguayo-Cerón,
  • Cruz Vargas-De-León and
  • Rodrigo Romero-Nava

This study investigated the relationship between the transcription factors (TFs) KLF14 and SREBF-1 and orphan receptors (ORs) in the context of metabolic syndrome (MetS). A detailed bioinformatics analysis identified a significant association between...

  • Article
  • Open Access
19 Citations
4,081 Views
15 Pages

16 May 2021

Olfactory receptors (ORs) account for 49% of all G protein-coupled receptors (GPCRs), which are important targets for drug discovery, and hence ORs may also be potential drug targets. Various ORs are expressed in breast cancer cells; however, most of...

  • Review
  • Open Access
6 Citations
6,616 Views
31 Pages

Mind the Gap—Deciphering GPCR Pharmacology Using 3D Pharmacophores and Artificial Intelligence

  • Theresa Noonan,
  • Katrin Denzinger,
  • Valerij Talagayev,
  • Yu Chen,
  • Kristina Puls,
  • Clemens Alexander Wolf,
  • Sijie Liu,
  • Trung Ngoc Nguyen and
  • Gerhard Wolber

22 October 2022

G protein-coupled receptors (GPCRs) are amongst the most pharmaceutically relevant and well-studied protein targets, yet unanswered questions in the field leave significant gaps in our understanding of their nuanced structure and function. Three-dime...

  • Article
  • Open Access
5 Citations
3,562 Views
22 Pages

Orphan GPR26 Counteracts Early Phases of Hyperglycemia-Mediated Monocyte Activation and Is Suppressed in Diabetic Patients

  • Zahra Abedi Kichi,
  • Lucia Natarelli,
  • Saeed Sadeghian,
  • Mohammad ali Boroumand,
  • Mehrdad Behmanesh and
  • Christian Weber

Diabetes is the ninth leading cause of death, with an estimated 1.5 million deaths worldwide. Type 2 diabetes (T2D) results from the body’s ineffective use of insulin and is largely the result of excess body weight and physical inactivity. T2D...

  • Article
  • Open Access
15 Citations
11,715 Views
13 Pages

A Rapid and Efficient Immunoenzymatic Assay to Detect Receptor Protein Interactions: G Protein-Coupled Receptors

  • Elisa Zappelli,
  • Simona Daniele,
  • Maria P. Abbracchio,
  • Claudia Martini and
  • Maria Letizia Trincavelli

11 April 2014

G protein-coupled receptors (GPCRs) represent one of the largest families of cell surface receptors, and are the target of at least one-third of the current therapeutic drugs on the market. Along their life cycle, GPCRs are accompanied by a range of...

  • Article
  • Open Access
9 Citations
3,855 Views
14 Pages

GPR55 and GPR119 Receptors Contribute to the Processing of Neuropathic Pain in Rats

  • Ángel Zúñiga-Romero,
  • Quetzali Rivera-Plata,
  • Jesús Arrieta,
  • Francisco Javier Flores-Murrieta,
  • Juan Rodríguez-Silverio,
  • Juan Gerardo Reyes-García,
  • Juan Carlos Huerta-Cruz,
  • Gustavo Ramírez-Martínez and
  • Héctor Isaac Rocha-González

5 January 2022

Orphan G-protein-coupled receptors (GPCR) comprise a large number of receptors which are widely distributed in the nervous system and represent an opportunity to identify new molecular targets in pain medicine. GPR55 and GPR119 are two orphan GPCR re...

  • Review
  • Open Access
10 Citations
7,084 Views
16 Pages

Research Status of the Orphan G Protein Coupled Receptor 158 and Future Perspectives

  • Xianan Fu,
  • Shoupeng Wei,
  • Tao Wang,
  • Hengxin Fan,
  • Ying Zhang,
  • Clive Da Costa,
  • Sebastian Brandner,
  • Guang Yang,
  • Yihang Pan and
  • Ningning Li
  • + 1 author

14 April 2022

G-protein-coupled receptors (GPCRs) remain one of the most successful targets for therapeutic drugs approved by the US Food and Drug Administration (FDA). Many novel orphan GPCRs have been identified by human genome sequencing and considered as putat...

  • Review
  • Open Access
2 Citations
7,048 Views
34 Pages

30 January 2025

A comprehensive review of studies describing the role of G-protein coupled receptor (GPCR) behaviour contributing to metastasis in cancer, and the developments of biotherapeutic drugs towards targeting them, provides a valuable resource toward improv...

  • Article
  • Open Access
20 Citations
3,696 Views
16 Pages

Adhesion G-protein-coupled receptors (aGPCRs)—a major family of GPCRs—play critical roles in the regulation of tissue development and cancer progression. The orphan receptor GPR97, activated by glucocorticoid stress hormones, is a prototy...

  • Article
  • Open Access
10 Citations
4,487 Views
14 Pages

The Activation of GPR27 Increases Cytosolic L-Lactate in 3T3 Embryonic Cells and Astrocytes

  • Dorian Dolanc,
  • Tomaž M. Zorec,
  • Zala Smole,
  • Anja Maver,
  • Anemari Horvat,
  • Thanigaimalai Pillaiyar,
  • Saša Trkov Bobnar,
  • Nina Vardjan,
  • Marko Kreft and
  • Robert Zorec
  • + 1 author

16 March 2022

G-protein-coupled receptors (GPCRs) represent a family with over 800 members in humans, and one-third of these are targets for approved drugs. A large number of GPCRs have unknown physiologic roles. Here, we investigated GPR27, an orphan GPCR belongi...

  • Article
  • Open Access
12 Citations
5,594 Views
16 Pages

Protein-protein interactions between G protein-coupled receptors (GPCRs) can augment their functionality and increase the repertoire of signaling pathways they regulate. New therapeutics designed to modulate such interactions may allow for targeting...

  • Article
  • Open Access
8 Citations
3,773 Views
17 Pages

14 February 2022

Human cytomegalovirus (HCMV) encodes four homologs of G protein coupled receptors (vGPCRs), of which two, designated UL33 and US28, signal constitutively. UL33 and US28 are also conserved with chemokine receptors: US28 binds numerous chemokine classe...

  • Review
  • Open Access
2 Citations
5,747 Views
21 Pages

GPR75: Advances, Challenges in Deorphanization, and Potential as a Novel Drug Target for Disease Treatment

  • Jingyi Han,
  • Jiaojiao Li,
  • Sirui Yao,
  • Zao Wei,
  • Hui Jiang,
  • Tao Xu,
  • Junwei Zeng,
  • Lin Xu and
  • Yong Han

G protein-coupled receptor 75 (GPR75), a novel member of the rhodopsin-like G protein-coupled receptor (GPCR) family, has been identified across various tissues and organs, where it contributes to biological regulation and disease progression. Recent...

  • Article
  • Open Access
11 Citations
5,148 Views
21 Pages

Towards A Molecular Understanding of The Cannabinoid Related Orphan Receptor GPR18: A Focus on Its Constitutive Activity

  • Noori Sotudeh,
  • Paula Morales,
  • Dow P. Hurst,
  • Diane L. Lynch and
  • Patricia H. Reggio

The orphan G-protein coupled receptor (GPCR), GPR18, has been recently proposed as a potential member of the cannabinoid family as it recognizes several endogenous, phytogenic, and synthetic cannabinoids. Potential therapeutic applications for GPR18...

  • Review
  • Open Access
10 Citations
4,618 Views
11 Pages

Growth hormone secretagogue receptor 1a (GHS-R1a), which is one of the G protein-coupled receptors (GPCRs), is involved in various physiological actions such as energy consumption, growth hormone secretion promoting action, and cardiovascular protect...

  • Article
  • Open Access
1 Citations
4,109 Views
32 Pages

GPR19 Coordinates Multiple Molecular Aspects of Stress Responses Associated with the Aging Process

  • Stuart Maudsley,
  • Claudia Schrauwen,
  • İrem Harputluoğlu,
  • Deborah Walter,
  • Hanne Leysen and
  • Patricia McDonald

G protein-coupled receptors (GPCRs) play a significant role in controlling biological paradigms such as aging and aging-related disease. We have previously identified receptor signaling systems that are specifically associated with controlling molecu...

  • Article
  • Open Access
1,710 Views
14 Pages

20 February 2025

Bombesin receptor subtype-3 (BRS-3) is a type 1 G-protein-coupled receptor (GPCR). BRS-3 is an orphan GPCR that is structurally related to neuromedin B and gastrin-releasing peptide receptors. When activated, BRS-3 causes phosphatidylinositol turnove...

  • Review
  • Open Access
40 Citations
6,430 Views
28 Pages

20 January 2021

Cannabinoids have shown to exert their therapeutic actions through a variety of targets. These include not only the canonical cannabinoid receptors CB1R and CB2R but also related orphan G protein-coupled receptors (GPCRs), ligand-gated ion channels,...

  • Abstract
  • Open Access
2,084 Views
1 Page

Design of Novel GPR6 Inverse Agonists Using a Fragment Replacement Scaffold Hopping Approach

  • Israa Isawi,
  • Paula Morales,
  • Dow Hurst,
  • Nadine Jagerovic and
  • Patricia Reggio

The orphan G protein coupled receptor 6 (GPR6) is a cannabinoid-related Class A GPCR. It is highly expressed in the central nervous system and exhibits high constitutive activation of adenylyl cyclase. Several research groups have demonstrated that G...

  • Review
  • Open Access
98 Citations
12,772 Views
16 Pages

Melatonin Receptor Genes in Vertebrates

  • Di Yan Li,
  • David Glenn Smith,
  • Rüdiger Hardeland,
  • Ming Yao Yang,
  • Huai Liang Xu,
  • Long Zhang,
  • Hua Dong Yin and
  • Qing Zhu

27 May 2013

Melatonin receptors are members of the G protein-coupled receptor (GPCR) family. Three genes for melatonin receptors have been cloned. The MT1 (or Mel1a or MTNR1A) and MT2 (or Mel1b or MTNR1B) receptor subtypes are present in humans and other mammals...

  • Review
  • Open Access
7 Citations
3,981 Views
13 Pages

GPR37 Receptors and Megalencephalic Leukoencephalopathy with Subcortical Cysts

  • Adrià Pla-Casillanis,
  • Laura Ferigle,
  • Marta Alonso-Gardón,
  • Efren Xicoy-Espaulella,
  • Ekaitz Errasti-Murugarren,
  • Daniela Marazziti and
  • Raúl Estévez

Megalencephalic leukoencephalopathy with subcortical cysts (MLC) is a rare type of vacuolating leukodystrophy (white matter disorder), which is mainly caused by defects in MLC1 or glial cell adhesion molecule (GlialCAM) proteins. In addition, autoant...

  • Article
  • Open Access
22 Citations
5,962 Views
18 Pages

12 October 2020

In Parkinson’s disease, mitochondrial oxidative stress-mediated apoptosis is a major cause of dopaminergic neuronal loss in the substantia nigra (SN). G protein-coupled receptor 4 (GPR4), previously recognised as an orphan G protein coupled-rec...

  • Article
  • Open Access
10 Citations
4,455 Views
17 Pages

A Reference Genome of Bursaphelenchus mucronatus Provides New Resources for Revealing Its Displacement by Pinewood Nematode

  • Shuangyang Wu,
  • Shenghan Gao,
  • Sen Wang,
  • Jie Meng,
  • Jacob Wickham,
  • Sainan Luo,
  • Xinyu Tan,
  • Haiying Yu,
  • Yujia Xiang and
  • Jianghua Sun
  • + 2 authors

19 May 2020

The Bursaphelenchus mucronatus, which was highly similar with Bursaphelenchus xylophilus in terms of morphological characteristics and biological properties—but had weaker pathogenicity to forests—was a native species often displaced by B...

  • Review
  • Open Access
942 Views
23 Pages

11 December 2025

The cannabinoid receptor type 2 (CB2) is increasingly recognized as a crucial regulator of neuroimmune balance in the brain. In addition to its well-established role in immunity, the CB2 receptor has been identified in specific populations of neurons...

  • Article
  • Open Access
8 Citations
3,548 Views
22 Pages

Adhesion G Protein-Coupled Receptor G2 Promotes Hepatocellular Carcinoma Progression and Serves as a Neutrophil-Related Prognostic Biomarker

  • Qian Wu,
  • Pei Wang,
  • Qihang Peng,
  • Zhongcui Kang,
  • Yiting Deng,
  • Jiayi Li,
  • Ying Chen,
  • Jin Li and
  • Feng Ge

30 November 2023

Adhesion G protein-coupled receptor G2 (ADGRG2) is an orphan adhesion G protein-coupled receptor (GPCR), which performs a tumor-promoting role in certain cancers; however, it has not been systematically investigated in hepatocellular carcinoma (HCC)....

  • Article
  • Open Access
20 Citations
7,105 Views
23 Pages

An Integrated Pan-Cancer Analysis and Structure-Based Virtual Screening of GPR15

  • Yanjing Wang,
  • Xiangeng Wang,
  • Yi Xiong,
  • Cheng-Dong Li,
  • Qin Xu,
  • Lu Shen,
  • Aman Chandra Kaushik and
  • Dong-Qing Wei

10 December 2019

G protein-coupled receptor 15 (GPR15, also known as BOB) is an extensively studied orphan G protein-coupled receptors (GPCRs) involving human immunodeficiency virus (HIV) infection, colonic inflammation, and smoking-related diseases. Recently, GPR15...

  • Article
  • Open Access
13 Citations
3,360 Views
21 Pages

Surface Electrical Impedance Myography Detects Skeletal Muscle Atrophy in Aged Wildtype Zebrafish and Aged gpr27 Knockout Zebrafish

  • Seward B. Rutkove,
  • Zsu-Zsu Chen,
  • Sarbesh Pandeya,
  • Santiago Callegari,
  • Tyler Mourey,
  • Janice A. Nagy and
  • Anjali K. Nath

Throughout a vertebrate organism’s lifespan, skeletal muscle mass and function progressively decline. This age-related condition is termed sarcopenia. In humans, sarcopenia is associated with risk of falling, cardiovascular disease, and all-cau...