| Nervous system;Endocrine system;Immune system | Pituitary, hypothalamus | Secretion, tumorigenesis | Cancer, pituitary tumors, gigantism | Abboud | Dayana | | University of Liege | Belgium |
| Nervous system | Brain | | CNS diseases in which glutamatergic transmission is disrupted | Acher | Francine | | University of Paris/CNRS | France |
| Endocrine system;Reproductive system | GnRH neurons, Kiss-peptin and KDY neurons, gonadotrophs, Leydig cells, granulosa and teka cells, spermatozoa | Mitochondrial dynamics, fertilization, reproductive hormones homeostasis | PTSD, insulin resistance, POCS | Andric | Silvana | | University of Novi Sad Faculty of Sciences | Serbia |
| Endocrine system;Gastrointestinal system | Intestine | Enterohormone secretion | Food intake disruption | Ardevol | Anna | | Universitat Rovira i Virgili | Spain |
| Endocrine system;Immune system;Gastrointestinal system | Gastrointestinal tissues | Endocrine system, intestinal system, GPCR responses, intestinal responses | Healthy and diseased (IBS, allergy, diabetes) | Bastiaan-Net | Shanna | | Wageningen UR; Food & Biobased Research | Netherlands |
| HEK293, CHO | Second messenger production, cell morphological changes, receptor desensitization | | Benkel | Tobias | | University of Bonn | Germany |
| Endocrine system | PVN, ARC | | Obesity | Biebermann | Heike | | Charite University Medicine Berlin | Germany |
| Nervous system;Endocrine system | | cAMP, FRET | | Birgul | Necla | | University of Bogazici | Turkey |
| Nervous system;Immune system | Pancreas, brain | Expression of GLI transcription factor | Cancer | Blanco-Canosa | Juan Bautista | | Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) | Spain |
| Nervous system;Endocrine system;Immune system;Reproductive system | Gonads and brain | Steroid secretion | Infertility and autism | Bozon | Veronique | | INRAe and University of Tours | France |
| Cardiovascular system | | Biased signaling | Hypertension | Chabbert | Marie | | CNRS | France |
| Nervous system | Tissue Cultures all types, Brain regions | Receptor activation, Desensitization, Autophagy, Endosomal signaling | Stress, Pain, Tolerance, Addiction, Depression | Georgoussi | Zafiroula (Iro) | | Institute of Biosciences and Applications/National Centre for Scientific Research "Demokritos" | Greece |
| Nervous system;Endocrine system;Immune system | Blood | Proliferation, immune function | Autoimmune disorders | Gruber | Christian | | Medical University of Vienna | Austria |
| Nervous system;Endocrine system | Brain, Pancreas | G protein activation and Arrestin recruitment | Psychiatry | Hauser | Alexander | | University of Denmark | Denmark |
| Cardiovascular system;Immune system | Different inflamed cell | Inflammatory cells | Inflammatory disease | Hoxha | Malvina | | Catholic University Our Lady of Good Counsel | Albania |
| Endocrine system;Cardiovascular system | Smooth muscle cells | G-protein activation | Hypertension | Hunyady | Laszlo | | Research Centre for Natural Sciences | Hungary |
| Endocrine system;Reproductive system | | cAMP, PKA, gene expression, steroidogenesis | Infertility | Jean-Alphonse | Frederic | | CNRS | France |
| Nervous system;Endocrine system;Immune system | Brain, PBMC, SH-SY5Y | Autophagy and mitophagy, inflammation | Neurodegenerative disorders, including Parkinsonism, Alzheimer's Disease, Inflammation | Kan | Beki | | Acibadem University | Turkey |
| Endocrine system | GBM (Brain); Colo-rectal | | | Kinsella | Gemma | | TU Dublin | Ireland |
| Structure-based work | | | | Kolb | Peter | | Philipps-University Marburg | Germany |
| Nervous system;Cardiovascular system;Respiratory system | Any | Any | Parkinson, cancer | Kolocouris | Antonios | | National and Kapodistrian University of Athens, Pharmacy | Greece |
| Nervous system | Brain | cAMP response | Neurodegenerative diseases and addiction | Laasfeld | Tonis | | University of Tartu | Estonia |
| Nervous system;Endocrine system;Blood;Immune system;Gastrointestinal system;Urinary system;Reproductive system | Pituitary gland | Regulation of gene expression | Endocrine or immune systems disorders | Latek | Dorota | | University of Warsaw | Poland |
| Immune system;Reproductive system | | | | Liessmann | Fabian | | Institute for Drug Discovery | Germany |
| Nervous system;Gastrointestinal system | Idem | | All of those related to GHSR-1a | Louet | Maxime | | University of Montpellier | France |
| Nervous system;Cardiovascular system;Immune system;Gastrointestinal system;Respiratory system | Diverse | cAMP, Ca2+, beta-arrestin recruitment, microscopically visible changes | Inflammation, neuroinflammation, infection, cancer | Mueller | Christa | | University of Bonn | Germany |
| Endocrine system;Cardiovascular system | | Beta-arrestin, cAMP | Cancer | Nemec | Katarina | | MDC Berlin | Germany |
| Cardiovascular system | Blood tissue | FRET | Clotting issues | Olgac | Abdurrahman | | Gazi University | Turkey |
| Nervous system;Immune system | Brain, spleen, peripheral blood mononuclear cells, microglia | Autophagy, cellular metabolism (mitochondria), Endosomal trafficking | Alzheimer's disease, Parkinson's disease, inflammation | Oz-Arslan | Devrim | | Acibadem University | Turkey |
| Nervous system | Olfactory system | | | Parnas | Moshe | | Tel Aviv University | Israel |
| Immune system | | Calcium mobilisation, cell proliferation, cancer growth | Cancer | Pfeil | Eva | | Vrije Universiteit Amsterdam | Netherlands |
| Cardiovascular system;Immune system | Vascular cells (endothelial and smooth muscle cells), T cells and other immune cells | | Cardiovascular disease, Immune disease | Rajagopal | Sudarshan | | Duke University School of Medicine | USA |
| Nervous system;Endocrine system;Cardiovascular system;Reproductive system | Mammalian cell cultures, primary cell cultures | Activation/inhibition of cAMP (response to measure for all G proteins (using modified proteins)) | So far no direct studies involved | Rinken | Ago | | University of Tartu | Estonia |
| Nervous system | Brain | | Neurodegeneration | Scarpa | Miriam | | University of Glasgow | United Kingdom |
| Immune system | Dendritic Cells, Keratinocytes, Skin, Lymph Nodes | Migration | Viral infections and Cancer | Schlecht | Geraldine | | University Paris-Saclay | France |
| Immune system | Immune system mouse/human | Cell migration | | Thelen | Marcus | | Institute for Research in Biomedicine, Universita della Svizzera Italiana | Switzerland |
| Normal melanocyte, astrocyte, epithelia,fibroblast vs. Melanoma, glioblastoma, carcinoma, sarcoma. iPSCs | Proliferation, apoptosis, necroptosis, glycolysis, oxidative phosphorylation/mitochondrial respiration, | Cancer | Uldrijan | Stjepan | | Masaryk University | Czech Republic |
| Nervous system;Endocrine system | | | | Vanden Broeck | Jozef | | KU Leuven | Belgium |
| Blood;Immune system | NK cells, T cells, macrophages, dendritic cells; various kinds of tumour cells and tumour cell lines | NK cell or cytotoxic T cell response to cancer, i.e., killing of tumour cells | Cancer | Vanek | Ondrej | | Charles University, Faculty of Science | Czech Republic |
| Nervous system | Astrocytes, neurons, brain tissue, brain/CNS | Metabolism, exocytosis, morphology | Neurodegeneration (brain aging), neuroinflammation, brain edema, epilepsy, ishemia | Vardjan | Nina | | University of Ljubljana, Faculty of Medicine | Slovenia |
| Nervous system;Cardiovascular system | Brain | | Seizures | Vavers | Edijs | | Latvian Institute of Organic Synthesis | Latvia |
| Endocrine system;Reproductive system | | | | Vrecl | Milka | | University of Ljubljana | Slovenia |
| Cardiovascular system;Blood;Immune system | | | | Wingler | Laura | | Duke University | United States |
| Nervous system;Immune system | | Proteostasis | Dementia, Alzheimer's disease, epilepsy | Zerovnik | Eva | | Josef Stefan Institute | Slovenia |
