Biased perspectives on formyl peptide receptors. 2019

Carsten Alexander Raabe, and Jieny Gröper, and Ursula Rescher
Institute of Medical Biochemistry, Center for Molecular Biology of Inflammation, University of Muenster, Von-Esmarch-Str. 56, D-48149 Muenster, Germany; Institute of Experimental Pathology, Center for Molecular Biology of Inflammation, University of Muenster, Von-Esmarch-Str. 56, D-48149 Muenster, Germany; Brandenburg Medical School (MHB), Fehrbelliner Str. 38, D-16816 Neuruppin, Germany.

The innate immune system is the first line of defense against pathogenic threats. For the early pathogen recognition and activation of cell protective mechanisms, germline-encoded pattern recognition receptors (PRRs) detect characteristic and evolutionary conserved pathogen-associated molecular patterns (PAMPs). PRRs are therefore key elements in the innate immune response; in addition, they sense danger-associated molecular patterns (DAMPs) that are released by host cell molecules under pathophysiological conditions. Formyl peptide receptors (FPRs) are G-protein-coupled PRRs that respond to a surprisingly broad range of ligands, derived from both pathogens and host cells. Here, we exemplary discuss ligands in order to illustrate the wide pathophysiological relevance of the FPR signaling axis in case of e.g., chronic inflammations and to underscore its potential therapeutic value in the light of "biased agonism", a modern concept of GPCR (G-protein coupled receptors) activation. These novel insights into the GPCR receptor biochemistry will hopefully (re)stimulate FPR-related research and lead to novel strategies for the urgently needed development of drugs with pharmacologically advantageous characteristics.

UI MeSH Term Description Entries
D007107 Immune System The body's defense mechanism against foreign organisms or substances and deviant native cells. It includes the humoral immune response and the cell-mediated response and consists of a complex of interrelated cellular, molecular, and genetic components. Immune Systems,System, Immune,Systems, Immune
D007113 Immunity, Innate The capacity of a normal organism to remain unaffected by microorganisms and their toxins. It results from the presence of naturally occurring ANTI-INFECTIVE AGENTS, constitutional factors such as BODY TEMPERATURE and immediate acting immune cells such as NATURAL KILLER CELLS. Immunity, Native,Immunity, Natural,Immunity, Non-Specific,Resistance, Natural,Innate Immune Response,Innate Immunity,Immune Response, Innate,Immune Responses, Innate,Immunity, Non Specific,Innate Immune Responses,Native Immunity,Natural Immunity,Natural Resistance,Non-Specific Immunity
D007249 Inflammation A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function. Innate Inflammatory Response,Inflammations,Inflammatory Response, Innate,Innate Inflammatory Responses
D008024 Ligands A molecule that binds to another molecule, used especially to refer to a small molecule that binds specifically to a larger molecule, e.g., an antigen binding to an antibody, a hormone or neurotransmitter binding to a receptor, or a substrate or allosteric effector binding to an enzyme. Ligands are also molecules that donate or accept a pair of electrons to form a coordinate covalent bond with the central metal atom of a coordination complex. (From Dorland, 27th ed) Ligand
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000067531 Alarmins A structurally diverse group of endogenous molecules that are multifunctional, having physiological functions inside the cell, but when released from dying cells or from cells under stress or certain immune cells, they function to activate INNATE IMMUNITY. Uncontrolled and excessive release of alarmins may contribute to INFLAMMATION; CARCINOGENESIS, and NEOPLASM METASTASIS. Alarmins are also critical for heart and nerve tissue homeostasis. Alarmin,Alarmin Proteins,Damage-Associated Molecular Pattern Molecules,Danger-Associated Molecular Pattern Molecules,Damage Associated Molecular Pattern Molecules,Danger Associated Molecular Pattern Molecules
D000069452 Pathogen-Associated Molecular Pattern Molecules Pathogens' molecules with specific sequence patterns that are recognized by PATTERN RECOGNITION RECEPTORS. They include microbial DNA, double-stranded RNA, surface glycoproteins, lipopolysaccharides, peptidoglycans, and lipoteichoic acid. PAMP,Pathogen-Associated Molecular Pattern,Molecules, Pathogen-Associated Molecular Pattern,PAMPs,Pathogen-Associated Molecular Patterns,Pathogen Associated Molecular Pattern,Pathogen Associated Molecular Pattern Molecules,Pathogen Associated Molecular Patterns
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D044042 Receptors, Formyl Peptide A family of G-protein-coupled receptors that was originally identified by its ability to bind N-formyl peptides such as N-FORMYLMETHIONINE LEUCYL-PHENYLALANINE. Since N-formyl peptides are found in MITOCHONDRIA and BACTERIA, this class of receptors is believed to play a role in mediating cellular responses to cellular damage and bacterial invasion. However, non-formylated peptide ligands have also been found for this receptor class. Chemotactic Peptide Receptor,Chemoattractant Receptor,F-Chemotactic Peptide Receptor,FMLP Receptor,Formyl Peptide Receptor,N-Formylmethionyl Peptide Receptor,N-formyl Hexapeptide Receptor,Receptor, Chemotactic Peptide,fMet-Leu-Phe Receptor,F Chemotactic Peptide Receptor,Formyl Peptide Receptors,Hexapeptide Receptor, N-formyl,N Formylmethionyl Peptide Receptor,N formyl Hexapeptide Receptor,Peptide Receptor, Chemotactic,Peptide Receptor, N-Formylmethionyl,Peptide Receptors, Formyl,Receptor, Chemoattractant,Receptor, F-Chemotactic Peptide,Receptor, FMLP,Receptor, Formyl Peptide,Receptor, N-Formylmethionyl Peptide,Receptor, N-formyl Hexapeptide,Receptor, fMet-Leu-Phe,fMet Leu Phe Receptor

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