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Abbreviations and Terminology. |
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1. Historical Background and Introduction. |
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2. The Nature of Constitutive Activity and Inverse Agonism. |
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2.1 Historical Perspective. |
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2.2 Theoretical Basis of Inverse Agonism: Relevance of Receptor Type. |
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2.3 The Interaction of Systems with Ligands. |
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2.4 Inverse Agonism as a Phenotypic Behavior. |
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3. Molecular Mechanisms of GPCR Activation. |
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3.2 GPCR Structure and Ligand Recognition. |
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3.3 Conformational Changes in the GPCR Activation Process. |
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3.4 Conversion to the Active Receptor State Involves Release of Stabilizing Intramolecular Interactions. |
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3.5 Kinetics of Agonist Binding and Receptor Activation. |
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3.6 GPCR Activation in an Oligomeric Context. |
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4. Molecular and Cellular Determinants of GPCR Splice Variant Constitutive Activity. |
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4.2 Constitutive Activation of Second Messenger Production by C-Terminal Splice Variants of GPCRs. |
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4.3 Differential Constitutive Internalization of C-t GPCR Splice Variants. |
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5. Naturally Occurring Constitutively Active Receptors: Physiological and Pharmacological Implications. |
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5.2 Wild-type Interspecies Homologues. |
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5.3 Wild-type Receptor Subtypes within a Given Species. |
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5.4 Wild-type Alternatively Spliced Receptors. |
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5.5 Polymorphisms in GPCRs. |
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5.6 GPCR Mutation-induced Disease. |
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6. The Impact of G Proteins on Constitutive GPCR Activity. |
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6.2 The Contribution of G proteins to Constitutive Activity. |
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6.3 GPCR–G Protein Fusion Proteins. |
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7. (Patho)physiological and Therapeutic Relevance of Constitutive Activity and Inverse Agonism at G Protein-Coupled Receptors. |
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7.2 Physiological Relevance of Constitutive Activity of GPCRs. |
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7.3 Constitutive Activity of GPCRs and Pathophysiology of Disease. |
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7.4 Physiological Relevance of Inverse Agonists. |
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7.5 Inverse Agonists as Drugs. |
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8. Methodological Approaches. |
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8.2 Analysis of Constitutive GPCR Activity in Membranes and Intact Cells. |
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8.3 Measurement of Constitutive Activity of GPCRs in Intact Cells. |
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II: Constitutive Activity of Selected GPCR Systems. |
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9. Constitutive Activity of b-Adrenoceptors: Analysis in Membrane Systems. |
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9.2 Analysis of βAR/Gs Protein Coupling in Membranes. |
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9.3 Development of the Concept that βARs are Constitutively Active. |
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9.4 Probing Models of GPCR Activation with β2ARwt and β2ARCAM with Inverse Agonists. |
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9.5 Probing Models of GPCR Activation with β2ARwt and β2ARCAM and with Partial and Full Agonists. |
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9.6 Probing Models of GPCR Activation with β2ARwt and Purine Nucleotides. |
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9.7 Constitutive Activity of the β2AR Coupled to Various GΑs Proteins. |
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9.8 Probing Models of GPCR Activation with β2AR Coupled to Various Classes of G proteins. |
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9.9 Comparison of the Constitutive Activities of the β1AR and the β2AR. |
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10. Constitutive Activity of Β-Adrenoceptors: Analysis by Physiological Methods. |
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10.2 Constitutive Activity and Inverse Agonism: Definition and Detection. |
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10.5 Homo- and Heterodimerization of β1- and β2ARs. |
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11. Constitutive Activity at the α1-Adrenoceptors: Past and Future Implications. |
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11.2 Theoretical and Experimental Approaches for Study of Constitutive GPCR Activity. |
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11.3 Constitutively Activating Mutations of the α1AR Subtypes. |
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11.4 A Putative Model of Receptor Activation for the α1BAR. |
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11.5 Constitutive Activity of Wild-type α1ARs and Inverse Agonism. |
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11.6 Receptor Regulation and Constitutive Activity of the α1ARs. |
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12. Constitutive Activity of Muscarinic Acetylcholine Receptors: Implications for Receptor Activation and Physiological Relevance. |
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12.2 Constitutive Activity – Native Systems. |
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12.3 Constitutive Activity – Recombinant Systems. |
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12.4 Constitutive Activation by G Proteins. |
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12.5 Structure–Function Analysis of Receptor Activation. |
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12.6 Structure–Function Model for Activation. |
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13. Constitutively Active Histamine Receptors. |
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13.2 The Histamine Receptors. |
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13.3 Assay Systems for Detection of Constitutive Activity of Histamine Receptors. |
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14. Constitutively Active Serotonin Receptors. |
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14.2 5-HT1A Receptor (5-HT1AR). |
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14.3 5-HT1B and 5-HT1D Receptors (5-HT1BR and 5-HT1DR). |
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14.4 5-HT2A Receptor (5-HT2AR). |
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14.5 5-HT2C Receptor (5-HT2CR). |
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15. Virally Encoded Constitutively Active Chemokine Receptors. |
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15.2 The Human Cytomegalovirus-encoded Chemokine Receptor Homologue pUS28. |
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15.3 The Human Kaposi’s Sarcoma Virus-encoded Chemokine Receptor KSHV-GPCR. |
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