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Lungs --- Oxygen --- Carbon dioxide --- Acid-base imbalances --- Respiratory insufficiency --- Respiratory Tract Diseases --- Lung --- Diseases --- Complications --- Physiological transport --- complications --- physiopathology --- -Lungs --- -Oxygen --- -Respiratory insufficiency --- -Depression, Respiratory --- Depression, Ventilatory --- Failure, Respiratory --- Insufficiency, Respiratory --- Pulmonary insufficiency --- Respiratory depression --- Respiratory failure --- Ventilatory depression --- Chalcogens --- Nonmetals --- Photosynthetic oxygen evolution --- Cardiopulmonary system --- Chest --- Respiratory organs --- Carbonic acid gas --- Carbonic anhydride --- Carbon compounds --- Oxides --- Acid-base disorders --- Acid-base imbalance --- Imbalances, Acid-base --- Body fluid disorders --- complications. --- physiopathology. --- -Complications --- Acid-base imbalances. --- Respiratory tract diseases --- Physiological transport. --- Complications. --- Physiopathology. --- -complications. --- Depression, Respiratory --- Delivery of oxygen (Physiology) --- Oxygen delivery (Physiology) --- Oxygen transport (Physiology) --- Carbon dioxide transport (Physiology) --- Diseases&delete& --- Lung. --- Lungs - Diseases - Complications --- Oxygen - Physiological transport --- Carbon dioxide - Physiological transport --- Respiratory insufficiency - Complications --- Respiratory Tract Diseases - complications --- Lung - physiopathology

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The interest in opioids such as morphine, the prototypical opioid ligand, has been maintained through the years. The identification of endogenous opioids and their receptors (mu, delta, kappa, and nociceptin), molecular cloning, and the elucidation of the crystal structures of opioid receptors represent key milestones in opioid research. The opioid system modulates numerous pharmacological responses, with therapeutic (i.e., analgesia) and detrimental side effects (i.e., addiction). The medical use and misuse of opioids have dramatically increased, leading to the 21st century opioid crisis. This book presents recent developments in opioid drug discovery, specifically in the medicinal chemistry and pharmacology of new ligands targeting the opioid receptors as effective and safe therapeutics for human diseases. Furthermore, it draws a special attention to advancing concepts and strategies in opioid drug discovery to mitigate opioid liabilities. The diversity among the discussed topics is a testimony to the complexity of the opioid system, which results from the expression, regulation, and functional role of ligands and receptors. The array of multidisciplinary research areas illustrates the rapidly developing basic research and translational activities in opioid drug discovery. This book will serve as a useful reference while also stimulating continued research in the chemistry and pharmacology of opioids and their receptors, with the prospect of developing improved therapies for human diseases, but also improving health and quality of life in general.

opioid receptors --- neurokinin-1 receptor --- peptide synthesis --- receptor binding studies --- functional assay --- writhing test --- tolerance --- Leu-enkephalin --- beta-arrestin --- mu opioid receptor --- delta opioid receptor --- biased signaling --- DADLE --- ischemia --- plasma stability --- morphinan --- BNTX --- δ opioid receptor antagonist --- 1H-NMR experiments --- mechanism elucidation --- peripheral antinociception --- 14-methoxycodeine-6-O-sulfate --- codeine-6-O-sulfate --- opioid peptides and peptidomimetics --- DAMGO --- DALDA --- [Dmt1]DALDA --- KGOP01 --- binding --- molecular docking --- structure-activity relationships --- β2-amino acids --- β2-Homo-amino acids --- µ-opioid receptor --- opioid peptides --- TAPP --- racemic synthesis of β2-amino acids --- peripheral µ-opioid receptors --- analgesia --- peripheral analgesic tolerance --- dysbiosis --- opioid --- bifunctional ligands --- (−)-N-phenethylnorhydromorphone analogs --- [35S]GTPgammaS assay --- forskolin-induced cAMP accumulation assays --- β-arrestin recruitment assays --- MOR and DOR agonists --- respiratory depression --- bias factor --- molecular modeling &amp --- simulation --- δ opioid receptor --- NTI derivative --- sulfonamide --- inverse agonist --- neutral antagonist --- agonist --- opioids --- mu receptor --- opioid side effects --- biased agonism --- partial agonism --- zerumbone --- chronic constriction injury (CCI) --- allodynia --- hyperalgesia --- potassium channels --- over-the-counter drugs --- misuse --- abuse --- opioid drugs --- pharmacology --- codeine --- dihydrocodeine --- loperamide --- opioid peptide --- macrocyclic tetrapeptide --- multifunctional ligands --- kappa opioid receptor --- analgesics --- opioid liabilities --- μ opioid receptor --- receptor model --- biased ligands --- dependence --- pain therapy --- neonatal opioid withdrawal syndrome --- naltrexone --- 6β-naltrexol --- buprenorphine --- G-protein bias --- arrestin recruitment --- respiration --- mitragynine --- heteromer --- internalization --- primary hippocampal culture --- lysosomes --- µ opioid receptor --- molecular dynamics --- docking --- interaction fingerprints --- biased agonists --- SR-17018 --- PZM21 --- morphine --- fentanyl --- diphenethylamines --- design and synthesis --- structure–activity relationships --- partial agonist --- biased agonist --- antagonist --- binding affinity --- selectivity --- n/a