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Moore GJ, Ridway H, Gadanec LK, Apostolopoulos V, Zulli A, Swiderski J, Kelaidonis K, Vidali VP, Matsoukas MT, Chasapis CT, Matsoukas JM. Structural Features Influencing the Bioactive Conformation of Angiotensin II and Angiotensin A: Relationship between Receptor Desensitization, Addiction, and the Blood-Brain Barrier. Int J Mol Sci 2024; 25:5779. [PMID: 38891966 PMCID: PMC11171751 DOI: 10.3390/ijms25115779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/04/2024] [Accepted: 05/08/2024] [Indexed: 06/21/2024] Open
Abstract
The N-terminal portion of the octapeptide angiotensin II (DRVYIHPF; AngII), a vasopressor peptide that favorably binds to, and activates, AngII type 1 receptor (AT1R), has an important role in maintaining bioactive conformation. It involves all three charged groups, namely (i) the N-terminal amino group cation, (ii) the Asp sidechain anion and (iii) the Arg guanidino cation. Neutralization of any one of these three charged groups results in a substantial reduction (<5%) in bioactivity, implicating a specialized function for this cluster. In contrast, angiotensin A (ARVYIHPF; AngA) has reduced bioactivity at AT1R; however, replacement of Asp in AngII with sarcosine (N-methyl-glycine) not only restores bioactivity but increases the activity of agonist, antagonist, and inverse agonist analogues. A bend produced at the N-terminus by the introduction of the secondary amino acid sarcosine is thought to realign the functional groups that chaperone the C-terminal portion of AngII, allowing transfer of the negative charge originating at the C-terminus to be transferred to the Tyr hydroxyl-forming tyrosinate anion, which is required to activate the receptor and desensitizes the receptor (tachyphylaxis). Peptide (sarilesin) and nonpeptide (sartans) moieties, which are long-acting inverse agonists, appear to desensitize the receptor by a mechanism analogous to tachyphylaxis. Sartans/bisartans were found to bind to alpha adrenergic receptors resulting in structure-dependent desensitization or resensitization. These considerations have provided information on the mechanisms of receptor desensitization/tolerance and insights into possible avenues for treating addiction. In this regard sartans, which appear to cross the blood-brain barrier more readily than bisartans, are the preferred drug candidates.
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Affiliation(s)
- Graham J. Moore
- Pepmetics Inc., 772 Murphy Place, Victoria, BC V8Y 3H4, Canada;
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Harry Ridway
- Institute for Sustainable Industries and Liveable Cities, Victoria University, Melbourne, VIC 8001, Australia;
| | - Laura Kate Gadanec
- Institute for Health and Sport, Immunology and Translational Research, Victoria University, Melbourne, VIC 3030, Australia; (L.K.G.); (V.A.); (A.Z.); (J.S.)
| | - Vasso Apostolopoulos
- Institute for Health and Sport, Immunology and Translational Research, Victoria University, Melbourne, VIC 3030, Australia; (L.K.G.); (V.A.); (A.Z.); (J.S.)
- Immunology Program, Australian Institute for Musculoskeletal Science (AIMSS), Melbourne, VIC 3021, Australia
| | - Anthony Zulli
- Institute for Health and Sport, Immunology and Translational Research, Victoria University, Melbourne, VIC 3030, Australia; (L.K.G.); (V.A.); (A.Z.); (J.S.)
| | - Jordan Swiderski
- Institute for Health and Sport, Immunology and Translational Research, Victoria University, Melbourne, VIC 3030, Australia; (L.K.G.); (V.A.); (A.Z.); (J.S.)
| | | | - Veroniki P. Vidali
- Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece;
| | | | - Christos T. Chasapis
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece;
| | - John M. Matsoukas
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
- Institute for Health and Sport, Immunology and Translational Research, Victoria University, Melbourne, VIC 3030, Australia; (L.K.G.); (V.A.); (A.Z.); (J.S.)
- NewDrug/NeoFar PC, Patras Science Park, 26504 Patras, Greece;
- Department of Chemistry, University of Patras, 26504 Patras, Greece
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Rothlin RP, Pelorosso F, Duarte M, Nicolosi L, Fernandez Criado I, Salgado MV, Vetulli H. RAAS inhibitors in COVID-19: Not all are created equal. Telmisartan is the one. Rev Port Cardiol 2024; 43:219-220. [PMID: 37940073 DOI: 10.1016/j.repc.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 11/10/2023] Open
Affiliation(s)
- Rodolfo P Rothlin
- Sociedad Argentina de Farmacología Clínica, Asociación Médica Argentina, Argentina.
| | - Facundo Pelorosso
- Servicio de Anatomía Patológica, Hospital de Alta Complejidad El Calafate SAMIC, Argentina
| | - Mariano Duarte
- Laboratorio de Hipertensión, División de Cardiología, Hospital de Clínicas «José de San Martín», Facultad de Medicina, Universidad de Buenos Aires, Argentina; Segunda Cátedra de Fisiología, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Liliana Nicolosi
- División de Cardiología, Hospital Español de Buenos Aires, Argentina
| | - Ignacio Fernandez Criado
- Sección de Tecnología Educativa e Informática Médica, Hospital de Clínicas «José de San Martín», Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - María Victoria Salgado
- Centro de Estudios de Estado y Sociedad, Ciudad Autónoma de Buenos Aires, Argentina; Servicio de Medicina Familiar, Hospital de Alta Complejidad El Calafate SAMIC, Argentina
| | - Héctor Vetulli
- Servicio de Electrofisiología Cardíaca, Arritmias y Marcapasos, Sanatorio Otamendi y Miroli, Ciudad Autónoma de Buenos Aires, Argentina
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Mekary W, Fares S, Abdulhai F, Massoud G, Refaat M, Mericskay M, Booz GW, Zouein FA. Assessing the outcomes of prescribing angiotensin converting enzyme inhibitors and angiotensin receptor blockers for COVID-19 patients. Heliyon 2023; 9:e19373. [PMID: 37662725 PMCID: PMC10472216 DOI: 10.1016/j.heliyon.2023.e19373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/16/2023] [Accepted: 08/21/2023] [Indexed: 09/05/2023] Open
Abstract
Background Patients with heart failure were affected severely by COVID-19. Most heart failure patients are on guideline directed medical therapy, which includes ACE inhibitors (ACEI) and ARBs. These medications were controversial at the beginning of the pandemic due to their interplay with the receptor that SARS-CoV-2 binds in the lungs. We investigated the effect that ACEI and ARB had on patients with hypertension, coronary artery disease, and heart failure. Methods We recruited 176 patients with COVID-19 infection and cardiovascular comorbidities at the American University of Beirut Medical Center in Lebanon. Of these, 110 patients were taking ACEI or ARB and 66 were not. We collected clinical data and looked at inflammatory markers such as CRP and IL-6 and cardiac markers such as troponin T. We also reported the incidence of ARDS, sepsis, and death of each patient, and compared the 2 groups. Results We found that patients taking ACEI and ARB had a statistically significant decrease in levels of troponin T, IL-6, and CRP compared to patients not taking these medications (p < 0.05). We found no difference in rates of ARDS, sepsis, or death between the 2 groups. Conclusion Inhibition of the renin-angiotensin-aldosterone-system had no effect on the mortality of patients with COVID-19 and on their overall disease progression. However, it may be beneficial not to stop these medications as they decrease inflammation in the body and the levels of troponin, which are related to increased stress on the heart.
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Affiliation(s)
- Wissam Mekary
- Department of Pharmacology and Toxicology, American University of Beirut Medical Center, Faculty of Medicine, Beirut, Lebanon
- The Cardiovascular Renal And Metabolic Diseases Research Center of Excellence, American University of Beirut Medical Center, Faculty of Medicine, Beirut, Lebanon
| | - Souha Fares
- Hariri School of Nursing, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Farah Abdulhai
- Department of Internal Medicine, Cardiovascular Medicine/Cardiac Electrophysiology, American University of Beirut Faculty of Medicine and Medical Center, Beirut, Lebanon
- Clinical Research Institute, American University of Beirut Medical Center, Beirut, Lebanon
| | - Gaelle Massoud
- Department of Pharmacology and Toxicology, American University of Beirut Medical Center, Faculty of Medicine, Beirut, Lebanon
- The Cardiovascular Renal And Metabolic Diseases Research Center of Excellence, American University of Beirut Medical Center, Faculty of Medicine, Beirut, Lebanon
- Department of Gynecology and Obstetrics, Division of Reproductive Sciences & Women's Health Research, Johns Hopkins Medicine, Baltimore, USA
| | - Marwan Refaat
- Department of Internal Medicine, Cardiovascular Medicine/Cardiac Electrophysiology, American University of Beirut Faculty of Medicine and Medical Center, Beirut, Lebanon
- Clinical Research Institute, American University of Beirut Medical Center, Beirut, Lebanon
| | - Mathias Mericskay
- Department of Signaling and Cardiovascular Pathophysiology, UMR-S 1180, Inserm, Université Paris-Saclay, France
| | - George W. Booz
- Department of Pharmacology and Toxicology, School of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
| | - Fouad A. Zouein
- Department of Pharmacology and Toxicology, American University of Beirut Medical Center, Faculty of Medicine, Beirut, Lebanon
- The Cardiovascular Renal And Metabolic Diseases Research Center of Excellence, American University of Beirut Medical Center, Faculty of Medicine, Beirut, Lebanon
- Department of Signaling and Cardiovascular Pathophysiology, UMR-S 1180, Inserm, Université Paris-Saclay, France
- Department of Pharmacology and Toxicology, School of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
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