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Rodrigues AF, Domenig O, Poglitsch M, Bader M, Danser AJ. Angiotensin-(1-12): Does It Exist? A Critical Evaluation in Humans, Rats, and Mice. Hypertension 2024; 81:1776-1784. [PMID: 38716648 PMCID: PMC11251504 DOI: 10.1161/hypertensionaha.124.22856] [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: 02/05/2024] [Accepted: 04/22/2024] [Indexed: 07/18/2024]
Abstract
BACKGROUND Angiotensin-(1-12), measured by a self-developed, polyclonal antibody-based radioimmunoassay, has been suggested to act as an alternative precursor of angiotensin II. A more reliable detection method would be liquid chromatography-tandem mass spectrometry. METHODS We set up the quantification of human and murine angiotensin-(1-12) by liquid chromatography-tandem mass spectrometry and then used this method to measure angiotensin-(1-12) in human, rat, and mouse blood samples, as well as in mouse brain, mouse kidney, and rat heart. We also verified ex vivo angiotensin-(1-12) generation and metabolism in human blood samples incubated at 37 °C. RESULTS Stabilization of blood in guanidine hydrochloride was chosen for sample collection since this allowed full recovery of spiked angiotensin-(1-12). Angiotensin-(1-12) was undetectable in human blood samples when incubating nonstabilized plasma at 37 °C, while angiotensin-(1-12) added to nonstabilized human plasma disappeared within 10 minutes. Stabilized human blood samples contained angiotensin II, while angiotensin-(1-12) was undetectable. Blood, hearts, and kidneys, but not brains, of wild-type mice and rats contained detectable levels of angiotensin II, while angiotensin-(1-12) was undetectable. In renin knockout mice, all angiotensins, including angiotensin-(1-12), were undetectable at all sites, despite a 50% rise in angiotensinogen. Angiotensin-(1-12) metabolism in human blood plasma was not affected by renin inhibition. Yet, blockade of angiotensin-converting enzyme and aminopeptidase A, but not of chymase, neutral endopeptidase, or prolyl oligopeptidase, prolonged the half-life of angiotensin-(1-12), and angiotensin-converting enzyme inhibition prevented the formation of angiotensin II. CONCLUSIONS We were unable to detect intact angiotensin-(1-12) in humans, rats, and mice, either in blood or tissue, suggesting that this metabolite is an unlikely source of endogenous angiotensins.
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Affiliation(s)
- André F. Rodrigues
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (A.F.R., M.B.)
- German Center for Cardiovascular Research, Berlin, Germany (A.F.R., M.B.)
| | | | | | - Michael Bader
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (A.F.R., M.B.)
- German Center for Cardiovascular Research, Berlin, Germany (A.F.R., M.B.)
- Charité Universitätsmedizin Berlin, Germany (M.B.)
- Institute for Biology, University of Lübeck, Germany (M.B.)
| | - A.H. Jan Danser
- Division of Pharmacology and Vascular Medicine, Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, The Netherlands (A.H.J.D.)
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Ramdin S, Naicker T, Baijnath S, Govender N. Is renal dysfunction amplified in an arginine vasopressin induced rat model of preeclampsia? Reprod Biol 2024; 24:100910. [PMID: 38851025 DOI: 10.1016/j.repbio.2024.100910] [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: 09/19/2023] [Revised: 04/27/2024] [Accepted: 05/25/2024] [Indexed: 06/10/2024]
Abstract
Renal dysfunction is important in preeclampsia (PE) pathophysiology and has not been fully explored in the arginine vasopressin (AVP) rat model of PE. This study aimed to determine kidney toxicity associated with this model. Female Sprague Dawley rats (n = 24) were subcutaneously infused with AVP or saline for 18 days. Urine samples (GD8, 14 and 18) were used to determine the levels of albumin, VEGF-A, clusterin, NGAL/Lipocalin-2, KIM-1, cystatin C, TIMP-1, β2M and OPN via Multiplex ELISAs. Albumin, and NGAL/lipocalin-2 were significantly elevated in the PAVP vs PS group on GD14 and GD18 (p < 0.001) respectively. VEGF-A significantly decreased in the pregnant vs non-pregnant groups on GD14 and 18 (p < 0.001). Clusterin (p < 0.001) and OPN (p < 0.05) were significantly higher in the PAVP vs PS group on GD18. Cystatin C and KIM-1 are significantly upregulated in the PAVP vs PS groups throughout gestation (p < 0.05). β2M is significantly elevated in the PAVP vs PS group on GD14 and 18 (p < 0.05). AVP elevated the urinary levels of the kidney injury biomarkers and replicated the renal dysfunction associated with PE development. Our findings confirm the potential applications of this model in studying the mechanisms underlying renal damage in PE.
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Affiliation(s)
- Sapna Ramdin
- Department of Basic Medical Sciences, Faculty of Health Sciences, Durban University of Technology, Durban, South Africa
| | - Thajasvarie Naicker
- Optics and Imaging Centre, Doris Duke Medical Research Institute, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Sooraj Baijnath
- Integrated Molecular Physiology Research Initiative, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Nalini Govender
- Department of Basic Medical Sciences, Faculty of Health Sciences, Durban University of Technology, Durban, South Africa.
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Fan M, Liu W, Zhao L, Nie L, Wang Y. Engineering nanosystems for transdermal delivery of antihypertensive drugs. Pharm Dev Technol 2024; 29:265-279. [PMID: 38416123 DOI: 10.1080/10837450.2024.2324981] [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: 08/17/2023] [Accepted: 02/26/2024] [Indexed: 02/29/2024]
Abstract
To control hypertension, long-term continuous antihypertensive therapeutics are required and five classes of antihypertensive drugs are frequently involved, including diuretics, β-blockers, calcium channel blockers, angiotensin II receptor blockers, and angiotensin-converting enzyme inhibitors. Although with demonstrated clinical utility, there is still room for the improvement of many antihypertensive drugs in oral tablet or capsule dosage form, in terms of reducing systemic side effects and first-pass hepatic drug uptake. Meanwhile, nanocarrier-mediated transdermal drug delivery systems have emerged as a powerful tool for various disease treatments. With benefits such as promoting patient compliance for long-time administration, enhancing skin permeability, and reducing systemic side effects, these systems are reasonably investigated and developed for the transdermal delivery of multiple antihypertensive drugs. This review aims to summarize the literature relating to nanosystem-based transdermal antihypertensive drug delivery and update recent advances in this field, as well as briefly discuss the challenges and prospects of engineering transdermal delivery nanosystems for hypertension treatment.
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Affiliation(s)
- Mingliang Fan
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Wengang Liu
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Liangfeng Zhao
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Lirong Nie
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Yu Wang
- Department of Cardiology, Shidong Hospital, Yangpu District, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, China
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Braga TV, Mervaala E, Santos R, Bader M. Cardiovascular Peptide Hormones - Special edition. Peptides 2023:171062. [PMID: 37422013 DOI: 10.1016/j.peptides.2023.171062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/10/2023]
Affiliation(s)
- Thiago Verano Braga
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Eero Mervaala
- Department of Pharmacology, Faculty of Medicine, University of Helsinki, Finland
| | - Robson Santos
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Michael Bader
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany; Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; University of Lübeck, Institute for Biology, Lübeck, Germany.
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Sun X, Cao J, Chen Z, Liu Y, VonCannon JL, Cheng HJ, Ferrario CM, Cheng CP. Increased CaMKII activation and contrast changes of cardiac β1-and β3-Adrenergic signaling pathways in a humanized angiotensinogen model of hypertension. Heliyon 2023; 9:e17851. [PMID: 37456012 PMCID: PMC10344767 DOI: 10.1016/j.heliyon.2023.e17851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/26/2023] [Accepted: 06/29/2023] [Indexed: 07/18/2023] Open
Abstract
Aims Upregulation of Ca2+/calmodulin-dependent protein kinase II (CaMKII) contributes to the pathogenesis of cardiovascular disease, including hypertension. Transgenic rats expressing the human angiotensinogen gene [TGR (hAGT)L1623] are a new novel humanized model of hypertension that associates with declines in cardiac contractile function and β-adrenergic receptor (AR) reserve. The molecular mechanisms are unclear. We tested the hypothesis that in TGR (hAGT)L1623 rats, left ventricular (LV) myocyte CaMKIIδ and β3-AR are upregulated, but β1-AR is down-regulated, which are important causes of cardiac dysfunction and β-AR desensitization. Main methods We compared LV myocyte CaMKIIδ, CaMKIIδ phosphorylation (at Thr287) (pCaMKIIδ), and β1-and β3-AR expressions and determined myocyte functional and [Ca2+]I transient ([Ca2+]iT) responses to β-AR stimulation with and without pretreatment of myocytes using an inhibitor of CaMKII, KN-93 (10-6 M, 30 min) in male Sprague Dawley (SD; N = 10) control and TGR (hAGT)L1623 (N = 10) adult rats. Key findings Hypertension in TGR (hAGT)L1623 rats was accompanied by significantly increased LV myocyte β3-AR protein levels and reduced β1-AR protein levels. CaMKIIδ phosphorylation (at Thr287), pCaMKIIδ was significantly increased by 35%. These changes were followed by significantly reduced basal cell contraction (dL/dtmax), relaxation (dR/dtmax), and [Ca2+]iT. Isoproterenol (10-8 M) produced significantly smaller increases in dL/dtmax, dR/dtmax, and [Ca2+]iT. Moreover, only in TGR (hAGT)L1623 rats, pretreatment of LV myocytes with KN-93 (10-6 M, 30 min) fully restored normal basal and isoproterenol-stimulated myocyte contraction, relaxation, and [Ca2+]iT. Significance LV myocyte CaMKIIδ overactivation with associated contrast changes in β3-AR and β1-AR may be the key molecular mechanism for the abnormal contractile phenotype and β-AR desensitization in this humanized model of hypertension.
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Affiliation(s)
- Xiaoqiang Sun
- Department of Cardiology, Tianjin First Central Hospital, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Department of Internal Medicine, Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Jing Cao
- Department of Critical Care Medicine, First Hospital of Shanxi Medical University, Taiyuan, China
- Department of Internal Medicine, Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Zhe Chen
- Department of Internal Medicine, Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
- Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yixi Liu
- Department of Internal Medicine, Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
- Department of Cardiology, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jessica L. VonCannon
- Department of Surgery, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Heng Jie Cheng
- Department of Internal Medicine, Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Carlos M. Ferrario
- Department of Surgery, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Che Ping Cheng
- Department of Internal Medicine, Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
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Ahmad S, Wright KN, VonCannon JL, Ferrario CM, Ola MS, Choudhary M, Malek G, Gustafson JR, Sappington RM. Internalization of Angiotensin-(1-12) in Adult Retinal Pigment Epithelial-19 Cells. J Ocul Pharmacol Ther 2023; 39:290-299. [PMID: 36944130 PMCID: PMC10178934 DOI: 10.1089/jop.2022.0139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 02/12/2023] [Indexed: 03/23/2023] Open
Abstract
Purpose: Angiotensin-(1-12) [Ang-(1-12)] serves as a primary substrate to generate angiotensin II (Ang II) by angiotensin-converting enzyme and/or chymase suggests it may be an unrecognized source of Ang II-mediated microvascular complication in hypertension-mediated retinopathy. We investigated Ang-(1-12) expression and internalization in adult retinal pigment epithelial-19 (ARPE-19) cultured cells. We performed the internalization of Ang-(1-12) in ARPE-19 cells in the presence of a highly specific monoclonal antibody (mAb) developed against the C-terminal end of the Ang-(1-12) sequence. Methods: All experiments were performed in confluent ARPE-19 cells (passage 28-35). We employed high-performance liquid chromatography to purify radiolabeled, 125I-Ang-(1-12) and immuno-neutralization with Ang-(1-12) mAb to demonstrate Ang-(1-12)'s internalization in ARPE-19 cells. Internalization was also demonstrated by immunofluorescence (IF) method. Results: These procedures revealed internalization of an intact 125I-Ang-(1-12) in ARPE-19 cells. A significant reduction (∼53%, P < 0.0001) in 125I-Ang-(1-12) internalization was detected in APRE-19 cells in the presence of the mAb. IF staining experiments further confirms internalization of Ang-(1-12) into the cells from the extracellular culture medium. No endogenous expression was detected in the ARPE-19 cells. An increased intensity of IF staining was detected in cells exposed to 1.0 μM Ang-(1-12) compared with 0.1 μM. Furthermore, we found hydrolysis of Ang-(1-12) into Ang II by ARPE-19 cells' plasma membranes. Conclusions: Intact Ang-(1-12) peptide is internalized from the extracellular spaces in ARPE-19 cells and metabolized into Ang II. The finding that a selective mAb blocks cellular internalization of Ang-(1-12) suggests alternate therapeutic approaches to prevent/reduce the RPE cells Ang II burden.
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Affiliation(s)
- Sarfaraz Ahmad
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Kendra N. Wright
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Jessica L. VonCannon
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Carlos M. Ferrario
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Mohammad S. Ola
- Department of Biochemistry, King Saud University, Riyadh, Saudi Arabia
| | - Mayur Choudhary
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Goldis Malek
- Department of Ophthalmology, Duke University School of Medicine, Durham, North Carolina, USA
| | - Jenna R. Gustafson
- Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Rebecca M. Sappington
- Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
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Li C, Hao J, Zheng Y, Wang C, Yang J, Wang W, Zhang K, Shao C, Hui W, Wang J, Li W, Tang YD. The changing landscape of drug clinical trials on cardiometabolic diseases in China, 2009-2021. Diabetol Metab Syndr 2023; 15:66. [PMID: 37005689 PMCID: PMC10067219 DOI: 10.1186/s13098-023-01043-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/25/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND Cardiometabolic disease is a clinical syndrome characterized by multiple metabolic disorders, with atherosclerosis as the core and cardiovascular and cerebrovascular events as the outcome. Drug research and development (R&D) in cardiometabolic diseases has grown rapidly worldwide. However, the development of cardiometabolic drug clinical trials in China remains unclear. This study aims to depict the changing landscape of drug clinical trials for cardiometabolic diseases in China during 2009-2021. METHODS The detailed information of drug trials on cardiometabolic diseases registered in the National Medical Products Administration (NMPA) Registration and Information Disclosure Platform was collected between January 1, 2009, and July 1, 2021. The landscape of cardiometabolic drug clinical trials was analyzed by the characteristics, time trends, indications, pharmacological mechanisms, and geographical distribution. RESULTS A total of 2466 drug clinical trials on cardiometabolic diseases were extracted and analyzed. The annual number of drug trials increased rapidly in the past twelve years. Among all the trials, the bioequivalence trials (1428; 58.3%) accounted for the largest proportion, followed by phase I (555; 22.5%), phase III (278; 11.3%), phase II (169; 6.9%), and phase IV (26; 1.1%). Of 2466 trials, 2133 (86.5%) trials were monomer drugs, only 236 (9.6%) trials were polypills and 97 (3.9%) were traditional Chinese medicine (TCM) compounds. In terms of pharmacological mechanisms, the number of trials in dihydropyridine (DHP) calcium antagonists 321 (11.9%) ranked first, while trials in angiotensin receptor blocker (ARB) 289 (10.7%) and dipeptidyl peptidase-4 (DPP-4) inhibitor 205 (7.6%) ranked second and third place respectively. Of 236 chemical polypills trials, 23 (9.7%) polypills were the combination of DHP calcium antagonists and statins, while others were the combination of two same pharmacological effect agents. As for the geographical distribution of leading units, 36 trials were led by principal investigators (PI) units from Beijing, followed by Jiangsu (n = 29), Shanghai (n = 19), Guangdong (n = 19), and Hunan (n = 19), showing an uneven regional distribution. CONCLUSIONS Great progress has been made in drug clinical trials on cardiometabolic diseases, especially in antihypertensive agents, hypoglycemic agents, and hypolipidemic agents. However, the insufficient innovation of first-in-class drugs and polypills should be carefully considered by all stakeholders in drug trials.
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Affiliation(s)
- Chen Li
- Department of Cardiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Jun Hao
- Medical Research and Biometrics Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, National Clinical Research Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, 100037, China
| | - Yitian Zheng
- Department of Cardiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Chuangshi Wang
- Medical Research and Biometrics Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, National Clinical Research Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, 100037, China
| | - Jie Yang
- Department of Cardiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Wenyao Wang
- Department of Cardiology, Institute of Vascular Medicine, Key Laboratory of Molecular Cardiovascular Science, Peking University Third Hospital, Ministry of Education, Beijing, 100191, China
| | - Kuo Zhang
- Department of Cardiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Chunli Shao
- Department of Cardiology, Institute of Vascular Medicine, Key Laboratory of Molecular Cardiovascular Science, Peking University Third Hospital, Ministry of Education, Beijing, 100191, China
| | - Wen Hui
- Department of Science and Technology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jiancheng Wang
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems, State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Wei Li
- Medical Research and Biometrics Center, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College, National Clinical Research Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, 100037, China.
| | - Yi-Da Tang
- Department of Cardiology, Institute of Vascular Medicine, Key Laboratory of Molecular Cardiovascular Science, Peking University Third Hospital, Ministry of Education, Beijing, 100191, China.
- Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China.
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Ferrario CM, Saha A, VonCannon JL, Meredith WJ, Ahmad S. Does the Naked Emperor Parable Apply to Current Perceptions of the Contribution of Renin Angiotensin System Inhibition in Hypertension? Curr Hypertens Rep 2022; 24:709-721. [PMID: 36272015 DOI: 10.1007/s11906-022-01229-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2022] [Indexed: 01/31/2023]
Abstract
PURPOSE OF REVIEW To address contemporary hypertension challenges, a critical reexamination of therapeutic accomplishments using angiotensin converting enzyme inhibitors and angiotensin II receptor blockers, and a greater appreciation of evidence-based shortcomings from randomized clinical trials are fundamental in accelerating future progress. RECENT FINDINGS Medications targeting angiotensin II mechanism of action are essential for managing primary hypertension, type 2 diabetes, heart failure, and chronic kidney disease. While the ability of angiotensin converting enzyme inhibitors and angiotensin II receptor blockers to control blood pressure is undisputed, practitioners, hypertension specialists, and researchers hold low awareness of these drugs' limitations in preventing or reducing the risk of cardiovascular events. Biases in interpreting gained knowledge from data obtained in randomized clinical trials include a pervasive emphasis on using relative risk reduction over absolute risk reduction. Furthermore, recommendations for clinical practice in international hypertension guidelines fail to address the significance of a residual risk several orders of magnitude greater than the benefits. We analyze the limitations of the clinical trials that have led to current recommended treatment guidelines. We define and quantify the magnitude of the residual risk in published hypertension trials and explore how activation of alternate compensatory bioprocessing components within the renin angiotensin system bypass the ability of angiotensin converting enzyme inhibitors and angiotensin II receptor blockers to achieve a significant reduction in total and cardiovascular deaths. We complete this presentation by outlining the current incipient but promising potential of immunotherapy to block angiotensin II pathology alone or possibly in combination with other antihypertensive drugs. A full appreciation of the magnitude of the residual risk associated with current renin angiotensin system-based therapies constitutes a vital underpinning for seeking new molecular approaches to halt or even reverse the cardiovascular complications of primary hypertension and encourage investigating a new generation of ACE inhibitors and ARBs with increased capacity to reach the intracellular compartments at which Ang II can be generated.
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Affiliation(s)
- Carlos M Ferrario
- Laboratory of Translational Hypertension and Vascular Research, Department of General Surgery, Wake Forest School of Medicine, Medical Center Blvd, Atrium Health Wake Forest Baptist, Winston Salem, NC, 27157, USA.
| | - Amit Saha
- Department of Anesthesiology, Wake Forest School of Medicine, Medical Center Blvd, Atrium Health Wake Forest Baptist, Winston Salem, NC, 27157, USA
| | - Jessica L VonCannon
- Laboratory of Translational Hypertension and Vascular Research, Department of General Surgery, Wake Forest School of Medicine, Medical Center Blvd, Atrium Health Wake Forest Baptist, Winston Salem, NC, 27157, USA
| | - Wayne J Meredith
- Laboratory of Translational Hypertension and Vascular Research, Department of General Surgery, Wake Forest School of Medicine, Medical Center Blvd, Atrium Health Wake Forest Baptist, Winston Salem, NC, 27157, USA
| | - Sarfaraz Ahmad
- Laboratory of Translational Hypertension and Vascular Research, Department of General Surgery, Wake Forest School of Medicine, Medical Center Blvd, Atrium Health Wake Forest Baptist, Winston Salem, NC, 27157, USA
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