1
|
Angeli F, Zappa M, Reboldi G, Gentile G, Trapasso M, Spanevello A, Verdecchia P. The spike effect of acute respiratory syndrome coronavirus 2 and coronavirus disease 2019 vaccines on blood pressure. Eur J Intern Med 2023; 109:12-21. [PMID: 36528504 PMCID: PMC9744686 DOI: 10.1016/j.ejim.2022.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/07/2022] [Accepted: 12/12/2022] [Indexed: 12/14/2022]
Abstract
Among the various comorbidities potentially worsening the clinical outcome in patients hospitalized for the acute respiratory syndrome coronavirus-2 (SARS-CoV-2), hypertension is one of the most prevalent. However, the basic mechanisms underlying the development of severe forms of coronavirus disease 2019 (COVID-19) among hypertensive patients remain undefined and the direct association of hypertension with outcome in COVID-19 is still a field of debate. Experimental and clinical data suggest that SARS-CoV-2 infection promotes a rise in blood pressure (BP) during the acute phase of infection. Acute increase in BP and high in-hospital BP variability may be tied with acute organ damage and a worse outcome in patients hospitalized for COVID-19. In this context, the failure of the counter-regulatory renin-angiotensin-system (RAS) axis is a potentially relevant mechanism involved in the raise in BP. It is well recognized that the efficient binding of the Spike (S) protein to angiotensin converting enzyme 2 (ACE2) receptors mediates the virus entry into cells. Internalization of ACE2, downregulation and malfunction predominantly due to viral occupation, dysregulates the protective RAS axis with increased generation and activity of angiotensin (Ang) II and reduced formation of Ang1,7. Thus, the imbalance between Ang II and Ang1-7 can directly contribute to excessively rise BP in the acute phase of SARS-CoV-2 infection. A similar mechanism has been postulated to explain the raise in BP following COVID-19 vaccination ("Spike Effect" similar to that observed during the infection of SARS-CoV-2). S proteins produced upon vaccination have the native-like mimicry of SARS-CoV-2 S protein's receptor binding functionality and prefusion structure and free-floating S proteins released by the destroyed cells previously targeted by vaccines may interact with ACE2 of other cells, thereby promoting ACE2 internalization and degradation, and loss of ACE2 activities.
Collapse
Affiliation(s)
- Fabio Angeli
- Department of Medicine and Surgery, University of Insubria, Varese, 21100, Italy; Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS Tradate, 21049, Italy.
| | - Martina Zappa
- Department of Medicine and Surgery, University of Insubria, Varese, 21100, Italy
| | - Gianpaolo Reboldi
- Department of Medicine, and Centro di Ricerca Clinica e Traslazionale (CERICLET), University of Perugia, Perugia, 06100, Italy
| | - Giorgio Gentile
- College of Medicine and Health. University of Exeter, Exeter, United Kingdom and Department of Nephrology, Royal Cornwall Hospitals NHS Trust, Truro, United Kingdom
| | - Monica Trapasso
- Dipartimento di Igiene e Prevenzione Sanitaria, PSAL, Sede Territoriale di Varese, ATS Insubria, Varese, 21100, Italy
| | - Antonio Spanevello
- Department of Medicine and Surgery, University of Insubria, Varese, 21100, Italy; Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS Tradate, 21049, Italy
| | - Paolo Verdecchia
- Division of Cardiology, Hospital S. Maria della Misericordia, Perugia, and Fondazione Umbra Cuore e Ipertensione-ONLUS, Perugia, 06100, Italy
| |
Collapse
|
2
|
Angeli F, Reboldi G, Trapasso M, Zappa M, Spanevello A, Verdecchia P. COVID-19, vaccines and deficiency of ACE 2 and other angiotensinases. Closing the loop on the "Spike effect". Eur J Intern Med 2022; 103:23-28. [PMID: 35753869 PMCID: PMC9217159 DOI: 10.1016/j.ejim.2022.06.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 06/20/2022] [Indexed: 11/03/2022]
Abstract
The role of a dysregulated renin-angiotensin system (RAS) in the pathogenesis of COVID-19 is well recognized. The imbalance between angiotensin II (Ang II) and Angiotensin1-7 (Ang1,7) caused by the interaction between SARS-CoV-2 and the angiotensin converting enzyme 2 (ACE2) receptors exerts a pivotal role on the clinical picture and outcome of COVID-19. ACE2 receptors are not the exclusive angiotensinases in nature. Other angiotensinases (PRCP, and POP) have the potential to limit the detrimental effects of the interactions between ACE2 and the Spike proteins. In the cardiovascular disease continuum, ACE2 activity tends to decrease, and POP/PRCP activity to increase, from the health status to advanced deterioration of the cardiovascular system. The failure of the counter-regulatory RAS axis during the acute phase of COVID-19 is characterized by a decrease of ACE2 expression coupled to unchanged activity of other angiotensinases, therefore failing to limit the accumulation of Ang II. COVID-19 vaccines increase the endogenous synthesis of SARS-CoV-2 spike proteins. Once synthetized, the free-floating spike proteins circulate in the blood, interact with ACE2 receptors and resemble the pathological features of SARS-CoV-2 ("Spike effect" of COVID-19 vaccines). It has been noted that an increased catalytic activity of POP/PRCP is typical in elderly individuals with comorbidities or previous cardiovascular events, but not in younger people. Thus, the adverse reactions to COVID-19 vaccination associated with Ang II accumulation are generally more common in younger and healthy subjects. Understanding the relationships between different mechanisms of Ang II cleavage and accumulation offers the opportunity to close the pathophysiological loop between the risk of progression to severe forms of COVID-19 and the potential adverse events of vaccination.
Collapse
Affiliation(s)
- Fabio Angeli
- Department of Medicine and Surgery, University of Insubria, Varese, Italy; Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS, Tradate, Italy.
| | - Gianpaolo Reboldi
- Department of Medicine, and Centro di Ricerca Clinica e Traslazionale (CERICLET), University of Perugia, Perugia, Italy
| | - Monica Trapasso
- Dipartimento di Igiene e Prevenzione Sanitaria, ATS Insubria, PSAL, Sede Territoriale di Varese, Varese, Italy
| | - Martina Zappa
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Antonio Spanevello
- Department of Medicine and Surgery, University of Insubria, Varese, Italy; Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS, Tradate, Italy
| | - Paolo Verdecchia
- Division of Cardiology, Hospital S. Maria Della Misericordia, Perugia, Italy; Fondazione Umbra Cuore e Ipertensione-ONLUS, Perugia, Italy
| |
Collapse
|
3
|
Crosstalk between the renin-angiotensin, complement and kallikrein-kinin systems in inflammation. Nat Rev Immunol 2021; 22:411-428. [PMID: 34759348 PMCID: PMC8579187 DOI: 10.1038/s41577-021-00634-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2021] [Indexed: 12/28/2022]
Abstract
During severe inflammatory and infectious diseases, various mediators modulate the equilibrium of vascular tone, inflammation, coagulation and thrombosis. This Review describes the interactive roles of the renin–angiotensin system, the complement system, and the closely linked kallikrein–kinin and contact systems in cell biological functions such as vascular tone and leakage, inflammation, chemotaxis, thrombosis and cell proliferation. Specific attention is given to the role of these systems in systemic inflammation in the vasculature and tissues during hereditary angioedema, cardiovascular and renal glomerular disease, vasculitides and COVID-19. Moreover, we discuss the therapeutic implications of these complex interactions, given that modulation of one system may affect the other systems, with beneficial or deleterious consequences. The renin–angiotensin, complement and kallikrein–kinin systems comprise a multitude of mediators that modulate physiological responses during inflammatory and infectious diseases. This Review investigates the complex interactions between these systems and how these are dysregulated in various conditions, including cardiovascular diseases and COVID-19, as well as their therapeutic implications.
Collapse
|
4
|
De Hert E, Bracke A, Lambeir AM, Van der Veken P, De Meester I. The C-terminal cleavage of angiotensin II and III is mediated by prolyl carboxypeptidase in human umbilical vein and aortic endothelial cells. Biochem Pharmacol 2021; 192:114738. [PMID: 34418354 DOI: 10.1016/j.bcp.2021.114738] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 11/26/2022]
Abstract
The renin-angiotensin system, with the octapeptide angiotensin II as key player, is important in the renal, cardiac and vascular physiology. Prolyl carboxypeptidase (PRCP), prolyl endopeptidase (PREP) and angiotensin converting enzyme 2 (ACE2) are reported to be involved in the conversion of angiotensin II to angiotensin (1-7). Previous investigations showed that the processing of angiotensin II is cell- and species-specific and little is known about its conversion in human endothelial cells. Therefore, we aimed to investigate the C-terminal processing of angiotensin II and III in comparison to the processing of des-Arg9-bradykinin in human endothelial cells. To this end, human umbilical vein and aortic endothelial cells (HUVEC and HAoEC) were incubated with the peptides for different time periods. Mass spectrometry analysis was performed on the supernatants to check for cleavage products. Contribution of PRCP, ACE2 and PREP to the peptide cleavage was evaluated by use of the selective inhibitors compound 8o, DX600 and KYP-2047. The use of these selective inhibitors revealed that the C-terminal cleavage of angiotensin II and III was PRCP-dependent in HUVEC and HAoEC. In contrast, the C-terminal cleavage of des-Arg9-bradykinin was PRCP-dependent in HUVEC and PRCP- and ACE2-dependent in HAoEC. With this study, we contribute to a better understanding of the processing of peptides involved in the alternative renin-angiotensin system. We conclude that PRCP is the main enzyme for the C-terminal processing of angiotensin peptides in human umbilical vein and aortic endothelial cells. For the first time the contribution of PRCP was investigated by use of a selective PRCP-inhibitor.
Collapse
Affiliation(s)
- Emilie De Hert
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium
| | - An Bracke
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium
| | - Anne-Marie Lambeir
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium
| | | | - Ingrid De Meester
- Laboratory of Medical Biochemistry, University of Antwerp, Antwerp, Belgium.
| |
Collapse
|
5
|
Hao P, Liu Y, Guo H, Zhang Z, Chen Q, Hao G, Zhang C, Zhang Y. Prolylcarboxypeptidase Mitigates Myocardial Ischemia/Reperfusion Injury by Stabilizing Mitophagy. Front Cell Dev Biol 2020; 8:584933. [PMID: 33195231 PMCID: PMC7642202 DOI: 10.3389/fcell.2020.584933] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 09/16/2020] [Indexed: 12/17/2022] Open
Abstract
The role of prolylcarboxypeptidase (PRCP) in myocardial ischemia/reperfusion (I/R) injury is unclear. Herein, we aimed to evaluate the protective effect of the PRCP-angiotensin-(1-7) [Ang-(1-7)]/bradykinin-(1-9) [BK-(1-9)] axis on myocardial I/R injury and identify the mechanisms involved. Plasma PRCP level and activity, as well as Ang-(1-7) and BK-(1-9) levels, were compared in healthy subjects, patients with unstable angina, and those with ST-segment-elevated acute myocardial infarction (AMI). Thereafter, the effects of PRCP overexpression and knockdown on left ventricular function, mitophagy, and levels of Ang-(1-7) and BK-(1-9) were examined in rats during myocardial I/R. Finally, the effects of Ang-(1-7) and BK-(1-9) on I/R-induced mitophagy and the signaling pathways involved were investigated in vitro in rat cardiomyocytes. AMI patients showed increased plasma level and activity of PRCP and levels of Ang-(1-7) and BK-(1-9) as compared with healthy subjects and those with unstable angina. PRCP protected against myocardial I/R injury in rats by paradoxical regulation of cardiomyocyte mitophagy during the ischemia and reperfusion phases, which was mediated by downstream Ang-(1-7) and BK-(1-9). We further depicted a possible role of activation of AMPK in mitophagy induction during ischemia and activation of Akt in mitophagy inhibition during reperfusion in the beneficial effects of Ang-(1-7) and BK-(1-9). Thus, the PRCP-Ang-(1-7)/BK-(1-9) axis may protect against myocardial I/R injury by paradoxical regulation of cardiomyocyte mitophagy during ischemia and reperfusion phases.
Collapse
Affiliation(s)
- Panpan Hao
- Department of Cardiology, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yanping Liu
- Department of Cardiology, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Radiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Shenzhen Research Institute of Shandong University, Shenzhen, China
| | - Haipeng Guo
- Department of Cardiology, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Critical Care Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zhongwen Zhang
- Department of Endocrinology and Metabolism, Shandong Provincial Qianfoshan Hospital, The First Hospital Affiliated with Shandong First Medical University, Shandong University, Jinan, China
| | - Qingjie Chen
- First Affiliated Hospital of Xinjiang Medical University, Ürümqi, China
| | - Guoxiang Hao
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Cheng Zhang
- Department of Cardiology, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yun Zhang
- Department of Cardiology, Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| |
Collapse
|
6
|
Kehoe K, Noels H, Theelen W, De Hert E, Xu S, Verrijken A, Arnould T, Fransen E, Hermans N, Lambeir AM, Venge P, Van Gaal L, De Meester I. Prolyl carboxypeptidase activity in the circulation and its correlation with body weight and adipose tissue in lean and obese subjects. PLoS One 2018; 13:e0197603. [PMID: 29772029 PMCID: PMC5957431 DOI: 10.1371/journal.pone.0197603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 05/04/2018] [Indexed: 12/30/2022] Open
Abstract
Background Prolyl carboxypeptidase (PRCP) is involved in the regulation of body weight, likely by hydrolysing alpha-melanocyte-stimulating hormone and apelin in the hypothalamus and in the periphery. A link between PRCP protein concentrations in plasma and metabolic disorders has been reported. In this study, we investigated the distribution of circulating PRCP activity and assessed its relation with body weight and adipose tissue in obese patients and patients who significantly lost weight. Methods PRCP activity was measured using reversed-phase high-performance liquid chromatography in different isolated blood fractions and primary human cells to investigate the distribution of circulating PRCP. PRCP activity was measured in serum of individuals (n = 75) categorized based on their body mass index (BMI < 25.0; 25.0–29.9; 30.0–39.9; ≥ 40.0 kg/m2) and the diagnosis of metabolic syndrome. Differences in serum PRCP activity were determined before and six months after weight loss, either by diet (n = 45) or by bariatric surgery (n = 24). Potential correlations between serum PRCP activity and several metabolic and biochemical parameters were assessed. Additionally, plasma PRCP concentrations were quantified using a sensitive ELISA in the bariatric surgery group. Results White blood cells and plasma contributed the most to circulating PRCP activity. Serum PRCP activity in lean subjects was 0.83 ± 0.04 U/L and increased significantly with a rising BMI (p<0.001) and decreased upon weight loss (diet, p<0.05; bariatric surgery, p<0.001). The serum PRCP activity alteration reflected body weight changes and was found to be positively correlated with several metabolic parameters, including: total, abdominal and visceral adipose tissue. Plasma PRCP concentration was found to be significantly correlated to serum PRCP activity (0.865; p<0.001). Additionally, a significant decrease (p<0.001) in plasma PRCP protein concentration (mean ± SD) before (18.2 ± 3.7 ng/mL) and 6 months after bariatric surgery (15.7 ± 2.7 ng/mL) was found. Conclusion Our novel findings demonstrate that white blood cells and plasma contributed the most to circulating PRCP activity. Additionally, we have shown that there were significant correlations between serum PRCP activity and various metabolic parameters, and that plasma PRCP concentration was significantly correlated to serum PRCP activity. These novel findings on PRCP activity in serum support further investigation of its in vivo role and involvement in several metabolic diseases.
Collapse
Affiliation(s)
- Kaat Kehoe
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Heidi Noels
- Institute for Molecular Cardiovascular Research, RWTH Aachen University, Aachen, Germany
| | - Wendy Theelen
- Institute for Molecular Cardiovascular Research, RWTH Aachen University, Aachen, Germany
| | - Emilie De Hert
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Shenguan Xu
- Section of Clinical Chemistry, Department of Medical Sciences, University of Uppsala, Uppsala, Sweden
| | - An Verrijken
- Department of Endocrinology, Diabetology and Metabolism, Antwerp University Hospital, Edegem, Belgium
- Laboratory of Experimental Medicine and Paediatrics (LEMP), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Thierry Arnould
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur (UNamur), Namur, Belgium
| | - Erik Fransen
- StatUa Center for Statistics, University of Antwerp, Antwerp, Belgium
| | - Nina Hermans
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Anne-Marie Lambeir
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Per Venge
- Section of Clinical Chemistry, Department of Medical Sciences, University of Uppsala, Uppsala, Sweden
| | - Luc Van Gaal
- Department of Endocrinology, Diabetology and Metabolism, Antwerp University Hospital, Edegem, Belgium
- Laboratory of Experimental Medicine and Paediatrics (LEMP), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Ingrid De Meester
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
- * E-mail:
| |
Collapse
|
7
|
Graham TH. Prolylcarboxypeptidase (PrCP) inhibitors and the therapeutic uses thereof: a patent review. Expert Opin Ther Pat 2017; 27:1077-1088. [PMID: 28699813 DOI: 10.1080/13543776.2017.1349104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Prolylcarboxypeptidase (PrCP) is a serine protease that produces or degrades signaling proteins in several important pathways including the renin-angiotensin system (RAS), kallikrein-kinin system (KKS) and pro-opiomelanocortin (POMC) system. PrCP has the potential to be a therapeutic target for cardiovascular, inflammatory and metabolic diseases. Numerous classes of PrCP inhibitors have been developed by rational drug design and from high-throughput screening hits. These inhibitors have been tested in mouse models to assess their potential as new therapeutics. Areas Covered: This review covers the relevant studies that support PrCP as a target for drug discovery. All the significant patent applications and primary literature concerning the development of PrCP inhibitors are discussed. Expert Opinion: The pathways where PrCP is known to operate are complex and many aspects remain to be characterized. Many potent inhibitors of PrCP have been tested in vivo. The variable results obtained from in vivo studies with PrCP inhibitors suggest that additional understanding of the biochemistry and the required therapeutic inhibitor levels is necessary. Additional fundamental research into the signaling pathways is likely required before the true therapeutic potential of PrCP inhibition will be realized.
Collapse
Affiliation(s)
- Thomas H Graham
- a Merck Research Laboratories , Merck & Co., Inc ., Kenilworth , NJ , USA
| |
Collapse
|
8
|
Wheelock KM, Cai J, Looker HC, Merchant ML, Nelson RG, Fufaa GD, Weil EJ, Feldman HI, Vasan RS, Kimmel PL, Rovin BH, Mauer M, Klein JB. Plasma bradykinin and early diabetic nephropathy lesions in type 1 diabetes mellitus. PLoS One 2017; 12:e0180964. [PMID: 28700653 PMCID: PMC5507314 DOI: 10.1371/journal.pone.0180964] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 06/23/2017] [Indexed: 12/18/2022] Open
Abstract
Objective To examine the association of bradykinin and related peptides with the development of diabetic nephropathy lesions in 243 participants with type 1 diabetes (T1D) from the Renin-Angiotensin System Study who, at baseline, were normoalbuminuric, normotensive and had normal or increased glomerular filtration rate (GFR). Design Plasma concentrations of bradykinin and related peptides were measured at baseline by quantitative mass spectrometry. All participants were randomly assigned at baseline to receive placebo, enalapril or losartan during the 5 years between kidney biopsies. Kidney morphometric data were available from kidney biopsies at baseline and after 5 years. Relationships of peptides with changes in morphometric variables were assessed using multiple linear regression after adjustment for age, sex, diabetes duration, HbA1c, mean arterial pressure, treatment assignment and, for longitudinal analyses, baseline structure. Results Baseline median albumin excretion rate of study participants was 5.0 μg/min, and mean GFR was 128 mL/min/1.73 m2. After multivariable adjustment, higher plasma concentration of bradykinin (1–8) was associated with greater glomerular volume (partial r = 0.191, P = 0.019) and total filtration surface area (partial r = 0.211, P = 0.010), and higher bradykinin (1–7) and hyp3-bradykinin (1–7) were associated with lower cortical interstitial fractional volume (partial r = -0.189, P = 0.011; partial r = -0.164, P = 0.027 respectively). In longitudinal analyses, higher bradykinin was associated with preservation of surface density of the peripheral glomerular basement membrane (partial r = 0.162, P = 0.013), and for participants randomized to losartan, higher hyp3-bradykinin (1–8) was associated with more limited increase in cortical interstitial fractional volume (partial r = -0.291, P = 0.033). Conclusions Higher plasma bradykinin and related peptide concentrations measured before clinical onset of diabetic nephropathy in persons with T1D were associated with preservation of glomerular structures, suggesting that elevations of these kinin concentrations may reflect adaptive responses to early renal structural changes in diabetic nephropathy.
Collapse
Affiliation(s)
- Kevin M. Wheelock
- National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona, United States of America
| | - Jian Cai
- University of Louisville, Louisville, Kentucky, United States of America
| | - Helen C. Looker
- National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona, United States of America
| | | | - Robert G. Nelson
- National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona, United States of America
- * E-mail:
| | - Gudeta D. Fufaa
- National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona, United States of America
| | - E. Jennifer Weil
- National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, Arizona, United States of America
| | - Harold I. Feldman
- University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | | | - Paul L. Kimmel
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, United States of America
| | - Brad H. Rovin
- Ohio State University, Columbus, Ohio, United States of America
| | - Michael Mauer
- University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Jon B. Klein
- University of Louisville, Louisville, Kentucky, United States of America
| | | |
Collapse
|
9
|
Maier C, Schadock I, Haber PK, Wysocki J, Ye M, Kanwar Y, Flask CA, Yu X, Hoit BD, Adams GN, Schmaier AH, Bader M, Batlle D. Prolylcarboxypeptidase deficiency is associated with increased blood pressure, glomerular lesions, and cardiac dysfunction independent of altered circulating and cardiac angiotensin II. J Mol Med (Berl) 2017; 95:473-486. [PMID: 28160049 DOI: 10.1007/s00109-017-1513-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/20/2016] [Accepted: 01/20/2017] [Indexed: 12/28/2022]
Abstract
Prolylcarboxypeptidase (PRCP) is a carboxypeptidase that cleaves angiotensin II (AngII) forming Ang(1-7). The impact of genetic PRCP deficiency on AngII metabolism, blood pressure (BP), kidney histology, and cardiac phenotype was investigated in two lines of PRCP-deficient mice: KST302 derived in C57BL/6 background and GST090 derived in FVB/N background. The GST090 line had increased mean arterial pressure (MAP) (113.7 ± 2.07 vs. WT 105.0 ± 1.23 mmHg; p < 0.01) and left ventricular hypertrophy (LVH) (ratio of diastolic left ventricular posterior wall dimension to left ventricular diameter 0.239 ± 0.0163 vs. WT 0.193 ± 0.0049; p < 0.05). Mice in the KST302 line also had mild hypertension and LVH. Cardiac defects, increased glomerular size, and glomerular mesangial expansion were also observed. After infusion of AngII to mice in the KST302 line, both MAP and LVH increased, but the constitutive differences between the gene trap mice and controls were no longer observed. Plasma and cardiac AngII and Ang(1-7) were not significantly different between PRCP-deficient mice and controls. Thus, PRCP deficiency is associated with elevated blood pressure and cardiac alterations including LVH and cardiac defects independently of systemic or cardiac AngII and Ang(1-7). An ex vivo assay showed that recombinant PRCP, unlike recombinant ACE2, did not degrade AngII to form Ang(1-7) in plasma at pH 7.4. PRCP was localized in α-intercalated cells of the kidney collecting tubule. The low pH prevailing at this site and the acidic pH preference of PRCP suggest a role of this enzyme in regulating AngII degradation in the collecting tubule where this peptide increases sodium reabsorption and therfore BP. However, there are other potential mechanisms for increased BP in this model that need to be considered as well. PRCP converts AngII to Ang(1-7) but only at an acidic pH. Global PRCP deficiency causes heart and kidney alterations and a moderate rise in BP. PRCP is abundant in the kidney collecting tubules, where the prevailing pH is low. In collecting tubules, PRCP deficiency could result in impaired AngII degradation. Increased AngII at this nephron site stimulates Na reabsorption and increases BP. KEY MESSAGE Prolylcarboxypeptidase (PRCP) converts AngII to Ang (1-7) but only at an acidic pH. Global PRCP deficiency causes heart and kidney alterations and a moderate rise in BP. PRCP is abundant in the kidney collecting tubules, where the prevailing pH is low. In collecting tubules, PRCP deficiency could result in impaired AngII degradation. Increased AngII at this nephron site stimulates Na reabsorption and increases BP.
Collapse
Affiliation(s)
- Christoph Maier
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ines Schadock
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Philipp K Haber
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Jan Wysocki
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Minghao Ye
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Yashpal Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Christopher A Flask
- Department of Radiology, Case Western Reserve University, Cleveland, OH, USA.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Xin Yu
- Department of Radiology, Case Western Reserve University, Cleveland, OH, USA.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Brian D Hoit
- Department of Medicine, Division of Cardiology, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, OH, USA
| | - Gregory N Adams
- Department of Medicine, Division of Hematology and Oncology, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, OH, USA
| | - Alvin H Schmaier
- Department of Medicine, Division of Hematology and Oncology, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, OH, USA
| | - Michael Bader
- Charité-Universitätsmedizin Berlin, Berlin, Germany.,Max Delbrück Center for Molecular Medicine, Berlin, Germany.,National Institute of Science and Technology in Nanobiopharmaceutics, Federal University of Minas Gerais, Belo Horizonte, Brazil.,German Center for Cardiovascular Research (DZHK), Berlin site, Berlin, Germany
| | - Daniel Batlle
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| |
Collapse
|
10
|
Kehoe K, Van Elzen R, Verkerk R, Sim Y, Van der Veken P, Lambeir AM, De Meester I. Prolyl carboxypeptidase purified from human placenta: its characterization and identification as an apelin-cleaving enzyme. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1864:1481-8. [PMID: 27449720 DOI: 10.1016/j.bbapap.2016.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/11/2016] [Accepted: 07/16/2016] [Indexed: 02/07/2023]
Affiliation(s)
- Kaat Kehoe
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium.
| | - Roos Van Elzen
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Robert Verkerk
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Yani Sim
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Pieter Van der Veken
- Laboratory of Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Anne-Marie Lambeir
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Ingrid De Meester
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| |
Collapse
|
11
|
Wang J, Matafonov A, Madkhali H, Mahdi F, Watson D, Schmaier AH, Gailani D, Shariat-Madar Z. Prolylcarboxypeptidase independently activates plasma prekallikrein (fletcher factor). Curr Mol Med 2015; 14:1173-85. [PMID: 25324000 DOI: 10.2174/1566524014666141015153519] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 04/11/2014] [Accepted: 04/17/2014] [Indexed: 11/22/2022]
Abstract
Prolylcarboxypeptidase isoform 1 (PRCP1) is capable of regulating numerous autocrines and hormones, such as angiotensin II, angiotensin III, αMSH1-13, and DesArg(9) bradykinin. It does so by cleaving a C-terminal PRO-X bond. Recent work also indicates that the human PRCP1 activates plasma prekallikrein (PK) to kallikrein on endothelial cells through an uncharacterized mechanism. This study aims to identify PRCP1 binding interaction and cleavage site on PK. Recently, a cDNA encoding a novel splice variant of the human PRCP1 was identified. This isoform differed only in the N-terminal region of the deduced amino acid sequence. Using structural and functional studies, a combination of peptide mapping and site-directed mutagenesis approaches were employed to investigate the interaction of PRCP1 with PK. Three PRCP peptides, in decreasing order of potency, from 1) the N-terminus of the secreted protein, 2) spanning the opening of the active site pocket, and 3) in the dimerization region inhibit PRCP activation of PK on endothelial cells. Investigations also tested the hypothesis that PRCP cleavage site on PK is between its C-terminal Pro 637 (P(637)) and Ala 638 (A(638)). Recombinant forms of PK with C-terminal alanine mutagenesis or a stop codon is activated equally as wild type PK by PRCP. In conclusion, PRCP1 interacts with PK at multiple sites for PK activation. PRCP1 also enhances FXIIa activation of PK, suggesting that its activation site on PK is not identical to that of FXIIa.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Z Shariat-Madar
- Department of Pharmacology, The University of Mississippi, University, MS 38677- 1848, USA.
| |
Collapse
|
12
|
Prolyl carboxypeptidase activity decline correlates with severity and short-term outcome in acute ischemic stroke. Neurochem Res 2014; 40:81-8. [PMID: 25370794 DOI: 10.1007/s11064-014-1468-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 10/14/2014] [Accepted: 10/27/2014] [Indexed: 12/17/2022]
Abstract
Prolyl carboxypeptidase (PRCP) is an enzyme associated with cerebrovascular risk factors such as hypertension, diabetes mellitus, obesity and hyperlipidemia. We aim to evaluate the relation between serum PRCP activity and severity, evolution and outcome of acute ischemic stroke. We used a specific RP-HPLC activity assay to measure PRCP activity in serum of 50 stroke patients at admission, and at 24 h, 72 h and 7 days after stroke onset to assess correlations with stroke severity based on the National Institutes of Health Stroke scale score (NIHSS), infarct volume on brain MRI scan, stroke outcome based on the modified Rankin scale (mRS) and mortality at 3 months after stroke. The average PRCP activity in serum decreased significantly the first 24 h after stroke onset and returned to baseline values at day 7. High NIHSS scores and infarct volumes at admission were related with a more pronounced decrease of PRCP in the first 24 h after stroke (ΔPRCP24, r = 0.31, P < 0.05; r = 0.30, P < 0.05). In addition, patients who displayed a more pronounced decrease in PRCP levels during the first 24 h after stroke were more likely to be institutionalized upon discharge (n = 21) (ΔPRCP24 ± SD, 0.05 ± 0.10 U/L vs. 0.17 ± 0.14 U/L, P = 0.001). The decrease in PRCP levels in the first 24 h after stroke onset is associated with stroke severity and an unfavourable short-term stroke outcome.
Collapse
|
13
|
Pyrazoles as non-classical bioisosteres in prolylcarboxypeptidase (PrCP) inhibitors. Bioorg Med Chem Lett 2014; 24:1657-60. [PMID: 24636945 DOI: 10.1016/j.bmcl.2014.02.070] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 02/22/2014] [Accepted: 02/25/2014] [Indexed: 01/28/2023]
Abstract
Bioisosteres are integral components of modern pharmaceutical research that allow structural optimization to maximize in vivo efficacy and minimize adverse effects by selectively modifying pharmacodynamic, pharmacokinetic and physicochemical properties. A recent medicinal chemistry campaign focused on identifying small molecule inhibitors of prolylcarboxypeptidase (PrCP) initiated an investigation into the use of pyrazoles as bioisosteres for amides. The results indicate that pyrazoles are suitable bioisosteric replacements of amide functional groups. The study is an example of managing bioisosteric replacement by incorporating subsequent structural modifications to maintain potency against the selected target. A heuristic model for an embedded pharmacophore is also described.
Collapse
|
14
|
Debenham JS, Graham TH, Verras A, Zhang Y, Clements MJ, Kuethe JT, Madsen-Duggan C, Liu W, Bhatt UR, Chen D, Chen Q, Garcia-Calvo M, Geissler WM, He H, Li X, Lisnock J, Shen Z, Tong X, Tung EC, Wiltsie J, Xu S, Hale JJ, Pinto S, Shen DM. Discovery and optimization of orally active cyclohexane-based prolylcarboxypeptidase (PrCP) inhibitors. Bioorg Med Chem Lett 2013; 23:6228-33. [PMID: 24157366 DOI: 10.1016/j.bmcl.2013.09.094] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 09/30/2013] [Indexed: 01/17/2023]
Abstract
The synthesis, SAR, binding affinities and pharmacokinetic profiles are described for a series of cyclohexane-based prolylcarboxypeptidase (PrCP) inhibitors discovered by high throughput screening. Compounds show high levels of ex vivo target engagement in mouse plasma 20 h post oral dose.
Collapse
Affiliation(s)
- John S Debenham
- Department of Medicinal Chemistry, Merck Research Laboratories, PO Box 2000, Rahway, NJ 07065-0900, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Kehoe K, Verkerk R, Sim Y, Waumans Y, Van der Veken P, Lambeir AM, De Meester I. Validation of a specific prolylcarboxypeptidase activity assay and its suitability for plasma and serum measurements. Anal Biochem 2013; 443:232-9. [PMID: 24036038 DOI: 10.1016/j.ab.2013.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 08/29/2013] [Accepted: 09/03/2013] [Indexed: 01/17/2023]
Abstract
Prolylcarboxypeptidase (PRCP, EC 3.4.16.2), a lysosomal carboxypeptidase, was discovered 45 years ago. However, research has been hampered by a lack of well-validated assays that are needed to measure low activities in biological samples. Two reversed-phase high-performance liquid chromatography (RP-HPLC) methods for quantifying PRCP activity in crude homogenates and plasma samples were optimized and validated. PRCP activity was determined by measuring the hydrolysis of N-benzyloxycarbonyl-l-proline (Z-Pro)-Phe. The enzymatically formed Z-Pro and Phe were measured independently under different HPLC conditions. The in-house methods showed good precision, linearity, accuracy, and specificity. Based on Michaelis-Menten constants, Z-Pro-Phe was chosen over Z-Pro-Ala as the substrate of preference. Cross-reactivity studies with dipeptidyl peptidases (DPPs) 2, 4, and 9 and prolyl oligopeptidase (PREP) confirmed the specificity of the PRCP activity assay. The average PRCP activity in plasma and serum of 32 healthy individuals was found to be 0.65 ± 0.02 and 0.72 ± 0.03 U/L, respectively. Both methods can be used to measure PRCP activity specifically in different biological samples and are well suited to evaluate PRCP inhibitors. These well-validated methods are valuable tools for studying PRCP's role in cardiovascular diseases, stroke, inflammation, and metabolic syndrome.
Collapse
Affiliation(s)
- Kaat Kehoe
- Laboratory of Medical Biochemistry, Department of Pharmaceutical Sciences, University of Antwerp, 2610 Antwerp, Belgium
| | | | | | | | | | | | | |
Collapse
|
16
|
Abstract
Prolylcarboxypeptidase (PRCP) is associated with leanness, hypertension, and thrombosis. PRCP-depleted mice have injured vessels with reduced Kruppel-like factor (KLF)2, KLF4, endothelial nitric oxide synthase (eNOS), and thrombomodulin. Does PRCP influence vessel growth, angiogenesis, and injury repair? PRCP depletion reduced endothelial cell growth, whereas transfection of hPRCP cDNA enhanced cell proliferation. Transfection of hPRCP cDNA, or an active site mutant (hPRCPmut) rescued reduced cell growth after PRCP siRNA knockdown. PRCP-depleted cells migrated less on scratch assay and murine PRCP(gt/gt) aortic segments had reduced sprouting. Matrigel plugs in PRCP(gt/gt) mice had reduced hemoglobin content and angiogenic capillaries by platelet endothelial cell adhesion molecule (PECAM) and NG2 immunohistochemistry. Skin wounds on PRCP(gt/gt) mice had delayed closure and reepithelialization with reduced PECAM staining, but increased macrophage infiltration. After limb ischemia, PRCP(gt/gt) mice also had reduced reperfusion of the femoral artery and angiogenesis. On femoral artery wire injury, PRCP(gt/gt) mice had increased neointimal formation, CD45 staining, and Ki-67 expression. Alternatively, combined PRCP(gt/gt) and MRP-14(-/-) mice were protected from wire injury with less neointimal thickening, leukocyte infiltration, and cellular proliferation. PRCP regulates cell growth, angiogenesis, and the response to vascular injury. Combined with its known roles in blood pressure and thrombosis control, PRCP is positioned as a key regulator of vascular homeostasis.
Collapse
|
17
|
Tanco S, Lorenzo J, Garcia-Pardo J, Degroeve S, Martens L, Aviles FX, Gevaert K, Van Damme P. Proteome-derived peptide libraries to study the substrate specificity profiles of carboxypeptidases. Mol Cell Proteomics 2013; 12:2096-110. [PMID: 23620545 DOI: 10.1074/mcp.m112.023234] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Through processing peptide and protein C termini, carboxypeptidases participate in the regulation of various biological processes. Few tools are however available to study the substrate specificity profiles of these enzymes. We developed a proteome-derived peptide library approach to study the substrate preferences of carboxypeptidases. Our COFRADIC-based approach takes advantage of the distinct chromatographic behavior of intact peptides and the proteolytic products generated by the action of carboxypeptidases, to enrich the latter and facilitate its MS-based identification. Two different peptide libraries, generated either by chymotrypsin or by metalloendopeptidase Lys-N, were used to determine the substrate preferences of human metallocarboxypeptidases A1 (hCPA1), A2 (hCPA2), and A4 (hCPA4). In addition, our approach allowed us to delineate the substrate specificity profile of mouse mast cell carboxypeptidase (MC-CPA or mCPA3), a carboxypeptidase suggested to function in innate immune responses regulation and mast cell granule homeostasis, but which thus far lacked a detailed analysis of its substrate preferences. mCPA3 was here shown to preferentially remove bulky aromatic amino acids, similar to hCPA2. This was also shown by a hierarchical cluster analysis, grouping hCPA1 close to hCPA4 in terms of its P1 primed substrate specificity, whereas hCPA2 and mCPA3 cluster separately. The specificity profile of mCPA3 may further aid to elucidate the function of this mast cell carboxypeptidase and its biological substrate repertoire. Finally, we used this approach to evaluate the substrate preferences of prolylcarboxypeptidase, a serine carboxypeptidase shown to cleave C-terminal amino acids linked to proline and alanine.
Collapse
Affiliation(s)
- Sebastian Tanco
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i de Biologia Molecular, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | | | | | | | | | | | | | | |
Collapse
|
18
|
O’Donoghue AJ, Eroy-Reveles AA, Knudsen GM, Ingram J, Zhou M, Statnekov JB, Greninger AL, Hostetter DR, Qu G, Maltby DA, Anderson MO, DeRisi JL, McKerrow JH, Burlingame AL, Craik CS. Global identification of peptidase specificity by multiplex substrate profiling. Nat Methods 2012; 9:1095-100. [PMID: 23023596 PMCID: PMC3707110 DOI: 10.1038/nmeth.2182] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 08/29/2012] [Indexed: 11/08/2022]
Abstract
We developed a simple and rapid multiplex substrate-profiling method to reveal the substrate specificity of any endo- or exopeptidase using liquid chromatography-tandem mass spectrometry sequencing. We generated a physicochemically diverse library of peptides by incorporating all combinations of neighbor and near-neighbor amino acid pairs into decapeptide sequences that are flanked by unique dipeptides at each terminus. Addition of a panel of evolutionarily diverse peptidases to a mixture of these tetradecapeptides generated information on prime and nonprime sites as well as on substrate specificity that matched or expanded upon known substrate motifs. This method biochemically confirmed the activity of the klassevirus 3C protein responsible for polypeptide processing and allowed granzyme B substrates to be ranked by enzymatic turnover efficiency using label-free quantitation of precursor-ion abundance. Additionally, the proteolytic secretions from schistosome parasitic flatworm larvae and a pancreatic cancer cell line were deconvoluted in a subtractive strategy using class-specific peptidase inhibitors.
Collapse
Affiliation(s)
| | - A. Alegra Eroy-Reveles
- Dept. of Pharmaceutical Chemistry, UCSF
- Dept. of Chemistry and Biochemistry, San Francisco State University
| | | | | | - Min Zhou
- Dept. of Pharmaceutical Chemistry, UCSF
| | | | | | | | | | | | - Marc O. Anderson
- Dept. of Chemistry and Biochemistry, San Francisco State University
| | - Joseph L. DeRisi
- Howard Hughes Medical Institute and Dept. of Biochemistry and Biophysics, UCSF
| | | | | | | |
Collapse
|
19
|
Graham TH, Liu W, Verras A, Reibarkh M, Bleasby K, Bhatt UR, Chen Q, Garcia-Calvo M, Geissler WM, Gorski JN, He H, Lassman ME, Lisnock J, Li X, Shen Z, Tong X, Tung EC, Wiltsie J, Xie D, Xu S, Xiao J, Hale JJ, Pinto S, Shen DM. A new class of prolylcarboxypeptidase inhibitors, part 2: the aminocyclopentanes. Bioorg Med Chem Lett 2012; 22:2818-22. [PMID: 22444685 DOI: 10.1016/j.bmcl.2012.02.077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 02/18/2012] [Accepted: 02/23/2012] [Indexed: 01/17/2023]
Abstract
A series of potent inhibitors of prolylcarboxypeptidase (PrCP) was developed by modifying a lead structure that was discovered by high-throughput screening. The tert-butyl pyrrolidine was replaced by an aminocyclopentane to reduce the metabolic liabilities of the original lead. The compounds demonstrated sub-nanomolar in vitro IC(50) values, minimal activity shifts in pure plasma and improved pharmacokinetics. Complete ex vivo plasma target engagement was achieved with low brain exposure at the 20 h time point following p.o. dosing in a mouse. The results indicate that the aminocyclopentanes are useful tools for studying the therapeutic potential of peripheral (non-CNS) PrCP inhibition.
Collapse
Affiliation(s)
- Thomas H Graham
- Department of Medicinal Chemistry, Merck Research Laboratories, Rahway, NJ 07065-0900, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Graham TH, Liu W, Verras A, Sebhat IK, Xiong Y, Bleasby K, Bhatt UR, Chen Q, Garcia-Calvo M, Geissler WM, Gorski JN, He H, Lassman ME, Lisnock J, Li X, Shen Z, Tong X, Tung EC, Wiltsie J, Xiao J, Xie D, Xu S, Hale JJ, Pinto S, Shen DM. A new class of prolylcarboxypeptidase inhibitors, part 1: discovery and evaluation. Bioorg Med Chem Lett 2012; 22:2811-7. [PMID: 22444683 DOI: 10.1016/j.bmcl.2012.02.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 02/18/2012] [Accepted: 02/23/2012] [Indexed: 01/22/2023]
Abstract
A new structural class of potent prolylcarboxypeptidase (PrCP) inhibitors was discovered by high-throughput screening. The series possesses a tractable SAR profile with sub-nanomolar in vitro IC(50) values. Compared to prior inhibitors, the new series demonstrated minimal activity shifts in pure plasma and complete ex vivo plasma target engagement in mouse plasma at the 20 h post-dose time point (po). In addition, the in vivo level of CNS and non-CNS drug exposure was measured.
Collapse
Affiliation(s)
- Thomas H Graham
- Department of Medicinal Chemistry, Merck Research Laboratories, Rahway, NJ 07065-0900, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Rabey FM, Gadepalli R, Diano S, Cheng Q, Tabrizian T, Gailani D, Rimoldi J, Shariat-Madar Z. Influence of a novel inhibitor (UM8190) of prolylcarboxypeptidase (PRCP) on appetite and thrombosis. Curr Med Chem 2012; 19:4194-206. [PMID: 22664251 PMCID: PMC4367813 DOI: 10.2174/092986712802430036] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 04/02/2012] [Accepted: 04/02/2012] [Indexed: 11/22/2022]
Abstract
Preclinical pharmacological characterization of a novel inhibitor (UM8190) of prolylcarboxypeptidase (PRCP) was investigated. We synthesized and evaluated a library of proline-based analogs as prospective recombinant PRCP (rPRCP) inhibitors and inhibitors of PRCP-dependent prekallikrein (PK) activation on human pulmonary artery endothelial cells (HPAEC). Among the newly synthesized compounds, UM8190 was further characterized in vivo using methods that encompassed a mouse carotid artery thrombosis model and animal model of food consumption. (S)-N-dodecyl-1-((S)-pyrrolidine-2-carbonyl) pyrrolidine-2-carboxamide [Compound 3 (UM8190)] was selected for further evaluation from the initial assessment of its PRCP inhibitory action (K(i)= 43 μM) coupled with its ability to block PRCP-dependent PK activation on HPAEC (K(i)= 34 μM). UM8190 demonstrated excellent selectivity against a panel of carboxypeptidases and serine proteases and blocked bradykinin (BK) generation and BK-induced permeability by 100%, suggesting that it may be useful in preventing the local production of large amounts of BK. Furthermore, UM8190 showed an anorexigenic effect when systemically administered to fasted mice, reducing food intake in a dose- and time-dependent manner. In a mouse carotid artery thrombosis model, it also demonstrated an antithrombotic effect. UM8190 is a selective PRCP inhibitor and it may represent a new anorexigenic, and antithrombotic drug, that works by inhibiting PRCP-mediated mechanisms.
Collapse
Affiliation(s)
- F. M. Rabey
- School of Pharmacy, Department of Pharmacology
| | - R.S.V.S. Gadepalli
- Department of Medicinal Chemistry, University of Mississippi, University, MS 38677-1848
| | - S. Diano
- Program in Cell Signaling and Neurobiology of Metabolism, Departments of Obstetrics, Gynecology & Reproductive Sciences, Neurobiology and Comparative Medicine Yale University School of Medicine, New Haven, CT 06510, USA
| | - Q. Cheng
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN 37232-6307
| | | | - D. Gailani
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN 37232-6307
| | - J.M. Rimoldi
- Department of Medicinal Chemistry, University of Mississippi, University, MS 38677-1848
| | | |
Collapse
|
22
|
Current World Literature. Curr Opin Nephrol Hypertens 2012; 21:106-18. [DOI: 10.1097/mnh.0b013e32834ee42b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
23
|
Graham TH, Shen HC, Liu W, Xiong Y, Verras A, Bleasby K, Bhatt UR, Chabin RM, Chen D, Chen Q, Garcia-Calvo M, Geissler WM, He H, Lassman ME, Shen Z, Tong X, Tung EC, Xie D, Xu S, Colletti SL, Tata JR, Hale JJ, Pinto S, Shen DM. The discovery of non-benzimidazole and brain-penetrant prolylcarboxypeptidase inhibitors. Bioorg Med Chem Lett 2011; 22:658-65. [PMID: 22079761 DOI: 10.1016/j.bmcl.2011.10.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 10/17/2011] [Accepted: 10/18/2011] [Indexed: 01/18/2023]
Abstract
Novel prolylcarboxypeptidase (PrCP) inhibitors with nanomolar IC(50) values were prepared by replacing the previously described dichlorobenzimidazole-substituted pyrrolidine amides with a variety of substituted benzylamine amides. In contrast to prior series, the compounds demonstrated minimal inhibition shift in whole serum and minimal recognition by P-glycoprotein (P-gp) efflux transporters. The compounds were also cell permeable and demonstrated in vivo brain exposure. The in vivo effect of compound (S)-6e on weight loss in an established diet-induced obesity (eDIO) mouse model was studied.
Collapse
Affiliation(s)
- Thomas H Graham
- Department of Medicinal Chemistry, Merck Research Laboratories, PO Box 2000, Rahway, NJ 07065-0900, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Kolte D, Osman N, Yang J, Shariat-Madar Z. High molecular weight kininogen activates B2 receptor signaling pathway in human vascular endothelial cells. J Biol Chem 2011; 286:24561-71. [PMID: 21586566 DOI: 10.1074/jbc.m110.211557] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The nonenzymatic cofactor high molecular weight kininogen (HK) is a precursor of bradykinin (BK). The production of BK from HK by plasma kallikrein has been implicated in the pathogenesis of inflammation and vascular injury. However, the functional role of HK in the absence of prekallikrein (PK), the proenzyme of plasma kallikrein, on vascular endothelial cells is not fully defined. In addition, no clinical abnormality is seen in PK-deficient patients. Therefore, an investigation into the effect of HK, in the absence of PK, on human pulmonary artery endothelial cell (HPAEC) function was performed. HK caused a marked and dose-dependent increase in the intracellular calcium [Ca(2+)](i) level in HPAEC. Gd(3+) and verapamil potentiated the HK-induced increase in [Ca(2+)](i). HK-induced Ca(2+) increase stimulated endothelial nitric oxide (NO) and prostacyclin (PGI(2)) production. The inhibitors of B(2) receptor-dependent signaling pathway impaired HK-mediated signal transduction in HPAEC. HK had no effect on endothelial permeability at physiological concentration. This study demonstrated that HK regulates endothelial cell function. HK could play an important role in maintaining normal endothelial function and blood flow and serve as a cardioprotective peptide.
Collapse
Affiliation(s)
- Dhaval Kolte
- Departmen of Pharmacology, University of Mississippi, USA
| | | | | | | |
Collapse
|