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Ciampi CM, Sultana A, Ossola P, Farina A, Fragasso G, Spoladore R. Current experimental and early investigational agents for cardiac fibrosis: where are we at? Expert Opin Investig Drugs 2024; 33:389-404. [PMID: 38426439 DOI: 10.1080/13543784.2024.2326024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 02/28/2024] [Indexed: 03/02/2024]
Abstract
INTRODUCTION Myocardial fibrosis (MF) is induced by factors activating pro-fibrotic pathways such as acute and prolonged inflammation, myocardial ischemic events, hypertension, aging process, and genetically-linked cardiomyopathies. Dynamics and characteristics of myocardial fibrosis development are very different. The broad range of myocardial fibrosis presentations suggests the presence of multiple potential targets. AREA COVERED Heart failure treatment involves medications primarily aimed at counteracting neurohormonal activation. While these drugs have demonstrated efficacy against MF, not all specifically target inflammation or fibrosis progression with some exceptions such as RAAS inhibitors. Consequently, new therapies are being developed to address this issue. This article is aimed to describe anti-fibrotic drugs currently employed in clinical practice and emerging agents that target specific pathways, supported by evidence from both preclinical and clinical studies. EXPERT OPINION Despite various preclinical findings suggesting the potential utility of new drugs and molecules for treating cardiac fibrosis in animal models, there is a notable scarcity of clinical trials investigating these effects. However, the pathology of damage and repair in the heart muscle involves a complex network of interconnected inflammatory pathways and various types of immune cells. Our comprehension of the positive and negative roles played by specific immune cells and cytokines is an emerging area of research.
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Affiliation(s)
- Claudio M Ciampi
- Health Science Department, University of Milan Bicocca, Milano, Italy
| | - Andrea Sultana
- Health Science Department, University of Milan Bicocca, Milano, Italy
| | - Paolo Ossola
- Health Science Department, University of Milan Bicocca, Milano, Italy
| | - Andrea Farina
- Division of Cardiology, Alessandro Manzoni Hospital, ASST- Lecco, Italy
| | - Gabriele Fragasso
- Heart Failure Unit Head, Division of Cardiology, IRCCS Vita-Salute San Raffaele University Hospital, Milan, Italy
| | - Roberto Spoladore
- Division of Cardiology, Alessandro Manzoni Hospital, ASST- Lecco, Italy
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Suhail H, Peng H, Matrougui K, Rhaleb NE. Ac-SDKP attenuates ER stress-stimulated collagen production in cardiac fibroblasts by inhibiting CHOP-mediated NF-κB expression. Front Pharmacol 2024; 15:1352222. [PMID: 38495093 PMCID: PMC10940518 DOI: 10.3389/fphar.2024.1352222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 02/19/2024] [Indexed: 03/19/2024] Open
Abstract
Inflammation and cardiac fibrosis are prevalent pathophysiologic conditions associated with hypertension, cardiac remodeling, and heart failure. Endoplasmic reticulum (ER) stress triggers the cells to activate unfolded protein responses (UPRs) and upregulate the ER stress chaperon, enzymes, and downstream transcription factors to restore normal ER function. The mechanisms that link ER stress-induced UPRs upregulation and NF-κB activation that results in cardiac inflammation and collagen production remain elusive. N-Acetyl-Ser-Asp-Lys-Pro (Ac-SDKP), a natural tetrapeptide that negatively regulates inflammation and fibrosis, has been reported. Whether it can inhibit ER stress-induced collagen production in cardiac fibroblasts remains unclear. Thus, we hypothesized that Ac-SDKP attenuates ER stress-stimulated collagen production in cardiac fibroblasts by inhibiting CHOP-mediated NF-κB expression. We aimed to study whether Ac-SDKP inhibits tunicamycin (TM)-induced ER stress signaling, NF-κB signaling, the release of inflammatory cytokine interleukin-6, and collagen production in human cardiac fibroblasts (HCFs). HCFs were pre-treated with Ac-SDKP (10 nM) and then stimulated with TM (0.25 μg/mL). We found that Ac-SDKP inhibits TM-induced collagen production by attenuating ER stress-induced UPRs upregulation and CHOP/NF-κB transcriptional signaling pathways. CHOP deletion by specific shRNA maintains the inhibitory effect of Ac-SDKP on NF-κB and type-1 collagen (Col-1) expression at both protein and mRNA levels. Attenuating ER stress-induced UPR sensor signaling by Ac-SDKP seems a promising therapeutic strategy to combat detrimental cardiac inflammation and fibrosis.
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Affiliation(s)
- Hamid Suhail
- Department of Internal Medicine, Hypertension and Vascular Research Division, Henry Ford Hospital, Detroit, MI, United States
| | - Hongmei Peng
- Department of Internal Medicine, Hypertension and Vascular Research Division, Henry Ford Hospital, Detroit, MI, United States
| | - Khalid Matrougui
- Department of Physiology Sciences, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Nour-Eddine Rhaleb
- Department of Internal Medicine, Hypertension and Vascular Research Division, Henry Ford Hospital, Detroit, MI, United States
- Department of Physiology, Wayne State University, Detroit, MI, United States
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Teixeira CSS, Biltes R, Villa C, Sousa SF, Costa J, Ferreira IMPLVO, Mafra I. Exploiting Locusta migratoria as a source of bioactive peptides with anti-fibrosis properties using an in silico approach. Food Funct 2024; 15:493-502. [PMID: 38099620 DOI: 10.1039/d3fo04246d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Edible insects have been proposed as an environmentally and economically sustainable source of protein, and are considered as an alternative food, especially to meat. The migratory locust, Locusta migratoria, is an edible species authorised by the European Union as a novel food. In addition to their nutritional value, edible insects are also sources of bioactive compounds. This study used an in silico approach to simulate the gastrointestinal digestion of selected L. migratoria proteins and posteriorly identify peptides capable of selectively inhibiting the N-subunit of the somatic angiotensin-I converting enzyme (sACE). The application of the molecular docking protocol enabled the identification of three peptides, namely TCDSL, IDCSR and EAEEGQF, which were predicted to act as potential selective inhibitors of the sACE N-domain and, therefore, possess bioactivity against cardiac and pulmonary fibrosis.
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Affiliation(s)
- Carla S S Teixeira
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Rita Biltes
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Caterina Villa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Sérgio F Sousa
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, BioSIM - Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Joana Costa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Isabel M P L V O Ferreira
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Isabel Mafra
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
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Gregory KS, Cozier GE, Schwager SLU, Sturrock ED, Acharya KR. Structural insights into the inhibitory mechanism of angiotensin-I-converting enzyme by the lactotripeptides IPP and VPP. FEBS Lett 2024; 598:242-251. [PMID: 37904282 PMCID: PMC10952540 DOI: 10.1002/1873-3468.14768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/12/2023] [Accepted: 10/15/2023] [Indexed: 11/01/2023]
Abstract
Human somatic angiotensin-1-converting enzyme (sACE) is composed of a catalytic N-(nACE) and C-domain (cACE) of similar size with different substrate specificities. It is involved in the regulation of blood pressure by converting angiotensin I to the vasoconstrictor angiotensin II and has been a major focus in the development of therapeutics for hypertension. Bioactive peptides from various sources, including milk, have been identified as natural ACE inhibitors. We report the structural basis for the role of two lacototripeptides, Val-Pro-Pro and Ile-Pro-Pro, in domain-specific inhibition of ACE using X-ray crystallography and kinetic analysis. The lactotripeptides have preference for nACE due to altered polar interactions distal to the catalytic zinc ion. Elucidating the mechanism of binding and domain selectivity of these peptides also provides important insights into the functional roles of ACE.
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Affiliation(s)
| | | | - Sylva L. U. Schwager
- Department of Integrative Biomedical SciencesInstitute of Infectious Disease and Molecular Medicine, University of Cape TownSouth Africa
| | - Edward D. Sturrock
- Department of Integrative Biomedical SciencesInstitute of Infectious Disease and Molecular Medicine, University of Cape TownSouth Africa
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Teixeira CSS, Villa C, Sousa SF, Costa J, Ferreira IMPLVO, Mafra I. An in silico approach to unveil peptides from Acheta domesticus with potential bioactivity against hypertension, diabetes, cardiac and pulmonary fibrosis. Food Res Int 2023; 169:112847. [PMID: 37254421 DOI: 10.1016/j.foodres.2023.112847] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/30/2023] [Accepted: 04/14/2023] [Indexed: 06/01/2023]
Abstract
Entomophagy is a sustainable alternative source of proteins for human nutrition. Acheta domesticus is one of the three insect species that complies with the European Union Regulation on novel foods, but to date, there are no reports on their potential bioactive peptides. In this study, an in silico approach was applied to simulate the gastrointestinal (GI) digestion of six A. domesticus proteins and identify new peptides with potential anti-hypertensive and/or anti-diabetic properties, resulting from their capability to inhibit the somatic Angiotensin-I converting enzyme (sACE) and/or dipeptidyl peptidase 4 (DPP-4), respectively. A molecular docking protocol was applied to evaluate the binding interactions between the 43 peptides ranked with high probability of being bioactive and three drug targets: DPP-4 and two catalytic domains (N- and C-) of sACE. Five peptides (AVQPCF, CAIAW, IIIGW, DATW and QIVW) showed high docking scores for both enzymes, suggesting their potential to inhibit the DPP-4 and both catalytic domains of sACE, thus possessing multifunctional bioactive properties. Two peptides (PIVCF and DVW) showed higher docking scores for the N-domain of sACE, indicating a potential action as selective inhibitors and consequently with anti-cardiac and pulmonary fibrosis bioactivities. This is the first study identifying peptides originated from the simulated GI digestion of A. domesticus with potential activities against hypertension, diabetes, cardiac and pulmonary fibrosis.
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Affiliation(s)
- Carla S S Teixeira
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Caterina Villa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Sérgio F Sousa
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal; UCIBIO - Applied Molecular Biosciences Unit, BioSIM - Department of Biomedicine, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Joana Costa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Isabel M P L V O Ferreira
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Isabel Mafra
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
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Sonkawade SD, Xu S, Kim M, Nepali S, Karambizi VG, Sexton S, Turowski SG, Li K, Spernyak JA, Lovell JF, George A, Suwal S, Sharma UC, Pokharel S. Phospholipid Encapsulation of an Anti-Fibrotic Endopeptide to Enhance Cellular Uptake and Myocardial Retention. Cells 2023; 12:1589. [PMID: 37371059 PMCID: PMC10296995 DOI: 10.3390/cells12121589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 05/24/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Cardioprotective effects of N-acetyl-ser-asp-lys-pro (Ac-SDKP) have been reported in preclinical models of myocardial remodeling. However, the rapid degradation of this endogenous peptide in vivo limits its clinical use. METHOD To prolong its bioavailability, Ac-SDKP was encapsulated by phosphocholine lipid bilayers (liposomes) similar to mammalian cell membranes. The physical properties of the liposome structures were assessed by dynamic light scattering and scanning electron microscopy. The uptake of Ac-SDKP by RAW 264.7 macrophages and human and murine primary cardiac fibroblasts was confirmed by fluorescence microscopy and flow cytometry. Spectrum computerized tomography and competitive enzyme-linked immunoassays were performed to measure the ex vivo cardiac biodistribution of Ac-SDKP. The biological effects of this novel synthetic compound were examined in cultured macrophages and cardiac fibroblasts and in a murine model of acute myocardial infarction induced by permanent coronary artery ligation. RESULTS A liposome formulation resulted in the greater uptake of Ac-SDKP than the naked peptide by cultured RAW 264.7 macrophages and cardiac fibroblasts. Liposome-delivered Ac-SDKP decreased fibroinflammatory genes in cultured cardiac fibroblasts co-treated with TGF-β1 and macrophages stimulated with LPS. Serial tissue and serum immunoassays showed the high bioavailability of Ac-SDKP in mouse myocardium and in circulation. Liposome-delivered Ac-SDKP improved cardiac function and reduced myocardial fibroinflammatory responses in mice with acute myocardial infarction. CONCLUSION Encapsulation of Ac-SDKP in a cell membrane-like phospholipid bilayer enhances its plasma and tissue bioavailability and offers cardioprotection against ischemic myocardial injury. Future clinical trials can use this novel approach to test small protective endogenous peptides in myocardial remodeling.
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Affiliation(s)
- Swati D. Sonkawade
- Department of Medicine, Division of Cardiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14260, USA; (S.D.S.)
- Laboratory Medicine, Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Shirley Xu
- Department of Medicine, Division of Cardiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14260, USA; (S.D.S.)
- Laboratory Medicine, Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Minhyung Kim
- Department of Surgical Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Sarmila Nepali
- Laboratory Medicine, Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Victoire-Grace Karambizi
- Department of Medicine, Division of Cardiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14260, USA; (S.D.S.)
- Laboratory Medicine, Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Sandra Sexton
- Laboratory Animal Shared Resource, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Steven G. Turowski
- Translational Imaging Shared Resources, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Kunpeng Li
- Department of Physiology and Biophysics, Case Western Reserve School of Medicine, Cleveland, OH 44106, USA
| | - Joseph A. Spernyak
- Translational Imaging Shared Resources, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Jonathan F. Lovell
- Department of Biomedical Engineering, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14260, USA
| | - Anthony George
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14203, USA
| | - Sujit Suwal
- Department of Chemistry, Buffalo State University, Buffalo, NY 14222, USA
| | - Umesh C. Sharma
- Department of Medicine, Division of Cardiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY 14260, USA; (S.D.S.)
| | - Saraswati Pokharel
- Laboratory Medicine, Department of Pathology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
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Suhail H, Peng H, Xu J, Sabbah HN, Matrougui K, Liao TD, Ortiz PA, Bernstein KE, Rhaleb NE. Knockout of ACE-N facilitates improved cardiac function after myocardial infarction. J Mol Cell Cardiol Plus 2023; 3:100024. [PMID: 36778784 PMCID: PMC9910327 DOI: 10.1016/j.jmccpl.2022.100024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Angiotensin-converting enzyme (ACE) hydrolyzes N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP) into inactive fragments through its N-terminal site (ACE-N). We previously showed that Ac-SDKP mediates ACE inhibitors' cardiac effects. Whether increased bioavailability of endogenous Ac-SDKP caused by knocking out ACE-N also improves cardiac function in myocardial infarction (MI)-induced heart failure (HF) is unknown. Wild-type (WT) and ACE-N knockout (ACE-NKO) mice were subjected to MI by ligating the left anterior descending artery and treated with vehicle or Ac-SDKP (1.6 mg/kg/day, s.c.) for 5 weeks, after which echocardiography was performed and left ventricles (LV) were harvested for histology and molecular biology studies. ACE-NKO mice showed increased plasma Ac-SDKP concentrations in both sham and MI group compared to WT. Exogenous Ac-SDKP further increased its circulating concentrations in WT and ACE-NKO. Shortening (SF) and ejection (EF) fractions were significantly decreased in both WT and ACE-NKO mice post-MI, but ACE-NKO mice exhibited significantly lesser decrease. Exogenous Ac-SDKP ameliorated cardiac function post-MI only in WT but failed to show any additive improvement in ACE-NKO mice. Sarcoendoplasmic reticulum calcium transport ATPase (SERCA2), a marker of cardiac function and calcium homeostasis, was significantly decreased in WT post-MI but rescued with Ac-SDKP, whereas ACE-NKO mice displayed less loss of SERCA2 expression. Our study demonstrates that gene deletion of ACE-N resulted in improved LV cardiac function in mice post-MI, which is likely mediated by increased circulating Ac-SDKP and minimally reduced expression of SERCA2. Thus, future development of specific and selective inhibitors for ACE-N could represent a novel approach to increase endogenous Ac-SDKP toward protecting the heart from post-MI remodeling.
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Affiliation(s)
- Hamid Suhail
- Department of Internal Medicine, Hypertension and Vascular
Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
| | - Hongmei Peng
- Department of Internal Medicine, Hypertension and Vascular
Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
| | - Jiang Xu
- Department of Internal Medicine, Hypertension and Vascular
Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
- Division of Cardiovascular Medicine, Department of
Internal Medicine, Henry Ford Health, Detroit, MI 48202, USA
| | - Hani N. Sabbah
- Division of Cardiovascular Medicine, Department of
Internal Medicine, Henry Ford Health, Detroit, MI 48202, USA
| | - Khalid Matrougui
- Department of Physiology Sciences, Eastern Virginia
Medical School, Norfolk, VA 23501, USA
| | - Tang-Dong Liao
- Department of Internal Medicine, Hypertension and Vascular
Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
| | - Pablo A. Ortiz
- Department of Internal Medicine, Hypertension and Vascular
Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
- Department of Physiology, Wayne State University, Detroit,
MI 48201, USA
| | - Kenneth E. Bernstein
- Department of Biomedical Sciences, Cedars-Sinai Medical
Center, Los Angeles, CA, USA
| | - Nour-Eddine Rhaleb
- Department of Internal Medicine, Hypertension and Vascular
Research Division, Henry Ford Hospital, Detroit, MI 48202, USA
- Department of Physiology, Wayne State University, Detroit,
MI 48201, USA
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Gao Y, Sun Y, Islam S, Nakamura T, Tomita T, Zou K, Michikawa M. Presenilin 1 deficiency impairs Aβ42-to-Aβ40- and angiotensin-converting activities of ACE. Front Aging Neurosci 2023; 15:1098034. [PMID: 36875692 PMCID: PMC9981673 DOI: 10.3389/fnagi.2023.1098034] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 01/20/2023] [Indexed: 02/19/2023] Open
Abstract
Introduction Alzheimer's disease (AD) is associated with amyloid β-protein 1-42 (Aβ42) accumulation in the brain. Aβ42 and Aβ40 are the major two species generated from amyloid precursor protein. We found that angiotensin-converting enzyme (ACE) converts neurotoxic Aβ42 to neuroprotective Aβ40 in an ACE domain- and glycosylation-dependent manner. Presenilin 1 (PS1) mutations account for most of cases of familial AD and lead to an increased Aβ42/40 ratio. However, the mechanism by which PSEN1 mutations induce a higher Aβ42/40 ratio is unclear. Methods We over expressed human ACE in mouse wild-type and PS1-deficient fibroblasts. The purified ACE protein was used to analysis the Aβ42-to-Aβ40- and angiotensin-converting activities. The distribution of ACE was determined by Immunofluorescence staining. Result We found that ACE purified from PS1-deficient fibroblasts exhibited altered glycosylation and significantly reduced Aβ42-to-Aβ40- and angiotensin-converting activities compared with ACE from wild-type fibroblasts. Overexpression of wild-type PS1 in PS1-deficient fibroblasts restored the Aβ42-to-Aβ40- and angiotensin-converting activities of ACE. Interestingly, PS1 mutants completely restored the angiotensin-converting activity in PS1-deficient fibroblasts, but some PS1 mutants did not restore the Aβ42-to-Aβ40-converting activity. We also found that the glycosylation of ACE in adult mouse brain differed from that of embryonic brain and that the Aβ42-to-Aβ40-converting activity in adult mouse brain was lower than that in embryonic brain. Conclusion PS1 deficiency altered ACE glycosylation and impaired its Aβ42-to-Aβ40- and angiotensin-converting activities. Our findings suggest that PS1 deficiency and PSEN1 mutations increase the Aβ42/40 ratio by reducing the Aβ42-to-Aβ40-converting activity of ACE.
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Affiliation(s)
- Yuan Gao
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Yang Sun
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Sadequl Islam
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Tomohisa Nakamura
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Taisuke Tomita
- Laboratory of Neuropathology and Neuroscience, Faculty of Pharmaceutical Sciences, University of Tokyo, Bunkyo, Japan
| | - Kun Zou
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Makoto Michikawa
- Department of Biochemistry, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
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da Silva RL, Papakyriakou A, Carmona AK, Spyroulias GA, Sturrock ED, Bersanetti PA, Nakaie CR. Peptide inhibitors of angiotensin-I converting enzyme based on angiotensin (1–7) with selectivity for the C-terminal domain. Bioorg Chem 2022; 129:106204. [DOI: 10.1016/j.bioorg.2022.106204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 11/18/2022]
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10
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Su Y, Chen S, Shen J, Yi Z, Liu S, Cai S, Pan N, Qiao K, Chen X, Chen B, Xu M, Yang S, Liu Z. Screening and Molecular Mechanisms of Novel ACE-Inhibitory Peptides from Gracilariopsis lemaneiformis. Int J Mol Sci 2022; 23. [PMID: 36499176 DOI: 10.3390/ijms232314850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/10/2022] [Accepted: 11/19/2022] [Indexed: 12/05/2022] Open
Abstract
Candidate peptides with novel angiotensin-I-converting enzyme (ACE) inhibitor activity were obtained from hydrolysates of Gracilariopsis lemaneiformis by virtual screening method. Our results showed that G. lemaneiformis peptides (GLP) could significantly lower blood pressure in spontaneously hypertensive rats (SHR). At least 101 peptide sequences of GLP were identified by LC-MS/MS analysis and subjected to virtual screening. A total of 20 peptides with the highest docking score were selected and chemically synthesized in order to verify their ACE-inhibitory activities. Among them, SFYYGK, RLVPVPY, and YIGNNPAKG showed good effects with IC50 values of 6.45 ± 0.22, 9.18 ± 0.42, and 11.23 ± 0.23 µmoL/L, respectively. Molecular docking studies revealed that three peptides interacted with the active center of ACE by hydrogen bonding, hydrophobic interactions, and electrostatic forces. These peptides could form stable complexes with ACE. Furthermore, SFYYGK, RLVPVPY, and YIGNNPAKG significantly reduced systolic blood pressure (SBP) in SHR. YIGNNPAKG exhibited the highest antihypertensive effect, with the largest decrease in SBP (approximately 23 mmHg). In conclusion, SFYYGK, RLVPVPY, and YIGNNPAKG can function as potent therapeutic candidates for hypertension treatment.
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11
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Cozier GE, Newby EC, Schwager SLU, Isaac RE, Sturrock ED, Acharya KR. Structural basis for the inhibition of human angiotensin-1 converting enzyme by fosinoprilat. FEBS J 2022; 289:6659-6671. [PMID: 35653492 PMCID: PMC9796954 DOI: 10.1111/febs.16543] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/24/2022] [Accepted: 06/01/2022] [Indexed: 01/07/2023]
Abstract
Human angiotensin I-converting enzyme (ACE) has two isoforms, somatic ACE (sACE) and testis ACE (tACE). The functions of sACE are widespread, with its involvement in blood pressure regulation most extensively studied. sACE is composed of an N-domain (nACE) and a C-domain (cACE), both catalytically active but have significant structural differences, resulting in different substrate specificities. Even though ACE inhibitors are used clinically, they need much improvement because of serious side effects seen in patients (~ 25-30%) with long-term treatment due to nonselective inhibition of nACE and cACE. Investigation into the distinguishing structural features of each domain is therefore of vital importance for the development of domain-specific inhibitors with minimal side effects. Here, we report kinetic data and high-resolution crystal structures of both nACE (1.75 Å) and cACE (1.85 Å) in complex with fosinoprilat, a clinically used inhibitor. These structures allowed detailed analysis of the molecular features conferring domain selectivity by fosinoprilat. Particularly, altered hydrophobic interactions were observed to be a contributing factor. These experimental data contribute to improved understanding of the structural features that dictate ACE inhibitor domain selectivity, allowing further progress towards designing novel 2nd-generation domain-specific potent ACE inhibitors suitable for clinical administration, with a variety of potential future therapeutic benefits. DATABASE: The atomic coordinates and structure factors for nACE-fosinoprilat and cACE-fosinoprilat structures have been deposited with codes 7Z6Z and 7Z70, respectively, in the RCSB Protein Data Bank, www.pdb.org.
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Affiliation(s)
| | - Emma C. Newby
- Department of Biology and BiochemistryUniversity of BathUK
| | - Sylva L. U. Schwager
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular MedicineUniversity of Cape TownSouth Africa
| | | | - Edward D. Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular MedicineUniversity of Cape TownSouth Africa
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12
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Lubbe L, Sewell BT, Woodward JD, Sturrock ED. Cryo-EM reveals mechanisms of angiotensin I-converting enzyme allostery and dimerization. EMBO J 2022; 41:e110550. [PMID: 35818993 PMCID: PMC9379546 DOI: 10.15252/embj.2021110550] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 04/21/2022] [Accepted: 05/27/2022] [Indexed: 11/09/2022] Open
Abstract
Hypertension (high blood pressure) is a major risk factor for cardiovascular disease, which is the leading cause of death worldwide. The somatic isoform of angiotensin I‐converting enzyme (sACE) plays a critical role in blood pressure regulation, and ACE inhibitors are thus widely used to treat hypertension and cardiovascular disease. Our current understanding of sACE structure, dynamics, function, and inhibition has been limited because truncated, minimally glycosylated forms of sACE are typically used for X‐ray crystallography and molecular dynamics simulations. Here, we report the first cryo‐EM structures of full‐length, glycosylated, soluble sACE (sACES1211). Both monomeric and dimeric forms of the highly flexible apo enzyme were reconstructed from a single dataset. The N‐ and C‐terminal domains of monomeric sACES1211 were resolved at 3.7 and 4.1 Å, respectively, while the interacting N‐terminal domains responsible for dimer formation were resolved at 3.8 Å. Mechanisms are proposed for intradomain hinging, cooperativity, and homodimerization. Furthermore, the observation that both domains were in the open conformation has implications for the design of sACE modulators.
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Affiliation(s)
- Lizelle Lubbe
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Bryan Trevor Sewell
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Electron Microscope Unit, University of Cape Town, Cape Town, South Africa
| | - Jeremy D Woodward
- Electron Microscope Unit, University of Cape Town, Cape Town, South Africa
| | - Edward D Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
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13
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Magalhães FDC, Fernandes T, Bassaneze V, Mattos KC, Schettert I, Marques FLN, Krieger JE, Nava R, Barauna VG, Menezes de Oliveira E. High-volume endurance exercise training stimulates hematopoiesis by increasing ACE NH2-terminal activity. Clin Sci (Lond) 2021; 135:2377-2391. [PMID: 34608942 DOI: 10.1042/cs20210739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/30/2021] [Accepted: 10/05/2021] [Indexed: 11/17/2022]
Abstract
One of the health benefits of endurance exercise training (ET) is the stimulation of hematopoiesis. However, the mechanisms underlying ET-induced hematopoietic adaptations are understudied. N-Acetyl-Seryl-Aspartyl-Lysyl-Proline (Ac-SDKP) inhibits proliferation of early hematopoietic progenitor cells. The angiotensin I-converting enzyme (ACE) NH2-terminal promotes hematopoiesis by inhibiting the anti-hematopoietic effect of Ac-SDKP. Here we demonstrate for the first time the role of ACE NH2-terminal in ET-induced hematopoietic adaptations. Wistar rats were subjected to 10 weeks of moderate-(T1) and high-(T2) volume swimming-training. Although both protocols induced classical ET-associated adaptations, only T2 increased plasma ACE NH2-domain activity (by 40%, P=0.0003) and reduced Ac-SDKP levels (by 50%, P<0.0001). T2 increased the number of hematopoietic stem cells (HSCs; ∼200%, P=0.0008), early erythroid progenitor colonies (∼300%, P<0.0001) and reticulocytes (∼500%, P=0.0007), and reduced erythrocyte lifespan (∼50%, P=0.022). Following, Wistar rats were subjected to T2 or T2 combined with ACE NH2-terminal inhibition (captopril (Cap) treatment: 10 mg.kg-1.day-1). T2 combined with ACE NH2-terminal inhibition prevented Ac-SDKP decrease and attenuated ET-induced hematopoietic adaptations. Altogether, our findings show that ET-induced hematopoiesis was at least partially associated with increased ACE NH2-terminal activity and reduction in the hematopoietic inhibitor Ac-SDKP.
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Affiliation(s)
- Flávio de Castro Magalhães
- Laboratory of Biochemistry of the Motor Activity, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
- Laboratory of Exercise Biology, Integrated Center of Health Research, Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas-Federal University of the Jequitinhonha and Mucuri Valleys, 5000 MGT 367 Road-km 583-Alto da Jacuba, 39100-000, Diamantina, Minas Gerais, Brazil
| | - Tiago Fernandes
- Laboratory of Biochemistry of the Motor Activity, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
| | - Vinícius Bassaneze
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Katt Coelho Mattos
- Laboratory of Biochemistry of the Motor Activity, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
| | - Isolmar Schettert
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Fabio Luiz Navarro Marques
- Radiopharmacy Laboratory, Nuclear Medicine Center, Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - José Eduardo Krieger
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Roberto Nava
- Department of Health, Exercise, and Sports Sciences, University of New Mexico, Albuquerque, NM 87131, U.S.A
| | - Valério Garrone Barauna
- Laboratory of Molecular and Cellular Physiology, Health Sciences Center, Federal University of Espírito Santo, Vitória, Brazil
| | - Edilamar Menezes de Oliveira
- Laboratory of Biochemistry of the Motor Activity, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
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14
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Marzano LAS, de Castro FLM, Machado CA, de Barros JLVM, Macedo E Cordeiro T, Simões E Silva AC, Teixeira AL, Silva de Miranda A. Potential Role of Adult Hippocampal Neurogenesis in Traumatic Brain Injury. Curr Med Chem 2021; 29:3392-3419. [PMID: 34561977 DOI: 10.2174/0929867328666210923143713] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/28/2021] [Accepted: 08/18/2021] [Indexed: 11/22/2022]
Abstract
Traumatic brain injury (TBI) is a serious cause of disability and death among young and adult individuals, displaying complex pathophysiology including cellular and molecular mechanisms that are not fully elucidated. Many experimental and clinical studies investigated the potential relationship between TBI and the process by which neurons are formed in the brain, known as neurogenesis. Currently, there are no available treatments for TBI's long-term consequences being the search for novel therapeutic targets, a goal of highest scientific and clinical priority. Some studies evaluated the benefits of treatments aimed at improving neurogenesis in TBI. In this scenario, herein, we reviewed current pre-clinical studies that evaluated different approaches to improving neurogenesis after TBI while achieving better cognitive outcomes, which may consist in interesting approaches for future treatments.
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Affiliation(s)
- Lucas Alexandre Santos Marzano
- Laboratório Interdisciplinar de Investigação Médica (LIIM), Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Brazil
| | | | - Caroline Amaral Machado
- Laboratório de Neurobiologia, Departamento de Morfologia, Instituto de Ciências Biológicas, UFMG, Brazil
| | | | - Thiago Macedo E Cordeiro
- Laboratório Interdisciplinar de Investigação Médica (LIIM), Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Brazil
| | - Ana Cristina Simões E Silva
- Laboratório Interdisciplinar de Investigação Médica (LIIM), Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Brazil
| | - Antônio Lúcio Teixeira
- Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, University of Texas Health Science Center at Houston, United States
| | - Aline Silva de Miranda
- Laboratório Interdisciplinar de Investigação Médica (LIIM), Faculdade de Medicina, Universidade Federal de Minas Gerais (UFMG), Brazil
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15
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Aydin F, Turkoglu V, Bas Z. Purification and characterization of angiotensin-converting enzyme (ACE) from sheep lung. Mol Biol Rep 2021; 48:4191-4199. [PMID: 34086160 PMCID: PMC8176444 DOI: 10.1007/s11033-021-06432-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 05/21/2021] [Indexed: 01/11/2023]
Abstract
Angiotensin-converting enzyme (ACE, EC 3.4.15.1) in the renin-angiotensin system regulates blood pressure by catalyzing angiotensin I to the vasoconstrictor angiotensin II. In this study, the ACE was purified and characterized from sheep lung. The kinetic properties of the ACE were designated. The inhibition effect of captopril, a specific ACE inhibitor, was determined. ACE was purified from sheep lung using the affinity chromatography method in one step. NHS-activated Sepharose 4 Fast Flow as column filler and lisinopril as a ligand in this method used. The molecular weight and purity of ACE were designated using the SDS-PAGE method. Optimum temperature and optimum pH were found for purified ACE. KM and Vmax values from Lineweaver–Burk charts determined. The inhibition type, IC50, and Ki values of captopril on purified ACE were identified. ACE was 6405-fold purified from sheep lung by affinity chromatography in one step and specific activity was 16871 EU/mg protein. The purity and molecular weight of ACE were found with SDS-PAGE and observed two bands at around 60 kDa and 70 kDa on the gel. Optimum temperature and optimum pH were designated for purified ACE. Optimum temperature and pH were found as 40 °C and pH 7.4, respectively. Vmax and KM values were calculated to be 35.59 (µmol/min).mL−1 and 0.18 mM, respectively. IC50 value of captopril was found as 0.51 nM. The inhibition type of captopril was determined as non-competitive from the Lineweaver–Burk graph and the Ki value was 0.39 nM. As a result, it was observed in this study that the ACE enzyme can be successfully purified from sheep lungs in one step. Also, it was determined that captopril, which is a specific ACE inhibitor, has a significant inhibitory effect with a very low IC50 value of 0.51 nM.
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Affiliation(s)
- Fatih Aydin
- Department of Chemistry, Faculty of Science, Van YüzüncüYıl University, Van, Turkey
| | - Vedat Turkoglu
- Department of Chemistry, Faculty of Science, Van YüzüncüYıl University, Van, Turkey
| | - Zehra Bas
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Van Yüzüncü Yıl University, 65080, Van, Turkey.
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16
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Cantero-Navarro E, Fernández-Fernández B, Ramos AM, Rayego-Mateos S, Rodrigues-Diez RR, Sánchez-Niño MD, Sanz AB, Ruiz-Ortega M, Ortiz A. Renin-angiotensin system and inflammation update. Mol Cell Endocrinol 2021; 529:111254. [PMID: 33798633 DOI: 10.1016/j.mce.2021.111254] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/05/2021] [Accepted: 03/18/2021] [Indexed: 12/12/2022]
Abstract
The most classical view of the renin-angiotensin system (RAS) emphasizes its role as an endocrine regulator of sodium balance and blood pressure. However, it has long become clear that the RAS has pleiotropic actions that contribute to organ damage, including modulation of inflammation. Angiotensin II (Ang II) activates angiotensin type 1 receptors (AT1R) to promote an inflammatory response and organ damage. This represents the pathophysiological basis for the successful use of RAS blockers to prevent and treat kidney and heart disease. However, other RAS components could have a built-in capacity to brake proinflammatory responses. Angiotensin type 2 receptor (AT2R) activation can oppose AT1R actions, such as vasodilatation, but its involvement in modulation of inflammation has not been conclusively proven. Angiotensin-converting enzyme 2 (ACE2) can process Ang II to generate angiotensin-(1-7) (Ang-(1-7)), that activates the Mas receptor to exert predominantly anti-inflammatory responses depending on the context. We now review recent advances in the understanding of the interaction of the RAS with inflammation. Specific topics in which novel information became available recently include intracellular angiotensin receptors; AT1R posttranslational modifications by tissue transglutaminase (TG2) and anti-AT1R autoimmunity; RAS modulation of lymphoid vessels and T lymphocyte responses, especially of Th17 and Treg responses; interactions with toll-like receptors (TLRs), programmed necrosis, and regulation of epigenetic modulators (e.g. microRNAs and bromodomain and extraterminal domain (BET) proteins). We additionally discuss an often overlooked effect of the RAS on inflammation which is the downregulation of anti-inflammatory factors such as klotho, peroxisome proliferator-activated receptor γ co-activator 1α (PGC-1α), transient receptor potential ankyrin 1 (TRPA1), SNF-related serine/threonine-protein kinase (SNRK), serine/threonine-protein phosphatase 6 catalytic subunit (Ppp6C) and n-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP). Both transcription factors, such as nuclear factor κB (NF-κB), and epigenetic regulators, such as miRNAs are involved in downmodulation of anti-inflammatory responses. A detailed analysis of pathways and targets for downmodulation of anti-inflammatory responses constitutes a novel frontier in RAS research.
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Affiliation(s)
- Elena Cantero-Navarro
- Molecular and Cellular Biology in Renal and Vascular Pathology. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain; Red de Investigación Renal (REDINREN), Spain
| | - Beatriz Fernández-Fernández
- Red de Investigación Renal (REDINREN), Spain; Unidad de Diálisis. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain
| | - Adrian M Ramos
- Red de Investigación Renal (REDINREN), Spain; Unidad de Diálisis. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain
| | - Sandra Rayego-Mateos
- Molecular and Cellular Biology in Renal and Vascular Pathology. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain; Red de Investigación Renal (REDINREN), Spain
| | - Raúl R Rodrigues-Diez
- Molecular and Cellular Biology in Renal and Vascular Pathology. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain; Red de Investigación Renal (REDINREN), Spain
| | - María Dolores Sánchez-Niño
- Red de Investigación Renal (REDINREN), Spain; Unidad de Diálisis. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain
| | - Ana B Sanz
- Red de Investigación Renal (REDINREN), Spain; Unidad de Diálisis. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain
| | - Marta Ruiz-Ortega
- Molecular and Cellular Biology in Renal and Vascular Pathology. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain; Red de Investigación Renal (REDINREN), Spain.
| | - Alberto Ortiz
- Red de Investigación Renal (REDINREN), Spain; Unidad de Diálisis. IIS-Fundación Jiménez Díaz-Universidad Autónoma, Madrid, Spain.
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17
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Liu X, Wang Z, Gao Y, Liu C, Wang J, Fang L, Min W, Zhang JL. Molecular dynamics investigation on the interaction of human angiotensin-converting enzyme with tetrapeptide inhibitors. Phys Chem Chem Phys 2021; 23:6685-6694. [PMID: 33710217 DOI: 10.1039/d1cp00172h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Angiotensin-converting enzyme (ACE) is a well-known zinc metalloenzyme whose physiological functions are vital to blood pressure regulation and management of hypertension. The development of more efficient peptide inhibitors is of great significance for the prevention and treatment of hypertension. In this research, molecular dynamics (MD) simulations were implemented to study the specific binding mechanism and interaction between human ACE (hACE) and tetrapeptides, YIHP, YKHP, YLVR, and YRHP. The calculation of relative binding free energy on the one hand verified that YLVR, an experimentally identified inhibitor, has a stronger inhibitory effect and, on the other hand, indicated that YRHP is the "best" inhibitor with the strongest binding affinity. Inspection of atomic interactions discriminated the specific binding mode of each tetrapeptide inhibitor with hACE and explained the difference of their affinity. Moreover, in-depth analysis of the MD production trajectories, including clustering, principal component analysis, and dynamic network analysis, determined the dynamic correlation between tetrapeptides and hACE and obtained the communities' distribution of a protein-ligand complex. The present study provides essential insights into the binding mode and interaction mechanism of the hACE-peptide complex, which paves a path for designing effective anti-hypertensive peptides.
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Affiliation(s)
- Xiaoting Liu
- College of Food Science and Engineering, National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, Jilin, People's Republic of China.
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18
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Saadi S, Ghazali HM, Saari N, Abdulkarim SM. The structural reconformation of peptides in enhancing functional and therapeutic properties: Insights into their solid state crystallizations. Biophys Chem 2021; 273:106565. [PMID: 33780688 DOI: 10.1016/j.bpc.2021.106565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 02/09/2021] [Accepted: 02/19/2021] [Indexed: 01/05/2023]
Abstract
Therapeutic peptides derived proteins with alpha-reconformation states like antibody shape have shown potential effects in combating terrible diseases linked with earlier signs of angiogensis, mutagenesis and transgenesis. Alpha reconformation in material design refers to the folding of the peptide chains and their transitions under reversible chemical bonds of disulfide chemical bridges and further non-covalence lesions. Thus, the rational design of signal peptides into alpha-helix is intended in increasing the defending effects of peptides into cores like adjuvant antibiotic and/or vaccines. Thereby, the signal peptides are able in displaying multiple eradicating regions by changing crystal-depositions and deviation angles. These types of molecular structures could have multiple advantages in tracing disease syndromes and impurities by increasing the host defense against the fates of pathogens and viruses, eventually leading to the loss in signaling by increasing peptide susceptibility levels to folding and unfolding and therefore, formation of transgenic peptide models. Alpha reconformation peptides is aimed in triggering as well as other regulatory functions such as remodulating metabolic chain disorders of lipolysis and glucolysis by increasing the insulin and leptin resistance for best lipid storages and lipoprotein density distributions.
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Affiliation(s)
- Sami Saadi
- Institut de la Nutrition, de l'Alimentation et des Technologies Agro-alimentaires INATAA 25017, Université Frères Mentouri, Constantine 1, Algeria; Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Hasanah Mohd Ghazali
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Nazamid Saari
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Sabo Mohammed Abdulkarim
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Lubbe L, Cozier GE, Oosthuizen D, Acharya KR, Sturrock ED. ACE2 and ACE: structure-based insights into mechanism, regulation and receptor recognition by SARS-CoV. Clin Sci (Lond) 2020; 134:2851-71. [PMID: 33146371 DOI: 10.1042/CS20200899] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 12/21/2022]
Abstract
Angiotensin converting enzyme (ACE) is well-known for its role in blood pressure regulation via the renin–angiotensin aldosterone system (RAAS) but also functions in fertility, immunity, haematopoiesis and diseases such as obesity, fibrosis and Alzheimer’s dementia. Like ACE, the human homologue ACE2 is also involved in blood pressure regulation and cleaves a range of substrates involved in different physiological processes. Importantly, it is the functional receptor for severe acute respiratory syndrome (SARS)-coronavirus (CoV)-2 responsible for the 2020, coronavirus infectious disease 2019 (COVID-19) pandemic. Understanding the interaction between SARS-CoV-2 and ACE2 is crucial for the design of therapies to combat this disease. This review provides a comparative analysis of methodologies and findings to describe how structural biology techniques like X-ray crystallography and cryo-electron microscopy have enabled remarkable discoveries into the structure–function relationship of ACE and ACE2. This, in turn, has enabled the development of ACE inhibitors for the treatment of cardiovascular disease and candidate therapies for the treatment of COVID-19. However, despite these advances the function of ACE homologues in non-human organisms is not yet fully understood. ACE homologues have been discovered in the tissues, body fluids and venom of species from diverse lineages and are known to have important functions in fertility, envenoming and insect–host defence mechanisms. We, therefore, further highlight the need for structural insight into insect and venom ACE homologues for the potential development of novel anti-venoms and insecticides.
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Qiu Y, Wang Z, Zhang X, Huang P, Zhang W, Zhang K, Wang S, He L, Guo Y, Xiang A, Zhang C, Hao Q, Li M, Li W, Zhang Y. A long-acting isomer of Ac-SDKP attenuates pulmonary fibrosis through SRPK1-mediated PI3K/AKT and Smad2 pathway inhibition. IUBMB Life 2020; 72:2611-2626. [PMID: 33135306 DOI: 10.1002/iub.2389] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/12/2020] [Accepted: 09/14/2020] [Indexed: 01/12/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive, life-threatening lung disease with a poor prognosis. N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP) is a critical negative regulator of fibrosis development. However, it's extremely short half-life greatly limits its applications. Previously, we reported an Ac-SDKP analog peptide in which Asp and Lys residues were replaced with D-amino acids (Ac-SDD KD P). Ac-SDD KD P exhibits better resistance to angiotensin-1-converting enzyme (ACE)-mediated degradation and a longer half-life than Ac-SDKP in rat and human sera. The objective of this study was to explore the potential application of Ac-SDD KD P for the treatment of IPF and to clarify the underlying mechanisms. We found that Ac-SDD KD P exerted similar antifibrotic effects as Ac-SDKP on human fetal lung fibroblast-1 (HFL-1) proliferation, α-smooth muscle actin (α-SMA), collagen I and collagen III expression, and Smad-2 phosphorylation in vitro. In vivo, Ac-SDD KD P exhibited significantly greater protective effects against bleomycin-induced pulmonary fibrosis than Ac-SDKP in mice. α-SMA, CD45, collagen I and collagen III expression, and Smad-2 phosphorylation were significantly decreased in the lungs of Ac-SDD KD P-treated but not Ac-SDKP-treated mice. Furthermore, a pull-down experiment was used to screen for molecules that interact with Ac-SDKP. Co-immunoprecipitation (Co-IP) and computer-based molecular docking experiments demonstrated an interaction between Ac-SDKP or Ac-SDD KD P (Ac-SDKP/Ac-SDD KD P) and serine/arginine-rich protein-specific kinase 1 (SRPK1) that caused inhibition SRPK1-mediated phosphatidylinositol-3 kinase/ serine/threonine kinase (PIK3/AKT) signaling pathway activation and Smad2 phosphorylation and thereby attenuated lung fibrosis. Our data suggest that long-acting Ac-SDD KD P may potentially be an effective drug for the treatment of pulmonary fibrosis. The interacting molecule and antifibrotic mechanism of Ac-SDKP/Ac-SDD KD P were also identified, providing an experimental and theoretical foundation for the clinical application of the drug.
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Affiliation(s)
- Yueyuan Qiu
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Zhaowei Wang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Xutao Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Ping Huang
- The Brigade of Undergraduates, The Fourth Military Medical University, Xi'an, China
| | - Wangqian Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Kuo Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Shuning Wang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Lei He
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Yanhai Guo
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - An Xiang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Cun Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Qiang Hao
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Meng Li
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Weina Li
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Yingqi Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, Fourth Military Medical University, Xi'an, China
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21
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Cozier GE, Lubbe L, Sturrock ED, Acharya KR. Angiotensin-converting enzyme open for business: structural insights into the subdomain dynamics. FEBS J 2020; 288:2238-2256. [PMID: 33067882 PMCID: PMC8048788 DOI: 10.1111/febs.15601] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/01/2020] [Accepted: 10/14/2020] [Indexed: 12/17/2022]
Abstract
Angiotensin‐1‐converting enzyme (ACE) is a key enzyme in the renin–angiotensin–aldosterone and kinin systems where it cleaves angiotensin I and bradykinin peptides, respectively. However, ACE also participates in numerous other physiological functions, can hydrolyse many peptide substrates and has various exo‐ and endopeptidase activities. ACE achieves this complexity by containing two homologous catalytic domains (N‐ and C‐domains), which exhibit different substrate specificities. Here, we present the first open conformation structures of ACE N‐domain and a unique closed C‐domain structure (2.0 Å) where the C terminus of a symmetry‐related molecule is observed inserted into the active‐site cavity and binding to the zinc ion. The open native N‐domain structure (1.85 Å) enables comparison with ACE2, a homologue previously observed in open and closed states. An open S2_S′‐mutant N‐domain structure (2.80 Å) includes mutated residues in the S2 and S′ subsites that effect ligand binding, but are distal to the binding site. Analysis of these structures provides important insights into how structural features of the ACE domains are able to accommodate the wide variety of substrates and allow different peptidase activities. Database The atomic coordinates and structure factors for Open nACE, Open S2_S′‐nACE and Native G13‐cACE structures have been deposited with codes 6ZPQ, 6ZPT and 6ZPU, respectively, in the RCSB Protein Data Bank, www.pdb.org
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Affiliation(s)
- Gyles E Cozier
- Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Lizelle Lubbe
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Edward D Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - K Ravi Acharya
- Department of Biology and Biochemistry, University of Bath, Bath, UK
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22
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Cozier GE, Lubbe L, Sturrock ED, Acharya KR. ACE-domain selectivity extends beyond direct interacting residues at the active site. Biochem J 2020; 477:1241-59. [PMID: 32195541 DOI: 10.1042/BCJ20200060] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/16/2020] [Accepted: 03/19/2020] [Indexed: 12/31/2022]
Abstract
Angiotensin-converting enzyme (ACE) is best known for its formation of the vasopressor angiotensin II that controls blood pressure but is also involved in other physiological functions through the hydrolysis of a variety of peptide substrates. The enzyme contains two catalytic domains (nACE and cACE) that have different affinities for ACE substrates and inhibitors. We investigated whether nACE inhibitor backbones contain a unique property which allows them to take advantage of the hinging of nACE. Kinetic analysis showed that mutation of unique nACE residues, in both the S2 pocket and around the prime subsites (S′) to their C-domain counterparts, each resulted in a decrease in the affinity of nACE specific inhibitors (SG6, 33RE and ketoACE-13) but it required the combined S2_S′ mutant to abrogate nACE-selectivity. However, this was not observed with the non-domain-selective inhibitors enalaprilat and omapatrilat. High-resolution structures were determined for the minimally glycosylated nACE with the combined S2_S′ mutations in complex with the ACE inhibitors 33RE (1.8 Å), omapatrilat (1.8 Å) and SG6 (1.7 Å). These confirmed that the affinities of the nACE-selective SG6, 33RE and ketoACE-13 are not only affected by direct interactions with the immediate environment of the binding site, but also by more distal residues. This study provides evidence for a more general mechanism of ACE inhibition involving synergistic effects of not only the S2, S1′ and S2′ subsites, but also residues involved in the sub-domain interface that effect the unique ways in which the two domains stabilize active site loops to favour inhibitor binding.
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23
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Li Z, Wang Y, Cheng Y. Mass Spectrometry-Sensitive Probes Coupled with Direct Analysis in Real Time for Simultaneous Sensing of Chemical and Biological Properties of Botanical Drugs. Anal Chem 2019; 91:9001-9009. [DOI: 10.1021/acs.analchem.9b01251] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Zhenhao Li
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
- Zhejiang Engineering Research Center of Rare Medicinal Plants, Wuyi 321200, China
| | - Yi Wang
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
| | - Yiyu Cheng
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
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24
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Abstract
Somatic angiotensin converting enzyme (sACE) is well-known for its role in blood pressure regulation and consequently, ACE inhibitors are widely prescribed for the treatment of hypertension. More than 60 years after the discovery of sACE, however, the molecular details of its substrate hydrolysis and inhibition are still poorly understood. Isothermal titration calorimetry, molecular dynamics simulations and fine epitope mapping suggest that substrate or inhibitor binding triggers a hinging motion between the two subdomains of each domain. Ligand binding to one domain further induces a conformational change in sACE to negatively affect the second domain's function and can also cause dimerization between sACE molecules. This has been linked to an increase in sACE expression via intracellular signalling. Inhibitor-induced dimerization could thus decrease the efficacy of hypertension treatment. At present, the only structural information available for sACE are crystal structures of the truncated domains in the closed conformation due to the presence of ligands. These structures do not provide any information regarding the open active site conformation prior to ligand binding, the relative orientation of the two domains in full-length sACE, or the dimerization interface. To guarantee effective therapeutic intervention, further research is required to investigate the hinging, negative cooperativity and dimerization of sACE. This review describes our current understanding of these interactions and proposes how recent advances in cryo-electron microscopy could enable structural elucidation of their mechanisms.
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Affiliation(s)
- Lizelle Lubbe
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town, 7925, South Africa
| | - Edward D Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town, 7925, South Africa.
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25
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Polakovičová M, Jampílek J. Advances in Structural Biology of ACE and Development of Domain Selective ACE-inhibitors. Med Chem 2019; 15:574-587. [PMID: 31084594 DOI: 10.2174/1573406415666190514081132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 02/19/2019] [Accepted: 04/28/2019] [Indexed: 01/03/2023]
Abstract
BACKGROUND The Angiotensin-I converting enzyme (ACE) is one of the most important components of the renin-angiotensin-aldosterone system controlling blood pressure and renal functions. Inhibitors of ACE are first line therapeutics used in the treatment of hypertension and related cardiovascular diseases. Somatic ACE consists of two homologous catalytic domains, the C- and N-domains. Recent findings have shown that although both domains are highly homologous in structure, they may have different physiological functions. The C-domain is primarily involved in the control of blood pressure, in contrast to the N-domain that is engaged in the regulation of hematopoietic stem cell proliferation. The currently available ACE inhibitors have some adverse effects that can be attributed to the non-selective inhibition of both domains. In addition, specific Ndomain inhibitors have emerged as potential antifibrotic drugs. Therefore, ACE is still an important drug target for the development of novel domain-selective drugs not only for the cardiovascular system but also for other systems. OBJECTIVE Detailed structural information about interactions in the protein-ligand complex is crucial for rational drug design. This review highlights the structural information available from crystallographic data which is essential for the development of domain selective inhibitors of ACE. METHODS Over eighty crystal complexes of ACE are placed into the Protein Database. An overview of X-ray ACE complexes with various inhibitors in C- and N-domains and an analysis of their binding mode have given mechanistic explanation of the structural determinants of selective ligand binding. In addition, ACE domain selective inhibitors with dual modes of action in complexes with ACE are also discussed. CONCLUSION Selectivity of ACE inhibitors for the N- and C-domain is controlled by subtle differences in the amino-acids forming the active site. Reported studies of crystal complexes of inhibitors in the C- and N-domains revealed that most selective inhibitors interact with non-conserved amino-acids between domains and have distinct interactions with the residues in the S2 and S2' subsites of the ACE catalytic site. Moreover, unusual binding of the second molecule of inhibitors in the binding cavity opens new possibilities of exploiting more distant regions of the catalytic center in structure-based design of novel drugs.
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Affiliation(s)
- Mája Polakovičová
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University in Bratislava, Odbojarov 10, SK-83232 Bratislava, Slovakia
| | - Josef Jampílek
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Slechtitelu 27, CZ-78371 Olomouc, Czech Republic.,Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, SK-84215 Bratislava, Slovakia
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26
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Zhang X, Zhou J, Zhu Y, He L, Pang Z, Wang Z, Xu C, Zhang C, Hao Q, Li W, Zhang W, Zhang Y, Li M. d-amino acid modification protects N-Acetyl-seryl-aspartyl-lysyl-proline from physiological hydroxylation and increases its antifibrotic effects on hepatic fibrosis. IUBMB Life 2019; 71:1302-1312. [PMID: 30900390 DOI: 10.1002/iub.2037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 03/07/2019] [Indexed: 01/29/2023]
Abstract
N-Acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP) is a critical negative regulator of fibrosis development in the liver. However, its extremely short half-life in vivo greatly compromises its potential applications. Here, we report an Ac-SDKP analog peptide with d-amino acid replacement (Ac-SDD KD P). The stability of Ac-SDD KD P and its prevention of liver fibrosis were investigated in vitro and in vivo. The stabilities of Ac-SDKP and Ac-SDD KD P exposed to angiotensin-1-converting enzyme (ACE) and their half-lives in rats and human sera were determined by high-performance liquid chromatography. The inhibitory effects of Ac-SDKP and Ac-SDD KD P on the proliferation and activation of hepatic stellate cells (HSC-T6) were evaluated using the Cell Counting Kit-8, Western blotting, reverse transcription quantitative polymerase chain reaction, and immunofluorescence assays. Finally, the protective effects of Ac-SDKP and Ac-SDD KD P on carbon tetrachloride (CCl4 )-induced liver fibrosis in rats were compared. d-Amino acid replacement significantly enhanced the stability of the peptide to ACE and prolonged the half-life of Ac-SDKP in rats and human sera. The Ac-SDKP-mediated inhibition of HSC-T6 cell proliferation was well preserved, and Ac-SDD KD P exerted inhibitory effects comparable to Ac-SDKP on α-smooth muscle actin (α-SMA), collagen I and III expression, and phosphorylated-Smad-2 expression. After intraperitoneal (i.p.) administration, Ac-SDD KD P exhibited significantly greater protection than Ac-SDKP against CCl4 -induced liver fibrosis in rats. The serum alanine aminotransferase, aspartate aminotransferase, albumin, and total protein levels of the Ac-SDD KD P-treated rats were significantly lower than those of the Ac-SDKP-treated rats. α-SMA, CD45, and collagen I and III expression, as well as Smad-2 phosphorylation were significantly attenuated in the livers of the Ac-SDD KD P-treated rats compared to those of the Ac-SDKP-treated rats. Furthermore, we showed that the Ac-SDD KD P concentration in the rat liver increased to a physiological level of 60 min after i.p. administration, although i.p. administration of Ac-SDKP failed to enhance the peptide concentration in the rat liver. Our findings indicate that d-amino acid replacement is a simple and effective method to enhance the stability of Ac-SDKP. Ac-SDD KD P represents potential application of Ac-SDKP in fibrosis treatment and provides a new potential treatment strategy for liver fibrosis. © 2019 IUBMB Life, 71(9):1302-1312, 2019.
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Affiliation(s)
- Xutao Zhang
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Jiming Zhou
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China.,Department of Cardiology, 988 Central Hospital of People's Liberation Army, Zhengzhou, China
| | - Yichao Zhu
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China.,The Brigade of Undergraduates, The Fourth Military Medical University, Xi'an, China
| | - Lei He
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Zhijun Pang
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Zhaowei Wang
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Chuanyang Xu
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Cun Zhang
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Qiang Hao
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Weina Li
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Wei Zhang
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Yingqi Zhang
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
| | - Meng Li
- Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xian, China
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27
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Ames MK, Atkins CE, Pitt B. The renin-angiotensin-aldosterone system and its suppression. J Vet Intern Med 2019; 33:363-382. [PMID: 30806496 PMCID: PMC6430926 DOI: 10.1111/jvim.15454] [Citation(s) in RCA: 201] [Impact Index Per Article: 40.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 01/30/2019] [Indexed: 12/11/2022] Open
Abstract
Chronic activation of the renin-angiotensin-aldosterone system (RAAS) promotes and perpetuates the syndromes of congestive heart failure, systemic hypertension, and chronic kidney disease. Excessive circulating and tissue angiotensin II (AngII) and aldosterone levels lead to a pro-fibrotic, -inflammatory, and -hypertrophic milieu that causes remodeling and dysfunction in cardiovascular and renal tissues. Understanding of the role of the RAAS in this abnormal pathologic remodeling has grown over the past few decades and numerous medical therapies aimed at suppressing the RAAS have been developed. Despite this, morbidity from these diseases remains high. Continued investigation into the complexities of the RAAS should help clinicians modulate (suppress or enhance) components of this system and improve quality of life and survival. This review focuses on updates in our understanding of the RAAS and the pathophysiology of AngII and aldosterone excess, reviewing what is known about its suppression in cardiovascular and renal diseases, especially in the cat and dog.
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Affiliation(s)
- Marisa K Ames
- Department of Clinical Sciences, College of Veterinary Medicine, Colorado State University, Fort Collins, Colorado
| | - Clarke E Atkins
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Bertram Pitt
- Department of Medicine, University of Michigan School of Medicine, Ann Arbor, Michigan
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28
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Abstract
Metalloenzymes are central to a wide range of essential biological activities, including nucleic acid modification, protein degradation, and many others. The role of metalloenzymes in these processes also makes them central for the progression of many diseases and, as such, makes metalloenzymes attractive targets for therapeutic intervention. Increasing awareness of the role metalloenzymes play in disease and their importance as a class of targets has amplified interest in the development of new strategies to develop inhibitors and ultimately useful drugs. In this Review, we provide a broad overview of several drug discovery efforts focused on metalloenzymes and attempt to map out the current landscape of high-value metalloenzyme targets.
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Affiliation(s)
- Allie Y Chen
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Rebecca N Adamek
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Benjamin L Dick
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Cy V Credille
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Christine N Morrison
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - Seth M Cohen
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
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29
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Cozier GE, Arendse LB, Schwager SL, Sturrock ED, Acharya KR. Molecular Basis for Multiple Omapatrilat Binding Sites within the ACE C-Domain: Implications for Drug Design. J Med Chem 2018; 61:10141-10154. [PMID: 30372620 DOI: 10.1021/acs.jmedchem.8b01309] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Omapatrilat was designed as a vasopeptidase inhibitor with dual activity against the zinc metallopeptidases angiotensin-1 converting enzyme (ACE) and neprilysin (NEP). ACE has two homologous catalytic domains (nACE and cACE), which exhibit different substrate specificities. Here, we report high-resolution crystal structures of omapatrilat in complex with nACE and cACE and show omapatrilat has subnanomolar affinity for both domains. The structures show nearly identical binding interactions for omapatrilat in each domain, explaining the lack of domain selectivity. The cACE complex structure revealed an omapatrilat dimer occupying the cavity beyond the S2 subsite, and this dimer had low micromolar inhibition of nACE and cACE. These results highlight residues beyond the S2 subsite that could be exploited for domain selective inhibition. In addition, it suggests the possibility of either domain specific allosteric inhibitors that bind exclusively to the nonprime cavity or the potential for targeting specific substrates rather than completely inhibiting the enzyme.
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Affiliation(s)
- Gyles E Cozier
- Department of Biology and Biochemistry , University of Bath , Claverton Down , Bath BA2 7AY , United Kingdom
| | - Lauren B Arendse
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine , University of Cape Town , Observatory , 7925 Cape Town , Republic of South Africa
| | - Sylva L Schwager
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine , University of Cape Town , Observatory , 7925 Cape Town , Republic of South Africa
| | - Edward D Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine , University of Cape Town , Observatory , 7925 Cape Town , Republic of South Africa
| | - K Ravi Acharya
- Department of Biology and Biochemistry , University of Bath , Claverton Down , Bath BA2 7AY , United Kingdom
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30
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Kumar N, Yin C. The anti-inflammatory peptide Ac-SDKP: Synthesis, role in ACE inhibition, and its therapeutic potential in hypertension and cardiovascular diseases. Pharmacol Res 2018; 134:268-79. [DOI: 10.1016/j.phrs.2018.07.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/12/2018] [Accepted: 07/07/2018] [Indexed: 01/27/2023]
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31
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Alves CR, Fernandes T, Lemos JR, Magalhães FDC, Trombetta IC, Alves GB, Mota GDFAD, Dias RG, Pereira AC, Krieger JE, Negrão CE, Oliveira EM. Aerobic exercise training differentially affects ACE C- and N-domain activities in humans: Interactions with ACE I/D polymorphism and association with vascular reactivity. J Renin Angiotensin Aldosterone Syst 2018; 19:1470320318761725. [PMID: 29629833 PMCID: PMC5894927 DOI: 10.1177/1470320318761725] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Introduction: Previous studies have linked angiotensin-converting enzyme (ACE) insertion (I)/deletion (D) polymorphism (II, ID and DD) to physical performance. Moreover, ACE has two catalytic domains: NH2 (N) and COOH (C) with distinct functions, and their activity has been found to be modulated by ACE polymorphism. The aim of the present study is to investigate the effects of the interaction between aerobic exercise training (AET) and ACE I/D polymorphism on ACE N- and C-domain activities and vascular reactivity in humans. Materials and methods: A total of 315 pre-selected healthy males were genotyped for II, ID and DD genotypes. Fifty completed the full AET (II, n = 12; ID, n = 25; and DD, n = 13), performed in three 90-minute sessions weekly, in the four-month exercise protocol. Pre- and post-training resting heart rate (HR), peak O2 consumption (VO2 peak), mean blood pressure (MBP), forearm vascular conduction (FVC), total circulating ACE and C- and N-domain activities were assessed. One-way ANOVA and two-way repeated-measures ANOVA were used. Results: In pre-training, all variables were similar among the three genotypes. In post-training, a similar increase in FVC (35%) was observed in the three genotypes. AET increased VO2 peak similarly in II, ID and DD (49±2 vs. 57±1; 48±1 vs. 56±3; and 48±5 vs. 58±2 ml/kg/min, respectively). Moreover, there were no changes in HR and MBP. The DD genotype was also associated with greater ACE and C-domain activities at pre- and post-training when compared to II. AET decreased similarly the total ACE and C-domain activities in all genotypes, while increasing the N-domain activity in the II and DD genotypes. However, interestingly, the measurements of N-domain activity after training indicate a greater activity than the other genotypes. These results suggest that the vasodilation in response to AET may be associated with the decrease in total ACE and C-domain activities, regardless of genotype, and that the increase in N-domain activity is dependent on the DD genotype. Conclusions: AET differentially affects the ACE C- and N-domain activities, and the N-domain activity is dependent on ACE polymorphism.
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Affiliation(s)
- Cléber Rene Alves
- 1 School of Physical Education and Sport, University of São Paulo, Brazil.,2 Heart Institute (Incor), Medical School, University of São Paulo, Brazil.,3 University Nove de Julho, UNINOVE, São Paulo, Brazil
| | - Tiago Fernandes
- 1 School of Physical Education and Sport, University of São Paulo, Brazil
| | - José Ribeiro Lemos
- 2 Heart Institute (Incor), Medical School, University of São Paulo, Brazil.,3 University Nove de Julho, UNINOVE, São Paulo, Brazil
| | - Flávio de Castro Magalhães
- 1 School of Physical Education and Sport, University of São Paulo, Brazil.,4 Multicentric Program of Post-graduation in Physiological Sciences, Federal University of the Jequitinhonha and Mucuri Valleys, Diamantina, Minas Gerais, Brazil
| | | | | | | | - Rodrigo Gonçalves Dias
- 5 Physical Education Department, Federal University of Maranhão (UFMA), São Luis, Brazil
| | | | | | - Carlos Eduardo Negrão
- 1 School of Physical Education and Sport, University of São Paulo, Brazil.,2 Heart Institute (Incor), Medical School, University of São Paulo, Brazil
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32
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Bernstein KE, Khan Z, Giani JF, Cao DY, Bernstein EA, Shen XZ. Angiotensin-converting enzyme in innate and adaptive immunity. Nat Rev Nephrol 2018; 14:325-36. [PMID: 29578208 DOI: 10.1038/nrneph.2018.15] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Angiotensin-converting enzyme (ACE) - a zinc-dependent dicarboxypeptidase with two catalytic domains - plays a major part in blood pressure regulation by converting angiotensin I to angiotensin II. However, ACE cleaves many peptides besides angiotensin I and thereby affects diverse physiological functions, including renal development and male reproduction. In addition, ACE has a role in both innate and adaptive responses by modulating macrophage and neutrophil function - effects that are magnified when these cells overexpress ACE. Macrophages that overexpress ACE are more effective against tumours and infections. Neutrophils that overexpress ACE have an increased production of superoxide, which increases their ability to kill bacteria. These effects are due to increased ACE activity but are independent of angiotensin II. ACE also affects the display of major histocompatibility complex (MHC) class I and MHC class II peptides, potentially by enzymatically trimming these peptides. Understanding how ACE expression and activity affect myeloid cells may hold great promise for therapeutic manipulation, including the treatment of both infection and malignancy.
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33
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Bernstein KE, Khan Z, Giani JF, Cao DY, Bernstein EA, Shen XZ. Angiotensin-converting enzyme in innate and adaptive immunity. Nat Rev Nephrol 2018; 14:325-336. [PMID: 29578208 DOI: 10.1038/nrneph.2018.15] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Angiotensin-converting enzyme (ACE) - a zinc-dependent dicarboxypeptidase with two catalytic domains - plays a major part in blood pressure regulation by converting angiotensin I to angiotensin II. However, ACE cleaves many peptides besides angiotensin I and thereby affects diverse physiological functions, including renal development and male reproduction. In addition, ACE has a role in both innate and adaptive responses by modulating macrophage and neutrophil function - effects that are magnified when these cells overexpress ACE. Macrophages that overexpress ACE are more effective against tumours and infections. Neutrophils that overexpress ACE have an increased production of superoxide, which increases their ability to kill bacteria. These effects are due to increased ACE activity but are independent of angiotensin II. ACE also affects the display of major histocompatibility complex (MHC) class I and MHC class II peptides, potentially by enzymatically trimming these peptides. Understanding how ACE expression and activity affect myeloid cells may hold great promise for therapeutic manipulation, including the treatment of both infection and malignancy.
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Affiliation(s)
- Kenneth E Bernstein
- Department of Biomedical Sciences, Cedars-Sinai Medical Center.,Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Zakir Khan
- Department of Biomedical Sciences, Cedars-Sinai Medical Center
| | - Jorge F Giani
- Department of Biomedical Sciences, Cedars-Sinai Medical Center.,Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Duo-Yao Cao
- Department of Biomedical Sciences, Cedars-Sinai Medical Center
| | | | - Xiao Z Shen
- Department of Physiology, Zhejiang University School of Medicine, Hangzhou, China
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34
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Abstract
Proteomic surveys with top-down platforms are today revealing thousands of naturally occurring fragments of bigger proteins. Some of them have not functional meaning because they derive from pathways responsible for protein degradation, but many have specific functions, often completely different from that one of the parent proteins. These peptides encrypted in the protein sequence are nowadays called cryptides. They are frequent in the animal and plant kingdoms and represent a new interesting -omic field of investigation. To point out how much widespread is their presence, we describe here the most studied cryptides from very common sources such as serum albumin, immunoglobulins, hemoglobin, and from saliva and milk proteins. Given its vastness, it is unfeasible to cover the topic exhaustively, therefore only several selected examples of cryptides from other sources are thereafter reported. Demanding is the development of new -omic platforms for the functional screening of new cryptides, which could provide suggestion for peptides and peptido-mimetics with variegate fields of application.
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Affiliation(s)
- Federica Iavarone
- a Istituto di Biochimica e Biochimica Clinica, Università Cattolica , Roma , Italy
| | - Claudia Desiderio
- b Istituto di Chimica del Riconoscimento Molecolare, CNR , Roma , Italy
| | - Alberto Vitali
- b Istituto di Chimica del Riconoscimento Molecolare, CNR , Roma , Italy
| | - Irene Messana
- b Istituto di Chimica del Riconoscimento Molecolare, CNR , Roma , Italy
| | - Claudia Martelli
- a Istituto di Biochimica e Biochimica Clinica, Università Cattolica , Roma , Italy
| | - Massimo Castagnola
- a Istituto di Biochimica e Biochimica Clinica, Università Cattolica , Roma , Italy.,b Istituto di Chimica del Riconoscimento Molecolare, CNR , Roma , Italy
| | - Tiziana Cabras
- c Dipartimento di Scienze della Vita e dell'Ambiente , Università di Cagliari , Cagliari , Italy
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Sharifi N, Khajeh K, Mahernia S, Balalaie S, Ataie G, Jahanbani R, Amanlou M. Probing Angiotensin Converting Enzyme (ACE) Domain-Dependent Inhibition of Onopordia, Isolated from Onopordon acanthium L., Using a Continuous Fluorescent Assay. Pharm Sci 2018. [DOI: 10.15171/ps.2018.06] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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36
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Cozier GE, Schwager SL, Sharma RK, Chibale K, Sturrock ED, Acharya KR. Crystal structures of sampatrilat and sampatrilat-Asp in complex with human ACE - a molecular basis for domain selectivity. FEBS J 2018; 285:1477-1490. [PMID: 29476645 PMCID: PMC5947662 DOI: 10.1111/febs.14421] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/18/2018] [Accepted: 02/20/2018] [Indexed: 11/28/2022]
Abstract
Angiotensin‐1‐converting enzyme (ACE) is a zinc metallopeptidase that consists of two homologous catalytic domains (known as nACE and cACE) with different substrate specificities. Based on kinetic studies it was previously reported that sampatrilat, a tight‐binding inhibitor of ACE, Ki = 13.8 nm and 171.9 nm for cACE and nACE respectively [Sharma et al., Journal of Chemical Information and Modeling (2016), 56, 2486–2494], was 12.4‐fold more selective for cACE. In addition, samAsp, in which an aspartate group replaces the sampatrilat lysine, was found to be a nonspecific and lower micromolar affinity inhibitor. Here, we report a detailed three‐dimensional structural analysis of sampatrilat and samAsp binding to ACE using high‐resolution crystal structures elucidated by X‐ray crystallography, which provides a molecular basis for differences in inhibitor affinity and selectivity for nACE and cACE. The structures show that the specificity of sampatrilat can be explained by increased hydrophobic interactions and a H‐bond from Glu403 of cACE with the lysine side chain of sampatrilat that are not observed in nACE. In addition, the structures clearly show a significantly greater number of hydrophilic and hydrophobic interactions with sampatrilat compared to samAsp in both cACE and nACE consistent with the difference in affinities. Our findings provide new experimental insights into ligand binding at the active site pockets that are important for the design of highly specific domain selective inhibitors of ACE. Database The atomic coordinates and structure factors for N‐ and C‐domains of ACE bound to sampatrilat and sampatrilat‐Asp complexes (6F9V, 6F9R, 6F9T and 6F9U respectively) have been deposited in the Protein Data Bank, Research Collaboratory for Structural Bioinformatics, Rutgers University, New Brunswick, NJ (http://www.rcsb.org/).
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Affiliation(s)
- Gyles E Cozier
- Department of Biology and Biochemistry, University of Bath, UK
| | - Sylva L Schwager
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - Rajni K Sharma
- South African Medical Research Council Drug Discovery and Development Research Unit, Department of Chemistry and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - Kelly Chibale
- South African Medical Research Council Drug Discovery and Development Research Unit, Department of Chemistry and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - Edward D Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - K Ravi Acharya
- Department of Biology and Biochemistry, University of Bath, UK
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Conte E, Fagone E, Gili E, Fruciano M, Iemmolo M, Pistorio MP, Impellizzeri D, Cordaro M, Cuzzocrea S, Vancheri C. Preventive and therapeutic effects of thymosin β4 N-terminal fragment Ac-SDKP in the bleomycin model of pulmonary fibrosis. Oncotarget 2017; 7:33841-54. [PMID: 27029074 PMCID: PMC5085123 DOI: 10.18632/oncotarget.8409] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 03/04/2016] [Indexed: 12/20/2022] Open
Abstract
In this study, the bleomycin model of pulmonary fibrosis was utilized to investigate putative anti-fibrotic activity of Ac-SDKP in vivo. Male CD-1 mice received intra-tracheal bleomycin (BLEO, 1 mg/kg) instillation in the absence or presence of Ac-SDKP (a dose of 0.6 mg/kg delivered intra-peritoneally on the day of BLEO treatment, d0, followed by bi-weekly additional doses). To evaluate therapeutic effects in a subset of mice, Ac-SDKP was administered one week after BLEO instillation (d7). Animals were sacrificed at one, two, or three weeks later. Measurement of fluid and collagen content in the lung, Broncho Alveolar Lavage Fluid (BALF) analysis, lung histology, immunohistochemistry (IHC), and molecular analysis were performed. Compared to BLEO-treated mice, animals that received also Ac-SDKP (at both d0 and d7) had significantly decreased mortality, weight loss, inflammation (edema, and leukocyte lung infiltration), lung damage (histological evidence of lung injury), and fibrosis (collagen histological staining and soluble collagen content in the lung) at up to 21 days. Moreover, IHC and quantitative RT-PCR results demonstrated a significant decrease in BLEO-induced IL-17 and TGF-β expression in lung tissue. Importantly, α-SMA expression, the hallmark of myofibroblast differentiation, was also decreased. This is the first report showing not only a preventive protective role of Ac-SDKP but also its significant therapeutic effects in the bleomycin model of pulmonary fibrosis, thus supporting further preclinical and clinical studies.
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Affiliation(s)
- Enrico Conte
- Department of Clinical and Experimental Medicine, University of Catania, 95124 Catania, Italy
| | - Evelina Fagone
- Department of Clinical and Experimental Medicine, University of Catania, 95124 Catania, Italy
| | - Elisa Gili
- Department of Clinical and Experimental Medicine, University of Catania, 95124 Catania, Italy
| | - Mary Fruciano
- Department of Clinical and Experimental Medicine, University of Catania, 95124 Catania, Italy
| | - Maria Iemmolo
- Department of Clinical and Experimental Medicine, University of Catania, 95124 Catania, Italy
| | | | - Daniela Impellizzeri
- Department of Clinical and Experimental Medicine and Pharmacology, School of Medicine, University of Messina, 98166 Messina, Italy
| | - Marika Cordaro
- Department of Clinical and Experimental Medicine and Pharmacology, School of Medicine, University of Messina, 98166 Messina, Italy
| | - Salvatore Cuzzocrea
- Department of Clinical and Experimental Medicine and Pharmacology, School of Medicine, University of Messina, 98166 Messina, Italy
| | - Carlo Vancheri
- Department of Clinical and Experimental Medicine, University of Catania, 95124 Catania, Italy
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38
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Fienberg S, Cozier GE, Acharya KR, Chibale K, Sturrock ED. The Design and Development of a Potent and Selective Novel Diprolyl Derivative That Binds to the N-Domain of Angiotensin-I Converting Enzyme. J Med Chem 2017; 61:344-359. [PMID: 29206036 DOI: 10.1021/acs.jmedchem.7b01478] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Angiotensin-I converting enzyme (ACE) is a zinc metalloprotease consisting of two catalytic domains (N- and C-). Most clinical ACE inhibitor(s) (ACEi) have been shown to inhibit both domains nonselectively, resulting in adverse effects such as cough and angioedema. Selectively inhibiting the individual domains is likely to reduce these effects and potentially treat fibrosis in addition to hypertension. ACEi from the GVK Biosciences database were inspected for possible N-domain selective binding patterns. From this set, a diprolyl chemical series was modeled using docking simulations. The series was expanded based on key target interactions involving residues known to impart N-domain selectivity. In total, seven diprolyl compounds were synthesized and tested for N-domain selective ACE inhibition. One compound with an aspartic acid in the P2 position (compound 16) displayed potent inhibition (Ki = 11.45 nM) and was 84-fold more selective toward the N-domain. A high-resolution crystal structure of compound 16 in complex with the N-domain revealed the molecular basis for the observed selectivity.
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Affiliation(s)
- Stephen Fienberg
- Department of Chemistry, University of Cape Town , Rondebosch 7701, South Africa
| | - Gyles E Cozier
- Department of Biology and Biochemistry, University of Bath , Claverton Down, Bath BA2 7AY, U.K
| | - K Ravi Acharya
- Department of Biology and Biochemistry, University of Bath , Claverton Down, Bath BA2 7AY, U.K
| | - Kelly Chibale
- Department of Chemistry, University of Cape Town , Rondebosch 7701, South Africa.,Institute of Infectious Disease and Molecular Medicine, University of Cape Town , Observatory 7925, South Africa.,South African Medical Research Council Drug Discovery and Development Research Unit, University of Cape Town , Rondebosch 7701, South Africa
| | - Edward D Sturrock
- Institute of Infectious Disease and Molecular Medicine, University of Cape Town , Observatory 7925, South Africa.,Department of Integrative Biomedical Sciences, University of Cape Town , Observatory 7925, South Africa
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Abstract
Cardiovascular diseases are the leading cause of death. The underlying pathophysiology is largely contributed by an overactivation of the renin-angiotensin-aldosterone-system (RAAS). Herein, angiotensin II (AngII) is a key mediator not only in blood pressure control and vascular tone regulation, but also involved in inflammation, endothelial dysfunction, atherosclerosis, hypertension and congestive heart failure. Since more than three decades suppression of AngII generation by inhibition of the angiotensin-converting enzyme (ACE) or blockade of the AngII-receptor has shown clinical benefit by reducing hypertension, atherosclerosis and other inflammation-associated cardiovascular diseases. Besides pharmaceutical ACE-inhibitors some natural peptides derived from food proteins reduce in vitro ACE activity. Several animal studies and a few human clinical trials have shown antihypertensive effects of such peptides, which might be attractive as food additives to prevent age-related RAAS activation. However, their inhibitory potency on in vitro ACE activity does not always correlate with an antihypertensive impact. While some peptides with high inhibitory activity on ACE-activity in vitro show no antihypertensive effect in vivo, other peptides with only a moderate ACE inhibitory activity in vitro cause such effects. The explanation for this conflicting phenomenon between inhibitory activity and antihypertensive effect remains unclear to date. This review shall critically address the effects of natural peptides derived from different food proteins on the cardiovascular system and the possible underlying mechanisms. A central aspect will be to point to conceptual gaps in the current understanding of the action of these peptides with respect to in vivo blood pressure lowering effects.
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Affiliation(s)
- Melanie Martin
- a Institute of Physiology, Medical Faculty Carl Gustav Carus, Technische Universität Dresden , Germany
| | - Andreas Deussen
- a Institute of Physiology, Medical Faculty Carl Gustav Carus, Technische Universität Dresden , Germany
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O'Reilly PJ, Ding Q, Akthar S, Cai G, Genschmer KR, Patel DF, Jackson PL, Viera L, Roda M, Locy ML, Bernstein EA, Lloyd CM, Bernstein KE, Snelgrove RJ, Blalock JE. Angiotensin-converting enzyme defines matrikine-regulated inflammation and fibrosis. JCI Insight 2017; 2:91923. [PMID: 29202450 PMCID: PMC5752376 DOI: 10.1172/jci.insight.91923] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 10/11/2017] [Indexed: 12/11/2022] Open
Abstract
The neutrophil chemoattractant proline-glycine-proline (PGP) is generated from collagen by matrix metalloproteinase-8/9 (MMP-8/9) and prolyl endopeptidase (PE), and it is concomitantly degraded by extracellular leukotriene A4 hydrolase (LTA4H) to limit neutrophilia. Components of cigarette smoke can acetylate PGP, yielding a species (AcPGP) that is resistant to LTA4H-mediated degradation and can, thus, support a sustained neutrophilia. In this study, we sought to elucidate if an antiinflammatory system existed to degrade AcPGP that is analogous to the PGP-LTA4H axis. We demonstrate that AcPGP is degraded through a previously unidentified action of the enzyme angiotensin-converting enzyme (ACE). Pulmonary ACE is elevated during episodes of acute inflammation, as a consequence of enhanced vascular permeability, to ensure the efficient degradation of AcPGP. Conversely, we suggest that this pathway is aberrant in chronic obstructive pulmonary disease (COPD) enabling the accumulation of AcPGP. Consequently, we identify a potentially novel protective role for AcPGP in limiting pulmonary fibrosis and suggest the pathogenic function attributed to ACE in idiopathic pulmonary fibrosis (IPF) to be a consequence of overzealous AcPGP degradation. Thus, AcPGP seemingly has very divergent roles: it is pathogenic in its capacity to drive neutrophilic inflammation and matrix degradation in the context of COPD, but it is protective in its capacity to limit fibrosis in IPF. ACE degrades the collagen-derived matrikine, acetylate proline–glycine–proline, to limit pulmonary inflammation and promote repair.
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Affiliation(s)
- Philip J O'Reilly
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Qiang Ding
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Samia Akthar
- Inflammation Repair and Development, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Guoqiang Cai
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Kristopher R Genschmer
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Dhiren F Patel
- Inflammation Repair and Development, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Patricia L Jackson
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Birmingham V.A. Medical Center, Birmingham, Alabama, USA
| | - Liliana Viera
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Mojtaba Roda
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Science, Faculty of Science, Utrecht University, Utrecht, Netherlands
| | - Morgan L Locy
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ellen A Bernstein
- Department of Biomedical Sciences and Department of Pathology, Cedars-Sinai Medical Centre, Los Angeles, California, USA
| | - Clare M Lloyd
- Inflammation Repair and Development, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Kenneth E Bernstein
- Department of Biomedical Sciences and Department of Pathology, Cedars-Sinai Medical Centre, Los Angeles, California, USA
| | - Robert J Snelgrove
- Inflammation Repair and Development, National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - J Edwin Blalock
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Stević N, Stefanović N, Veličković - Radovanović R, Apostolović B, Paunović K, Cvetković M, Virijević D, Cvetković T. T HE INFLUENCE OF ACE INHIBITORS TREATMENT ON ANEMIA PARAMETERS IN PATIENTS ON MAINTENANCE HEMODIALYSIS. AMM 2017. [DOI: 10.5633/amm.2017.0317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Dos Santos DMRC, de Souza CB, Pereira HJV. Angiotensin converting enzymes in fish venom. Toxicon 2017; 131:63-67. [PMID: 28284848 DOI: 10.1016/j.toxicon.2017.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 02/15/2017] [Accepted: 03/06/2017] [Indexed: 10/20/2022]
Abstract
Animal venoms are multifaceted mixtures, including proteins, peptides and enzymes produced by animals in defense, predation and digestion. These molecules have been investigated concerning their molecular mechanisms associated and possible pharmacological applications. Thalassophryne nattereri is a small venomous fish inhabiting the northern and northeastern coast of Brazil, and represents a relatively frequent cause of injuries. Its venom causes severe inflammatory response followed frequently by the necrosis of the affected area. Scorpaena plumieri is the most venomous fish in the Brazilian fauna and is responsible for relatively frequent accidents involving anglers and bathers. In humans, its venom causes edema, erythema, ecchymoses, nausea, vomiting, and syncope. Recently, the presence of a type of angiotensin converting enzyme (ACE) activity in the venom of Thalassophryne nattereri and Scorpaena plumieri, endemic fishes in northeastern coast of Brazil, has been described. The ACE converts angiotensin I (Ang I) into angiotensin II (Ang II) and inactivates bradykinin, there by regulating blood pressure and electrolyte homeostasis, however, their function in these venoms remains an unknown. This article provides an overview of the current knowledge on ACE in the venoms of Thalassophryne nattereri and Scorpaena plumier.
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Abstract
The renin-angiotensin-aldosterone system (RAAS) is a complex system of enzymes, receptors, and peptides that help to control blood pressure and fluid homeostasis. Techniques in studying the RAAS can be difficult due to such factors as peptide/enzyme stability and receptor localization. This paper gives a brief account of the different components of the RAAS and current methods in measuring each component. There is also a discussion of different methods in measuring stem and immune cells by flow cytometry, hypertension, atherosclerosis, oxidative stress, energy balance, and other RAAS-activated phenotypes. While studies on the RAAS have been performed for over 100 years, new techniques have allowed scientists to come up with new insights into this system. These techniques are detailed in this Methods in Molecular Biology Series and give students new to studying the RAAS the proper controls and technical details needed to perform each procedure.
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Affiliation(s)
- Sean E Thatcher
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Charles T. Wethington Bldg, 593, 900 South Limestone Street, Lexington, KY, 40536, USA.
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da Costa Marques ME, de Araújo Tenório H, dos Santos CWV, dos Santos DM, de Lima ME, Pereira HJV. Angiotensin converting enzyme of Thalassophryne nattereri venom. Int J Biol Macromol 2016; 91:980-6. [DOI: 10.1016/j.ijbiomac.2016.06.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 06/14/2016] [Accepted: 06/16/2016] [Indexed: 12/23/2022]
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Abstract
Liver fibrosis, a major characteristic of chronic liver disease, is inappropriate tissue remodeling caused by prolonged parenchymal cell injury and inflammation. During liver injury, hepatic stellate cells (HSCs) undergo transdifferentiation from quiescent HSCs into activated HSCs, which promote the deposition of extracellular matrix proteins, leading to liver fibrosis. Thymosin beta 4 (Tβ4), a major actin-sequestering protein, is the most abundant member of the highly conserved β-thymosin family and controls cell morphogenesis and motility by regulating the dynamics of the actin cytoskeleton. Tβ4 is known to be involved in various cellular responses, including antiinflammation, wound healing, angiogenesis, and cancer progression. Emerging evidence suggests that Tβ4 is expressed in the liver; however, its biological roles are poorly understood. Herein, we introduce liver fibrogenesis and recent findings regarding the function of Tβ4 in various tissues and discuss the potential role of Tβ4 in liver fibrosis with a special focus on the effects of exogenous and endogenous Tβ4. Recent studies have revealed that activated HSCs express Tβ4 in vivo and in vitro. Treatment with the exogenous Tβ4 peptide inhibits the proliferation and migration of activated HSCs and reduces liver fibrosis, indicating it has an antifibrotic action. Meanwhile, the endogenously expressed Tβ4 in activated HSCs is shown to promote HSCs activation. Although the role of Tβ4 has not been elucidated, it is apparent that Tβ4 is associated with HSC activation. Therefore, understanding the potential roles and regulatory mechanisms of Tβ4 in liver fibrosis may provide a novel treatment for patients.
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46
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Zhang Y, Zhang ZG, Chopp M, Meng Y, Zhang L, Mahmood A, Xiong Y. Treatment of traumatic brain injury in rats with N-acetyl-seryl-aspartyl-lysyl-proline. J Neurosurg 2016; 126:782-795. [PMID: 28245754 DOI: 10.3171/2016.3.jns152699] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
OBJECTIVE The authors' previous studies have suggested that thymosin beta 4 (Tβ4), a major actin-sequestering protein, improves functional recovery after neural injury. N-acetyl-seryl-aspartyl-lysyl-proline (AcSDKP) is an active peptide fragment of Tβ4. Its effect as a treatment of traumatic brain injury (TBI) has not been investigated. Thus, this study was designed to determine whether AcSDKP treatment improves functional recovery in rats after TBI. METHODS Young adult male Wistar rats were randomly divided into the following groups: 1) sham group (no injury); 2) TBI + vehicle group (0.01 N acetic acid); and 3) TBI + AcSDKP (0.8 mg/kg/day). TBI was induced by controlled cortical impact over the left parietal cortex. AcSDKP or vehicle was administered subcutaneously starting 1 hour postinjury and continuously for 3 days using an osmotic minipump. Sensorimotor function and spatial learning were assessed using a modified Neurological Severity Score and Morris water maze tests, respectively. Some of the animals were euthanized 1 day after injury, and their brains were processed for measurement of fibrin accumulation and neuroinflammation signaling pathways. The remaining animals were euthanized 35 days after injury, and brain sections were processed for measurement of lesion volume, hippocampal cell loss, angiogenesis, neurogenesis, and dendritic spine remodeling. RESULTS Compared with vehicle treatment, AcSDKP treatment initiated 1 hour postinjury significantly improved sensorimotor functional recovery (Days 7-35, p < 0.05) and spatial learning (Days 33-35, p < 0.05), reduced cortical lesion volume, and hippocampal neuronal cell loss, reduced fibrin accumulation and activation of microglia/macrophages, enhanced angiogenesis and neurogenesis, and increased the number of dendritic spines in the injured brain (p < 0.05). AcSDKP treatment also significantly inhibited the transforming growth factor-β1/nuclear factor-κB signaling pathway. CONCLUSIONS AcSDKP treatment initiated 1 hour postinjury provides neuroprotection and neurorestoration after TBI, indicating that this small tetrapeptide has promising therapeutic potential for treatment of TBI. Further investigation of the optimal dose and therapeutic window of AcSDKP treatment for TBI and the associated underlying mechanisms is therefore warranted.
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Affiliation(s)
| | | | - Michael Chopp
- Neurology, Henry Ford Hospital, Detroit; and.,Department of Physics, Oakland University, Rochester, Michigan
| | | | - Li Zhang
- Neurology, Henry Ford Hospital, Detroit; and
| | | | - Ye Xiong
- Departments of 1 Neurosurgery and
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Abstract
Angiotensin-converting enzyme (ACE) converts angiotensin I to angiotensin II and degrades bradykinin and other vasoactive peptides. ACE inhibitors are used to treat diseases such as hypertension and heart failure. It is thus highly desirable to understand the catalytic mechanism of ACE, as this should facilitate the design of more powerful and selective ACE inhibitors. ACE exhibits two different active domains, the C-domain and the N-domain. In this work, we systematically investigated the inhibitor- and substrate-binding patterns in the N-domain of human ACE using a combined quantum mechanical and molecular mechanical approach. The hydrolysis of hippuryl-histidyl-leucine (HHL) as catalyzed by the N-domain of human somatic ACE was explored, and the effects of chloride ion on the overall reaction were also investigated. Two models, one with and one without a chloride ion at the first binding position, were then designed to examine the chloride dependence of inhibitor-substrate binding and the catalytic mechanism. Our calculations indicate that the hydrolysis reaction follows a stepwise general base/general acid catalysis path. The estimated mean free energy barrier height in the two models is about 15.6 kcal/mol, which agrees very well with the experimentally estimated value of 15.8 kcal/mol. Our simulations thus suggest that the N-domain is in a mixed form during ACE-catalyzed hydrolysis, with the single-chloride-ion and the double-chloride-ion forms existing simultaneously. Graphical Abstract Superposition of ACE C- and N- domains.
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Affiliation(s)
- Xia Mu
- MOE Key Laboratory of Green Chemistry, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, People's Republic of China
| | - Chunchun Zhang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, People's Republic of China
| | - Dingguo Xu
- MOE Key Laboratory of Green Chemistry, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, People's Republic of China. .,Geonome Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan, 610064, People's Republic of China.
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48
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Larmuth KM, Masuyer G, Douglas RG, Schwager SL, Acharya KR, Sturrock ED. Kinetic and structural characterization of amyloid-β peptide hydrolysis by human angiotensin-1-converting enzyme. FEBS J 2016; 283:1060-76. [PMID: 26748546 PMCID: PMC4950319 DOI: 10.1111/febs.13647] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 12/24/2015] [Accepted: 01/06/2016] [Indexed: 12/25/2022]
Abstract
Angiotensin‐1‐converting enzyme (ACE), a zinc metallopeptidase, consists of two homologous catalytic domains (N and C) with different substrate specificities. Here we report kinetic parameters of five different forms of human ACE with various amyloid beta (Aβ) substrates together with high resolution crystal structures of the N‐domain in complex with Aβ fragments. For the physiological Aβ(1–16) peptide, a novel ACE cleavage site was found at His14‐Gln15. Furthermore, Aβ(1–16) was preferentially cleaved by the individual N‐domain; however, the presence of an inactive C‐domain in full‐length somatic ACE (sACE) greatly reduced enzyme activity and affected apparent selectivity. Two fluorogenic substrates, Aβ(4–10)Q and Aβ(4–10)Y, underwent endoproteolytic cleavage at the Asp7‐Ser8 bond with all ACE constructs showing greater catalytic efficiency for Aβ(4–10)Y. Surprisingly, in contrast to Aβ(1–16) and Aβ(4–10)Q, sACE showed positive domain cooperativity and the double C‐domain (CC‐sACE) construct no cooperativity towards Aβ(4–10)Y. The structures of the Aβ peptide–ACE complexes revealed a common mode of peptide binding for both domains which principally targets the C‐terminal P2′ position to the S2′ pocket and recognizes the main chain of the P1′ peptide. It is likely that N‐domain selectivity for the amyloid peptide is conferred through the N‐domain specific S2′ residue Thr358. Additionally, the N‐domain can accommodate larger substrates through movement of the N‐terminal helices, as suggested by the disorder of the hinge region in the crystal structures. Our findings are important for the design of domain selective inhibitors as the differences in domain selectivity are more pronounced with the truncated domains compared to the more physiological full‐length forms. Database The atomic coordinates and structure factors for N‐domain ACE with Aβ peptides 4–10 (5AM8), 10–16 (5AM9), 1–16 (5AMA), 35–42 (5AMB) and (4–10)Y (5AMC) complexes have been deposited in the Protein Data Bank, Research Collaboratory for Structural Bioinformatics, Rutgers University, New Brunswick, NJ, USA (http://www.rcsb.org/).
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Affiliation(s)
- Kate M Larmuth
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | | | - Ross G Douglas
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - Sylva L Schwager
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - K Ravi Acharya
- Department of Biology and Biochemistry, University of Bath, UK
| | - Edward D Sturrock
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
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49
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Mnguni AT, Engel ME, Borkum MS, Mayosi BM. The Effects of Angiotensin Converting Enzyme Inhibitors (ACE-I) on Human N-Acetyl-Seryl-Aspartyl-Lysyl-Proline (Ac-SDKP) Levels: A Systematic Review and Meta-Analysis. PLoS One 2015; 10:e0143338. [PMID: 26656271 PMCID: PMC4686106 DOI: 10.1371/journal.pone.0143338] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Accepted: 11/03/2015] [Indexed: 11/23/2022] Open
Abstract
Background Tuberculous pericardial effusion is a pro-fibrotic condition that is complicated by constrictive pericarditis in 4% to 8% of cases. N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP) is a ubiquitous tetrapeptide with anti-fibrotic properties that is low in tuberculous pericardial effusion, thus providing a potential mechanism for the heightened fibrotic state. Angiotensin-converting enzyme inhibitors (ACE-I), which increase Ac-SDKP levels with anti-fibrotic effects in animal models, are candidate drugs for preventing constrictive pericarditis if they can be shown to have similar effects on Ac-SDKP and fibrosis in human tissues. Objective To systematically review the effects of ACE-Is on Ac-SDKP levels in human tissues. Methods We searched five electronic databases (1996 to 2014) and conference abstracts with no language restrictions. Two reviewers independently selected studies, extracted data and assessed methodological quality. The protocol was registered in PROSPERO. Results Four studies with a total of 206 participants met the inclusion criteria. Three studies (106 participants) assessed the change in plasma levels of Ac-SDKP following ACE-I administration in healthy humans. The administration of an ACE-I was associated with an increase in Ac-SDKP levels (mean difference (MD) 5.07 pmol/ml (95% confidence intervals (CI) 0.64 pmol/ml to 9.51 pmol/ml)). Two studies with 100 participants further assessed the change in Ac-SDKP level in humans with renal failure using ACE-I. The administration of an ACE-I was associated with a significant increase in Ac-SDKP levels (MD 8.94 pmol/ml; 95% CI 2.55 to 15.33; I2 = 44%). Conclusion ACE-I increased Ac-SDKP levels in human plasma. These findings provide the rationale for testing the impact of ACE-I on Ac-SDKP levels and fibrosis in tuberculous pericarditis.
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Affiliation(s)
- Ayanda Trevor Mnguni
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- * E-mail: (ATM); (MEE)
| | - Mark E. Engel
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
- * E-mail: (ATM); (MEE)
| | - Megan S. Borkum
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Bongani M. Mayosi
- Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
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Masuyer G, Douglas RG, Sturrock ED, Acharya KR. Structural basis of Ac-SDKP hydrolysis by Angiotensin-I converting enzyme. Sci Rep 2015; 5:13742. [PMID: 26403559 DOI: 10.1038/srep13742] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 08/04/2015] [Indexed: 11/16/2022] Open
Abstract
Angiotensin-I converting enzyme (ACE) is a zinc dipeptidylcarboxypeptidase with two active domains and plays a key role in the regulation of blood pressure and electrolyte homeostasis, making it the principal target in the treatment of cardiovascular disease. More recently, the tetrapetide N-acetyl-Ser–Asp–Lys–Pro (Ac-SDKP) has emerged as a potent antifibrotic agent and negative regulator of haematopoietic stem cell differentiation which is processed exclusively by ACE. Here we provide a detailed biochemical and structural basis for the domain preference of Ac-SDKP. The high resolution crystal structures of N-domain ACE in complex with the dipeptide products of Ac-SDKP cleavage were obtained and offered a template to model the mechanism of substrate recognition of the enzyme. A comprehensive kinetic study of Ac-SDKP and domain co-operation was performed and indicated domain interactions affecting processing of the tetrapeptide substrate. Our results further illustrate the molecular basis for N-domain selectivity and should help design novel ACE inhibitors and Ac-SDKP analogues that could be used in the treatment of fibrosis disorders.
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