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Abstract
Angiotensin (Ang) III, a biologically active peptide of the renin angiotensin system (RAS) is predominantly known for its central effects on blood pressure. Our understanding of the RAS has evolved from the simplified, classical RAS, a hormonal system regulating blood pressure to a complex system affecting numerous biological processes. Ang II, the main RAS peptide has been widely studied, and its deleterious effects when overexpressed is well-documented. However, other components of the RAS such as Ang III are not well studied. This review examines the molecular and biological actions of Ang III and provides insight into Ang III's potential role in metabolic diseases.
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Affiliation(s)
- Ann Tenneil O'Connor
- Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Dhanush Haspula
- Molecular Signaling Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD NIH-20892, USA
| | - Ahmed Z Alanazi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Michelle A Clark
- Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, USA.
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Nesbitt SD. Firibastat: a Novel Treatment for Hypertension. Curr Hypertens Rep 2021; 23:46. [PMID: 34950965 DOI: 10.1007/s11906-021-01163-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to discuss the unique mechanism of firibastat, a new antihypertension medication. Hypertension continues to be a highly prevalent public health issue. RECENT FINDINGS Firibastat is a novel agent developed to treat hypertension. As the first member in the class of centrally acting agents to target the brain renin angiotensin system, firibastat offers new pathways to consider and enhances the regimen of agents currently available to treat hypertension. Recent clinical trials have demonstrated effectiveness and safety in mild hypertension as well as resistant hypertension. This review introduces firibastat as a new therapeutic class of treatment for hypertension focused on the renin angiotensin system in the brain. Early studies have shown a significant reduction in blood pressure with minimal side effects particularly in patients who are difficult to treat.
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Valverde A, Dunys J, Lorivel T, Debayle D, Gay AS, Lacas-Gervais S, Roques BP, Chami M, Checler F. Aminopeptidase A contributes to biochemical, anatomical and cognitive defects in Alzheimer's disease (AD) mouse model and is increased at early stage in sporadic AD brain. Acta Neuropathol 2021; 141:823-839. [PMID: 33881611 PMCID: PMC8113186 DOI: 10.1007/s00401-021-02308-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 12/17/2022]
Abstract
One of the main components of senile plaques in Alzheimer's disease (AD)-affected brain is the Aβ peptide species harboring a pyroglutamate at position three pE3-Aβ. Several studies indicated that pE3-Aβ is toxic, prone to aggregation and serves as a seed of Aβ aggregation. The cyclisation of the glutamate residue is produced by glutaminyl cyclase, the pharmacological and genetic reductions of which significantly alleviate AD-related anatomical lesions and cognitive defects in mice models. The cyclisation of the glutamate in position 3 requires prior removal of the Aβ N-terminal aspartyl residue to allow subsequent biotransformation. The enzyme responsible for this rate-limiting catalytic step and its relevance as a putative trigger of AD pathology remained yet to be established. Here, we identify aminopeptidase A as the main exopeptidase involved in the N-terminal truncation of Aβ and document its key contribution to AD-related anatomical and behavioral defects. First, we show by mass spectrometry that human recombinant aminopeptidase A (APA) truncates synthetic Aβ1-40 to yield Aβ2-40. We demonstrate that the pharmacological blockade of APA with its selective inhibitor RB150 restores the density of mature spines and significantly reduced filopodia-like processes in hippocampal organotypic slices cultures virally transduced with the Swedish mutated Aβ-precursor protein (βAPP). Pharmacological reduction of APA activity and lowering of its expression by shRNA affect pE3-42Aβ- and Aβ1-42-positive plaques and expressions in 3xTg-AD mice brains. Further, we show that both APA inhibitors and shRNA partly alleviate learning and memory deficits observed in 3xTg-AD mice. Importantly, we demonstrate that, concomitantly to the occurrence of pE3-42Aβ-positive plaques, APA activity is augmented at early Braak stages in sporadic AD brains. Overall, our data indicate that APA is a key enzyme involved in Aβ N-terminal truncation and suggest the potential benefit of targeting this proteolytic activity to interfere with AD pathology.
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Affiliation(s)
- Audrey Valverde
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France
| | - Julie Dunys
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France
| | - Thomas Lorivel
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France
| | - Delphine Debayle
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France
| | - Anne-Sophie Gay
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France
| | | | - Bernard P Roques
- Faculté de Pharmacie, Université Paris-Descartes, 75006, Paris, France
| | - Mounia Chami
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France
| | - Frédéric Checler
- INSERM, CNRS, IPMC, Team Labelled "Laboratory of Excellence (LABEX) DistAlz", Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, 660 route des Lucioles, Sophia-Antipolis, 06560, Valbonne, France.
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Ramírez-Expósito MJ, Carrera-González MP, Martínez-Martos JM. Sex differences exist in brain renin-angiotensin system-regulating aminopeptidase activities in transplacental ethyl-nitrosourea-induced gliomas. Brain Res Bull 2021; 168:1-7. [PMID: 33359638 DOI: 10.1016/j.brainresbull.2020.12.008] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/07/2020] [Accepted: 12/15/2020] [Indexed: 11/29/2022]
Abstract
INTRODUCTION The renin angiotensin system (RAS) is emerging as an important target for the treatment of glioma. We had described that the local RAS is involved in vivo in tumor growth in the rat model of experimental C6 glioma implanted at the subcutaneous region, through the modification of several proteolytic regulatory enzymes of aminopeptidase type. METHODS We analyze RAS-regulating aminopeptidase activities in plasma and brain tissue of control male and female rats and rats with transplacental ethylnitrosourea-induced gliomas. RESULTS No differences were found either the mean total number of tumors per animal or the tumor volume between male and female animals. However, we have found increased levels in aspartyl aminopeptidase in both males and females and of aminopeptidase B only in males. On the contrary, decreased levels were found in aminopeptidase N and insulin-regulated aminopeptidase activities in both males and females, whereas aminopeptidase A only decreased in females. Decreased levels of aminopeptidase N, aminopeptidase B and insulin-regulated aminopeptidase were also shown in plasma of only female rats. CONCLUSIONS Under the complexity of RAS cascade, the changes found suggest the predominant actions of angiotensin III against a decreased action of angiotensin II and angiotensin IV. We conclude that angiotensin peptides are involved in tumor growth in this rat model of glioma and that their role in tumor growth can be analyzed through their corresponding proteolytic regulatory enzymes, which make them new and attractive therapeutic targets beyond the use or angiotensin converting enzyme (ACE) inhibitors and angiotensin receptor blockers (ARBs).
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Affiliation(s)
- M J Ramírez-Expósito
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain
| | - M P Carrera-González
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain; Department of Nursing, Pharmacology and Physiotherapy, Faculty of Medicine and Nursing, University of Cordoba. IMIBIC, Córdoba, Spain
| | - J M Martínez-Martos
- Experimental and Clinical Physiopathology Research Group CTS-1039, Department of Health Sciences, School of Health Sciences, University of Jaén, Jaén, Spain.
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Mizutani S, Matsumoto K, Kato Y, Mizutani E, Mizutani H, Iwase A, Shibata K. New insights into human endometrial aminopeptidases in both implantation and menstruation. Biochim Biophys Acta Proteins Proteom 2019; 1868:140332. [PMID: 31765716 DOI: 10.1016/j.bbapap.2019.140332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 11/19/2019] [Accepted: 11/21/2019] [Indexed: 01/16/2023]
Abstract
The endometrium cycle involves proliferation of endometrial epithelial cells in preparation for implantation of fertilized ovum. With ovulation, the endometrium secretes nutrients such as peptides and amino acids into the endometrial cavity. The histological evidence of ovulation in normal menstrual cycle includes subnuclear glycogen vacuoles surrounded by placental leucine aminopeptidase (P-LAP) in endometrial epithelial cells. P-LAP is an essentially involved in intracellular trafficking of glucose transporter (GLUT) 4 which is primarily important for glucose uptake in skeletal muscles and fat tissues. On the other hand, glucose influx from blood into endometrial epithelial cells is not mainly mediated by GLUTs, but by coincident appearing progesterone just after ovulation. Progesterone increases permeability of not only plasma membranes, but also lysosomal membranes, and this may be primarily involved in glucose influx. Progesterone also expands the exocytosis in the endometrium after ovulation, and endometrial secretion after ovulation is possibly apocrine and holocrine, which is augmented and exaggerated exocytosis of the lysosomal contents. The endometrial spiral arteries/arterioles are surrounded by endometrial stromal cells which are differentiated into decidual/pre-decidual cells. Decidual cells are devoid of aminopeptidase A (APA), possibly leading to enhancement of Angiotensin-II action in decidual cell area due to loss of its degradation by APA. Angiotensin-II is thought to exert growth-factor-like effects in post-implantation embryos in decidual cells, thereby contributing to implantation. Without implantation, angiotensin-II constricts the endometrial spiral arteries/arterioles to promote menstruation. Thus, P-LAP and APA may be involved in homeostasis in uterus via regulating glucose transport and vasoconstrictive peptides.
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Affiliation(s)
- Shigehiko Mizutani
- Daiyabilding Lady's Clinic, 3-15-1 Meieki, Nakamura-ku, Nagoya 450-0002, Japan; Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya 466-8550, Japan.
| | - Kunio Matsumoto
- Division of Tumor Dynamics and Regulation, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Yukio Kato
- Department of Molecular Pharmacotherapeutics, Faculty of Pharmacy, Kanazawa University, Kanazawa, Japan
| | - Eita Mizutani
- Daiyabilding Lady's Clinic, 3-15-1 Meieki, Nakamura-ku, Nagoya 450-0002, Japan; Department of Obstetrics and Gynecology, Bantane Hospital, Fujita Health University, 3-6-10 Odobashi, Nakagawa-ku, Nagoya 454-8509, Japan
| | - Hidesuke Mizutani
- Department of Obstetrics and Gynecology, Okazaki Municipal Hospital, 3-1 Koryuji-cho, Okazaaki 444-8553, Japan
| | - Akira Iwase
- Department of Obstetrics and Gynecology, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi 371-8511, Japan
| | - Kiyosumi Shibata
- Department of Obstetrics and Gynecology, Bantane Hospital, Fujita Health University, 3-6-10 Odobashi, Nakagawa-ku, Nagoya 454-8509, Japan
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Marapaka AK, Pillalamarri V, Gumpena R, Haque N, Bala SC, Jangam A, Addlagatta A. Discovery, Structural and Biochemical Studies of a rare Glu/Asp Specific M1 Class Aminopeptidase from Legionella pneumophila. Int J Biol Macromol 2018; 120:1111-1118. [PMID: 30172821 DOI: 10.1016/j.ijbiomac.2018.08.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 06/25/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 10/28/2022]
Abstract
Aminopeptidases catalyze the hydrolysis of amino acids from the N-terminus of protein or peptide substrates. M1 family aminopeptidases are important for the pathogenicity of bacteria and play critical role in many physiological processes such as protein maturation, regulation of peptide hormone levels in humans. Most of the M1 family aminopeptidases reported till date display broad substrates specificity, mostly specific to basic and hydrophobic residues. In the current study we report the discovery of a novel M1 class aminopeptidase from Legionella pneumophila (LePepA), which cleaves only acidic residues. Biochemical and structural studies reveal that the S1 pocket is polar and positively charged. Bioinformatic analysis suggests that such active site is unique to only Legionella species and probably evolved for special needs of the microbe. Given its specific activity, LePepA could be useful in specific biotechnological applications.
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Affiliation(s)
- Anil Kumar Marapaka
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), Rafi Marg, New Delhi 110001, India
| | - Vijaykumar Pillalamarri
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), Rafi Marg, New Delhi 110001, India
| | - Rajesh Gumpena
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
| | - Neshatul Haque
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
| | - Sandeep Chowdary Bala
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), Rafi Marg, New Delhi 110001, India
| | - Aruna Jangam
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
| | - Anthony Addlagatta
- Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), Rafi Marg, New Delhi 110001, India.
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Holmes RS, Spradling-Reeves KD, Cox LA. Mammalian Glutamyl Aminopeptidase Genes (ENPEP) and Proteins: Comparative Studies of a Major Contributor to Arterial Hypertension. J Data Mining Genomics Proteomics 2017; 8:2. [PMID: 29900035 PMCID: PMC5995572 DOI: 10.4172/2153-0602.1000211] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 12/12/2022]
Abstract
Glutamyl aminopeptidase (ENPEP) is a member of the M1 family of endopeptidases which are mammalian type II integral membrane zinc-containing endopeptidases. ENPEP is involved in the catabolic pathway of the renin-angiotensin system forming angiotensin III, which participates in blood pressure regulation and blood vessel formation. Comparative ENPEP amino acid sequences and structures and ENPEP gene locations were examined using data from several mammalian genome projects. Mammalian ENPEP sequences shared 71-98% identities. Five N-glycosylation sites were conserved for all mammalian ENPEP proteins examined although 9-18 sites were observed, in each case. Sequence alignments, key amino acid residues and predicted secondary and tertiary structures were also studied, including transmembrane and cytoplasmic sequences and active site residues. Highest levels of human ENPEP expression were observed in the terminal ileum of the small intestine and in the kidney cortex. Mammalian ENPEP genes contained 20 coding exons. The human ENPEP gene promoter and first coding exon contained a CpG island (CpG27) and at least 6 transcription factor binding sites, whereas the 3'-UTR region contained 7 miRNA target sites, which may contribute to the regulation of ENPEP gene expression in tissues of the body. Phylogenetic analyses examined the relationships of mammalian ENPEP genes and proteins, including primate, other eutherian, marsupial and monotreme sources, using chicken ENPEP as a primordial sequence for comparative purposes.
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Affiliation(s)
- Roger S Holmes
- Department of Genetics and Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA
- Griffith Institute for Drug Design and School of Natural Sciences, Griffith University, Nathan, QLD, Australia
| | - Kimberly D Spradling-Reeves
- Department of Genetics and Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Laura A Cox
- Department of Genetics and Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA
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Abstract
The renin angiotensin system (RAS) is a peptide hormone system that plays an important role in the pathophysiology of various diseases, including congestive heart failure, hypertension, myocardial infarction, and diabetic nephropathy. This has led researchers to focus extensively on this system, leading to the discovery of various peptides, peptidases, receptors and signal transduction mechanisms intrinsic to the RAS. Angiotensinogen (AGT), angiotensin (Ang) II, Ang III, Ang IV, and Ang-(1-7) are the main biologically active peptides of RAS. However, most of the available studies have focused on Ang II as the likely key peptide from the RAS that directly and indirectly regulates physiological functions leading to pathological conditions. However, data from recent studies suggest that Ang III may produce physiologically relevant effects that are similar to those produced by Ang II. Hence, this review focuses on Ang III and the myriad of physiological effects that it produces in the body.
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Affiliation(s)
- Vudhya G Yugandhar
- Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328, USA
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