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Watts JA, Arroyo JP. Rethinking Vasopressin: New Insights into Vasopressin Signaling and Its Implications. KIDNEY360 2023; 4:1174-1180. [PMID: 37357355 PMCID: PMC10476687 DOI: 10.34067/kid.0000000000000194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 06/06/2023] [Indexed: 06/27/2023]
Abstract
Vasopressin is a highly conserved peptide hormone that has been traditionally associated with water homeostasis. There is accumulating evidence in both humans and animal models that vasopressin is implicated in the regulation of metabolism. This review focuses on the effects that vasopressin exerts on the regulation of glucose and fatty acids with a particular emphasis on the potential repercussions of metabolic dysregulation in kidney disease.
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Affiliation(s)
- Jason A. Watts
- Epigenetics and Stem Cell Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Juan Pablo Arroyo
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
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2
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Benadda S, Nugue M, Koumantou D, Bens M, De Luca M, Pellé O, Monteiro RC, Evnouchidou I, Saveanu L. Activating FcγR function depends on endosomal-signaling platforms. iScience 2023; 26:107055. [PMID: 37360697 PMCID: PMC10285637 DOI: 10.1016/j.isci.2023.107055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 04/02/2023] [Accepted: 06/01/2023] [Indexed: 06/28/2023] Open
Abstract
Cell surface receptor internalization can either terminate signaling or activate alternative endosomal signaling pathways. We investigated here whether endosomal signaling is involved in the function of the human receptors for Fc immunoglobulin fragments (FcRs): FcαRI, FcγRIIA, and FcγRI. All these receptors were internalized after their cross-linking with receptor-specific antibodies, but their intracellular trafficking was different. FcαRI was targeted directly to lysosomes, while FcγRIIA and FcγRI were internalized in particular endosomal compartments described by the insulin esponsive minoeptidase (IRAP), where they recruited signaling molecules, such as the active form of the kinase Syk, PLCγ and the adaptor LAT. Destabilization of FcγR endosomal signaling in the absence of IRAP compromised cytokine secretion downstream FcγR activation and macrophage ability to kill tumor cells by antibody-dependent cell-mediated cytotoxicity (ADCC). Our results indicate that FcγR endosomal signaling is required for the FcγR-driven inflammatory reaction and possibly for the therapeutic action of monoclonal antibodies.
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Affiliation(s)
- Samira Benadda
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Mathilde Nugue
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Despoina Koumantou
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Marcelle Bens
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Mariacristina De Luca
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Olivier Pellé
- INSERM UMR 1163, Cell Sorting Facility, Paris, France
- INSERM UMR 1163, Laboratoire of Immunogenetics of Pediatric Autoimmunity, Paris, France
| | - Renato C. Monteiro
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Irini Evnouchidou
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
- Inovarion, Paris, France
| | - Loredana Saveanu
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
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3
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Zuchowski Y, Carty J, Terker AS, Bock F, Trapani JB, Bhave G, Watts JA, Keller S, Zhang M, Zent R, Harris RC, Arroyo JP. Insulin-regulated aminopeptidase is required for water excretion in response to acute hypotonic stress. Am J Physiol Renal Physiol 2023; 324:F521-F531. [PMID: 36995926 PMCID: PMC10202483 DOI: 10.1152/ajprenal.00318.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 03/31/2023] Open
Abstract
The objective of this study was to understand the response of mice lacking insulin-regulated aminopeptidase (IRAP) to an acute water load. For mammals to respond appropriately to acute water loading, vasopressin activity needs to decrease. IRAP degrades vasopressin in vivo. Therefore, we hypothesized that mice lacking IRAP have an impaired ability to degrade vasopressin and, thus, have persistent urinary concentration. Age-matched 8- to 12-wk-old IRAP wild-type (WT) and knockout (KO) male mice were used for all experiments. Blood electrolytes and urine osmolality were measured before and 1 h after water load (∼2 mL sterile water via intraperitoneal injection). Urine was collected from IRAP WT and KO mice for urine osmolality measurements at baseline and after 1 h administration of the vasopressin type 2 receptor antagonist OPC-31260 (10 mg/kg ip). Immunofluorescence and immunoblot analysis were performed on kidneys at baseline and after 1 h acute water load. IRAP was expressed in the glomerulus, thick ascending loop of Henle, distal tubule, connecting duct, and collecting duct. IRAP KO mice had elevated urine osmolality compared with WT mice due to higher membrane expression of aquaporin 2 (AQP2), which was restored to that of controls after administration of OPC-31260. IRAP KO mice developed hyponatremia after an acute water load because they were unable to increase free water excretion due to increased surface expression of AQP2. In conclusion, IRAP is required to increase water excretion in response to an acute water load due to persistent vasopressin stimulation of AQP2.NEW & NOTEWORTHY Insulin-regulated aminopeptidase (IRAP) degrades vasopressin, but its role in urinary concentration and dilution is unknown. Here, we show that IRAP-deficient mice have a high urinary osmolality at baseline and are unable to excrete free water in response to water loading. These results reveal a novel regulatory role for IRAP in urine concentration and dilution.
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Affiliation(s)
- Yvonne Zuchowski
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Joshua Carty
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Andrew S Terker
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Fabian Bock
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Jonathan B Trapani
- Vanderbilt University School of Medicine, Nashville, Tennessee, United States
| | - Gautam Bhave
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Jason A Watts
- Epigenetics and Stem Cell Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, United States
| | - Susanna Keller
- Division of Endocrinology and Metabolism, Department of Medicine, University of Virginia, Charlottesville, Virginia, United States
| | - Mingzhi Zhang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Roy Zent
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, United States
| | - Raymond C Harris
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, United States
| | - Juan Pablo Arroyo
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee, United States
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4
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Bratti M, Vibhushan S, Longé C, Koumantou D, Ménasché G, Benhamou M, Varin-Blank N, Blank U, Saveanu L, Ben Mkaddem S. Insulin-regulated aminopeptidase contributes to setting the intensity of FcR-mediated inflammation. Front Immunol 2022; 13:1029759. [PMID: 36389775 PMCID: PMC9647545 DOI: 10.3389/fimmu.2022.1029759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/12/2022] [Indexed: 11/25/2022] Open
Abstract
The function of intracellular trafficking in immune-complex triggered inflammation remains poorly understood. Here, we investigated the role of Insulin-Regulated Amino Peptidase (IRAP)-positive endosomal compartments in Fc receptor (FcR)-induced inflammation. Less severe FcγR-triggered arthritis, active systemic anaphylaxis and FcεRI-triggered passive systemic anaphylaxis were observed in IRAP-deficient versus wild-type mice. In mast cells FcεRI stimulation induced rapid plasma membrane recruitment of IRAP-positive endosomes. IRAP-deficient cells exhibited reduced secretory responses, calcium signaling and activating SykY519/520 phosphorylation albeit receptor tyrosine phosphorylation on β and γ subunits was not different. By contrast, in the absence of IRAP, SHP1-inactivating phosphorylation on Ser591 that controls Syk activity was decreased. Ex-vivo cell profiling after FcγR-triggered anaphylaxis confirmed decreased phosphorylation of both SykY519/520 and SHP-1S591 in IRAP-deficient neutrophils and monocytes. Thus, IRAP-positive endosomal compartments, in promoting inhibition of SHP-1 during FcR signaling, control the extent of phosphorylation events at the plasma membrane and contribute to setting the intensity of immune-complex triggered inflammatory diseases.
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Affiliation(s)
- Manuela Bratti
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Shamila Vibhushan
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Cyril Longé
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1163, Paris, France
| | - Despoina Koumantou
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Gaël Ménasché
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1163, Paris, France
| | - Marc Benhamou
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Nadine Varin-Blank
- Institut National de la Santé et de la Recherche Médicale (INSERM) U978, Université Paris 13 Sorbonne Paris Nord, Unité de Formation et de Recherche (UFR) Santé Médecine et Biologie Humaine (SMBH), Bobigny, France
| | - Ulrich Blank
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
- *Correspondence: Ulrich Blank,
| | - Loredana Saveanu
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Sanae Ben Mkaddem
- Institut National de la Santé et de la Recherche Médicale (INSERM) U978, Université Paris 13 Sorbonne Paris Nord, Unité de Formation et de Recherche (UFR) Santé Médecine et Biologie Humaine (SMBH), Bobigny, France
- Institute of biological Sciences, Mohammed VI Polytechnic University (UM6P), Ben-Guerir, Morocco
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5
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Pei J, Prasad M, Mohamed Helal G, El-Sherbiny M, Abdelmonem Elsherbini DM, Rajagopal P, Palanisamy CP, Veeraraghavan VP, Jayaraman S, Surapaneni KM. Beta-Sitosterol Facilitates GLUT4 Vesicle Fusion on the Plasma Membrane via the Activation of Rab/IRAP/Munc 18 Signaling Pathways in Diabetic Gastrocnemius Muscle of Adult Male Rats. Bioinorg Chem Appl 2022; 2022:7772305. [PMID: 35992048 PMCID: PMC9388314 DOI: 10.1155/2022/7772305] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 05/21/2022] [Indexed: 12/18/2022] Open
Abstract
Nutritional overload in the form of high-fat and nonglycolysis sugar intake contributes towards the accelerated creation of reactive oxygen species (ROS), hyperglycemia, and dyslipidemia. Glucose absorption and its subsequent oxidation processes in fat and muscle tissues alter as a consequence of these modifications. Insulin resistance (IR) caused glucose transporter 4 (GLUT4) translocation to encounter a challenge that manifested itself as changes in glycolytic pathways and insulin signaling. We previously found that beta (β)-sitosterol reduces IR in fat tissue via IRS-1/PI3K/Akt facilitated signaling due to its hypolipidemic and hypoglycemic activity. The intention of this research was to see whether the phytosterol β-sitosterol can aid in the translocation of GLUT4 in rats fed on high-fat diet (HFD) and sucrose by promoting Rab/IRAP/Munc 18 signaling molecules. The rats were labeled into four groups, namely control rats, HFD and sucrose-induced diabetic control rats, HFD and sucrose-induced diabetic rats given oral dose of 20 mg/kg body wt./day of β-sitosterol treatment for 30 days, and HFD and sucrose-induced diabetic animals given oral administration of 50 mg/kg body wt./day metformin for 30 days. Diabetic rats administered with β-sitosterol and normalized the titers of blood glucose, serum insulin, serum testosterone, and the status of insulin tolerance and oral glucose tolerance. In comparison with the control group, β-sitosterol effectively regulated both glycolytic and gluconeogenesis enzymes. Furthermore, qRT-PCR analysis of the mRNA levels of key regulatory genes such as SNAP23, VAMP-2, syntaxin-4, IRAP, vimentin, and SPARC revealed that β-sitosterol significantly regulated the mRNA levels of the above genes in diabetic gastrocnemius muscle. Protein expression analysis of Rab10, IRAP, vimentin, and GLUT4 demonstrated that β-sitosterol had a positive effect on these proteins, resulting in effective GLUT4 translocation in skeletal muscle. According to the findings, β-sitosterol reduced HFD and sucrose-induced IR and augmented GLUT4 translocation in gastrocnemius muscle through insulin signaling modulation via Rab/IRAP/Munc 18 and glucose metabolic enzymes. The present work is the first of its kind to show that β-sitosterol facilitates GLUT4 vesicle fusion on the plasma membrane via Rab/IRAP/Munc 18 signaling molecules in gastrocnemius muscle.
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Affiliation(s)
- JinJin Pei
- Qinba State Key Laboratory of Biological Resources and Ecological Environment, 2011 QinLing-Bashan Mountains, Bioresources Comprehensive Development C. I. C, Shaanxi Province Key Laboratory of Bio-Resources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong 723001, Shaanxi, China
| | - Monisha Prasad
- Centre of Molecular Medicine and Diagnostics (COMManD), Department of Biochemistry, Saveetha Dental College & Hospital, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai 600077, India
| | - Ghada Mohamed Helal
- Department of Medical Biochemistry, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Mohamed El-Sherbiny
- Department of Basic Medical Sciences, College of Medicine, AlMaarefa University, P.O. Box 71666, Riyadh 11597, Saudi Arabia
| | - Dalia Mahmoud Abdelmonem Elsherbini
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
- Department of Anatomy, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Ponnulakshmi Rajagopal
- Central Research Laboratory, Meenakshi Academy of Higher Education and Research (Deemed to be University), Chennai 600078, India
| | - Chella Perumal Palanisamy
- State Key Laboratory of Biobased Material and Green Papermaking, College of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, China
| | - Vishnu Priya Veeraraghavan
- Centre of Molecular Medicine and Diagnostics (COMManD), Department of Biochemistry, Saveetha Dental College & Hospital, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai 600077, India
| | - Selvaraj Jayaraman
- Centre of Molecular Medicine and Diagnostics (COMManD), Department of Biochemistry, Saveetha Dental College & Hospital, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai 600077, India
| | - Krishna Mohan Surapaneni
- Departments of Biochemistry,Molecular Virology,Medical Education,Research,Clinical Skills & Simulation, Panimalar Medical College Hospital & Research Institute, Varadharajapuram, Poonamallee, Chennai 600123, India
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6
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O'Connor AT, Haspula D, Alanazi AZ, Clark MA. Roles of Angiotensin III in the brain and periphery. Peptides 2022; 153:170802. [PMID: 35489649 DOI: 10.1016/j.peptides.2022.170802] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 10/18/2022]
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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7
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Verbrugge SAJ, Alhusen JA, Kempin S, Pillon NJ, Rozman J, Wackerhage H, Kleinert M. Genes controlling skeletal muscle glucose uptake and their regulation by endurance and resistance exercise. J Cell Biochem 2021; 123:202-214. [PMID: 34812516 DOI: 10.1002/jcb.30179] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 10/27/2021] [Accepted: 11/04/2021] [Indexed: 12/25/2022]
Abstract
Exercise improves the insulin sensitivity of glucose uptake in skeletal muscle. Due to that, exercise has become a cornerstone treatment for type 2 diabetes mellitus (T2DM). The mechanisms by which exercise improves skeletal muscle insulin sensitivity are, however, incompletely understood. We conducted a systematic review to identify all genes whose gain or loss of function alters skeletal muscle glucose uptake. We subsequently cross-referenced these genes with recently generated data sets on exercise-induced gene expression and signaling. Our search revealed 176 muscle glucose-uptake genes, meaning that their genetic manipulation altered glucose uptake in skeletal muscle. Notably, exercise regulates the expression or phosphorylation of more than 50% of the glucose-uptake genes or their protein products. This included many genes that previously have not been associated with exercise-induced insulin sensitivity. Interestingly, endurance and resistance exercise triggered some common but mostly unique changes in expression and phosphorylation of glucose-uptake genes or their protein products. Collectively, our work provides a resource of potentially new molecular effectors that play a role in the incompletely understood regulation of muscle insulin sensitivity by exercise.
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Affiliation(s)
- Sander A J Verbrugge
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC), Helmholtz Zentrum München, Neuherberg, Germany.,Exercise Biology Group, Department for Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Julia A Alhusen
- Molecular Endocrinology, Institute for Diabetes and Cancer (IDC), Helmholtz Zentrum Munich, Helmholtz Diabetes Center (HMGU), Munich, Germany
| | - Shimon Kempin
- Exercise Biology Group, Department for Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Nicolas J Pillon
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Jan Rozman
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the Czech Academy of Sciences, Vestec, Czech Republic
| | - Henning Wackerhage
- Exercise Biology Group, Department for Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Maximilian Kleinert
- Muscle Physiology and Metabolism Group, German Institute of Human Nutrition, Potsdam - Rehbrücke, Nuthetal, Germany.,Department of Nutrition, Exercise and Sports, Faculty of Science, Section of Molecular Physiology, University of Copenhagen, Copenhagen, Denmark
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8
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Takeda R, Demura M, Sugimura Y, Miyamori I, Konoshita T, Yamamoto H. Pregnancy-associated diabetes insipidus in Japan-a review based on quoting from the literatures reported during the period from 1982 to 2019. Endocr J 2021; 68:375-385. [PMID: 33775975 DOI: 10.1507/endocrj.ej20-0745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
This Review Article overviews the literature on diabetes insipidus (DI) associated with pregnancy and labor in Japan published from 1982 to 2019. The total number of patients collected was 361, however, only one-third of these cases had detailed pathophysiologic information enabling us to identify the respective etiology and subtype. Pregnancy-associated DI can be divided into 3 etiologies, central (neurogenic) DI, nephrogenic DI, and excess vasopressinase-associated DI. Neurogenic DI has various causes: for example, DI associated with tumoral lesions in the pituitary and neighboring area, DI associated with Sheehan's syndrome and/or pituitary apoplexy, and DI associated with lymphocytic infundibuloneurohypophysitis (LINH, stalkitis). Nephrogenic DI results from defective response of the kidney to normal levels of vasopressin. However, the most interesting causal factor of pregnancy-associated DI is excess vasopressinase, caused either by excess production of vasopressinase by the placenta or defective clearance of vasopressinase by the liver. Hepatic complications resulting in pregnancy-associated DI include acute fatty liver of pregnancy (AFLP) and HELLP syndrome (syndrome of hemolysis, elevated liver enzymes, low platelets), as well as pre-existing or co-incidental hepatic diseases. A possible role of glucose uptake in putative stress-induced DI and the importance of correct diagnosis and treatment of pregnancy-associated DI, including use of 1-deamino 8-D arginine vasopressin, are also discussed.
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Affiliation(s)
- Ryoyu Takeda
- Department of Internal Medicine, Kanazawa University*, Kanazawa 920-8640, Japan
- KKR† Kanazawa Hospital, Kanazawa 921-8035, Japan‡
| | - Masashi Demura
- Department of Hygiene, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-8640, Japan
| | - Yoshihisa Sugimura
- Department of Endocrinology and Metabolism, Fujita Health University, Toyoake 470-1192, Japan
| | - Isamu Miyamori
- Department of Internal Medicine, University of Fukui Faculty of Medical Sciences*, Fukui 910-1193, Japan
| | - Tadashi Konoshita
- Third Department of Internal Medicine, University of Fukui Faculty of Medical Sciences, Fukui 910-1193, Japan
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9
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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] [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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10
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Wang M, Wang J. Glucose transporter GLUT1 influences Plasmodium berghei infection in Anopheles stephensi. Parasit Vectors 2020; 13:285. [PMID: 32503601 PMCID: PMC7275331 DOI: 10.1186/s13071-020-04155-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 05/28/2020] [Indexed: 12/04/2022] Open
Abstract
Background Sugar-feeding provides energy for mosquitoes. Facilitated glucose transporters (GLUTs) are responsible for the uptake of glucose in animals. However, knowledge of GLUTs function in Anopheles spp. is limited. Methods Phylogenetic analysis of GLUTs in Anopheles stephensi was performed by the maximum likelihood and Bayesian inference methods. The spatial and temporal expression patterns of four Asteglut genes were analyzed by qPCR. The function of Asteglut1 was examined using a dsRNA-mediated RNA interference method. Transcriptome analysis was used to investigate the global influence of Asteglut1 on mosquito physiology. Results We identified 4 glut genes, Asteglut1, Asteglutx, Asteglut3 and Asteglut4 in An. stephensi. Asteglut1, Asteglut3 and Asteglut4 were mainly expressed in the midgut. Plasmodium berghei infection differentially regulated the expression of Asteglut genes with significant downregulation of Asteglut1 and Asteglut4, while upregulation of Asteglutx. Only knocking-down Asteglut1 facilitated Plasmodium berghei infection in An. stephensi. This might be due to the accumulation of glucose prior to blood-feeding in dsAsteglut1-treated mosquitoes. Our transcriptome analysis revealed that knockdown of Asteglut1 differentially regulated expression of genes associated with multiple functional clusters, especially those related to detoxification and immunity. The dysregulation of multiple pathways might contribute to the increased P. berghei infection. Conclusions Our study shows that Asteglut1 participates in defense against P. berghei in An. stephensi. The regulation of Asteglut1 on vector competence might through modulating multiple biological processes, such as detoxification and immunity.![]()
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Descamps D, Evnouchidou I, Caillens V, Drajac C, Riffault S, van Endert P, Saveanu L. The Role of Insulin Regulated Aminopeptidase in Endocytic Trafficking and Receptor Signaling in Immune Cells. Front Mol Biosci 2020; 7:583556. [PMID: 33195428 PMCID: PMC7606930 DOI: 10.3389/fmolb.2020.583556] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/25/2020] [Indexed: 12/15/2022] Open
Abstract
Insulin regulated aminopeptidase (IRAP) is a type II transmembrane protein with broad tissue distribution initially identified as a major component of Glut4 storage vesicles (GSV) in adipocytes. Despite its almost ubiquitous expression, IRAP had been extensively studied mainly in insulin responsive cells, such as adipocytes and muscle cells. In these cells, the enzyme displays a complex intracellular trafficking pattern regulated by insulin. Early studies using fusion proteins joining the IRAP cytosolic domain to various reporter proteins, such as GFP or the transferrin receptor (TfR), showed that the complex and regulated trafficking of the protein depends on its cytosolic domain. This domain contains several motifs involved in IRAP trafficking, as demonstrated by mutagenesis studies. Also, proteomic studies and yeast two-hybrid experiments showed that the IRAP cytosolic domain engages in multiple protein interactions with cytoskeleton components and vesicular trafficking adaptors. These findings led to the hypothesis that IRAP is not only a cargo of GSV but might be a part of the sorting machinery that controls GSV dynamics. Recent work in adipocytes, immune cells, and neurons confirmed this hypothesis and demonstrated that IRAP has a dual function. Its carboxy-terminal domain located inside endosomes is responsible for the aminopeptidase activity of the enzyme, while its amino-terminal domain located in the cytosol functions as an endosomal trafficking adaptor. In this review, we recapitulate the published protein interactions of IRAP and summarize the increasing body of evidence indicating that IRAP plays a role in intracellular trafficking of several proteins. We describe the impact of IRAP deletion or depletion on endocytic trafficking and the consequences on immune cell functions. These include the ability of dendritic cells to cross-present antigens and prime adaptive immune responses, as well as the control of innate and adaptive immune receptor signaling and modulation of inflammatory responses.
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Affiliation(s)
| | - Irini Evnouchidou
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France.,Inovarion, Paris, France
| | - Vivien Caillens
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France
| | - Carole Drajac
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jou-en-Josas, France
| | - Sabine Riffault
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jou-en-Josas, France
| | - Peter van Endert
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France.,Université de Paris, INSERM Unité 1151, CNRS UMR 8253, Paris, France.,Service d'immunologie biologique, AP-HP, Hôpital Necker, Paris, France
| | - Loredana Saveanu
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France
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Barlow N, Thompson PE. IRAP Inhibitors: M1-Aminopeptidase Family Inspiration. Front Pharmacol 2020; 11:585930. [PMID: 33101040 PMCID: PMC7546331 DOI: 10.3389/fphar.2020.585930] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/04/2020] [Indexed: 11/24/2022] Open
Abstract
The insulin regulated aminopeptidase (IRAP) has been proposed as an important therapeutic target for indications including Alzheimer’s disease and immune disorders. To date, a number of IRAP inhibitor designs have been investigated but the total number of molecules investigated remains quite small. As a member the M1 aminopeptidase family, IRAP shares numerous structural features with the other M1 aminopeptidases. The study of those enzymes and the development of inhibitors provide key learnings and new approaches and are potential sources of inspiration for future IRAP inhibitors.
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Affiliation(s)
- Nicholas Barlow
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Philip E Thompson
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
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IRAP-dependent endosomal T cell receptor signalling is essential for T cell responses. Nat Commun 2020; 11:2779. [PMID: 32487999 PMCID: PMC7265453 DOI: 10.1038/s41467-020-16471-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 05/03/2020] [Indexed: 11/09/2022] Open
Abstract
T cell receptor (TCR) activation is modulated by mechanisms such as TCR endocytosis, which is thought to terminate TCR signalling. Here we show that, upon internalization, TCR continues to signal from a set of specialized endosomes that are crucial for T cell functions. Mechanistically, TCR ligation leads to clathrin-mediated internalization of the TCR-CD3ζ complex, while maintaining CD3ζ signalling, in endosomal vesicles that contain the insulin responsive aminopeptidase (IRAP) and the SNARE protein Syntaxin 6. Destabilization of this compartment through IRAP deletion enhances plasma membrane expression of the TCR-CD3ζ complex, yet compromises overall CD3ζ signalling; moreover, the integrity of this compartment is also crucial for T cell activation and survival after suboptimal TCR activation, as mice engineered with a T cell-specific deletion of IRAP fail to develop efficient polyclonal anti-tumour responses. Our results thus reveal a previously unappreciated function of IRAP-dependent endosomal TCR signalling in T cell activation. T cell receptors (TCR) are internalized when activated by their ligands. Here the authors show that the internalized TCRs are localized to endosomes expressing IRAP and Syntaxin 6 to maintain intracellular signalling capacity, whose importance is shown by the absence of efficient polyclonal anti-tumour response in mice with T-specific conditional deletion of IRAP.
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Burns P, Bowditch J, McFadyen J, Loiacono R, Albiston AL, Pham V, Chai SY. Social behaviour is altered in the insulin-regulated aminopeptidase knockout mouse. Behav Brain Res 2019; 376:112150. [DOI: 10.1016/j.bbr.2019.112150] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/06/2019] [Accepted: 08/12/2019] [Indexed: 11/29/2022]
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15
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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. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 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] [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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Seyer B, Diwakarla S, Burns P, Hallberg A, Grӧnbladh A, Hallberg M, Chai SY. Insulin-regulated aminopeptidase inhibitor-mediated increases in dendritic spine density are facilitated by glucose uptake. J Neurochem 2019; 153:485-494. [PMID: 31556456 DOI: 10.1111/jnc.14880] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 09/08/2019] [Accepted: 09/11/2019] [Indexed: 02/06/2023]
Abstract
Ethyl2-acetylamino-7-hydroxy-4-pyridin-3-yl-4H-chromene-3-carboxylate (HFI-419), the benzopyran-based inhibitor of insulin-regulated aminopeptidase (IRAP), has previously been shown to improve spatial working and recognition memory in rodents. However, the mechanism of its cognitive-enhancing effect remains unknown. There is a close correlation between dendritic spine density and learning in vivo and several studies suggest that increases in neuronal glucose uptake and/or alterations to the activity of matrix metalloproteinases (MMPs) may improve memory and increase dendritic spine density. We aimed to identify the potential mechanism by which HFI-419 enhances memory by utilizing rat primary cultures of hippocampal cells. Alterations to dendritic spine density were assessed in the presence of varying concentrations of HFI-419 at different stages of hippocampal cell development. In addition, glucose uptake and changes to spine density were assessed in the presence of indinavir, an inhibitor of the glucose transporter 4 (GLUT4 ), or the matrix metalloprotease inhibitor CAS 204140-01-2. We confirmed that inhibition of IRAP activity with HFI-419 enhanced spatial working memory in rats, and determined that this enhancement may be driven by GLUT4 -mediated changes to dendritic spine density. We observed that IRAP inhibition increased dendritic spine density prior to peak dendritic growth in hippocampal neurons, and that spine formation was inhibited when GLUT4 -mediated glucose uptake was blocked. In addition, during the peak phase of dendritic spine growth, the effect of IRAP inhibition on enhancement of dendritic spine density resulted specifically in an increase in the proportion of mushroom/stubby-like spines, a morphology associated with memory and learning. Moreover, these spines were deemed to be functional based on their expression of the pre-synaptic markers vesicular glutamate transporter 1 and synapsin. Overall, or findings suggest that IRAP inhibitors may facilitate memory by increasing hippocampal dendritic spine density via a GLUT4 -mediated mechanism. Cover Image for this issue: doi: 10.1111/jnc.14745.
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Affiliation(s)
- Benjamin Seyer
- Faculty of Biomedical and Psychological Sciences, Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - Shanti Diwakarla
- The Beijer Laboratory, Department of Pharmaceutical Biosciences, Division of Biological Research on Drug Dependence, Uppsala University, BMC, Uppsala, Sweden
| | - Peta Burns
- Faculty of Biomedical and Psychological Sciences, Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - Anders Hallberg
- Department of Medicinal Chemistry, Uppsala University, BMC, Uppsala, Sweden
| | - Alfhild Grӧnbladh
- The Beijer Laboratory, Department of Pharmaceutical Biosciences, Division of Biological Research on Drug Dependence, Uppsala University, BMC, Uppsala, Sweden
| | - Mathias Hallberg
- The Beijer Laboratory, Department of Pharmaceutical Biosciences, Division of Biological Research on Drug Dependence, Uppsala University, BMC, Uppsala, Sweden
| | - Siew Yeen Chai
- Faculty of Biomedical and Psychological Sciences, Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, Australia
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Pan X, Meriin A, Huang G, Kandror KV. Insulin-responsive amino peptidase follows the Glut4 pathway but is dispensable for the formation and translocation of insulin-responsive vesicles. Mol Biol Cell 2019; 30:1536-1543. [PMID: 30943117 PMCID: PMC6724691 DOI: 10.1091/mbc.e18-12-0792] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
In fat and skeletal muscle cells, insulin-responsive amino peptidase (IRAP) along with glucose transporter 4 (Glut4) and sortilin, represents a major component protein of the insulin-responsive vesicles (IRVs). Here, we show that IRAP, similar to Glut4 and sortilin, is retrieved from endosomes to the trans-Golgi network by retromer. Unlike Glut4, retrograde transport of IRAP does not require sortilin, as retromer can directly bind to the cytoplasmic tail of IRAP. Ablation of IRAP in 3T3-L1 adipocytes shifts the endosomal pool of Glut4 to more acidic endosomes, but does not affect IRV targeting, stability, and insulin responsiveness of Glut4.
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Affiliation(s)
- Xiang Pan
- Department of Biochemistry, Boston University School of Medicine, Boston, MA 02118
| | - Anatoli Meriin
- Department of Biochemistry, Boston University School of Medicine, Boston, MA 02118
| | - Guanrong Huang
- Department of Biochemistry, Boston University School of Medicine, Boston, MA 02118
| | - Konstantin V. Kandror
- Department of Biochemistry, Boston University School of Medicine, Boston, MA 02118,*Address correspondence to: K. V. Kandror ()
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Sadler JBA, Lamb CA, Welburn CR, Adamson IS, Kioumourtzoglou D, Chi NW, Gould GW, Bryant NJ. The deubiquitinating enzyme USP25 binds tankyrase and regulates trafficking of the facilitative glucose transporter GLUT4 in adipocytes. Sci Rep 2019; 9:4710. [PMID: 30886164 PMCID: PMC6423145 DOI: 10.1038/s41598-019-40596-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/15/2019] [Indexed: 12/11/2022] Open
Abstract
Key to whole body glucose homeostasis is the ability of fat and muscle cells to sequester the facilitative glucose transporter GLUT4 in an intracellular compartment from where it can be mobilized in response to insulin. We have previously demonstrated that this process requires ubiquitination of GLUT4 while numerous other studies have identified several molecules that are also required, including the insulin-responsive aminopeptidase IRAP and its binding partner, the scaffolding protein tankyrase. In addition to binding IRAP, Tankyrase has also been shown to bind the deubiquinating enzyme USP25. Here we demonstrate that USP25 and Tankyrase interact, and colocalise with GLUT4 in insulin-sensitive cells. Furthermore depletion of USP25 from adipocytes reduces cellular levels of GLUT4 and concomitantly blunts the ability of insulin to stimulate glucose transport. Collectively, these data support our model that sorting of GLUT4 into its insulin-sensitive store involves a cycle of ubiquitination and subsequent deubiquitination.
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Affiliation(s)
- Jessica B A Sadler
- Henry Wellcome Laboratory of Cell Biology, Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Christopher A Lamb
- Henry Wellcome Laboratory of Cell Biology, Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Cassie R Welburn
- Henry Wellcome Laboratory of Cell Biology, Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Iain S Adamson
- Henry Wellcome Laboratory of Cell Biology, Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | | | - Nai-Wen Chi
- Department of Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Gwyn W Gould
- Henry Wellcome Laboratory of Cell Biology, Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK.
| | - Nia J Bryant
- Department of Biology, University of York, York, YO10 4HJ, UK.
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Differential Gene Expression Profile of Renin-Angiotensin System in the Left Atrium in Mitral Regurgitation Patients. DISEASE MARKERS 2018; 2018:6924608. [PMID: 30581499 PMCID: PMC6276386 DOI: 10.1155/2018/6924608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 11/01/2018] [Indexed: 11/17/2022]
Abstract
Background Left atrial enlargement is a mortality and heart failure risk factor in primary mitral regurgitation (MR) patients. Pig models of MR have shown differential expression of genes linked to the renin-angiotensin system. Therefore, the aim of this study was to investigate the key genes of the renin-angiotensin that are expressed differentially in the left atrial myocardium in MR patients. Methods Quantitative RT-PCR was used to compare gene expression in the renin-angiotensin system in the left atrium in MR patients, aortic valve disease patients, and normal subjects. Results Plasma angiotensin II concentrations did not significantly differ between MR patients and aortic valve disease patients (P = 0.582). Compared to normal controls, however, MR patients had significantly downregulated expressions of angiotensin-converting enzyme, angiotensin I converting enzyme 2, type 1 angiotensin II receptor, glutamyl aminopeptidase, angiotensinogen, cathepsin A (CTSA), thimet oligopeptidase 1, neurolysin, alanyl aminopeptidase, cathepsin G, leucyl/cystinyl aminopeptidase (LNPEP), neprilysin, and carboxypeptidase A3 in the left atrium. The MR patients also had significantly upregulated expressions of MAS1 oncogene (MAS1) and mineralocorticoid receptor compared to normal controls. Additionally, in comparison with aortic valve disease patients, MR patients had significantly downregulated CTSA and LNPEP expression and significantly upregulated MAS1 expression in the left atrium. Conclusions Expressions of genes in the renin-angiotensin system, especially CTSA, LNPEP, and MAS1, in the left atrium in MR patients significantly differed from expressions of these genes in aortic valve disease patients and normal controls. Notably, differences in expression were independent of circulating angiotensin II levels. The results of this study provide a rationale for pharmacological therapies or posttranslational regulation therapies targeting genes expressed differentially in the renin-angiotensin system to remedy structural remodeling associated with atrial enlargement and heart failure progression in patients with MR.
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Abrahão MV, Dos Santos NFT, Kuwabara WMT, do Amaral FG, do Carmo Buonfiglio D, Peres R, Vendrame RFA, Flávio da Silveira P, Cipolla-Neto J, Baltatu OC, Afeche SC. Identification of insulin-regulated aminopeptidase (IRAP) in the rat pineal gland and the modulation of melatonin synthesis by angiotensin IV. Brain Res 2018; 1704:40-46. [PMID: 30222958 DOI: 10.1016/j.brainres.2018.09.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/29/2018] [Accepted: 09/11/2018] [Indexed: 02/06/2023]
Abstract
A local renin-angiotensin system (RAS) has been postulated in the pineal gland. In addition to angiotensin II (Ang II), other active metabolites have been described. In this study, we aimed to investigate a role for Ang IV in melatonin synthesis and the presence of its proposed (IRAP)/AT4 receptor (insulin-regulated aminopeptidase) in the pineal gland. The effect of Ang IV on melatonin synthesis was investigated in vitro using isolated pinealocytes. IRAP protein expression and activity were evaluated by Western blot and fluorimetry using Leu-4Me-β-naphthylamide as a substrate. Melatonin was analyzed by HPLC, calcium content by confocal microscopy and cAMP by immunoassay. Ang IV significantly augmented the NE-induced melatonin synthesis to a similar degree as that achieved by Ang II. This Ang IV effect in pinealocytes appears to be mediated by an increase in the intracellular calcium content but not by cAMP. The (IRAP)/AT4 expression and activity were identified in the pineal gland, which were significantly higher in membrane fractions than in soluble fractions. Ang IV significantly reduced IRAP activity in the pineal membrane fractions. The main findings of the present study are as follows: (1) Ang IV potentiates NE-stimulated melatonin production in pinealocytes, (2) the (IRAP)/AT4 receptor is present in the rat pineal gland, and (3) Ang IV inhibits IRAP activity and increases pinealocytes [Ca2+]i. We conclude that Ang IV is an important component of RAS and modulates melatonin synthesis in the rat pineal gland.
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Affiliation(s)
| | | | - Wilson Mitsuo Tatagiba Kuwabara
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Fernanda Gaspar do Amaral
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil; Department of Physiology, Federal University of São Paulo, 04023-901 São Paulo, SP, Brazil
| | - Daniella do Carmo Buonfiglio
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Rafael Peres
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | | | | | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Ovidiu Constantin Baltatu
- Center of Innovation, Technology and Education (CITE), Anhembi Morumbi University-Laureate International Universities, 12247-016 São José dos Campos, SP, Brazil
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Weimershaus M, Mauvais FX, Saveanu L, Adiko C, Babdor J, Abramova A, Montealegre S, Lawand M, Evnouchidou I, Huber KJ, Chadt A, Zwick M, Vargas P, Dussiot M, Lennon-Dumenil AM, Brocker T, Al-Hasani H, van Endert P. Innate Immune Signals Induce Anterograde Endosome Transport Promoting MHC Class I Cross-Presentation. Cell Rep 2018; 24:3568-3581. [DOI: 10.1016/j.celrep.2018.08.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 06/14/2018] [Accepted: 08/15/2018] [Indexed: 12/22/2022] Open
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Agopiantz M, Xandre-Rodriguez L, Jin B, Urbistondoy G, Ialy-Radio C, Chalbi M, Wolf JP, Ziyyat A, Lefèvre B. Growth arrest specific 1 (Gas1) and glial cell line-derived neurotrophic factor receptor α1 (Gfrα1), two mouse oocyte glycosylphosphatidylinositol-anchored proteins, are involved in fertilisation. Reprod Fertil Dev 2018; 29:824-837. [PMID: 28442042 DOI: 10.1071/rd15367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 12/10/2015] [Indexed: 12/25/2022] Open
Abstract
Recently, Juno, the oocyte receptor for Izumo1, a male immunoglobulin, was discovered. Juno is an essential glycosylphosphatidylinositol (GIP)-anchored protein. This result did not exclude the participation of other GIP-anchored proteins in this process. After bibliographic and database searches we selected five GIP-anchored proteins (Cpm, Ephrin-A4, Gas1, Gfra1 and Rgmb) as potential oocyte candidates participating in fertilisation. Western blot and immunofluorescence analyses showed that only three were present on the mouse ovulated oocyte membrane and, of these, only two were clearly involved in the fertilisation process, namely growth arrest specific 1 (Gas1) and glial cell line-derived neurotrophic factor receptor α1 (Gfrα1). This was demonstrated by evaluating oocyte fertilisability after treatment of oocytes with antibodies against the selected proteins, with their respective short interference RNA or both. Gfrα1 and Gas1 seem to be neither redundant nor synergistic. In conclusion, oocyte Gas1 and Gfrα1 are both clearly involved in fertilisation.
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Affiliation(s)
- M Agopiantz
- Inserm, U1016, Institut Cochin, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - L Xandre-Rodriguez
- Université Paris Descartes, Sorbonne Paris Cité, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - B Jin
- Université Paris Descartes, Sorbonne Paris Cité, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - G Urbistondoy
- Université Paris Descartes, Sorbonne Paris Cité, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - C Ialy-Radio
- Inserm, U1016, Institut Cochin, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - M Chalbi
- Inserm, U1016, Institut Cochin, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - J-P Wolf
- Service d'Histologie Embryologie Biologie de la Reproduction - CECOS, Hôpital Cochin, AP-HP, F75014 Paris, France
| | - A Ziyyat
- Inserm, U1016, Institut Cochin, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - B Lefèvre
- Inserm, U1016, Institut Cochin, 24 rue du Faubourg Saint-Jacques, 75014, Paris, France
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Kondo T, Nakamura M, Kitano S, Kawashima J, Matsumura T, Ohba T, Yamaguchi M, Katabuchi H, Araki E. The clinical course and pathophysiological investigation of adolescent gestational diabetes insipidus: a case report. BMC Endocr Disord 2018; 18:4. [PMID: 29378555 PMCID: PMC5789627 DOI: 10.1186/s12902-018-0234-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/23/2018] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Gestational diabetes insipidus (GDI) is a rare endocrine complication during pregnancy that is associated with vasopressinase overproduction from the placenta. Although increased vasopressinase is associated with placental volume, the regulation of placental growth in the later stage of pregnancy is not well known. CASE PRESENTATION A 16-year-old pregnant woman was urgently transferred to our hospital because of threatened premature labor when the Kumamoto earthquakes hit the area where she lived. During her hospitalization, she complained of gradually increasing symptoms of polyuria and polydipsia. The serum level of arginine vasopressin (AVP) was 1.7 pg/mL, which is inconsistent with central DI. The challenge of diagnostic treatment using oral 1-deamino-8-D-AVP (DDAVP) successfully controlled her urine and allowed for normal delivery. DDAVP tablets were not necessary to control her polyuria thereafter. Based on these observations, clinical diagnosis of GDI was confirmed. Pathophysiological analyses revealed that vasopressinase expression was more abundant in the GDI patient's syncytiotrophoblast in placenta compared with that in a control subject. Serum vasopressinase was also observed during gestation and disappeared soon after delivery. Vasopressinase is reportedly identical to oxytocinase or insulin regulated aminopeptidase (IRAP), which is an abundant cargo protein associated with the glucose transporter 4 (GLUT4) storage vesicle. Interestingly, the expression and subcellular localization of GLUT4 appeared to occur in a vasopressinase (IRAP)-dependent manner. CONCLUSION Because placental volume may be associated with vasopressinase overproduction in GDI, vasopressinase (IRAP)/GLUT4 association appears to contribute to the growth of placenta in this case.
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Affiliation(s)
- Tatsuya Kondo
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Miwa Nakamura
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Sayaka Kitano
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Junji Kawashima
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Takeshi Matsumura
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Takashi Ohba
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Munekage Yamaguchi
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Hidetaka Katabuchi
- Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
| | - Eiichi Araki
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, 1-1-1 Chuo-Ward, Honjo, Kumamoto, 860-8556 Japan
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Haeusler RA, McGraw TE, Accili D. Biochemical and cellular properties of insulin receptor signalling. Nat Rev Mol Cell Biol 2018; 19:31-44. [PMID: 28974775 PMCID: PMC5894887 DOI: 10.1038/nrm.2017.89] [Citation(s) in RCA: 401] [Impact Index Per Article: 66.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The mechanism of insulin action is a central theme in biology and medicine. In addition to the rather rare condition of insulin deficiency caused by autoimmune destruction of pancreatic β-cells, genetic and acquired abnormalities of insulin action underlie the far more common conditions of type 2 diabetes, obesity and insulin resistance. The latter predisposes to diseases ranging from hypertension to Alzheimer disease and cancer. Hence, understanding the biochemical and cellular properties of insulin receptor signalling is arguably a priority in biomedical research. In the past decade, major progress has led to the delineation of mechanisms of glucose transport, lipid synthesis, storage and mobilization. In addition to direct effects of insulin on signalling kinases and metabolic enzymes, the discovery of mechanisms of insulin-regulated gene transcription has led to a reassessment of the general principles of insulin action. These advances will accelerate the discovery of new treatment modalities for diabetes.
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Affiliation(s)
- Rebecca A Haeusler
- Columbia University College of Physicians and Surgeons, Department of Pathology and Cell Biology, New York, New York 10032, USA
| | - Timothy E McGraw
- Weill Cornell Medicine, Departments of Biochemistry and Cardiothoracic Surgery, New York, New York 10065, USA
| | - Domenico Accili
- Columbia University College of Physicians & Surgeons, Department of Medicine, New York, New York 10032, USA
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25
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Li J, Matye DJ, Wang Y, Li T. Sortilin 1 knockout alters basal adipose glucose metabolism but not diet-induced obesity in mice. FEBS Lett 2017; 591:1018-1028. [PMID: 28236654 DOI: 10.1002/1873-3468.12610] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/10/2017] [Accepted: 02/21/2017] [Indexed: 01/14/2023]
Abstract
Sortilin 1 (Sort1) is a trafficking receptor that has been implicated in the regulation of plasma cholesterol in humans and mice. Here, we use metabolomics and hyperinsulinemic-euglycemic clamp approaches to obtain further understanding of the in vivo effects of Sort1 deletion on diet-induced obesity as well as on adipose lipid and glucose metabolism. Results show that Sort1 knockout (KO) does not affect Western diet-induced obesity nor adipose fatty acid and ceramide concentrations. Under the basal fasting state, chow-fed Sort1 KO mice have decreased adipose glycolytic metabolites, but Sort1 deletion does not affect insulin-stimulated tissue glucose uptake during the insulin clamp. These results suggest that Sort1 loss-of-function in vivo does not affect obesity development, but differentially modulates adipose glucose metabolism under fasting and insulin-stimulated states.
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Affiliation(s)
- Jibiao Li
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, KS, USA
| | - David J Matye
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, KS, USA
| | - Yifeng Wang
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, KS, USA
| | - Tiangang Li
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, KS, USA
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26
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Kobayashi H, Nomura S, Mitsui T, Ito T, Kuno N, Ohno Y, Kadomatsu K, Muramatsu T, Nagasaka T, Mizutani S. Tissue Distribution of Placental Leucine Aminopeptidase/Oxytocinase During Mouse Pregnancy. J Histochem Cytochem 2016; 52:113-21. [PMID: 14688222 DOI: 10.1177/002215540405200111] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Placental leucine aminopeptidase (P-LAP), also called oxytocinase, is an enzyme responsible for hydrolyzing oxytocin. This enzyme is identical to cystine aminopeptidase. We examined the tissue distribution of P-LAP in normal adult mice and also in mothers and fetuses during mouse pregnancy using immunohistochemical (IHC) analysis. P-LAP-immunoreactive protein was expressed in various organs in a cell- and gestational stage-dependent manner. In the kidney, P-LAP was located in distal and collecting tubules but not in proximal tubules. The islet of Langerhans in the maternal pancreas stained positively for P-LAP in the periphery in early gestation. This staining pattern changed so that both the periphery and inner cells were positive during mid-gestation and finally only inner cells were positive in late gestation. Among the hematopoietic cells in the fetal liver, only megakaryocytes showed strong expression of P-LAP. The staining intensity increased with gestation on the apical surface of trophoblasts in the placental labyrinth. These data demonstrate that P-LAP is present in a variety of tissues, and its presence is affected by pregnancy and fetal development. Therefore, P-LAP may play a significant role in various physiological processes in non-pregnant, pregnant, and fetal mice.
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Affiliation(s)
- Honami Kobayashi
- Departments of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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27
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Alponti RF, Alves PL, Silveira PF. Novel adipocyte aminopeptidases are selectively upregulated by insulin in healthy and obese rats. J Endocrinol 2016; 228:97-104. [PMID: 26577934 DOI: 10.1530/joe-15-0266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/17/2015] [Indexed: 12/17/2022]
Abstract
The lack of a complete assembly of the sensitivity of subcellular aminopeptidase (AP) activities to insulin in different pathophysiological conditions has hampered the complete view of the adipocyte metabolic pathways and its implications in these conditions. Here we investigated the influence of insulin on basic AP (APB), neutral puromycin-sensitive AP (PSA), and neutral puromycin-insensitive AP (APM) in high and low density microsomal and plasma membrane fractions from adipocytes of healthy and obese rats. Catalytic activities of these enzymes were fluorometrically monitoring in these fractions with or without insulin stimulus. Canonical traffic such as insulin-regulated AP was not detected for these novel adipocyte APs in healthy and obese rats. However, insulin increased APM in low density microsomal and plasma membrane fractions from healthy rats, APB in high density microsomal fraction from obese rats and PSA in plasma membrane fraction from healthy rats. A new concept of intracellular compartment-dependent upregulation of AP enzyme activities by insulin emerges from these data. This relatively selective regulation has pathophysiological significance, since these enzymes are well known to act as catalysts and receptor of peptides directly related to energy metabolism. Overall, the regulation of each one of these enzyme activities reflects certain dysfunction in obese individuals.
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Affiliation(s)
- Rafaela Fadoni Alponti
- Laboratory of PharmacologyUnit of Translational Endocrine Physiology and Pharmacology, Instituto Butantan, Avenida Vital Brasil, 1500, CEP05503-900 Sao Paulo, BrazilDepartment of PhysiologyUniversidade de Sao Paulo, Sao Paulo, Brazil Laboratory of PharmacologyUnit of Translational Endocrine Physiology and Pharmacology, Instituto Butantan, Avenida Vital Brasil, 1500, CEP05503-900 Sao Paulo, BrazilDepartment of PhysiologyUniversidade de Sao Paulo, Sao Paulo, Brazil
| | - Patricia Lucio Alves
- Laboratory of PharmacologyUnit of Translational Endocrine Physiology and Pharmacology, Instituto Butantan, Avenida Vital Brasil, 1500, CEP05503-900 Sao Paulo, BrazilDepartment of PhysiologyUniversidade de Sao Paulo, Sao Paulo, Brazil
| | - Paulo Flavio Silveira
- Laboratory of PharmacologyUnit of Translational Endocrine Physiology and Pharmacology, Instituto Butantan, Avenida Vital Brasil, 1500, CEP05503-900 Sao Paulo, BrazilDepartment of PhysiologyUniversidade de Sao Paulo, Sao Paulo, Brazil
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28
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Alponti RF, Silveira PF. Adipocyte aminopeptidases in obesity and fasting. Mol Cell Endocrinol 2015; 415:24-31. [PMID: 26257241 DOI: 10.1016/j.mce.2015.07.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Revised: 07/13/2015] [Accepted: 07/31/2015] [Indexed: 12/14/2022]
Abstract
This study checked the existence of a diverse array of aminopeptidase (AP) enzymes in high (HDM) and low (LDM) density microsomal and plasma membrane (MF) fractions from adipocytes of control, monosodium glutamate obese and food deprived rats. Gene expression was detected for ArgAP, AspAP, MetAP, and two AlaAP (APM and PSA). APM and PSA had the highest catalytic efficiency, whereas AspAP the highest affinity. Subcellular distribution of AP activities depended on metabolic status. Comparing catalytic levels, AspAP in HDM, LDM and MF was absent in obese and control under food deprivation; PSA in LDM was 3.5-times higher in obese than in normally fed control and control and obese under food deprivation; MetAP in MF was 4.5-times higher in obese than in food deprived obese. Data show new AP enzymes genetically expressed in subcellular compartments of adipocytes, three of them with altered catalytic levels that respond to whole-body energetic demands.
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Affiliation(s)
- Rafaela Fadoni Alponti
- Laboratory of Pharmacology, Instituto Butantan, Av. Vital Brasil, 1500, 05503-900, Sao Paulo, Brazil; Department of Physiology, Universidade de Sao Paulo, Rua do Matao, Travessa 14, 101, 05508-900, Sao Paulo, Brazil
| | - Paulo Flavio Silveira
- Laboratory of Pharmacology, Instituto Butantan, Av. Vital Brasil, 1500, 05503-900, Sao Paulo, Brazil.
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29
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Fazakerley DJ, Naghiloo S, Chaudhuri R, Koumanov F, Burchfield JG, Thomas KC, Krycer JR, Prior MJ, Parker BL, Murrow BA, Stöckli J, Meoli CC, Holman GD, James DE. Proteomic Analysis of GLUT4 Storage Vesicles Reveals Tumor Suppressor Candidate 5 (TUSC5) as a Novel Regulator of Insulin Action in Adipocytes. J Biol Chem 2015; 290:23528-42. [PMID: 26240143 PMCID: PMC4583025 DOI: 10.1074/jbc.m115.657361] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Indexed: 01/09/2023] Open
Abstract
Insulin signaling augments glucose transport by regulating glucose transporter 4 (GLUT4) trafficking from specialized intracellular compartments, termed GLUT4 storage vesicles (GSVs), to the plasma membrane. Proteomic analysis of GSVs by mass spectrometry revealed enrichment of 59 proteins in these vesicles. We measured reduced abundance of 23 of these proteins following insulin stimulation and assigned these as high confidence GSV proteins. These included established GSV proteins such as GLUT4 and insulin-responsive aminopeptidase, as well as six proteins not previously reported to be localized to GSVs. Tumor suppressor candidate 5 (TUSC5) was shown to be a novel GSV protein that underwent a 3.7-fold increase in abundance at the plasma membrane in response to insulin. siRNA-mediated knockdown of TUSC5 decreased insulin-stimulated glucose uptake, although overexpression of TUSC5 had the opposite effect, implicating TUSC5 as a positive regulator of insulin-stimulated glucose transport in adipocytes. Incubation of adipocytes with TNFα caused insulin resistance and a concomitant reduction in TUSC5. Consistent with previous studies, peroxisome proliferator-activated receptor (PPAR) γ agonism reversed TNFα-induced insulin resistance. TUSC5 expression was necessary but insufficient for PPARγ-mediated reversal of insulin resistance. These findings functionally link TUSC5 to GLUT4 trafficking, insulin action, insulin resistance, and PPARγ action in the adipocyte. Further studies are required to establish the exact role of TUSC5 in adipocytes.
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Affiliation(s)
- Daniel J Fazakerley
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Sheyda Naghiloo
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Rima Chaudhuri
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Françoise Koumanov
- the Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - James G Burchfield
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Kristen C Thomas
- From the Charles Perkins Centre, School of Molecular Bioscience, and
| | - James R Krycer
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Matthew J Prior
- The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Ben L Parker
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Beverley A Murrow
- The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Jacqueline Stöckli
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Christopher C Meoli
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and
| | - Geoffrey D Holman
- the Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - David E James
- From the Charles Perkins Centre, School of Molecular Bioscience, and The Garvan Institute of Medical Research, Sydney, New South Wales 2010, Australia, and School of Medicine, University of Sydney, Sydney, New South Wales 2006, Australia,
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Niwa M, Numaguchi Y, Ishii M, Kuwahata T, Kondo M, Shibata R, Miyata K, Oike Y, Murohara T. IRAP deficiency attenuates diet-induced obesity in mice through increased energy expenditure. Biochem Biophys Res Commun 2015; 457:12-8. [DOI: 10.1016/j.bbrc.2014.12.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 12/12/2014] [Indexed: 11/29/2022]
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Govers R. Molecular mechanisms of GLUT4 regulation in adipocytes. DIABETES & METABOLISM 2014; 40:400-10. [DOI: 10.1016/j.diabet.2014.01.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/24/2014] [Accepted: 01/26/2014] [Indexed: 01/28/2023]
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Antidiabetic Effect of Methanolic Extract from Berberis julianae Schneid. via Activation of AMP-Activated Protein Kinase in Type 2 Diabetic Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:106206. [PMID: 25258641 PMCID: PMC4167208 DOI: 10.1155/2014/106206] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 08/09/2014] [Accepted: 08/12/2014] [Indexed: 01/14/2023]
Abstract
We have investigated the antidiabetic effect and mechanism of methanolic extract of Berberis julianae Schneid. (BJSME) in STZ induced Type 2 diabetes mellitus mice. T2DM mice were induced by high fat diet and low dose streptozotocin (STZ). BJSME was orally administrated at the doses of 60, 120, and 240 mg/kg/d, for 21 days. Metformin was used as positive control drug. Food intake, body weight, plasma glucose, oral glucose tolerance test, insulin tolerance test, insulin, and blood-lipid content were measured. The effects of BJSME on the glucose transporter 4 (GLUT4) translocation in L6 myotubes and the GLUT4 protein expression in skeletal muscle as well as phosphorylation of the AMP-activated protein kinase (AMPK) in liver and muscle were examined. In vitro and in vivo results indicate that BJSME increased GLUT4 translocation by 1.8-fold and BJSME significantly improved the oral glucose tolerance and low density lipoprotein cholesterol (LDL-C) of serum and reduced body weight, glucose, and other related blood-lipid contents. The BJSME treatment also stimulated the phosphorylation of AMPK. Thus, BJSME seems to possess promising beneficial effects for the treatment of T2DM with the possible mechanism via stimulating AMPK activity.
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Abstract
GLUT4 is regulated by its intracellular localization. In the absence of insulin, GLUT4 is efficiently retained intracellularly within storage compartments in muscle and fat cells. Upon insulin stimulation (and contraction in muscle), GLUT4 translocates from these compartments to the cell surface where it transports glucose from the extracellular milieu into the cell. Its implication in insulin-regulated glucose uptake makes GLUT4 not only a key player in normal glucose homeostasis but also an important element in insulin resistance and type 2 diabetes. Nevertheless, how GLUT4 is retained intracellularly and how insulin acts on this retention mechanism is largely unclear. In this review, the current knowledge regarding the various molecular processes that govern GLUT4 physiology is discussed as well as the questions that remain.
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34
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The renin-angiotensin system in adipose tissue and its metabolic consequences during obesity. J Nutr Biochem 2013; 24:2003-15. [PMID: 24120291 DOI: 10.1016/j.jnutbio.2013.07.002] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 05/24/2013] [Accepted: 07/22/2013] [Indexed: 02/07/2023]
Abstract
Obesity is a worldwide disease that is accompanied by several metabolic abnormalities such as hypertension, hyperglycemia and dyslipidemia. The accelerated adipose tissue growth and fat cell hypertrophy during the onset of obesity precedes adipocyte dysfunction. One of the features of adipocyte dysfunction is dysregulated adipokine secretion, which leads to an imbalance of pro-inflammatory, pro-atherogenic versus anti-inflammatory, insulin-sensitizing adipokines. The production of renin-angiotensin system (RAS) components by adipocytes is exacerbated during obesity, contributing to the systemic RAS and its consequences. Increased adipose tissue RAS has been described in various models of diet-induced obesity (DIO) including fructose and high-fat feeding. Up-regulation of the adipose RAS by DIO promotes inflammation, lipogenesis and reactive oxygen species generation and impairs insulin signaling, all of which worsen the adipose environment. Consequently, the increase of circulating RAS, for which adipose tissue is partially responsible, represents a link between hypertension, insulin resistance in diabetes and inflammation during obesity. However, other nutrients and food components such as soy protein attenuate adipose RAS, decrease adiposity, and improve adipocyte functionality. Here, we review the molecular mechanisms by which adipose RAS modulates systemic RAS and how it is enhanced in obesity, which will explain the simultaneous development of metabolic syndrome alterations. Finally, dietary interventions that prevent obesity and adipocyte dysfunction will maintain normal RAS concentrations and effects, thus preventing metabolic diseases that are associated with RAS enhancement.
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HÄRDTNER CARMEN, MÖRKE CAROLINE, WALTHER REINHARD, WOLKE CARMEN, LENDECKEL UWE. High glucose activates the alternative ACE2/Ang-(1-7)/Mas and APN/Ang IV/IRAP RAS axes in pancreatic β-cells. Int J Mol Med 2013; 32:795-804. [PMID: 23942780 PMCID: PMC3812297 DOI: 10.3892/ijmm.2013.1469] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/22/2013] [Indexed: 01/13/2023] Open
Abstract
The activation of the classical angiotensin (Ang)-converting enzyme (ACE)/Ang II/Ang II type 1 receptor (AT1R) axis of the renin-angiotensin system (RAS) has been associated with islet dysfunction and insulin resistance. Hyperglycaemia, hypertension and obesity, major components of metabolic syndrome, are all associated with increased systemic and tissue levels of Ang II. Whereas it is well established that Ang II, by binding to AT1R, impairs glucose-stimulated insulin secretion and insulin signaling, the contribution of alternative RAS axes to β-cell function remains to be fully elucidated. In this study, using the BRIN-BD11 rat insulinoma cell line, we i) examined the basal expression levels of components of classical and alternative RAS axes and ii) investigated the effects of normal (5.5 mM) and elevated (11, 15, 25 mM) glucose concentrations on their expression and/or enzymatic activity by means of reverse transcription quantitative PCR (RT-qPCR), immunoblot analysis and enzymatic activity assays. The results correlated with the insulin production and release. Essential components of all RAS axes were found to be expressed in the BRIN-BD11 cells. Components of the alternative RAS axes, ACE2, neutral endopeptidase 24.11, Mas receptor (Mas), aminopeptidases A (APA) and N (APN) and insulin-regulated aminopeptidase (IRAP) showed an increased expression/activity in response to high glucose. These alterations were paralleled by the glucose-dependent increase in insulin production and release. By contrast, components of the classical RAS axis, ACE, AT1R and Ang II type 2 receptor (AT2R), remained largely unaffected under these conditions. Glucose induced the activation of the alternative ACE2/Ang-(1-7)/Mas and APN/Ang IV/IRAP RAS axes simultaneously with the stimulation of insulin production/release. Our data suggest the existence of a functional link between the local RAS axis and pancreatic β-cell function; however, further studies are required to confirm this hypothesis.
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Affiliation(s)
- CARMEN HÄRDTNER
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, D-17475 Greifswald, Germany
| | - CAROLINE MÖRKE
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, D-17475 Greifswald, Germany
| | - REINHARD WALTHER
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, D-17475 Greifswald, Germany
| | - CARMEN WOLKE
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, D-17475 Greifswald, Germany
| | - UWE LENDECKEL
- Department of Medical Biochemistry and Molecular Biology, University of Greifswald, D-17475 Greifswald, Germany
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Dokas J, Chadt A, Nolden T, Himmelbauer H, Zierath JR, Joost HG, Al-Hasani H. Conventional knockout of Tbc1d1 in mice impairs insulin- and AICAR-stimulated glucose uptake in skeletal muscle. Endocrinology 2013; 154:3502-14. [PMID: 23892475 DOI: 10.1210/en.2012-2147] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In the obesity-resistant SJL mouse strain, we previously identified a naturally occurring loss-of-function mutation in the gene for Tbc1d1. Characterization of recombinant inbred mice that carried the Tbc1d1(SJL) allele on a C57BL/6J background indicated that loss of TBC1D1 protects from obesity, presumably by increasing the use of fat as energy source. To provide direct functional evidence for an involvement of TBC1D1 in energy substrate metabolism, we generated and characterized conventional Tbc1d1 knockout mice. TBC1D1-deficient mice showed moderately reduced body weight, decreased respiratory quotient, and an elevated resting metabolic rate. Ex vivo analysis of intact isolated skeletal muscle revealed a severe impairment in insulin- and AICAR-stimulated glucose uptake in glycolytic extensor digitorum longus muscle and a substantially increased rate of fatty acid oxidation in oxidative soleus muscle. Our results provide direct evidence that TBC1D1 plays a major role in glucose and lipid utilization, and energy substrate preference in skeletal muscle.
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Affiliation(s)
- Janine Dokas
- Institute for Clinical Biochemistry and Pathobiochemistry, German Diabetes Center, Leibniz Center for Diabetes Research at the Heinrich-Heine-University Düsseldorf, Auf'm Hennekamp 65, 40225 Düsseldorf, Germany.
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Huang G, Buckler-Pena D, Nauta T, Singh M, Asmar A, Shi J, Kim JY, Kandror KV. Insulin responsiveness of glucose transporter 4 in 3T3-L1 cells depends on the presence of sortilin. Mol Biol Cell 2013; 24:3115-22. [PMID: 23966466 PMCID: PMC3784384 DOI: 10.1091/mbc.e12-10-0765] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Insulin-dependent translocation of Glut4 to the plasma membrane of fat and skeletal muscle cells plays the key role in postprandial clearance of blood glucose. In undifferentiated cells, insulin responsiveness of Glut4 depends on the presence of sortilin, whereas sortilin responds to insulin regardless of Glut4 expression. Insulin-dependent translocation of glucose transporter 4 (Glut4) to the plasma membrane of fat and skeletal muscle cells plays the key role in postprandial clearance of blood glucose. Glut4 represents the major cell-specific component of the insulin-responsive vesicles (IRVs). It is not clear, however, whether the presence of Glut4 in the IRVs is essential for their ability to respond to insulin stimulation. We prepared two lines of 3T3-L1 cells with low and high expression of myc7-Glut4 and studied its translocation to the plasma membrane upon insulin stimulation, using fluorescence-assisted cell sorting and cell surface biotinylation. In undifferentiated 3T3-L1 preadipocytes, translocation of myc7-Glut4 was low regardless of its expression levels. Coexpression of sortilin increased targeting of myc7-Glut4 to the IRVs, and its insulin responsiveness rose to the maximal levels observed in fully differentiated adipocytes. Sortilin ectopically expressed in undifferentiated cells was translocated to the plasma membrane regardless of the presence or absence of myc7-Glut4. AS160/TBC1D4 is expressed at low levels in preadipocytes but is induced in differentiation and provides an additional mechanism for the intracellular retention and insulin-stimulated release of Glut4.
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Affiliation(s)
- Guanrong Huang
- Department of Biochemistry, Boston University School of Medicine, Boston, MA 02118
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Mizutani S, Tsunemi T, Mizutani E, Hattori A, Tsujimoto M, Kobayashi H. New insights into the role of aminopeptidases in the treatment for both preeclampsia and preterm labor. Expert Opin Investig Drugs 2013; 22:1425-36. [PMID: 23931642 DOI: 10.1517/13543784.2013.825248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Evidence elucidating the pathophysiology and pharmacology of conventional drugs, β-2 stimulants and magnesium sulfate, on safety and effectiveness for preeclampsia and preterm labor are rarely found. Both compounds pass through the placental barrier and could exert their adverse effects on the fetus. Exposure to these agents could be problematic long after the birth, and possibly result in diseases such as autism and cardiomyopathy. Since 1970 the possible roles of placental aminopeptidases, which degrade peptide hormones, in preeclampsia and preterm labor have been studied. AREAS COVERED Many studies reveal that the fetus secretes peptide hormones, such as angiotensin II, vasopressin, and oxytocin, under hypoxia (stress) during the course of its growth, suggesting the critical effects these hormones have during pregnancy. The roles of placental aminopeptidases, the enzymes which degrade fetal hormones without passing through the placental barrier, were clarified. A first-step production system for recombinant aminopeptidases was established, by which engineered recombinant aminopeptidases were used for further experiments testing expected efficacy on controlling the level of hormones. EXPERT OPINION The authors conclude that both aminopeptidase A and placental leucine aminopeptidase could be potentially safe and effective drugs for patients and their babies in the treatment of preeclampsia and preterm labor.
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Affiliation(s)
- Shigehiko Mizutani
- Daiya Building Ladys' Clinic , 1F, No.2, 3-15-1, Meieki, Nakamura-ku, Nagoya, 450-0002 , Japan
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Lansey MN, Walker NN, Hargett SR, Stevens JR, Keller SR. Deletion of Rab GAP AS160 modifies glucose uptake and GLUT4 translocation in primary skeletal muscles and adipocytes and impairs glucose homeostasis. Am J Physiol Endocrinol Metab 2012; 303:E1273-86. [PMID: 23011063 PMCID: PMC3517634 DOI: 10.1152/ajpendo.00316.2012] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Tight control of glucose uptake in skeletal muscles and adipocytes is crucial to glucose homeostasis and is mediated by regulating glucose transporter GLUT4 subcellular distribution. In cultured cells, Rab GAP AS160 controls GLUT4 intracellular retention and release to the cell surface and consequently regulates glucose uptake into cells. To determine AS160 function in GLUT4 trafficking in primary skeletal muscles and adipocytes and investigate its role in glucose homeostasis, we characterized AS160 knockout (AS160(-/-)) mice. We observed increased and normal basal glucose uptake in isolated AS160(-/-) adipocytes and soleus, respectively, while insulin-stimulated glucose uptake was impaired and GLUT4 expression decreased in both. No such abnormalities were found in isolated AS160(-/-) extensor digitorum longus muscles. In plasma membranes isolated from AS160(-/-) adipose tissue and gastrocnemius/quadriceps, relative GLUT4 levels were increased under basal conditions and remained the same after insulin treatment. Concomitantly, relative levels of cell surface-exposed GLUT4, determined with a glucose transporter photoaffinity label, were increased in AS160(-/-) adipocytes and normal in AS160(-/-) soleus under basal conditions. Insulin augmented cell surface-exposed GLUT4 in both. These observations suggest that AS160 is essential for GLUT4 intracellular retention and regulation of glucose uptake in adipocytes and skeletal muscles in which it is normally expressed. In vivo studies revealed impaired insulin tolerance in the presence of normal (male) and impaired (female) glucose tolerance. Concurrently, insulin-elicited increases in glucose disposal were abolished in all AS160(-/-) skeletal muscles and liver but not in AS160(-/-) adipose tissues. This suggests AS160 as a target for differential manipulation of glucose homeostasis.
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Affiliation(s)
- Melissa N Lansey
- Dept. of Medicine/Division of Endocrinology, Univ. of Virginia, Charlottesville, VA 22908, USA.
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The Rab GTPase-activating protein TBC1D4/AS160 contains an atypical phosphotyrosine-binding domain that interacts with plasma membrane phospholipids to facilitate GLUT4 trafficking in adipocytes. Mol Cell Biol 2012; 32:4946-59. [PMID: 23045393 DOI: 10.1128/mcb.00761-12] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The Rab GTPase-activating protein TBC1D4/AS160 regulates GLUT4 trafficking in adipocytes. Nonphosphorylated AS160 binds to GLUT4 vesicles and inhibits GLUT4 translocation, and AS160 phosphorylation overcomes this inhibitory effect. In the present study we detected several new functional features of AS160. The second phosphotyrosine-binding domain in AS160 encodes a phospholipid-binding domain that facilitates plasma membrane (PM) targeting of AS160, and this function is conserved in other related RabGAP/Tre-2/Bub2/Cdc16 (TBC) proteins and an AS160 ortholog in Drosophila. This region also contains a nonoverlapping intracellular GLUT4-containing storage vesicle (GSV) cargo-binding site. The interaction of AS160 with GSVs and not with the PM confers the inhibitory effect of AS160 on insulin-dependent GLUT4 translocation. Constitutive targeting of AS160 to the PM increased the surface GLUT4 levels, and this was attributed to both enhanced AS160 phosphorylation and 14-3-3 binding and inhibition of AS160 GAP activity. We propose a model wherein AS160 acts as a regulatory switch in the docking and/or fusion of GSVs with the PM.
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Wakeling EN, Joussemet B, Costiou P, Fanuel D, Moullier P, Barkats M, Fyfe JC. Failure of lower motor neuron radial outgrowth precedes retrograde degeneration in a feline model of spinal muscular atrophy. J Comp Neurol 2012; 520:1737-50. [PMID: 22120001 DOI: 10.1002/cne.23010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Feline spinal muscular atrophy (SMA) is a fully penetrant, autosomal recessive lower motor neuron disease in domestic cats that clinically resembles human SMA Type III. A whole genome linkage scan identified a ∼140-kb deletion that abrogates expression of LIX1, a novel SMA candidate gene of unknown function. To characterize the progression of feline SMA, we assessed pathological changes in muscle and spinal cord from 3 days of age to beyond onset of clinical signs. Electromyographic (EMG) analysis indicating denervation occurred between 10 and 12 weeks, with the first neurological signs occurring at the same time. Compound motor action potential (CMAP) amplitudes were significantly reduced in the soleus and extensor carpi radialis muscles at 8-11 weeks. Quadriceps femoris muscle fibers from affected cats appeared smaller at 10 weeks; by 12 weeks atrophic fibers were more prevalent than in age-matched controls. In affected cats, significant loss of L5 ventral root axons was observed at 12 weeks. By 21 weeks of age, affected cats had 40% fewer L5 motor axons than normal. There was no significant difference in total L5 soma number, even at 21 weeks; thus degeneration begins distal to the cell body and proceeds retrogradely. Morphometric analysis of L5 ventral roots and horns revealed that 4 weeks prior to axon loss, motor axons in affected cats failed to undergo radial enlargement, suggesting a role for the putative disease gene LIX1 in radial growth of axons.
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Affiliation(s)
- Erin N Wakeling
- Genetics Program, Michigan State University East Lansing, Michigan 48824, USA.
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Abstract
To enhance glucose uptake into muscle and fat cells, insulin stimulates the translocation of GLUT4 glucose transporters from intracellular membranes to the cell surface. This response requires the intersection of insulin signaling and vesicle trafficking pathways, and it is compromised in the setting of overnutrition to cause insulin resistance. Insulin signals through AS160/Tbc1D4 and Tbc1D1 to modulate Rab GTPases and through the Rho GTPase TC10α to act on other targets. In unstimulated cells, GLUT4 is incorporated into specialized storage vesicles containing IRAP, LRP1, sortilin, and VAMP2, which are sequestered by TUG, Ubc9, and other proteins. Insulin mobilizes these vesicles directly to the plasma membrane, and it modulates the trafficking itinerary so that cargo recycles from endosomes during ongoing insulin exposure. Knowledge of how signaling and trafficking pathways are coordinated will be essential to understanding the pathogenesis of diabetes and the metabolic syndrome and may also inform a wide range of other physiologies.
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Affiliation(s)
- Jonathan S Bogan
- Section of Endocrinology and Metabolism, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut 06520-8020, USA.
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The Axin/TNKS complex interacts with KIF3A and is required for insulin-stimulated GLUT4 translocation. Cell Res 2012; 22:1246-57. [PMID: 22473005 PMCID: PMC3411167 DOI: 10.1038/cr.2012.52] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Insulin-stimulated glucose uptake by the glucose transporter GLUT4 plays a central role in whole-body glucose homeostasis, dysregulation of which leads to type 2 diabetes. However, the molecular components and mechanisms regulating insulin-stimulated glucose uptake remain largely unclear. Here, we demonstrate that Axin interacts with the ADP-ribosylase tankyrase 2 (TNKS2) and the kinesin motor protein KIF3A, forming a ternary complex crucial for GLUT4 translocation in response to insulin. Specific knockdown of the individual components of the complex attenuated insulin-stimulated GLUT4 translocation to the plasma membrane. Importantly, TNKS2(-/-) mice exhibit reduced insulin sensitivity and higher blood glucose levels when re-fed after fasting. Mechanistically, we demonstrate that in the absence of insulin, Axin, TNKS and KIF3A are co-localized with GLUT4 on the trans-Golgi network. Insulin treatment suppresses the ADP-ribosylase activity of TNKS, leading to a reduction in ADP ribosylation and ubiquitination of both Axin and TNKS, and a concurrent stabilization of the complex. Inhibition of Akt, the major effector kinase of insulin signaling, abrogates the insulin-mediated complex stabilization. We have thus elucidated a new protein complex that is directly associated with the motor protein kinesin in insulin-stimulated GLUT4 translocation.
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Saveanu L, van Endert P. The role of insulin-regulated aminopeptidase in MHC class I antigen presentation. Front Immunol 2012; 3:57. [PMID: 22566938 PMCID: PMC3342382 DOI: 10.3389/fimmu.2012.00057] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 03/03/2012] [Indexed: 01/08/2023] Open
Abstract
Production of MHC-I ligands from antigenic proteins generally requires multiple proteolytic events. While the proteolytic steps required for antigen processing in the endogenous pathway are clearly established, persisting gaps of knowledge regarding putative cross-presentation compartments have made it difficult to map the precise proteolytic events required for generation of cross-presented antigens. It is only in the past decade that the importance of aminoterminal trimming as the final step in the endogenous presentation pathway has been recognized and that the corresponding enzymes have been described. This review focuses on the aminoterminal trimming of exogenous cross-presented peptides, with particular emphasis on the identification of insulin responsive aminopeptidase (IRAP) as the principal trimming aminopeptidase in endosomes and phagosomes.
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Affiliation(s)
- Loredana Saveanu
- Institut National de la Santé et de le Recherche Médicale Paris, France
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Albiston AL, Diwakarla S, Fernando RN, Mountford SJ, Yeatman HR, Morgan B, Pham V, Holien JK, Parker MW, Thompson PE, Chai SY. Identification and development of specific inhibitors for insulin-regulated aminopeptidase as a new class of cognitive enhancers. Br J Pharmacol 2012; 164:37-47. [PMID: 21470200 DOI: 10.1111/j.1476-5381.2011.01402.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Two structurally distinct peptides, angiotensin IV and LVV-haemorphin 7, both competitive high-affinity inhibitors of insulin-regulated aminopeptidase (IRAP), were found to enhance aversion-associated and spatial memory in normal rats and to improve performance in a number of memory tasks in rat deficits models. These findings provide compelling support for the development of specific, high-affinity inhibitors of the enzyme as new cognitive enhancing agents. Different classes of IRAP inhibitors have been developed including peptidomimetics and small molecular weight compounds identified through in silico screening with a homology model of the catalytic domain of IRAP. The proof of principal that inhibition of IRAP activity results in facilitation of memory has been obtained by the demonstration that the small-molecule IRAP inhibitors also exhibit memory-enhancing properties.
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Affiliation(s)
- Anthony L Albiston
- Howard Florey Institute, University of Melbourne, Parkville, Victoria, Australia
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Weimershaus M, Maschalidi S, Sepulveda F, Manoury B, van Endert P, Saveanu L. Conventional Dendritic Cells Require IRAP-Rab14 Endosomes for Efficient Cross-Presentation. THE JOURNAL OF IMMUNOLOGY 2012; 188:1840-6. [DOI: 10.4049/jimmunol.1101504] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wakeling EN, Fyfe JC. Lix1 knockout mouse does not exhibit spinal muscular atrophy phenotype. J Hered 2011; 102 Suppl 1:S32-9. [PMID: 21846745 DOI: 10.1093/jhered/esr031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Feline spinal muscular atrophy (SMA) is an autosomal recessive juvenile onset lower motor neuron disease caused by an ∼ 140 kb deletion that disrupts expression of 2 genes, limb expression 1 (LIX1) and leucyl/cystinyl aminopeptidase (LNPEP). A previously generated Lnpep knockout (KO) mouse did not demonstrate a neuromuscular phenotype. Little is known about LIX1, except that it is evolutionarily conserved and highly expressed in spinal cord motor neurons. To determine whether loss of LIX1 alone is responsible for the feline SMA phenotype, a Lix1 intron 1 gene trap KO mouse line was obtained from Lexicon Genetics, Inc. Mating of F(1) heterozygotes produced offspring in the expected Mendelian ratios. KO and normal littermates were studied through 2 years of age by hanging latency, rotarod, inked footprint analysis, and histological methods. Disruption of Lix1 expression did not affect survival nor result in any neuromuscular phenotype. Reverse transcriptase-PCR amplification of spinal cord RNA identified a Lix1 alternative transcript beginning in intron 4 and containing exons 5 and 6. The alternative transcript appeared to be rodent specific, and its expression was not disrupted in Lix1 KO mice. Expression of the alternative transcript may have compensated for the loss of Lix1 in the KO mice and thus protected against motor neuron degeneration.
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Affiliation(s)
- Erin N Wakeling
- Genetics Program, Michigan State University, East Lansing, MI 48824, USA
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48
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Deletion of insulin-regulated aminopeptidase in mice decreases susceptibility to pentylenetetrazol-induced generalized seizures. Seizure 2011; 20:602-5. [DOI: 10.1016/j.seizure.2011.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 04/08/2011] [Accepted: 04/22/2011] [Indexed: 11/18/2022] Open
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Zhuo JL, Li XC. New insights and perspectives on intrarenal renin-angiotensin system: focus on intracrine/intracellular angiotensin II. Peptides 2011; 32:1551-65. [PMID: 21699940 PMCID: PMC3137727 DOI: 10.1016/j.peptides.2011.05.012] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 05/05/2011] [Accepted: 05/09/2011] [Indexed: 02/06/2023]
Abstract
Although renin, the rate-limiting enzyme of the renin-angiotensin system (RAS), was first discovered by Robert Tigerstedt and Bergman more than a century ago, the research on the RAS still remains stronger than ever. The RAS, once considered to be an endocrine system, is now widely recognized as dual (circulating and local/tissue) or multiple hormonal systems (endocrine, paracrine and intracrine). In addition to the classical renin/angiotensin I-converting enzyme (ACE)/angiotensin II (Ang II)/Ang II receptor (AT₁/AT₂) axis, the prorenin/(Pro)renin receptor (PRR)/MAP kinase axis, the ACE2/Ang (1-7)/Mas receptor axis, and the Ang IV/AT₄/insulin-regulated aminopeptidase (IRAP) axis have recently been discovered. Furthermore, the roles of the evolving RAS have been extended far beyond blood pressure control, aldosterone synthesis, and body fluid and electrolyte homeostasis. Indeed, novel actions and underlying signaling mechanisms for each member of the RAS in physiology and diseases are continuously uncovered. However, many challenges still remain in the RAS research field despite of more than one century's research effort. It is expected that the research on the expanded RAS will continue to play a prominent role in cardiovascular, renal and hypertension research. The purpose of this article is to review the progress recently being made in the RAS research, with special emphasis on the local RAS in the kidney and the newly discovered prorenin/PRR/MAP kinase axis, the ACE2/Ang (1-7)/Mas receptor axis, the Ang IV/AT₄/IRAP axis, and intracrine/intracellular Ang II. The improved knowledge of the expanded RAS will help us better understand how the classical renin/ACE/Ang II/AT₁ receptor axis, extracellular and/or intracellular origin, interacts with other novel RAS axes to regulate blood pressure and cardiovascular and kidney function in both physiological and diseased states.
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Affiliation(s)
- Jia L Zhuo
- Laboratory of Receptor and Signal Transduction, Department of Pharmacology and Toxicology, the University of Mississippi Medical Center, Jackson, MS 39216-4505, USA.
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50
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Abstract
Translocation of Glut4 to the plasma membrane of fat and skeletal muscle cells is mediated by specialized insulin-responsive vesicles (IRVs), whose protein composition consists primarily of glucose transporter isoform 4 (Glut4), insulin-responsive amino peptidase (IRAP), sortilin, lipoprotein receptor-related protein 1 (LRP1) and v-SNAREs. How can these proteins find each other in the cell and form functional vesicles after endocytosis from the plasma membrane? We are proposing a model according to which the IRV component proteins are internalized into sorting endosomes and are delivered to the IRV donor compartment(s), recycling endosomes and/or the trans-Golgi network (TGN), by cellugyrin-positive transport vesicles. The cytoplasmic tails of Glut4, IRAP, LRP1 and sortilin play an important targeting role in this process. Once these proteins arrive in the donor compartment, they interact with each other via their lumenal domains. This facilitates clustering of the IRV proteins into an oligomeric complex, which can then be distributed from the donor membranes to the IRV as a single entity with the help of adaptors, such as Golgi-localized, gamma-adaptin ear-containing, ARF-binding (GGA).
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Affiliation(s)
- Konstantin V Kandror
- Department of Biochemistry, Boston University School of Medicine, 72 E. Concord Street, Boston, MA 02118, USA
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