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Sasaki S, Oba K, Kodera Y, Itakura M, Shichiri M. ANGT_HUMAN[448–462], an Anorexigenic Peptide Identified using Plasma Peptidomics. J Endocr Soc 2022; 6:bvac082. [PMID: 35702602 PMCID: PMC9184509 DOI: 10.1210/jendso/bvac082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Indexed: 11/19/2022] Open
Abstract
Abstract
The discovery of bioactive peptides is an important research target that enables the elucidation of the pathophysiology of human diseases and provides seeds for drug discovery. Using a large number of native peptides previously identified using plasma peptidomics technology, we sequentially synthesized selected sequences and subjected them to functional screening using human cultured cells. A 15-amino-acid residue proangiotensinogen-derived peptide, designated ANGT_HUMAN[448–462], elicited cellular responses and bound to cultured human cells. Synthetic fluorescent-labeled and biotinylated ANGT_HUMAN[448–462] peptides were rendered to bind to cell- and tissue-derived proteins and peptide-cell protein complexes were retrieved and analyzed using liquid chromatography-tandem mass spectrometry, revealing the β-subunit of ATP synthase as its cell-surface binding protein. Because ATP synthase mediates the effects of anorexigenic peptides, the ability of ANGT_HUMAN[448–462] to modulate eating behavior in mice was investigated. Both intraperitoneal and intracerebroventricular injections of low doses of ANGT_HUMAN[448–462] suppressed spontaneous food and water intake throughout the dark phase of the diurnal cycle without affecting locomotor activity. Immunoreactive ANGT_HUMAN[448–462], distributed throughout human tissues and in human-derived cells, is mostly co-localized with angiotensin II and is occasionally present separately from angiotensin II. In this study, an anorexigenic peptide, ANGT_HUMAN[448–462], was identified by exploring cell surface target proteins of the human native peptides identified using plasma peptidomics.
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Affiliation(s)
- Sayaka Sasaki
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine Kanagawa 252-0374, Japan
| | - Kazuhito Oba
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine Kanagawa 252-0374, Japan
| | - Yoshio Kodera
- Department of Physics, Kitasato University School of Science, Kanagawa 252-0373, Japan
- Center for Disease Proteomics, Kitasato University School of Science, Kanagawa 252-0373, Japan
| | - Makoto Itakura
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa 252-0374, Japan
| | - Masayoshi Shichiri
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine Kanagawa 252-0374, Japan
- Department of Diabetes, Endocrinology and Metabolism, Tokyo Kyosai Hospital, Tokyo 153-8934, Japan
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Brain angiotensin converting enzyme-2 in central cardiovascular regulation. Clin Sci (Lond) 2021; 134:2535-2547. [PMID: 33016313 DOI: 10.1042/cs20200483] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/18/2020] [Accepted: 09/22/2020] [Indexed: 12/24/2022]
Abstract
The brain renin-angiotensin system (RAS) plays an important role in the regulation of autonomic and neuroendocrine functions, and maintains cardiovascular homeostasis. Ang-II is the major effector molecule of RAS and exerts most of its physiological functions, including blood pressure (BP) regulation, via activation of AT1 receptors. Dysregulation of brain RAS in the central nervous system results in increased Ang-II synthesis that leads to sympathetic outflow and hypertension. Brain angiotensin (Ang) converting enzyme-2 (ACE2) was discovered two decades ago as an RAS component, exhibiting a counter-regulatory role and opposing the adverse cardiovascular effects produced by Ang-II. Studies using synthetic compounds that can sustain the elevation of ACE2 activity or genetically overexpressed ACE2 in specific brain regions found various beneficial effects on cardiovascular function. More recently, ACE2 has been shown to play critical roles in neuro-inflammation, gut dysbiosis and the regulation of stress and anxiety-like behaviors. In the present review, we aim to highlight the anatomical locations and functional implication of brain ACE2 related to its BP regulation via modulation of the sympathetic nervous system and discuss the recent developments and future directions in the ACE2-mediated central cardiovascular regulation.
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Taguchi T, Kodera Y, Oba K, Saito T, Nakagawa Y, Kawashima Y, Shichiri M. Suprabasin-derived bioactive peptides identified by plasma peptidomics. Sci Rep 2021; 11:1047. [PMID: 33441610 PMCID: PMC7806982 DOI: 10.1038/s41598-020-79353-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 11/08/2020] [Indexed: 01/29/2023] Open
Abstract
Identification of low-abundance, low-molecular-weight native peptides using non-tryptic plasma has long remained an unmet challenge, leaving potential bioactive/biomarker peptides undiscovered. We have succeeded in efficiently removing high-abundance plasma proteins to enrich and comprehensively identify low-molecular-weight native peptides using mass spectrometry. Native peptide sequences were chemically synthesized and subsequent functional analyses resulted in the discovery of three novel bioactive polypeptides derived from an epidermal differentiation marker protein, suprabasin. SBSN_HUMAN[279-295] potently suppressed food/water intake and induced locomotor activity when injected intraperitoneally, while SBSN_HUMAN[225-237] and SBSN_HUMAN[243-259] stimulated the expression of proinflammatory cytokines via activation of NF-κB signaling in vascular cells. SBSN_HUMAN[225-237] and SBSN_HUMAN[279-295] immunoreactivities were present in almost all human organs analyzed, while immunoreactive SBSN_HUMAN[243-259] was abundant in the liver and pancreas. Human macrophages expressed the three suprabasin-derived peptides. This study illustrates a new approach for discovering unknown bioactive peptides in plasma via the generation of peptide libraries using a novel peptidomic strategy.
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Affiliation(s)
- Tomomi Taguchi
- grid.410786.c0000 0000 9206 2938Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374 Japan
| | - Yoshio Kodera
- grid.410786.c0000 0000 9206 2938Department of Physics, Kitasato University School of Science, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373 Japan ,grid.410786.c0000 0000 9206 2938Center for Disease Proteomics, Kitasato University School of Science, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373 Japan
| | - Kazuhito Oba
- grid.410786.c0000 0000 9206 2938Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374 Japan
| | - Tatsuya Saito
- grid.410786.c0000 0000 9206 2938Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374 Japan ,grid.410786.c0000 0000 9206 2938Department of Physics, Kitasato University School of Science, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373 Japan
| | - Yuzuru Nakagawa
- grid.410786.c0000 0000 9206 2938Department of Physics, Kitasato University School of Science, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373 Japan
| | - Yusuke Kawashima
- grid.410786.c0000 0000 9206 2938Department of Physics, Kitasato University School of Science, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373 Japan
| | - Masayoshi Shichiri
- grid.410786.c0000 0000 9206 2938Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374 Japan
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Su CH, Tsai CY, Chang AY, Chan JY, Chan SH. MRI/DTI of the Brain Stem Reveals Reversible and Irreversible Disruption of the Baroreflex Neural Circuits: Clinical Implications. Theranostics 2016; 6:837-48. [PMID: 27162554 PMCID: PMC4860892 DOI: 10.7150/thno.14837] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 03/06/2016] [Indexed: 01/29/2023] Open
Abstract
Baroreflex is the physiological mechanism for the maintenance of blood pressure and heart rate. Impairment of baroreflex is not a disease per se. However, depending on severity, the eventuality of baroreflex dysfunction varies from inconvenience in daily existence to curtailment of mobility to death. Despite universal acceptance, neuronal traffic within the contemporary neural circuits during the execution of baroreflex has never been visualized. By enhancing signal detection and fine-tuning the scanning parameters, we have successfully implemented tractographic analysis of the medulla oblongata in mice that allowed for visualization of connectivity between key brain stem nuclei in the baroreflex circuits. When viewed in conjunction with radiotelemetric analysis of the baroreflex, we found that under pathophysiological conditions when the disrupted connectivity between key nuclei in the baroreflex circuits was reversible, the associated disease condition (e.g. neurogenic hypertension) was amenable to remedial measures. Nevertheless, fatality ensues under pathological conditions (e.g. hepatic encephalopathy) when the connectivity between key substrates in the baroreflex circuits was irreversibly severed. MRI/DTI also prompted partial re-wiring of the contemporary circuit for baroreflex-mediated sympathetic vasomotor tone, and unearthed an explanation for the time lapse between brain death and the inevitable asystole signifying cardiac death that follows.
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Affiliation(s)
- Chia-Hao Su
- 1. Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan, Republic of China
| | - Ching-Yi Tsai
- 1. Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan, Republic of China
| | - Alice Y.W. Chang
- 2. Institute of Physiology, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - Julie Y.H. Chan
- 1. Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan, Republic of China
| | - Samuel H.H. Chan
- 1. Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan, Republic of China
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Suzuki-Kemuriyama N, Nakano-Tateno T, Tani Y, Hirata Y, Shichiri M. Salusin-β as a powerful endogenous antidipsogenic neuropeptide. Sci Rep 2016; 6:20988. [PMID: 26869388 PMCID: PMC4751483 DOI: 10.1038/srep20988] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 01/14/2016] [Indexed: 01/22/2023] Open
Abstract
Salusin-β is an endogenous parasympathomimetic peptide, predominantly localized to the hypothalamus and posterior pituitary. Subcutaneously administered salusin-β (50 nmol/mouse) significantly increased water intake but did not affect locomotor activity or food intake. The salusin-β-induced increase in water intake was completely abrogated by pretreatment with muscarinic antagonist, atropine sulphate. In contrast, intracerebroventricular injection of salusin-β, at lower doses (10–100 fmol/mouse) caused a long-lasting decrease in water intake and locomotor activity throughout the entire dark phase of the diurnal cycle. Pre-injection of intracerebroventricular anti-salusin-β IgG completely abrogated the central salusin-β mediated suppression of water intake and locomotor activity. These results demonstrate contrasting actions of salusin-β in the control of water intake via the central and peripheral systems and highlight it as a potent endogenous antidipsogenic neuropeptide.
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Affiliation(s)
- Noriko Suzuki-Kemuriyama
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Kanagawa 252-0374, Japan.,Tokyo Medical and Dental University Graduate School, Tokyo 113-8519, Japan
| | - Tae Nakano-Tateno
- Tokyo Medical and Dental University Graduate School, Tokyo 113-8519, Japan
| | - Yuji Tani
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Kanagawa 252-0374, Japan
| | - Yukio Hirata
- Institute of Biomedical Research and Innovation Hospital, Hyogo, Japan
| | - Masayoshi Shichiri
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University School of Medicine, Kanagawa 252-0374, Japan
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Sakuyama H, Katoh M, Wakabayashi H, Zulli A, Kruzliak P, Uehara Y. Influence of gestational salt restriction in fetal growth and in development of diseases in adulthood. J Biomed Sci 2016; 23:12. [PMID: 26787358 PMCID: PMC4719732 DOI: 10.1186/s12929-016-0233-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 01/12/2016] [Indexed: 02/07/2023] Open
Abstract
Recent studies reported the critical role of the intrauterine environment of a fetus in growth or the development of disease in adulthood. In this article we discussed the implications of salt restriction in growth of a fetus and the development of growth-related disease in adulthood. Salt restriction causes retardation of fatal growth or intrauterine death thereby leading to low birth weight or decreased birth rate. Such retardation of growth along with the upregulation of the renin angiotensin system due to salt restriction results in the underdevelopment of cardiovascular organs or decreases the number of the nephron in the kidney and is responsible for onset of hypertension in adulthood. In addition, gestational salt restriction is associated with salt craving after weaning. Moreover, salt restriction is associated with a decrease in insulin sensitivity. A series of alterations in metabolism due to salt restriction are probably mediated by the upregulation of the renin angiotensin system and an epigenetic mechanism including proinflammatory substances or histone methylation. Part of the metabolic disease in adulthood may be programmed through such epigenetic changes. The modification of gene in a fetus may be switched on through environment factors or life style after birth. The benefits of salt restriction have been assumed thus far; however, more precise investigation is required of its influence on the health of fetuses and the onset of various diseases in adulthood.
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Affiliation(s)
- Hiroe Sakuyama
- Division of Clinical Nutrition, Faculty of Home Economics, Kyoritsu Women's University, 2-2-1 Hitotsubashi, Chiyoda, Tokyo, 101-8437, Japan
| | - Minami Katoh
- Division of Clinical Nutrition, Faculty of Home Economics, Kyoritsu Women's University, 2-2-1 Hitotsubashi, Chiyoda, Tokyo, 101-8437, Japan
| | - Honoka Wakabayashi
- Division of Clinical Nutrition, Faculty of Home Economics, Kyoritsu Women's University, 2-2-1 Hitotsubashi, Chiyoda, Tokyo, 101-8437, Japan
| | - Anthony Zulli
- The Centre for Chronic Disease Prevention & Management (CCDPM), Western CHRE, Victoria University, St Albans, Australia
| | - Peter Kruzliak
- 2nd Department of Internal Medicine, Faculty of Medicine, Masaryk University, Pekarska 53, 656 91, Brno, Czech Republic.
- Laboratory of Structural Biology and Proteomics, Central Laboratories, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic.
| | - Yoshio Uehara
- Division of Clinical Nutrition, Faculty of Home Economics, Kyoritsu Women's University, 2-2-1 Hitotsubashi, Chiyoda, Tokyo, 101-8437, Japan.
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Hara A, Chow R, Du DD, Sakuyama H, Uehara Y. Low Salt Diet in Pregnant Mothers Is Associated with Enhanced Salt Appetite in Their Offspring of Dahl Salt-Sensitive Rats. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/fns.2014.519202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Angiotensinogen gene polymorphisms and food-intake behavior in young, normal female subjects in Japan. Nutrition 2012; 29:60-5. [PMID: 22858200 DOI: 10.1016/j.nut.2012.03.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 03/17/2012] [Accepted: 03/19/2012] [Indexed: 02/07/2023]
Abstract
OBJECTIVE We examined whether angiotensinogen (AGT) gene polymorphisms are associated with food preferences in young, normal female subjects. METHODS Fifty-two young, normal female subjects (21-22 y old) were recruited. After a 12-h fast, blood samples were obtained to examine the AGT gene polymorphisms (rs699 and rs7079), angiotensin-converting enzyme (ACE) insertion (I)/deletion (D), and adrenergic β3 receptor (ADRB3) gene polymorphisms (rs4994). A trained dietitian interviewed the participants to determine the portion size and frequency of food eaten for 1 wk by using the established questionnaire FFQg 3.0. RESULTS The genotypes of the AGT Met235Thr polymorphisms were TT:TC:CC = 2:19:31 (T:C = 0.22:0.78). The genotypes of AGT rs7079 were CC:CA:AA = 26:21:5 (C:A = 0.70:0.30), and those of ACE were DD:DI:II = 5:28:19 (D/I = 0.37:0.63). The genotypes of ADRB3 Trp64Arg were TT:TC:CC = 38:11:3 (T:C = 0.84:0.16). The total caloric intake was greater for those with the MM/MT genotype of AGT Met235Thr than for those with the TT genotype (1993 versus 1698 kcal/d, P < 0.05). The consumption of total lipids, cholesterol, and unsaturated free fatty acids was also higher in those with the MM/MT genotype of AGT Met235Thr than in those with the TT genotype. However, the AGT polymorphism (rs7079) and the ACE I/D were not associated with food preferences. In contrast, the subjects with ADRB3 Trp64 tended to show a high energy intake and preferences for proteins and lipids including fatty acids and cholesterol. They ate more fish and meat. Multiple regression analysis showed that the energy intake in subjects with the MM/MT genotype was independently determined by total lipids (B = 11.7, P < 0.0001) and carbohydrates (B = 4.6, P < 0.0001). CONCLUSIONS The AGT Met235Thr polymorphism was significantly associated with a higher caloric intake owing to total fat and carbohydrate consumption.
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Lancien F, Wong M, Arab AA, Mimassi N, Takei Y, Le Mével JC. Central ventilatory and cardiovascular actions of angiotensin peptides in trout. Am J Physiol Regul Integr Comp Physiol 2012; 303:R311-20. [PMID: 22696574 DOI: 10.1152/ajpregu.00145.2012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In the brains of teleosts, angiotensin II (ANG II), one of the main effector peptides of the renin-angiotensin system, is implicated in various physiological functions notably body fluid and electrolyte homeostasis and cardiovascular regulation, but nothing is known regarding the potential action of ANG II and other angiotensin derivatives on ventilation. Consequently, the goal of the present study was to determine possible ventilatory and cardiovascular effects of intracerebroventricular injection of picomole doses (5-100 pmol) of trout [Asn(1)]-ANG II, [Asp(1)]-ANG II, ANG III, ANG IV, and ANG 1-7 into the third ventricle of unanesthetized trout. The central actions of these peptides were also compared with their ventilatory and cardiovascular actions when injected peripherally. Finally, we examined the presence of [Asn(1)]-ANG II, [Asp(1)]-ANG II, ANG III, and ANG IV in the brain and plasma using radioimmunoassay coupled with high-performance liquid chromatography. After intracerebroventricular injection, [Asn(1)]-ANG II and [Asp(1)]-ANG II two ANG IIs, elevated the total ventilation through a selective stimulatory action on the ventilation amplitude. However, the hyperventilatory effect of [Asn(1)]-ANG II was threefold higher than the effect of [Asp(1)]-ANG II at the 50-pmol dose. ANG III, ANG IV, and ANG 1-7 were without effect. In addition, ANG IIs and ANG III increased dorsal aortic blood pressure (P(DA)) and heart rate (HR). After intra-arterial injections, none of the ANG II peptides affected the ventilation but [Asn(1)]-ANG II, [Asp(1)]-ANG II, and ANG III elevated P(DA) (50 pmol: +80%, +58% and +48%, respectively) without significant decrease in HR. In brain tissue, comparable amounts of [Asn(1)]-ANG II and [Asp(1)]-ANG II were detected (ca. 40 fmol/mg brain tissue), but ANG III was not detected, and the amount of ANG IV was about eightfold lower than the content of the ANG IIs. In plasma, ANG IIs were also the major angiotensins (ca. 110 fmol/ml plasma), while significant but lower amounts of ANG III and ANG IV were present in plasma. In conclusion, our study suggests that the two ANG II isoforms produced within the brain may act as a neurotransmitter and/or neuromodulator to regulate the cardioventilatory functions in trout. In the periphery, two ANG IIs and their COOH-terminal peptides may act as a circulating hormone preferentially involved in cardiovascular regulations.
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Affiliation(s)
- Frédéric Lancien
- Laboratoire de Neurophysiologie, SFR ScInBioS, Faculté de Médecine et des Sciences de la Santé, Université Européenne de Bretagne, Université de Brest, INSERM UMR, CHU de Brest, France
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