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Burneikaitė G, Shkolnik E, Puronaitė R, Zuozienė G, Petrauskienė B, Misonis N, Kazėnaitė E, Laucevičius A, Smih F, Rouet P, Čelutkienė J. The association of catestatin and endocan with the effects of cardiac shock wave therapy: Biomarker sub-study of the randomized, sham procedure-controlled trial. Front Cardiovasc Med 2023; 10:1004574. [PMID: 36910537 PMCID: PMC9996196 DOI: 10.3389/fcvm.2023.1004574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 02/03/2023] [Indexed: 02/25/2023] Open
Abstract
Introduction Cardiac shock-wave therapy (CSWT) is a non-invasive regenerative treatment method based on low-frequency ultrasound waves, which stimulate angiogenesis. Current data about the effects of revascularization procedures on angiogenesis biomarkers is limited. Recently, an association of catestatin and endocan with coronary collateral development was shown in several trials. In this study, we aimed to evaluate the impact of CSWT on the dynamics of catestatin and endocan levels and to assess their correlation with parameters of myocardial perfusion and function. Methods Prospective, randomized, triple-blind, sham procedure-controlled study enrolled 72 adult subjects who complied with defined inclusion criteria (NCT02339454). We measured biomarkers in 48 patients with stable angina (24 patients of CSWT group, 24 patients of sham-procedure group). Additionally, patients were divided into responders and non-responders according to improvement in myocardial perfusion and/or contractility assessed by myocardial scintigraphy and dobutamine echocardiography (30 and 13 patients, respectively). The blood samples were collected at baseline, after the last treatment procedure (9th treatment week) and at 6-month follow-up to evaluate biomarkers concentration and stored at -80° until analysis. Serum catestatin and endocan levels were determined by commercially available ELISA kits. Results Serum catestatin concentration significantly increased in all patients. While endocan levels significantly decreased in the responders sub-group. The increase in catestatin levels at 9th week and 6 months was positively associated with improvement in summed difference score (rho = 0.356, p = 0.028) and wall motion score, WMS (rho = 0.397, p = 0.009) at 6 months in the whole study population. Meanwhile, the decrease in endocan levels over 6 months was positively correlated with improvement in WMS at 3- and 6- months (r = 0.378, p = 0.015 and r = 0.311, p = 0.045, respectively). ROC analysis revealed that a change at 6 months in catestatin and endocan levels significantly predicted improvement in myocardial perfusion and contractile function with 68.9% sensitivity and 75.0% specificity (p = 0.039) and 51.7% sensitivity, and 91.7% specificity (p = 0.017), respectively. Baseline endocan concentration and its change at 6 months predicted response to CSWT with 68.8% sensitivity and 83.3% specificity (p = 0.039) and 81.3% sensitivity and 100% specificity (p < 0.0001), respectively. Conclusion This study demonstrates the association of increase in catestatin and decrease in endocan levels with the improvement of myocardial perfusion and contractile function. The potential predictive value of catestatin and endocan dynamics for the response to regenerative therapy is shown.
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Affiliation(s)
- Greta Burneikaitė
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
- LA Maison de la Mitochondrie (LAMMI), Obesity and Heart Failure: Molecular and Clinical Investigations, INSERM Occitanie, Toulouse, France
- *Correspondence: Greta Burneikaitė ✉
| | - Evgeny Shkolnik
- Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT, United States
| | - Roma Puronaitė
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
- Faculty of Mathematics and Informatics, Institute of Data Science and Digital Technologies, Vilnius University, Vilnius, Lithuania
| | - Gitana Zuozienė
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
| | - Birutė Petrauskienė
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
| | - Nerijus Misonis
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
| | - Edita Kazėnaitė
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
- Faculty of Medicine, Institute of Biomedical Sciences, Vilnius University, Vilnius, Lithuania
| | - Aleksandras Laucevičius
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
| | - Fatima Smih
- INI-CRCT-FCRIN, GREAT Networks, Toulouse, France
- Spartacus-Biomed, Auterive, France
| | - Philippe Rouet
- LA Maison de la Mitochondrie (LAMMI), Obesity and Heart Failure: Molecular and Clinical Investigations, INSERM Occitanie, Toulouse, France
- INI-CRCT-FCRIN, GREAT Networks, Toulouse, France
| | - Jelena Čelutkienė
- Faculty of Medicine, Institute of Clinical Medicine, Vilnius University, Vilnius, Lithuania
- Vilnius University Hospital Santaros Klinikos, Vilnius, Lithuania
- Centre of Innovative Medicine, Vilnius, Lithuania
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Alieva AM, Teplova NV, Reznik EV, Ettinger OA, Faradzhov RA, Khachirova EA, Kovtiukh IV, Kotikova IA, Sysoeva DA, Bigushev IR, Nikitin IG. Catestanin – a promising biological marker for heart failure: A review. CONSILIUM MEDICUM 2022. [DOI: 10.26442/20751753.2022.10.201873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The epidemic of heart failure (HF) is one of the problems that the global health system has been facing for decades. HF is a multicomponent clinical syndrome caused by dysfunction of the heart and its pathological remodeling. In addition to the well-known natriuretic peptides, a number of cardiovascular biological markers have now been identified that provide clinicians with additional opportunities in diagnosing, classifying, predicting, and monitoring the effectiveness of treating patients with HF. From the position of establishing the sympathetic load in patients with HF, it seems very promising to assess the concentrations of catestatin. The presented data of our literature review suggest that catestatin is probably a reliable biological marker of the activity of the sympathetic division of the autonomic nervous system, and its elevated concentrations in patients with HF reflect the severity of the pathological process. However, despite the reliable results of studies, the clinical significance of assessing the values of this marker both separately and in the framework of a multimarker model requires further study in larger prospective clinical studies.
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Muntjewerff EM, Christoffersson G, Mahata SK, van den Bogaart G. Putative regulation of macrophage-mediated inflammation by catestatin. Trends Immunol 2022; 43:41-50. [PMID: 34844850 PMCID: PMC10843896 DOI: 10.1016/j.it.2021.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 01/31/2023]
Abstract
Catestatin (CST) is a bioactive cleavage product of the neuroendocrine prohormone chromogranin A (CgA). Recent findings show that CST can exert anti-inflammatory and antiadrenergic effects by suppressing the inflammatory actions of mammalian macrophages. However, recent findings also suggest that macrophages themselves are major CST producers. Here, we hypothesize that macrophages produce CST in an inflammation-dependent manner and thereby might self-regulate inflammation in an autocrine fashion. CST is associated with pathological conditions hallmarked by chronic inflammation, including autoimmune, cardiovascular, and metabolic disorders. Since intraperitoneal injection of CST in mouse models of diabetes and inflammatory bowel disease has been reported to be beneficial for mitigating disease, we posit that CST should be further investigated as a candidate target for treating certain inflammatory diseases.
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Affiliation(s)
- Elke M Muntjewerff
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Molecular Immunology and Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Gustaf Christoffersson
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden; Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Sushil K Mahata
- VA San Diego Healthcare System, La Jolla, CA, USA; Department of Medicine, University of California San Diego, La Jolla, CA, USA.
| | - Geert van den Bogaart
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Molecular Immunology and Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands.
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Catestatin as a Biomarker of Cardiovascular Diseases: A Clinical Perspective. Biomedicines 2021; 9:biomedicines9121757. [PMID: 34944578 PMCID: PMC8698910 DOI: 10.3390/biomedicines9121757] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 02/07/2023] Open
Abstract
Accounting for almost one-third of the global mortality, cardiovascular diseases (CVDs) represent a major global health issue. Emerging data suggest that most of the well-established mechanistic explanations regarding the cardiovascular pathophysiology are flawed, and cannot fully explain the progression and long-term effects of these diseases. On the other hand, dysregulation of the sympathetic nervous system (SNS) has emerged as an important player in the pathophysiology of CVDs. Even though upregulated SNS activity is an essential compensatory response to various stress conditions, in the long term, it becomes a major contributor to both cardiac dysfunction and vascular damage. Despite the fact that the importance of SNS hyperactivity in the setting of CVDs has been well-appreciated, its exact quantification and clinical application in either diagnostics or therapy of CVDs is still out of reach. Nevertheless, in recent years a number of novel laboratory biomarkers implicated in the pathophysiology of SNS activation have been explored. Specifically, in this review, we aimed to discuss the role of catestatin, a potent physiological inhibitor of catecholamine spillover that offers cardioprotective effects. Limited data indicate that catestatin could also be a reliable indirect marker of SNS activity and it is likely that high CST levels reflect advanced CV disease burden. Consequently, large-scale studies are required to validate these observations in the upcoming future.
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May Salivary Chromogranin A Act as a Physiological Index of Stress in Transported Donkeys? A Pilot Study. Animals (Basel) 2020; 10:ani10060972. [PMID: 32503233 PMCID: PMC7341495 DOI: 10.3390/ani10060972] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 05/27/2020] [Accepted: 06/02/2020] [Indexed: 11/17/2022] Open
Abstract
Road transport is known to be a stressful animal husbandry procedure as it induces the activation of two main physiological stress-related pathways: the hypothalamic-pituitary-adrenal cortex axis and the sympathetic-adrenal medulla axis. This preliminary study aimed to investigate whether salivary chromogranin A (CgA) concentration, known as a biomarker of the sympathetic activity system during psychological stress, may represent a novel physiological index of transportation-induced stress in donkeys. Nineteen Romagnolo donkeys, raised in groups on paddocks, were subject to two transportations, following the farm's routine procedures, for a mean duration of 64 min each on two consecutive days. Salivary samples were gently collected 15 min before and 15 min after each transportation. Salivary CgA was measured by a commercially available enzyme-linked immunosorbent assay test. Results showed that CgA salivary levels significantly decreased after both transportations. The physiological mechanisms underlying this result may be related to catestatin activity, a bioactive product of the proteolytic cleavage of CgA, that acts as an inhibitor of catecholamine release. This hypothesis requires further investigation, particularly considering the limited number of subjects involved in this preliminary study. The identification of a reliable and non-invasive stress-marker would represent a useful tool for improving farm animals' welfare in transport conditions.
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Chu SY, Peng F, Wang J, Liu L, Meng L, Zhao J, Han XN, Ding WH. Catestatin in defense of oxidative-stress-induced apoptosis: A novel mechanism by activating the beta2 adrenergic receptor and PKB/Akt pathway in ischemic-reperfused myocardium. Peptides 2020; 123:170200. [PMID: 31730792 DOI: 10.1016/j.peptides.2019.170200] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 11/09/2019] [Accepted: 11/11/2019] [Indexed: 02/07/2023]
Abstract
Apoptosis induced by oxidative stress is one of the most important cardiomyocytes losses during ischemia-reperfusion (I/R). Catestatin (CST) has been demonstrated to have the anti-oxidative capacity in vitro. We hypothesized that CST intervention could reduce apoptosis of cardiomyocytes induced by oxidative stress in I/R. In Langendorff-perfused rat heart global I/R model, CST was introduced at the reperfusion stage. In comparison to the control group, CST led to preservation on activities of superoxide dismutase and glutathione peroxidase, improvement of hemodynamics, and reduced infarction area in reperfused myocardium. The protection of CST was also shown by less apoptotic cardiomyocytes in TUNEL staining, less caspase-3 activation, and increased phosphorylation of protein kinase B (PKB/Akt) in Western blot. To further demonstrate the benefits of CST and explore the possible underlying mechanism, H2O2-challenged primary-cultured neonatal rat cardiomyocytes were used to simulate the oxidative-stressed scenario. CST incubation with the H2O2-challenged cardiomyocytes led to reduction of apoptosis, which was demonstrated by less Hoechst 33342 positive staining of nuclei, less caspase-3 activation, and DNA fragmentation. The effect of CST was abrogated by pretreatment of the cardiomyocytes with the PI3K inhibitor LY294002. Furthermore, Akt activation and the anti-apoptosis effect of CST were abolished by pretreatment of the cardiomyocytes with β2 receptor inhibitor ICI118551. Thus, the salvage of oxidative-stress-induced apoptotic cardiomyocytes in I/R by CST might involve activation β2 receptor and regulation of PI3K/Akt signaling in reperfusion injury salvage kinase (RISK) pathway.
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Affiliation(s)
- Song-Yun Chu
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Fen Peng
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China; Department of Cardiology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Jie Wang
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Lin Liu
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Lei Meng
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Jing Zhao
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Xiao-Ning Han
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Wen-Hui Ding
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China.
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Mahata SK, Corti A. Chromogranin A and its fragments in cardiovascular, immunometabolic, and cancer regulation. Ann N Y Acad Sci 2019; 1455:34-58. [PMID: 31588572 PMCID: PMC6899468 DOI: 10.1111/nyas.14249] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/09/2019] [Accepted: 09/13/2019] [Indexed: 12/11/2022]
Abstract
Chromogranin A (CgA)-the index member of the chromogranin/secretogranin secretory protein family-is ubiquitously distributed in endocrine, neuroendocrine, and immune cells. Elevated levels of CgA-related polypeptides, consisting of full-length molecules and fragments, are detected in the blood of patients suffering from neuroendocrine tumors, heart failure, renal failure, hypertension, rheumatoid arthritis, and inflammatory bowel disease. Full-length CgA and various CgA-derived peptides, including vasostatin-1, pancreastatin, catestatin, and serpinin, are expressed at different relative levels in normal and pathological conditions and exert diverse, and sometime opposite, biological functions. For example, CgA is overexpressed in genetic hypertension, whereas catestatin is diminished. In rodents, the administration of catestatin decreases hypertension, cardiac contractility, obesity, atherosclerosis, and inflammation, and it improves insulin sensitivity. By contrast, pancreastatin is elevated in diabetic patients, and the administration of this peptide to obese mice decreases insulin sensitivity and increases inflammation. CgA and the N-terminal fragment of vasostatin-1 can enhance the endothelial barrier function, exert antiangiogenic effects, and inhibit tumor growth in animal models, whereas CgA fragments lacking the CgA C-terminal region promote angiogenesis and tumor growth. Overall, the CgA system, consisting of full-length CgA and its fragments, is emerging as an important and complex player in cardiovascular, immunometabolic, and cancer regulation.
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Affiliation(s)
- Sushil K Mahata
- VA San Diego Healthcare System, San Diego, California.,Metabolic Physiology & Ultrastructural Biology Laboratory, Department of Medicine, University of California, San Diego, La Jolla, California
| | - Angelo Corti
- IRCCS San Raffaele Scientific Institute, San Raffaele Vita-Salute University, Milan, Italy
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Catestatin in Acutely Decompensated Heart Failure Patients: Insights from the CATSTAT-HF Study. J Clin Med 2019; 8:jcm8081132. [PMID: 31366074 PMCID: PMC6722699 DOI: 10.3390/jcm8081132] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/25/2019] [Accepted: 07/29/2019] [Indexed: 12/16/2022] Open
Abstract
The role of catestatin (CST) in acutely decompensated heart failure (ADHF) and myocardial infarction (MI) is poorly elucidated. Due to the implicated role of CST in the regulation of neurohumoral activity, the goals of the study were to determine CST serum levels among ninety consecutively enrolled ADHF patients, with respect to the MI history and left ventricular ejection fraction (LVEF) and to examine its association with clinical, echocardiographic, and laboratory parameters. CST levels were higher among ADHF patients with MI history, compared to those without (8.94 ± 6.39 vs. 4.90 ± 2.74 ng/mL, p = 0.001). CST serum levels did not differ among patients with reduced, midrange, and preserved LVEF (7.74 ± 5.64 vs. 5.75 ± 4.19 vs. 5.35 ± 2.77 ng/mL, p = 0.143, respectively). In the multivariable linear regression analysis, CST independently correlated with the NYHA class (β = 0.491, p < 0.001), waist-to-hip ratio (WHR) (β = −0.237, p = 0.026), HbA1c (β = −0.235, p = 0.027), LDL (β = −0.231, p = 0.029), non-HDL cholesterol (β = −0.237, p = 0.026), hs-cTnI (β = −0.221, p = 0.030), and the admission and resting heart rate (β = −0.201, p = 0.036 and β = −0.242, p = 0.030), and was in positive association with most echocardiographic parameters. In conclusion, CST levels were increased in ADHF patients with MI and were overall associated with a favorable cardiometabolic profile but at the same time reflected advanced symptomatic burden (CATSTAT-HF ClinicalTrials.gov number, NCT03389386).
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Modulation of the coronary tone in the expanding scenario of Chromogranin-A and its derived peptides. Future Med Chem 2019; 11:1501-1511. [DOI: 10.4155/fmc-2018-0585] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The cardiac function critically depends on an adequate myocardial oxygenation and on a correct coronary blood flow. Endothelial, hormonal and extravascular factors work together generating a fine balance between oxygen supply and oxygen utilization through the coronary circulation. Among the regulatory factors that contribute to the coronary tone, increasing attention is paid to the cardiac endocrines, such as chromogranin A, a prohormone for many biologically active peptides, including vasostatin and catestatin. In this review, we will summarize the available evidences about the coronary effects of these molecules, and their putative mechanism of action. Laboratory and clinical data on chromogranin A and its derived fragments will be analyzed in relation to the scenario of the endocrine heart, and of its putative clinical perspectives.
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Sahu BS, Mahata S, Bandyopadhyay K, Mahata M, Avolio E, Pasqua T, Sahu C, Bandyopadhyay GK, Bartolomucci A, Webster NJG, Van Den Bogaart G, Fischer-Colbrie R, Corti A, Eiden LE, Mahata SK. Catestatin regulates vesicular quanta through modulation of cholinergic and peptidergic (PACAPergic) stimulation in PC12 cells. Cell Tissue Res 2018; 376:51-70. [PMID: 30467710 DOI: 10.1007/s00441-018-2956-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/30/2018] [Indexed: 12/23/2022]
Abstract
We have previously shown that the chromogranin A (CgA)-derived peptide catestatin (CST: hCgA352-372) inhibits nicotine-induced secretion of catecholamines from the adrenal medulla and chromaffin cells. In the present study, we seek to determine whether CST regulates dense core (DC) vesicle (DCV) quanta (catecholamine and chromogranin/secretogranin proteins) during acute (0.5-h treatment) or chronic (24-h treatment) cholinergic (nicotine) or peptidergic (PACAP, pituitary adenylyl cyclase activating polypeptide) stimulation of PC12 cells. In acute experiments, we found that both nicotine (60 μM) and PACAP (0.1 μM) decreased intracellular norepinephrine (NE) content and increased 3H-NE secretion, with both effects markedly inhibited by co-treatment with CST (2 μM). In chronic experiments, we found that nicotine and PACAP both reduced DCV and DC diameters and that this effect was likewise prevented by CST. Nicotine or CST alone increased expression of CgA protein and together elicited an additional increase in CgA protein, implying that nicotine and CST utilize separate signaling pathways to activate CgA expression. In contrast, PACAP increased expression of CgB and SgII proteins, with a further potentiation by CST. CST augmented the expression of tyrosine hydroxylase (TH) but did not increase intracellular NE levels, presumably due to its inability to cause post-translational activation of TH through serine phosphorylation. Co-treatment of CST with nicotine or PACAP increased quantal size, plausibly due to increased synthesis of CgA, CgB and SgII by CST. We conclude that CST regulates DCV quanta by acutely inhibiting catecholamine secretion and chronically increasing expression of CgA after nicotinic stimulation and CgB and SgII after PACAPergic stimulation.
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Affiliation(s)
- Bhavani Shankar Sahu
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA. .,Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0732, USA.
| | - Sumana Mahata
- California Institute of Technology, Pasadena, CA, USA
| | - Keya Bandyopadhyay
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0732, USA
| | - Manjula Mahata
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0732, USA
| | | | | | - Chinmayi Sahu
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA
| | - Gautam K Bandyopadhyay
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0732, USA
| | - Alessandro Bartolomucci
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA
| | - Nicholas J G Webster
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0732, USA.,VA San Diego Healthcare System, San Diego, CA, USA
| | | | | | - Angelo Corti
- IRCCS San Raffaele Scientific Institute, San Raffaele Vita-Salute University, Milan, Italy
| | - Lee E Eiden
- Section on Molecular Neuroscience, NIMH-IRP, Bethesda, MD, USA
| | - Sushil K Mahata
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0732, USA. .,VA San Diego Healthcare System, San Diego, CA, USA.
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Catestatin Induces Glucose Uptake and GLUT4 Trafficking in Adult Rat Cardiomyocytes. BIOMED RESEARCH INTERNATIONAL 2018; 2018:2086109. [PMID: 30370303 PMCID: PMC6189662 DOI: 10.1155/2018/2086109] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 09/10/2018] [Accepted: 09/13/2018] [Indexed: 12/26/2022]
Abstract
Catestatin is a cationic and hydrophobic peptide derived from the enzymatic cleavage of the prohormone Chromogranin A. Initially identified as a potent endogenous nicotinic-cholinergic antagonist, Catestatin has recently been shown to act as a novel regulator of cardiac function and blood pressure and as a cardioprotective agent in both pre- and postconditioning through AKT-dependent mechanisms. The aim of this study is to investigate the potential role of Catestatin also on cardiac metabolism modulation, particularly on cardiomyocytes glucose uptake. Experiments were performed on isolated adult rat cardiomyocytes. Glucose uptake was assessed by fluorescent glucose incubation and confocal microscope analysis. Glut4 plasma membrane translocation was studied by immunofluorescence experiments and evaluation of the ratio peripheral vs internal Glut4 staining. Furthermore, we performed immunoblot experiments to investigate the involvement of the intracellular pathway AKT/AS160 in the Catestatin dependent Glut4 trafficking. Our results show that 10 nM Catestatin induces a significant increase in the fluorescent glucose uptake, comparable to that exerted by 100 nM Insulin. Moreover, Catestatin stimulates Glut4 translocation to plasma membrane and both AKT and AS160 phosphorylation. All these effects were inhibited by Wortmannin. On the whole, we show for the first time that Catestatin is able to modulate cardiac glucose metabolism, by inducing an increase in glucose uptake through Glut4 translocation to the plasma membrane and that this mechanism is mediated by the AKT/AS160 intracellular pathway.
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Bandyopadhyay GK, Mahata SK. Chromogranin A Regulation of Obesity and Peripheral Insulin Sensitivity. Front Endocrinol (Lausanne) 2017; 8:20. [PMID: 28228748 PMCID: PMC5296320 DOI: 10.3389/fendo.2017.00020] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 01/23/2017] [Indexed: 01/15/2023] Open
Abstract
Chromogranin A (CgA) is a prohormone and granulogenic factor in endocrine and neuroendocrine tissues, as well as in neurons, and has a regulated secretory pathway. The intracellular functions of CgA include the initiation and regulation of dense-core granule biogenesis and sequestration of hormones in neuroendocrine cells. This protein is co-stored and co-released with secreted hormones. The extracellular functions of CgA include the generation of bioactive peptides, such as pancreastatin (PST), vasostatin, WE14, catestatin (CST), and serpinin. CgA knockout mice (Chga-KO) display: (i) hypertension with increased plasma catecholamines, (ii) obesity, (iii) improved hepatic insulin sensitivity, and (iv) muscle insulin resistance. These findings suggest that individual CgA-derived peptides may regulate different physiological functions. Indeed, additional studies have revealed that the pro-inflammatory PST influences insulin sensitivity and glucose tolerance, whereas CST alleviates adiposity and hypertension. This review will focus on the different metabolic roles of PST and CST peptides in insulin-sensitive and insulin-resistant models, and their potential use as therapeutic targets.
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Affiliation(s)
| | - Sushil K. Mahata
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Department of Medicine, Metabolic Physiology and Ultrastructural Biology Laboratory, VA San Diego Healthcare System, San Diego, CA, USA
- *Correspondence: Sushil K. Mahata,
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Peng F, Chu S, Ding W, Liu L, Zhao J, Cui X, Li R, Wang J. The predictive value of plasma catestatin for all-cause and cardiac deaths in chronic heart failure patients. Peptides 2016; 86:112-117. [PMID: 27771336 DOI: 10.1016/j.peptides.2016.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 10/10/2016] [Accepted: 10/18/2016] [Indexed: 12/20/2022]
Abstract
Catestatin (CST) is a proteolytic fragment of Chromogranin A with a broad spectrum of activities in the cardiovascular system. The level of plasma CST increases in chronic heart failure patients, but its potential relationship to patient prognosis is unknown. In this study, we measured plasma CST levels in 202 chronic heart failure patients and followed them for a median of 52.5 months. The plasma CST level was higher in patients with all-cause death and cardiac death than in survivors. According to univariate COX regression, higher plasma CST levels predicted increased risk of all-cause and cardiac death. After adjustment for other confounding factors, plasma CST was an independent risk factor for both outcomes, and the hazard ratios (HRs) were 1.84 (95% CI: 1.02-3.32, p=0.042) and 2.41 (95% CI: 1.26-4.62, p=0.008) for all-cause death and cardiac death, respectively. The new risk-predictive model considering CST was superior to the previous model for both outcomes by ANOVA and likelihood ratio tests (p=0.040 and p=0.008, respectively). Concurrent increases in plasma BNP (B-type natriuretic peptide) and CST levels predicted the highest risk for both all-cause and cardiac deaths [HR=5.18 (95% CI: 1.94-13.87, p=0.001) and HR=9.19 (95% CI: 2.75-30.78, p<0.001), respectively]. Large-scale studies are needed to further assess the value of plasma CST in predicting heart failure prognosis.
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Affiliation(s)
- Fen Peng
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
| | - Songyun Chu
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
| | - Wenhui Ding
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China.
| | - Lin Liu
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
| | - Jing Zhao
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
| | - Xiaojing Cui
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
| | - Renxu Li
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
| | - Jie Wang
- Department of Cardiology, Peking University First Hospital, No. 8, Xishiku Street, West District, Beijing, 100034, PR China
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Analysis and validation of traits associated with a single nucleotide polymorphism Gly364Ser in catestatin using humanized chromogranin A mouse models. J Hypertens 2016; 34:68-78. [PMID: 26556564 DOI: 10.1097/hjh.0000000000000760] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
OBJECTIVE The human prohormone chromogranin A (CHGA), an index member of the granin family is processed to generate catestatin, a peptide that is hypotensive in action and modulates catecholamine release within the sympathoadrenal system. Hypertensive patients with excess sympathetic activity have diminished catestatin. Often the study of physiological consequences of human genetic variation is confounded by elements such as other variations in obligatory linkage disequilibrium with the variant being studied. Also the phenotype of the variant may be influenced by genetic background that varies amongst individuals. This study addresses the effects of a human catestatin polymorphism (rs9658667) using humanized CHGA mouse models. METHODS We created pertinent humanized mouse models wherein the mouse Chga gene locus was replaced by the human ortholog wild-type and the variant versions. This allowed for probing of the effects of catestatin variation in vivo with controls for other variations and global genetic background. RESULTS Both the wild-type and variant human catestatin expressing mouse models were normotensive. The variant catestatin mouse model recapitulated physiological influence of the polymorphism on autonomic traits. These mice had diminished catecholamine, attenuated stress response and increased baroreceptor slopes that would suggest reduced risk of developing hypertension. Elevated plasma glucose, a trait observed in humans was not observed in mice expressing the variant catestatin. CONCLUSION This functional genomics approach of creating humanized mouse models to study rs9658667 polymorphism recapitulated and validated many of the human trait associations. This approach can also be applied in the study of other human gene polymorphisms.
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Wang D, Liu T, Shi S, Li R, Shan Y, Huang Y, Hu D, Huang C. Chronic Administration of Catestatin Improves Autonomic Function and Exerts Cardioprotective Effects in Myocardial Infarction Rats. J Cardiovasc Pharmacol Ther 2016; 21:526-535. [PMID: 26821570 DOI: 10.1177/1074248416628676] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/28/2015] [Indexed: 12/20/2022]
Abstract
Catestatin (CST), which is emerging as a novel cardiac modulator, can protect the heart against excessive sympathetic drive in hypertensive cardiomyopathy. The aim of this study is to investigate whether exogenous CST decreases excessive cardiac sympathetic drive and improves autonomic function and exerts cardioprotective effects in myocardial infarction (MI) rats. Rats were divided into a sham group, MI group, and MI plus CST (MI + CST) group. Four weeks later, the autonomic function of the animals was assessed by analyzing heart rate variability (HRV) and measuring plasma catecholamine. Cardiac function was evaluated via echocardiography. Electrophysiological characteristics were assessed in Langendorff-perfused hearts. Compared to the MI group, the chronic administration of CST significantly increased the standard deviation of normal–normal intervals ( P < .01) and low-frequency (LF) and high-frequency (HF) HRV and decreased the ratio of LF–HF HRV ( P < .01 for all). Additionally, the level of plasma catecholamine was reduced in the MI + CST group compared to the MI group ( P < .01). Treatment with CST significantly increased ejection fraction (EF) and fraction shorting (FS) and significantly decreased the left ventricular end-systolic diameter and left ventricular end-diastolic diameter at 28 days postmyocardial infraction ( P < .05 for all). After MI, the ventricular repolarization duration, such as QTc intervals and action potential duration (APD) at 90% repolarization, was prolonged, and this prolongation could be decreased by CST ( P < .05 for all). The CST also increased the threshold of ADP alternans ( P < .01). Moreover, ventricular arrhythmias were induced in 83% of the MI group but only 33% of the MI + CST group ( P < .05). These results suggested that the chronic administration of CST plays a role in cardioprotection in MI rats, which may function by decreasing the cardiac sympathetic drive and improving autonomic function.
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Affiliation(s)
- Dandan Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
| | - Tao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
| | - Shaobo Shi
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
| | - Ran Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
| | - Yingguang Shan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
| | - Yan Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
| | - Dan Hu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
- Masonic Medical Research Laboratory, Utica, NY, USA
| | - Congxin Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiovacular Research Institute, Wuhan University, Wuhan, China
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Catestatin and GABA(A)R related feeding habits rely on dopamine, ghrelin plus leptin neuroreceptor expression variations. Physiol Behav 2016; 157:225-30. [PMID: 26875516 DOI: 10.1016/j.physbeh.2016.02.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 01/20/2016] [Accepted: 02/09/2016] [Indexed: 12/31/2022]
Abstract
Catestatin (CST), an endogenously small sympathoinhibitory peptide is capable of interfering with the major cerebral neuroreceptor-blocking site, i.e. γ-aminobutyric acidA receptor (GABAAR) system especially in limbic brain areas that are involved with feeding behaviors. The GABAARergic-related effects seem to derive from its interaction with other molecular neuroreceptors such as dopaminergic, ghrelin and leptinergic. In this context, the present study aimed to investigate probable feeding responses (eating and drinking) induced by treatment with CST and the GABAAR antagonist bicucullin (BIC) alone or simultaneously (CST+BIC) in the Syrian hibernating hamster (Mesocricetus auratus) model. Hamsters that received these compounds via intracerebroventricular infusions displayed notable variations of feeding and drinking bouts. In particular, an anorexigenic response was evident following treatment with CST while BIC evoked a significant increase of eating and drinking behaviors. Surprisingly when both agents were given simultaneously, a predominating anorexigenic response was detected as shown by evident CST-dependent reduction of feeding bouts. Contextually such behaviors, especially those following the combined treatment were tightly correlated with the significantly increased cerebral dopamine receptor 1 (D1) plus reduced ghrelin receptor (GhsR) and leptin receptor (LepR) transcript levels. Overall, the anorexigenic effect of CST deriving from its tight interaction with GABAARs activity plus D1 and GhsR transcripts tends to propose these neuronal elements as pivotal factors responsible for feeding disorders.
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18
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Impact of Chromogranin A deficiency on catecholamine storage, catecholamine granule morphology and chromaffin cell energy metabolism in vivo. Cell Tissue Res 2015; 363:693-712. [PMID: 26572539 DOI: 10.1007/s00441-015-2316-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 10/16/2015] [Indexed: 01/01/2023]
Abstract
Chromogranin A (CgA) is a prohormone and granulogenic factor in neuroendocrine tissues with a regulated secretory pathway. The impact of CgA depletion on secretory granule formation has been previously demonstrated in cell culture. However, studies linking the structural effects of CgA deficiency with secretory performance and cell metabolism in the adrenomedullary chromaffin cells in vivo have not previously been reported. Adrenomedullary content of the secreted adrenal catecholamines norepinephrine (NE) and epinephrine (EPI) was decreased 30-40 % in Chga-KO mice. Quantification of NE and EPI-storing dense core (DC) vesicles (DCV) revealed decreased DCV numbers in chromaffin cells in Chga-KO mice. For both cell types, the DCV diameter in Chga-KO mice was less (100-200 nm) than in WT mice (200-350 nm). The volume density of the vesicle and vesicle number was also lower in Chga-KO mice. Chga-KO mice showed an ~47 % increase in DCV/DC ratio, implying vesicle swelling due to increased osmotically active free catecholamines. Upon challenge with 2 U/kg insulin, there was a diminution in adrenomedullary EPI, no change in NE and a very large increase in the EPI and NE precursor dopamine (DA), consistent with increased catecholamine biosynthesis during prolonged secretion. We found dilated mitochondrial cristae, endoplasmic reticulum and Golgi complex, as well as increased synaptic mitochondria, synaptic vesicles and glycogen granules in Chga-KO mice compared to WT mice, suggesting that decreased granulogenesis and catecholamine storage in CgA-deficient mouse adrenal medulla is compensated by increased VMAT-dependent catecholamine update into storage vesicles, at the expense of enhanced energy expenditure by the chromaffin cell.
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Bassino E, Fornero S, Gallo MP, Gallina C, Femminò S, Levi R, Tota B, Alloatti G. Catestatin exerts direct protective effects on rat cardiomyocytes undergoing ischemia/reperfusion by stimulating PI3K-Akt-GSK3β pathway and preserving mitochondrial membrane potential. PLoS One 2015; 10:e0119790. [PMID: 25774921 PMCID: PMC4361546 DOI: 10.1371/journal.pone.0119790] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 01/30/2015] [Indexed: 12/17/2022] Open
Abstract
Catestatin (Cst) is a 21-amino acid peptide deriving from Chromogranin A. Cst exerts an overall protective effect against an excessive sympathetic stimulation of cardiovascular system, being able to antagonize catecholamine secretion and to reduce their positive inotropic effect, by stimulating the release of nitric oxide (NO) from endothelial cells. Moreover, Cst reduces ischemia/reperfusion (I/R) injury, improving post-ischemic cardiac function and cardiomyocyte survival. To define the cardioprotective signaling pathways activated by Cst (5 nM) we used isolated adult rat cardiomyocytes undergoing simulated I/R. We evaluated cell viability rate with propidium iodide labeling and mitochondrial membrane potential (MMP) with the fluorescent probe JC-1. The involvement of Akt, GSK3β, eNOS and phospholamban (PLN) cascade was studied by immunofluorescence. The role of PI3K-Akt/NO/cGMP pathway was also investigated by using the pharmacological blockers wortmannin (Wm), L-NMMA and ODQ. Our experiments revealed that Cst increased cell viability rate by 65% and reduced cell contracture in I/R cardiomyocytes. Wm, L-NMMA and ODQ limited the protective effect of Cst. The protective outcome of Cst was related to its ability to maintain MMP and to increase AktSer473, GSK3βSer9, PLNThr17 and eNOSSer1179 phosphorylation, while treatment with Wm abolished these effects. Thus, the present results show that Cst is able to exert a direct action on cardiomyocytes and give new insights into the molecular mechanisms involved in its protective effect, highlighting the PI3K/NO/cGMP pathway as the trigger and the MMP preservation as the end point of its action.
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Affiliation(s)
- Eleonora Bassino
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
| | - Sara Fornero
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
| | - Maria Pia Gallo
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
| | - Clara Gallina
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
| | - Saveria Femminò
- Department of Clinical and Biological Sciences, University of Torino, Regione Gonzole 10, 10043, Orbassano (TO), Italy
| | - Renzo Levi
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
| | - Bruno Tota
- Department of Cell Biology, University of Calabria, Arcavacata di Rende (CS), 87030, Cosenza, Italy
- National Institute for Cardiovascular Research, via Irnerio 48, 40126, Bologna, Italy
| | - Giuseppe Alloatti
- Department of Life Sciences and Systems Biology, University of Torino, via Accademia Albertina 13, 10123, Torino, Italy
- National Institute for Cardiovascular Research, via Irnerio 48, 40126, Bologna, Italy
- * E-mail:
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Bandyopadhyay GK, Lu M, Avolio E, Siddiqui JA, Gayen JR, Wollam J, Vu CU, Chi NW, O'Connor DT, Mahata SK. Pancreastatin-dependent inflammatory signaling mediates obesity-induced insulin resistance. Diabetes 2015; 64:104-16. [PMID: 25048197 DOI: 10.2337/db13-1747] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chromogranin A knockout (Chga-KO) mice exhibit enhanced insulin sensitivity despite obesity. Here, we probed the role of the chromogranin A-derived peptide pancreastatin (PST: CHGA(273-301)) by investigating the effect of diet-induced obesity (DIO) on insulin sensitivity of these mice. We found that on a high-fat diet (HFD), Chga-KO mice (KO-DIO) remain more insulin sensitive than wild-type DIO (WT-DIO) mice. Concomitant with this phenotype is enhanced Akt and AMPK signaling in muscle and white adipose tissue (WAT) as well as increased FoxO1 phosphorylation and expression of mature Srebp-1c in liver and downregulation of the hepatic gluconeogenic genes, Pepck and G6pase. KO-DIO mice also exhibited downregulation of cytokines and proinflammatory genes and upregulation of anti-inflammatory genes in WAT, and peritoneal macrophages from KO mice displayed similarly reduced proinflammatory gene expression. The insulin-sensitive, anti-inflammatory phenotype of KO-DIO mice is masked by supplementing PST. Conversely, a PST variant peptide PSTv1 (PST-NΔ3: CHGA(276-301)), lacking PST activity, simulated the KO phenotype by sensitizing WT-DIO mice to insulin. In summary, the reduced inflammation due to PST deficiency prevented the development of insulin resistance in KO-DIO mice. Thus, obesity manifests insulin resistance only in the presence of PST, and in its absence obesity is dissociated from insulin resistance.
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Affiliation(s)
- Gautam K Bandyopadhyay
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
| | - Minh Lu
- VA San Diego Healthcare System, San Diego, CA
| | - Ennio Avolio
- Department of Medicine, University of California, San Diego, San Diego, CA
| | | | | | - Joshua Wollam
- Department of Medicine, University of California, San Diego, San Diego, CA
| | - Christine U Vu
- Department of Medicine, University of California, San Diego, San Diego, CA
| | - Nai-Wen Chi
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
| | - Daniel T O'Connor
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
| | - Sushil K Mahata
- VA San Diego Healthcare System, San Diego, CA Department of Medicine, University of California, San Diego, San Diego, CA
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21
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Obligatory role for endothelial heparan sulphate proteoglycans and caveolae internalization in catestatin-dependent eNOS activation. BIOMED RESEARCH INTERNATIONAL 2014; 2014:783623. [PMID: 25136621 PMCID: PMC4127283 DOI: 10.1155/2014/783623] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/26/2014] [Accepted: 06/27/2014] [Indexed: 12/24/2022]
Abstract
The chromogranin-A peptide catestatin modulates a wide range of processes, such as cardiovascular functions, innate immunity, inflammation, and metabolism. We recently found that the cardiac antiadrenergic action of catestatin requires a PI3K-dependent NO release from endothelial cells, although the receptor involved is yet to be identified. In the present work, based on the cationic properties of catestatin, we tested the hypothesis of its interaction with membrane heparan sulphate proteoglycans, resulting in the activation of a caveolae-dependent endocytosis. Experiments were performed on bovine aortic endothelial cells. Endocytotic vesicles trafficking was quantified by confocal microscopy using a water-soluble membrane dye; catestatin colocalization with heparan sulphate proteoglycans and caveolin 1 internalization were studied by fluorimetric measurements in live cells. Modulation of the catestatin-dependent eNOS activation was assessed by immunofluorescence and immunoblot analysis. Our results demonstrate that catestatin (5 nM) colocalizes with heparan sulphate proteoglycans and induces a remarkable increase in the caveolae-dependent endocytosis and caveolin 1 internalization, which were significantly reduced by both heparinase and wortmannin. Moreover, catestatin was unable to induce Ser1179 eNOS phosphorylation after pretreatments with heparinase and methyl-β-cyclodextrin. Taken together, these results highlight the obligatory role for proteoglycans and caveolae internalization in the catestatin-dependent eNOS activation in endothelial cells.
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22
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Mele M, Avolio E, Alò R, Fazzari G, Mahata S, Canonaco M. Catestatin and orexin-A neuronal signals alter feeding habits in relation to hibernating states. Neuroscience 2014; 269:331-42. [DOI: 10.1016/j.neuroscience.2014.03.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 03/27/2014] [Accepted: 03/31/2014] [Indexed: 01/27/2023]
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Dev NB, Mir SA, Gayen JR, Siddiqui JA, Mustapic M, Vaingankar SM. Cardiac electrical activity in a genomically "humanized" chromogranin a monogenic mouse model with hyperadrenergic hypertension. J Cardiovasc Transl Res 2014; 7:483-493. [PMID: 24821335 DOI: 10.1007/s12265-014-9563-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/06/2014] [Indexed: 12/16/2022]
Abstract
The prohormone chromogranin A (CHGA) is ubiquitously found in vesicles of adrenal chromaffin cells and adrenergic neurons, and it is processed to the hypotensive hormone peptide catestatin (CST). Both CHGA and CST regulate blood pressure and cardiac function. This study addresses their role in cardiac electrical activity. We have generated two genomically "humanized" transgenic mouse strains (Tg31CHGA+/+; Chga-/- (HumCHGA31) and Tg19CHGA+/+; Chga-/- (HumCHGA19)) with varied CHGA expression and the ability to rescue the Chga-/- phenotype (hypertensive, hyperadrenergic with dilated cardiomyopathy). The normotensive HumCHGA31 mice express CHGA at levels comparable to wild-type. In contrast, the hypertensive HumCHGA19 mice have low levels of CHGA. EKG recordings revealed that the QT interval, R-amplitude, and QRS time-voltage integral are markedly longer in HumCHGA19 compared to wild-type and HumCHGA31 mice. These differences are accompanied by increased heart rate and QT variability, indicating that ventricular assault happens in a status of low levels of circulating CST.
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Affiliation(s)
- Nagendu B Dev
- Department of Medicine, University of California at San Diego, USA
| | - Saiful A Mir
- Department of Medicine, University of California at San Diego, USA
| | | | - Jawed A Siddiqui
- Department of Medicine, University of California at San Diego, USA
| | - Maja Mustapic
- Department of Medicine, University of California at San Diego, USA
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Pasqua T, Corti A, Gentile S, Pochini L, Bianco M, Metz-Boutigue MH, Cerra MC, Tota B, Angelone T. Full-length human chromogranin-A cardioactivity: myocardial, coronary, and stimulus-induced processing evidence in normotensive and hypertensive male rat hearts. Endocrinology 2013; 154:3353-65. [PMID: 23751870 DOI: 10.1210/en.2012-2210] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Plasma chromogranin-A (CgA) concentrations correlate with severe cardiovascular diseases, whereas CgA-derived vasostatin-I and catestatin elicit cardiosuppression via an antiadrenergic/nitric oxide-cGMP mediated mechanism. Whether these phenomena are related is unknown. We here investigated whether and to what extent full-length CgA directly influences heart performance and may be subjected to stimulus-elicited intracardiac processing. Using normotensive and hypertensive rats, we evaluated the following: 1) direct myocardial and coronary effects of full-length CgA; 2) the signal-transduction pathway involved in its action mechanism; and 3) CgA intracardiac processing after β-adrenergic [isoproterenol (Iso)]- and endothelin-1(ET-1)-dependent stimulation. The study was performed by using a Langendorff perfusion apparatus, Western blotting, affinity chromatography, and ELISA. We found that CgA (1-4 nM) dilated coronaries and induced negative inotropism and lusitropism, which disappeared at higher concentrations (10-16 nM). In spontaneously hypertensive rats (SHRs), negative inotropism and lusitropism were more potent than in young normotensive rats. We found that perfusion itself, Iso-, and endothelin-1 stimulation induced intracardiac CgA processing in low-molecular-weight fragments in young, Wistar Kyoto, and SHR rats. In young normotensive and adult hypertensive rats, CgA increased endothelial nitric oxide synthase phosphorylation and cGMP levels. Analysis of the perfusate from both Wistar rats and SHRs of untreated and treated (Iso) hearts revealed CgA absence. In conclusion, in normotensive and hypertensive rats, we evidenced the following: 1) full-length CgA directly affects myocardial and coronary function by AkT/nitric oxide synthase/nitric oxide/cGMP/protein kinase G pathway; and 2) the heart generates intracardiac CgA fragments in response to hemodynamic and excitatory challenges. For the first time at the cardiovascular level, our data provide a conceptual link between systemic and intracardiac actions of full-length CgA and its fragments, expanding the knowledge on the sympathochromaffin/CgA axis under normal and physiopathological conditions.
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Affiliation(s)
- Teresa Pasqua
- Department of Biology, Ecology, and Earth Sciences, University of Calabria, 87036 Arcavacata di Rende (CS), Italy
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Avolio E, Facciolo RM, Alò R, Mele M, Carelli A, Canonaco A, Mosciaro L, Talani G, Biggio G, Sanna E, Mahata SK, Canonaco M. Expression variations of chromogranin A and α1,2,4 GABA(A)Rs in discrete limbic and brainstem areas rescue cardiovascular alterations. Neurosci Res 2013; 77:8-15. [PMID: 23916832 DOI: 10.1016/j.neures.2013.07.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 07/08/2013] [Accepted: 07/24/2013] [Indexed: 12/21/2022]
Abstract
Recent interferences of hemodynamic functions via modified brain neuronal mechanisms have proven to be major causes of dementia and sleeping disorders. In this work, cerebral expression differences of the neuroactive vesicular chromogranin A (CgA) and distinct α GABA(A)R subunits were detected in the facultative hibernating hamster. In particular, damaged neuronal fields of hypotensive torpor (TORP) state were correlated to elevated CgA and GABA(A)R α1, α4 mRNA levels in the paraventricular hypothalamic nucleus (PVN), central amygdalar nucleus (CeA) plus solitary tractus nucleus (NTS). Conversely, few neurodegeneration signals of hypertensive arousal (AROU) state, accounted for mostly lower CgA levels in the same areas. This state also provided increased α2-containing sites in amygdala, hippocampal and NTS neurons together with elevated α4-containing receptors in the periventricular hypothalamic nucleus (Pe). Interestingly in our hibernating model, CgA appeared to preferentially feature inhibitory neurosignals as indicated by preliminary perfusion of amygdalar sites with its highly specific antihypertensive derived peptide (catestatin) promoting GABA-dependent sIPSCs. Overall, evident neuronal damages plus altered expression capacities of CgA and α1-, α2-, α4-GABA(A)Rs in CeA, Pe, PVN as well as NTS during both hibernating states corroborate for the first time key molecular switching events guaranteeing useful cardiovascular rescuing abilities of neurodegenerative disorders.
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Affiliation(s)
- Ennio Avolio
- Comparative Neuroanatomy Laboratory, University of Calabria, Ponte P. Bucci 4B, 87030 Arcavacata di Rende, Cosenza, Italy; Health Center srl, via Alimena 6, 87100 Cosenza, Italy; VA San Diego Healthcare System/Department of Medicine, University of California-San Diego, La Jolla, CA 92093-0838, USA
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Gaede AH, Inglott MA, Farnham MMJ, Pilowsky PM. Catestatin has an unexpected effect on the intrathecal actions of PACAP dramatically reducing blood pressure. Am J Physiol Regul Integr Comp Physiol 2012; 303:R719-26. [PMID: 22874427 DOI: 10.1152/ajpregu.00202.2012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This study focuses on presympathetic neurons of the rostral ventrolateral medulla (RVLM) that regulate sympathetic vasomotor tone. Many neurotransmitters are colocalized in RVLM neurons and are released under specific conditions to modulate efferent homeostatic responses. Of particular interest here are two peptides colocalized in catecholaminergic RVLM neurons: catestatin and pituitary adenylate cyclase-activating polypeptide (PACAP). Chromogranin A-derived catestatin is a potent endogenous noncompetitive nicotinic and adrenoreceptor antagonist. Catestatin impairs adenylate cyclase and phospholipase C action: mechanisms engaged by PACAP. Although PACAP and catestatin are likely coreleased, the possible effects of this are unknown. We aimed to determine whether catestatin affects the normal sympathoexcitatory but isotensive responses to intrathecal PACAP. Urethane-anesthetized, vagotomized, ventilated Sprague-Dawley rats (n = 22) were given an intrathecal injection of catestatin at different times prior to intrathecal administration of PACAP-38. Arterial pressure, splanchnic sympathetic nerve activity, heart rate, and reflex responses to baroreceptor and chemoreceptor activation were recorded. The key findings of this study are that pretreatment with catestatin time dependently enhances the PACAP-38 effect on mean arterial pressure and enhances sympathetic barosensitivity and chemosensitivity. The time-scale of the effect of catestatin on the response to PACAP-38 strongly suggests that catestatin is either causing changes in gene expression to exert its effects, or modifying intracellular mechanisms normally engaged by PAC(1) receptors. The ability of catestatin pretreatment to enhance barosensitivity and chemosensitivity after PACAP-38 injection supports the hypothesis that catestatin manipulates the intracellular environment within sympathetic neurons in a way that increases responses to PACAP.
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Affiliation(s)
- Andrea H Gaede
- The Australian School of Advanced Medicine, Macquarie Univ., Macquarie Park, NSW, Australia
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Davis JT, Rao F, Naqshbandi D, Fung MM, Zhang K, Schork AJ, Nievergelt CM, Ziegler MG, O'Connor DT. Autonomic and hemodynamic origins of pre-hypertension: central role of heredity. J Am Coll Cardiol 2012; 59:2206-16. [PMID: 22676942 DOI: 10.1016/j.jacc.2012.02.040] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2011] [Revised: 02/13/2012] [Accepted: 02/14/2012] [Indexed: 01/11/2023]
Abstract
OBJECTIVES The purpose of this study is to better understand the origins and progression of pre-hypertension. BACKGROUND Pre-hypertension is a risk factor for progression to hypertension, cardiovascular disease, and increased mortality. We used a cross-sectional twin study design to examine the role of heredity in likely pathophysiological events (autonomic or hemodynamic) in pre-hypertension. METHODS Eight hundred twelve individuals (337 normotensive, 340 pre-hypertensive, 135 hypertensive) were evaluated in a sample of twin pairs, their siblings, and other family members. They underwent noninvasive hemodynamic, autonomic, and biochemical testing, as well as estimates of trait heritability (the percentage of trait variance accounted for by heredity) and pleiotropy (the genetic covariance or shared genetic determination of traits) by variance components. RESULTS In the hemodynamic realm, an elevation of cardiac contractility prompted increased stroke volume, in turn increasing cardiac output, which elevated blood pressure into the pre-hypertension range. Autonomic monitoring detected an elevation of norepinephrine secretion plus a decline in cardiac parasympathetic tone. Twin pair variance components documented substantial heritability as well as joint genetic determination for blood pressure and the contributory autonomic and hemodynamic traits. Genetic variation at a pathway locus also indicated pleiotropic effects on contractility and blood pressure. CONCLUSIONS Elevated blood pressure in pre-hypertension results from increased cardiac output, driven by contractility as well as heart rate, which may reflect both diminished parasympathetic and increased sympathetic tone. In the face of increased cardiac output, systemic vascular resistance fails to decline homeostatically. Such traits display substantial heritability and shared genetic determination, although by loci not yet elucidated. These findings clarify the role of heredity in the origin of pre-hypertension and its autonomic and hemodynamic pathogenesis. The results also establish pathways that suggest new therapeutic targets for pre-hypertension, or approaches to its prevention.
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Affiliation(s)
- Jason T Davis
- Department of Medicine, University of California-San Diego, and V.A. San Diego Healthcare System, 9500 Gilman Drive, La Jolla, CA 92093, USA
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Currie G, Freel EM, Perry CG, Dominiczak AF. Disorders of blood pressure regulation-role of catecholamine biosynthesis, release, and metabolism. Curr Hypertens Rep 2012; 14:38-45. [PMID: 22068338 DOI: 10.1007/s11906-011-0239-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Catecholamines (epinephrine and norepinephrine) are synthesised and produced by the adrenal medulla and postganglionic nerve fibres of the sympathetic nervous system. It is known that essential hypertension has a significant neurogenic component, with the rise in blood pressure mediated at least in part by overactivity of the sympathetic nervous system. Moreover, novel therapeutic strategies aimed at reducing sympathetic activity show promise in the treatment of hypertension. This article reviews recent advances within this rapidly changing field, particularly focusing on the role of genetic polymorphisms within key catecholamine biosynthetic enzymes, cofactors, and storage molecules. In addition, mechanisms linking the sympathetic nervous system and other adverse cardiovascular states (obesity, insulin resistance, dyslipidaemia) are discussed, along with speculation as to how recent scientific advances may lead to the emergence of novel antihypertensive treatments.
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Affiliation(s)
- Gemma Currie
- Department of Endocrinology, Western Infirmary, Glasgow G11 6NT, UK
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29
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Bandyopadhyay GK, Vu CU, Gentile S, Lee H, Biswas N, Chi NW, O'Connor DT, Mahata SK. Catestatin (chromogranin A(352-372)) and novel effects on mobilization of fat from adipose tissue through regulation of adrenergic and leptin signaling. J Biol Chem 2012; 287:23141-51. [PMID: 22535963 DOI: 10.1074/jbc.m111.335877] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Chromogranin A knock-out (Chga-KO) mice display increased adiposity despite high levels of circulating catecholamines and leptin. Consistent with diet-induced obese mice, desensitization of leptin receptors caused by hyperleptinemia is believed to contribute to the obese phenotype of these KO mice. In contrast, obesity in ob/ob mice is caused by leptin deficiency. To characterize the metabolic phenotype, Chga-KO mice were treated with the CHGA-derived peptide catestatin (CST) that is deficient in these mice. CST treatment reduced fat depot size and increased lipolysis and fatty acid oxidation. In liver, CST enhanced oxidation of fatty acids as well as their assimilation into lipids, effects that are attributable to the up-regulation of genes promoting fatty acid oxidation (Cpt1α, Pparα, Acox, and Ucp2) and incorporation into lipids (Gpat and CD36). CST did not affect basal or isoproterenol-stimulated cAMP production in adipocytes but inhibited phospholipase C activation by the α-adrenergic receptor (AR) agonist phenylephrine, suggesting inhibition of α-AR signaling by CST. Indeed, CST mimicked the lipolytic effect of the α-AR blocker phentolamine on adipocytes. Moreover, CST reversed the hyperleptinemia of Chga-KO mice and improved leptin signaling as determined by phosphorylation of AMPK and Stat3. CST also improved peripheral leptin sensitivity in diet-induced obese mice. In ob/ob mice, CST enhanced leptin-induced signaling in adipose tissue. In conclusion, our results implicate CST in a novel pathway that promotes lipolysis and fatty acid oxidation by blocking α-AR signaling as well as by enhancing leptin receptor signaling.
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Angelone T, Quintieri AM, Pasqua T, Gentile S, Tota B, Mahata SK, Cerra MC. Phosphodiesterase type-2 and NO-dependent S-nitrosylation mediate the cardioinhibition of the antihypertensive catestatin. Am J Physiol Heart Circ Physiol 2011; 302:H431-42. [PMID: 22058158 DOI: 10.1152/ajpheart.00491.2011] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The chromogranin A (CHGA)-derived peptide catestatin (CST: hCHGA(352-372)) is a noncompetitive catecholamine-release inhibitor that exerts vasodilator, antihypertensive, and cardiosuppressive actions. We have shown that CST directly influences the basal performance of the vertebrate heart where CST dose dependently induced a nitric oxide-cGMP-dependent cardiosuppression and counteracted the effects of adrenergic stimulation through a noncompetitive antagonism. Here, we sought to determine the specific intracardiac signaling activated by CST in the rat heart. Physiological analyses performed on isolated, Langendorff-perfused cardiac preparations revealed that CST-induced negative inotropism and lusitropism involve β(2)/β(3)-adrenergic receptors (β(2)/β(3)-AR), showing a higher affinity for β(2)-AR. Interaction with β(2)-AR activated phosphatidylinositol 3-kinase/endothelial nitric oxide synthase (eNOS), increased cGMP levels, and induced activation of phosphodiesterases type 2 (PDE2), which was found to be involved in the antiadrenergic action of CST as evidenced by the decreased cAMP levels. CST-dependent negative cardiomodulation was abolished by functional denudation of the endothelium with Triton. CST also increased the eNOS expression in cardiac tissue and human umbilical vein endothelial cells. cells, confirming the involvement of the vascular endothelium. In ventricular extracts, CST increased S-nitrosylation of both phospholamban and β-arrestin, suggesting an additional mechanism for intracellular calcium modulation and β-adrenergic responsiveness. We conclude that PDE2 and S-nitrosylation play crucial roles in the CST regulation of cardiac function. Our results are of importance in relation to the putative application of CST as a cardioprotective agent against stress, including excessive sympathochromaffin overactivation.
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Affiliation(s)
- Tommaso Angelone
- Department of Cell Biology, Laboratory of Cardiovascular Pathophysiology, University of Calabria, Arcavacata di Rende (CS), Italy.
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Wang X, Xu S, Liang Y, Zhu D, Mi L, Wang G, Gao W. Dramatic changes in catestatin are associated with hemodynamics in acute myocardial infarction. Biomarkers 2011; 16:372-7. [PMID: 21545240 DOI: 10.3109/1354750x.2011.578260] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Acute myocardial infarction (AMI) is characterized by complex neuroendocrine activation. To investigate catestatin profiles, serial catestatin levels were determined by enzyme-linked immunosorbent assay in the first week after AMI in 50 patients. Catestatin levels reduced at admission and negatively correlated with heart rates; it increased significantly on the third day but remained decreased at 1 week and positively with blood pressure. In a subgroup of 20 patients admitted within 4 h after onset, circulating catestatin correlated inversely with norepinephrine. Catestatin might be involved in the course of AMI and act as a tool in monitoring the progression of AMI.
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Affiliation(s)
- Xinyu Wang
- Department of Cardiology, Peking University Third Hospital, Beijing, China
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Bassino E, Fornero S, Gallo MP, Ramella R, Mahata SK, Tota B, Levi R, Alloatti G. A novel catestatin-induced antiadrenergic mechanism triggered by the endothelial PI3K-eNOS pathway in the myocardium. Cardiovasc Res 2011; 91:617-24. [PMID: 21543385 DOI: 10.1093/cvr/cvr129] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
AIMS Catestatin (CST) is a chromogranin A (CgA)-derived peptide (hCgA352-372) with three identified human variants (G364S/P370L/R374Q-CST) that show differential potencies towards the inhibition of catecholamine release. Although CST affects several cardiovascular parameters, the mechanisms underlying CST action in the heart have remained elusive. Therefore, we sought to determine the mechanism of action of CST and its variants on ventricular myocardium and endothelial cells. METHODS AND RESULTS Contractile force and Ca(2+) transients were measured, respectively, on rat papillary muscles and isolated cardiomyocytes (CC) under basal conditions and after β-adrenergic stimulation. Nitric oxide (NO) production and endothelial nitric oxide synthase (eNOS) phosphorylation (P(Ser1179)eNOS) were studied in bovine aortic endothelial (BAE-1) cells. Under basal conditions, wild-type CST (WT-CST, 10-50 nM) transiently enhanced myocardial contractility. CST variants (G364S and P370L) exerted a comparable positive inotropic effect. The H(1) histamine receptor antagonist mepyramine abolished the increase of contractile force induced by WT-CST. Moreover, WT-CST dose-dependently (5-50 nM) reduced the effect of β-adrenergic stimulation. This anti-adrenergic effect was not mediated by a direct action on CC, but involved a PI3K-dependent NO release from endocardial endothelial cells. Indeed, CST induced a wortmannin-sensitive, Ca(2+)-independent increase in NO production and eNOS phosphorylation on BAE-1 cells. While the anti-adrenergic and NO release effects of P370L-CST were comparable with those of WT-CST, the G364S variant was ineffective on the same parameters. CONCLUSION Our results suggest that the anti-adrenergic action of CST depends on the endothelial PI3K-Akt-eNOS pathway and that its structural alterations entail functional features that correlate with the different anti-hypertensive potential described in humans.
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Affiliation(s)
- Eleonora Bassino
- Department of Animal and Human Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
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Zhang K, Chen Y, Wen G, Mahata M, Rao F, Fung MM, Vaingankar S, Biswas N, Gayen JR, Friese RS, Mahata SK, Hamilton BA, O’Connor DT. Catecholamine storage vesicles: role of core protein genetic polymorphisms in hypertension. Curr Hypertens Rep 2011; 13:36-45. [PMID: 21104344 PMCID: PMC3016145 DOI: 10.1007/s11906-010-0170-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Hypertension is a complex trait with deranged autonomic control of the circulation. The sympathoadrenal system exerts minute-to-minute control over cardiac output and vascular tone. Catecholamine storage vesicles (or chromaffin granules) of the adrenal medulla contain remarkably high concentrations of chromogranins/secretogranins (or "granins"), catecholamines, neuropeptide Y, adenosine triphosphate (ATP), and Ca(2+). Within secretory granules, granins are co-stored with catecholamine neurotransmitters and co-released upon stimulation of the regulated secretory pathway. The principal granin family members, chromogranin A (CHGA), chromogranin B (CHGB), and secretogranin II (SCG2), may have evolved from shared ancestral exons by gene duplication. This article reviews human genetic variation at loci encoding the major granins and probes the effects of such polymorphisms on blood pressure, using twin pairs to probe heritability and individuals with the most extreme blood pressure values in the population to study hypertension.
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Affiliation(s)
- Kuixing Zhang
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Yuqing Chen
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Gen Wen
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Manjula Mahata
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Fangwen Rao
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Maple M. Fung
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
- VA San Diego Healthcare System, San Diego, CA USA
| | - Sucheta Vaingankar
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Nilima Biswas
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Jiaur R. Gayen
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Ryan S. Friese
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Sushil K. Mahata
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
- VA San Diego Healthcare System, San Diego, CA USA
| | - Bruce A. Hamilton
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
| | - Daniel T. O’Connor
- Department of Medicine and Institute for Genomic Medicine (IGM), University of California at San Diego School of Medicine, 9500 Gilman Drive, La Jolla, CA 92093-0838 USA
- Department of Pharmacology, University of California at San Diego, San Diego, CA USA
- VA San Diego Healthcare System, San Diego, CA USA
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Catestatin improves post-ischemic left ventricular function and decreases ischemia/reperfusion injury in heart. Cell Mol Neurobiol 2010; 30:1171-9. [PMID: 21104119 PMCID: PMC3008938 DOI: 10.1007/s10571-010-9598-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Accepted: 09/02/2010] [Indexed: 02/02/2023]
Abstract
The Chromogranin A (CgA)-derived anti-hypertensive peptide catestatin (CST) antagonizes catecholamine secretion, and is a negative myocardial inotrope acting via a nitric oxide-dependent mechanism. It is not known whether CST contributes to ischemia/reperfusion injury or is a component of a cardioprotective response to limit injury. Here, we tested whether CST by virtue of its negative inotropic activity improves post-ischemic cardiac function and cardiomyocyte survival. Three groups of isolated perfused hearts from adult Wistar rats underwent 30-min ischemia and 120-min reperfusion (I/R, Group 1), or were post-conditioned by brief ischemic episodes (PostC, 5-cycles of 10-s I/R at the beginning of 120-min reperfusion, Group 2), or with exogenous CST (75 nM for 20 min, CST-Post, Group-3) at the onset of reperfusion. Perfusion pressure and left ventricular pressure (LVP) were monitored. Infarct size was evaluated with nitroblue-tetrazolium staining. The CST (5 nM) effects were also tested in simulated ischemia/reperfusion experiments on cardiomyocytes isolated from young-adult rats, evaluating cell survival with propidium iodide labeling. Infarct size was 61 ± 6% of risk area in hearts subjected to I/R only. PostC reduced infarct size to 34 ± 5%. Infarct size in CST-Post was 36 ± 3% of risk area (P < 0.05 respect to I/R). CST-Post reduced post-ischemic rise of diastolic LVP, an index of contracture, and significantly improved post-ischemic recovery of developed LVP. In isolated cardiomyocytes, CST increased the cell viability rate by about 65% after simulated ischemia/reperfusion. These results suggest a novel cardioprotective role for CST, which appears mainly due to a direct reduction of post-ischemic myocardial damages and dysfunction, rather than to an involvement of adrenergic terminals and/or endothelium.
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