1
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Liu M, Li S, Yin M, Li Y, Chen J, Chen Y, Zhou Y, Li Q, Xu F, Dai C, Xia Y, Chen A, Lu D, Chen Z, Qian J, Ge J. Pinacidil ameliorates cardiac microvascular ischemia-reperfusion injury by inhibiting chaperone-mediated autophagy of calreticulin. Basic Res Cardiol 2024; 119:113-131. [PMID: 38168863 PMCID: PMC10837255 DOI: 10.1007/s00395-023-01028-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 12/04/2023] [Accepted: 12/05/2023] [Indexed: 01/05/2024]
Abstract
Calcium overload is the key trigger in cardiac microvascular ischemia-reperfusion (I/R) injury, and calreticulin (CRT) is a calcium buffering protein located in the endoplasmic reticulum (ER). Additionally, the role of pinacidil, an antihypertensive drug, in protecting cardiac microcirculation against I/R injury has not been investigated. Hence, this study aimed to explore the benefits of pinacidil on cardiac microvascular I/R injury with a focus on endothelial calcium homeostasis and CRT signaling. Cardiac vascular perfusion and no-reflow area were assessed using FITC-lectin perfusion assay and Thioflavin-S staining. Endothelial calcium homeostasis, CRT-IP3Rs-MCU signaling expression, and apoptosis were assessed by real-time calcium signal reporter GCaMP8, western blotting, and fluorescence staining. Drug affinity-responsive target stability (DARTS) assay was adopted to detect proteins that directly bind to pinacidil. The present study found pinacidil treatment improved capillary density and perfusion, reduced no-reflow and infraction areas, and improved cardiac function and hemodynamics after I/R injury. These benefits were attributed to the ability of pinacidil to alleviate calcium overload and mitochondria-dependent apoptosis in cardiac microvascular endothelial cells (CMECs). Moreover, the DARTS assay showed that pinacidil directly binds to HSP90, through which it inhibits chaperone-mediated autophagy (CMA) degradation of CRT. CRT overexpression inhibited IP3Rs and MCU expression, reduced mitochondrial calcium inflow and mitochondrial injury, and suppressed endothelial apoptosis. Importantly, endothelial-specific overexpression of CRT shared similar benefits with pinacidil on cardiovascular protection against I/R injury. In conclusion, our data indicate that pinacidil attenuated microvascular I/R injury potentially through improving CRT degradation and endothelial calcium overload.
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Affiliation(s)
- Muyin Liu
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Su Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Ming Yin
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Youran Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Jinxiang Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Yuqiong Chen
- Gusu School, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - You Zhou
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Qiyu Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Fei Xu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Chunfeng Dai
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yan Xia
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Ao Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Danbo Lu
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China
| | - Zhangwei Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China.
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China.
| | - Juying Qian
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China.
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China.
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Shanghai Institute of Cardiovascular Diseases, Shanghai, 200032, China.
- National Clinical Research Center for Interventional Medicine, Shanghai, 200032, China.
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2
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Michalak M. Calreticulin: Endoplasmic reticulum Ca 2+ gatekeeper. J Cell Mol Med 2023; 28:e17839. [PMID: 37424156 PMCID: PMC10902585 DOI: 10.1111/jcmm.17839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/21/2023] [Accepted: 06/27/2023] [Indexed: 07/11/2023] Open
Abstract
Endoplasmic reticulum (ER) luminal Ca2+ is vital for the function of the ER and regulates many cellular processes. Calreticulin is a highly conserved, ER-resident Ca2+ binding protein and lectin-like chaperone. Over four decades of studying calreticulin demonstrate that this protein plays a crucial role in maintaining Ca2+ supply under different physiological conditions, in managing access to Ca2+ and how Ca2+ is used depending on the environmental events and in making sure that Ca2+ is not misused. Calreticulin plays a role of ER luminal Ca2+ sensor to manage Ca2+ -dependent ER luminal events including maintaining interaction with its partners, Ca2+ handling molecules, substrates and stress sensors. The protein is strategically positioned in the lumen of the ER from where the protein manages access to and distribution of Ca2+ for many cellular Ca2+ -signalling events. The importance of calreticulin Ca2+ pool extends beyond the ER and includes influence of cellular processes involved in many aspects of cellular pathophysiology. Abnormal handling of the ER Ca2+ contributes to many pathologies from heart failure to neurodegeneration and metabolic diseases.
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Affiliation(s)
- Marek Michalak
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
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3
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Souza-Neto FV, Islas F, Jiménez-González S, Luaces M, Ramchandani B, Romero-Miranda A, Delgado-Valero B, Roldan-Molina E, Saiz-Pardo M, Cerón-Nieto MÁ, Ortega-Medina L, Martínez-Martínez E, Cachofeiro V. Mitochondrial Oxidative Stress Promotes Cardiac Remodeling in Myocardial Infarction through the Activation of Endoplasmic Reticulum Stress. Antioxidants (Basel) 2022; 11:antiox11071232. [PMID: 35883722 PMCID: PMC9311874 DOI: 10.3390/antiox11071232] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/15/2022] [Accepted: 06/20/2022] [Indexed: 12/10/2022] Open
Abstract
We have evaluated cardiac function and fibrosis in infarcted male Wistar rats treated with MitoQ (50 mg/kg/day) or vehicle for 4 weeks. A cohort of patients admitted with a first episode of acute MI were also analyzed with cardiac magnetic resonance and T1 mapping during admission and at a 12-month follow-up. Infarcted animals presented cardiac hypertrophy and a reduction in the left ventricular ejection fraction (LVEF) and E- and A-waves (E/A) ratio when compared to controls. Myocardial infarction (MI) rats also showed cardiac fibrosis and endoplasmic reticulum (ER) stress activation. Binding immunoglobulin protein (BiP) levels, a marker of ER stress, were correlated with collagen I levels. MitoQ reduced oxidative stress and prevented all these changes without affecting the infarct size. The LVEF and E/A ratio in patients with MI were 57.6 ± 7.9% and 0.96 ± 0.34, respectively. No major changes in cardiac function, extracellular volume fraction (ECV), or LV mass were observed at follow-up. Interestingly, the myeloperoxidase (MPO) levels were associated with the ECV in basal conditions. BiP staining and collagen content were also higher in cardiac samples from autopsies of patients who had suffered an MI than in those who had died from other causes. These results show the interactions between mitochondrial oxidative stress and ER stress, which can result in the development of diffuse fibrosis in the context of MI.
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Affiliation(s)
- Francisco V. Souza-Neto
- Departamento de Fisiología, Facultad de Medicina, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Universidad Complutense de Madrid, 28040 Madrid, Spain; (F.V.S.-N.); (S.J.-G.); (A.R.-M.); (B.D.-V.)
| | - Fabian Islas
- Servicio de Cardiología, Instituto Cardiovascular, Hospital Clínico San Carlos, 28040 Madrid, Spain; (F.I.); (M.L.)
| | - Sara Jiménez-González
- Departamento de Fisiología, Facultad de Medicina, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Universidad Complutense de Madrid, 28040 Madrid, Spain; (F.V.S.-N.); (S.J.-G.); (A.R.-M.); (B.D.-V.)
| | - María Luaces
- Servicio de Cardiología, Instituto Cardiovascular, Hospital Clínico San Carlos, 28040 Madrid, Spain; (F.I.); (M.L.)
| | - Bunty Ramchandani
- Servicio de Cirugía Cardiaca Infantil, Hospital La Paz, 28046 Madrid, Spain;
| | - Ana Romero-Miranda
- Departamento de Fisiología, Facultad de Medicina, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Universidad Complutense de Madrid, 28040 Madrid, Spain; (F.V.S.-N.); (S.J.-G.); (A.R.-M.); (B.D.-V.)
| | - Beatriz Delgado-Valero
- Departamento de Fisiología, Facultad de Medicina, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Universidad Complutense de Madrid, 28040 Madrid, Spain; (F.V.S.-N.); (S.J.-G.); (A.R.-M.); (B.D.-V.)
| | - Elena Roldan-Molina
- Biobanco del Hospital Clínico San Carlos, Instituto de Investigación de Salud del Hospital Clínico San Carlos, 28040 Madrid, Spain; (E.R.-M.); (L.O.-M.)
| | - Melchor Saiz-Pardo
- Departamento de Patología, Hospital Clínico San Carlos, 28040 Madrid, Spain; (M.S.-P.); (M.Á.C.-N.)
- Departamento de Medicina Legal, Psiquiatría y Patología, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Mª Ángeles Cerón-Nieto
- Departamento de Patología, Hospital Clínico San Carlos, 28040 Madrid, Spain; (M.S.-P.); (M.Á.C.-N.)
| | - Luis Ortega-Medina
- Biobanco del Hospital Clínico San Carlos, Instituto de Investigación de Salud del Hospital Clínico San Carlos, 28040 Madrid, Spain; (E.R.-M.); (L.O.-M.)
- Departamento de Patología, Hospital Clínico San Carlos, 28040 Madrid, Spain; (M.S.-P.); (M.Á.C.-N.)
- Departamento de Medicina Legal, Psiquiatría y Patología, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Ernesto Martínez-Martínez
- Departamento de Fisiología, Facultad de Medicina, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Universidad Complutense de Madrid, 28040 Madrid, Spain; (F.V.S.-N.); (S.J.-G.); (A.R.-M.); (B.D.-V.)
- Ciber de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28222 Majadahonda, Spain
- Correspondence: (E.M.-M.); (V.C.); Tel.: +34-91-3941483 (E.M.-M.); +34-91-3941489 (V.C.)
| | - Victoria Cachofeiro
- Departamento de Fisiología, Facultad de Medicina, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Universidad Complutense de Madrid, 28040 Madrid, Spain; (F.V.S.-N.); (S.J.-G.); (A.R.-M.); (B.D.-V.)
- Ciber de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28222 Majadahonda, Spain
- Correspondence: (E.M.-M.); (V.C.); Tel.: +34-91-3941483 (E.M.-M.); +34-91-3941489 (V.C.)
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4
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Groenendyk J, Wang WA, Robinson A, Michalak M. Calreticulin and the Heart. Cells 2022; 11:cells11111722. [PMID: 35681417 PMCID: PMC9179554 DOI: 10.3390/cells11111722] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/13/2022] [Accepted: 05/17/2022] [Indexed: 11/30/2022] Open
Abstract
Calreticulin is an endoplasmic Ca2+ binding protein and molecular chaperone. As a cardiac embryonic gene, calreticulin is essential for heart development. The protein supports Ca2+-dependent signaling events that are critical to cardiomyocyte differentiation and cardiogenesis. The increased expression of calreticulin and endoplasmic reticulum/sarcoplasmic reticulum Ca2+ capacity produces cardiomyocytes with enhanced efficiency, and detrimental mechanical stretching of cardiac fibroblasts, leading to cardiac pathology. Deletion of the calreticulin gene in adult cardiomyocytes results in left ventricle dilation, an impaired electrocardiogram, and heart failure. These observations indicate that a well-adjusted endoplasmic reticulum and calreticulin-dependent Ca2+ pool in cardiomyocytes are critical for the maintenance of proper cardiac function.
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Affiliation(s)
- Jody Groenendyk
- Correspondence: (J.G.); (M.M.); Tel.: +1-780-492-2256 (M.M.)
| | | | | | - Marek Michalak
- Correspondence: (J.G.); (M.M.); Tel.: +1-780-492-2256 (M.M.)
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5
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Frustaci A, De Luca A, Galea N, Verardo R, Guida V, Carrozzo R, Chimenti C, Frustaci E, Sansone L, Russo MA. Novel dilated cardiomyopathy associated to Calreticulin and Myo7A gene mutation in Usher syndrome. ESC Heart Fail 2021; 8:2310-2315. [PMID: 33835720 PMCID: PMC8120391 DOI: 10.1002/ehf2.13260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/01/2021] [Accepted: 02/06/2021] [Indexed: 12/19/2022] Open
Abstract
We report a novel cardiomyopathy associated to Usher syndrome and related to combined mutation of MYO7A and Calreticulin genes. A 37‐year‐old man with deafness and vision impairment because of retinitis pigmentosa since childhood and a MYO7A gene mutation suggesting Usher syndrome, developed a dilated cardiomyopathy with ventricular tachyarrhythmias and recurrent syncope. At magnetic resonance cardiomyopathy was characterized by left ventricular dilatation with hypo‐contractility and mitral prolapse with valve regurgitation. At left ventricular endomyocardial biopsy, it was documented cardiomyocyte disconnection because of cytoskeletal disorganization of cell‐to‐cell contacts, including intercalated discs, and mitochondrial damage and dysfunction with significant reduction of adenosine triphosphate production in patient cultured fibroblasts. At an extensive analysis by next‐generation‐sequencing of 4183 genes potentially related to the cardiomyopathy a pathogenic mutation of calreticulin was found. The cardiomyopathy appeared to be functionally and electrically stabilized by a combination therapy including carvedilol and amiodarone at a follow‐up of 18 months.
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Affiliation(s)
- Andrea Frustaci
- Department of Clinical, Internal, Anesthesiologist and Cardiovascular SciencesSapienza UniversityViale del Policlinico 155Rome00161Italy
- Cellular and Molecular Cardiology LabIRCCS L. SpallanzaniRomeItaly
| | - Alessandro De Luca
- Medical Genetics DivisionFondazione IRCSS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Nicola Galea
- Department of Experimental MedicineSapienza UniversityRomeItaly
| | - Romina Verardo
- Cellular and Molecular Cardiology LabIRCCS L. SpallanzaniRomeItaly
| | - Valentina Guida
- Medical Genetics DivisionFondazione IRCSS Casa Sollievo della SofferenzaSan Giovanni RotondoItaly
| | - Rosalba Carrozzo
- Molecular Medicine Laboratory, Department of Neuroscience and NeurorehabilitationIRCCS Bambino Gesù Pediatric HospitalRomeItaly
| | - Cristina Chimenti
- Department of Clinical, Internal, Anesthesiologist and Cardiovascular SciencesSapienza UniversityViale del Policlinico 155Rome00161Italy
- Cellular and Molecular Cardiology LabIRCCS L. SpallanzaniRomeItaly
| | | | - Luigi Sansone
- Laboratory of Molecular and Cellular PathologyIRCCS San Raffaele PisanaRomeItaly
| | - Matteo Antonio Russo
- MEBIC ConsortiumSan Raffaele Open University and IRCCS San Raffaele PisanaRomeItaly
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6
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Rigaud C, Eriksson A, Rokka A, Skaugen M, Lihavainen J, Keinänen M, Lehtivuori H, Vehniäinen ER. Retene, pyrene and phenanthrene cause distinct molecular-level changes in the cardiac tissue of rainbow trout (Oncorhynchus mykiss) larvae, part 2 - Proteomics and metabolomics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 746:141161. [PMID: 32750582 DOI: 10.1016/j.scitotenv.2020.141161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/09/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are global contaminants of concern. Despite several decades of research, their mechanisms of toxicity are not very well understood. Early life stages of fish are particularly sensitive with the developing cardiac tissue being a main target of PAHs toxicity. The mechanisms of cardiotoxicity of the three widespread model polycyclic aromatic hydrocarbons (PAHs) retene, pyrene and phenanthrene were explored in rainbow trout (Oncorhynchus mykiss) early life stages. Newly hatched larvae were exposed to sublethal doses of each individual PAH causing no detectable morphometric alterations. Changes in the cardiac proteome and metabolome were assessed after 7 or 14 days of exposure to each PAH. Phase I and II enzymes regulated by the aryl hydrocarbon receptor were significantly induced by all PAHs, with retene being the most potent compound. Retene significantly altered the level of several proteins involved in key cardiac functions such as muscle contraction, cellular tight junctions or calcium homeostasis. Those findings were quite consistent with previous reports regarding the effects of retene on the cardiac transcriptome. Significant changes in proteins linked to iron and heme metabolism were observed following exposure to pyrene. While phenanthrene also altered the levels of several proteins in the cardiac tissue, no clear mechanisms or pathways could be highlighted. Due to high variability between samples, very few significant changes were detected in the cardiac metabolome overall. Slight but significant changes were still observed for pyrene and phenanthrene, suggesting possible effects on several energetic or signaling pathways. This study shows that early exposure to different PAHs can alter the expression of key proteins involved in the cardiac function, which could potentially affect negatively the fitness of the larvae and later of the juvenile fish.
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Affiliation(s)
- Cyril Rigaud
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland.
| | - Andreas Eriksson
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Anne Rokka
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
| | - Morten Skaugen
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - Jenna Lihavainen
- Department of Environmental and Biological Sciences, Joensuu Campus, University of Eastern Finland, Joensuu, Finland
| | - Markku Keinänen
- Department of Environmental and Biological Sciences, Joensuu Campus, University of Eastern Finland, Joensuu, Finland
| | - Heli Lehtivuori
- Department of Physics, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Eeva-Riikka Vehniäinen
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
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7
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Groenendyk J, Wang Q, Wagg C, Lee D, Robinson A, Barr A, Light PE, Lopaschuk GD, Agellon LB, Michalak M. Selective enhancement of cardiomyocyte efficiency results in a pernicious heart condition. PLoS One 2020; 15:e0236457. [PMID: 32790682 PMCID: PMC7425937 DOI: 10.1371/journal.pone.0236457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 07/05/2020] [Indexed: 12/24/2022] Open
Abstract
Transgenic mice with selective induction of calreticulin transgene expression in cardiomyocytes (CardiacCRT+) were analyzed. CardiacCRT+ cardiomyocytes showed increased contractility and Ca2+ transients. Yet, in vivo assessment of cardiac performance, and ischemic tolerance of CardiacCRT+ mice demonstrated right ventricle dilation and reduced cardiac output, increased QT interval and decreased P amplitude. Paradoxically, ex vivo working hearts from CardiacCRT+ mice showed enhanced ischemic cardio-protection and cardiac efficiency. Under aerobic conditions, CardiacCRT+ hearts showed less efficient cardiac function than sham control hearts due to an increased ATP production from glycolysis relative to glucose oxidation. During reperfusion, this inefficiency was reversed, with CardiacCRT+ hearts exhibiting better functional recovery and increased cardiac efficiency compared to sham control hearts. On the other hand, mechanical stretching of isolated cardiac fibroblasts activated the IRE1α branch of the unfolded protein response pathway as well as induction of Col1A2 and TGFβ gene expression ex vivo, which were all suppressed by tauroursodeoxycholic acid.
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Affiliation(s)
- Jody Groenendyk
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Qian Wang
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Cory Wagg
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Dukgyu Lee
- School of Human Nutrition, McGill University, Ste. Anne de Bellevue, Quebec, Canada
| | - Alison Robinson
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Amy Barr
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
- School of Human Nutrition, McGill University, Ste. Anne de Bellevue, Quebec, Canada
| | - Peter E. Light
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - Gary D. Lopaschuk
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Luis B. Agellon
- School of Human Nutrition, McGill University, Ste. Anne de Bellevue, Quebec, Canada
- * E-mail: (MM); (LBA)
| | - Marek Michalak
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
- * E-mail: (MM); (LBA)
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8
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Stoner MW, McTiernan CF, Scott I, Manning JR. Calreticulin expression in human cardiac myocytes induces ER stress-associated apoptosis. Physiol Rep 2020; 8:e14400. [PMID: 32323496 PMCID: PMC7177173 DOI: 10.14814/phy2.14400] [Citation(s) in RCA: 5] [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: 11/26/2019] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 12/17/2022] Open
Abstract
The global burden of heart failure following myocardial ischemia-reperfusion (IR) injury is a growing problem. One pathway that is key to understanding the progression of myocardial infarction and IR injury is the endoplasmic reticulum (ER) stress pathway, which contributes to apoptosis signaling and tissue death. The role of calreticulin in the progression of ER stress remains controversial. We hypothesized that calreticulin induction drives proapoptotic signaling in response to ER stress. We find here that calreticulin is upregulated in human ischemic heart failure cardiac tissue, as well as simulated hypoxia and reoxygenation (H/R) and thapsigargin-mediated ER stress. To test the impact of direct modulation of calreticulin expression on ER stress-induced apoptosis, human cardiac-derived AC16 cells with stable overexpression or silencing of calreticulin were subjected to thapsigargin treatment, and markers of apoptosis were evaluated. It was found that overexpression of calreticulin promotes apoptosis, while a partial knockdown protects against the expression of caspase 12, CHOP, and reduces thapsigargin-driven TUNEL staining. These data shed light on the role that calreticulin plays in apoptosis signaling during ER stress in cardiac cells.
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Affiliation(s)
- Michael W. Stoner
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
| | - Charles F. McTiernan
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
| | - Iain Scott
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
| | - Janet R. Manning
- Division of CardiologyDepartment of MedicineUniversity of PittsburghPittsburghPAUSA
- Department of MedicineVascular Medicine InstituteUniversity of PittsburghPittsburghPAUSA
- Department of MedicineCenter for Metabolism and Mitochondrial MedicineUniversity of PittsburghPAUSA
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9
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Michalak M, Agellon LB. Stress Coping Strategies in the Heart: An Integrated View. Front Cardiovasc Med 2018; 5:168. [PMID: 30519562 PMCID: PMC6258784 DOI: 10.3389/fcvm.2018.00168] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 11/02/2018] [Indexed: 12/15/2022] Open
Abstract
The heart is made up of an ordered amalgam of cardiac cell types that work together to coordinate four major processes, namely energy production, electrical conductance, mechanical work, and tissue remodeling. Over the last decade, a large body of information has been amassed regarding how different cardiac cell types respond to cellular stress that affect the functionality of their elaborate intracellular membrane networks, the cellular reticular network. In the context of the heart, the manifestations of stress coping strategies likely differ depending on the coping strategy outcomes of the different cardiac cell types, and thus may underlie the development of distinct cardiac disorders. It is not clear whether all cardiac cell types have similar sensitivity to cellular stress, how specific coping response strategies modify their unique roles, and how their metabolic status is communicated to other cells within the heart. Here we discuss our understanding of the roles of specialized cardiac cells that together make the heart function as an organ with the ability to pump blood continuously and follow a regular rhythm.
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Affiliation(s)
- Marek Michalak
- Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
| | - Luis B Agellon
- School of Human Nutrition, McGill University, Ste. Anne de Bellevue, QC, Canada
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Cardoso AL, Fernandes A, Aguilar-Pimentel JA, de Angelis MH, Guedes JR, Brito MA, Ortolano S, Pani G, Athanasopoulou S, Gonos ES, Schosserer M, Grillari J, Peterson P, Tuna BG, Dogan S, Meyer A, van Os R, Trendelenburg AU. Towards frailty biomarkers: Candidates from genes and pathways regulated in aging and age-related diseases. Ageing Res Rev 2018; 47:214-277. [PMID: 30071357 DOI: 10.1016/j.arr.2018.07.004] [Citation(s) in RCA: 276] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/08/2018] [Accepted: 07/10/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Use of the frailty index to measure an accumulation of deficits has been proven a valuable method for identifying elderly people at risk for increased vulnerability, disease, injury, and mortality. However, complementary molecular frailty biomarkers or ideally biomarker panels have not yet been identified. We conducted a systematic search to identify biomarker candidates for a frailty biomarker panel. METHODS Gene expression databases were searched (http://genomics.senescence.info/genes including GenAge, AnAge, LongevityMap, CellAge, DrugAge, Digital Aging Atlas) to identify genes regulated in aging, longevity, and age-related diseases with a focus on secreted factors or molecules detectable in body fluids as potential frailty biomarkers. Factors broadly expressed, related to several "hallmark of aging" pathways as well as used or predicted as biomarkers in other disease settings, particularly age-related pathologies, were identified. This set of biomarkers was further expanded according to the expertise and experience of the authors. In the next step, biomarkers were assigned to six "hallmark of aging" pathways, namely (1) inflammation, (2) mitochondria and apoptosis, (3) calcium homeostasis, (4) fibrosis, (5) NMJ (neuromuscular junction) and neurons, (6) cytoskeleton and hormones, or (7) other principles and an extensive literature search was performed for each candidate to explore their potential and priority as frailty biomarkers. RESULTS A total of 44 markers were evaluated in the seven categories listed above, and 19 were awarded a high priority score, 22 identified as medium priority and three were low priority. In each category high and medium priority markers were identified. CONCLUSION Biomarker panels for frailty would be of high value and better than single markers. Based on our search we would propose a core panel of frailty biomarkers consisting of (1) CXCL10 (C-X-C motif chemokine ligand 10), IL-6 (interleukin 6), CX3CL1 (C-X3-C motif chemokine ligand 1), (2) GDF15 (growth differentiation factor 15), FNDC5 (fibronectin type III domain containing 5), vimentin (VIM), (3) regucalcin (RGN/SMP30), calreticulin, (4) PLAU (plasminogen activator, urokinase), AGT (angiotensinogen), (5) BDNF (brain derived neurotrophic factor), progranulin (PGRN), (6) α-klotho (KL), FGF23 (fibroblast growth factor 23), FGF21, leptin (LEP), (7) miRNA (micro Ribonucleic acid) panel (to be further defined), AHCY (adenosylhomocysteinase) and KRT18 (keratin 18). An expanded panel would also include (1) pentraxin (PTX3), sVCAM/ICAM (soluble vascular cell adhesion molecule 1/Intercellular adhesion molecule 1), defensin α, (2) APP (amyloid beta precursor protein), LDH (lactate dehydrogenase), (3) S100B (S100 calcium binding protein B), (4) TGFβ (transforming growth factor beta), PAI-1 (plasminogen activator inhibitor 1), TGM2 (transglutaminase 2), (5) sRAGE (soluble receptor for advanced glycosylation end products), HMGB1 (high mobility group box 1), C3/C1Q (complement factor 3/1Q), ST2 (Interleukin 1 receptor like 1), agrin (AGRN), (6) IGF-1 (insulin-like growth factor 1), resistin (RETN), adiponectin (ADIPOQ), ghrelin (GHRL), growth hormone (GH), (7) microparticle panel (to be further defined), GpnmB (glycoprotein nonmetastatic melanoma protein B) and lactoferrin (LTF). We believe that these predicted panels need to be experimentally explored in animal models and frail cohorts in order to ascertain their diagnostic, prognostic and therapeutic potential.
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Sun Y, Wang Q, Fang Y, Wu C, Lu G, Chen Z. Activation of the Nkx2.5-Calr-p53 signaling pathway by hyperglycemia induces cardiac remodeling and dysfunction in adult zebrafish. Dis Model Mech 2017; 10:1217-1227. [PMID: 28801532 PMCID: PMC5665450 DOI: 10.1242/dmm.026781] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 07/31/2017] [Indexed: 01/19/2023] Open
Abstract
Hyperglycemia is an independent risk factor for diabetic cardiomyopathy in humans; however, the underlying mechanisms have not been thoroughly elucidated. Zebrafish (Danio rerio) was used in this study as a novel vertebrate model to explore the signaling pathways of human adult cardiomyopathy. Hyperglycemia was induced by alternately immersing adult zebrafish in a glucose solution or water. The hyperglycemic fish gradually exhibited some hallmarks of cardiomyopathy such as myocardial hypertrophy and apoptosis, myofibril loss, fetal gene reactivation, and severe arrhythmia. Echocardiography of the glucose-treated fish demonstrated diastolic dysfunction at an early stage and systolic dysfunction at a later stage, consistent with what is observed in diabetic patients. Enlarged hearts with decreased myocardial density, accompanied by decompensated cardiac function, indicated that apoptosis was critical in the pathological process. Significant upregulation of the expression of Nkx2.5 and its downstream targets calreticulin (Calr) and p53 was noted in the glucose-treated fish. High-glucose stimulation in vitro evoked marked apoptosis of primary cardiomyocytes, which was rescued by the p53 inhibitor pifithrin-μ. In vitro experiments were performed using compound treatment and genetically via cell infection. Genetically, knockout of Nkx2.5 induced decreased expression of Nkx2.5, Calr and p53 Upregulation of Calr resulted in increased p53 expression, whereas the level of Nkx2.5 remained unchanged. An adult zebrafish model of hyperglycemia-induced cardiomyopathy was successfully established. Hyperglycemia-induced myocardial apoptosis was mediated, at least in part, by activation of the Nkx2.5-Calr-p53 pathway in vivo, resulting in cardiac dysfunction and hyperglycemia-induced cardiomyopathy.
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Affiliation(s)
- Yanyi Sun
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, 197, Ruijin Er Road, Shanghai, 200025, China
| | - Qiuyun Wang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, 197, Ruijin Er Road, Shanghai, 200025, China
| | - Yuehua Fang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, 197, Ruijin Er Road, Shanghai, 200025, China
| | - Chunfang Wu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, 197, Ruijin Er Road, Shanghai, 200025, China
| | - Guoping Lu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, 197, Ruijin Er Road, Shanghai, 200025, China
| | - Zhenyue Chen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, 197, Ruijin Er Road, Shanghai, 200025, China
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Zhou Q, Hahn JK, Neupane B, Aidery P, Labeit S, Gawaz M, Gramlich M. Dysregulated IER3 Expression is Associated with Enhanced Apoptosis in Titin-Based Dilated Cardiomyopathy. Int J Mol Sci 2017; 18:E723. [PMID: 28353642 PMCID: PMC5412309 DOI: 10.3390/ijms18040723] [Citation(s) in RCA: 10] [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: 01/09/2017] [Revised: 03/02/2017] [Accepted: 03/24/2017] [Indexed: 12/22/2022] Open
Abstract
Apoptosis (type I programmed cell death) of cardiomyocytes is a major process that plays a role in the progression of heart failure. The early response gene IER3 regulates apoptosis in a wide variety of cells and organs. However, its role in heart failure is largely unknown. Here, we investigate the role of IER3 in an inducible heart failure mouse model. Heart failure was induced in a mouse model that imitates a human titin truncation mutation we found in a patient with dilated cardiomyopathy (DCM). Transferase dUTP nick end labeling (TUNEL) and ssDNA stainings showed induction of apoptosis in titin-deficient cardiomyocytes during heart failure development, while IER3 response was dysregulated. Chromatin immunoprecipitation and knock-down experiments revealed that IER3 proteins target the promotors of anti-apoptotic genes and act as an anti-apoptotic factor in cardiomyocytes. Its expression is blunted during heart failure development in a titin-deficient mouse model. Targeting the IER3 pathway to reduce cardiac apoptosis might be an effective therapeutic strategy to combat heart failure.
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Affiliation(s)
- Qifeng Zhou
- Department of Cardiology and Cardiovascular Diseases, Eberhard Karls University, 72076 Tübingen, Germany.
| | - Julia Kelley Hahn
- Department of Cardiology and Cardiovascular Diseases, Eberhard Karls University, 72076 Tübingen, Germany.
| | - Balram Neupane
- Department of Cardiology and Cardiovascular Diseases, Eberhard Karls University, 72076 Tübingen, Germany.
| | - Parwez Aidery
- Department of Cardiology and Cardiovascular Diseases, Eberhard Karls University, 72076 Tübingen, Germany.
| | - Siegfried Labeit
- Institute for Integrative Pathophysiology, Universitätsmedizin Mannheim, 68167 Mannheim, Germany.
| | - Meinrad Gawaz
- Department of Cardiology and Cardiovascular Diseases, Eberhard Karls University, 72076 Tübingen, Germany.
| | - Michael Gramlich
- Department of Cardiology and Cardiovascular Diseases, Eberhard Karls University, 72076 Tübingen, Germany.
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Yang N, Yu F, Shao G, Fu Y, Kong W. The E3 ubiquitin ligase c-Cbl mediates integrin β1 ubiquitination during dilated cardiomyopathy. Biochem Biophys Res Commun 2016; 479:728-735. [DOI: 10.1016/j.bbrc.2016.09.144] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Accepted: 09/27/2016] [Indexed: 11/26/2022]
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Groenendyk J, Lee D, Jung J, Dyck JRB, Lopaschuk GD, Agellon LB, Michalak M. Inhibition of the Unfolded Protein Response Mechanism Prevents Cardiac Fibrosis. PLoS One 2016; 11:e0159682. [PMID: 27441395 PMCID: PMC4956237 DOI: 10.1371/journal.pone.0159682] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 07/05/2016] [Indexed: 12/24/2022] Open
Abstract
Background Cardiac fibrosis attributed to excessive deposition of extracellular matrix proteins is a major cause of heart failure and death. Cardiac fibrosis is extremely difficult and challenging to treat in a clinical setting due to lack of understanding of molecular mechanisms leading to cardiac fibrosis and effective anti-fibrotic therapies. The objective in this study was to examine whether unfolded protein response (UPR) pathway mediates cardiac fibrosis and whether a pharmacological intervention to modulate UPR can prevent cardiac fibrosis and preserve heart function. Methodology/Principal Findings We demonstrate here that the mechanism leading to development of fibrosis in a mouse with increased expression of calreticulin, a model of heart failure, stems from impairment of endoplasmic reticulum (ER) homeostasis, transient activation of the unfolded protein response (UPR) pathway and stimulation of the TGFβ1/Smad2/3 signaling pathway. Remarkably, sustained pharmacologic inhibition of the UPR pathway by tauroursodeoxycholic acid (TUDCA) is sufficient to prevent cardiac fibrosis, and improved exercise tolerance. Conclusions We show that the mechanism leading to development of fibrosis in a mouse model of heart failure stems from transient activation of UPR pathway leading to persistent remodelling of cardiac tissue. Blocking the activation of the transiently activated UPR pathway by TUDCA prevented cardiac fibrosis, and improved prognosis. These findings offer a window for additional interventions that can preserve heart function.
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Affiliation(s)
- Jody Groenendyk
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
| | - Dukgyu Lee
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
- School of Dietetics and Human Nutrition, McGill University, Ste. Anne de Bellevue, Quebec, H9X 3V9, Canada
| | - Joanna Jung
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
| | - Jason R. B. Dyck
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
| | - Gary D. Lopaschuk
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
- Department of Pharmacology, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
| | - Luis B. Agellon
- School of Dietetics and Human Nutrition, McGill University, Ste. Anne de Bellevue, Quebec, H9X 3V9, Canada
- * E-mail: (MM); (LBA)
| | - Marek Michalak
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada
- * E-mail: (MM); (LBA)
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Xu X, Li H. Integrated microRNA‑gene analysis of coronary artery disease based on miRNA and gene expression profiles. Mol Med Rep 2016; 13:3063-73. [PMID: 26936111 PMCID: PMC4805068 DOI: 10.3892/mmr.2016.4936] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 01/12/2016] [Indexed: 12/14/2022] Open
Abstract
The present study aimed to investigate the key genes and microRNAs (miRNA/miRs) associated with coronary artery disease (CAD) progression. The gene expression profile of GSE20680 and GSE12288, and the miRNA expression profile of GSE28858 were downloaded from the gene expression omnibus database. The differentially expressed genes (DEGs) in GSE20680 and GSE12288, and the differentially expressed miRNAs in GSE28858 were screened using the limma package in R software. Common DEGs between GSE20680 and GSE12288 were selected. Functions and pathways of DEGs and miRNAs were enriched using the DAVID tool from the GO and KEGG databases. The regulatory network of miRNA and selected CAD-associated DEGs was constructed. A total of 270 DEGs (167 upregulated and 103 downregulated) based on the GSE20680 dataset, and 2,268 DEGs (534 upregulated and 1,734 downregulated) based on the GSE12288 dataset, were screened. For the differentially expressed miRNAs, 214 were identified (102 upregulated and 112 downregulated) in CAD samples and were screened. Interferon regulatory factor 2 (IRF2) and cell death-inducing DFFA-like effector b (CIDEB), which are regulated by signal transducer and activator of transcription 3 and myc-associated factor X, were identified as common DEGs for CAD. miR-455-5p, miR-455-3p and miR-1257, which are involved in the major histocompatibility complex (MHC)protein assembly pathway and peptide antigen assembly with MHC class I protein complex pathway, may regulate various miRNAs and target genes, including pro-opiomelancortin (POMC), toll-like receptor 4 (TLR4), interleukin 10 (IL10), activating transcription factor 6 (ATF6) and calreticulin (CALR). The current study identified IRF2 and CIDEB as crucial genes, and miRNA-455-5p, miRNA-455-3p and miR-1257 along with their target genes POMC, TLR4 and CALR, as miRNAs involved in CAD progression. Thus, the present study may provide a basis for future research into the progression mechanism of CAD.
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Affiliation(s)
- Xiangdong Xu
- Vasculocardiology Department, Jiading Central Hospital, Shanghai 201800, P.R China
| | - Hongsong Li
- Vasculocardiology Department, Jiading Central Hospital, Shanghai 201800, P.R China
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Wang J, Hao J, He N, Ji C, Ma D. The Mutation Profile of Calreticulin in Patients with Myeloproliferative Neoplasms and Acute Leukemia. Turk J Haematol 2015; 33:180-6. [PMID: 26377485 PMCID: PMC5111462 DOI: 10.4274/tjh.2015.0220] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
OBJECTIVE Calreticulin (CALR) plays important roles in cell proliferation, apoptosis, and immune responses. CALR mutations were described recently in Janus kinase 2 gene (JAK2)-negative or MPL-negative primary myelofibrosis (PMF) and essential thrombocythemia (ET) patients. CALR trails JAK2 as the second most mutated gene in myeloproliferative neoplasms (MPNs). However, little is known about CALR mutation in Chinese patients with leukemia. In the present study, a cohort of 305 Chinese patients with hematopoietic neoplasms was screened for CALR mutations, with the aim of uncovering the frequency of CALR mutations in leukemia and MPNs. MATERIALS AND METHODS Polymerase chain reaction and direct sequencing were performed to analyze mutations of CALR in 305 patients with hematopoietic malignancies, including 135 acute myeloid leukemia patients, 57 acute lymphoblastic leukemia patients, and 113 MPN patients. RESULTS CALR mutations were found in 10.6% (12 of 113) of samples from patients with MPNs. CALR mutations were determined in 11.3% (6 of 53), 21.7% (5 of 23), and 9.1% (1/11) of patients with ET, PMF, and unclassifiable MPN, respectively. CONCLUSION We showed that MPN patients carrying CALR mutations presented with higher platelet counts and lower hemoglobin levels compared to those with mutated JAK2. However, all of the leukemia patients had negative results for CALR mutations.
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Affiliation(s)
| | | | | | | | - Daoxin Ma
- Qilu Hospital of Shandong University, Department of Hematology, Shandong, China, Phone: +86 531 82169887, E-mail:
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17
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An W, Wan Y, Guo Y, Chen X, Ren Y, Zhang J, Chang L, Wei W, Zhang P, Zhu X. CALR mutation screening in pediatric primary myelofibrosis. Pediatr Blood Cancer 2014; 61:2256-62. [PMID: 25176567 DOI: 10.1002/pbc.25211] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 07/11/2014] [Indexed: 01/20/2023]
Abstract
BACKGROUND Primary myelofibrosis (PMF) is quite rare in children. Mutations of JAK2(V617F) or MPL(W515K/L) were absent in pediatric patients with PMF according to previous studies. Recently, mutations in calreticulin (CALR) were described in adult patients with JAK2/MPL-unmutated PMF. Our study aimed to analyze the clinical and genetic features of Chinese pediatric patients with PMF. PROCEDURES We retrospectively investigated 14 pediatric patients diagnosed as PMF according to WHO 2008 criteria. Direct sequencing was performed for the existence of genetic alterations in JAK2, MPL, TET2, CBL, ASXL1, IDH1, IDH2, SRSF2, EZH2, DNMT3A and CALR. RESULTS In our cohort, all patients had anemia, three patients (21%) had splenomegaly, six patients (43%) had micromegakaryocytes at time of diagnosis. No patient had spontaneous remission and six patients (43%) transformed to acute myelocytic leukemia. In nine patients with evaluable cytogenetic information, three subjects (33%) had abnormal karyotypes. The median survival from time of diagnosis was 28 months. Seven patients (50%) had type 2 mutations of CALR. No patient had mutations in the other candidate genes. There was no statistical differences in age, gender, hemoglobin, WBC, neutrophil and platelet counts, percentage of circulating blast, overall survival and leukemia transformation between patients with and without CALR mutation. CONCLUSION Our study documented that Chinese pediatric patients with PMF in our cohort had its own clinical characteristics and poor outcome. CALR mutations were detected in 50% of our pediatric patients with PMF. Based on our study, CALR mutations screening could be used as molecular marker for diagnosis of pediatric patients with PMF.
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Affiliation(s)
- Wenbin An
- Pediatric Blood Diseases Centre, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
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Shan H, Wei J, Zhang M, Lin L, Yan R, Zhu Y, Zhang R. Calreticulin is localized at mitochondria of rat cardiomyocytes and affected by furazolidone. Mol Cell Biochem 2014; 397:125-30. [PMID: 25087122 DOI: 10.1007/s11010-014-2179-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 07/24/2014] [Indexed: 11/29/2022]
Abstract
Calreticulin (CRT) is a calcium-buffering protein which is predominantly located in endoplasmic reticulum. In the previous mitochondria proteome analysis, we accidentally found that CRT may be also localized at myocardial mitochondria and was upregulated in a rat model of furazolidone-induced dilated cardiomyopathy. To our knowledge, there has not yet been any report of its presence in mitochondria of any cell types. The present study aimed to determine whether CRT was located at the mitochondria of rat cardiomyocytes and whether the mitochondrial CRT was affected by furazolidone. Mitochondrial preparations were isolated from primary cultured neonatal rat cardiomyocytes and purified by differential centrifugation. The purity of mitochondria was assessed by the reduction or elimination of the immunoreactivities of markers for cytosol, nucleus, sarcolemma, and endoplasmic reticulum. Western blot analysis demonstrated the presence of CRT in purified mitochondria of rat cardiomyocytes. The distribution of CRT to mitochondria was further confirmed by immuno-electron microscopy, flow cytometry, and laser scanning confocal microscopy (double staining with MitoTracker Red and CRT-Alexa Fluor 488). Western blot analysis also demonstrated that the mitochondrial content of CRT was significantly enhanced by furazolidone treatment by 2.73 ± 0.13 fold (P < 0.05) in rat cardiomyocytes, which was verified by immuno-electron microscopy. In summary, the present results suggest that CRT is localized at mitochondria of rat cardiomyocytes and such localization is affected by furazolidone.
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Affiliation(s)
- Hu Shan
- Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, 710004, Shaanxi, China
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Abstract
Atherosclerosis is a chronic, multifactorial disease that starts in youth, manifests clinically later in life, and can lead to myocardial infarction, stroke, claudication, and death. Although inflammatory processes have long been known to be involved in atherogenesis, interest in this subject has grown in the past 30-40 years. Animal experiments and human analyses of early atherosclerotic lesions have shown that the first pathogenic event in atherogenesis is the intimal infiltration of T cells at arterial branching points. These T cells recognize heat shock protein (HSP)60, which is expressed together with adhesion molecules by endothelial cells in response to classic risk factors for atherosclerosis. Although these HSP60-reactive T cells initiate atherosclerosis, antibodies to HSP60 accelerate and perpetuate the disease. All healthy humans develop cellular and humoral immunity against microbial HSP60 by infection or vaccination. Given that prokaryotic (bacterial) and eukaryotic (for instance, human) HSP60 display substantial sequence homology, atherosclerosis might be the price we pay for this protective immunity, if risk factors stress the vascular endothelial cells beyond physiological conditions.
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Novel distribution of calreticulin to cardiomyocyte mitochondria and its increase in a rat model of dilated cardiomyopathy. Biochem Biophys Res Commun 2014; 449:62-8. [PMID: 24813996 DOI: 10.1016/j.bbrc.2014.04.156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 04/29/2014] [Indexed: 11/21/2022]
Abstract
BACKGROUND Calreticulin (CRT), a Ca(2+)-binding chaperone of the endoplasmic reticulum, can also be found in several other locations including the cytosol, nucleus, secretory granules, the outer side of the plasma membrane, and the extracellular matrix. Whether CRT is localized at mitochondria of cardiomyocytes and whether such localization is affected under DCM are still unclear. METHODS AND RESULTS The DCM model was generated in rats by the daily oral administration of furazolidone for thirty weeks. Echocardiographic and hemodynamic studies demonstrated enlarged left ventricular dimensions and reduced systolic and diastolic function in DCM rats. Immuno-electron microscopy and Western blot showed that CRT was present in cardiomyocyte mitochondria and the mitochondrial content of CRT was increased in DCM hearts (P<0.05). Morphometric analysis showed notable myocardial apoptosis and mitochondrial swelling with fractured or dissolved cristae in the DCM hearts. Compared with the control group, the mitochondrial membrane potential level of the freshly isolated cardiac mitochondria and the enzyme activities of cytochrome c oxidase and succinate dehydrogenase in the model group were significantly decreased (P<0.05), and the myocardial apoptosis index and the caspase activities of caspase-9 and caspase-3 were significantly increased (P<0.05). Pearson linear correlation analysis showed that the mitochondrial content of CRT had negative correlations with the mitochondrial function, and a positive correlation with myocardial apoptosis index (P<0.001). The protein expression level of cytochrome c and the phosphorylation activity of STAT3 in the mitochondrial fraction were significantly decreased in the model group compared with the control group (P<0.05). CONCLUSIONS These data demonstrate that CRT is localized at cardiomyocyte mitochondria and its mitochondrial content is increased in DCM hearts.
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Jung K, Dihazi H, Bibi A, Dihazi GH, Beißbarth T. Adaption of the global test idea to proteomics data with missing values. Bioinformatics 2014; 30:1424-30. [PMID: 24489372 DOI: 10.1093/bioinformatics/btu062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
MOTIVATION Global test procedures are frequently used in gene expression analysis to study the relationship between a functional subset of RNA transcripts and an experimental group factor. However, these procedures have been rarely used for the analysis of high-throughput data from other sources, such as proteome expression data. The main difficulties in transferring global test procedures from genomics to proteomics data are the more complicated way of obtaining functional annotations and the handling of missing values in some types of proteomics data. RESULTS We propose a simple mixed linear model in combination with a permutation procedure and missing values imputation to conduct global tests in proteomics experiments. This new approach is motivated by protein expression data obtained by means of 2-D gel electrophoresis within a mouse experiment of our current research. A simulation study yielded that power and testing level of the mixed model alone can be affected by missing values in the dataset. Imputation of missing values was able to correct for a bias in some simulation settings. Our new approach provides the possibility to rank Gene Ontology (GO) terms associated with protein sets. It is also helpful in the case in which a specific protein is represented by multiple spots on a 2-D gel by considering these spots also as a protein set. Analysis of our data points at correlations between the deficiency of the protein 'calreticulin' and protein sets related to biological processes in the heart muscle. AVAILABILITY AND IMPLEMENTATION Our proposed approach is included in the R-package 'RepeatedHighDim', which already contains a global test procedure for gene expression data. The package can be retrieved from http://cran.r-project.org/. CONTACT klaus.jung@ams.med.uni-goettingen.de.
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Affiliation(s)
- Klaus Jung
- Department of Medical Statistics, and Department of Nephrology and Rheumatology, University Medical Center Göttingen, Göttingen 37099, Germany
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Tefferi A, Lasho TL, Finke CM, Knudson RA, Ketterling R, Hanson CH, Maffioli M, Caramazza D, Passamonti F, Pardanani A. CALR vs JAK2 vs MPL-mutated or triple-negative myelofibrosis: clinical, cytogenetic and molecular comparisons. Leukemia 2014; 28:1472-7. [PMID: 24402162 DOI: 10.1038/leu.2014.3] [Citation(s) in RCA: 398] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Accepted: 12/31/2013] [Indexed: 12/12/2022]
Abstract
Calreticulin (CALR) mutations were recently described in JAK2 and MPL unmutated primary myelofibrosis (PMF) and essential thrombocythemia. In the current study, we compared the clinical, cytogenetic and molecular features of patients with PMF with or without CALR, JAK2 or MPL mutations. Among 254 study patients, 147 (58%) harbored JAK2, 63 (25%) CALR and 21 (8.3%) MPL mutations; 22 (8.7%) patients were negative for all three mutations, whereas one patient expressed both JAK2 and CALR mutations. Study patients were also screened for ASXL1 (31%), EZH2 (6%), IDH (4%), SRSF2 (12%), SF3B1 (7%) and U2AF1 (16%) mutations. In univariate analysis, CALR mutations were associated with younger age (P<0.0001), higher platelet count (P<0.0001) and lower DIPSS-plus score (P=0.02). CALR-mutated patients were also less likely to be anemic, require transfusions or display leukocytosis. Spliceosome mutations were infrequent (P=0.0001) in CALR-mutated patients, but no other molecular or cytogenetic associations were evident. In multivariable analysis, CALR mutations had a favorable impact on survival that was independent of both DIPSS-plus risk and ASXL1 mutation status (P=0.001; HR 3.4 for triple-negative and 2.2 for JAK2-mutated). Triple-negative patients also displayed inferior LFS (P=0.003). The current study identifies 'CALR(-)ASXL1(+)' and 'triple-negative' as high-risk molecular signatures in PMF.
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Affiliation(s)
- A Tefferi
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - T L Lasho
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - C M Finke
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
| | - R A Knudson
- Division of Cytogenetics, Department of Laboratory Medicine, Mayo Clinic, Rochester, MN, USA
| | - R Ketterling
- Division of Cytogenetics, Department of Laboratory Medicine, Mayo Clinic, Rochester, MN, USA
| | - C H Hanson
- Division of Hematopathology, Department of Laboratory Medicine, Mayo Clinic, Rochester, MN, USA
| | - M Maffioli
- Division of Hematology, Ospedale di Circolo, Fondazione Macchi, Varese, Italy
| | - D Caramazza
- Division of Hematology, Ospedale di Circolo, Fondazione Macchi, Varese, Italy
| | - F Passamonti
- Division of Hematology, Ospedale di Circolo, Fondazione Macchi, Varese, Italy
| | - A Pardanani
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
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