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Gao W, Guo N, Yan H, Zhao S, Sun Y, Chen Z. Mycn ameliorates cardiac hypertrophy-induced heart failure in mice by mediating the USP2/JUP/Akt/β-catenin cascade. BMC Cardiovasc Disord 2024; 24:82. [PMID: 38297207 PMCID: PMC10829249 DOI: 10.1186/s12872-024-03748-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 01/23/2024] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND Pathological cardiac hypertrophy is associated with cardiac dysfunction and is a key risk factor for heart failure and even sudden death. This study investigates the function of Mycn in cardiac hypertrophy and explores the interacting molecules. METHODS A mouse model of cardiac hypertrophy was induced by isoproterenol (ISO). The cardiac dysfunction was assessed by the heart weight-to-body weight ratio (HW/BW), echocardiography assessment, pathological staining, biomarker detection, and cell apoptosis. Transcriptome alteration in cardiac hypertrophy was analyzed by bioinformatics analysis. Gain- or loss-of-function studies of MYCN proto-oncogene (Mycn), ubiquitin specific peptidase 2 (USP2), and junction plakoglobin (JUP) were performed. The biological functions of Mycn were further examined in ISO-treated cardiomyocytes. The molecular interactions were verified by luciferase assay or immunoprecipitation assays. RESULTS Mycn was poorly expressed in ISO-treated mice, and its upregulation reduced HW/BW, cell surface area, oxidative stress, and inflammation while improving cardiac function of mice. It also reduced apoptosis of cardiomyocytes in mice and those in vitro induced by ISO. Mycn bound to the USP2 promoter to activate its transcription. USP2 overexpression exerted similar myocardial protective functions. It stabilized JUP protein by deubiquitination modification, which blocked the Akt/β-catenin pathway. Knockdown of JUP restored phosphorylation of Akt and β-catenin protein level, which negated the protective effects of USP2. CONCLUSION This study demonstrates that Mycn activates USP2 transcription, which mediates ubiquitination and protein stabilization of JUP, thus inactivating the Akt/β-catenin axis and alleviating cardiac hypertrophy-induced heart failure.
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Affiliation(s)
- Weinian Gao
- Department of Cardiac Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050000, P.R. China
- Hebei Medical University, Shijiazhuang, Hebei, 050000, P.R. China
| | - Na Guo
- Department of Geriatry II, TCM Hospital of Shijiazhuang city, Shijiazhuang, Hebei, 050000, P.R. China
| | - Hongjiang Yan
- Department of Thoracic surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050000, P.R. China
| | - Shuguang Zhao
- Department of Cardiac Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050000, P.R. China
| | - Yongquan Sun
- Department of Cardiac Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050000, P.R. China
| | - Ziying Chen
- Department of Cardiac Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050000, P.R. China.
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Lin LC, Liu ZY, Tu B, Song K, Sun H, Zhou Y, Sha JM, Zhang Y, Yang JJ, Zhao JY, Tao H. Epigenetic signatures in cardiac fibrosis: Focusing on noncoding RNA regulators as the gatekeepers of cardiac fibroblast identity. Int J Biol Macromol 2024; 254:127593. [PMID: 37898244 DOI: 10.1016/j.ijbiomac.2023.127593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 09/13/2023] [Accepted: 10/19/2023] [Indexed: 10/30/2023]
Abstract
Cardiac fibroblasts play a pivotal role in cardiac fibrosis by transformation of fibroblasts into myofibroblasts, which synthesis and secrete a large number of extracellular matrix proteins. Ultimately, this will lead to cardiac wall stiffness and impaired cardiac performance. The epigenetic regulation and fate reprogramming of cardiac fibroblasts has been advanced considerably in recent decades. Non coding RNAs (microRNAs, lncRNAs, circRNAs) regulate the functions and behaviors of cardiac fibroblasts, including proliferation, migration, phenotypic transformation, inflammation, pyroptosis, apoptosis, autophagy, which can provide the basis for novel targeted therapeutic treatments that abrogate activation and inflammation of cardiac fibroblasts, induce different death pathways in cardiac fibroblasts, or make it sensitive to established pathogenic cells targeted cytotoxic agents and biotherapy. This review summarizes our current knowledge in this field of ncRNAs function in epigenetic regulation and fate determination of cardiac fibroblasts as well as the details of signaling pathways contribute to cardiac fibrosis. Moreover, we will comment on the emerging landscape of lncRNAs and circRNAs function in regulating signal transduction pathways, gene translation processes and post-translational regulation of gene expression in cardiac fibroblast. In the end, the prospect of cardiac fibroblasts targeted therapy for cardiac fibrosis based on ncRNAs is discussed.
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Affiliation(s)
- Li-Chan Lin
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - Zhi-Yan Liu
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - Bin Tu
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - Kai Song
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - He Sun
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - Yang Zhou
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - Ji-Ming Sha
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China
| | - Ye Zhang
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China.
| | - Jing-Jing Yang
- Department of Clinical Pharmacology, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China.
| | - Jian-Yuan Zhao
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China; Institute for Developmental and Regenerative Cardiovascular Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, PR China.
| | - Hui Tao
- Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China; Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, PR China; Institute for Developmental and Regenerative Cardiovascular Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, PR China.
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Rami M, Rahdar S, Ahmadi Hekmatikar A, Awang Daud DM. Highlighting the novel effects of high-intensity interval training on some histopathological and molecular indices in the heart of type 2 diabetic rats. Front Endocrinol (Lausanne) 2023; 14:1175585. [PMID: 37274326 PMCID: PMC10235768 DOI: 10.3389/fendo.2023.1175585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/04/2023] [Indexed: 06/06/2023] Open
Abstract
Background Type 2 diabetes is one of the most common metabolic diseases in recent years and has become an important risk factor for cardiovascular disorders. The first goal is to reduce type 2 diabetes, and in the case of cardiovascular disease, the second goal is to reduce and manage that disorder. Materials and methods The rats were divided into 4 groups: Healthy Control (n=8), Diabetes Control (n=8), Diabetes Training (n=8), and Healthy Training (n=8). The protocol consisted of 8 weeks of High-intensity interval (5 sessions per week), where the training started with 80% of the peak speed in the first week, and 10% was added to this speed every week. To measure the level of B-catenin, c-MYC, GSK3B, and Bcl-2 proteins using the western blot method, cardiac pathological changes were measured using hematoxylin and eosin staining, Masson's trichrome and PAS staining and apoptosis using the TUNEL method. Findings Histological results showed that diabetes causes significant pathological hypertrophy, fibrosis, and severe apoptosis in heart tissue. HIIT training significantly reduced pathological hypertrophy and fibrosis in heart tissue, and the rate of cardiomyocyte apoptosis was greatly reduced. This research showed that diabetes disorder increases the levels of B-catenin and c-Myc proteins and causes a decrease in the expression of GSK3B and Bcl-2 proteins. After eight weeks of HIIT training, the levels of B-catenin and c-Myc proteins decreased significantly, and the levels of GSK3B and Bcl-2 proteins increased. Conclusion This study showed that HIIT could be a suitable strategy to reduce cardiomyopathy in type 2 diabetic rats. However, it is suggested that in future studies, researchers should perform different intensities and exercises to promote exercise goals in type 2 diabetic cardiomyopathy.
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Affiliation(s)
- Mohammad Rami
- Department of Sport Physiology, Faculty of Sport Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Samane Rahdar
- Department of Basic Sciences, Histology section, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Amirhoseein Ahmadi Hekmatikar
- Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran
| | - D. Maryama Awang Daud
- Health Through Exercise and Active Living (HEAL) Research Unit, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
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Balatskyi VV, Sowka A, Dobrzyn P, Piven OO. WNT/β-catenin pathway is a key regulator of cardiac function and energetic metabolism. Acta Physiol (Oxf) 2023; 237:e13912. [PMID: 36599355 DOI: 10.1111/apha.13912] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/24/2022] [Accepted: 01/02/2023] [Indexed: 01/06/2023]
Abstract
The WNT/β-catenin pathway is a master regulator of cardiac development and growth, and its activity is low in healthy adult hearts. However, even this low activity is essential for maintaining normal heart function. Acute activation of the WNT/β-catenin signaling cascade is considered to be cardioprotective after infarction through the upregulation of prosurvival genes and reprogramming of metabolism. Chronically high WNT/β-catenin pathway activity causes profibrotic and hypertrophic effects in the adult heart. New data suggest more complex functions of β-catenin in metabolic maturation of the perinatal heart, establishing an adult pattern of glucose and fatty acid utilization. Additionally, low basal activity of the WNT/β-catenin cascade maintains oxidative metabolism in the adult heart, and this pathway is reactivated by physiological or pathological stimuli to meet the higher energy needs of the heart. This review summarizes the current state of knowledge of the organization of canonical WNT signaling and its function in cardiogenesis, heart maturation, adult heart function, and remodeling. We also discuss the role of the WNT/β-catenin pathway in cardiac glucose, lipid metabolism, and mitochondrial physiology.
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Affiliation(s)
- Volodymyr V Balatskyi
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Adrian Sowka
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Pawel Dobrzyn
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Oksana O Piven
- Laboratory of Molecular Medical Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
- Department of Human Genetics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
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5
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Wang K, Zhou M, Zhang Y, Du Y, Li P, Guan C, Huang Z. IRX2 activated by jumonji domain-containing protein 2A is crucial for cardiac hypertrophy and dysfunction in response to the hypertrophic stimuli. Int J Cardiol 2023; 371:332-344. [PMID: 36181956 DOI: 10.1016/j.ijcard.2022.09.070] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/25/2022] [Accepted: 09/26/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND Iroquois homeobox 2 (IRX2) is a member of the Iroquois family whose upregulation has been potentially correlated to cardiac hypertrophy. This work studied the function of IRX2 and its related molecules in hypertrophic cardiomyopathy (HCM). METHODS A GEO dataset GSE32453 was analyzed to identify aberrantly expressed genes in HCM. Altered expression of IRX2 was induced in mice by lentivirus injection, followed by angiotensin II (Ang II) treatment to induce HCM. The function of IRX2 knockdown in ventricular dysfunction, heart volume and pathological changes in mice, and in surface area, oxidative stress and apoptosis of isolated cardiomyocytes were examined. Binding relationship between jumonji domain-containing protein 2A (JMJD2A) and IRX2 was predicted by online tools and validated. The interaction between JMJD2A and IRX2 in HCM development was examined by joint interventions. RESULTS IRX2 was highly expressed in heart tissues with HCM. IRX2 knockdown prevented mice from Ang II-induced ventricular dysfunction, cardiac hypertrophy, inflammation and fibrosis in mouse heart, and it decreased the levels of cardiac hypertrophy-related markers, oxidative stress response, and apoptosis of Ang II-treated cardiomyocytes. JMJD2A catalyzed demethylation of H3K9me3 near the IRX2 promoter to activate its transcription. JMJD2A knockdown similarly exerted protective functions against cardiac hypertrophy in vivo and in vitro, but the protection was blocked upon further IRX2 upregulation. IRX2 was found to increase the Wnt/β-catenin signaling activation. CONCLUSION This work reports that JMJD2A activates IRX2 transcription and the Wnt/β-catenin signaling to induce cardiac hypertrophy and dysfunction in HCM.
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Affiliation(s)
- Kaihao Wang
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China
| | - Min Zhou
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China
| | - Youhong Zhang
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China
| | - Yipeng Du
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China
| | - Peixin Li
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China
| | - Chang Guan
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China
| | - Zheng Huang
- Department of Cardiology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510000, Guangdong, PR China.
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Ni B, Sun M, Zhao J, Wang J, Cao Z. The role of β-catenin in cardiac diseases. Front Pharmacol 2023; 14:1157043. [PMID: 37033656 PMCID: PMC10073558 DOI: 10.3389/fphar.2023.1157043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 03/13/2023] [Indexed: 04/11/2023] Open
Abstract
The Wnt/β-catenin signaling pathway is a classical Wnt pathway that regulates the stability and nuclear localization of β-catenin and plays an important role in adult heart development and cardiac tissue homeostasis. In recent years, an increasing number of researchers have implicated the dysregulation of this signaling pathway in a variety of cardiac diseases, such as myocardial infarction, arrhythmias, arrhythmogenic cardiomyopathy, diabetic cardiomyopathies, and myocardial hypertrophy. The morbidity and mortality of cardiac diseases are increasing, which brings great challenges to clinical treatment and seriously affects patient health. Thus, understanding the biological roles of the Wnt/β-catenin pathway in these diseases may be essential for cardiac disease treatment and diagnosis to improve patient quality of life. In this review, we summarize current research on the roles of β-catenin in human cardiac diseases and potential inhibitors of Wnt/β-catenin, which may provide new strategies for cardiac disease therapies.
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7
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Bacova BS, Andelova K, Sykora M, Egan Benova T, Barancik M, Kurahara LH, Tribulova N. Does Myocardial Atrophy Represent Anti-Arrhythmic Phenotype? Biomedicines 2022; 10:2819. [PMID: 36359339 PMCID: PMC9687767 DOI: 10.3390/biomedicines10112819] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 11/30/2023] Open
Abstract
This review focuses on cardiac atrophy resulting from mechanical or metabolic unloading due to various conditions, describing some mechanisms and discussing possible strategies or interventions to prevent, attenuate or reverse myocardial atrophy. An improved awareness of these conditions and an increased focus on the identification of mechanisms and therapeutic targets may facilitate the development of the effective treatment or reversion for cardiac atrophy. It appears that a decrement in the left ventricular mass itself may be the central component in cardiac deconditioning, which avoids the occurrence of life-threatening arrhythmias. The depressed myocardial contractility of atrophied myocardium along with the upregulation of electrical coupling protein, connexin43, the maintenance of its topology, and enhanced PKCƐ signalling may be involved in the anti-arrhythmic phenotype. Meanwhile, persistent myocardial atrophy accompanied by oxidative stress and inflammation, as well as extracellular matrix fibrosis, may lead to severe cardiac dysfunction, and heart failure. Data in the literature suggest that the prevention of heart failure via the attenuation or reversion of myocardial atrophy is possible, although this requires further research.
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Affiliation(s)
| | - Katarina Andelova
- Centre of Experimental Medicine, Slovak Academy of Sciences, 84104 Bratislava, Slovakia
| | - Matus Sykora
- Centre of Experimental Medicine, Slovak Academy of Sciences, 84104 Bratislava, Slovakia
| | - Tamara Egan Benova
- Centre of Experimental Medicine, Slovak Academy of Sciences, 84104 Bratislava, Slovakia
| | - Miroslav Barancik
- Centre of Experimental Medicine, Slovak Academy of Sciences, 84104 Bratislava, Slovakia
| | - Lin Hai Kurahara
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Miki-cho 761-0793, Japan
| | - Narcis Tribulova
- Centre of Experimental Medicine, Slovak Academy of Sciences, 84104 Bratislava, Slovakia
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8
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da Purificação NRC, Garcia VB, Frez FCV, Sehaber CC, Lima KRDA, de Oliveira Lima MF, de Carvalho Vasconcelos R, de Araujo AA, de Araújo Júnior RF, Lacchini S, de Oliveira F, Perles JVCM, Zanoni JN, de Sousa Lopes MLD, Clebis NK. Combined use of systemic quercetin, glutamine and alpha-tocopherol attenuates myocardial fibrosis in diabetic rats. Biomed Pharmacother 2022; 151:113131. [PMID: 35643067 DOI: 10.1016/j.biopha.2022.113131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 11/02/2022] Open
Abstract
This study aimed to analyze the effects of the quercetin (100 mg/kg), 1% glutamine and 1% α-tocopherol antioxidants in the myocardium of rats with streptozotocin-induced diabetes mellitus. Twenty male rats were subdivided into four groups (n = 5): N (normoglycemic); D (diabetic); NT (normoglycemic treated with antioxidants); and DT (diabetic treated with antioxidants) treated for 60 days. Clinical parameters, oxidative stress markers, inflammatory cytokines, myocardial collagen fibers and immunoexpression of superoxide dismutase 1 (SOD-1), glutathione peroxidase-1 (GPx-1), interleukin-1β (IL-1-β), transforming growth factor-beta (TGF-β), and fibroblast growth factor-2 (FGF-2) were evaluated. Results showed reduced body weight, hyperphagia, polydipsia and hyperglycemic state in groups D and DT. The levels of glutathione (GSH) were higher in NT and DT compared to N (p < 0.01) and D (p < 0.001) groups, respectively. Greater GSH levels were found in DT when compared to N animals (p < 0.001). In DT, there was an increase in IL-10 in relation to N, D and NT (p < 0.05), while GPx-1 expression was similar to N and lower compared to D (p < 0.001). TGF-β expression in DT was greater than N (p < 0.001) group, whereas FGF-2 in DT was higher than in the other groups (p < 0.001). A significant reduction in collagen fibers (type I) was found in DT compared to D (p < 0.05). The associated administration of quercetin, glutamine and α-tocopherol increased the levels of circulating interleukin-10 (IL-10) and GSH, and reduced the number of type I collagen fibers. Combined use of systemic quercetin, glutamine and alpha-tocopherol attenuates myocardial fibrosis in diabetic rats.
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Affiliation(s)
| | | | | | | | - Kaio Ramon De Aguiar Lima
- Postgraduate Program in Functional & Structural Biology, Departament of Morphology, UFRN, Natal, RN, Brazil
| | | | | | - Aurigena Antunes de Araujo
- Postgraduate Program in Pharmaceutical Sciences, Postgraduate Program in Dental Sciences, Department of Pharmacology and Biophysical, UFRN, Natal, RN, Brazil.
| | - Raimundo Fernandes de Araújo Júnior
- Postgraduate Program in Health Sciences, Postgraduate Program in Functional & Structural Biology, Departament of Morphology, UFRN, Natal, RN, Brazil
| | - Silvia Lacchini
- Postgraduate Program in Morphology Science, Departamento of Anatomy, São Paulo University, São Paulo, SP, Brazil
| | - Flávia de Oliveira
- Departament of Biocience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | | | | | | | - Naianne Kelly Clebis
- Postgraduate Program in Functional & Structural Biology, Departament of Morphology, UFRN, Natal, RN, Brazil
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Chen X, Li Y, Yuan X, Yuan W, Li C, Zeng Y, Lian Y, Qiu X, Qin Y, Zhang G, Liu X, Luo C, Luo JD, Hou N. Methazolamide Attenuates the Development of Diabetic Cardiomyopathy by Promoting β-Catenin Degradation in Type 1 Diabetic Mice. Diabetes 2022; 71:795-811. [PMID: 35043173 DOI: 10.2337/db21-0506] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 12/21/2021] [Indexed: 11/13/2022]
Abstract
Methazolamide (MTZ), a carbonic anhydrase inhibitor, has been shown to inhibit cardiomyocyte hypertrophy and exert a hypoglycemic effect in patients with type 2 diabetes and diabetic db/db mice. However, whether MTZ has a cardioprotective effect in the setting of diabetic cardiomyopathy is not clear. We investigated the effects of MTZ in a mouse model of streptozotocin-induced type 1 diabetes mellitus (T1DM). Diabetic mice received MTZ by intragastric gavage (10, 25, or 50 mg/kg, daily for 16 weeks). In the diabetic group, MTZ significantly reduced both random and fasting blood glucose levels and improved glucose tolerance in a dose-dependent manner. MTZ ameliorated T1DM-induced changes in cardiac morphology and dysfunction. Mechanistic analysis revealed that MTZ blunted T1DM-induced enhanced expression of β-catenin. Similar results were observed in neonatal rat cardiomyocytes (NRCMs) and adult mouse cardiomyocytes treated with high glucose or Wnt3a (a β-catenin activator). There was no significant change in β-catenin mRNA levels in cardiac tissues or NRCMs. MTZ-mediated β-catenin downregulation was recovered by MG132, a proteasome inhibitor. Immunoprecipitation and immunofluorescence analyses showed augmentation of AXIN1-β-catenin interaction by MTZ in T1DM hearts and in NRCMs treated with Wnt3a; thus, MTZ may potentiate AXIN1-β-catenin linkage to increase β-catenin degradation. Overall, MTZ may alleviate cardiac hypertrophy by mediating AXIN1-β-catenin interaction to promote degradation and inhibition of β-catenin activity. These findings may help inform novel therapeutic strategy to prevent heart failure in patients with diabetes.
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Affiliation(s)
- Xiaoqing Chen
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Yilang Li
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Xun Yuan
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Wenchang Yuan
- Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, KingMed School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Conglin Li
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Yue Zeng
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Yuling Lian
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Xiaoxia Qiu
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
- Zhujiang Hospital of Southern Medical University, Guangzhou, People's Republic of China
| | - Yuan Qin
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Guiping Zhang
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Xiawen Liu
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Chengfeng Luo
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Jian-Dong Luo
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
| | - Ning Hou
- Key Laboratory of Molecular Target and Clinical Pharmacology and the State and NMPA Key Laboratory, School of Pharmaceutical Sciences and The Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
- Guangzhou Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, People's Republic of China
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10
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Zheng H, Zhu H, Liu X, Huang X, Huang A, Huang Y. Mitophagy in Diabetic Cardiomyopathy: Roles and Mechanisms. Front Cell Dev Biol 2021; 9:750382. [PMID: 34646830 PMCID: PMC8503602 DOI: 10.3389/fcell.2021.750382] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 09/06/2021] [Indexed: 12/20/2022] Open
Abstract
Cardiovascular disease is the leading complication of diabetes mellitus (DM), and diabetic cardiomyopathy (DCM) is a major cause of mortality in diabetic patients. Multiple pathophysiologic mechanisms, including myocardial insulin resistance, oxidative stress and inflammation, are involved in the development of DCM. Recent studies have shown that mitochondrial dysfunction makes a substantial contribution to the development of DCM. Mitophagy is a type of autophagy that takes place in dysfunctional mitochondria, and it plays a key role in mitochondrial quality control. Although the precise molecular mechanisms of mitophagy in DCM have yet to be fully clarified, recent findings imply that mitophagy improves cardiac function in the diabetic heart. However, excessive mitophagy may exacerbate myocardial damage in patients with DCM. In this review, we aim to provide a comprehensive overview of mitochondrial quality control and the dual roles of mitophagy in DCM. We also propose that a balance between mitochondrial biogenesis and mitophagy is essential for the maintenance of cellular metabolism in the diabetic heart.
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Affiliation(s)
- Haoxiao Zheng
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, China
| | - Hailan Zhu
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, China
| | - Xinyue Liu
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, China
| | - Xiaohui Huang
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, China
| | - Anqing Huang
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, China
| | - Yuli Huang
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, China.,Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou, China.,The George Institute for Global Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
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11
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Haas Bueno R, Recamonde-Mendoza M. Meta-analysis of Transcriptomic Data Reveals Pathophysiological Modules Involved with Atrial Fibrillation. Mol Diagn Ther 2020; 24:737-751. [PMID: 33095430 DOI: 10.1007/s40291-020-00497-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/30/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Atrial fibrillation (AF) is a complex disease and affects millions of people around the world. The biological mechanisms that are involved with AF are complex and still need to be fully elucidated. Therefore, we performed a meta-analysis of transcriptome data related to AF to explore these mechanisms aiming at more sensitive and reliable results. METHODS Ten public transcriptomic datasets were downloaded, analyzed for quality control, and individually pre-processed. Differential expression analysis was carried out for each dataset, and the results were meta-analytically aggregated using the rth ordered p value method. We analyzed the final list of differentially expressed genes through network analysis, namely topological and modularity analysis, and functional enrichment analysis. RESULTS The meta-analysis of transcriptomes resulted in 1197 differentially expressed genes, whose protein-protein interaction network presented 39 hubs-bottlenecks and four main identified functional modules. These modules were enriched for 39, 20, 64, and 10 biological pathways involved with the pathophysiology of AF, especially with the disease's structural and electrical remodeling processes. The stress of the endoplasmic reticulum, protein catabolism, oxidative stress, and inflammation are some of the enriched processes. Among hub-bottlenecks genes, which are highly connected and probably have a key role in regulating these processes, HSPA5, ANK2, CTNNB1, and MAPK1 were identified. CONCLUSION Our approach based on transcriptome meta-analysis revealed a set of key genes that demonstrated consistent overall changes in expression patterns associated with AF despite data heterogeneity related, among others, to type of tissue. Further experimental investigation of our findings may shed light on the pathophysiology of the disease and contribute to the identification of new therapeutic targets.
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Affiliation(s)
- Rodrigo Haas Bueno
- Experimental and Molecular Cardiovascular Laboratory, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
- Bioinformatics Core, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
| | - Mariana Recamonde-Mendoza
- Experimental and Molecular Cardiovascular Laboratory, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil.
- Bioinformatics Core, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil.
- Institute of Informatics, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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12
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Abstract
FGF21 (fibroblast growth factor 21) is a regulator of metabolism and performs an important role in glucose and lipid metabolism and the maintenance of energy balance. FGF21 is principally expressed in the liver, but it can also be found in the pancreas, skeletal muscle, and adipose tissue. It is known that levels of serum FGF21 are significantly elevated in obese, insulin-resistant patients, and those with metabolic syndrome. Elevated levels of FGF21 in serum during the early stages of various metabolic diseases are considered a compensatory response by the organism. Therefore, FGF21 is considered a hormone in response to stress and an early diagnostic marker of disease. Diabetic cardiomyopathy is a special type of cardiac complication, characterized as a chronic myocardial disorder caused by diabetes. The pathological process includes increased oxidative stress, energy metabolism in myocardial cells, an inflammatory response, and myocardial cell apoptosis. A growing body of evidence suggests that FGF21 has the potential to be an effective drug for the treatment of diabetic cardiomyopathy. Here, we review recent progress on the characteristics of FGF21 in its protective role, especially in pathological processes such as suppressing apoptosis in the myocardium, reducing inflammation in cardiomyocytes, reducing oxidative stress, and promoting fatty acid oxidation. In addition, we explore the possibility that diabetic cardiomyopathy can be delayed through the application of FGF21, providing possible therapeutic targets of the disease.
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Affiliation(s)
- Xiang Zhang
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China
| | - Luo Yang
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China
| | - Xiongfeng Xu
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China
| | - Fengjuan Tang
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China
| | - Peng Yi
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China
| | - Bo Qiu
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China
| | - Yarong Hao
- Department of Geriatrics, Renming Hospital of Wuhan University, Hubei, People's Republic of China.
- Central Laboratory, Renming Hospital of Wuhan University, Hubei, People's Republic of China.
- Division of Metabolic Syndrome, Department of Geriatrics, Renming Hospital of Wuhan University, 99 Zhang Zhidong Road, Wuchang District, Wuhan, 430060, Hubei, China.
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13
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Resham K, Khare P, Bishnoi M, Sharma SS. Neuroprotective effects of isoquercitrin in diabetic neuropathy via Wnt/β-catenin signaling pathway inhibition. Biofactors 2020; 46:411-420. [PMID: 31960520 DOI: 10.1002/biof.1615] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 11/28/2019] [Indexed: 12/12/2022]
Abstract
Diabetic neuropathy is a peripheral nervous system disorder affecting both somatic and autonomic components of nervous system. A growing body of evidence have depicted that high glucose levels can induce activation of the Wnt/β-catenin pathway, however there are no studies targeting this pathway in DN. The intent of the present study was to investigate the effects of isoquercitrin (ISQ), a Wnt/β-catenin signaling pathway inhibitor, in diabetic neuropathy. Streptozotocin (50 mg/kg, i.p.) was used to induce diabetes in rats. 6-week diabetic rats were treated intrathecally with ISQ at 10 and 30 μM doses for 3 days. Furthermore, to confirm the results of the intrathecal study, a 2-week intraperitoneal treatment of ISQ was given to diabetic rats. After 6 weeks, diabetic rats developed neuropathy which was evident from reduced thermal and mechanical hyperalgesia thresholds and significant deterioration in motor nerve conduction velocity (MNCV), nerve blood flow (NBF). Sciatic nerves of diabetic neuropathy rats showed increased expression of Wnt pathway proteins namely β-catenin, c-myc and MMP2. Treatment with ISQ, both intrathecally (10 and 30 μM) and intraperitoneally (10 mg/kg), significantly ameliorated the alterations in behavioral pain thresholds and improved functional parameters in diabetic rats. Moreover, ISQ also downregulated the expression of Wnt/β-catenin pathway proteins significantly in diabetic rats as compared to vehicle-treated diabetic rats. Results of the present study suggest the neuroprotective potential of ISQ in the treatment of DN via inhibition of Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Kahkashan Resham
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research, Punjab, India
| | - Pragyanshu Khare
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute, Punjab, India
| | - Mahendra Bishnoi
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute, Punjab, India
| | - Shyam S Sharma
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research, Punjab, India
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14
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Wang Z, Fu M, Li Y. miR-142-5p and miR-212-5p cooperatively inhibit the proliferation and collagen formation of cardiac fibroblasts by regulating c-Myc/TP53INP1. Can J Physiol Pharmacol 2020; 98:314-323. [PMID: 32268073 DOI: 10.1139/cjpp-2019-0495] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The aim of this study was to investigate the effect and mechanism of miR-142-5p/212-5p on the proliferation and collagen formation of cardiac fibroblasts (CFs) after myocardial infarction (MI). The mouse MI model was established by ligation of the left anterior descending coronary artery. CFs were induced by transforming growth factor-beta 1 (TGF-β1) or angiotensin (Ang II). The molecule expressions were measured by qRT-PCR and Western blot. CF proliferation was detected by an MTT assay. The effect of miR-142-5p/212-5p on the luciferase activity of c-Myc 3′UTR was assessed by the luciferase reporter assay. miR-142-5p and miR-212-5p were downregulated in cardiac tissues of MI mice and in TGF-β1- or Ang II-induced CFs, while the protein levels of collagen I and III were upregulated. Moreover, simultaneous overexpression of miR-142-5p/212-5p inhibited the proliferation and collagen formation of TGF-β1- or Ang II-stimulated CFs to a greater extent than either miR-142-5p or miR-212-5p overexpression alone. MiR-142-5p/212-5p targeted c-Myc and negatively regulated its expression. The effects of miR-142-5p/212-5p overexpression on the TP53INP1 protein level and the proliferation and collagen formation of CFs were reversed by c-Myc overexpression. Moreover, overexpression of miR-142-5p/212-5p improved cardiac function and collagen formation of MI mice. Overexpression of miR-142-5p/212-5p cooperatively suppresses the proliferation and collagen formation after MI by regulating c-Myc/TP53INP1.
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Affiliation(s)
- Zhiqian Wang
- Department of Geriatric Orthopaedics, The Third Hospital of Hebei Medical University, Shijiazhuang; 050000, Hebei Province, China
| | - Mingming Fu
- Department of Geriatric Orthopaedics, The Third Hospital of Hebei Medical University, Shijiazhuang; 050000, Hebei Province, China
| | - Yongjun Li
- Department of Cardiology, The Second Hospital of Hebei Medical University, Shijiazhuang; 050000, Hebei Province, China
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15
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Li Y, Wang J, Li Z, Cheng H, Zhang Z, Luo T, Zhang X, Gao G, Lu H, Li L. Propoxyphene Mediates Oxyhemoglobin-Induced Injury in Rat Cortical Neurons Through Up-Regulation of Active-β-Catenin. Front Pharmacol 2020; 10:1616. [PMID: 32082150 PMCID: PMC7003133 DOI: 10.3389/fphar.2019.01616] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 12/11/2019] [Indexed: 12/17/2022] Open
Abstract
Wnt/β-catenin signaling is involved in various biological processes, including the development of the central nervous system. The dysfunction of mitochondria has been shown to participate in the progress of subarachnoid hemorrhage (SAH). Traumatic subarachnoid hemorrhage (tSAH) is a serious complication in acute craniocerebral trauma. Opioids can activate the canonical Wnt/β-catenin signaling pathway. c-Myc, a downstream protein of Wnt/β-catenin signaling, contributes to the fusion of mitochondria. Here, we investigated the protective roles of Propoxyphene (Pro) against Oxyhemoglobin (OxyHb)-induced primary cultured neuron apoptosis. The data indicated that Pro rescued active-β-catenin from OxyHb-induced decline. Furthermore, Pro attenuated OxyHb-induced apoptosis and fission of mitochondria in primary cortical neurons. However, the protective effects were abrogated under active-β-catenin-deficient conditions. Together, the data presented here showed that Pro, a weak opioid analgesic drug, attenuates OxyHb-induced mitochondria-dependent apoptosis in an active-β-catenin-c-Myc-dependent manner.
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Affiliation(s)
- Yuqian Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Jiancai Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Zhihong Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Hongyu Cheng
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Zhuo Zhang
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Tao Luo
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Xingye Zhang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Guodong Gao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Huashan Lu
- Department of Emergency, 96605 Military Hospital, Tonghua, China
| | - Lihong Li
- Department of Emergency, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
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16
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Hydrogen Sulfide Attenuates High Glucose-induced Myocardial Injury in Rat Cardiomyocytes by Suppressing Wnt/beta-catenin Pathway. Curr Med Sci 2019; 39:938-946. [PMID: 31845225 DOI: 10.1007/s11596-019-2120-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 11/08/2019] [Indexed: 12/12/2022]
Abstract
Diabetic cardiomyopathy (DCM) is one of the major heart complications of diabetic patients. Hydrogen sulfide (H2S) is now recognized as an important signaling molecule and has been shown to attenuate the development of diabetic cardiomyopathy. However, the underlying mechanisms linking H2S and the development of DCM have not been fully elucidated. In the present study, we therefore sought to explore the role and mechanism of H2S in the pathogenesis of DCM by establishing high glucose-induced injury model in neonatal rat cardiomyocytes (NRCMs) and H9c2 cells. Using cystathionine gamma-lyase (CSE) overexpression and CSE interference vectors transfection, the cell viability, cell apoptosis. and oxidative stress were determined and compared between the treatment of high glucose induction and exgenous NaHS administration. Meanwhile, the relationship between the CSE/H2S system and Wnt/beta-catenin pathway was analyzed and discussed in the high glucose-induced cardiomyocytes. Our results indicated that H2S played an important protective role in high glucose-induced apoptosis and oxidative stress in cardiomyocytes, as shown by the decreased reactive oxygen species and malondialdehyde levels, and the increased activities of superoxide dismutase, catalase and glutathione peroxidase. Moreover, H2S could attenuate the Wnt/β-catenin signalling pathway and up-regulate the expression of haem oxygenase-1 (HO-1) and NAD(P)H:quinone oxidoreductase 1 (NQO1) in the diabetic myocardium cells. Together, these results demonstrated that H2S could attenuate high glucose-induced myocardial injury in rat cardiomyocytes by suppressing Wnt/β-catenin pathway.
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17
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Isoflurane preconditioning protects hepatocytes from oxygen glucose deprivation injury by regulating FoxO6. J Biosci 2019. [DOI: 10.1007/s12038-019-9967-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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C-myc contributes to the release of Müller cells-derived proinflammatory cytokines by regulating lncRNA MIAT/XNIP pathway. Int J Biochem Cell Biol 2019; 114:105574. [DOI: 10.1016/j.biocel.2019.105574] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 07/12/2019] [Accepted: 07/19/2019] [Indexed: 02/07/2023]
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19
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Resham K, Sharma SS. Pharmacologic Inhibition of Porcupine, Disheveled, and β-Catenin in Wnt Signaling Pathway Ameliorates Diabetic Peripheral Neuropathy in Rats. THE JOURNAL OF PAIN 2019; 20:1338-1352. [PMID: 31075529 DOI: 10.1016/j.jpain.2019.04.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/22/2019] [Accepted: 03/15/2019] [Indexed: 12/23/2022]
Abstract
Wnt signaling pathway has been investigated extensively for its diverse metabolic and pain-modulating mechanisms; recently its involvement has been postulated in the development of neuropathic pain. However, there are no reports as yet on the involvement of Wnt signaling pathway in one of the most debilitating neurovascular complication of diabetes, namely, diabetic peripheral neuropathy (DPN). Thus, in the present study, involvement of Wnt signaling was investigated in DPN using Wnt signaling inhibitors namely LGK974 (porcupine inhibitor), NSC668036 (disheveled inhibitor), and PNU74654 (β-catenin inhibitor). Diabetes was induced by a single intraperitoneal injection of streptozotocin (50 mg/kg) to male Sprague-Dawley rats. Diabetic rats after 6 weeks of diabetes induction showed increased expression of Wnt signaling proteins in the spinal cord (L4-L6 lumbar segment), dorsal root ganglions and sciatic nerves. Subsequent increase in inflammation, endoplasmic reticulum stress and loss of intraepidermal nerve fiber density was also observed, leading to neurobehavioral and nerve functional deficits in diabetic rats. Intrathecal administration of Wnt signaling inhibitors (each at doses of 10 and 30 µmol/L) in diabetic rats showed improvement in pain-associated behaviors (heat, cold, and mechanical hyperalgesia) and nerve functions (motor, sensory nerve conduction velocities, and nerve blood flow) by decreasing the expression of Wnt pathway proteins, inflammatory marker, matrix metalloproteinase 2, endoplasmic reticulum stress marker, glucose-regulated protein 78, and improving intraepidermal nerve fiber density. All these results signify the neuroprotective potential of Wnt signaling inhibitors in DPN. PERSPECTIVE: This study emphasizes the involvement of Wnt signaling pathway in DPN. Blockade of this pathway using Wnt inhibitors provided neuroprotection in experimental DPN in rats. This study may provide a basis for exploring the therapeutic potential of Wnt inhibitors in DPN patients.
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Affiliation(s)
- Kahkashan Resham
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab, India
| | - Shyam S Sharma
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, Punjab, India.
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20
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Conditional Haploinsufficiency of β-Catenin Aggravates Neuronal Damage in a Paraquat-Based Mouse Model of Parkinson Disease. Mol Neurobiol 2018; 56:5157-5166. [PMID: 30519817 DOI: 10.1007/s12035-018-1431-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 11/13/2018] [Indexed: 10/27/2022]
Abstract
The canonical Wnt pathway is critical for both the development and adulthood survival and homeostatic maintenance of the midbrain dopaminergic (DA) neurons. Expanding evidence has demonstrated that genetic factors associated with familial Parkinson disease (PD) deregulate this important pathway, suggesting that a disturbed canonical Wnt pathway is likely involved in PD pathogenesis; yet, the specific role of this pathway in sporadic PD remains unclear. In this study, we aimed to determine the effects of specific inhibition of the canonical pathway by hemizygous knockout of β-catenin, the obligatory component of the canonical Wnt pathway, on paraquat (PQ)-induced DA neuronal degeneration in the substantia nigra in vivo. We found that while hemizygous conditional knockout of β-catenin in DA neurons did not cause any significant TH+ neuronal loss in the substantia nigra at basal level, it triggered elevated oxidative stress at basal level and further enhanced PQ-induced oxidative damage and loss of TH+ neurons in the substantia nigra and axonal termini in the striatum that manifested as exacerbated motor deficits. These data support the notion that reduced Wnt/β-catenin signaling in sporadic PD likely contributes to DA neuronal loss through an enhanced oxidative stress-response pathway.
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21
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Liu Y, Zheng W, Pan Y, Hu J. Low expression of miR-186-5p regulates cell apoptosis by targeting toll-like receptor 3 in high glucose-induced cardiomyocytes. J Cell Biochem 2018; 120:9532-9538. [PMID: 30506923 DOI: 10.1002/jcb.28229] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 11/15/2018] [Indexed: 12/20/2022]
Abstract
To investigate the effect and mechanism of microRNA-186-5p (miR-186-5p) on the apoptosis in high glucose (HG)-treated cardiomyocytes. Diabetic cardiomyopathy model was established in cardiomyocytes by stimulating with HG. The expressions of miR-186-5p and toll-like receptor 3 (TLR3) were detected by quantitative polymerase chain reaction or Western blot analysis, respectively. Apoptosis was detected in HG-treated cardiomyocytes by flow cytometry and Western blot analysis. The interaction between miR-186-5p and TLR3 was explored by bioinformatics analysis and luciferase activity assay. Results showed that miR-186-5p expression was downregulated in HG-treated cardiomyocytes and its overexpression reversed HG-induced apoptosis and cleaved caspase-3 protein expression. Moreover, TLR3 was indicated as a target of miR-186-5p and regulated by miR-186-5p. Knockdown of TLR3 suppressed HG-induced apoptosis and cleaved caspase-3 protein expression. Besides, restoration of TLR3 ablated the effect of miR-186-5p on cell apoptosis. Collectively, miR-186-5p attenuated HG-induced apoptosis by regulating TLR3 in cardiomyocytes, providing novel biomarker for treatment of diabetic cardiomyopathy.
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Affiliation(s)
- Ye Liu
- Electrocardial Center of the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Wei Zheng
- Electrocardial Center of the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Yue Pan
- Electrocardial Center of the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Jing Hu
- Electrocardial Center of the First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
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22
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Zhang J, Qiu H, Huang J, Ding S, Huang B, Wu Q, Jiang Q. Establishment of a diabetic myocardial hypertrophy model in Mus musculus castaneus mouse. Int J Exp Pathol 2018; 99:295-303. [PMID: 30614094 PMCID: PMC6384502 DOI: 10.1111/iep.12296] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 10/31/2018] [Accepted: 11/06/2018] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to establish a robust model of diabetic myocardial hypertrophy in Mus musculus castaneus mice. Mice were fed a high-fat diet for four weeks and then given streptozotocin (STZ, 40 mg kg-1 d-1 for 5 days, intraperitoneally) and fasting blood glucose (FBG) levels were tested after seven days. Mice with FBG levels above 11.1 mmol/L were considered diabetic. Diabetic mice continued to have access to the high-fat diet until cardiac hypertrophy developed. FBG and body weight (BW) were measured weekly. Myocardial hypertrophy was confirmed by left ventricle (LV) hypertrophy index (LVHI), LV/BW, LV histopathological observation and atrial natriuretic factor (ANF) mRNA expression. Serum insulin and plasma haemoglobin A1c (HbA1c) levels, total cholesterol (TCH) and triglyceride (TG) were measured, and then an insulin resistance index (HOMA.IR) was calculated. The level of FBG in the model group remained above 11.1 mmol/L, and the BW showed significant weight loss, compared with the control group (P < 0.01). The high levels of HbA1c, HOME.IR, TCH and TG, and the low level of insulin suggested that glucose metabolism was not balanced with insulin resistance; meanwhile, higher TCH and TG showed that dyslipidaemia had also developed. After the diabetic mice were kept on the high-energy diet for another four weeks, histopathological observation showed myocardial injuries, much more surface area and collagen fibres, higher LVHI and LV/BW, and elevated expression of ANF mRNA (P < 0.01), suggesting that myocardial hypertrophy had appeared in Mus musculus castaneus mice under the current experimental conditions. Thus a robust model of diabetic myocardial hypertrophy was established four weeks after confirmation of diabetes, which was induced by feeding a high-fat diet for four weeks combined with a repeated low-dose STZ exposure, in Mus musculus castaneus mice.
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Affiliation(s)
- Jie Zhang
- Department of PharmacologyChongqing Key Laboratory of Biochemistry and Molecular PharmacologyChongqing Medical UniversityChongqingChina
| | - Hongmei Qiu
- Department of PharmacologyChongqing Key Laboratory of Biochemistry and Molecular PharmacologyChongqing Medical UniversityChongqingChina
| | - Jiajun Huang
- Department of PharmacologyChongqing Key Laboratory of Biochemistry and Molecular PharmacologyChongqing Medical UniversityChongqingChina
| | - Shumei Ding
- Department of PharmacologyChongqing Key Laboratory of Biochemistry and Molecular PharmacologyChongqing Medical UniversityChongqingChina
| | - Bo Huang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityGuizhouChina
| | - Qin Wu
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityGuizhouChina
| | - Qingsong Jiang
- Department of PharmacologyChongqing Key Laboratory of Biochemistry and Molecular PharmacologyChongqing Medical UniversityChongqingChina
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23
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Zhao C, Shen Q. Overexpression of small ubiquitin‑like modifier 2 ameliorates high glucose‑induced reductions in cardiomyocyte proliferation via the transforming growth factor‑β/Smad pathway. Mol Med Rep 2018; 18:4877-4885. [PMID: 30280191 PMCID: PMC6236294 DOI: 10.3892/mmr.2018.9522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 12/12/2017] [Indexed: 12/16/2022] Open
Abstract
Hyperglycemia may induce diabetic cardiomyopathy (DC). In the current study, the mechanism underlying the alleviation of high glucose (HG)-induced impairments in the proliferation of H9c2 embryo cardiomyocyte proliferation by small ubiquitin-like modifier 2 (SUMO2) overexpression was investigated. H9c2 cell morphology was identified as classical long shuttle type by optical microscopy. The viability of HG-injured H9c2 cells was evaluated by a Cell Counting Kit-8 assay and the results indicated that viability was inhibited in a dose-dependent (5.6, 10, 20 and 30 mmol/l) and time-dependent (6, 12 and 24 h) manner. H9c2 cells treated with 20 mmol/l HG for 24 h were selected for subsequent experiments due to the extent of injury caused at a low density. Flow cytometry was conducted to confirm cell cycle arrest between G1/S phases and apoptosis promotion in HG-injured H9c2 cells, and the subsequent alleviating effect of SUMO2 overexpression on these HG-induced effects. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot analysis were performed to detect mRNA and protein expression levels of cell cycle-and apoptosis-associated factors. The results indicated that the expression ofthe cell cycle-associated factors CyclinA2 and C-Myc was upregulated, and cyclin-dependent kinase inhibitor 1a was downregulated. The expression of the apoptosis-associated factor Bcl-2 was upregulated, while Bcl-2-associated X and caspase-3 expression was downregulated, by SUMO2 overexpression. Furthermore, the effect of SUMO2 overexpression on the transforming growth factor (TGF)-β/Smad pathway was also determined using RT-qPCR and western blot analysis. The results indicated the mRNA and protein levels of TGF-β1 and Smad3 in HG-injured H9c2 cells were significantly decreased following SUMO2 overexpression. Thus, the results demonstrated that overexpression of SUMO2 may alleviate H9c2 cardiomyocyte cell cycle arrest and apoptosis promotion induced by HG via regulation of cell cycle- and apoptosis-associated factors, as well as inhibition of the TGF-β/Smad pathway. These results may therefore provide a novel strategy for the protection of cardiomyocytes and may aid the diagnosis and prognosis of patients with DC.
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Affiliation(s)
- Chen Zhao
- Department of Geriatric, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200336, P.R. China
| | - Qile Shen
- Department of Geriatric, Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200336, P.R. China
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24
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Zhang H, Tao M, Kang P, Guo J, Xuan L, Tang B, Gao Q, Wang H. [Changes of two-pore K+ channel TASK-1 in diabetic myocardial injury in rats]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2018; 38:1228-1233. [PMID: 30377119 DOI: 10.3969/j.issn.1673-4254.2018.10.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To investigate the changes of the two- pore K+ channel TASK-1 in diabetic rats with myocardial injury. METHODS Thirty-six SD rats were divided into normal group (N), diabetes at 4 weeks (DM 4W) group, and diabetes at 8 weeks (DM 8W) group. The cardiac functions of the rats were determined using cardiac ultrasonography, and the body weight and heart weight of the rats at different time points were measured to calculate the heart/body weight ratio (HW/BW). Myocardial fibrosis in the rats was assessed using Masson's staining. The protein expression of TASK-1 in the myocardium was detected using Western blotting. Whole- cell patch clamp technique was used to record the action potential duration (APD) and twopore domain potassium channel TASK- 1 current in acutely isolated rat ventricular myocytes. meanwhile, The inhibition of TASK-1 current was observed by the TASK-1 specific inhibitor ML-365. RESULTS Compared with the normal group, the diabetic rats showed significantly increased HW/BW (P < 0.05), end- diastole left ventricular diameter (LVIDd), end- systolic left ventricular diameter (LVIDs), and TASK-1 protein expression, with obviously decreased left ventricular diameter shortening rate (FS) and ejection fraction (EF) (P < 0.01). Masson staining showed that in diabetic rats, the collagen fibers were thickened, interwoven into a network with uneven arrangement and increased deposition. Compared with DM 4W group, the rats in DM 8W group exhibited progressive increases in LVIDd, LVIDs, HW/BW, and TASK-1 expression (P < 0.01 or 0.05); FS and EF were further decreased (P < 0.01). Masson staining showed worsened morphological changes of the myocardium with increased deposition. Compared with that in the normal group, the current of TASK- 1 in diabetic rats at 8 weeks was significantly reduced (P < 0.01) and the duration of action potential was extended (P < 0.05). The TASK-1 current was successfully inhibited by ML-365. CONCLUSIONS Diabetes can induce myocardial fibrosis and aggravate myocardial injury possibly in relation to changes in the protein expression and current of the two-port potassium channel TASK-1.
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Affiliation(s)
- Heng Zhang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Min Tao
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Pinfang Kang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Jianlu Guo
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Ling Xuan
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Bi Tang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Qin Gao
- Department of Physiology, Bengbu Medical College, Bengbu 233030, China
| | - Hongju Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
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宣 玲, 陈 斌, 郭 建, 康 品, 陶 敏, 高 琴, 唐 碧, 张 恒. [Effect of low-dose ethanol consumption on expression of nuclear factor-κB in diabetic rats with myocardial injury]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2018; 38:1255-1260. [PMID: 30377130 PMCID: PMC6744052 DOI: 10.3969/j.issn.1673-4254.2018.10.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To investigate the effect of low-dose ethanol on the expression of nuclear factor-κB (NF-κB) in diabetic rats with myocardial injury. METHODS Rat models of diabetes were established by an intraperitoneal injection of 55 mg/kg streptozotocin (STZ). After successful modeling, the rats were given 2.5% ethanol (daily dose of 20 mg/kg) for 1 week, followed by 5% ethanol (daily dose of 39.45 mg/kg) for another 7 weeks. Normal rats without STZ injection and diabetic rats without ethanol treatment serve as the normal control and diabetic model groups, respectively. The ventricular function of the rats was determined using echocardiography. The plasma levels of interleukin-1 (IL-1) and IL-4 were detected in the rats, and the expressions of 4-HNE, NF-κB and IKK proteins in the left anterior myocardium was evaluated using immunohistochemistry or Western blotting; the ultrastructural changes of the myocardium were observed using transmission electron microscopy. RESULTS Compared with the normal control group, the diabetic rats showed significantly lowered systolic and diastolic functions of the left ventricle, increased plasma level of IL-1 and myocardial 4-HNE expression (P < 0.01), decreased plasma level of plasma IL-4 (P < 0.01), and increased myocardial expressions of NF-κB and IKK proteins (P < 0.01). Transmission electron microscopy revealed myofibrillar rupture, incomplete myofibrillar structure and mitochondrial damage in the cardiac myocytes in the diabetic rats. Compared with the diabetic rats, the rats with low-dose ethanol treatment exhibited improved systolic and diastolic functions of the left ventricle, milder myocardial myofibrillar and mitochondrial damages, and significantly lowered plasma IL-1 level and myocardial expressions of 4-HNE, NF-κB and IKK (P < 0.01), and increased plasma IL-4 level (P < 0.01). CONCLUSIONS NF-κB expression is increased in the myocardium of diabetic rats with myocardial injury, and low-dose ethanol consumption lowers myocardial expression of NF-κB in diabetic rats, suggesting the involvement of NF-κB signaling pathway in the protective effect of low-dose ethanol against myocardial injury in diabetes mellitus.
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Affiliation(s)
- 玲 宣
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
| | - 斌 陈
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
| | - 建路 郭
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
| | - 品方 康
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
| | - 敏 陶
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
| | - 琴 高
- 蚌埠医学院生理学教研室,安徽 蚌埠 233000Department of Physiology, Bengbu Medical College, Bengbu 233000, China
| | - 碧 唐
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
| | - 恒 张
- 蚌埠医学院第一附属医院心血管内科,安徽 蚌埠 233000Department of Cardiovascular Medicine, First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu 233000, China
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Zhang P, Hua L, Hou H, Du X, He Z, Liu M, Hu X, Yan N. Sphingomyelin synthase 2 promotes H2O2-induced endothelial dysfunction by activating the Wnt/β-catenin signaling pathway. Int J Mol Med 2018; 42:3344-3354. [PMID: 30272329 PMCID: PMC6202097 DOI: 10.3892/ijmm.2018.3888] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 09/17/2018] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis (AS) is the primary cause of various cardiovascular and cerebrovascular diseases and has high morbidity and mortality rates. Oxidative stress-induced endothelial cells (ECs) dysfunction is the pathological basis of AS. In addition, sphingomyelin (SM) and the Wnt/β-catenin signaling pathway are considered to be closely associated with AS; however, the specific mechanism is not clear. Therefore, the present study investigated whether SM may induce ECs dysfunction through the Wnt/β-catenin signaling pathway. Firstly, a sphingomyelin synthase 2 (SMS2) overexpression cell model was constructed. It was identified that the expression of SMS2 was increased when ECs were treated with H2O2. In addition, these results demonstrated that SMS2 overexpression promoted apoptosis and macrophage adhesion of H2O2-induced ECs, thereby increasing the expression of β-catenin. Furthermore, SMS activity was inhibited with Dy105, combined with simultaneous treatment with LiCl or H2O2. This additionally confirmed that Dy105 significantly inhibited SMS activity and decreased the level of ECs dysfunction and β-catenin content; however, LiCl served a key role in activating the Wnt/β-catenin signaling pathway to promote ECs dysfunction. Collectively, these results suggested that SMS2 overexpression may promote ECs dysfunction by activating the Wnt/β-catenin signaling pathway, while Dy105 may inhibit the evolution of oxidative stress-induced dysfunction.
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Affiliation(s)
- Panpan Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Lingyue Hua
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Huan Hou
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xingyue Du
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Zhiqiang He
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Menghan Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xiaojuan Hu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Nianlong Yan
- Department of Biochemistry and Molecular Biology, School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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Cardiomyocyte-specific deletion of GSK-3β leads to cardiac dysfunction in a diet induced obesity model. Int J Cardiol 2018; 259:145-152. [PMID: 29398139 DOI: 10.1016/j.ijcard.2018.01.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/19/2017] [Accepted: 01/02/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND RATIONALE Obesity, an independent risk factor for the development of myocardial diseases is a growing healthcare problem worldwide. It's well established that GSK-3β is critical to cardiac pathophysiology. However, the role cardiomyocyte (CM) GSK-3β in diet-induced cardiac dysfunction is unknown. METHODS CM-specific GSK-3β knockout (CM-GSK-3β-KO) and littermate controls (WT) mice were fed either a control diet (CD) or high-fat diet (HFD) for 55weeks. Cardiac function was assessed by transthoracic echocardiography. RESULTS At baseline, body weights and cardiac function were comparable between the WT and CM-GSK-3β-KOs. However, HFD-fed CM-GSK-3β-KO mice developed severe cardiac dysfunction. Consistently, both heart weight/tibia length and lung weight/tibia length were significantly elevated in the HFD-fed CM-GSK-3β-KO mice. The impaired cardiac function and adverse ventricular remodeling in the CM-GSK-3β-KOs were independent of body weight or the lean/fat mass composition as HFD-fed CM-GSK-3β-KO and controls demonstrated comparable body weight and body masses. At the molecular level, on a CD, CM-GSK-3α compensated for the loss of CM-GSK-3β, as evident by significantly reduced GSK-3αs21 phosphorylation (activation) resulting in a preserved canonical β-catenin ubiquitination pathway and cardiac function. However, this protective compensatory mechanism is lost with HFD, leading to excessive accumulation of β-catenin in HFD-fed CM-GSK-3β-KO hearts, resulting in adverse ventricular remodeling and cardiac dysfunction. CONCLUSION In summary, these results suggest that cardiac GSK-3β is crucial to protect against obesity-induced adverse ventricular remodeling and cardiac dysfunction.
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Sikaria D, Tu YN, Fisler DA, Mauro JA, Blanck G. Identification of specific feed-forward apoptosis mechanisms and associated higher survival rates for low grade glioma and lung squamous cell carcinoma. J Cancer Res Clin Oncol 2018; 144:459-468. [PMID: 29305708 DOI: 10.1007/s00432-017-2569-1] [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: 09/06/2017] [Accepted: 12/27/2017] [Indexed: 01/10/2023]
Abstract
The mechanisms of cell proliferation due to the overexpression of certain transcription factors (TFs) have been well documented in the cancer setting. However, many of these same TFs have pro-apoptotic effects, particularly when expressed or activated at high levels, a process referred to as feed-forward apoptosis (FFA). To determine whether cancers could be stratified on the basis of specific FFA signatures, RNASeq data representing samples from the cancer genome atlas were analyzed, revealing that high expression of the pro-proliferative TFs, MYC and YY1, is associated with a favorable outcome in low-grade glioma (LGG) and lung squamous cell carcinoma (LUSC), respectively. Analysis of the RNASeq data also led to the identification of specific apoptosis-effector genes whose expression levels correlate with increased survival rates, for both LGG and LUSC. Although FFA has been demonstrated as a general effect in cancer, in this report, for the first time, results identify specific TFs and their responsive effector genes that distinguish subsets of cancer samples undergoing more or less of a FFA process in a way that is associated with distinct patient survival rates.
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Affiliation(s)
- Dhiraj Sikaria
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, USA
| | - Yaping N Tu
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, USA
| | - Diana A Fisler
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, USA
| | - James A Mauro
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, USA
| | - George Blanck
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, USA. .,Immunology Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA. .,, 12901 Bruce B. Downs. Bd. MDC7, Tampa, FL, 33612, USA.
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