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Zhang Y, Zhang J, Wang J, Chen H, Ouyang L, Wang Y. Targeting GRK2 and GRK5 for treating chronic degenerative diseases: Advances and future perspectives. Eur J Med Chem 2022; 243:114668. [DOI: 10.1016/j.ejmech.2022.114668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022]
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2
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Rex DAB, Suchitha GP, Palollathil A, Kanichery A, Prasad TSK, Dagamajalu S. The network map of urotensin-II mediated signaling pathway in physiological and pathological conditions. J Cell Commun Signal 2022; 16:601-608. [PMID: 35174439 PMCID: PMC9733756 DOI: 10.1007/s12079-022-00672-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 02/07/2022] [Indexed: 12/13/2022] Open
Abstract
Urotensin-II is a polypeptide ligand with neurohormone-like activity. It mediates downstream signaling pathways through G-protein-coupled receptor 14 (GPR14) also known as urotensin receptor (UTR). Urotensin-II is the most potent endogenous vasoconstrictor in mammals, promoting cardiovascular remodelling, cardiac fibrosis, and cardiomyocyte hypertrophy. It is also involved in other physiological and pathological activities, including neurosecretory effects, insulin resistance, atherosclerosis, kidney disease, and carcinogenic effects. Moreover, it is a notable player in the process of inflammatory injury, which leads to the development of inflammatory diseases. Urotensin-II/UTR expression stimulates the accumulation of monocytes and macrophages, which promote the adhesion molecules expression, chemokines activation and release of inflammatory cytokines at inflammatory injury sites. Therefore, urotensin-II turns out to be an important therapeutic target for the treatment options and management of associated diseases. The main downstream signaling pathways mediated through this urotensin-II /UTR system are RhoA/ROCK, MAPKs and PI3K/AKT. Due to the importance of urotensin-II systems in biomedicine, we consolidated a network map of urotensin-II /UTR signaling. The described signaling map comprises 33 activation/inhibition events, 31 catalysis events, 15 molecular associations, 40 gene regulation events, 60 types of protein expression, and 11 protein translocation events. The urotensin-II signaling pathway map is made freely accessible through the WikiPathways Database ( https://www.wikipathways.org/index.php/Pathway:WP5158 ). The availability of comprehensive urotensin-II signaling in the public resource will help understand the regulation and function of this pathway in normal and pathological conditions. We believe this resource will provide a platform to the scientific community in facilitating the identification of novel therapeutic drug targets for diseases associated with urotensin-II signaling.
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Affiliation(s)
- D. A. B. Rex
- grid.413027.30000 0004 1767 7704Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed To Be University), Mangalore, 575018 India
| | - G. P. Suchitha
- grid.413027.30000 0004 1767 7704Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed To Be University), Mangalore, 575018 India
| | - Akhina Palollathil
- grid.413027.30000 0004 1767 7704Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed To Be University), Mangalore, 575018 India
| | - Anagha Kanichery
- grid.413027.30000 0004 1767 7704Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed To Be University), Mangalore, 575018 India
| | - T. S. Keshava Prasad
- grid.413027.30000 0004 1767 7704Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed To Be University), Mangalore, 575018 India
| | - Shobha Dagamajalu
- grid.413027.30000 0004 1767 7704Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed To Be University), Mangalore, 575018 India
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Zhao P, Malik S. The phosphorylation to acetylation/methylation cascade in transcriptional regulation: how kinases regulate transcriptional activities of DNA/histone-modifying enzymes. Cell Biosci 2022; 12:83. [PMID: 35659740 PMCID: PMC9164400 DOI: 10.1186/s13578-022-00821-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 05/27/2022] [Indexed: 11/30/2022] Open
Abstract
Transcription factors directly regulate gene expression by recognizing and binding to specific DNA sequences, involving the dynamic alterations of chromatin structure and the formation of a complex with different kinds of cofactors, like DNA/histone modifying-enzymes, chromatin remodeling factors, and cell cycle factors. Despite the significance of transcription factors, it remains unclear to determine how these cofactors are regulated to cooperate with transcription factors, especially DNA/histone modifying-enzymes. It has been known that DNA/histone modifying-enzymes are regulated by post-translational modifications. And the most common and important modification is phosphorylation. Even though various DNA/histone modifying-enzymes have been classified and partly explained how phosphorylated sites of these enzymes function characteristically in recent studies. It still needs to find out the relationship between phosphorylation of these enzymes and the diseases-associated transcriptional regulation. Here this review describes how phosphorylation affects the transcription activity of these enzymes and other functions, including protein stability, subcellular localization, binding to chromatin, and interaction with other proteins.
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Alicic D, Martinovic D, Rusic D, Zivkovic PM, Tadin Hadjina I, Vilovic M, Kumric M, Tokic D, Supe-Domic D, Lupi-Ferandin S, Bozic J. Urotensin II levels in patients with inflammatory bowel disease. World J Gastroenterol 2021; 27:6142-6153. [PMID: 34629825 PMCID: PMC8476337 DOI: 10.3748/wjg.v27.i36.6142] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/21/2021] [Accepted: 08/19/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Patients with inflammatory bowel disease (IBD) are associated with increased cardiovascular risk and have increased overall cardiovascular burden. On the other hand, urotensin II (UII) is one of the most potent vascular constrictors with immunomodulatory effect that is connected with a number of different cardiometabolic disorders as well. Furthermore, patients with ulcerative colitis have shown increased expression of urotensin II receptor in comparison to healthy controls. Since the features of IBD includes chronic inflammation and endothelial dysfunction as well, it is plausible to assume that there is connection between increased cardiac risk in IBD and UII.
AIM To determine serum UII levels in patients with IBD and to compare them to control subjects, as well as investigate possible associations with relevant clinical and biochemical parameters.
METHODS This cross sectional study consecutively enrolled 50 adult IBD patients (26 with Crohn’s disease and 24 with ulcerative colitis) and 50 age and gender matched controls. Clinical assessment was performed by the same experienced gastroenterologist according to the latest guidelines. Ulcerative Colitis Endoscopic Index of Severity and Simple Endoscopic Score for Crohn’s Disease were used for endoscopic evaluation. Serum levels of UII were determined using the enzyme immunoassay kit for human UII, according to the manufacturer’s instructions.
RESULTS IBD patients have significantly higher concentrations of UII when compared to control subjects (7.57 ± 1.41 vs 1.98 ± 0.69 ng/mL, P < 0.001), while there were no significant differences between Crohn’s disease and ulcerative colitis patients (7.49 ± 1.42 vs 7.65 ± 1.41 ng/mL, P = 0.689). There was a significant positive correlation between serum UII levels and high sensitivity C reactive peptide levels (r = 0.491, P < 0.001) and a significant negative correlation between serum UII levels and total proteins (r = -0.306, P = 0.032). Additionally, there was a significant positive correlation between serum UII levels with both systolic (r = 0.387, P = 0.005) and diastolic (r = 0.352, P = 0.012) blood pressure. Moreover, serum UII levels had a significant positive correlation with Ulcerative Colitis Endoscopic Index of Severity (r = 0.425, P = 0.048) and Simple Endoscopic Score for Crohn’s Disease (r = 0.466, P = 0.028) scores. Multiple linear regression analysis showed that serum UII levels retained significant association with high sensitivity C reactive peptide (β ± standard error, 0.262 ± 0.076, P < 0.001) and systolic blood pressure (0.040 ± 0.017, P = 0.030).
CONCLUSION It is possible that UII is involved in the complex pathophysiology of cardiovascular complications in IBD patients, and its purpose should be investigated in further studies.
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Affiliation(s)
- Damir Alicic
- Department of Gastroenterology, University Hospital of Split, Split 21000, Croatia
| | - Dinko Martinovic
- Department of Pathophysiology, University of Split School of Medicine, Split 21000, Croatia
| | - Doris Rusic
- Department of Pharmacy, University of Split School of Medicine, Split 21000, Croatia
| | - Piero Marin Zivkovic
- Department of Gastroenterology, University Hospital of Split, Split 21000, Croatia
| | - Ivana Tadin Hadjina
- Department of Gastroenterology, University Hospital of Split, Split 21000, Croatia
| | - Marino Vilovic
- Department of Pathophysiology, University of Split School of Medicine, Split 21000, Croatia
| | - Marko Kumric
- Department of Pathophysiology, University of Split School of Medicine, Split 21000, Croatia
| | - Daria Tokic
- Department of Anesthesiology and Intensive care, University Hospital of Split, Split 21000, Croatia
| | | | - Slaven Lupi-Ferandin
- Department of Maxillofacial Surgery, University Hospital of Split, Split 21000, Croatia
| | - Josko Bozic
- Department of Pathophysiology, University of Split School of Medicine, Split 21000, Croatia
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GRKs and Epac1 Interaction in Cardiac Remodeling and Heart Failure. Cells 2021; 10:cells10010154. [PMID: 33466800 PMCID: PMC7830799 DOI: 10.3390/cells10010154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 12/25/2022] Open
Abstract
β-adrenergic receptors (β-ARs) play a major role in the physiological regulation of cardiac function through signaling routes tightly controlled by G protein-coupled receptor kinases (GRKs). Although the acute stimulation of β-ARs and the subsequent production of cyclic AMP (cAMP) have beneficial effects on cardiac function, chronic stimulation of β-ARs as observed under sympathetic overdrive promotes the development of pathological cardiac remodeling and heart failure (HF), a leading cause of mortality worldwide. This is accompanied by an alteration in cAMP compartmentalization and the activation of the exchange protein directly activated by cAMP 1 (Epac1) signaling. Among downstream signals of β-ARs, compelling evidence indicates that GRK2, GRK5, and Epac1 represent attractive therapeutic targets for cardiac disease. Here, we summarize the pathophysiological roles of GRK2, GRK5, and Epac1 in the heart. We focus on their signalosome and describe how under pathological settings, these proteins can cross-talk and are part of scaffolded nodal signaling systems that contribute to a decreased cardiac function and HF development.
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Lee JH, Seo HW, Ryu JY, Lim CJ, Yi KY, Oh KS, Lee BH. KR-39038, a Novel GRK5 Inhibitor, Attenuates Cardiac Hypertrophy and Improves Cardiac Function in Heart Failure. Biomol Ther (Seoul) 2020; 28:482-489. [PMID: 32856617 PMCID: PMC7457178 DOI: 10.4062/biomolther.2020.129] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 07/30/2020] [Accepted: 08/05/2020] [Indexed: 12/24/2022] Open
Abstract
G protein-coupled receptor kinase 5 (GRK5) has been considered as a potential target for the treatment of heart failure as it has been reported to be an important regulator of pathological cardiac hypertrophy. To discover novel scaffolds that selectively inhibit GRK5, we have identified a novel small molecule inhibitor of GRK5, KR-39038 [7-((3-((4-((3-aminopropyl)amino)butyl)amino)propyl)amino)-2-(2-chlorophenyl)-6-fluoroquinazolin-4(3H)-one]. KR-39038 exhibited potent inhibitory activity (IC50 value=0.02 µM) against GRK5 and significantly inhibited angiotensin II-induced cellular hypertrophy and HDAC5 phosphorylation in neonatal cardiomyocytes. In the pressure overload-induced cardiac hypertrophy mouse model, the daily oral administration of KR-39038 (30 mg/kg) for 14 days showed a 43% reduction in the left ventricular weight. Besides, KR-39038 treatment (10 and 30 mg/kg/day, p.o.) showed significant preservation of cardiac function and attenuation of myocardial remodeling in a rat model of chronic heart failure following coronary artery ligation. These results suggest that potent GRK5 inhibitor could effectively attenuate both cardiac hypertrophy and dysfunction in experimental heart failure, and KR-39038 may be useful as an effective GRK5 inhibitor for pharmaceutical applications.
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Affiliation(s)
- Jeong Hyun Lee
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Ho Won Seo
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Jae Yong Ryu
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Chae Jo Lim
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.,Department of Medicinal and Pharmaceutical Chemistry, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Kyu Yang Yi
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.,Department of Medicinal and Pharmaceutical Chemistry, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Kwang-Seok Oh
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.,Department of Medicinal and Pharmaceutical Chemistry, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Byung Ho Lee
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.,Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea
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Abstract
G protein-coupled receptors (GPCRs) are critical cellular sensors that mediate numerous physiological processes. In the heart, multiple GPCRs are expressed on various cell types, where they coordinate to regulate cardiac function by modulating critical processes such as contractility and blood flow. Under pathological settings, these receptors undergo aberrant changes in expression levels, localization and capacity to couple to downstream signalling pathways. Conventional therapies for heart failure work by targeting GPCRs, such as β-adrenergic receptor and angiotensin II receptor antagonists. Although these treatments have improved patient survival, heart failure remains one of the leading causes of mortality worldwide. GPCR kinases (GRKs) are responsible for GPCR phosphorylation and, therefore, desensitization and downregulation of GPCRs. In this Review, we discuss the GPCR signalling pathways and the GRKs involved in the pathophysiology of heart disease. Given that increased expression and activity of GRK2 and GRK5 contribute to the loss of contractile reserve in the stressed and failing heart, inhibition of overactive GRKs has been proposed as a novel therapeutic approach to treat heart failure.
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Shang L, Chen T, Xian J, Deng Y, Huang Y, Zhao Q, Liang G, Liang Z, Lian F, Wei H, Huang Q. The caveolin-3 P104L mutation in LGMD-1C patients inhibits non-insulin-stimulated glucose metabolism and growth but promotes myocyte proliferation. Cell Biol Int 2019; 43:669-677. [PMID: 30958599 DOI: 10.1002/cbin.11144] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 03/23/2019] [Indexed: 12/21/2022]
Abstract
The caveolin-3 (CAV3) protein is known to be specifically expressed in various myocytes, and skeletal muscle consumes most of the blood glucose as an energy source to maintain normal cell metabolism and function. The P104L mutation in the coding sequence of the human CAV3 gene leads to autosomal dominant disease limb-girdle muscular dystrophy type 1C (LGMD-1C). We previously reported that C2C12 cells transiently transfected with the P104L CAV3 mutant exhibited decreased glucose uptake and glycogen synthesis after insulin stimulation. The present study aimed to examine whether the P104L mutation affects C2C12 cell glucose metabolism, growth, and proliferation without insulin stimulation. C2C12 cells stably transfected with CAV3-P104L were established, and biochemical assays, western blot analysis and confocal microscopy were used to observe glucose metabolism as well as cell growth and proliferation and to determine the effect of the P104L mutation on the PI3K/Akt signaling pathway. Without insulin stimulation, C2C12 cells stably transfected with the P104L CAV3 mutant exhibited decreased glucose uptake and glycogen synthesis, decreased CAV3 expression and reduced localization of CAV3 and GLUT4 on the cell membrane. The P104L mutant significantly reduced the cell diameters, but accelerated cell proliferation. Akt phosphorylation was inhibited, and protein expression of GLUT4, p-GSK3β, and p-p70s6K, which are molecules downstream of Akt, was significantly decreased. The CAV3-P104L mutation inhibits glycometabolism and cell growth but accelerates C2C12 cell proliferation by reducing CAV3 protein expression and cell membrane localization, which may contribute to the pathogenesis of LGMD-1C.
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Affiliation(s)
- Lina Shang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Tingting Chen
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Jing Xian
- Department of Endocrinology, Guangxi Medical University First Affiliated Hospital, Nanning, 530022, Guangxi, China
| | - Yufeng Deng
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Yiyuan Huang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Qiwei Zhao
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Guining Liang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Zhifeng Liang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Fang Lian
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Hongqiao Wei
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
| | - Qin Huang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, 530022, Guangxi, China
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Lieu M, Koch WJ. GRK2 and GRK5 as therapeutic targets and their role in maladaptive and pathological cardiac hypertrophy. Expert Opin Ther Targets 2019; 23:201-214. [PMID: 30701991 DOI: 10.1080/14728222.2019.1575363] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
INTRODUCTION One in every four deaths in the United States is attributed to cardiovascular disease, hence the development and employment of novel and effective therapeutics are necessary to improve the quality of life and survival of affected patient. Pathological hypertrophy is a maladaptive response by the heart to relieve wall stress that could result from cardiovascular disease. Maladaptive hypertrophy can lead to further disease progression and complications such as heart failure; hence, efforts to target hypertrophy to prevent and treat further morbidity and mortality are necessary. Areas covered: This review summarizes the compelling literature that describes the mechanistic role of GRK2 and GRK5 in maladaptive cardiac hypertrophy; it examines the approaches to inhibit these kinases in hypertrophic animal models and furthermore, it assesses the potential of GRK2 and GRK5 as therapeutic targets for hypertrophy. Expert opinion: GRK2 and GRK5 are novel therapeutic targets for pathological hypertrophy and may have added benefits of ameliorating morbidity and mortality. Despite the lesser researched role of GRK2 in cardiac hypertrophy, it may be the advantageous strategy for treating cardiac hypertrophy because of its role in other maladaptive pathways. Anti-GRK2 therapy optimization and the discovery and development of specific GRK2 and GRK5 small-molecule inhibitors is necessary for the eventual application of successful, effective therapeutics.
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Affiliation(s)
- Melissa Lieu
- a Center for Translational Medicine, Department of Pharmacology, Lewis Katz School of Medicine , Temple University , Philadelphia , PA , USA
| | - Walter J Koch
- a Center for Translational Medicine, Department of Pharmacology, Lewis Katz School of Medicine , Temple University , Philadelphia , PA , USA
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Sun SL, Liu LM. Urotensin II: an inflammatory cytokine. J Endocrinol 2019; 240:JOE-18-0505.R2. [PMID: 30601760 DOI: 10.1530/joe-18-0505] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 01/02/2019] [Indexed: 12/12/2022]
Abstract
Urotensin II (UII) is a polypeptide molecule with neurohormone-like activity. It has been confirmed that UII is widely distributed in numerous organs of different animal species from fish to mammals, including humans. The UII receptor is orphan G-protein coupled receptor 14, also known as UT. The tissue distribution of UII and UT is highly consistent, and their expression may be regulated by autocrine and paracrine mechanisms. In the body, UII has many physiological and pathophysiological activities, such as vasoconstrictor and vasodilatory actions, cell proliferation, pro-fibrosis, neuroendocrine activity, insulin resistance, and carcinogenic and inflammatory effects, which have been recognized only in recent years. In fact, UII is involved in the process of inflammatory injury and plays a key role in the onset and development of inflammatory diseases. In this paper, we will review the roles UII plays in inflammatory diseases.
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Affiliation(s)
- Sui-Lin Sun
- S Sun, Department of Infection, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China, Nanchang, China
| | - Liang-Ming Liu
- L Liu, Department of Infection, Songjiang Hospital Affiliated to First People's Hospital, Shanghai Jiaotong University, Shanghai, 201600, China
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The Protective Effect of Total Flavones from Rhododendron simsii Planch. on Myocardial Ischemia/Reperfusion Injury and Its Underlying Mechanism. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018. [PMID: 29541143 PMCID: PMC5818901 DOI: 10.1155/2018/6139372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Objectives Total flavones from Rhododendron simsii Planch. (TFR) are the effective part extracted from the flowers of Rhododendron simsii Planch. and have obvious protective effects against cerebral ischemic or myocardial injuries in rabbits and rats. However, their mechanism of cardioprotection is still unrevealed. Therefore, the present study was designed to investigate the effect of TFR on myocardial I/R injury and the underlying mechanism. Methods TFR groups were treated by gavage once a day for 3 days at a dose of 20, 40, and 80 mg/kg, respectively, and then the model of myocardial I/R injury was established. Myocardial infarction, ST-segment elevation, and the expression of UTR, ROCK1, ROCK2, and p-MLC protein in rat myocardium were determined at 90 min after reperfusion. UTR siRNA in vivo transfection and competition binding assay method were used to study the relationship between the protective effect of TFR and UTR. Results The expression of UTR protein markedly decreased in myocardium of UTR siRNA transfection group rats. TFR could significantly reduce the infarct size and inhibit the increase of RhoA activity and ROCK1, ROCK2, and p-MLC protein expressions both in WT and UTR knockdown rats. The reducing rate of TFR in myocardial infarction area, RhoA activity, and ROCK1, ROCK2, and p-MLC protein expressions in UTR knockdown rats decreased markedly compared with that in WT rats. In addition, TFR had no obvious effect on the increase of ΣST in UTR knockdown rats in comparison with that in model group. In particular, TFR could significantly inhibit the combination of [125I]-hu-II and UTR, and IC50 was 0.854 mg/l. Conclusions The results indicate that the protective effect of TFR on I/R injury may be correlated with its blocking UTR and the subsequent inhibition of RhoA/ROCK signaling pathway.
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12
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Shang L, Chen T, Deng Y, Huang Y, Huang Y, Xian J, Lu W, Yang L, Huang Q. Caveolin-3 promotes glycometabolism, growth and proliferation in muscle cells. PLoS One 2017; 12:e0189004. [PMID: 29206848 PMCID: PMC5716543 DOI: 10.1371/journal.pone.0189004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 11/16/2017] [Indexed: 11/18/2022] Open
Abstract
Objective Caveolin-3 (CAV3) protein is known to be expressed specifically in various myocytes, but its physiological function remains unclear. CAV3, located at the cell membrane, may promote the sensitivity of the Akt signaling pathway, which is closely related to glucose metabolism and to cell growth and proliferation. Methods The CAV3 gene was stably transfected into C2C12 muscle cells, and the effects were evaluated by biochemical assays, WB and confocal microscopy for the observation of cellular glucose metabolism, growth and proliferation, and the effect of CAV3 on the Akt signaling pathway with no insulin stimulation. Results After C2C12 cells were transfected with the mouse CAV3 gene, which increased CAV3 expression, the abundance of the CAV3 and GLUT4 proteins on the cell membrane increased, but the total GLUT4 protein content of the cell was unchanged. Glucose uptake was increased, and this did not affect the glycogen synthesis, but the cell surface area and cell proliferation increased. While there were significant increases in p-Akt and p-p70s6K, which is a downstream component of Akt signaling, the level of GSK3β protein, another component of Akt signaling did not change. Conclusions The muscle, CAV3 protein can activate Akt signaling, increase GLUT4 protein localization in the cell membrane, increase glucose uptake, and promote myocyte growth and proliferation. CAV3 protein has a physiological role in glycometabolism, growth and proliferation, independent of insulin stimulation.
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Affiliation(s)
- Lina Shang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
| | - Tingting Chen
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
| | - Yufeng Deng
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
| | - Yiyuan Huang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
| | - Yuanheng Huang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
| | - Jing Xian
- Department of Endocrinology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Wensheng Lu
- Department of Endocrinology, The People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Lihui Yang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
| | - Qin Huang
- Department of Physiology, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China
- * E-mail:
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13
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Todd I, Negm OH, Reps J, Radford P, Figueredo G, McDermott EM, Drewe E, Powell RJ, Bainbridge S, Hamed M, Crouch S, Garibaldi J, St-Gallay S, Fairclough LC, Tighe PJ. A signalome screening approach in the autoinflammatory disease TNF receptor associated periodic syndrome (TRAPS) highlights the anti-inflammatory properties of drugs for repurposing. Pharmacol Res 2017; 125:188-200. [PMID: 28860008 DOI: 10.1016/j.phrs.2017.08.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 08/10/2017] [Accepted: 08/22/2017] [Indexed: 12/26/2022]
Abstract
TNF receptor associated periodic syndrome (TRAPS) is an autoinflammatory disease caused by mutations in TNF Receptor 1 (TNFR1). Current therapies for TRAPS are limited and do not target the pro-inflammatory signalling pathways that are central to the disease mechanism. Our aim was to identify drugs for repurposing as anti-inflammatories based on their ability to down-regulate molecules associated with inflammatory signalling pathways that are activated in TRAPS. This was achieved using rigorously optimized, high through-put cell culture and reverse phase protein microarray systems to screen compounds for their effects on the TRAPS-associated inflammatory signalome. 1360 approved, publically available, pharmacologically active substances were investigated for their effects on 40 signalling molecules associated with pro-inflammatory signalling pathways that are constitutively upregulated in TRAPS. The drugs were screened at four 10-fold concentrations on cell lines expressing both wild-type (WT) TNFR1 and TRAPS-associated C33Y mutant TNFR1, or WT TNFR1 alone; signalling molecule levels were then determined in cell lysates by the reverse-phase protein microarray. A novel mathematical methodology was developed to rank the compounds for their ability to reduce the expression of signalling molecules in the C33Y-TNFR1 transfectants towards the level seen in the WT-TNFR1 transfectants. Seven high-ranking drugs were selected and tested by RPPA for effects on the same 40 signalling molecules in lysates of peripheral blood mononuclear cells (PBMCs) from C33Y-TRAPS patients compared to PBMCs from normal controls. The fluoroquinolone antibiotic lomefloxacin, as well as others from this class of compounds, showed the most significant effects on multiple pro-inflammatory signalling pathways that are constitutively activated in TRAPS; lomefloxacin dose-dependently significantly reduced expression of 7/40 signalling molecules across the Jak/Stat, MAPK, NF-κB and PI3K/AKT pathways. This study demonstrates the power of signalome screening for identifying candidates for drug repurposing.
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Affiliation(s)
- Ian Todd
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK
| | - Ola H Negm
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK; Medical Microbiology and Immunology Department, Faculty of Medicine, Mansoura University, Egypt
| | - Jenna Reps
- Advanced Data Analysis Centre, School of Computer Science, The University of Nottingham, Jubilee Campus, Nottingham NG8 1BB, UK
| | - Paul Radford
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK
| | - Grazziela Figueredo
- Advanced Data Analysis Centre, School of Computer Science, The University of Nottingham, Jubilee Campus, Nottingham NG8 1BB, UK
| | - Elizabeth M McDermott
- Nottingham University Hospitals National Health Service Trust, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | - Elizabeth Drewe
- Nottingham University Hospitals National Health Service Trust, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | - Richard J Powell
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK
| | - Susan Bainbridge
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK
| | - Mohamed Hamed
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK
| | - Sharon Crouch
- Business Engagement and Innovation Services, The University of Nottingham, Jubilee Campus, Nottingham NG8 1BB, UK
| | - Jon Garibaldi
- Advanced Data Analysis Centre, School of Computer Science, The University of Nottingham, Jubilee Campus, Nottingham NG8 1BB, UK
| | - Steve St-Gallay
- Sygnature Discovery Limited, BioCity, Pennyfoot Street, Nottingham NG1 1GF, UK
| | - Lucy C Fairclough
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK.
| | - Patrick J Tighe
- School of Life Sciences, The University of Nottingham, Life Sciences Building, University Park, Nottingham NG7 2RD, UK
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14
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Wu L, Cao Z, Ji L, Mei L, Jin Q, Zeng J, Lin J, Chu M, Li L, Yang X. Loss of TRADD attenuates pressure overload-induced cardiac hypertrophy through regulating TAK1/P38 MAPK signalling in mice. Biochem Biophys Res Commun 2016; 483:810-815. [PMID: 28013046 DOI: 10.1016/j.bbrc.2016.12.104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 12/16/2016] [Indexed: 12/19/2022]
Abstract
We investigated the role of tumour necrosis factor receptor (TNFR)-associated death domain (TRADD) on pressure overload-induced cardiac hypertrophy and the underlying molecular mechanisms by using a TRADD deficiency mice model. 6-8 weeks wild-type and TRADD knockout mice were performed to transverse aorta constriction (TAC) or sham operation (6-8 mice for each group). 14 days after TAC, cardiac function was measured by echocardiography, as well as by pathological and molecular analyses of heart samples. The expressions of cardiac hypertrophic and fibrotic markers were detected by qPCR. Phosphorylated and total TAK1, Akt, and p38 MAPK levels were examined by Western blotting. The ratios of lung or heart/body weight, wall thickness/chamber diameter of left ventricular and cross area of cardiomyocyte were significantly reduced in TRADD knockout (KO) mice than those of wild-type mice after TAC. Moreover, cardiac hypertrophic and fibrotic markers were downregulated in TRADD knockout mice than those of wild-type mice following TAC. Protein expression analysis showed phosphorylated TAK1, p38 MAPK and AKT were upregulated after TAC in both wild-type and TRADD KO mice, phosphorylation of TAK1 and p38 MAPK was reduced more remarkably after TRADD deficiency, while phosphorylated AKT expression was similar between TRADD KO and wild-type mice following TAC. Our data suggest that TRADD KO blunts pressure overload-induced cardiac hypertrophy through mediating TAK1/p38 MAPK but not AKT phosphorylation in mice.
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Affiliation(s)
- Lianpin Wu
- Department of Cardiology, The First Affiliated Hospital of Suzhou Medical University, 188 Shizi Road, Suzhou, Jiangsu, 215006, China; Department of Cardiology, The Second Affiliated Hospital of Wenzhou Medical University & Yuying Children Hospital, 109 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Zhiyong Cao
- Department of Cardiology, No 411 Hospital of People's Liberation Army, 15 East Jiangwan Road, Shanghai, 200081, China
| | - Ling Ji
- Department of Laparoscopic Surgery, The First Hospital Affiliated to Wenzhou Medical College, Wenzhou, Zhejiang, 325027, China
| | - Liqin Mei
- Department of Oral Prophylaxis and Hygiene, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China
| | - Qike Jin
- Department of Cardiology, The Second Affiliated Hospital of Wenzhou Medical University & Yuying Children Hospital, 109 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Jingjing Zeng
- Department of Cardiology, The Second Affiliated Hospital of Wenzhou Medical University & Yuying Children Hospital, 109 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Jiafeng Lin
- Department of Cardiology, The Second Affiliated Hospital of Wenzhou Medical University & Yuying Children Hospital, 109 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Maoping Chu
- Department of Cardiology, The Second Affiliated Hospital of Wenzhou Medical University & Yuying Children Hospital, 109 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Lei Li
- Department of Cardiology, The Second Affiliated Hospital of Wenzhou Medical University & Yuying Children Hospital, 109 Xueyuan Road, Wenzhou, Zhejiang, 325027, China.
| | - Xiangjun Yang
- Department of Cardiology, The First Affiliated Hospital of Suzhou Medical University, 188 Shizi Road, Suzhou, Jiangsu, 215006, China.
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