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Welcome MO, Dogo D, Nikos E Mastorakis. Cellular mechanisms and molecular pathways linking bitter taste receptor signalling to cardiac inflammation, oxidative stress, arrhythmia and contractile dysfunction in heart diseases. Inflammopharmacology 2023; 31:89-117. [PMID: 36471190 PMCID: PMC9734786 DOI: 10.1007/s10787-022-01086-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 10/11/2022] [Indexed: 12/12/2022]
Abstract
Heart diseases and related complications constitute a leading cause of death and socioeconomic threat worldwide. Despite intense efforts and research on the pathogenetic mechanisms of these diseases, the underlying cellular and molecular mechanisms are yet to be completely understood. Several lines of evidence indicate a critical role of inflammatory and oxidative stress responses in the development and progression of heart diseases. Nevertheless, the molecular machinery that drives cardiac inflammation and oxidative stress is not completely known. Recent data suggest an important role of cardiac bitter taste receptors (TAS2Rs) in the pathogenetic mechanism of heart diseases. Independent groups of researchers have demonstrated a central role of TAS2Rs in mediating inflammatory, oxidative stress responses, autophagy, impulse generation/propagation and contractile activities in the heart, suggesting that dysfunctional TAS2R signalling may predispose to cardiac inflammatory and oxidative stress disorders, characterised by contractile dysfunction and arrhythmia. Moreover, cardiac TAS2Rs act as gateway surveillance units that monitor and detect toxigenic or pathogenic molecules, including microbial components, and initiate responses that ultimately culminate in protection of the host against the aggression. Unfortunately, however, the molecular mechanisms that link TAS2R sensing of the cardiac milieu to inflammatory and oxidative stress responses are not clearly known. Therefore, we sought to review the possible role of TAS2R signalling in the pathophysiology of cardiac inflammation, oxidative stress, arrhythmia and contractile dysfunction in heart diseases. Potential therapeutic significance of targeting TAS2R or its downstream signalling molecules in cardiac inflammation, oxidative stress, arrhythmia and contractile dysfunction is also discussed.
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Affiliation(s)
- Menizibeya O Welcome
- Department of Physiology, Faculty of Basic Medical Sciences, College of Health Sciences, Nile University of Nigeria, Plot 681 Cadastral Zone, C-00 Research and Institution Area, Jabi Airport Road Bypass, FCT, Abuja, Nigeria.
| | - Dilli Dogo
- Department of Surgery, Faculty of Clinical Sciences, College of Health Sciences, Nile University of Nigeria, Abuja, Nigeria
| | - Nikos E Mastorakis
- Technical University of Sofia, Klement Ohridksi 8, Sofia, 1000, Bulgaria
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Asymmetric dimethylarginine aggravates blood-retinal barrier breakdown of diabetic retinopathy via inhibition of intercellular communication in retinal pericytes. Amino Acids 2019; 51:1515-1526. [PMID: 31576457 DOI: 10.1007/s00726-019-02788-1] [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: 06/04/2019] [Accepted: 09/14/2019] [Indexed: 10/25/2022]
Abstract
Blood-retinal barrier breakdown is the main pathological characteristics of diabetic retinopathy (DR). Asymmetric dimethylarginine (ADMA) was reported to be elevated in DR patients. In this study, we observed the dynamic profile of ADMA, retinal morphology and permeability of BRB at 2, 4 or 8 week of diabetic rats induced by a single intraperitoneal injection of streptozocin (60 mg/kg) and in cultured rat retinal pericytes pretreated with D-glucose (30 mM) for 1, 3, 5 and 7 days or ADMA (3, 10, 30 μM) for 24, 48 and 72 h, trying to explore the effects of ADMA on blood-retinal barrier in DR. Gap junction intercellular communication (GJIC) and the expression of blood-retinal barrier-specific component connexin 43 (Cx43) were examined in diabetic rats or cultured retinal pericytes to elucidate whether ADMA impacted blood-retinal barrier function via damaging Cx43-GJIC. The results showed that with increasing duration of diabetes, the ultrastructure of blood-retinal barrier of diabetic rats appeared cell junction damage, apoptosis of retinal pericytes and breakdown of barrier successively. The increases in retinal permeability, ADMA levels and Cx43 expression, and abnormal GJIC were observed in diabetic rats and retinal pericytes exposed to D-glucose (30 mM). A glucose-like effect was seen using ADMA or another L-arginine analogue NG-monomethyl-L-arginine or dimethylarginine dimethylaminohydrolases (DDAHs) siRNA, implicating that ADMA aggravated the breakdown of blood-retinal barrier via damaging Cx43-GJIC.
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Zhang H, He X, Wang Y, Sun X, Zhu L, Lei C, Yin J, Li X, Hou F, He W, Zhao D. Neuritin attenuates early brain injury in rats after experimental subarachnoid hemorrhage. Int J Neurosci 2017; 127:1087-1095. [PMID: 28562156 DOI: 10.1080/00207454.2017.1337013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Hang Zhang
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Xuejun He
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Yezhong Wang
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Xiaokun Sun
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Licang Zhu
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Chao Lei
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Jiangwen Yin
- Department of Anesthesiology, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Xiaotian Li
- Department of Neurosurgery, Weifang People's HospitalWeifang, Shandong, China
| | - Fandi Hou
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Wengao He
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
| | - Dong Zhao
- Department of Neurosurgery, First Affiliated Hospital of Medical College, Shihezi University, Xinjiang, China
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Neoatherosclerosis after Drug-Eluting Stent Implantation: Roles and Mechanisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:5924234. [PMID: 27446509 PMCID: PMC4944075 DOI: 10.1155/2016/5924234] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 05/24/2016] [Accepted: 05/25/2016] [Indexed: 01/17/2023]
Abstract
In-stent neoatherosclerosis (NA), characterized by a relatively thin fibrous cap and large volume of yellow-lipid accumulation after drug-eluting stents (DES) implantation, has attracted much attention owing to its close relationship with late complications, such as revascularization and late stent thrombosis (ST). Accumulating evidence has demonstrated that more than one-third of patients with first-generation DES present with NA. Even in the advent of second-generation DES, NA still occurs. It is indicated that endothelial dysfunction induced by DES plays a critical role in neoatherosclerotic development. Upregulation of reactive oxygen species (ROS) induced by DES implantation significantly affects endothelial cells healing and functioning, therefore rendering NA formation. In light of the role of ROS in suppression of endothelial healing, combining antioxidant therapies with stenting technology may facilitate reestablishing a functioning endothelium to improve clinical outcome for patients with stenting.
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Zhao D, Liu Q, Ji Y, Wang G, He X, Tian W, Xu H, Lei T, Wang Y. Effect of 18β-glycyrrhetinic acid on cerebral vasospasm caused by asymmetric dimethylarginine after experimental subarachnoid hemorrhage in rats. Neurol Res 2014; 37:476-83. [DOI: 10.1179/1743132814y.0000000462] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Tsang H, Leiper J, Hou Lao K, Dowsett L, Delahaye MW, Barnes G, Wharton J, Howard L, Iannone L, Lang NN, Wilkins MR, Wojciak-Stothard B. Role of asymmetric methylarginine and connexin 43 in the regulation of pulmonary endothelial function. Pulm Circ 2013; 3:675-91. [PMID: 24618552 DOI: 10.1086/674440] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Abstract Circulating levels of asymmetric dimethylarginine (ADMA), a nitric oxide synthase inhibitor, are increased in patients with idiopathic pulmonary hypertension (IPAH). We hypothesized that ADMA abrogates gap junctional communication, required for the coordinated regulation of endothelial barrier function and angiogenesis, and so contributes to pulmonary endothelial dysfunction. The effects of ADMA on expression and function of gap junctional proteins were studied in human pulmonary artery endothelial cells; pulmonary endothelial microvascular cells from mice deficient in an enzyme metabolizing ADMA, dimethylarginine dimethylaminohydrolase I (DDAHI); and blood-derived endothelial-like cells from patients with IPAH. Exogenous and endogenous ADMA inhibited protein expression and membrane localization of connexin 43 (Cx43) in a nitric oxide/soluble guanosine monophosphate/c-jun-dependent manner in pulmonary endothelial cells, resulting in the inhibition of gap junctional communication, increased permeability, and decreased angiogenesis. The effects of ADMA were prevented by overexpression of DDAHI or Cx43 and by treatment with rotigaptide. Blood-derived endothelial-like cells from IPAH patients displayed a distinct disease-related phenotype compared to cells from healthy controls, characterized by reduced DDAHI expression, increased ADMA production, and abnormal angiogenesis. In summary, we show that ADMA induces pulmonary endothelial dysfunction via changes in expression and activity of Cx43. Cells from IPAH patients exhibit abnormal DDAHI/Cx43 signaling as well as differences in gap junctional communication, barrier function, and angiogenesis. Strategies that promote DDAHI/Cx43 signaling may have an endothelium-protective effect and be beneficial in pulmonary vascular disease.
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Affiliation(s)
- Hilda Tsang
- 1 Centre for Pharmacology and Therapeutics, Imperial College London, London, United Kingdom
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PKCɛ mediates serine phosphorylation of connexin43 induced by lysophosphatidylcholine in neonatal rat cardiomyocytes. Toxicology 2013; 314:11-21. [DOI: 10.1016/j.tox.2013.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/17/2013] [Accepted: 08/02/2013] [Indexed: 01/23/2023]
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Chen S, Li N, Deb-Chatterji M, Dong Q, Kielstein JT, Weissenborn K, Worthmann H. Asymmetric dimethyarginine as marker and mediator in ischemic stroke. Int J Mol Sci 2012; 13:15983-6004. [PMID: 23443106 PMCID: PMC3546674 DOI: 10.3390/ijms131215983] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 11/14/2012] [Accepted: 11/21/2012] [Indexed: 02/07/2023] Open
Abstract
Asymmetric dimethylarginine (ADMA), an endogenous nitric oxide synthase (NOS) inhibitor, is known as mediator of endothelial cell dysfunction and atherosclerosis. Circulating ADMA levels are correlated with cardiovascular risk factors such as hypercholesterolemia, arterial hypertension, diabetes mellitus, hyperhomocysteinemia, age and smoking. Accordingly, clinical studies found evidence that increased ADMA levels are associated with a higher risk of cerebrovascular events. After the acute event of ischemic stroke, levels of ADMA and its analog symmetric dimethylarginine (SDMA) are elevated through augmentation of protein methylation and oxidative stress. Furthermore, cleavage of ADMA through dimethylarginine dimethylaminohydrolases (DDAHs) is reduced. This increase of dimethylarginines might be predictive for adverse clinical outcome. However, the definite role of ADMA after acute ischemic stroke still needs to be clarified. On the one hand, ADMA might contribute to brain injury by reduction of cerebral blood flow. On the other hand, ADMA might be involved in NOS-induced oxidative stress and excitotoxic neuronal death. In the present review, we highlight the current knowledge from clinical and experimental studies on ADMA and its role for stroke risk and ischemic brain injury in the hyperacute stage after stroke. Finally, further studies are warranted to unravel the relevance of the close association of dimethylarginines with stroke.
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Affiliation(s)
- Shufen Chen
- Department of Neurology, Hannover Medical School, 30623 Hannover, Germany; E-Mails: (S.C.); (N.L.); (M.D.-C.); (K.W.)
- Department of Neurology, Huashan Hospital Fudan University, Shanghai 200040, China; E-Mail:
| | - Na Li
- Department of Neurology, Hannover Medical School, 30623 Hannover, Germany; E-Mails: (S.C.); (N.L.); (M.D.-C.); (K.W.)
- Center for Systems Neuroscience (ZSN), 30559 Hannover, Germany
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing 10050, China
| | - Milani Deb-Chatterji
- Department of Neurology, Hannover Medical School, 30623 Hannover, Germany; E-Mails: (S.C.); (N.L.); (M.D.-C.); (K.W.)
| | - Qiang Dong
- Department of Neurology, Huashan Hospital Fudan University, Shanghai 200040, China; E-Mail:
| | - Jan T. Kielstein
- Department of Nephrology and Hypertension, Hannover Medical School, 30623 Hannover, Germany; E-Mail:
| | - Karin Weissenborn
- Department of Neurology, Hannover Medical School, 30623 Hannover, Germany; E-Mails: (S.C.); (N.L.); (M.D.-C.); (K.W.)
- Center for Systems Neuroscience (ZSN), 30559 Hannover, Germany
| | - Hans Worthmann
- Department of Neurology, Hannover Medical School, 30623 Hannover, Germany; E-Mails: (S.C.); (N.L.); (M.D.-C.); (K.W.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +49-511-532-3580; Fax: +49-511-532-3115
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Jia SJ, Zhang BK, Lai YQ, Deng HW, Li YJ. 3,4,5,6-Tetrahydroxyxanthone preserves intercellular communication by reduction of the endogenous nitric oxide synthase inhibitor level. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2011; 13:20-26. [PMID: 21253946 DOI: 10.1080/10286020.2010.539181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
To observe the direct effects of 3,4,5,6-tetrahydroxyxanthone on connexin43 (Cx43) expression in cultured endothelial cells, cells were treated with lysophosphatidylcholine (LPC, 10 mg/l) for 24 h in the presence or absence of different concentrations of 3,4,5,6-tetrahydroxyxanthone (1, 3, or 10 μmol l(- 1)). The reactive oxygen species (ROS) production, cell viability, asymmetric dimethylarginine (ADMA) levels, and Cx43 expression were detected. 3,4,5,6-Tetrahydroxyxanthone significantly inhibited the increase in ROS production and ADMA level, increased cell viability and up-regulated Cx43 mRNA and protein expression induced by LPC. 3,4,5,6-Tetrahydroxyxanthone has protective effect in LPC-induced atherosclerotic lesions, which is at least partly related to the reduction of ADMA level and downregulation of Cx43 expression.
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Affiliation(s)
- Su-Jie Jia
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, China
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Liu Y, Huang H, Xia W, Tang Y, Yuan M, Tang Q, Huang C. WITHDRAWN: Inhibition of NADPH oxidase up-regulates connexin 43 and ameliorates electrical remodeling in rabbits with heart failure. Biomed Pharmacother 2010:S0753-3322(10)00134-4. [PMID: 20934846 DOI: 10.1016/j.biopha.2010.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 08/13/2010] [Indexed: 10/19/2022] Open
Abstract
The Publisher regrets that this article is an accidental duplication of an article that has already been published, http://dx.doi.org/10.1016/j.biomag.2010.08.001. The duplicate article has therefore been withdrawn.
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Affiliation(s)
- Yu Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Cardiovascular Research Institute, Wuhan University, 238 Jiefang Road, Wuhan city, Hubei province 430060, PR China
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