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Lozahic C, Maddock H, Wheatley M, Sandhu H. Doxorubicin alters G-protein coupled receptor-mediated vasocontraction in rat coronary arteries. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:5831-5845. [PMID: 38326659 DOI: 10.1007/s00210-024-02988-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
Doxorubicin (Doxo)-associated cardio-and vasotoxicity has been recognised as a serious complication of cancer chemotherapy. The purpose of this novel paper was to determine the effect of Doxo on G-protein coupled receptor (GPCR)-mediated vasocontraction located on vascular smooth muscle cells. Rat left anterior descending artery segments were incubated for 24 h with 0.5 µM Doxo. The vasocontractile responses by activation of endothelin receptor type A (ETA) and type B (ETB), serotonin receptor 1B (5-HT1B) and thromboxane A2 prostanoid receptor (TP) were investigated by a sensitive myography using specific agonists, while the specificity of the GPCR agonists was verified by applying selective antagonists (i.e. ETA and ETB agonist = 10- 14-10- 7.5 M endothelin-1 (ET-1); ETA antagonist = 10 µM BQ123; ETB agonists = 10- 14-10- 7.5 M sarafotoxin 6c (S6c) and ET-1; ETB antagonist = 0.1 µM BQ788; 5-HT1B agonist = 10- 12-10- 5.5 M 5-carboxamidotryptamine (5-CT); 5-HT1B antagonist = 1 µM GR55562; TP agonist = 10- 12-10- 6.5 M U46619; TP antagonist = 1 µM Seratrodast). Our results show that 0.5 µM Doxo incubation of LAD segments leads to an increased VSMC vasocontraction through the ETB, 5-HT1B and TP GPCRs, with a 2.2-fold increase in ETB-mediated vasocontraction at 10- 10.5 M S6c, a 2.0-fold increase in 5-HT1B-mediated vasocontraction at 10- 5.5 M 5-CT, and a 1.3-fold increase in TP-mediated vasocontraction at 10- 6.5 M U46619. Further studies unravelling the involvement of intracellular GPCR signalling pathways will broaden our understanding of the Doxo-induced vasotoxicity, and thus pave the way to mitigate the adverse effects by potential implementation of adjunct therapy options.
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MESH Headings
- Animals
- Male
- Doxorubicin/pharmacology
- Coronary Vessels/drug effects
- Coronary Vessels/metabolism
- Vasoconstriction/drug effects
- Antibiotics, Antineoplastic/pharmacology
- Antibiotics, Antineoplastic/toxicity
- Receptors, G-Protein-Coupled/metabolism
- Receptors, G-Protein-Coupled/agonists
- Receptors, G-Protein-Coupled/antagonists & inhibitors
- Rats, Wistar
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Receptors, Thromboxane A2, Prostaglandin H2/antagonists & inhibitors
- Receptors, Thromboxane A2, Prostaglandin H2/metabolism
- Receptors, Thromboxane A2, Prostaglandin H2/agonists
- Receptor, Serotonin, 5-HT1B/metabolism
- Rats
- Receptor, Endothelin B/metabolism
- Receptor, Endothelin B/agonists
- Receptor, Endothelin B/drug effects
- In Vitro Techniques
- Receptor, Endothelin A/metabolism
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Affiliation(s)
- Caroline Lozahic
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK
| | - Helen Maddock
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK
| | - Mark Wheatley
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK
| | - Hardip Sandhu
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK.
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Wu X, Liu L, Xue X, Li X, Zhao K, Zhang J, Li W, Yao W, Ding S, Jia C, Zhu F. Captive ERVWE1 triggers impairment of 5-HT neuronal plasticity in the first-episode schizophrenia by post-transcriptional activation of HTR1B in ALKBH5-m6A dependent epigenetic mechanisms. Cell Biosci 2023; 13:213. [PMID: 37990254 PMCID: PMC10664518 DOI: 10.1186/s13578-023-01167-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/07/2023] [Indexed: 11/23/2023] Open
Abstract
BACKGROUND Abnormalities in the 5-HT system and synaptic plasticity are hallmark features of schizophrenia. Previous studies suggest that the human endogenous retrovirus W family envelope (ERVWE1) is an influential risk factor for schizophrenia and inversely correlates with 5-HT4 receptor in schizophrenia. To our knowledge, no data describes the effect of ERVWE1 on 5-HT neuronal plasticity. N6-methyladenosine (m6A) regulates gene expression and impacts synaptic plasticity. Our research aims to systematically investigate the effects of ERVWE1 on 5-HT neuronal plasticity through m6A modification in schizophrenia. RESULTS HTR1B, ALKBH5, and Arc exhibited higher levels in individuals with first-episode schizophrenia compared to the controls and showed a strong positive correlation with ERVWE1. Interestingly, HTR1B was also correlated with ALKBH5 and Arc. Further analyses confirmed that ALKBH5 may be an independent risk factor for schizophrenia. In vitro studies, we discovered that ERVWE1 enhanced HTR1B expression, thereby activating the ERK-ELK1-Arc pathway and reducing the complexity and spine density of 5-HT neurons. Furthermore, ERVWE1 reduced m6A levels through ALKBH5 demethylation. ERVWE1 induced HTR1B upregulation by improving its mRNA stability in ALKBH5-m6A-dependent epigenetic mechanisms. Importantly, ALKBH5 mediated the observed alterations in 5-HT neuronal plasticity induced by ERVWE1. CONCLUSIONS Overall, HTR1B, Arc, and ALKBH5 levels were increased in schizophrenia and positively associated with ERVWE1. Moreover, ALKBH5 was a novel risk gene for schizophrenia. ERVWE1 impaired 5-HT neuronal plasticity in ALKBH5-m6A dependent mechanism by the HTR1B-ERK-ELK1-Arc pathway, which may be an important contributor to aberrant synaptic plasticity in schizophrenia.
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Affiliation(s)
- Xiulin Wu
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | | | - Xing Xue
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Xuhang Li
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Kexin Zhao
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Jiahang Zhang
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Wenshi Li
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Wei Yao
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Shuang Ding
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Chen Jia
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Fan Zhu
- State Key Laboratory of Virology, Department of Medical Microbiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.
- Hubei Province Key Laboratory of Allergy & Immunology, Wuhan University, Wuhan, 430071, China.
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3
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G-Protein-Coupled Receptors and Ischemic Stroke: a Focus on Molecular Function and Therapeutic Potential. Mol Neurobiol 2021; 58:4588-4614. [PMID: 34120294 DOI: 10.1007/s12035-021-02435-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/18/2021] [Indexed: 01/22/2023]
Abstract
In ischemic stroke, there is only one approved drug, tissue plasminogen activator, to be used in clinical conditions for thrombolysis. New neuroprotective therapies for ischemic stroke are desperately needed. Several targets and pathways have been shown to confer neuroprotective effects in ischemic stroke. G-protein-coupled receptors (GPCRs) are one of the most frequently targeted receptors for developing novel therapeutics for central nervous system disorders. GPCRs are a large family of cell surface receptors that response to a wide variety of extracellular stimuli. GPCRs are involved in a wide range of physiological and pathological processes. More than 90% of the identified non-sensory GPCRs are expressed in the brain, where they play important roles in regulating mood, pain, vision, immune responses, cognition, and synaptic transmission. There is also good evidence that GPCRs are implicated in the pathogenesis of stroke. This review narrates the pathophysiological role and possible targeted therapy of GPCRs in ischemic stroke.
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4
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Cao L, Lindstedt I, Edvinsson ML, Ping NN, Cao YX, Edvinsson L. Secondhand cigarette smoke induces increased expression of contractile endothelin receptors in rat coronary arteries via a MEK1/2 sensitive mechanism. SCAND CARDIOVASC J 2020; 55:50-55. [PMID: 32400208 DOI: 10.1080/14017431.2020.1762916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVES Cigarette smoke, a strong risk factor for cardiovascular diseases, upregulates contractile endothelin (ET) receptors in coronary arteries. The present study examined the effects of second hand cigarette smoke exposure on the contractile endothelin receptors and the role of the MEK1/2 pathway in rat coronary arteries. Design: Rats were exposed to secondhand smoke (SHS) for 8 weeks followed by intraperitoneal injection of a MEK1/2 inhibitor, U0126 daily for another 4 weeks. Contractile responses of isolated coronary arteries were recorded by a sensitive wire myograph. The receptor protein expression levels were examined by Western blotting. Results: The results showed that SHS in vivo caused increased expression of ET receptors ETA and ETB, and that the MEK1/2 blocker U0126 significantly reversed SHS exposure-increased ETA-mediated contractile responses and protein levels. Similar alterations were observed in ETB receptors. U0126 showed dose-dependent effects on SHS-induced response on contractile property and protein levels of the ETB receptor. However, only the higher dose U0126 (15 mg/kg) had inhibitory effects on the ETA receptor. Conclusions: Taken together, our data show that SHS increases contractile ET receptors and MEK1/2 pathway inhibitor offsets SHS exposure-induced ETA and ETB receptor upregulation in rat coronary arteries.
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Affiliation(s)
- Lei Cao
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Lund, Sweden.,Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Isak Lindstedt
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Lund, Sweden
| | - Marie-Louise Edvinsson
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Lund, Sweden
| | - Na-Na Ping
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Yong-Xiao Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Lars Edvinsson
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Lund, Sweden
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Hugelshofer M, Deuel J, Buzzi R, Humar R, Schaer D, Schaer C. Determining the Optimal Normalization Factor of Different Target Arteries for ex vivo Vascular Function Experiments: A New Standardized Procedure. J Vasc Res 2020; 57:106-112. [DOI: 10.1159/000505729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 01/03/2020] [Indexed: 11/19/2022] Open
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6
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Cheng YW, Guo YC, Li GL, Deng YN, Li WJ, Xu GF, Deng Z, Cao YX, Luo GG. Effects of a new magnesium-rich artificial cerebrospinal fluid on contractile 5-hydroxytryptamine and endothelin receptors in rat cerebral arteries. Neurol Res 2019; 41:1015-1023. [PMID: 31559927 DOI: 10.1080/01616412.2019.1672383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objectives Cerebral vasospasm after subarachnoid haemorrhage (SAH) is associated with cerebrovascular contractile receptor upregulation resulted from haemolysis in the subarachnoid space. This study developed a new magnesium-rich artificial cerebrospinal fluid (MACSF) formula and investigated its effects on receptor-mediated contraction in rat basilar arteries. Methods Clear and haemorrhagic cerebrospinal fluid (CSF) were collected from patients with hydrocephalus or SAH. MACSF was freshly prepared using clinical intravenous injections. Rat basilar arteries were segmented and incubated with clear CSF, haemorrhagic CSF or MACSF. The contractile responses were studied by myograph. The messenger ribonucleic acid (mRNA) and protein expression of 5-hydroxytryptamine 1B (5-HT1B), endothelin subtype B (ETB) and endothelin subtype A (ETA) receptors were evaluated by real-time polymerase chain reaction (PCR) and Western blot analyses. Results Haemorrhagic CSF exposure shifted the contractile curves induced by 5-hydroxytryptamine (5-HT), sarafotoxins 6c (S6c) and endothelin-1 (ET-1) leftward with increased maximal contraction values. Furthermore, mRNA and protein expression were markedly elevated for 5-HT1B, ETB and ETA receptors on arteries exposed to haemorrhagic CSF. However, the contractile responses to 5-HT, S6c or ET-1 and expression of 5-HT1B, ETB and ETA receptors in rat cerebral arteries exposed to MACSF remained unaffected compared to those exposed to clear CSF. Besides, unlike normal saline which can inactive in-vitro vessels, MACSF can maintain their physiological activity. Conclusion Haemorrhagic CSF induces upregulation of 5-HT1B, ETB and ETA receptors in rat cerebral arteries. However, MACSF can maintain in-vitro rat basilar arteries in good physiological activity and normal expression of contractile 5-HT and ET receptors.
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Affiliation(s)
- Ya-Wen Cheng
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
| | - Yi-Chen Guo
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
| | - Guo-Liang Li
- Department of Cardiovascular, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
| | - Yong-Ning Deng
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
| | - Wen-Juan Li
- Department of Neurology, Second Affiliated Hospital, Lanzhou University , Lanzhou , China
| | - Gao-Feng Xu
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
| | - Zhong Deng
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
| | - Yong-Xiao Cao
- Department of Pharmacology, Xi'an Jiaotong University Health Science Center , Xi'an , China
| | - Guo-Gang Luo
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an , China
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7
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Ouyang X, Zhang G, Pan H, Huang J. Susceptibility and severity of cancer-related fatigue in colorectal cancer patients is associated with SLC6A4 gene single nucleotide polymorphism rs25531 A>G genotype. Eur J Oncol Nurs 2018; 33:97-101. [PMID: 29551185 DOI: 10.1016/j.ejon.2018.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 02/09/2018] [Accepted: 02/15/2018] [Indexed: 12/16/2022]
Abstract
PURPOSE To explore the correlation between the SERT gene promoter single nucleotide polymorphisms (SNPs) rs25531 and rs956304 and the cancer-related fatigue (CRF) of colon and rectal cancer, and also to analyze the correlation of the interaction of genetic and non-genetic factors. METHOD A sample of 568 colon and rectal cancer patients were recruited from the Second Affiliated Hospital of Nanchang University from October 2013 to December 2015. The Chinese version of the Brief Fatigue Inventory (BFI-C) was used to evaluate the CRF. The genomic DNA was extracted from peripheral blood samples of the patients. Direct sequencing was used to determine the rs25531 and rs956304 genotypes. RESULTS Compared with the AA genotype, the risk of suffering from CRF and the severity of CRF increased to 1.77 times (95% CI = 1.22-2.59, P = 0.003) for patients who carry with G allele (AG+GG genotype) at rs25531 locus. CONCLUSIONS The SERT gene promoter SNP rs25531 was associated with the CRF in patients with colon and rectal cancer and the G genotype was an independent risk factor for CRF among individuals with colon and rectal cancer in the study.
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Affiliation(s)
- Xi Ouyang
- Department of Gastrointestinal Surgery, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Guanping Zhang
- Department of Gastrointestinal Surgery, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Hua Pan
- Department of Gastrointestinal Surgery, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Jun Huang
- Department of Gastrointestinal Surgery, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China.
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8
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Forman HJ, Finch CE. A critical review of assays for hazardous components of air pollution. Free Radic Biol Med 2018; 117:202-217. [PMID: 29407794 PMCID: PMC5845809 DOI: 10.1016/j.freeradbiomed.2018.01.030] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/22/2018] [Accepted: 01/25/2018] [Indexed: 12/11/2022]
Abstract
Increased mortality and diverse morbidities are globally associated with exposure to ambient air pollution (AAP), cigarette smoke (CS), and household air pollution (HAP). The AAP-CS-HAP aerosols present heterogeneous particulate matter (PM) of diverse chemical and physical characteristics. Some epidemiological models have assumed the same health hazards by PM weight for AAP, CS, and HAP regardless of the composition. While others have recognized that biological activities and toxicity will vary with components, we focus particularly on oxidation because of its major role in assay outcomes. Our review of PM assays considers misinterpretations of some chemical measures used for oxidative activity. Overall, there is low consistency across chemical and cell-based assays for oxidative and inflammatory activity. We also note gaps in understanding how much airborne PM of various sizes enter cells and organs. For CS, the body burden per cigarette may be much below current assumptions. Synergies shown for health hazards of AAP and CS suggest crosstalk in detoxification pathways mediated by AHR, NF-κB, and Nrf2. These complex genomic and biochemical interactions frustrate resolution of the toxicity of specific AAP components. We propose further strategies based on targeted gene expression based on cell-type differences.
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Affiliation(s)
- Henry Jay Forman
- Leonard Davis School of Gerontology, The University of Southern California, Los Angeles, CA, United States; School of Natural Sciences, University of California, Merced, CA, United States.
| | - Caleb Ellicott Finch
- Leonard Davis School of Gerontology, The University of Southern California, Los Angeles, CA, United States; Dornsife College, The University of Southern California, Los Angeles, CA, United States
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Liu Y, Chen XL, Xu CB, Cao L, Lin J, Chen G, Li J. Tail vein injection of mmLDL upregulates mouse mesenteric artery ET B receptors via activation of the ERK1/2 pathway. Vascul Pharmacol 2017; 96-98:33-39. [PMID: 28797761 DOI: 10.1016/j.vph.2017.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 07/03/2017] [Accepted: 08/04/2017] [Indexed: 12/30/2022]
Abstract
Minimally modified low density lipoprotein (mmLDL) is a risk factor for cardiovascular disease. This study investigated the effect of mmLDL on mouse mesenteric artery endothelin type B (ETB) receptors and its molecular mechanism. Mice were injected with normal saline (NS group), mmLDL in the tail vein (mmLDL group), or with both mmLDL and an intraperitoneal injection of the ERK1/2 pathway-specific inhibitor U0126 (mmLDL+U0126 group). The dose-response curve of mesenteric artery contraction induced by sarafotoxin 6c (S6c), the ETB receptor agonist, was measured using a sensitive myograph system. ELISAs, RT-PCR and Western blot were used to determine the serum concentrations of mouse oxidized low density lipoprotein (oxLDL), intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) as well as the expression of ETB receptors, ICAM-1, VCAM-1 and phosphorylated-extracellular signal-regulated kinase 1/2 (p-ERK1/2). The S6c-induced contraction dose-response curve was significantly enhanced by mmLDL treatment and showed a significantly higher Emax value than in the NS group (P<0.001), and the ETB receptor mRNA and protein expression in the vascular wall was significantly higher than in the NS group. The serum concentration and expression of ICAM-1 and VCAM-1 were also increased by mmLDL treatment, but intraperitoneal injection of U0126 inhibited these changes as well as the increase in p-ERK1/2 protein in the vessel wall caused by mmLDL. ICAM-1 and VCAM-1 serum concentrations were positively correlated with the S6c-induced maximum contraction of blood vessels. Increased in vivo levels of mmLDL increased the serum concentrations and expression of ICAM-1 and VCAM-1 by activating the ERK1/2 pathway, resulting in the expression of ETB receptors and the enhancement of contractile function in vascular smooth muscle. Understanding the effect of mmLDL on ETB receptors and its mechanism can provide ideas for cardiovascular disease prevention and treatment.
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Affiliation(s)
- Yang Liu
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hu'nan, China
| | - Xiao-Lan Chen
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China
| | - Cang-Bao Xu
- Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, China
| | - Lei Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Jie Lin
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China
| | - Gen Chen
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China
| | - Jie Li
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China; Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hu'nan, China.
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Cao L, Ping NN, Cao YX, Li W, Cai Y, Warfvinge K, Edvinsson L. The effects of MEK1/2 inhibition on cigarette smoke exposure-induced ET receptor upregulation in rat cerebral arteries. Toxicol Appl Pharmacol 2016; 304:70-8. [PMID: 27212444 DOI: 10.1016/j.taap.2016.05.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 05/11/2016] [Accepted: 05/18/2016] [Indexed: 10/24/2022]
Abstract
Cigarette smoking, a major stroke risk factor, upregulates endothelin receptors in cerebral arteries. The present study examined the effects of MEK1/2 pathway inhibition on cigarette smoke exposure-induced ET receptor upregulation. Rats were exposed to the secondhand smoke (SHS) for 8weeks followed by intraperitoneal injection of MEK1/2 inhibitor, U0126 for another 4weeks. The urine cotinine levels were assessed with high-performance liquid chromatography. Contractile responses of isolated cerebral arteries were recorded by a sensitive wire myograph. The mRNA and protein expression levels of receptor and MEK/ERK1/2 pathway molecules were examined by real-time PCR and Western blotting, respectively. Cerebral artery receptor localization was determined with immunohistochemistry. The results showed the urine cotinine levels from SHS exposure group were significantly higher than those from the fresh group. In addition, the MEK1/2 inhibitor, U0126 significantly reduced SHS exposure-increased ETA receptor mRNA and protein levels as well as contractile responses mediated by ETA receptors. The immunoreactivity of increased ETA receptor expression was primarily cytoplasmic in smooth muscle cells. In contrast, ETB receptor was noted in endothelial cells. However, the SHS-induced decrease in endothelium-dependent relaxation was unchanged after U0126 treatment. Furthermore, SHS increased the phosphorylation of MEK1/2 and ERK1/2 protein in cerebral arteries. By using U0126 could inhibit the phosphorylated ERK1/2 protein but not MEK1/2. Taken together, our data show that treatment with MEK1/2 pathway inhibitor offsets SHS exposure-induced ETA receptor upregulation in rat cerebral arteries.
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Affiliation(s)
- Lei Cao
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Sweden; Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Na-Na Ping
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Yong-Xiao Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Wei Li
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
| | - Yan Cai
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Karin Warfvinge
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Sweden
| | - Lars Edvinsson
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Sweden
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11
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Haanes KA, Kruse LS, Wulf-Johansson H, Stottrup CC, Sorensen GL, Edvinsson L. Contractile Changes in the Vasculature After Subchronic Smoking: A Comparison Between Wild Type and Surfactant Protein D Knock-Out Mice. Nicotine Tob Res 2015; 18:642-6. [DOI: 10.1093/ntr/ntv243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 10/16/2015] [Indexed: 01/04/2023]
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12
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Xiao X, Wang R, Cao L, Shen ZX, Cao YX. The Role of MAPK Pathways in Airborne Fine Particulate Matter-Induced Upregulation of Endothelin Receptors in Rat Basilar Arteries. Toxicol Sci 2015; 149:213-26. [PMID: 26496744 DOI: 10.1093/toxsci/kfv229] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Airborne fine particulate matter (PM(2.5)) increases the risk of cerebrovascular diseases. However, existing experimental data do not sufficiently explain how PM(2.5) affects cerebral vessels. This study sought to examine whether PM(2.5) alters endothelin (ET) receptor expression on rat cerebral arteries and the potential underlying mechanisms. Isolated rat basilar arteries were cultured with PM(2.5) aqueous suspension in the presence of mitogen-activated protein kinase (MAPK) pathway inhibitors. ET receptor-mediated vasomotor functions were recorded by a sensitive myograph. ET(A) and ET(B) receptor mRNA and protein expressions were assessed using quantitative real-time PCR, Western blotting, and immunohistochemistry, respectively. Compared with fresh and culture alone arteries, PM(2.5) significantly enhanced ET(A) and ET(B) receptor-mediated contractions and increased receptor mRNA and protein expressions in basilar arteries, indicating PM(2.5) upregulates ET(A) and ET(B) receptors. Culturing with SB386023 (MEK/ERK1/2 inhibitor), U0126 (ERK1/2 inhibitor), SP600125 [c-Jun N-terminal kinase (JNK) inhibitor], or SB203580 (p38 inhibitor) attenuated PM(2.5)-induced ETB receptor upregulation. PM(2.5)-induced enhancement of ET(A) receptor-mediated contraction and receptor expression was notably inhibited by SB386023 or U0126. However, neither SP600125 nor SB203580 had an effect on PM(2.5)-induced ET(A) receptor upregulation. In conclusion, PM(2.5) upregulates ET(A) and ET(B) receptors in rat basilar arteries. ET(B) receptor upregulation is involved in MEK/ERK1/2, JNK, and p38 MAPK pathways, and ET(A) receptors upregulation is associated with MEK/ERK1/2 pathway.
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Affiliation(s)
- Xue Xiao
- *Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, China
| | - Rong Wang
- *Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, China
| | - Lei Cao
- *Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, China;
| | - Zhen-xing Shen
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Yong-xiao Cao
- *Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, China
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13
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Ping NN, Li S, Mi YN, Cao L, Cao YX. Hydrogen sulphide induces vasoconstriction of rat coronary artery via activation of Ca(2+) influx. Acta Physiol (Oxf) 2015; 214:88-96. [PMID: 25711469 DOI: 10.1111/apha.12475] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 08/21/2014] [Accepted: 02/19/2015] [Indexed: 12/12/2022]
Abstract
AIM Hydrogen sulphide (H2S) exhibits a dual modulation of isolated artery tension. This study investigated the vasoconstrictive effect of sulphur sodium hydride (NaHS), a donor of gaseous H2S, on rat coronary artery. METHODS The contractile response of isolated arteries was recorded using a wire myograph. Fluo-3/AM was used to load vascular smooth muscle, and intracellular calcium was determined using confocal laser microscopy. The protein expression of Rho kinase was examined using Western blot. RESULTS NaHS induced concentration-dependent contractions of rat coronary artery, and the contraction reached approx. 65% of 60 mm KCl-induced contraction. The NaHS-induced contraction was elevated following the removal of endothelium or the use of the nitric oxide synthase inhibitor L-NAME. The cyclooxygenase inhibitor indomethacin reduced NaHS-induced contraction. The Rho kinase inhibitor Y-27632 significantly attenuated NaHS-induced vasoconstriction. Furthermore, NaHS elevated the protein expression of Rho kinase. NaHS-induced contraction was completely abolished in a Ca(2+)-free solution and suppressed by the Ca(2+) influx blocker nifedipine (100 nm). NaHS also significantly increased the change rate of Ca(2+) fluorescence intensity. However, treatment with a Cl(-)/HCO(3-) exchanger blocker, K(+) channel blockers, the mitogen-activated protein kinase inhibitor U-0126 or cyclic adenosine monophosphate did not affect contraction. Species-dependent differences in NaHS-induced vasoconstriction were observed because these effects were only modest in dog coronary artery and absent in rabbit coronary artery. CONCLUSIONS NaHS induces the contraction of rat coronary artery, which is dependent on the activation of Ca(2+) influx. Rho kinase likely participates in the vasoconstriction.
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Affiliation(s)
- N.-N. Ping
- Department of Pharmacology; Xi'an Jiaotong University College of Medicine; Xi'an China
| | - S. Li
- Department of Pharmacology; Xi'an Jiaotong University College of Medicine; Xi'an China
| | - Y.-N. Mi
- Department of Pharmacology; Xi'an Jiaotong University College of Medicine; Xi'an China
| | - L. Cao
- Department of Pharmacology; Xi'an Jiaotong University College of Medicine; Xi'an China
| | - Y.-X. Cao
- Department of Pharmacology; Xi'an Jiaotong University College of Medicine; Xi'an China
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14
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Ping NN, Cao L, Xiao X, Li S, Cao YX. The determination of optimal initial tension in rat coronary artery using wire myography. Physiol Res 2014; 63:143-6. [PMID: 24665830 DOI: 10.33549/physiolres.932631] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The aim of the present study was to determine the optimal initial tension, i.e. initial stretch for rat coronary artery when using the multi-wire myograph system. We used the normalization procedure to mimic physiological conditions and to stretch the coronary arterial segments to normalized internal circumference (IC(1)). It is determined the internal circumference when the vessel relaxed under a transmural pressure of 100 mm Hg (IC(100)), and the IC(1) is calculated by multiplying the IC(100) by a factor k. The impact of different factor k on the initial stretch and agonist-induced tension of coronary arteries were investigated. The results showed that the maximal agonist-induced tension was achieved at the factor k value of 0.90 and the initial stretch tension was given 1.16+/-0.04 mN/mm. The most appropriate factor k value was 0.90-0.95 and the most appropriate initial tension was 1.16-1.52 mN/mm. The equilibration time of the coronary artery segments should be at least 1.0 h. In the same optimal initial tension, the agonist-induced tension increased as equilibration time lengthened.
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Affiliation(s)
- N-N Ping
- Department of Pharmacology, Xi'an Jiaotong University College of Medicine, Xi'an Shaanxi, P.R. China.
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15
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Bondke Persson A, Persson PB. Extreme environments. Acta Physiol (Oxf) 2014; 212:189-90. [PMID: 25042108 DOI: 10.1111/apha.12347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Bondke Persson
- Institute of Vegetative Physiology; Charité-Universitaetsmedizin Berlin; Berlin Germany
| | - P. B. Persson
- Institute of Vegetative Physiology; Charité-Universitaetsmedizin Berlin; Berlin Germany
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16
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Zietzer A, Hillmeister P. Leucocyte telomere length as marker for cardiovascular ageing. Acta Physiol (Oxf) 2014; 211:251-6. [PMID: 24666613 DOI: 10.1111/apha.12284] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- A. Zietzer
- Charité - Universitaetsmedizin Berlin; Center for Cardiovascular Research & Experimental and Clinical Research Center; Richard-Thoma-Laboratories for Arteriogenesis; Berlin Germany
| | - P. Hillmeister
- Charité - Universitaetsmedizin Berlin; Center for Cardiovascular Research & Experimental and Clinical Research Center; Richard-Thoma-Laboratories for Arteriogenesis; Berlin Germany
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17
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Cao L, Cao YX, Xu CB, Edvinsson L. Altered endothelin receptor expression and affinity in spontaneously hypertensive rat cerebral and coronary arteries. PLoS One 2013; 8:e73761. [PMID: 24023902 PMCID: PMC3759417 DOI: 10.1371/journal.pone.0073761] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 07/23/2013] [Indexed: 11/21/2022] Open
Abstract
Background Hypertension is associated with arterial hyperreactivity, and endothelin (ET) receptors are involved in vascular pathogenesis. The present study was performed to examine the hypothesis that ET receptors were altered in cerebral and coronary arteries of spontaneously hypertensive rats (SHR). Methodology/Principal Findings Cerebral and coronary arteries were removed from SHR. Vascular contraction was recorded using a sensitive myograph system. Real-time PCR and Western blotting were used to quantify mRNA and protein expression of receptors and essential MAPK pathway molecules. The results demonstrated that both ETA and ETB receptor-mediated contractile responses in SHR cerebral arteries were shifted to the left in a nonparallel manner with increased maximum contraction compared with Wistar-Kyoto (WKY) rats. In SHR coronary arteries, the ETA receptor-mediated contraction curve was shifted to the left in parallel with an increased pEC50 compared with the arteries in WKY rats. There was no significant increase in ETB receptor-mediated contraction in SHR coronary arteries. ETA receptor mRNA and protein expression was increased in SHR cerebral arteries compared with the arteries in WKY rats. However, ETA receptor mRNA and protein levels in coronary arteries and ETB receptor protein levels in cerebral and coronary arteries remained unchanged in SHR compared with WKY rats. Meanwhile, phosphorylated ERK1/2 protein was significantly increased in SHR brain and heart vessels. Conclusions/Significance In SHR cerebral arteries, ETA receptor expression was upregulated. ETA receptor affinity was increased in coronary arteries, and ETB receptor affinity was increased in cerebral arteries. The ERK1/2 activation may be involved in the receptor alterations.
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Affiliation(s)
- Lei Cao
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Sweden
- * E-mail:
| | - Yong-Xiao Cao
- Department of Pharmacology, Xi’an Jiaotong University College of Medicine, Xi’an, Shaanxi, People’s Republic of China
| | - Cang-Bao Xu
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Sweden
- Institute of Basic and Translational Medicine, Xi’an Medical University, Xi’an, Shaanxi, People’s Republic of China
| | - Lars Edvinsson
- Division of Experimental Vascular Research, Institute of Clinical Sciences in Lund, Lund University, Sweden
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18
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Huang LH, Zhang PA, He JY, Liu J, Cao YX. DMSO-soluble cigarette smoke particles alter the expression of endothelin B receptor in rat coronary artery. J Vasc Res 2013; 50:238-48. [PMID: 23712000 DOI: 10.1159/000350866] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 03/17/2013] [Indexed: 11/19/2022] Open
Abstract
In coronary artery diseases, cigarette smoking is a risk factor and the endothelin system plays a key role in the pathogenesis. This study was to examine if dimethylsulfoxide-soluble smoke particles (DSP) upregulate endothelin type-B (ETB) receptors in the coronary artery and investigate the mechanism. The isolated rat coronary arteries were organ-cultured for 24 h. The contractile response of the coronary artery was recorded by myograph. The mRNA and protein expression of the ETB receptors was studied using quantitative real-time PCR and immunohistochemistry. Results showed that the ETB receptor agonist, sarafotoxin 6c, induced a weak contraction in the fresh coronary artery. After culture, the contraction curve mediated by ETB receptor was shifted towards the left with an increased Emax of 152 ± 12%. DSP of 0.2 and 0.4 μl/ml shifted the concentration-contractile curves towards the left with further increased Emax of 270 ± 26 and 280 ± 29%, respectively. The culture increased ETB receptor mRNA and protein levels from fresh arteries, which was further enhanced by DSP. PD98059 (ERK1/2 inhibitor), wedelolactone (NF-κB inhibitor), actinomycin D or cycloheximide significantly inhibited the DSP-enhanced contraction and expression of mRNA and protein of the ETB receptor. However, SB203580 (p38 inhibitor) further increased DSP-enhanced contraction and protein expression of the ETB receptor. The results indicate that DSP upregulates ETB receptors in rat coronary artery via ERK1/2 and the NF-κB pathway.
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Affiliation(s)
- Lin-Hong Huang
- Department of Pharmacology, Xi'an Jiaotong University College of Medicine, Xi'an, PR China
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