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Zhang YT, He FN, Tong WF, Teng B. [Research progress on the correlation between pediatric obstructive sleep apnea syndrome and obesity]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:823-826. [PMID: 37599249 DOI: 10.3760/cma.j.cn115330-20230206-00050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Affiliation(s)
- Y T Zhang
- Department of Otolaryngology Head and Neck Surgery, the Second Norman Bethune Hospital of Jilin University, Jilin 130041, China
| | - F N He
- Department of Otolaryngology Head and Neck Surgery, the Second Norman Bethune Hospital of Jilin University, Jilin 130041, China
| | - W F Tong
- Department of Otolaryngology Head and Neck Surgery, the Second Norman Bethune Hospital of Jilin University, Jilin 130041, China
| | - B Teng
- Department of Otolaryngology Head and Neck Surgery, the Second Norman Bethune Hospital of Jilin University, Jilin 130041, China
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2
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Chen S, Li X, Zhang Y, Teng B, Liu D. Using hemoglobin/fibrinogen ratio as earlier consumptive coagulopathy relating marker for a successful rescued amniotic fluid embolism case. Rev Esp Anestesiol Reanim (Engl Ed) 2023; 70:423-424. [PMID: 37549830 DOI: 10.1016/j.redare.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 09/26/2022] [Indexed: 08/09/2023]
Affiliation(s)
- S Chen
- Department of Anesthesiology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - X Li
- Department of Anesthesiology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Y Zhang
- Department of Anesthesiology, Guangzhou, China
| | - B Teng
- Department of Anesthesiology, Guangzhou, China
| | - D Liu
- Department of Anesthesiology, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China.
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Ganzer PD, Loeian MS, Roof SR, Teng B, Lin L, Friedenberg DA, Baumgart IW, Meyers EC, Chun KS, Rich A, Tsao AL, Muir WW, Weber DJ, Hamlin RL. Dynamic detection and reversal of myocardial ischemia using an artificially intelligent bioelectronic medicine. Sci Adv 2022; 8:eabj5473. [PMID: 34985951 PMCID: PMC8730601 DOI: 10.1126/sciadv.abj5473] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Myocardial ischemia is spontaneous, frequently asymptomatic, and contributes to fatal cardiovascular consequences. Importantly, myocardial sensory networks cannot reliably detect and correct myocardial ischemia on their own. Here, we demonstrate an artificially intelligent and responsive bioelectronic medicine, where an artificial neural network (ANN) supplements myocardial sensory networks, enabling reliable detection and correction of myocardial ischemia. ANNs were first trained to decode spontaneous cardiovascular stress and myocardial ischemia with an overall accuracy of ~92%. ANN-controlled vagus nerve stimulation (VNS) significantly mitigated major physiological features of myocardial ischemia, including ST depression and arrhythmias. In contrast, open-loop VNS or ANN-controlled VNS following a caudal vagotomy essentially failed to reverse cardiovascular pathophysiology. Last, variants of ANNs were used to meet clinically relevant needs, including interpretable visualizations and unsupervised detection of emerging cardiovascular stress. Overall, these preclinical results suggest that ANNs can potentially supplement deficient myocardial sensory networks via an artificially intelligent bioelectronic medicine system.
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Affiliation(s)
- Patrick D. Ganzer
- Medical Devices and Neuromodulation, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
- Department of Biomedical Engineering, University of Miami, 1320 S Dixie Hwy., Coral Gables, FL 33146, USA
- The Miami Project to Cure Paralysis, University of Miami, 1095 NW 14th Terrace #48, Miami, FL 33136, USA
- Corresponding author.
| | - Masoud S. Loeian
- Medical Devices and Neuromodulation, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - Steve R. Roof
- QTest Labs, 6456 Fiesta Dr., Columbus, OH 43235, USA
| | - Bunyen Teng
- QTest Labs, 6456 Fiesta Dr., Columbus, OH 43235, USA
| | - Luan Lin
- Health Analytics, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - David A. Friedenberg
- Health Analytics, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - Ian W. Baumgart
- Medical Devices and Neuromodulation, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - Eric C. Meyers
- Medical Devices and Neuromodulation, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - Keum S. Chun
- Medical Devices and Neuromodulation, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - Adam Rich
- Health Analytics, Battelle Memorial Institute, 505 King Ave., Columbus, OH 43201, USA
| | - Allison L. Tsao
- Cardiovascular Section, Department of Medicine, VA Boston Healthcare System, Boston, MA 02130, USA
- Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - William W. Muir
- QTest Labs, 6456 Fiesta Dr., Columbus, OH 43235, USA
- College of Veterinary Medicine, Lincoln Memorial University, 6965 Cumberland Gap Parkway, Harrogate, TN 37752, USA
| | - Doug J. Weber
- Department of Mechanical Engineering and Neuroscience, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213, USA
| | - Robert L. Hamlin
- QTest Labs, 6456 Fiesta Dr., Columbus, OH 43235, USA
- Department of Veterinary Biosciences, The Ohio State University, 1900 Coffey Road, Columbus, OH 43201, USA
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4
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Teng B, Rice M, Rana D, Shelton D, Narine N, Al-Najjar H. 91P The role of endobronchial ultrasound guided transbronchial needle aspiration (EBUS-TBNA) in the diagnosis of large cell neuroendocrine carcinoma (LCNEC). J Thorac Oncol 2021. [DOI: 10.1016/s1556-0864(21)01933-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Teng B, Mustafa SJ, Teng O, Muir WW, Hamlin RL. Differential Mesenteric Venous and Arterial Vascular Reactivity to Adenosine between Rats, Dogs, Mini‐pigs, and Human. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.07493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Teng B, Bailey S, Rana D, Holbrook M, Al-Najjar H. A case report of the diagnosis of a primary pulmonary synovial sarcoma using endobronchial ultrasound-transbronchial needle aspiration (EBUS-TBNA) in conjunction with rapid on-site evaluation (ROSE). Lung Cancer 2020. [DOI: 10.1016/s0169-5002(20)30253-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Yadav VR, Teng B, Mustafa SJ. Enhanced A 1 adenosine receptor-induced vascular contractions in mesenteric artery and aorta of in L-NAME mouse model of hypertension. Eur J Pharmacol 2018; 842:111-117. [PMID: 30347181 DOI: 10.1016/j.ejphar.2018.10.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 10/13/2018] [Accepted: 10/17/2018] [Indexed: 01/28/2023]
Abstract
L-NAME-induced hypertension is commonly used to study endothelial dysfunction and related vascular effects. It has been reported that genetic deletion of A1 adenosine receptor (AR) reduces blood pressure (BP) increases in mice and thus, suggesting the involvement of A1AR. Thus, we sought to determine whether A1AR-induced vascular responses were altered in this mouse model of hypertension. L-NAME (1 mg/ml) was given in the drinking water for 28 days to mice. The BP was monitored using non-invasive tail-cuff system. Muscle tension studies were performed using DMT for mesenteric arteries (MAs) and organ bath for aorta. Protein expression was analyzed by western blot. Significantly, higher systolic and mean arterial blood pressure was noted in L-NAME mice. In MAs, higher 2-Chloro-N6-cyclopentyladenosine (CCPA, selective A1AR agonist) induced contractions in hypertensive mice were observed. This enhanced contraction was inhibited by HET0016 (Cytochrome 450 4A inhibitor, 10 µM, 15 min). Contrary, 5'-(N-Ethylcarboxamido) adenosine (NECA, non-selective AR agonist) induced vascular responses were comparable in both groups. Pinacidil (KATP channel opener) induced relaxation was significantly increased in hypertensive mice. In aorta, CCPA-induced contractions were enhanced and inhibited by HET0016 in hypertensive mice. Notably, NECA-induced contractions in aorta were enhanced in hypertensive mice. Higher expressions of A1AR and Cyp4A were noted in MAs of hypertensive mice. In addition, in aorta, higher A1AR and comparable Cyp4A levels were observed in hypertensive mice. A1AR-induced vascular contractions were enhanced in hypertensive mice aorta and MAs. Cyp4A plays a role in altered vascular responses in MAs.
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Affiliation(s)
- Vishal R Yadav
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA
| | - Bunyen Teng
- Coagulation and Blood Research Task Area, US Army Institute of Surgical Research, San Antonio, TX, USA
| | - S Jamal Mustafa
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA; Center for Translational Science Institute, West Virginia University, Morgantown, WV, USA.
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8
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Yadav VR, Zhou Z, Teng B, Mustafa SJS. Role of A
1
and A
2B
Adenosine receptors in Angiotensin II dependent hypertension in mice. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.715.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Vishal R. Yadav
- PhysiologyPharmacology and Neurosciences Clinical and Translational Science InstituteWest Virginia UniversityMorgantownWV
| | - Zhichao Zhou
- Molecular Vascular MedicineDepartment of MedicineKarolinska InstitutetStockholmSweden
| | - Bunyen Teng
- Coagulation and Blood Research Task AreaUS Army Institute of Surgical Researchsan AntonioTX
| | - S. Jamal S. Mustafa
- Physiology, Pharmacology and NeurosciencesClinical and Translational Science InstituteWest Virginia UniversityMorgantownWV
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9
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Labazi H, Teng B, Mustafa SJ. Functional changes in vascular reactivity to adenosine receptor activation in type I diabetic mice. Eur J Pharmacol 2017; 820:191-197. [PMID: 29269016 DOI: 10.1016/j.ejphar.2017.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/12/2017] [Accepted: 12/15/2017] [Indexed: 12/15/2022]
Abstract
Activation of adenosine receptors has been implicated in several biological functions, including cardiovascular and renal function. Diabetes causes morphological and functional changes in the vasculature, resulting in abnormal responses to various stimuli. Recent studies have suggested that adenosine receptor expression and signaling are altered in disease states such as hypertension, diabetes. Using a streptozotocin (STZ) mouse model of type I diabetes (T1D), we investigated the functional changes in aorta and resistance mesenteric arteries to adenosine receptor agonist activation in T1D. Organ baths and DMT wire myographs were used for muscle tension measurements in isolated vascular rings, and western blotting was used for protein analysis. Concentration response curves to selective adenosine receptor agonists, including CCPA (A1 receptor agonist), Cl-IBMECA (A3 receptor agonist), CGS-21680 (A2A receptor agonist), and BAY 60-6583 (A2B receptor agonist), were performed. We found that diabetes did not affect adenosine receptor agonist-mediated relaxation or contraction in mesenteric arteries. However, aortas from diabetic mice exhibited a significant decrease (P < 0.05) in A1 receptor-mediated vasoconstriction. In addition, the aortas from STZ-treated mice exhibited an increase in phenylephrine-mediated contraction (EC50 7.40 ± 0.08 in STZ vs 6.89 ± 0.14 in vehicle; P < 0.05), while relaxation to A2A receptor agonists (CGS-21680) tended to decrease in aortas from the STZ-treated group (not statistically significant). Our data suggest that changes in adenosine receptor(s) vascular reactivity in T1D is tissue specific, and the decrease in A1 receptor-mediated aortic contraction could be a compensatory mechanism to counterbalance the increased adrenergic vascular contractility observed in aortas from diabetic mice.
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Affiliation(s)
- Hicham Labazi
- Department of Physiology, Pharmacology and Neuroanatomy, West Virginia University, Morgantown, WV, USA.
| | - Bunyen Teng
- Department of Physiology, Pharmacology and Neuroanatomy, West Virginia University, Morgantown, WV, USA.
| | - S Jamal Mustafa
- Department of Physiology, Pharmacology and Neuroanatomy, West Virginia University, Morgantown, WV, USA; WV Center for Tranlational Science Institute, Morgantown, WV, USA.
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Teng B, Labazi H, Sun C, Yang Y, Zeng X, Mustafa SJ, Zhou Z. Divergent coronary flow responses to uridine adenosine tetraphosphate in atherosclerotic ApoE knockout mice. Purinergic Signal 2017; 13:591-600. [PMID: 28929376 PMCID: PMC5714849 DOI: 10.1007/s11302-017-9586-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 08/31/2017] [Indexed: 01/11/2023] Open
Abstract
Uridine adenosine tetraphosphate (Up4A) exerts potent relaxation in porcine coronary arteries that is reduced following myocardial infarction, suggesting a crucial role for Up4A in the regulation of coronary flow (CF) in cardiovascular disorders. We evaluated the vasoactive effects of Up4A on CF in atherosclerosis using ApoE knockout (KO) mice ex vivo and in vivo. Functional studies were conducted in isolated mouse hearts using the Langendorff technique. Immunofluorescence was performed to assess purinergic P2X1 receptor (P2X1R) expression in isolated mouse coronary arteries. In vivo effects of Up4A on coronary blood flow (CBF) were assessed using ultrasound. Infusion of Up4A (10-9-10-5 M) into isolated mouse hearts resulted in a concentration-dependent reduction in CF in WT and ApoE KO mice to a similar extent; this effect was exacerbated in ApoE KO mice fed a high-fat diet (HFD). The P2X1R antagonist MRS2159 restored Up4A-mediated decreases in CF more so in ApoE KO + HFD than ApoE KO mice. The smooth muscle to endothelial cell ratio of coronary P2X1R expression was greater in ApoE KO + HFD than ApoE KO or WT mice, suggesting a net vasoconstrictor potential of P2X1R in ApoE KO + HFD mice. In contrast, Up4A (1.6 mg/kg) increased CBF to a similar extent among the three groups. In conclusion, Up4A decreases CF more in ApoE KO + HFD mice, likely through a net upregulation of vasoconstrictor P2X1R. In contrast, Up4A increases CBF in vivo regardless of the atherosclerotic model.
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Affiliation(s)
- Bunyen Teng
- Department of Physiology and Pharmacology, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
- Coagulation and Blood Research Task Area, US Army Institute of Surgical Research, San Antonio, TX, USA
| | - Hicham Labazi
- Department of Physiology and Pharmacology, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
- Center for Cardiovascular Research and The Heart Center, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Changyan Sun
- Department of Physiology and Pharmacology, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
- Molecular Vascular Medicine, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Yan Yang
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Xiaorong Zeng
- Key Laboratory of Medical Electrophysiology of Ministry of Education, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - S Jamal Mustafa
- Department of Physiology and Pharmacology, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
| | - Zhichao Zhou
- Department of Physiology and Pharmacology, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA.
- Division of Cardiology, Department of Medicine, Karolinska University Hospital, Karolinska Institutet, 17176, Stockholm, Sweden.
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11
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Ye SF, Liu Z, Wang YF, He P, Wen LJ, Teng B. [The therapeutic effect of probiotics on allergic rhinitis:a Meta analysis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:467-474. [PMID: 29871288 DOI: 10.13201/j.issn.1001-1781.2017.06.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Indexed: 11/12/2022]
Abstract
Objective:To systemically review the therapeutic effect of probitics on allergic rhinitis(AR).Method:Literatures about the effect of probitics on AR were searched in PubMed. The Cochrane Library, Web of Science and CNKI, WanFang Data and VIP inception to April 2016,and 2 reviewers independently screened literatures according to the inclusion and exclusion criteria, extracted data, and assessed the risk of bias of included studies. Then meta-analysis was performed using RevMan5.2 software. Result:A total of 16RCTs involving1374 patients were included in the meta-analysis, including 809 cases in the probitic group and 568 cases in the placebo group. The results of meta-analysis showed that the efficacy of probitic group was superior to the placebo group in total RQLQ,nasal RQLQ,eye RQLQ and the serum eosinophil count,the difference was statistically significant [MD=-4.43,95%CI(-8.65~-0.20);MD=-1.08,95%CI(-1.89~0.27);MD=-0.95,95%CI(-1.46~-1.44);MD=-28.40,95%CI(-43.53~-13.26)].There was no significant difference in Serum IgE between the probitic group and the placebo group(P>0.05).There was no significant difference in the NTSS value between the lactobacillus group and the bifidobacterium group(P>0.05). Conclusion:Compared to the placebo, probitics can effectively reduce symptom scores of patients with AR;and different strains of probitics indicated no significant differences in improving nasal symptoms.
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Affiliation(s)
- S F Ye
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital of Jilin University,Changchun,130041,China
| | - Z Liu
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital of Jilin University,Changchun,130041,China
| | - Y F Wang
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital of Jilin University,Changchun,130041,China
| | - P He
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital of Jilin University,Changchun,130041,China
| | - L J Wen
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital of Jilin University,Changchun,130041,China
| | - B Teng
- Department of Otolaryngology Head and Neck Surgery, the Second Hospital of Jilin University,Changchun,130041,China
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12
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Zhou Z, Yadav VR, Sun C, Teng B, Mustafa JS. Impaired Aortic Contractility to Uridine Adenosine Tetraphosphate in Angiotensin II-Induced Hypertensive Mice: Receptor Desensitization? Am J Hypertens 2017; 30:304-312. [PMID: 28034895 DOI: 10.1093/ajh/hpw163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 12/01/2016] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE We previously showed that uridine adenosine tetraphosphate (Up4A)-mediated aortic contraction is partly mediated through purinergic P2X1 receptors (P2X1R). It has been reported that the plasma level of Up4A is elevated in hypertensive patients, implying a potential role for Up4A-P2X1R signaling in hypertension. This study investigated the vasoactive effect of Up4A in aortas isolated from angiotensin (Ang) II-infused (21 days) hypertensive mice. METHODS Blood pressure was measured by tail cuff plethysmography. Aortas were isolated for isometric tension measurements, and protein expression was analyzed by western blot. RESULTS Mean and systolic arterial pressures were elevated by ~50% in Ang II-infused mice. Protein levels of both AT1R and P2X1R were upregulated in Ang II-infused aortas. Surprisingly, Up4A (10-9-10-5 M)-induced concentration-dependent contraction was significantly impaired in Ang II-infused mice. Studies in control mice revealed that both P2X1R (MRS2159) and AT1R (losartan) antagonists significantly attenuated Up4A-induced aortic contraction. In addition, desensitization of AT1R by prior Ang II (100 nM) exposure had no effect on Up4A-induced aortic contraction. However, subsequent serial exposure responses to Up4A-induced aortic contraction were markedly reduced, suggesting a desensitization of purinergic receptors. This desensitization was further confirmed in control mice by prior exposure of aortas to the P2X1R desensitizer α, β-methylene ATP (10 μM). CONCLUSION Despite upregulation of AT1R and P2X1R in hypertension, Up4A-mediated aortic contraction was impaired in Ang II-infused mice, likely through the desensitization of P2X1R but not AT1R. This implies that vascular P2X1R activity, rather than plasma Up4A level, may determine the role of Up4A in hypertension.
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Affiliation(s)
- Zhichao Zhou
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, West Virginia, USA
- Present address: Division of Cardiology, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden
| | - Vishal R Yadav
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, West Virginia, USA
| | - Changyan Sun
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, West Virginia, USA
- Present address: Molecular Vascular Medicine, Department of Medicine, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden
| | - Bunyen Teng
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, West Virginia, USA
| | - Jamal S Mustafa
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, West Virginia, USA
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13
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Teng B, Tilley SL, Ledent C, Mustafa SJ. In vivo assessment of coronary flow and cardiac function after bolus adenosine injection in adenosine receptor knockout mice. Physiol Rep 2016; 4:4/11/e12818. [PMID: 27302991 PMCID: PMC4908494 DOI: 10.14814/phy2.12818] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 04/30/2016] [Indexed: 12/20/2022] Open
Abstract
Bolus injections of adenosine and the A2A adenosine receptor (AR) selective agonist (regadenoson) are used clinically as a substitute for a stress test in people who cannot exercise. Using isolated tissue preparations, our lab has shown that coronary flow and cardiac effects of adenosine are mostly regulated by the AR subtypes A1, A2A, and A2B In this study, we used ultrasound imaging to measure the in vivo effects of adenosine on coronary blood flow (left coronary artery) and cardiac function in anesthetized wild-type, A1 knockout (KO), A2AKO, A2BKO, A3KO, A1, and A3 double KO (A1/3 DKO) and A2A and A2B double KO (A2A/2B DKO) mice in real time. Echocardiographic and Doppler studies were performed using a Visualsonic Vevo 2100 ultrasound system. Coronary blood flow (CBF) baseline data were obtained when animals were anesthetized with 1% isoflourane. Diameter (D) and velocity time integral (VTI) were measured on the left coronary arteries (CBF = ((π/4) × D(2) × VTI × HR)/1000). CBF changes were the highest within 2 min of injection (about 10 mg/kg). Heart rate, cardiac output, and stroke volume were measured by tracing the left ventricle long axis. Our data support a role for the A2 AR in CBF and further support our conclusions of previous studies from isolated tissues. Adenosine-mediated decreases in cardiac output and stroke volume may be A2B and/or A3 AR-mediated; however, the A1 and A2 ARs also play roles in overall cardiac function. These data further provide a powerful translational tool in studying the cardiovascular effects of adenosine in disease states.
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Affiliation(s)
- Bunyen Teng
- Department of Physiology & Pharmacology, West Virginia University, Morgantown, West Virginia
| | - Stephen L Tilley
- Department of Medicine, University of North Carolina, Chapel Hill, North Carolina
| | | | - S Jamal Mustafa
- Department of Physiology & Pharmacology, West Virginia University, Morgantown, West Virginia
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14
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Ashton KJ, Reichelt ME, Mustafa SJ, Teng B, Ledent C, Delbridge LMD, Hofmann PA, Morrison RR, Headrick JP. Transcriptomic effects of adenosine 2A receptor deletion in healthy and endotoxemic murine myocardium. Purinergic Signal 2016; 13:27-49. [PMID: 27696085 DOI: 10.1007/s11302-016-9536-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/09/2016] [Indexed: 12/25/2022] Open
Abstract
Influences of adenosine 2A receptor (A2AR) activity on the cardiac transcriptome and genesis of endotoxemic myocarditis are unclear. We applied transcriptomic profiling (39 K Affymetrix arrays) to identify A2AR-sensitive molecules, revealed by receptor knockout (KO), in healthy and endotoxemic hearts. Baseline cardiac function was unaltered and only 37 A2AR-sensitive genes modified by A2AR KO (≥1.2-fold change, <5 % FDR); the five most induced are Mtr, Ppbp, Chac1, Ctsk and Cnpy2 and the five most repressed are Hp, Yipf4, Acta1, Cidec and Map3k2. Few canonical paths were impacted, with altered Gnb1, Prkar2b, Pde3b and Map3k2 (among others) implicating modified G protein/cAMP/PKA and cGMP/NOS signalling. Lipopolysaccharide (LPS; 20 mg/kg) challenge for 24 h modified >4100 transcripts in wild-type (WT) myocardium (≥1.5-fold change, FDR < 1 %); the most induced are Lcn2 (+590); Saa3 (+516); Serpina3n (+122); Cxcl9 (+101) and Cxcl1 (+89) and the most repressed are Car3 (-38); Adipoq (-17); Atgrl1/Aplnr (-14); H19 (-11) and Itga8 (-8). Canonical responses centred on inflammation, immunity, cell death and remodelling, with pronounced amplification of toll-like receptor (TLR) and underlying JAK-STAT, NFκB and MAPK pathways, and a 'cardio-depressant' profile encompassing suppressed ß-adrenergic, PKA and Ca2+ signalling, electromechanical and mitochondrial function (and major shifts in transcripts impacting function/injury including Lcn2, S100a8/S100a9, Icam1/Vcam and Nox2 induction, and Adipoq, Igf1 and Aplnr repression). Endotoxemic responses were selectively modified by A2AR KO, supporting inflammatory suppression via A2AR sensitive shifts in regulators of NFκB and JAK-STAT signalling (IκBζ, IκBα, STAT1, CDKN1a and RRAS2) without impacting the cardio-depressant gene profile. Data indicate A2ARs exert minor effects in un-stressed myocardium and selectively suppress NFκB and JAK-STAT signalling and cardiac injury without influencing cardiac depression in endotoxemia.
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Affiliation(s)
- Kevin J Ashton
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia
| | - Melissa E Reichelt
- School of Biomedical Sciences, University of Queensland, Brisbane, QLD, Australia
| | - S Jamal Mustafa
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA
| | - Bunyen Teng
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA
| | | | - Lea M D Delbridge
- Department of Physiology, University of Melbourne, Parkville, VIC, Australia
| | - Polly A Hofmann
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - R Ray Morrison
- Division of Critical Care Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - John P Headrick
- Heart Foundation Research Center, Griffith University, Southport, QLD, 4217, Australia.
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15
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Yadav VR, Zhou Z, Teng B, Mustafa SJ. Abstract P104: Role of Adenosine Receptors in Angiotensin II Dependent Hypertension in Mice. Hypertension 2016. [DOI: 10.1161/hyp.68.suppl_1.p104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Our recent finding showed that acute angiotensin (ANG) II stimulation enhanced A
1
adenosine receptor (AR) dependent cytochrome P450 (CYP) 4A mediated contraction in mouse mesenteric arteries (MA). In addition, A
2B
AR dependent and partly K
ATP
channel mediated relaxation was also reduced with ANGII stimulation. These data suggest a possible interaction between ANG II and ARs at vascular level which may play a role in ANG II dependent hypertension.
We developed ANG II (1000 ng/kg/min, 21 days) infused hypertension mouse model and tail cuff was used to measure blood pressure. Aorta as a conduit and MA (second order) as a resistance artery were chosen for muscle tension studies. Protein expressions in aortas and MAs were analyzed by western blot.
Infusion of ANG II increased systolic arterial blood pressure (SAP) in mice. Particularly, in ANG II infused mice, SAP (in mmHg, mean ± SD) at day 0 was 101.6 ± 6.675 which increased to 156.7 ± 15.68 on day 21 (p<0.05) while in saline control mice, SAP was 100.8 ± 6.753 (day 0) and changed to 105.4 ± 7.620 (day 21).
Higher expression of A
1
AR (~155% over 100%) and CYP4A (~50%, ~0.6 over 0.3, ratio to actin) was present in MAs in hypertensive compared to control mice. Expression of A
1
AR and CYP4A was comparable in aortas of hypertensive and control mice.
CCPA (A
1
AR agonist) -induced concentration dependent contraction (% normalize to phenylephrine contraction) was significantly reduced (~15% from 40% at 100 nM) in aorta of hypertensive mice compared to control. NECA (non-selective AR agonist) produced a significantly higher (~ -15% from 0% at 10 μM) relaxation in aorta of hypertensive mice. In MAs, CCPA-induced contraction was reduced in hypertensive mice. NECA induced relaxation was comparable in MAs. Pinacidil (K
ATP
channel opener) induced relaxation was significantly lower (~0% from -25% at 100 nM) in MAs of hypertensive mice.
In conclusion, our data reveal important role for A
1
AR dependent signaling in ANG II induced hypertension. Higher A1AR and CYP4A may reduce K
ATP
channel dependent relaxation of MAs aiding vascular contraction and blood pressure. Further studies involving ARs pharmacological inhibitors and genetic models are required to fully understand the relationship between ANG II and ARs in the development of hypertension.
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16
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Zhou X, Teng B, Mustafa SJ. Sex Difference in Coronary Endothelial Dysfunction in Apolipoprotein E Knockout Mouse: Role of NO and A2A Adenosine Receptor. Microcirculation 2016. [PMID: 26201383 DOI: 10.1111/micc.12222] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Sex plays an important role in the pathophysiology of cardiovascular diseases. This study aims to investigate how sex impacts on the coronary flow regulation during atherosclerosis. METHODS ApoE KO mouse fed with western diet were used for atherosclerosis model. Coronary RH and flow response were measured using Langendorff-perfused isolated hearts. RESULTS Coronary RH and A23187-induced NO-dependent flow increases were significantly reduced in female (by ~28% and 48%, respectively), but not in male atherosclerotic mice. However, SNP-induced coronary vasodilation remains intact in both sexes of ApoE KO mice. L-NAME (NOS inhibitor) reduced baseline flow and RH to a lesser extent in ApoE KO (by ~19% and 31%) vs. WT (~30% and 59%, respectively), and abolished the sex difference in RH. In contrast, SCH58261 (a selective A2A AR antagonist) reduced the baseline flow and RH to a greater extent in atherosclerotic mice, but did not affect the sex difference. Immunofluorescent staining of coronary arteries showed a similar A2A AR upregulation in both sexes of ApoE KO mice. CONCLUSIONS Our results suggest that during atherosclerosis, female mice are more susceptible to NO-dependent endothelial dysfunction and the upregulation of A2A AR may serve as a compensatory mechanism to counteract the compromised endothelial function.
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Affiliation(s)
- Xueping Zhou
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia, USA.,Center for Cardiovascular and Respiratory Sciences and West Virginia Clinical & Translational Science Institute, Morgantown, West Virginia, USA
| | - Bunyen Teng
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia, USA.,Center for Cardiovascular and Respiratory Sciences and West Virginia Clinical & Translational Science Institute, Morgantown, West Virginia, USA
| | - S J Mustafa
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia, USA.,Center for Cardiovascular and Respiratory Sciences and West Virginia Clinical & Translational Science Institute, Morgantown, West Virginia, USA
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17
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Labazi H, Teng B, Zhou Z, Mustafa SJ. Enhanced A2A adenosine receptor-mediated increase in coronary flow in type I diabetic mice. J Mol Cell Cardiol 2015; 90:30-7. [PMID: 26654777 DOI: 10.1016/j.yjmcc.2015.11.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 11/09/2015] [Accepted: 11/30/2015] [Indexed: 02/08/2023]
Abstract
Adenosine A2A receptor (A2AAR) activation plays a major role in the regulation of coronary flow (CF). Recent studies from our laboratory and others have suggested that A2AAR expression and/or signaling is altered in disease conditions. However, the coronary response to AR activation, in particular A2AAR, in diabetes is not fully understood. In this study, we use an STZ mouse model of type 1 diabetes (T1D) to look at CF responses to the nonspecific AR agonist NECA and the A2AAR specific agonist CGS 21680 in-vivo and ex-vivo. Using immunofluorescence, we also explored the effect of diabetes on A2AAR expression in coronary arteries. NECA mediated increase in CF was significantly increased in hearts isolated from STZ-induced diabetic mice. In addition, both in in-vivo and ex-vivo responses to A2AAR activation using CGS 21680 were significantly higher in diabetic mice when compared to their controls. Immunohistochemistry showed an upregulation of A2AAR in both coronary smooth muscle and endothelial cells (~160% and ~140%, respectively). Our data suggest that diabetes resulted in an increased A2AAR expression in coronary arteries which resulted in enhanced A2AAR-mediated increase in CF observed in diabetic hearts. This is the first report implying that A2AAR has a role in the regulation of CF in diabetes, supporting recent studies suggesting that the use of adenosine and its A2A selective agonist (regadenoson, Lexiscan®) may not be appropriate for the detection of coronary artery diseases in T1D and the estimation of coronary reserve.
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Affiliation(s)
- Hicham Labazi
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences and Clinical Translational Science Institute, West Virginia University, Morgantown, WV, United States
| | - Bunyen Teng
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences and Clinical Translational Science Institute, West Virginia University, Morgantown, WV, United States
| | - Zhichao Zhou
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences and Clinical Translational Science Institute, West Virginia University, Morgantown, WV, United States
| | - S Jamal Mustafa
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences and Clinical Translational Science Institute, West Virginia University, Morgantown, WV, United States.
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18
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Zhou Z, Rajamani U, Labazi H, Tilley SL, Ledent C, Teng B, Mustafa SJ. Involvement of NADPH oxidase in A2A adenosine receptor-mediated increase in coronary flow in isolated mouse hearts. Purinergic Signal 2015; 11:263-73. [DOI: 10.1007/s11302-015-9451-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Accepted: 04/16/2015] [Indexed: 12/22/2022] Open
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19
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Affiliation(s)
- Bunyen Teng
- Physiology & Pharmacology West Virginia UniversityMorgantownWVUnited States
| | - Stephen Tilley
- MedicineUniversity of North CarolineChapel HillNCUnited States
| | | | - S. Mustafa
- Physiology & Pharmacology West Virginia UniversityMorgantownWVUnited States
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20
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Zhou X, Teng B, Mustafa S. Gender Difference in Coronary Endothelial Dysfunction in ApoE Knockout Mouse Atherosclerosis Model: Role of NO and A
2A
Adenosine Receptor. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.627.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xueping Zhou
- Physiology & Pharmacology West Virginia UniversityMorgantownWVUnited States
| | - Bunyen Teng
- Physiology & Pharmacology West Virginia UniversityMorgantownWVUnited States
| | - S. Mustafa
- Physiology & Pharmacology West Virginia UniversityMorgantownWVUnited States
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21
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Zhou X, Teng B, Tilley S, Ledent C, Mustafa SJ. Metabolic hyperemia requires ATP-sensitive K+ channels and H2O2 but not adenosine in isolated mouse hearts. Am J Physiol Heart Circ Physiol 2014; 307:H1046-55. [PMID: 25108010 DOI: 10.1152/ajpheart.00421.2014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We have previously demonstrated that adenosine-mediated H2O2 production and opening of ATP-sensitive K(+) (KATP) channels contributes to coronary reactive hyperemia. The present study aimed to investigate the roles of adenosine, H2O2, and KATP channels in coronary metabolic hyperemia (MH). Experiments were conducted on isolated Langendorff-perfused mouse hearts using combined pharmacological approaches with adenosine receptor (AR) knockout mice. MH was induced by electrical pacing at graded frequencies. Coronary flow increased linearly from 14.4 ± 1.2 to 20.6 ± 1.2 ml·min(-1)·g(-1) with an increase in heart rate from 400 to 650 beats/min in wild-type mice. Neither non-selective blockade of ARs by 8-(p-sulfophenyl)theophylline (8-SPT; 50 μM) nor selective A2AAR blockade by SCH-58261 (1 μM) or deletion affected MH, although resting flow and left ventricular developed pressure were reduced. Combined A2AAR and A2BAR blockade or deletion showed similar effects as 8-SPT. Inhibition of nitric oxide synthesis by N-nitro-l-arginine methyl ester (100 μM) or combined 8-SPT administration failed to reduce MH, although resting flows were reduced (by ∼20%). However, glibenclamide (KATP channel blocker, 5 μM) decreased not only resting flow (by ∼45%) and left ventricular developed pressure (by ∼36%) but also markedly reduced MH by ∼94%, resulting in cardiac contractile dysfunction. Scavenging of H2O2 by catalase (2,500 U/min) also decreased resting flow (by ∼16%) and MH (by ∼24%) but to a lesser extent than glibenclamide. Our results suggest that while adenosine modulates coronary flow under both resting and ischemic conditions, it is not required for MH. However, H2O2 and KATP channels are important local control mechanisms responsible for both coronary ischemic and metabolic vasodilation.
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Affiliation(s)
- Xueping Zhou
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia; Center for Cardiovascular and Respiratory Sciences, West Virginia University, Morgantown, West Virginia
| | - Bunyen Teng
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia; Center for Cardiovascular and Respiratory Sciences, West Virginia University, Morgantown, West Virginia
| | - Stephen Tilley
- Department of Medicine, University of North Carolina, Chapel Hill, North Carolina; and
| | | | - S Jamal Mustafa
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia; Center for Cardiovascular and Respiratory Sciences, West Virginia University, Morgantown, West Virginia;
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22
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Mustafa J, Teng B. A1 adenosine receptor deletion or antagonism reduces atherosclerotic lesions in apolipoprotein E-deficient mice. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Labazi H, Zhou X, Teng B, Mustafa SJ. Increased basal and adenosine‐mediated coronary flow in ex vivo hearts from type I diabetic mice (1051.16). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.1051.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hicham Labazi
- Physiology and PharmacologyWest Virginia UniversityMorgantownWVUnited States
| | - Xueping Zhou
- Physiology and PharmacologyWest Virginia UniversityMorgantownWVUnited States
| | - Bunyen Teng
- Physiology and PharmacologyWest Virginia UniversityMorgantownWVUnited States
| | - S. Jamal Mustafa
- Physiology and PharmacologyWest Virginia UniversityMorgantownWVUnited States
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24
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Zhou X, Teng B, Mustafa SJ. Functional hyperemia requires ATP‐sensitive potassium channels and hydrogen peroxide and not adenosine in isolated mice hearts (1079.17). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.1079.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xueping Zhou
- physiology and pharmacology WVUMorgantownWVUnited States
| | - Bunyen Teng
- physiology and pharmacology WVUMorgantownWVUnited States
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25
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Teng B, Smith JD, Rosenfeld ME, Robinet P, Davis ME, Morrison RR, Mustafa SJ. A₁ adenosine receptor deficiency or inhibition reduces atherosclerotic lesions in apolipoprotein E deficient mice. Cardiovasc Res 2014; 102:157-65. [PMID: 24525840 DOI: 10.1093/cvr/cvu033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
AIMS The goal of this study was to determine whether the A1 adenosine receptor (AR) plays a role in atherosclerosis development and to explore its potential mechanisms. METHODS AND RESULTS Double knockout (DKO) mice, deficient in the genes encoding A1 AR and apolipoprotein E (apoE), demonstrated reduced atherosclerotic lesions in aortic arch (en face), aortic root, and innominate arteries when compared with apoE-deficient mice (APOE-KO) of the same age. Treating APOE-KO with an A1 AR antagonist (DPCPX) also led to a concentration-dependent reduction in lesions. The total plasma cholesterol and triglyceride levels were not different between DKO and APOE-KO; however, higher triglyceride was observed in DKO fed a high-fat diet. DKO also had higher body weights than APOE-KO. Plasma cytokine concentrations (IL-5, IL-6, and IL-13) were significantly lower in DKO. Proliferating cell nuclear antigen expression was also significantly reduced in the aorta from DKO. Despite smaller lesions in DKO, the composition of the innominate artery lesion and cholesterol loading and efflux from bone marrow-derived macrophages of DKO were not different from APOE-KO. CONCLUSION The A1 AR may play a role in the development of atherosclerosis, possibly due to its pro-inflammatory and mitogenic properties.
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Affiliation(s)
- Bunyen Teng
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, West Virginia University, 1 Medical Center Drive, Morgantown, WV, USA
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26
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Zhou X, Teng B, Tilley S, Mustafa SJ. A1 adenosine receptor negatively modulates coronary reactive hyperemia via counteracting A2A-mediated H2O2 production and KATP opening in isolated mouse hearts. Am J Physiol Heart Circ Physiol 2013; 305:H1668-79. [PMID: 24043252 DOI: 10.1152/ajpheart.00495.2013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We previously demonstrated that A2A, but not A2B, adenosine receptors (ARs) mediate coronary reactive hyperemia (RH), possibly by producing H2O2 and, subsequently, opening ATP-dependent K(+) (KATP) channels in coronary smooth muscle cells. In this study, A1 AR knockout (KO), A3 AR KO, and A1 and A3 AR double-KO (A1/A3 DKO) mice were used to investigate the roles and mechanisms of A1 and A3 ARs in modulation of coronary RH. Coronary flow of isolated hearts was measured using the Langendorff system. A1 KO and A1/A3 DKO, but not A3 KO, mice showed a higher flow debt repayment [~30% more than wild-type (WT) mice, P < 0.05] following a 15-s occlusion. SCH-58261 (a selective A2A AR antagonist, 1 μM) eliminated the augmented RH, suggesting the involvement of enhanced A2A AR-mediated signaling in A1 KO mice. In isolated coronary arteries, immunohistochemistry showed an upregulation of A2A AR (1.6 ± 0.2 times that of WT mice, P < 0.05) and a higher magnitude of adenosine-induced H2O2 production in A1 KO mice (1.8 ± 0.3 times that of WT mice, P < 0.05), which was blocked by SCH-58261. Catalase (2,500 U/ml) and glibenclamide (a KATP channel blocker, 5 μM), but not N(G)-nitro-l-arginine methyl ester, also abolished the enhanced RH in A1 KO mice. Our data suggest that A1, but not A3, AR counteracts the A2A AR-mediated CF increase and that deletion of A1 AR results in upregulation of A2A AR and/or removal of the negative modulatory effect of A1 AR, thus leading to an enhanced A2A AR-mediated H2O2 production, KATP channel opening, and coronary vasodilation during RH. This is the first report implying that A1 AR has a role in coronary RH.
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Affiliation(s)
- Xueping Zhou
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia
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27
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El-Awady MS, Rajamani U, Teng B, Tilley SL, Mustafa SJ. Evidence for the involvement of NADPH oxidase in adenosine receptors-mediated control of coronary flow using A 1 and A 3 knockout mice. Physiol Rep 2013; 1:e00070. [PMID: 24159377 PMCID: PMC3804374 DOI: 10.1002/phy2.70] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The NADPH oxidase (Nox) subunits 1, 2 (gp91 phox) and 4 are the major sources for reactive oxygen species (ROS) in cardiovascular system. In conditions such as ischemia-reperfusion injury and hypoxia, both ROS and adenosine are released suggesting a possible interaction. We hypothesized that ROS generated through Nox is involved in adenosine-induced coronary flow (CF) responses. Adenosine (10-8-10-5.5 M) increased CF in isolated hearts from wild type (WT; C57/BL6), A1 adenosine receptor (AR) knockout (A1KO), A3AR KO (A3KO) and A1 and A3AR double KO (A1/A3DKO) mice. The Nox inhibitors apocynin (10-5 M) and gp91 ds-tat (10-6 M) or the SOD and catalase-mimicking agent EUK134 (50 μM) decreased the adenosine-enhanced CF in the WT and all the KOs. Additionally, adenosine increased phosphorylation of p47-phox subunit and ERK 1/2 without changing protein expression of Nox isoforms in WT. Moreover, intracellular superoxide production was increased by adenosine and CGS-21680 (a selective A2A agonist), but not BAY 60-6583 (a selective A2B agonist), in mouse coronary artery smooth muscle cells (CASMCs) and endothelial cells (CAECs). This superoxide increase was inhibited by the gp91 ds-tat and ERK 1/2 inhibitor (PD98059). In conclusion, adenosine-induced increase in CF in isolated heart involves Nox2-generated superoxide, possibly through ERK 1/2 phosphorylation with subsequent p47-phox subunit phosphorylation. This adenosine/Nox/ROS interaction occurs in both CASMCs and CAECs, and involves neither A1 nor A3 ARs, but possibly A2A ARs in mouse.
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Affiliation(s)
- Mohammed S El-Awady
- Department of Physiology and Pharmacology,Center for Cardiovascular and Respiratory Sciences and Clinical & Translational Science Institute, West Virginia University, Morgantown, WV 26505, USA ; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
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28
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Liu SY, Teng B, Fu J, Li X, Zheng Y, Sun XX. Obstetric and neonatal outcomes after transfer of vitrified early cleavage embryos. Hum Reprod 2013; 28:2093-100. [DOI: 10.1093/humrep/det104] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Zhou X, Teng B, Mustafa SJ. A
1
Adenosine Receptor Negatively Modulates Coronary Reactive Hyperemia via Counteracting A
2A
‐mediated H
2
O
2
Production and Opening of K
ATP
Channel in Isolated Mice Hearts. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.1185.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xueping Zhou
- Physiology and PharmacologyWest Virginia UniversityMorgantownWV
| | - Bunyen Teng
- Physiology and PharmacologyWest Virginia UniversityMorgantownWV
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30
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Sharifi-Sanjani M, Zhou X, Asano S, Tilley S, Ledent C, Teng B, Dick GM, Mustafa SJ. Interactions between A(2A) adenosine receptors, hydrogen peroxide, and KATP channels in coronary reactive hyperemia. Am J Physiol Heart Circ Physiol 2013; 304:H1294-301. [PMID: 23525711 DOI: 10.1152/ajpheart.00637.2012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Myocardial metabolites such as adenosine mediate reactive hyperemia, in part, by activating ATP-dependent K(+) (K(ATP)) channels in coronary smooth muscle. In this study, we investigated the role of adenosine A(2A) and A(2B) receptors and their signaling mechanisms in reactive hyperemia. We hypothesized that coronary reactive hyperemia involves A(2A) receptors, hydrogen peroxide (H(2)O(2)), and KATP channels. We used A(2A) and A(2B) knockout (KO) and A(2A/2B) double KO (DKO) mouse hearts for Langendorff experiments. Flow debt for a 15-s occlusion was repaid 128 ± 8% in hearts from wild-type (WT) mice; this was reduced in hearts from A(2A) KO and A(2A)/(2B) DKO mice (98 ± 9 and 105 ± 6%; P < 0.05), but not A(2B) KO mice (123 ± 13%). Patch-clamp experiments demonstrated that adenosine activated glibenclamide-sensitive KATP current in smooth muscle cells from WT and A(2B) KO mice (90 ± 23% of WT) but not A(2A) KO or A(2A)/A(2B) DKO mice (30 ± 4 and 35 ± 8% of WT; P < 0.05). Additionally, H(2)O(2) activated KATP current in smooth muscle cells (358 ± 99%; P < 0.05). Catalase, an enzyme that breaks down H(2)O(2), attenuated adenosine-induced coronary vasodilation, reducing the percent increase in flow from 284 ± 53 to 89 ± 13% (P < 0.05). Catalase reduced the repayment of flow debt in hearts from WT mice (84 ± 9%; P < 0.05) but had no effect on the already diminished repayment in hearts from A(2A) KO mice (98 ± 7%). Our findings suggest that adenosine A(2A) receptors are coupled to smooth muscle KATP channels in reactive hyperemia via the production of H(2)O(2) as a signaling intermediate.
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Affiliation(s)
- Maryam Sharifi-Sanjani
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV 26506, USA
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Mahmoud AM, Sandoval C, Teng B, Schnermann JB, Martin KH, Mustafa SJ, Mukdadi OM. High-resolution vascular tissue characterization in mice using 55MHz ultrasound hybrid imaging. Ultrasonics 2013; 53:727-738. [PMID: 23218908 PMCID: PMC3639478 DOI: 10.1016/j.ultras.2012.10.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 10/24/2012] [Accepted: 10/29/2012] [Indexed: 06/01/2023]
Abstract
Ultrasound and Duplex ultrasonography in particular are routinely used to diagnose cardiovascular disease (CVD), which is the leading cause of morbidity and mortality worldwide. However, these techniques may not be able to characterize vascular tissue compositional changes due to CVD. This work describes an ultrasound-based hybrid imaging technique that can be used for vascular tissue characterization and the diagnosis of atherosclerosis. Ultrasound radiofrequency (RF) data were acquired and processed in time, frequency, and wavelet domains to extract six parameters including time integrated backscatter (T(IB)), time variance (T(var)), time entropy (T(E)), frequency integrated backscatter (F(IB)), wavelet root mean square value (W(rms)), and wavelet integrated backscatter (W(IB)). Each parameter was used to reconstruct an image co-registered to morphological B-scan. The combined set of hybrid images were used to characterize vascular tissue in vitro and in vivo using three mouse models including control (C57BL/6), and atherosclerotic apolipoprotein E-knockout (APOE-KO) and APOE/A(1) adenosine receptor double knockout (DKO) mice. The technique was tested using high-frequency ultrasound including single-element (center frequency=55 MHz) and commercial array (center frequency=40 MHz) systems providing superior spatial resolutions of 24 μm and 40 μm, respectively. Atherosclerotic vascular lesions in the APOE-KO mouse exhibited the highest values (contrast) of -10.11±1.92 dB, -12.13±2.13 dB, -7.54±1.45 dB, -5.10±1.06 dB, -5.25±0.94 dB, and -10.23±2.12 dB in T(IB), T(var), T(E), F(IB), W(rms), W(IB) hybrid images (n=10, p<0.05), respectively. Control segments of normal vascular tissue showed the lowest values of -20.20±2.71 dB, -22.54±4.54 dB, -14.94±2.05 dB, -9.64±1.34 dB, -10.20±1.27 dB, and -19.36±3.24 dB in same hybrid images (n=6, p<0.05). Results from both histology and optical images showed good agreement with ultrasound findings within a maximum error of 3.6% in lesion estimation. This study demonstrated the feasibility of a high-resolution hybrid imaging technique to diagnose atherosclerosis and characterize plaque components in mouse. In the future, it can be easily implemented on commercial ultrasound systems and eventually translated into clinics as a screening tool for atherosclerosis and the assessment of vulnerable plaques.
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Affiliation(s)
- Ahmed M Mahmoud
- Center for Ultrasound Molecular Imaging and Therapeutics, Heart and Vascular Institute, University of Pittsburgh, Pittsburgh, PA 15261, United States.
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Rayego-Mateos S, Rodrigues-Diez R, Rodrigues-Diez RR, Lavoz-Barria C, Alique M, Mas S, Pato J, Keri G, Egido J, Ortiz A, Ruiz-Ortega M, Ying L, Tepel M, Frank E, Florian T, Gregor T, Boye J, Maik G, Teng B, Gu C, Haller H, Sever S, Schiffer M, Worthmann K, Leitges M, Dittrich-Breiholz O, Kracht M, Haller H, Schiffer M, Peired A, Angelotti ML, Ronconi E, Lazzeri E, Sisti A, Lasagni L, Romagnani P. Mechanisms and targets of glomerular damage. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yi Chun DX, Alexandre H, Edith B, Nacera O, Julie P, Chantal J, Eric R, Zhang X, Jin Y, Miravete M, Dissard R, Klein J, Gonzalez J, Caubet C, Pecher C, Pipy B, Bascands JL, Mercier-Bonin M, Schanstra J, Buffin-Meyer B, Claire R, Rigothier C, Richard D, Sebastien L, Moin S, Chantal B, Christian C, Jean R, Migliori M, Migliori M, Cantaluppi V, Mannari C, Medica D, Giovannini L, Panichi V, Goldwich A, Alexander S, Andre G, Amann K, Migliorini A, Sagrinati C, Angelotti ML, Mulay SR, Ronconi E, Peired A, Romagnani P, Anders HJ, Chiang WC, Lai CF, Peng WH, Wu CF, Chang FC, Chen YT, Lin SL, Chen YM, Wu KD, Lu KS, Tsai TJ, Virgine O, Qing Feng F, Zhang SY, Dominique D, Vincent A, Marina C, Philippe L, Georges G, Pawlak A, Sahali D, Matsumoto S, Kiyomoto H, Ichimura A, Dan T, Nakamichi T, Tsujita T, Akahori K, Ito S, Miyata T, Xie S, Zhang B, Shi W, Yang Y, Nagasu H, Satoh M, Kidokoro K, Nishi Y, Ihoriya C, Kadoya H, Sasaki T, Kashihara N, Wu CF, Chang FC, Chen YT, Chou YH, Duffield J, Lin SL, Rocca C, Rocca C, Gregorini M, Corradetti V, Valsania T, Bedino G, Bosio F, Pattonieri EF, Esposito P, Sepe V, Libetta C, Rampino T, Dal Canton A, Bedino G, Gregorini M, Corradetti V, Rocca C, Pattonieri EF, Valsania T, Bosio F, Esposito P, Sepe V, Libetta C, Rampino T, Dal Canton A, Omori H, Kawada N, Inoue K, Ueda Y, Yamamoto R, Matsui I, Kaimori J, Takabatake Y, Moriyama T, Isaka Y, Rakugi H, Wasilewska A, Taranta-Janusz K, Deebek W, Kuroczycka-Saniutycz E, Lee AS, Lee AS, Lee JE, Jung YJ, Kang KP, Lee S, Kim W, Arfian N, Emoto N, Yagi K, Nakayama K, Hartopo AB, Nugrahaningsih DA, Yanagisawa M, Hirata KI, Munoz-Felix JM, Lopez-Novoa JM, Martinez-Salgado C, Oujo B, Munoz-Felix JM, Arevalo M, Bernabeu C, Perez-Barriocanal F, Lopez-Novoa JM, Jesper K, Nathalie V, Pierre G, Yi Chun DX, Alexandre H, Eric R, Iyoda M, Shibata T, Matsumoto K, Shindo-Hirai Y, Kuno Y, Wada Y, Akizawa T, Schwartz I, Schwartz D, Prot Bertoye C, Prot Bertoye C, Terryn S, Claver J, Beghdadi WB, Monteiro R, Blank U, Devuyst O, Daugas E, Van Beneden K, Geers C, Pauwels M, Mannaerts I, Van den Branden C, Van Grunsven LA, Seckin I, Pekpak M, Uzunalan M, Uruluer B, Kokturk S, Ozturk Z, Sonmez H, Yaprak E, Furuno Y, Tsutsui M, Morishita T, Shimokawa H, Otsuji Y, Yanagihara N, Kabashima N, Ryota S, Kanegae K, Miyamoto T, Nakamata J, Ishimatsu N, Tamura M, Nakagawa T, Nakagawa T, Ichikawa K, Miyamoto M, Takabayashi D, Yamazaki H, Kakeshita K, Koike T, Kagitani S, Tomoda F, Hamashima T, Ishii Y, Inoue H, Sasahara M, El Machhour F, Kerroch M, Mesnard L, Chatziantoniou C, Dussaule JC, Inui K, Sasai F, Maruta Y, Nishiwaki H, Kawashima E, Inoue Y, Yoshimura A, Matsumoto K, Matsumoto K, Iyoda M, Shibata T, Wada Y, Shindo-Hirai Y, Kuno Y, Akizawa T, Musacchio E, Priante G, Valvason C, Sartori L, Baggio B, Kim JH, Gross O, Diana R, Gry DH, Asimal B, Johanna T, Imke SE, Lydia W, Gerhard-Anton M, Hassan D, Cano JL, Griera M, Olmos G, Martin P, Cortes MA, Lopez-Ongil S, Rodriguez-Puyol D, DE Frutos S, Gonzalez M, DE Frutos S, Cano JL, Luengo A, Martin P, Rodriguez-Puyol M, Calleros L, Lupica R, Lacquaniti A, Donato V, Maggio R, Mastroeni C, Lucisano S, Cernaro V, Fazio MR, Quartarone A, Buemi M, Kacik M, Goedicke S, Eggert H, Hoyer JD, Wurm S, Wurm S, Steege A, Banas M, Kurtz A, Banas B, Lasagni L, Lazzeri E, Peired A, Angelotti ML, Ronconi E, Romoli S, Romagnani P, Schaefer I, Teng B, Worthmann K, Haller H, Schiffer M, Prattichizzo C, Netti GS, Rocchetti MT, Cormio L, Carrieri G, Stallone G, Grandaliano G, Ranieri E, Gesualdo L, Kucher A, Smirnov A, Parastayeva M, Beresneva O, Kayukov I, Zubina I, Ivanova G, Abed A, Schlekenbach L, Foglia B, Chatziantoniou C, Kwak B, Chadjichristos C, Queisser N, Schupp N, Brand S, Himer L, Himer L, Szebeni B, Sziksz E, Saijo S, Kis E, Prokai A, Banki NF, Fekete A, Tulassay T, Vannay A, Hegner B, Schaub T, Lange C, Dragun D, Klinkhammer BM, Rafael K, Monika M, Anna M, Van Roeyen C, Boor P, Eva Bettina B, Simon O, Esther S, Floege J, Kunter U, Hegner B, Janke D, Schaub T, Lange C, Jankowski J, Dragun D, Hayashi M, Takamatsu I, Horimai C, Yoshida T, Seno DI Marco G, Koenig M, Stock C, Reiermann S, Amler S, Koehler G, Fobker M, Buck F, Pavenstaedt H, Lang D, Brand M, Plotnikov E, Morosanova M, Pevzner I, Zorova L, Pulkova N, Zorov D, Wornle M, Ribeiro A, Belling F, Merkle M, Nakazawa D, Nishio S, Shibasaki S, Tomaru U, Akihiro I, Kobayashi I, Imanishi Y, Kurajoh M, Nagata Y, Yamagata M, Emoto M, Michigami T, Ishimura E, Inaba M, Nishi Y, Satoh M, Sasaki T, Kashihara N, Wu CC, Lu KC, Chen JS, Chu P, Lin YF, Eller K, Schroll A, Banas M, Kirsch A, Huber J, Weiss G, Theurl I, Rosenkranz AR, Zawada A, Rogacev K, Achenbach M, Fliser D, Held G, Heine GH, Miyamoto Y, Iwao Y, Watanabe H, Kadowaki D, Ishima Y, Chuang VTG, Sato K, Otagiri M, Maruyama T, Ueda Y, Iwatani H, Isaka Y, Watanabe H, Honda D, Miyamoto Y, Noguchi T, Kadowaki D, Ishima Y, Tanaka M, Tanaka H, Fukagawa M, Otagiri M, Maruyama T, Wornle M, Ribeiro A, Pircher J, Koppel S, Mannell H, Krotz F, Merkle M, Virzi GM, Bolin C, Cruz D, Scalzotto E, De Cal M, Vescovo G, Ronco C, Virzi GM, Bolin C, Cruz D, Scalzotto E, De Cal M, Vescovo G, Ronco C, Grobmayr R, Lech M, Ryu M, Anders HJ, Aoshima Y, Mizobuchi M, Ogata H, Kumata C, Nakazawa A, Kondo F, Ono N, Koiwa F, Kinugasa E, Akizawa T, Freisinger W, Lale N, Lampert A, Ditting T, Heinlein S, Schmieder RE, Veelken R, Nave H, Perthel R, Suntharalingam M, Bode-Boger S, Beutel G, Kielstein J, Rodrigues-Diez R, Rodrigues-Diez R, Rayego-Mateos S, Lavoz C, Stark Aroeira LG, Orejudo M, Alique M, Ortiz A, Egido J, Ruiz-Ortega M, Oskar W, Rusan C, Schaub T, Hegner B, Dragun D, Padberg JS, Wiesinger A, Brand M, Seno DI Marco G, Reuter S, Grabner A, Kentrup D, Lukasz A, Oberleithner H, Pavenstadt H, Kumpers P, Eberhardt HU, Skerka C, Chen Q, Hallstroem T, Hartmann A, Kemper MJ, Zipfel PF, N'gome-Sendeyo K, Fan QF, Zhang SY, Pawlak A, Sahali D, Wornle M, Ribeiro A, Merkle M, Toblli J, Toblli J, Cao G, Giani JF, Dominici FP, Kim JS, Yang JW, Kim MK, Han BG, Choi SO. Experimental pathology. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sanjani MS, Asano S, Dick G, Teng B, Tilley S, Ledent C, Mustafa SJ. Interactions between A
2A
adenosine receptor, hydrogen peroxide, and K
ATP
channel in coronary reactive hyperemia. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.863.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Gregory Dick
- Exercise PhysiologyWest Virginia UniversityMorgantownWV
| | - Bunyen Teng
- Physiology & PharmacologyWest Virginia UniversityMorgantownWV
| | | | | | - S Jamal Mustafa
- Physiology & PharmacologyWest Virginia UniversityMorgantownWV
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Sanjani MS, Teng B, Krahn T, Tilley S, Ledent C, Mustafa SJ. Contributions of A2A and A2B adenosine receptors in coronary flow responses in relation to the KATP channel using A2B and A2A/2B double-knockout mice. Am J Physiol Heart Circ Physiol 2011; 301:H2322-33. [PMID: 21949117 DOI: 10.1152/ajpheart.00052.2011] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Adenosine plays a role in physiological and pathological conditions, and A(2) adenosine receptor (AR) expression is modified in many cardiovascular disorders. In this study, we elucidated the role of the A(2B)AR and its relationship to the A(2A)AR in coronary flow (CF) changes using A(2B) single-knockout (KO) and A(2A/2B) double-KO (DKO) mice in a Langendorff setup. We used two approaches: 1) selective and nonselective AR agonists and antagonists and 2) A(2A)KO and A(2B)KO and A(2A/2B)DKO mice. BAY 60-6583 (a selective A(2B) agonist) had no effect on CF in A(2B)KO mice, whereas it significantly increased CF in wild-type (WT) mice (maximum of 23.3 ± 9 ml·min(-1)·g(-1)). 5'-N-ethylcarboxamido adenosine (NECA; a nonselective AR agonist) increased CF in A(2B)KO mice (maximum of 34.6 ± 4.7 ml·min(-1)·g(-1)) to a significantly higher degree compared with WT mice (maximum of 23.1 ± 2.1 ml·min(-1)·g(-1)). Also, CGS-21680 (a selective A(2A) agonist) increased CF in A(2B)KO mice (maximum of 29 ± 1.9 ml·min(-1)·g(-1)) to a significantly higher degree compared with WT mice (maximum of 25.1 ± 2.3 ml·min(-1)·g(-1)). SCH-58261 (an A(2A)-selective antagonist) inhibited the NECA-induced increase in CF to a significantly higher degree in A(2B)KO mice (19.3 ± 1.6 vs. 0.5 ± 0.4 ml·min(-1)·g(-1)) compared with WT mice (19 ± 3.5 vs. 3.6 ± 0.5 ml·min(-1)·g(-1)). NECA did not induce any increase in CF in A(2A/2B)DKO mice, whereas a significant increase was observed in WT mice (maximum of 23.1 ± 2.1 ml·min(-1)·g(-1)). Furthermore, the mitochondrial ATP-sensitive K(+) (K(ATP)) channel blocker 5-hydroxydecanoate had no effect on the NECA-induced increase in CF in WT mice, whereas the NECA-induced increase in CF in WT (17.6 ± 2 ml·min(-1)·g(-1)), A(2A)KO (12.5 ± 2.3 ml·min(-1)·g(-1)), and A(2B)KO (16.2 ± 0.8 ml·min(-1)·g(-1)) mice was significantly blunted by the K(ATP) channel blocker glibenclamide (to 0.7 ± 0.7, 2.3 ± 1.1, and 0.9 ± 0.4 ml·min(-1)·g(-1), respectively). Also, the CGS-21680-induced (22 ± 2.3 ml·min(-1)·g(-1)) and BAY 60-6583-induced (16.4 ± 1.60 ml·min(-1)·g(-1)) increase in CF in WT mice was significantly blunted by glibenclamide (to 1.2 ± 0.4 and 1.8 ± 1.2 ml·min(-1)·g(-1), respectively). In conclusion, this is the first evidence supporting the compensatory upregulation of A(2A)ARs in A(2B)KO mice and demonstrates that both A(2A)ARs and A(2B)ARs induce CF changes through K(ATP) channels. These results identify AR-mediated CF responses that may lead to better therapeutic approaches for the treatment of cardiovascular disorders.
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Affiliation(s)
- Maryam Sharifi Sanjani
- Department of Physiology and Pharmacology, Center for Cardiovascular Respiratory Sciences, West Virginia University, Morgantown, USA
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Abstract
Adenosine-induced coronary vasodilation is predominantly A2A adenosine receptor (AR)-mediated, whereas A1 AR is known to negatively modulate the coronary flow (CF). However, the coronary responses to adenosine in hyperlipidemia and atherosclerosis are not well understood. Using hyperlipidemic/atherosclerotic apolipoprotein E (APOE)–knockout mice, CF responses to nonspecific adenosine agonist (5′-N-ethylcarboxamide adenosine, NECA) and specific adenosine agonists (2-chloro-N6-cyclopentyl-adenosine [CCPA, A1 AR-specific] and CGS-21680, A2A AR-specific) were assessed using isolated Langendorff hearts. Western blot analysis was performed in the aorta from APOE and their wild-type (WT) control (C57BL/6J). Baseline CF (expressed as mL/min/g heart weight) was not different among WT (13.23 ± 3.58), APOE (13.22 ± 2.78), and APOE on high-fat diet (HFD) for 12 weeks (APOE-HFD, 12.37 ± 4.76). Concentration response curves induced by CGS-21680 were significantly shifted to the left in APOE and APOE-HFD when compared with WT. CCPA induced an increase in CF only at 10−6 M in all groups and the effect was reversed by the addition of a selective A2A AR antagonist, SCH-58261 (10−6 M), and a significant decrease in CF from baseline was observed. Western blot analysis showed a significant upregulation of A2A AR in the aorta from APOE and APOE-HFD. This study provides the first evidence that CF responses to A2A AR stimulation were upregulated in hyperlipidemic/atherosclerotic animals. The speculation is that the use of A2A AR-specific agonist for myocardial perfusion imaging (such as regadenoson) could overestimate the coronary reserve in coronary artery disease patients.
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Affiliation(s)
- Bunyen Teng
- Department of Physiology and Pharmacology and Center for Cardiovascular and Respiratory Sciences, West Virginia University, Morgantown, WV, USA
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Negoro H, Kobayashi H, Teng B, Schafer I, Starker G, Miller E, Mao Y, Park JK, Haller H, Schiffer M, Lu Y, Zhong F, Zhou Q, Hao X, Li C, Guo S, Wang W, Chen N, Okano K, Jinnai H, Iwasaki T, Miwa N, Kimata N, Akiba T, Nitta K, Chen CA, Cheng YC, Hwang JC, Chang JMC, Guh JY, Chen HC, Garcia-Sanchez O, Lopez-Novoa JM, Lopez-Hernandez FJ, Hirai Y, Iyoda M, Shibata T, Kuno Y, Akizawa T, Shimizu H, Bolati D, Niwa T, Kim YK, Nam SA, Kim WY, Park SH, Song HC, Choi EJ, Kim J, Sirolli V, Giardinelli A, Morabito C, Di Cesare M, Di Pietro N, Di Liberato L, Amoroso L, Mariggio MA, Formoso G, Pandolfi A, Bonomini M, Shalhoub V, Shatzen E, Ward S, Damore M, Boedigheimer M, Campbell M, Pan Z, Davis J, Henley C, Richards W, Yoshida T, Yamashita M, Hayashi M, Bodor C, Nemeth A, Berzsenyi V, Vegh B, Sebe A, Rosivall L, Koken T, Hunkerler Z, Kahraman A, Verzola D, Villaggio B, Tosetti F, Cappuccino L, Gianiorio F, Simonato A, Parodi E, Garibotto G, Chai Y, Liu J, Sun B, Zhao X, Qian J, Xing C. Cell signalling. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kang LS, Chen B, Reyes RA, Leblanc AJ, Teng B, Mustafa SJ, Muller-Delp JM. Aging and estrogen alter endothelial reactivity to reactive oxygen species in coronary arterioles. Am J Physiol Heart Circ Physiol 2011; 300:H2105-15. [PMID: 21441309 DOI: 10.1152/ajpheart.00349.2010] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Endothelium-dependent, nitric oxide (NO)-mediated vasodilation can be impaired by reactive oxygen species (ROS), and this deleterious effect of ROS on NO availability may increase with aging. Endothelial function declines rapidly after menopause, possibly because of loss of circulating estrogen and its antioxidant effects. The purpose of the current study was to determine the role of O(2)(-) and H(2)O(2) in regulating flow-induced dilation in coronary arterioles of young (6-mo) and aged (24-mo) intact, ovariectomized (OVX), or OVX + estrogen-treated (OVE) female Fischer 344 rats. Both aging and OVX reduced flow-induced NO production, whereas flow-induced H(2)O(2) production was not altered by age or estrogen status. Flow-induced vasodilation was evaluated before and after treatment with the superoxide dismutase (SOD) mimetic Tempol (100 μM) or the H(2)O(2) scavenger catalase (100 U/ml). Removal of H(2)O(2) with catalase reduced flow-induced dilation in all groups, whereas Tempol diminished vasodilation in intact and OVE, but not OVX, rats. Immunoblot analysis revealed elevated nitrotyrosine with aging and OVX. In young rats, OVX reduced SOD protein while OVE increased SOD in aged rats; catalase protein did not differ in any group. Collectively, these studies suggest that O(2)(-) and H(2)O(2) are critical components of flow-induced vasodilation in coronary arterioles from female rats; however, a chronic deficiency of O(2)(-) buffering by SOD contributes to impaired flow-induced dilation with aging and loss of estrogen. Furthermore, these data indicate that estrogen replacement restores O(2)(-) homeostasis and flow-induced dilation of coronary arterioles, even at an advanced age.
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Affiliation(s)
- Lori S Kang
- Dept. of Physiology and Functional Genomics, Univ. of Florida, 1600 SW Archer Rd., P.O. Box 100274, Gainesville, FL 32610, USA
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Teng B, Roush K, Mustafa SJ. A
2A
Adenosine Receptor‐Mediated Coronary Flow Increase Is Enhanced in Hyperlipidemic Mice. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.1034.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bunyen Teng
- Dept. of Physiology & PharmacologyCenter for Cardiovascular and Respiratory SciencesWest Virginia UniversityMorgantownWV
| | - Kevin Roush
- Dept. of Physiology & PharmacologyCenter for Cardiovascular and Respiratory SciencesWest Virginia UniversityMorgantownWV
| | - S. Jamal Mustafa
- Dept. of Physiology & PharmacologyCenter for Cardiovascular and Respiratory SciencesWest Virginia UniversityMorgantownWV
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Heffler M, Teng B, Cheney R, Miller A, Dunn KMB. Hyaluronan and Associated Receptor Expression in Human Colorectal Cancer: Immunohistochemical Analysis and Quantification. J Surg Res 2010. [DOI: 10.1016/j.jss.2009.11.454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ansari HR, Teng B, Nadeem A, Roush KP, Martin KH, Schnermann J, Mustafa SJ. A(1) adenosine receptor-mediated PKC and p42/p44 MAPK signaling in mouse coronary artery smooth muscle cells. Am J Physiol Heart Circ Physiol 2009; 297:H1032-9. [PMID: 19592614 DOI: 10.1152/ajpheart.00374.2009] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The A(1) adenosine receptor (A(1)AR) is coupled to G(i)/G(o) proteins, but the downstream signaling pathways in smooth muscle cells are unclear. This study was performed in coronary artery smooth muscle cells (CASMCs) isolated from the mouse heart [A(1)AR wild type (A(1)WT) and A(1)AR knockout (A(1)KO)] to delineate A(1)AR signaling through the PKC pathway. In A(1)WT cells, treatment with (2S)-N(6)-(2-endo-norbornyl)adenosine (ENBA; 10(-5)M) increased A(1)AR expression by 150%, which was inhibited significantly by the A(1)AR antagonist 1,3-dipropyl-8-cyclopentylxanthine (10(-6)M), but not in A(1)KO CASMCs. PKC isoforms were identified by Western blot analysis in the cytosolic and membrane fractions of cell homogenates of CASMCs. In A(1)WT and A(1)KO cells, significant levels of basal PKC-alpha were detected in the cytosolic fraction. Treatment with the A(1)AR agonist ENBA (10(-5)M) translocated PKC-alpha from the cytosolic to membrane fraction significantly in A(1)WT but not A(1)KO cells. Phospholipase C isoforms (betaI, betaIII, and gamma(1)) were analyzed using specific antibodies where ENBA treatment led to the increased expression of PLC-betaIII in A(1)WT CASMCs while having no effect in A(1)KO CASMCs. In A(1)WT cells, ENBA increased PKC-alpha expression and p42/p44 MAPK (ERK1/2) phospohorylation by 135% and 145%, respectively. These effects of ENBA were blocked by Gö-6976 (PKC-alpha inhibitor) and PD-98059 (p42/p44 MAPK inhibitor). We conclude that A(1)AR stimulation by ENBA activates the PKC-alpha signaling pathway, leading to p42/p44 MAPK phosphorylation in CASMCs.
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Affiliation(s)
- Habib R Ansari
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Robert C. Byrd Health Science Center, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
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Sharifi Sanjani M, Tilley S, Teng B, Mustafa SJ. Understanding the role of A2B adenosine receptor using knockout in the regulation of coronary flow. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.1032.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Bunyen Teng
- Physiology and PharmacologyWest Virginia UniversityMorgantownWV
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Abstract
Adenosine is an autacoid that plays a critical role in regulating cardiac function, including heart rate, contractility, and coronary flow. In this chapter, current knowledge of the functions and mechanisms of action of coronary flow regulation and electrophysiology will be discussed. Currently, there are four known adenosine receptor (AR) subtypes, namely A(1), A(2A), A(2B), and A(3). All four subtypes are known to regulate coronary flow. In general, A(2A)AR is the predominant receptor subtype responsible for coronary blood flow regulation, which dilates coronary arteries in both an endothelial-dependent and -independent manner. The roles of other ARs and their mechanisms of action will also be discussed. The increasing popularity of gene-modified models with targeted deletion or overexpression of a single AR subtype has helped to elucidate the roles of each receptor subtype. Combining pharmacologic tools with targeted gene deletion of individual AR subtypes has proven invaluable for discriminating the vascular effects unique to the activation of each AR subtype. Adenosine exerts its cardiac electrophysiologic effects mainly through the activation of A(1)AR. This receptor mediates direct as well as indirect effects of adenosine (i.e., anti-beta-adrenergic effects). In supraventricular tissues (atrial myocytes, sinuatrial node and atriovetricular node), adenosine exerts both direct and indirect effects, while it exerts only indirect effects in the ventricle. Adenosine exerts a negative chronotropic effect by suppressing the automaticity of cardiac pacemakers, and a negative dromotropic effect through inhibition of AV-nodal conduction. These effects of adenosine constitute the rationale for its use as a diagnostic and therapeutic agent. In recent years, efforts have been made to develop A(1)R-selective agonists as drug candidates that do not induce vasodilation, which is considered an undesirable effect in the clinical setting.
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Affiliation(s)
- S Jamal Mustafa
- Department of Physiology and Pharmacology, School of Medicine, West Virginia University, Morgantown, WV 26505-9229, USA.
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Teng B, Ledent C, Mustafa SJ. Up-regulation of A 2B adenosine receptor in A 2A adenosine receptor knockout mouse coronary artery. J Mol Cell Cardiol 2008; 44:905-14. [PMID: 18423660 DOI: 10.1016/j.yjmcc.2008.03.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 03/03/2008] [Accepted: 03/03/2008] [Indexed: 11/26/2022]
Abstract
In this study, we looked into possible compensatory changes of other adenosine receptors (ARs) in A(2A) genetic knockout mice (A2AKO) as well as the functional role of nitric oxide (NO) in A(2A) AR-mediated vasodilation. Gene expression of ARs from coronary arteries of A(2A) AR wild type mice (A2AWT) and A2AKO was studied using real-time PCR. Functional studies were carried out in isolated heart and isolated coronary artery preparations. A(2B) AR was found to be 4.5 fold higher in A2AKO than in A2AWT, while A(2A) AR expression was absent in A2AKO. There was no difference in A(1) and A(3) ARs between WT and KO animals. The concentration-relaxation curve for adenosine-5'-N-ethylcarboxamide (NECA, non-selective AR agonist) in isolated coronary arterial rings in A2AKO was shifted to the left when compared to A2AWT. The concentration-response curve for A(2B) selective agonist (BAY 60-6583) was also shifted to the left in A2AKO hearts. L-NAME, a non-specific NO synthase inhibitor, did not affect baseline coronary flow (CF) until the concentration reached 10 microM in A2AWT (76.32+/-11.35% from baseline, n=5). In A2AKO, the CF decreased significantly by L-NAME only at a higher concentration (100 microM, 93.32+/-5.8% from baseline, n=5). L-NMA (1 microM, n=4), another non-specific NO synthase inhibitor, also demonstrated similar results in decreasing CF (59.66+/-3.23% from baseline in A2AWT, while 81.76+/-8.91% in A2AKO). It was further demonstrated that the increase in CF by 100 microM NECA was significantly blunted with 10 microM L-NAME (377.08+/-25.23% to 305.41+/-30.73%, n=9) in A2AWT but not in A2AKO (153.66+/-22.7% to 143.88+/-36.65%, n=5). Similar results were also found using 50 nM of CGS-21680 instead of NECA in A2AWT (346+/-22.85 to 277+/-31.39, n=6). No change in CF to CGS-21680 was noted in A(2A)AKO. Our data demonstrate, for the first time, that coronary A(2B) AR was up-regulated in mice deficient in A(2A) AR. We also provide direct evidence supporting a role for NO in A(2A) AR-mediated coronary vasodilation. The data further support the role for A(2A) AR in the regulation of basal coronary tone through the release of NO.
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Affiliation(s)
- Bunyen Teng
- Department of Physiology and Pharmacology, West Virginia University Health Sciences Center, Morgantown, WV 26506-9104, USA
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Ansari HR, Teng B, Nadeem A, Schnermann J, Mustafa SJ. A1 adenosine receptor‐activated protein kinase C signaling in A1 knock‐out mice coronary artery smooth muscle cells. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.1152.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Habib R. Ansari
- Physiology & PharmacologyCenter for Interdisciplinary Research in Cardiovascular SciencesWest Virginia UniversityMorgantownWV
| | - Bunyen Teng
- Physiology & PharmacologyCenter for Interdisciplinary Research in Cardiovascular SciencesWest Virginia UniversityMorgantownWV
| | - Ahmed Nadeem
- Physiology & PharmacologyCenter for Interdisciplinary Research in Cardiovascular SciencesWest Virginia UniversityMorgantownWV
| | | | - S. Jamal Mustafa
- Physiology & PharmacologyCenter for Interdisciplinary Research in Cardiovascular SciencesWest Virginia UniversityMorgantownWV
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Teng B, Mastafa SJ. Cardiovascular Effects of Adenosine in Hypercholesterolemia. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.924.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bunyen Teng
- Physiology & PharmacologyCenter for Interdisciplinary Research in Cardiovascular SciencesWest Virginia UniversityMorgantownWV
| | - S. Jamal Mastafa
- Physiology & PharmacologyCenter for Interdisciplinary Research in Cardiovascular SciencesWest Virginia UniversityMorgantownWV
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Li CH, Zhang Q, Teng B, Mustafa SJ, Huang JY, Yu HG. Src tyrosine kinase alters gating of hyperpolarization-activated HCN4 pacemaker channel through Tyr531. Am J Physiol Cell Physiol 2008; 294:C355-62. [PMID: 17977941 PMCID: PMC2784909 DOI: 10.1152/ajpcell.00236.2007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We recently discovered that the constitutively active Src tyrosine kinase can enhance hyperpolarization-activated, cyclic nucleotide-gated (HCN) 4 channel activity by binding to the channel protein. To investigate the mechanism of modulation by Src of HCN channels, we studied the effects of a selective inhibitor of Src tyrosine kinase, 4-amino-5-(4-chlorophenyl)-7-(t-butyl)pyrazolo[3,4-d]pyrimidine (PP2), on HCN4 and its mutant channels expressed in HEK 293 cells by using a whole cell patch-clamp technique. We found that PP2 can inhibit HCN4 currents by negatively shifting the voltage dependence of channel activation, decreasing the whole cell channel conductance, and slowing activation and deactivation kinetics. Screening putative tyrosine residues subject to phosphorylation yielded two candidates: Tyr(531) and Tyr(554). Substituting HCN4-Tyr(531) with phenylalanine largely abolished the effects of PP2 on HCN4 channels. Replacing HCN4-Tyr(554) with phenylalanine did not abolish the effects of PP2 on voltage-dependent activation but did eliminate PP2-induced slowing of channel kinetics. The inhibitory effects of HCN channels associated with reduced Src tyrosine activity is confirmed in HL-1 cardiomyocytes. Finally, we found that PP2 can decrease the heart rate in a mouse model. These results demonstrate that Src tyrosine kinase enhances HCN4 currents by shifting their activation to more positive potentials and increasing the whole cell channel conductance as well as speeding the channel kinetics. The tyrosine residue that mediates most of Src's actions on HCN4 channels is Tyr(531).
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Affiliation(s)
- Chen-Hong Li
- Department of Physiology and Pharmacology, Center for Interdisciplinary Research in Cardiovascular Sciences, West Virginia University School of Medicine, Morgantown, WV 26506, USA
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Sun ZH, Tan ZL, Liu SM, Tayo GO, Lin B, Teng B, Tang SX, Wang WJ, Liao YP, Pan YF, Wang JR, Zhao XG, Hu Y. Effects of dietary methionine and lysine sources on nutrient digestion, nitrogen utilization, and duodenal amino acid flow in growing goats. J Anim Sci 2007; 85:3340-7. [PMID: 17709770 DOI: 10.2527/jas.2006-718] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study investigated the effects of supplementation of various sources of Met and Lys on nutrient digestion, N utilization, and duodenal AA flows in growing goats. Four 4-mo-old Liuyang Black wether goats were used in a 4 x 4 Latin square experiment and were assigned to 4 dietary treatments: (1) control, (2) control + lipid-coated Met-Zn chelate and Lys-Mn chelate (PML), (3) control + Met-Zn chelate and Lys-Mn chelate (CML), and (4) control + dl-Met, l-Lys-HCl, ZnSO(4).7H(2)O, and MnSO(4).H(2)O (FML). Compared with control, PML reduced (P < 0.05) ruminal NH(3) concentration, urinary N excretion, and plasma urea N concentration and increased (P < 0.05) the activity of ruminal endo-1,4-beta-d-glucanase and beta-glucosidase, the duodenal flow of N, N retention (g/d as well as % of absorbed N), the duodenal flows of Met, Lys, His, Val, and total essential AA, and plasma concentrations of Lys, Val, Phe, and total essential AA. Supplementing Zn-Met and Mn-Lys chelates had similar (P > 0.05) but lesser effects on these measures compared with PML, and the effects on most of the measures were not statistically significant (P > 0.05) when compared with control. Supplementing free-form Met and Lys had no effects compared with control (P > 0.05). The results indicate that lipid coating and chelating of AA provide a protection, and to a lesser extent by only chelating, of the AA from microbial degradation in the rumen and possibly has effects on rumen fermentation, which increases MP supply. This technology could improve productive performance and be of potential benefit to ruminant production if cost-effective products are developed.
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Affiliation(s)
- Z H Sun
- Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan 410125, China
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Teng B, Ledent C, Mustafa SJ. A
2A
Adenosine Receptor‐Mediated Nitric Oxide Release Was Blunted in Knockout Mouse Heart. FASEB J 2007. [DOI: 10.1096/fasebj.21.6.a1381-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bunyen Teng
- Physiology & PharmacologyWest Virginia UniversityP.O. Box9229, 3051 HSC North, One Medical Center DriveMorgantownWV26506
| | - Catherine Ledent
- Universite Libre de BruxellesCampus Erasme808 route de Lennik, B‐1070 BruxellesBrusselsBelgium
| | - S. Jamal Mustafa
- Physiology & PharmacologyWest Virginia UniversityP.O. Box9229, 3051 HSC North, One Medical Center DriveMorgantownWV26506
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Morrison RR, Teng B, Oldenburg PJ, Katwa LC, Schnermann JB, Mustafa SJ. Effects of targeted deletion of A1 adenosine receptors on postischemic cardiac function and expression of adenosine receptor subtypes. Am J Physiol Heart Circ Physiol 2006; 291:H1875-82. [PMID: 16679400 DOI: 10.1152/ajpheart.00158.2005] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To examine ischemic tolerance in the absence of A(1) adenosine receptors (A(1)ARs), isolated wild-type (WT) and A(1)AR knockout (A(1)KO) murine hearts underwent global ischemia-reperfusion, and injury was measured in terms of functional recovery and efflux of lactate dehydrogenase (LDH). Hearts were analyzed by real-time RT-PCR both at baseline and at intervals during ischemia-reperfusion to determine whether compensatory expression of other adenosine receptor subtypes occurs with either A(1)AR deletion and/or ischemia-reperfusion. A(1)KO hearts had higher baseline coronary flow (CF) and left ventricular developed pressure (LVDP) than WT hearts, whereas heart rate was unchanged by A(1)AR deletion. After 20 min of ischemia, CF was attenuated in A(1)KO compared with WT hearts, and this reduction persisted throughout reperfusion. Final recovery of LVDP was decreased in A(1)KO hearts (54.4 +/- 5.1 vs. WT 81.1 +/- 3.4% preischemic baseline) and correlated with higher diastolic pressure during reperfusion. Postischemic efflux of LDH was greater in A(1)KO compared with WT hearts. Real-time RT-PCR demonstrated the absence of A(1)AR transcript in A(1)KO hearts, and the message for A(2A), A(2B), and A(3) adenosine receptors was similar in uninstrumented A(1)KO and WT hearts. Ischemia-reperfusion increased A(2B) mRNA expression 2.5-fold in both WT and A(1)KO hearts without changing A(1) or A(3) expression. In WT hearts, ischemia transiently doubled A(2A) mRNA, which returned to preischemic level upon reperfusion, a pattern not observed in A(1)KO hearts. Together, these data affirm the cardioprotective role of A(1)ARs and suggest that induced expression of other adenosine receptor subtypes may participate in the response to ischemia-reperfusion in isolated murine hearts.
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MESH Headings
- Animals
- Coronary Vessels/physiology
- Female
- Gene Deletion
- Gene Expression Regulation/physiology
- Lactate Dehydrogenases/metabolism
- Male
- Mice
- Mice, Knockout
- Myocardial Contraction/physiology
- Myocardial Ischemia/genetics
- Myocardial Ischemia/metabolism
- Myocardium/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, Adenosine A1/genetics
- Receptor, Adenosine A1/metabolism
- Receptor, Adenosine A2A/genetics
- Receptor, Adenosine A2A/metabolism
- Receptor, Adenosine A2B/genetics
- Receptor, Adenosine A2B/metabolism
- Receptor, Adenosine A3/genetics
- Receptor, Adenosine A3/metabolism
- Regional Blood Flow/physiology
- Reperfusion Injury/physiopathology
- Vasodilation/physiology
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Affiliation(s)
- R Ray Morrison
- Division of Critical Care Medicine, St. Jude Children's Research Hospital, 332 N. Lauderdale St., MS 734, Memphis, TN 38105, USA.
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