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Chang YL, Chou CH, Li YF, Huang LC, Kao Y, Hueng DY, Tsai CK. Antiproliferative and apoptotic effects of telmisartan in human glioma cells. Cancer Cell Int 2023; 23:111. [PMID: 37291545 DOI: 10.1186/s12935-023-02963-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/05/2023] [Indexed: 06/10/2023] Open
Abstract
Glioblastoma is the most common primary central nervous system tumor in adults. Angiotensin II receptor blockers (ARBs) are broadly applied to treat hypertension. Moreover, research has revealed that ARBs have the capacity to suppress the growth of several cancer types. In this study, we assessed the effects of three ARBs with the ability to cross the blood brain barrier (telmisartan, valsartan and fimasartan) on cell proliferation in three glioblastoma multiforme (GBM) cell lines. Telmisartan markedly suppressed the proliferation, migration, and invasion of these three GBM cell lines. Microarray data analysis revealed that telmisartan regulates DNA replication, mismatch repair, and the cell cycle pathway in GBM cells. Furthermore, telmisartan induced G0/G1 phase arrest and apoptosis. The bioinformatic analysis and western blotting results provide evidence that SOX9 is a downstream target of telmisartan. Telmisartan also suppressed tumor growth in vivo in an orthotopic transplant mouse model. Therefore, telmisartan is a potential treatment for human GBM.
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Affiliation(s)
- Yung-Lung Chang
- Department of Biochemistry, National Defense Medical Center, Taipei, 11490, Taiwan
| | - Chung-Hsing Chou
- Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Gong Road, Taipei, 11490, Taiwan
| | - Yao-Feng Li
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, 11490, Taiwan
| | - Li-Chun Huang
- Department of Biochemistry, National Defense Medical Center, Taipei, 11490, Taiwan
| | - Ying Kao
- Division of Neurosurgery, Department of Surgery, Taipei City Hospital Zhongxing Branch, Taipei, Taiwan
| | - Dueng-Yuan Hueng
- Department of Neurological Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, 11490, Taiwan
| | - Chia-Kuang Tsai
- Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Gong Road, Taipei, 11490, Taiwan.
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2
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Zhang X, Wang Y, Zheng Y, Yuan J, Tong J, Xu J, Li Q, Li P, Jiang S, Wang Z, Chai F, Li X. Effect of ACE, ACE2 and CYP11B2 gene polymorphisms and noise on essential hypertension among steelworkers in China: a case-control study. BMC Med Genomics 2022; 15:22. [PMID: 35130889 PMCID: PMC8822663 DOI: 10.1186/s12920-022-01177-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 02/02/2022] [Indexed: 11/10/2022] Open
Abstract
Background Previous studies on the relationship between ACE I/D, ACE2 G8790A and CYP11B2-344T/C gene polymorphisms and essential hypertension (EH) were inconsistent. Moreover, few studies have reported the combined effect of these gene polymorphisms and noise exposure on EH. The purpose of this study was to explore the combined and separate effects of ACE I/D, ACE2 G8790A and CYP11B2-344T/C gene polymorphisms and noise on EH among steelworkers.
Methods A case–control study was conducted on 725 male workers between March 2014 and July 2014 in the Tangsteel Company, China. The noise exposure of the workers were measured. Logistic regression and crossover analysis were used to analyse the effects of the interactions on the EH among steelworkers. GMDR was used to determine the best combination model of gene–noise interactions. Results Multivariate logistic regression showed that noise exposure increased the odds of EH, and the OR is 1.52 (95% CI 1.04–2.22). The risk of having EH for ACE I/D DD genotype carriers was 1.99 times that for II genotype carriers (95% CI 1.14–3.51). There was a negative additive interaction between ACE2 G8790A and CYP11B2-344T/C on EH (U3 = − 2.221, P = 0.026, and S = 0.128) and a positive multiplicative interaction between ACE I/D and CYP11B2-344T/C on essential hypertension (P = 0.041). In addition, there was no significant gene–noise interaction model through the GMDR method after adjusting the confounders. Conclusions The ACE DD genotype may make men susceptible to EH. Simultaneously carrying the DD genotype of ACE I/D and the TC genotype of CYP11B2-344T/C increased the risk of EH. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-022-01177-0.
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Affiliation(s)
- Xiaohong Zhang
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Ying Wang
- Department of Endocrinology, North China University of Science and Technology Affiliated Hospital, Tangshan, People's Republic of China
| | - Yao Zheng
- Department of Public Health, North China University of Science and Technology Affiliated Hospital, Tangshan, People's Republic of China
| | - Juxiang Yuan
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Junwang Tong
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China.
| | - Jingya Xu
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Qinglin Li
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Peishuai Li
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Shoufang Jiang
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Zhaoyang Wang
- Tangshan Hongci Hospital, Tangshan, People's Republic of China
| | - Feng Chai
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
| | - Xiangwen Li
- School of Public Health, North China University of Science and Technology, No. 21 Bohai Avenue, Caofeidian Area, Tangshan, 063210, Hebei Province, People's Republic of China
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3
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Mandal S, Chakrabarty D, Bhattacharya A, Paul J, Haldar S, Pal K. miRNA regulation of G protein-coupled receptor mediated angiogenic pathways in cancer. THE NUCLEUS 2021. [DOI: 10.1007/s13237-021-00365-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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4
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Evaluating the benefits of renin-angiotensin system inhibitors as cancer treatments. Pharmacol Ther 2020; 211:107527. [PMID: 32173557 DOI: 10.1016/j.pharmthera.2020.107527] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 03/08/2020] [Indexed: 02/07/2023]
Abstract
G-protein-coupled receptors (GPCRs) are the largest and most diverse group of cellular membrane receptors identified and characterized. It is estimated that 30 to 50% of marketed drugs target these receptors. The angiotensin II receptor type 1 (AT1R) is a GPCR which signals in response to systemic alterations of the peptide hormone angiotensin II (AngII) in circulation. The enzyme responsible for converting AngI to AngII is the angiotensin-converting enzyme (ACE). Specific inhibitors for the AT1R (more commonly known as AT1R blockers or antagonists) and ACE are well characterized for their effects on the cardiovascular system. Combined with the extensive clinical data available on patient tolerance of AT1R blockers (ARBs) and ACE inhibitors (ACEIs), as well as their non-classical roles in cancer, the notion of repurposing this class of medications as cancer treatment(s) is explored in the current review. Given that AngII-dependent AT1R activity directly regulates angiogenesis, remodeling of vasculature, pro-inflammatory responses, stem cell programming and hematopoiesis, and electrolyte balance; the modulation of these processes with pharmacologically well characterized medications could present a valuable complementary treatment option for cancer patients.
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5
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Guyenet PG, Stornetta RL, Holloway BB, Souza GMPR, Abbott SBG. Rostral Ventrolateral Medulla and Hypertension. Hypertension 2019; 72:559-566. [PMID: 30354763 DOI: 10.1161/hypertensionaha.118.10921] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Patrice G Guyenet
- From the Department of Pharmacology, University of Virginia, Charlottesville
| | - Ruth L Stornetta
- From the Department of Pharmacology, University of Virginia, Charlottesville
| | - Benjamin B Holloway
- From the Department of Pharmacology, University of Virginia, Charlottesville
| | - George M P R Souza
- From the Department of Pharmacology, University of Virginia, Charlottesville
| | - Stephen B G Abbott
- From the Department of Pharmacology, University of Virginia, Charlottesville
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6
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Coulson R, Liew SH, Connelly AA, Yee NS, Deb S, Kumar B, Vargas AC, O'Toole SA, Parslow AC, Poh A, Putoczki T, Morrow RJ, Alorro M, Lazarus KA, Yeap EFW, Walton KL, Harrison CA, Hannan NJ, George AJ, Clyne CD, Ernst M, Allen AM, Chand AL. The angiotensin receptor blocker, Losartan, inhibits mammary tumor development and progression to invasive carcinoma. Oncotarget 2017; 8:18640-18656. [PMID: 28416734 PMCID: PMC5386636 DOI: 10.18632/oncotarget.15553] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 02/07/2017] [Indexed: 01/06/2023] Open
Abstract
Drugs that target the Renin-Angiotensin System (RAS) have recently come into focus for their potential utility as cancer treatments. The use of Angiotensin Receptor Blockers (ARBs) and Angiotensin-Converting Enzyme (ACE) Inhibitors (ACEIs) to manage hypertension in cancer patients is correlated with improved survival outcomes for renal, prostate, breast and small cell lung cancer. Previous studies demonstrate that the Angiotensin Receptor Type I (AT1R) is linked to breast cancer pathogenesis, with unbiased analysis of gene-expression studies identifying significant up-regulation of AGTR1, the gene encoding AT1R in ER+ve/HER2−ve tumors correlating with poor prognosis. However, there is no evidence, so far, of the functional contribution of AT1R to breast tumorigenesis. We explored the potential therapeutic benefit of ARB in a carcinogen-induced mouse model of breast cancer and clarified the mechanisms associated with its success. Mammary tumors were induced with 7,12-dimethylbenz[α]antracene (DMBA) and medroxyprogesterone acetate (MPA) in female wild type mice and the effects of the ARB, Losartan treatment assessed in a preventative setting (n = 15 per group). Tumor histopathology was characterised by immunohistochemistry, real-time qPCR to detect gene expression signatures, and tumor cytokine levels measured with quantitative bioplex assays. AT1R was detected with radiolabelled ligand binding assays in fresh frozen tumor samples. We showed that therapeutic inhibition of AT1R, with Losartan, resulted in a significant reduction in tumor burden; and no mammary tumor incidence in 20% of animals. We observed a significant reduction in tumor progression from DCIS to invasive cancer with Losartan treatment. This was associated with reduced tumor cell proliferation and a significant reduction in IL-6, pSTAT3 and TNFα levels. Analysis of tumor immune cell infiltrates, however, demonstrated no significant differences in the recruitment of lymphocytes or tumour-associated macrophages in Losartan or vehicle-treated mammary tumors. Analysis of AT1R expression with radiolabelled ligand binding assays in human breast cancer biopsies showed high AT1R levels in 30% of invasive ductal carcinomas analysed. Furthermore, analysis of the TCGA database identified that high AT1R expression to be associated with luminal breast cancer subtype. Our in vivo data and analysis of human invasive ductal carcinoma samples identify the AT1R is a potential therapeutic target in breast cancer, with the availability of a range of well-tolerated inhibitors currently used in clinics. We describe a novel signalling pathway critical in breast tumorigenesis, that may provide new therapeutic avenues to complement current treatments.
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Affiliation(s)
- Rhiannon Coulson
- Cancer Drug Discovery, Hudson's Institute of Medical Research, Clayton, VIC, Australia.,Translational Breast Cancer Research, Garvan Institute, Darlinghurst, Sydney, NSW, Australia
| | - Seng H Liew
- Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia
| | | | - Nicholas S Yee
- Cancer and Inflammation Laboratory, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia
| | - Siddhartha Deb
- Anatomical Pathology, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia
| | - Beena Kumar
- Anatomical Pathology, Monash Health, Clayton, VIC, Australia
| | - Ana C Vargas
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, NSW, Australia
| | - Sandra A O'Toole
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, NSW, Australia.,Translational Breast Cancer Research, Garvan Institute, Darlinghurst, Sydney, NSW, Australia.,Sydney Medical School, Sydney University, NSW, Australia
| | - Adam C Parslow
- Tumor Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, VIC, Australia
| | - Ashleigh Poh
- Inflammation Division, Walter and Eliza Hall Institute of Medical Research, VIC, Australia
| | - Tracy Putoczki
- Inflammation Division, Walter and Eliza Hall Institute of Medical Research, VIC, Australia
| | - Riley J Morrow
- Cancer and Inflammation Laboratory, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia
| | - Mariah Alorro
- Cancer and Inflammation Laboratory, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia
| | - Kyren A Lazarus
- Cancer Drug Discovery, Hudson's Institute of Medical Research, Clayton, VIC, Australia.,Department of Pharmacology, University of Cambridge, Cambridge, UK
| | - Evie F W Yeap
- Cancer Drug Discovery, Hudson's Institute of Medical Research, Clayton, VIC, Australia
| | - Kelly L Walton
- Department of Physiology, Monash University, Clayton, VIC, Australia
| | - Craig A Harrison
- Department of Physiology, Monash University, Clayton, VIC, Australia
| | - Natalie J Hannan
- Translational Obstetrics Group, Department of Obstetrics and Gynaecology, University of Melbourne, Mercy Hospital, Heidelberg, VIC, Australia
| | - Amee J George
- The ACRF Department of Cancer Biology and Therapeutics, John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - Colin D Clyne
- Cancer Drug Discovery, Hudson's Institute of Medical Research, Clayton, VIC, Australia
| | - Matthias Ernst
- Cancer and Inflammation Laboratory, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, VIC, Australia
| | - Andrew M Allen
- Department of Physiology, University of Melbourne, VIC, Australia
| | - Ashwini L Chand
- Cancer Drug Discovery, Hudson's Institute of Medical Research, Clayton, VIC, Australia.,Cancer and Inflammation Laboratory, Olivia Newton-John Cancer Research Institute, Heidelberg, VIC, Australia.,School of Cancer Medicine, La Trobe University, Heidelberg, VIC, Australia
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7
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Guo L, Li PH, Li H, Colicino E, Colicino S, Wen Y, Zhang R, Feng X, Barrow TM, Cayir A, Baccarelli AA, Byun HM. Effects of environmental noise exposure on DNA methylation in the brain and metabolic health. ENVIRONMENTAL RESEARCH 2017; 153:73-82. [PMID: 27914298 DOI: 10.1016/j.envres.2016.11.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 05/17/2023]
Abstract
Environmental noise exposure is associated with adverse effects on human health including hearing loss, heart disease, and changes in stress-related hormone levels. Alteration in DNA methylation in response to environmental exposures is a well-known phenomenon and it is implicated in many human diseases. Understanding how environmental noise exposures affect DNA methylation patterns may help to elucidate the link between noise and adverse effects on health. In this pilot study we examined the effects of environmental noise exposure on DNA methylation of genes related to brain function and investigated whether these changes are related with metabolic health. We exposed four groups of male Wistar rats to moderate intensity noise (70-75dB with 20-4000Hz) at night for three days as short-term exposure, and for three weeks as long-term exposure. Noise exposure was limited to 45dB during the daytime. Control groups were exposed to only 45dB, day and night. We measured DNA methylation in the Bdnf, Comt, Crhr1, Mc2r, and Snca genes in tissue from four brain regions of the rats (hippocampus, frontal lobe, medulla oblongata, and inferior colliculus). Further, we measured blood pressure and body weight after long-term noise exposure. We found that environmental noise exposure is associated with gene-specific DNA methylation changes in specific regions of the brain. Changes in DNA methylation are significantly associated with changes in body weight (between Bdnf DNA methylation and Δ body weight: r=0.59, p=0.018; and between LINE-1 ORF DNA methylation and Δ body weight: =-0.80, p=0.0004). We also observed that noise exposure decreased blood pressure (p=0.038 for SBP, p=0.017 for DBP and p 0. 017 for MAP) and decreased body weight (β=-26g, p=0.008). In conclusion, environmental noise exposures can induce changes in DNA methylation in the brain, which may be associated with adverse effects upon metabolic health through modulation of response to stress-related hormones.
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Affiliation(s)
- Liqiong Guo
- Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | - Peng-Hui Li
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Hua Li
- Department of Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, Liaoning 116044, China
| | - Elena Colicino
- Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Silvia Colicino
- Respiratory Epidemiology, Occupational Medicine and Public Health, Imperial College, London, United Kingdom
| | - Yi Wen
- Department of Radiology, No. 531 Hospital of the PLA, Tonghua, Jilin 134000, China
| | - Ruiping Zhang
- Department of Radiology, No. 531 Hospital of the PLA, Tonghua, Jilin 134000, China
| | - Xiaotian Feng
- Department of Bioengineering, School of Mineral Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Timothy M Barrow
- Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne NE2 4HH, United Kingdom
| | - Akin Cayir
- Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | | | - Hyang-Min Byun
- Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
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8
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Blaustein MP, Chen L, Hamlyn JM, Leenen FHH, Lingrel JB, Wier WG, Zhang J. Pivotal role of α2 Na + pumps and their high affinity ouabain binding site in cardiovascular health and disease. J Physiol 2016; 594:6079-6103. [PMID: 27350568 DOI: 10.1113/jp272419] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 06/18/2016] [Indexed: 12/13/2022] Open
Abstract
Reduced smooth muscle (SM)-specific α2 Na+ pump expression elevates basal blood pressure (BP) and increases BP sensitivity to angiotensin II (Ang II) and dietary NaCl, whilst SM-α2 overexpression lowers basal BP and decreases Ang II/salt sensitivity. Prolonged ouabain infusion induces hypertension in rodents, and ouabain-resistant mutation of the α2 ouabain binding site (α2R/R mice) confers resistance to several forms of hypertension. Pressure overload-induced heart hypertrophy and failure are attenuated in cardio-specific α2 knockout, cardio-specific α2 overexpression and α2R/R mice. We propose a unifying hypothesis that reconciles these apparently disparate findings: brain mechanisms, activated by Ang II and high NaCl, regulate sympathetic drive and a novel neurohumoral pathway mediated by both brain and circulating endogenous ouabain (EO). Circulating EO modulates ouabain-sensitive α2 Na+ pump activity and Ca2+ transporter expression and, via Na+ /Ca2+ exchange, Ca2+ homeostasis. This regulates sensitivity to sympathetic activity, Ca2+ signalling and arterial and cardiac contraction.
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Affiliation(s)
- Mordecai P Blaustein
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA. .,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.
| | - Ling Chen
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA.,Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - John M Hamlyn
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Frans H H Leenen
- Hypertension Unit, University of Ottawa Heart Institute, Ottawa, ON, Canada, K1Y 4W7
| | - Jerry B Lingrel
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267-0524, USA
| | - W Gil Wier
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Jin Zhang
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
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9
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Morris BJ, Dampney RAL. Brain-stem microRNAs implicated in hypertension. Physiol Genomics 2015; 47:386-7. [PMID: 26242934 DOI: 10.1152/physiolgenomics.00079.2015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Brian J Morris
- Discipline of Physiology, School of Medical Sciences and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Roger A L Dampney
- Discipline of Physiology, School of Medical Sciences and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
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10
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van-Hover C, Li C. Stress-activated afferent inputs into the anterior parvicellular part of the paraventricular nucleus of the hypothalamus: Insights into urocortin 3 neuron activation. Brain Res 2015; 1611:29-43. [PMID: 25779038 PMCID: PMC4441854 DOI: 10.1016/j.brainres.2015.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 02/06/2015] [Accepted: 03/05/2015] [Indexed: 01/03/2023]
Abstract
Urocortin 3 (Ucn 3) is a member of the corticotropin-releasing factor family, which plays a major role in coordinating stress responses. Ucn 3 neurons in the anterior parvicellular part of the paraventricular nucleus of the hypothalamus (PVHap) provide prominent input into the ventromedial nucleus of the hypothalamus (VMH), a well known satiety center, where Ucn 3 acts to suppress feeding and modulate blood glucose levels. In the present study, we first determined that Ucn 3 expression in the PVHap was stimulated by acute restraint stress. We then performed retrograde tracing with fluorogold (FG) combined with immunohistochemistry for Fos as a marker for neuronal activation after restraint stress to determine the stress-activated afferent inputs into the PVHap. Substantial numbers of FG/Fos double labeled cells were found in the bed nucleus of the stria terminalis, the lateral septal nucleus, the medial amygdala, and a number of nuclei in the hypothalamus including the VMH, the arcuate nucleus, the posterior nucleus, and the ventral premammillary nucleus. In the brainstem, FG/Fos positive cells were found in the periaqueductal gray, the nucleus of the solitary tract, and the ventrolateral medulla. In conclusion, the present study showed that acute stress rapidly stimulates Ucn 3 expression in the PVHap and identified specific stress-sensitive brain areas that project to the PVHap. These areas are potentially important in mediating the stress-induced activation of Ucn 3 neurons in the PVHap.
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Affiliation(s)
- Christine van-Hover
- Department of Pharmacology and Neuroscience, University of Virginia Health System, P.O. Box 800735 1300 Jefferson Park Avenue, Charlottesville, VA 22908, United States
| | - Chien Li
- Department of Pharmacology and Neuroscience, University of Virginia Health System, P.O. Box 800735 1300 Jefferson Park Avenue, Charlottesville, VA 22908, United States.
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11
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The effect of losartan on differential reflex control of sympathetic nerve activity in chronic kidney disease. J Hypertens 2015; 33:1249-60. [DOI: 10.1097/hjh.0000000000000535] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Mechanism of sympathetic activation and blood pressure elevation in humans and animals following acute intermittent hypoxia. PROGRESS IN BRAIN RESEARCH 2014; 209:131-46. [PMID: 24746046 DOI: 10.1016/b978-0-444-63274-6.00007-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Sleep apnea is associated with repeated episodes of hypoxemia, causing marked increase in sympathetic nerve activity and blood pressure. Considerable evidence suggests that intermittent hypoxia (IH) resulting from apnea is the primary stimulus for sympathetic overactivity in sleep apnea patients. Several IH protocols have been developed either in animals or in humans to investigate mechanisms underlying the altered autonomic regulation of the circulation. Most of these protocols involve several days (10-40 days) of IH exposure, that is, chronic intermittent hypoxia (CIH). Recent data suggest that a single session of IH exposure, that is, acute intermittent hypoxia (AIH), is already capable of increasing tonic sympathetic nerve output (sympathetic long-term facilitation, LTF) and altering chemo- and baroreflexes with or without elevation of blood pressure. This indicates that IH alters the autonomic neurocirculatory at a very early time point, although the mechanisms underlying this neuroplasticity have not been explored in detail. The purpose of this chapter is to briefly review the effects of AIH on sympathetic LTF and alteration of autonomic reflexes in comparison with the studies from CIH studies. We will also discuss the potential central and peripheral mechanism underlying sympathetic LTF.
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13
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Guyenet PG, Stornetta RL, Bochorishvili G, Depuy SD, Burke PGR, Abbott SBG. C1 neurons: the body's EMTs. Am J Physiol Regul Integr Comp Physiol 2013; 305:R187-204. [PMID: 23697799 DOI: 10.1152/ajpregu.00054.2013] [Citation(s) in RCA: 197] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The C1 neurons reside in the rostral and intermediate portions of the ventrolateral medulla (RVLM, IVLM). They use glutamate as a fast transmitter and synthesize catecholamines plus various neuropeptides. These neurons regulate the hypothalamic pituitary axis via direct projections to the paraventricular nucleus and regulate the autonomic nervous system via projections to sympathetic and parasympathetic preganglionic neurons. The presympathetic C1 cells, located in the RVLM, are probably organized in a roughly viscerotopic manner and most of them regulate the circulation. C1 cells are variously activated by hypoglycemia, infection or inflammation, hypoxia, nociception, and hypotension and contribute to most glucoprivic responses. C1 cells also stimulate breathing and activate brain stem noradrenergic neurons including the locus coeruleus. Based on the various effects attributed to the C1 cells, their axonal projections and what is currently known of their synaptic inputs, subsets of C1 cells appear to be differentially recruited by pain, hypoxia, infection/inflammation, hemorrhage, and hypoglycemia to produce a repertoire of stereotyped autonomic, metabolic, and neuroendocrine responses that help the organism survive physical injury and its associated cohort of acute infection, hypoxia, hypotension, and blood loss. C1 cells may also contribute to glucose and cardiovascular homeostasis in the absence of such physical stresses, and C1 cell hyperactivity may contribute to the increase in sympathetic nerve activity associated with diseases such as hypertension.
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Affiliation(s)
- Patrice G Guyenet
- Department of Pharmacology, University of Virginia, Charlottesville, VA 22908-0735, USA.
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Role of hypothalamic angiotensin type 1 receptors in pressure overload-induced mineralocorticoid receptor activation and salt-induced sympathoexcitation. Hypertens Res 2013; 36:513-9. [DOI: 10.1038/hr.2012.221] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Koba S, Watanabe R, Kano N, Watanabe T. Oxidative stress exaggerates skeletal muscle contraction-evoked reflex sympathoexcitation in rats with hypertension induced by angiotensin II. Am J Physiol Heart Circ Physiol 2012; 304:H142-53. [PMID: 23086992 DOI: 10.1152/ajpheart.00423.2012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Muscle contraction stimulates thin fiber muscle afferents and evokes reflex sympathoexcitation. In hypertension, this reflex is exaggerated. ANG II, which is elevated in hypertension, has been reported to trigger the production of superoxide and other reactive oxygen species. In the present study, we tested the hypothesis that increased ANG II in hypertension exaggerates skeletal muscle contraction-evoked reflex sympathoexcitation by inducing oxidative stress in the muscle. In rats, subcutaneous infusion of ANG II at 450 ng·kg(-1)·min(-1) for 14 days significantly (P < 0.05) elevated blood pressure compared with sham-operated (sham) rats. Electrically induced 30-s hindlimb muscle contraction in decerebrate rats with hypertension evoked larger renal sympathoexcitatory and pressor responses [+1,173 ± 212 arbitrary units (AU) and +35 ± 5 mmHg, n = 10] compared with sham normotensive rats (+419 ± 103 AU and +13 ± 2 mmHg, n = 11). Tempol, a SOD mimetic, injected intra-arterially into the hindlimb circulation significantly reduced responses in hypertensive rats, whereas this compound had no effect on responses in sham rats. Tiron, another SOD mimetic, also significantly reduced reflex renal sympathetic and pressor responses in a subset of hypertensive rats (n = 10). Generation of muscle superoxide, as evaluated by dihydroethidium staining, was increased in hypertensive rats. RT-PCR and immunoblot experiments showed that mRNA and protein for gp91(phox), a NADPH oxidase subunit, in skeletal muscle tissue were upregulated in hypertensive rats. Taken together, hese results suggest that increased ANG II in hypertension induces oxidative stress in skeletal muscle, thereby exaggerating the muscle reflex.
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Affiliation(s)
- Satoshi Koba
- Division of Integrative Physiology, Tottori University Faculty of Medicine, 86 Nishi-cho, Yonago, Tottori, Japan.
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Roysommuti S, Wyss JM. Perinatal taurine exposure affects adult arterial pressure control. Amino Acids 2012; 46:57-72. [PMID: 23070226 DOI: 10.1007/s00726-012-1417-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Accepted: 10/04/2012] [Indexed: 12/13/2022]
Abstract
Taurine is an abundant, free amino acid found in mammalian cells that contributes to many physiologic functions from that of a simple cell osmolyte to a programmer of adult health and disease. Taurine's contribution extends from conception throughout life, but its most critical exposure period is during perinatal life. In adults, taurine supplementation prevents or alleviates cardiovascular disease and related complications. In contrast, low taurine consumption coincides with increased risk of cardiovascular disease, obesity and type II diabetes. This review focuses on the effects that altered perinatal taurine exposure has on long-term mechanisms that control adult arterial blood pressure and could thereby contribute to arterial hypertension through its ability to program these cardiovascular regulatory mechanisms very early in life. The modifications of these mechanisms can last a lifetime and transfer to the next generation, suggesting that epigenetic mechanisms underlie the changes. The ability of perinatal taurine exposure to influence arterial pressure control mechanisms and hypertension in adult life appears to involve the regulation of growth and development, the central and autonomic nervous system, the renin-angiotensin system, glucose-insulin interaction and changes to heart, blood vessels and kidney function.
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Affiliation(s)
- Sanya Roysommuti
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand,
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Gomide JMC, de Menezes RC, Fernandes LG, Silva FC, Cardoso LM, Miranda PH, da Silva Jr LG, Lima MP, Pesquero JL, Foureaux G, Ferreira AJ, Chianca-Jr DA. Increased activity of the renin-angiotensin and sympathetic nervous systems is required for regulation of the blood pressure in rats fed a low-protein diet. Exp Physiol 2012; 98:57-66. [DOI: 10.1113/expphysiol.2012.066712] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Parker LM, Tallapragada VJ, Kumar NN, Goodchild AK. Distribution and localisation of Gα proteins in the rostral ventrolateral medulla of normotensive and hypertensive rats: focus on catecholaminergic neurons. Neuroscience 2012; 218:20-34. [PMID: 22626648 DOI: 10.1016/j.neuroscience.2012.05.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 05/11/2012] [Accepted: 05/12/2012] [Indexed: 02/07/2023]
Abstract
About 860 G-protein-coupled receptors (GPCRs) mediate their actions via heterotrimeric G-proteins. Their activation releases Gα from Gβλ subunits. The type of Gα subunit dictates the major signalling proteins involved: adenylyl cyclase, PLC and rhoGEF. The rostral ventrolateral medulla (RVLM), containing the rostral C1 (rC1) cell group, sets and maintains the tonic and reflex control of blood pressure and a plethora of inputs converge onto these neurons. We determined the relative abundance of 10 Gα subunit mRNAs, representing the four major families, within the RVLM, using quantitative RT-PCR. In situ hybridisation (ISH) combined with immunohistochemistry (IHC) was used to quantify and compare this expression in rC1 with that in the A1 and A5 cell groups. The relative abundance of Gα subunit mRNAs and a comparison of gene expression levels were quantitatively determined in normotensive and hypertensive rat strains. All 10 Gα mRNAs were detected in the RVLM of Sprague-Dawley (SD) rats with relative abundance such that Gαs>Gαi2>Gαo>Gαq>GαL>Gα11>Gαi3>Gαi1>Gα12>Gα13. The high abundance of Gα mRNAs signalling via adenylyl cyclase indicates the importance of associated GPCRs. Within the rC1 and A1 groups similar differential Gα mRNA expression profiles were seen with Gαs being found in all rC1 cells, Gα11 absent and Gαi3 rarely expressed. Thus functionally distinct subgroups exist within the rC1 and A1 cell groups as differing distributions of Gα subunits must reflect the array of GPCRs that influence their activity. In contrast, all A5 cells expressed all Gα mRNAs suggesting a functionally homogeneous group. When the 10 Gα mRNAs of the RVLM in spontaneously hypertensive rats (SHR) were compared quantitatively to Wistar-Kyoto (WKY), only Gαs and Gα12 were significantly elevated. However when the expression in normotensive SD and WKY was compared with SHR no significant differences were evident. These findings demonstrate a range of GPCR signalling capabilities in brainstem neurons important for homeostasis and suggest a prominent role for signalling via adenylyl cyclase.
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Affiliation(s)
- L M Parker
- The Australian School of Advanced Medicine, 2 Technology Place, Macquarie University, 2109 NSW, Australia
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Zucker IH, Zimmerman MC. The renin-angiotensin system in 2011: new avenues for translational research. Curr Opin Pharmacol 2011; 11:101-4. [PMID: 21371939 DOI: 10.1016/j.coph.2011.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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