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Bai C, Zhang F, Yang Z, Zhang Y, Guo D, Zhang Q. Formaldehyde induced the cardiac damage by regulating the NO/cGMP signaling pathway and L-Ca 2+ channels. Toxicol Res (Camb) 2023; 12:1105-1112. [PMID: 38145098 PMCID: PMC10734627 DOI: 10.1093/toxres/tfad102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 09/25/2023] [Accepted: 10/09/2023] [Indexed: 12/26/2023] Open
Abstract
Background Formaldehyde (FA) is a common environmental pollutant that has been found to cause negative cardiovascular effects, however, the toxicological mechanism is not well understood. In this study, we investigated the molecular effects of the Nitric Oxide (NO)/cyclic Guanosine Monophosphate (cGMP) signaling pathway and L-type calcium (L-Ca2+) channels in rat hearts. Methods We designed the short-term FA exposure on the rat heart in different concentrations (0, 0.5, 3, 18 mg/m3). After 7 days of exposure, the rats were sacrificed and the rat tissues were removed for various experiments. Results Our experimental data showed that FA resulted in the upregulation NO and cGMP, especially at 18 mg/m3. Further, when exposed to high concentrations of FA, Cav1.2 and Cav1.3 expression decreased. We conclude that the NO/cGMP signaling pathway and downstream related channels can be regulated by increasing the production of NO in the low concentration group of FA. High concentration FA directly regulates L-Ca22+ channels. Conclusion This study suggests that FA damages the function of the cardiovascular system by regulating the NO/cGMP signaling pathway and L-Ca2+ channels.
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Affiliation(s)
- Caixia Bai
- College of Environment and Resource, Shanxi University, Taiyuan 030006, China
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Fu Zhang
- College of Environment and Resource, Shanxi University, Taiyuan 030006, China
| | - Zhenhua Yang
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
- Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan 030006, China
| | - Yuexia Zhang
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
- Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan 030006, China
| | - Donggang Guo
- College of Environment and Resource, Shanxi University, Taiyuan 030006, China
- Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan 030006, China
| | - Quanxi Zhang
- College of Environment and Resource, Shanxi University, Taiyuan 030006, China
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
- Shanxi Laboratory for Yellow River, Shanxi University, Taiyuan 030006, China
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Bork NI, Nikolaev VO. cGMP Signaling in the Cardiovascular System-The Role of Compartmentation and Its Live Cell Imaging. Int J Mol Sci 2018. [PMID: 29534460 PMCID: PMC5877662 DOI: 10.3390/ijms19030801] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The ubiquitous second messenger 3′,5′-cyclic guanosine monophosphate (cGMP) regulates multiple physiologic processes in the cardiovascular system. Its intracellular effects are mediated by stringently controlled subcellular microdomains. In this review, we will illustrate the current techniques available for real-time cGMP measurements with a specific focus on live cell imaging methods. We will also discuss currently accepted and emerging mechanisms of cGMP compartmentation in the cardiovascular system.
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Affiliation(s)
- Nadja I Bork
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, University of Hamburg, Hamburg 20246, Germany.
- German Center for Cardiovascular Research (DZHK), Partner site Hamburg/Kiel/Lübeck, Hamburg 20246, Germany.
| | - Viacheslav O Nikolaev
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, University of Hamburg, Hamburg 20246, Germany.
- German Center for Cardiovascular Research (DZHK), Partner site Hamburg/Kiel/Lübeck, Hamburg 20246, Germany.
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Irvine JC, Ganthavee V, Love JE, Alexander AE, Horowitz JD, Stasch JP, Kemp-Harper BK, Ritchie RH. The soluble guanylyl cyclase activator bay 58-2667 selectively limits cardiomyocyte hypertrophy. PLoS One 2012; 7:e44481. [PMID: 23144773 PMCID: PMC3492396 DOI: 10.1371/journal.pone.0044481] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 08/07/2012] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Although evidence now suggests cGMP is a negative regulator of cardiac hypertrophy, the direct consequences of the soluble guanylyl cyclase (sGC) activator BAY 58-2667 on cardiac remodeling, independent of changes in hemodynamic load, has not been investigated. In the present study, we tested the hypothesis that the NO(•)-independent sGC activator BAY 58-2667 inhibits cardiomyocyte hypertrophy in vitro. Concomitant impact of BAY 58-2667 on cardiac fibroblast proliferation, and insights into potential mechanisms of action, were also sought. Results were compared to the sGC stimulator BAY 41-2272. METHODS Neonatal rat cardiomyocytes were incubated with endothelin-1 (ET(1), 60nmol/L) in the presence and absence of BAY 41-2272 and BAY 58-2667 (0.01-0.3 µmol/L). Hypertrophic responses and its triggers, as well as cGMP signaling, were determined. The impact of both sGC ligands on basal and stimulated cardiac fibroblast proliferation in vitro was also determined. RESULTS We now demonstrate that BAY 58-2667 (0.01-0.3 µmol/L) elicited concentration-dependent antihypertrophic actions, inhibiting ET(1)-mediated increases in cardiomyocyte 2D area and de novo protein synthesis, as well as suppressing ET(1)-induced cardiomyocyte superoxide generation. This was accompanied by potent increases in cardiomyocyte cGMP accumulation and activity of its downstream signal, vasodilator-stimulated phosphoprotein (VASP), without elevating cardiomyocyte cAMP. In contrast, submicromolar concentrations of BAY 58-2667 had no effect on basal or stimulated cardiac fibroblast proliferation. Indeed, only at concentrations ≥10 µmol/L was inhibition of cardiac fibrosis seen in vitro. The effects of BAY 58-2667 in both cell types were mimicked by BAY 41-2272. CONCLUSIONS Our results demonstrate that BAY 58-2667 elicits protective, cardiomyocyte-selective effects in vitro. These actions are associated with sGC activation and are evident in the absence of confounding hemodynamic factors, at low (submicromolar) concentrations. Thus this distinctive sGC ligand may potentially represent an alternative therapeutic approach for limiting myocardial hypertrophy.
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Affiliation(s)
- Jennifer C. Irvine
- Heart Failure Pharmacology, Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia
| | - Virat Ganthavee
- Heart Failure Pharmacology, Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia
- Department of Pharmacology, Monash University, Clayton, Victoria, Australia
| | - Jane E. Love
- Heart Failure Pharmacology, Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia
| | - Amy E. Alexander
- Heart Failure Pharmacology, Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia
| | - John D. Horowitz
- Cardiology Unit, The Queen Elizabeth Hospital, Woodville South, South Australia, Australia
| | | | | | - Rebecca H. Ritchie
- Heart Failure Pharmacology, Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia
- Department of Medicine, Monash University, Clayton, Victoria, Australia
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4
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Yang Y, Gao X, Wang X, Su L, Xing H. Total Flavonoids of Fructus Chorspondiatis inhibits collagen synthesis of cultured rat cardiac fibroblasts induced by angiotensin II: correlated with NO/cGMP signaling pathway. Eur J Pharm Sci 2012; 47:75-83. [PMID: 22634221 DOI: 10.1016/j.ejps.2012.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 04/18/2012] [Accepted: 05/14/2012] [Indexed: 11/15/2022]
Abstract
AIM To investigate the molecular mechanism of Total Flavonoids of Fructus Chorspondiatis (TFFC) on preventing cardiac fibroblasts collagen synthesis induced by angiotensin II. METHODS Collagen synthesis was determined by measuring (3)H-proline incorporation cardiac fibroblasts and hydroxyproline content in the culture mediums. The expression of collagen types I and III mRNA and protein was measured by RT-PCR and western blot, respectively. NO level in the culture medium was measured by the Griess reagent. NOS level in the culture medium was measured by chemical colorimetric method. The cellular concentration of cyclic GMP (cGMP) was measured by radioimmunoassay. RESULTS TFFC (25, 50, and 100mg/L) inhibited collagen synthesis in cardiac fibroblasts in a dose-dependent manner compared with angiotensin II group (P<0.01), and the inhibitory effects were blocked by pretreatment with NG-nitro-L-arginine methyl ester (L-NAME) and 1H-[1,2,4]-oxadiazole-[4,3-a]-quinoxalin-1-one (ODQ). TFFC increased nitric oxide (NO) and nitric oxide synthase (NOS) levels in the culture medium, increased intracellular cGMP level in cardiac fibroblasts, decreased collagen types I and III protein level in cardiac fibroblasts. The mRNA expression of collagen type I and III was suppressed by TFFC. CONCLUSIONS These results suggested that TFFC inhibited collagen synthesis induced by angiotensin II in cardiac fibroblasts, and the inhibitory effect might associate with the activation of the NO/cGMP signaling pathway.
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Affiliation(s)
- Yumin Yang
- Department of Cardiovascular Disease, Traditional Chinese-Mongolian Hospital of Inner Mongolia Autonomous Region, Hohhot 010020, China.
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5
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Fallahian F, Karami-Tehrani F, Salami S. Induction of apoptosis by type Iβ protein kinase G in the human breast cancer cell lines MCF-7 and MDA-MB-468. Cell Biochem Funct 2011; 30:183-90. [PMID: 22095901 DOI: 10.1002/cbf.1831] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 10/06/2011] [Accepted: 10/06/2011] [Indexed: 11/11/2022]
Abstract
Activation of protein kinase G (PKG) by cyclic guanosine 3,5-monophosphate (cGMP) has become of considerable interest as a novel molecular approach for the induction of apoptosis in cancer cells. This study was conducted to investigate the role of PKG isoforms in the regulation of cell growth in human breast cancer cell lines MCF-7 and MDA-MB468. The expression levels of PKG isoforms were also examined using real-time reverse transcriptase polymerase chain reaction. No differences in the gene expression of PKG isoforms were observed between MCF-7 and MDA-MB-468 cells. To investigate the effects of PKG isoforms on the regulation of cell growth, the cGMP analogues 8-APT-cGMP (PKGIα activator), 8-Br-PET-cGMP (PKGIβ activator) and 8-pCPT-cGMP (PKGII activator) were employed. Apoptosis was assessed with the Annexin-V-propidium iodide (PI) staining, cell cycle analysis and caspase-3/9 activity assay. Treatment of MCF-7 and MDA-MB-468 cells with 8-Br-PET-cGMP resulted in a concentration-dependent cell growth inhibition and apoptosis, whereas neither PKGIα nor PKGII activators had any effect on the cell growth. The role of PKGIβ in the inhibition of cell growth was confirmed using PKGI and PKGII inhibitors. The present study is the first to demonstrate the involvement of PKGIβ in the inhibition of cell growth and induction of apoptosis in breast cancer cells.
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Affiliation(s)
- Faranak Fallahian
- Department of Clinical Biochemistry, Cancer Research Laboratory, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Leung EL, Wong JC, Johlfs MG, Tsang BK, Fiscus RR. Protein kinase G type Ialpha activity in human ovarian cancer cells significantly contributes to enhanced Src activation and DNA synthesis/cell proliferation. Mol Cancer Res 2010; 8:578-91. [PMID: 20371672 DOI: 10.1158/1541-7786.mcr-09-0178] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Previously, we showed that basal activity of nitric oxide (NO)/cyclic GMP (cGMP)/protein kinase G (PKG) signaling pathway protects against spontaneous apoptosis and confers resistance to cisplatin-induced apoptosis in human ovarian cancer cells. The present study determines whether basal PKG kinase activity regulates Src family kinase (SFK) activity and proliferation in these cells. PKG-Ialpha was identified as predominant isoform in both OV2008 (cisplatin-sensitive, wild-type p53) and A2780cp (cisplatin-resistant, mutated p53) ovarian cancer cells. In both cell lines, ODQ (inhibitor of endogenous NO-induced cGMP biosynthesis), DT-2 (highly specific inhibitor of PKG-Ialpha kinase activity), and PKG-Ialpha knockdown (using small interfering RNA) caused concentration-dependent inhibition of DNA synthesis (assessed by bromodeoxyuridine incorporation), indicating an important role of basal cGMP/PKG-Ialpha kinase activity in promoting cell proliferation. DNA synthesis in OV2008 cells was dependent on SFK activity, determined using highly selective SFK inhibitor, 4-(4'-phenoxyanilino)-6,7-dimethoxyquinazoline (SKI-1). Studies using DT-2 and PKG-Ialpha small interfering RNA revealed that SFK activity was dependent on PKG-Ialpha kinase activity. Furthermore, SFK activity contributed to endogenous tyrosine phosphorylation of PKG-Ialpha in OV2008 and A2780cp cells. In vitro coincubation of recombinant human c-Src and PKG-Ialpha resulted in c-Src-mediated tyrosine phosphorylation of PKG-Ialpha and enhanced c-Src autophosphorylation/activation, suggesting that human c-Src directly tyrosine phosphorylates PKG-Ialpha and the c-Src/PKG-Ialpha interaction enhances Src kinase activity. Epidermal growth factor-induced stimulation of SFK activity in OV2008 cells increased PKG-Ialpha kinase activity (indicated by Ser(239) phosphorylation of the PKG substrate vasodilator-stimulated phosphoprotein), which was blocked by both SKI-1 and SU6656. The data suggest an important role of Src/PKG-Ialpha interaction in promoting DNA synthesis/cell proliferation in human ovarian cancer cells. The NO/cGMP/PKG-Ialpha signaling pathway may provide a novel therapeutic target for disrupting ovarian cancer cell proliferation.
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Basu N, Arshad N, Visweswariah SS. Receptor guanylyl cyclase C (GC-C): regulation and signal transduction. Mol Cell Biochem 2009; 334:67-80. [PMID: 19960363 DOI: 10.1007/s11010-009-0324-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Accepted: 11/04/2009] [Indexed: 12/27/2022]
Abstract
Receptor guanylyl cyclase C (GC-C) is the target for the gastrointestinal hormones, guanylin, and uroguanylin as well as the bacterial heat-stable enterotoxins. The major site of expression of GC-C is in the gastrointestinal tract, although this receptor and its ligands play a role in ion secretion in other tissues as well. GC-C shares the domain organization seen in other members of the family of receptor guanylyl cyclases, though subtle differences highlight some of the unique features of GC-C. Gene knock outs in mice for GC-C or its ligands do not lead to embryonic lethality, but modulate responses of these mice to stable toxin peptides, dietary intake of salts, and development and differentiation of intestinal cells. It is clear that there is much to learn in future about the role of this evolutionarily conserved receptor, and its properties in intestinal and extra-intestinal tissues.
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Affiliation(s)
- Nirmalya Basu
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560012, India
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8
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Vrljicak P, Chang ACY, Morozova O, Wederell ED, Niessen K, Marra MA, Karsan A, Hoodless PA. Genomic analysis distinguishes phases of early development of the mouse atrio-ventricular canal. Physiol Genomics 2009; 40:150-7. [PMID: 19952280 DOI: 10.1152/physiolgenomics.00142.2009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Valve formation during embryonic heart development involves a complex interplay of regional specification, cell transformations, and remodeling events. While many studies have addressed the role of specific genes during this process, a global understanding of the genetic basis for the regional specification and development of the heart valves is incomplete. We have undertaken genome-wide transcriptional profiling of the developing heart valves in the mouse. Four Serial Analysis of Gene Expression libraries were generated and analyzed from the mouse atrio-ventricular canal (AVC) at embryonic days 9.5-12.5, covering the stages from initiation of endothelial to mesenchymal transition (EMT) through to the beginning of endocardial cushion remodeling. We identified 14 distinct temporal patterns of gene expression during AVC development. These were associated with specific functions and signaling pathway members. We defined the temporal distribution of mesenchyme genes during the EMT process and of specific Notch and transforming growth factor-beta targets. This work provides the first comprehensive temporal dataset during the formation of heart valves. These results identify molecular signatures that distinguish different phases of early heart valve formation allowing gene expression and function to be further investigated.
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Affiliation(s)
- Pavle Vrljicak
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada V5Z 1L3
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9
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Ieda M, Tsuchihashi T, Ivey KN, Ross RS, Hong TT, Shaw RM, Srivastava D. Cardiac fibroblasts regulate myocardial proliferation through beta1 integrin signaling. Dev Cell 2009; 16:233-44. [PMID: 19217425 DOI: 10.1016/j.devcel.2008.12.007] [Citation(s) in RCA: 419] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2008] [Revised: 11/18/2008] [Accepted: 12/18/2008] [Indexed: 12/25/2022]
Abstract
Growth and expansion of ventricular chambers is essential during heart development and is achieved by proliferation of cardiac progenitors. Adult cardiomyocytes, by contrast, achieve growth through hypertrophy rather than hyperplasia. Although epicardial-derived signals may contribute to the proliferative process in myocytes, the factors and cell types responsible for development of the ventricular myocardial thickness are unclear. Using a coculture system, we found that embryonic cardiac fibroblasts induced proliferation of cardiomyocytes, in contrast to adult cardiac fibroblasts that promoted myocyte hypertrophy. We identified fibronectin, collagen, and heparin-binding EGF-like growth factor as embryonic cardiac fibroblast-specific signals that collaboratively promoted cardiomyocyte proliferation in a paracrine fashion. Myocardial beta1-integrin was required for this proliferative response, and ventricular cardiomyocyte-specific deletion of beta1-integrin in mice resulted in reduced myocardial proliferation and impaired ventricular compaction. These findings reveal a previously unrecognized paracrine function of embryonic cardiac fibroblasts in regulating cardiomyocyte proliferation.
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Affiliation(s)
- Masaki Ieda
- Gladstone Institute of Cardiovascular Disease, University of California, San Francisco, 94158, USA
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10
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Irvine JC, Ritchie RH, Favaloro JL, Andrews KL, Widdop RE, Kemp-Harper BK. Nitroxyl (HNO): the Cinderella of the nitric oxide story. Trends Pharmacol Sci 2008; 29:601-8. [PMID: 18835046 DOI: 10.1016/j.tips.2008.08.005] [Citation(s) in RCA: 218] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Revised: 08/10/2008] [Accepted: 08/11/2008] [Indexed: 12/22/2022]
Abstract
Until recently, most of the biological effects of nitric oxide (NO) have been attributed to its uncharged state (NO*), yet NO can also exist in the reduced state as nitroxyl (HNO or NO(-)). Putatively generated from both NO synthase (NOS)-dependent and -independent sources, HNO is rapidly emerging as a novel entity with distinct pharmacology and therapeutic advantages over its redox sibling, NO*. Thus, unlike NO*, HNO can target cardiac sarcoplasmic ryanodine receptors to increase myocardial contractility, can interact directly with thiols and is resistant to both scavenging by superoxide (*O2-) and tolerance development. HNO donors are protective in the setting of heart failure in which NO donors have minimal impact. Here, we discuss the unique pharmacology of HNO versus NO* and highlight the therapeutic potential of HNO donors in the treatment of cardiovascular disease.
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Affiliation(s)
- Jennifer C Irvine
- Department of Pharmacology, Monash University, Clayton, VIC, Australia
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11
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Novotny NM, Ray R, Markel TA, Crisostomo PR, Wang M, Wang Y, Meldrum DR. Stem cell therapy in myocardial repair and remodeling. J Am Coll Surg 2008; 207:423-34. [PMID: 18722949 DOI: 10.1016/j.jamcollsurg.2008.04.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Revised: 04/04/2008] [Accepted: 04/07/2008] [Indexed: 01/01/2023]
Affiliation(s)
- Nathan M Novotny
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
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12
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Cook ALM, Haynes JM. Phosphorylation of the PKG substrate, vasodilator-stimulated phosphoprotein (VASP), in human cultured prostatic stromal cells. Nitric Oxide 2007; 16:10-7. [PMID: 17049286 DOI: 10.1016/j.niox.2006.09.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Revised: 08/06/2006] [Accepted: 09/05/2006] [Indexed: 11/29/2022]
Abstract
Nitric oxide (NO) is known to regulate contractility and proliferation of cells within the prostate, however, the mechanism by which this occurs is unknown. The cGMP-dependent protein kinase (PKG) signalling pathway may be involved, and recent work has shown that activation of this pathway can be assessed by analysis of phosphorylation of vasodilator-stimulated phosphoprotein (VASP). The aim of the current study is to characterise the expression of VASP in the human prostate and human cultured prostatic stromal cells (HCPSCs), and to investigate whether NO activates PKG in these cells. Our studies revealed that VASP is expressed, and that incubation of HCPSCs with PKG-activating cGMP-analogues or the NO-donor, SNP, caused a significant PKG-dependent increase in VASP serine-239 phosphorylation. In addition, SNP elicited a reduction in intracellular K(+) in a time frame consistent with the phosphorylation of VASP and activation of PKG. These data demonstrate that VASP can be used to assess the NO/cGMP/PKG signalling pathway in HCPSCs. In addition, we demonstrate for the first time that SNP, probably via NO release, leads to phosphorylation of VASP in a manner consistent with PKG activation.
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Affiliation(s)
- Anna-Louise M Cook
- School of Biomedical Sciences, Curtin University of Technology, Bentley, WA, USA
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Jurado S, Rodríguez-Pascual F, Sánchez-Prieto J, Reimunde FM, Lamas S, Torres M. NMDA induces post-transcriptional regulation of alpha2-guanylyl-cyclase-subunit expression in cerebellar granule cells. J Cell Sci 2006; 119:1622-31. [PMID: 16569663 DOI: 10.1242/jcs.02867] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Activation of N-methyl-D-aspartate (NMDA) glutamate receptors commonly affects gene expression in different neurons. We reported previously that chronic treatment of rat cerebellar granule cells with NMDA (24 hours) upregulates the expression of mRNA encoding the alpha2 subunit of the nitric-oxide-sensitive guanylyl cyclase. However, the molecular mechanisms involved in this process remained to be elucidated. Here, we have performed mRNA-decay experiments using the transcriptional inhibitor actinomycin D, providing evidence that the half-life of alpha2 mRNA is significantly prolonged in cells exposed to NMDA. The role of the 3' untranslated region of the alpha2 transcripts in NMDA-induced mRNA stabilisation was examined and an association between the RNA-binding proteins AUF1 and ELAV-like protein 1 (HuR/HuA), and endogenous alpha2 mRNA was demonstrated in vivo, as revealed by coimmunoprecipitation experiments with specific antibodies against AUF1 and HuR. Further studies indicated that stimulation of the NMDA receptor induces a downregulation in AUF1 levels stabilising the alpha2 mRNA transcripts. These events are triggered through a mechanism that depends on formation of nitric oxide, and on the subsequent activation of guanylyl cyclase and cGMP dependent protein kinases.
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Affiliation(s)
- Sandra Jurado
- Departamento de Bioquímica, Facultad de Veterinaria, Universidad Complutense, Madrid, E-28040 Spain
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14
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Schwartz F, Duka A, Duka I, Cui J, Gavras H. Novel targets of ANG II regulation in mouse heart identified by serial analysis of gene expression. Am J Physiol Heart Circ Physiol 2004; 287:H1957-66. [PMID: 15242839 DOI: 10.1152/ajpheart.00568.2004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although the central role of ANG II in cardiovascular homeostasis is well appreciated, the molecular circuitry of its many actions is not completely understood. With the use of serial analysis of gene expression to assess global transcriptional changes in the heart of mice after continuous 7-day ANG II administration, we identified patterns of gene expression indicative of cardiac remodeling, including coordinate regulation of genes previously described in a context of processes associated with hypertrophy and fibrosis. In addition, we discovered several novel ANG II targets, including characterized genes of known function, recently annotated genes of unknown function, and the putative genes not yet present in current databases. The serial analysis of gene expression approach to assess the role of ANG II presented in this report provides new venues for inquiries into ANG II-mediated cardiac function.
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Affiliation(s)
- Faina Schwartz
- Dept. of Medicine, Genetics Program, Boston Univ. School of Medicine, 715 Albany St., L-320, Boston, MA 02118, USA.
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15
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Current Awareness on Comparative and Functional Genomics. Comp Funct Genomics 2004. [PMCID: PMC2447433 DOI: 10.1002/cfg.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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