1
|
Wenzel P, Schuhmacher S, Oelze M, Scholz A, Daub S, Knorr M, Xia N, Otto C, Opitz B, Schulz E, Li H, Lackner KJ, Münzel T, Daiber A. Molecular mechanisms of the crosstalk between mitochondrial and NADPH oxidase derived reactive oxygen species in white blood cells — Implications for cardiovascular diseases. Vascul Pharmacol 2012. [DOI: 10.1016/j.vph.2011.08.096] [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: 11/16/2022]
|
2
|
Kossmann S, Knorr M, Stratmann J, Hausding M, Schuhmacher S, Karbach SH, Schwenk M, Yogev N, Schulz E, Oelze M, Grabbe S, Jonuleit H, Becker C, Daiber A, Waisman A, Münzel T, Wenzel P. Lysozyme M positive monocytes mediate angiotensin II-induced arterial hypertension and vascular dysfunction. Vascul Pharmacol 2012. [DOI: 10.1016/j.vph.2011.08.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
3
|
Steven S, Schuhmacher S, Wenzel P, Oelze M, Daub S, Scholz A, Xia N, Schulz E, Li H, Lackner KJ, Münzel T, Daiber A. Molecular mechanisms of the crosstalk between mitochondrial and NADPH oxidase derived reactive oxygen species in white blood cells – implications for cardiovascular diseases. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.575.3] [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)
- Sebastian Steven
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Swenja Schuhmacher
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Philip Wenzel
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Matthias Oelze
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Steffen Daub
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Alexander Scholz
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Ning Xia
- Department of PharmacologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Eberhard Schulz
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Huige Li
- Department of PharmacologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Karl J. Lackner
- Institute of Clinical Chemistry and Laboratory MedicineMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Thomas Münzel
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Andreas Daiber
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| |
Collapse
|
4
|
Steven S, Schuhmacher S, Oelze M, Bachschmid M, Doppler C, Daub S, Schuff A, Scholz A, Torzewski M, Schulz E, Lackner KJ, Münzel T, Daiber A. Glutathione peroxidase‐1‐deficiency enhances age‐dependent vascular dysfunction. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.573.1] [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)
- Sebastian Steven
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Swenja Schuhmacher
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Matthias Oelze
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Markus Bachschmid
- Institute of Clinical Chemistry and Laboratory MedicineMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Christopher Doppler
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Steffen Daub
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Alexandra Schuff
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Alexander Scholz
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | | | - Eberhard Schulz
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Karl J. Lackner
- Institute of Clinical Chemistry and Laboratory MedicineMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Thomas Münzel
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| | - Andreas Daiber
- 2nd Medical ClinicDepartment of CardiologyMedical Center of the Johannes Gutenberg UniversityMainzGermany
| |
Collapse
|
5
|
Schuhmacher S, Oelze M, Bollmann F, Kleinert H, Otto C, Heeren T, Steven S, Hausding M, Knorr M, Pautz A, Reifenberg K, Schulz E, Gori T, Wenzel P, Münzel T, Daiber A. Vascular dysfunction in experimental diabetes is improved by pentaerithrityl tetranitrate but not isosorbide-5-mononitrate therapy. Diabetes 2011; 60:2608-16. [PMID: 21844097 PMCID: PMC3178293 DOI: 10.2337/db10-1395] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
OBJECTIVE Diabetes is associated with vascular oxidative stress, activation of NADPH oxidase, and uncoupling of nitric oxide (NO) synthase (endothelial NO synthase [eNOS]). Pentaerithrityl tetranitrate (PETN) is an organic nitrate with potent antioxidant properties via induction of heme oxygenase-1 (HO-1). We tested whether treatment with PETN improves vascular dysfunction in the setting of experimental diabetes. RESEARCH DESIGN AND METHODS After induction of hyperglycemia by streptozotocin (STZ) injection (60 mg/kg i.v.), PETN (15 mg/kg/day p.o.) or isosorbide-5-mononitrate (ISMN; 75 mg/kg/day p.o.) was fed to Wistar rats for 7 weeks. Oxidative stress was assessed by optical methods and oxidative protein modifications, vascular function was determined by isometric tension recordings, protein expression was measured by Western blotting, RNA expression was assessed by quantitative RT-PCR, and HO-1 promoter activity in stable transfected cells was determined by luciferase assays. RESULTS PETN, but not ISMN, improved endothelial dysfunction. NADPH oxidase and serum xanthine oxidase activities were significantly reduced by PETN but not by ISMN. Both organic nitrates had minor effects on the expression of NADPH oxidase subunits, eNOS and dihydrofolate reductase (Western blotting). PETN, but not ISMN, normalized the expression of GTP cyclohydrolase-1, extracellular superoxide dismutase, and S-glutathionylation of eNOS, thereby preventing eNOS uncoupling. The expression of the antioxidant enzyme, HO-1, was increased by STZ treatment and further upregulated by PETN, but not ISMN, via activation of the transcription factor NRF2. CONCLUSIONS In contrast to ISMN, the organic nitrate, PETN, improves endothelial dysfunction in diabetes by preventing eNOS uncoupling and NADPH oxidase activation, thereby reducing oxidative stress. Thus, PETN therapy may be suited to treat patients with cardiovascular complications of diabetes.
Collapse
Affiliation(s)
- Swenja Schuhmacher
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
- Center of Thrombosis and Hemostasis, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Matthias Oelze
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Franziska Bollmann
- Pharmacology Department, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Hartmut Kleinert
- Pharmacology Department, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Christian Otto
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Tjebo Heeren
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Sebastian Steven
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Michael Hausding
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
- Center of Thrombosis and Hemostasis, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Maike Knorr
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Andrea Pautz
- Pharmacology Department, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Kurt Reifenberg
- Central Laboratory Animal Facility, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Eberhard Schulz
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Tommaso Gori
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Philip Wenzel
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
- Center of Thrombosis and Hemostasis, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Thomas Münzel
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Andreas Daiber
- 2nd Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
- Corresponding author: Andreas Daiber,
| |
Collapse
|
6
|
Wenzel P, Knorr M, Kossmann S, Stratmann J, Hausding M, Schuhmacher S, Karbach SH, Schwenk M, Yogev N, Schulz E, Oelze M, Grabbe S, Jonuleit H, Becker C, Daiber A, Waisman A, Münzel T. Lysozyme M-positive monocytes mediate angiotensin II-induced arterial hypertension and vascular dysfunction. Circulation 2011; 124:1370-81. [PMID: 21875910 DOI: 10.1161/circulationaha.111.034470] [Citation(s) in RCA: 376] [Impact Index Per Article: 28.9] [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: 01/13/2023]
Abstract
BACKGROUND Angiotensin II (ATII), a potent vasoconstrictor, causes hypertension, promotes infiltration of myelomonocytic cells into the vessel wall, and stimulates both vascular and inflammatory cell NADPH oxidases. The predominant source of reactive oxygen species, eg, vascular (endothelial, smooth muscle, adventitial) versus phagocytic NADPH oxidase, and the role of myelomonocytic cells in mediating arterial hypertension have not been defined yet. METHODS AND RESULTS Angiotensin II (1 mg · kg(-1) · d(-1) for 7 days) increased the number of both CD11b(+)Gr-1(low)F4/80(+) macrophages and CD11b(+)Gr-1(high)F4/80(-) neutrophils in mouse aorta (verified by flow cytometry). Selective ablation of lysozyme M-positive (LysM(+)) myelomonocytic cells by low-dose diphtheria toxin in mice with inducible expression of the diphtheria toxin receptor (LysM(iDTR) mice) reduced the number of monocytes in the circulation and limited ATII-induced infiltration of these cells into the vascular wall, whereas the number of neutrophils was not reduced. Depletion of LysM(+) cells attenuated ATII-induced blood pressure increase (measured by radiotelemetry) and vascular endothelial and smooth muscle dysfunction (assessed by aortic ring relaxation studies) and reduced vascular superoxide formation (measured by chemiluminescence, cytochrome c assay, and oxidative fluorescence microtopography) and the expression of NADPH oxidase subunits gp91(phox) and p67(phox) (assessed by Western blot and mRNA reverse-transcription polymerase chain reaction). Adoptive transfer of wild-type CD11b(+)Gr-1(+) monocytes into depleted LysM(iDTR) mice reestablished ATII-induced vascular dysfunction, oxidative stress, and arterial hypertension, whereas transfer of CD11b(+)Gr-1(+) neutrophils or monocytes from gp91(phox) or ATII receptor type 1 knockout mice did not. CONCLUSIONS- Infiltrating monocytes with a proinflammatory phenotype and macrophages rather than neutrophils appear to be essential for ATII-induced vascular dysfunction and arterial hypertension.
Collapse
Affiliation(s)
- Philip Wenzel
- 2(nd) Medical Clinic, University Medical Center Mainz, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Knorr M, Wenzel P, Kossmann S, Hausding M, Schuhmacher S, Stratmann J, Yogev N, Oelze M, Grabbe S, Jonuleit H, Becker C, Daiber A, Waisman A, Münzel T. CIRCULATING AND INFILTRATING MONOCYTIC CELLS MEDIATE ANGIOTENSIN-II INDUCED ARTERIAL HYPERTENSION. J Am Coll Cardiol 2011. [DOI: 10.1016/s0735-1097(11)61561-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
8
|
Oelze M, Knorr M, Schuhmacher S, Heeren T, Otto C, Schulz E, Reifenberg K, Wenzel P, Münzel T, Daiber A. Vascular dysfunction in streptozotocin-induced experimental diabetes strictly depends on insulin deficiency. J Vasc Res 2011; 48:275-84. [PMID: 21273782 DOI: 10.1159/000320627] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 08/20/2010] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE In previous studies we and others have shown that streptozotocin (STZ)-induced diabetes in rats is associated with vascular oxidative stress and dysfunction. In the present study, we sought to determine whether vascular dysfunction and oxidative stress strictly depend on insulin deficiency. METHODS The effects of insulin (2.5 U/day s.c., 2 weeks) therapy on vascular disorders in STZ-induced (60 mg/kg i.v., 8 weeks) diabetes mellitus (type I) were studied in Wistar rats. The contribution of NADPH oxidase to overall oxidative stress was investigated by in vivo (30 mg/kg/day s.c., 4 days) and in vitro treatment with apocynin. RESULTS Insulin therapy completely normalized blood glucose, body weight, vascular dysfunction and oxidative stress as well as increased cardiac reactive oxygen and nitrogen species formation in diabetic rats, although diabetes was already established for 6 weeks before insulin therapy was started for the last 2 weeks of the total treatment interval. Apocynin normalized cardiac NADPH oxidase activity, and L-NAME effects suggest a role for uncoupled endothelial nitric oxide synthase in diabetic vascular complications. CONCLUSIONS Our findings indicate that STZ-induced diabetes is a model of insulin-dependent diabetes (type 1) and that cardiovascular complications are probably not associated with systemic toxic side effects of STZ.
Collapse
Affiliation(s)
- Matthias Oelze
- Second Medical Clinic, Department of Cardiology, Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Schuhmacher S, Foretz M, Knorr M, Jansen T, Hortmann M, Wenzel P, Oelze M, Kleschyov AL, Daiber A, Keaney JF, Wegener G, Lackner K, Münzel T, Viollet B, Schulz E. α1AMP-activated protein kinase preserves endothelial function during chronic angiotensin II treatment by limiting Nox2 upregulation. Arterioscler Thromb Vasc Biol 2011; 31:560-6. [PMID: 21205985 DOI: 10.1161/atvbaha.110.219543] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Besides its well-described metabolic effects, vascular AMP-activated protein kinase (AMPK) can activate endothelial NO synthase, promotes angiogenesis, and limits endothelial cell apoptosis. The current study was designed to study the effects of α1AMPK deletion during vascular disease in vivo. METHODS AND RESULTS Chronic angiotensin II infusion at low subpressor doses caused a mild endothelial dysfunction that was significantly aggravated in α1AMPK-knockout mice. Unexpectedly, this endothelial dysfunction was not associated with decreased NO content, because NO levels measured by serum nitrite or electron paramagnetic resonance were even increased. However, because of parallel superoxide production, NO was consumed under production of peroxynitrite in angiotensin II-treated α1AMPK-knockout mice, associated with NADPH oxidase activation and Nox2 upregulation. As Nox2 is also a component of phagocyte NADPH oxidases, we found a vascular upregulation of several proinflammatory markers, including inducible NO synthase, vascular cell adhesion molecule-1, and cyclooxygenase-2. Cotreatment with the NADPH oxidase inhibitor apocynin was able to prevent vascular inflammation and also partially restored endothelial function in α1AMPK-knockout mice. CONCLUSIONS Our data indicate that in vivo α1AMPK deletion leads to Nox2 upregulation, resulting in endothelial dysfunction and vascular inflammation. This implicates basal AMPK activity as a protective, redox-regulating element in vascular homeostasis.
Collapse
Affiliation(s)
- Swenja Schuhmacher
- Department of Cardiology, II Medizinische Klinik und Poliklinik, Universitätsmedizin Mainz, Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Jansen T, Hortmann M, Oelze M, Opitz B, Steven S, Schell R, Knorr M, Karbach S, Schuhmacher S, Wenzel P, Münzel T, Daiber A. Conversion of biliverdin to bilirubin by biliverdin reductase contributes to endothelial cell protection by heme oxygenase-1—evidence for direct and indirect antioxidant actions of bilirubin. J Mol Cell Cardiol 2010; 49:186-95. [DOI: 10.1016/j.yjmcc.2010.04.011] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 04/14/2010] [Accepted: 04/15/2010] [Indexed: 12/23/2022]
|
11
|
Knorr M, Oelze M, Schuhmacher S, Wenzel P, Hochmuth C, Steven S, Heeren T, Stalleiken D, Muenzel T, Daiber A. Effects of PETN and ISDN on vascular dysfunction and oxidative stress in an experimental model of Diabetes. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.571.9] [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)
- Maike Knorr
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| | - Matthias Oelze
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| | | | - Philip Wenzel
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| | | | - Sebastian Steven
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| | - Tjebo Heeren
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| | | | - Thomas Muenzel
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| | - Andreas Daiber
- Division of Molecular CardiologyUniversity Hospital MainzMainzGermany
| |
Collapse
|
12
|
Schwaninger A, Wallraven C, Schuhmacher S, Buelthoff HH. News on facial views from humans and machine. J Vis 2010. [DOI: 10.1167/3.9.837] [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: 11/24/2022] Open
|
13
|
Schuhmacher S, Wenzel P, Schulz E, Oelze M, Mang C, Kamuf J, Gori T, Jansen T, Knorr M, Karbach S, Hortmann M, Mäthner F, Bhatnagar A, Förstermann U, Li H, Münzel T, Daiber A. Pentaerythritol tetranitrate improves angiotensin II-induced vascular dysfunction via induction of heme oxygenase-1. Hypertension 2010; 55:897-904. [PMID: 20157049 DOI: 10.1161/hypertensionaha.109.149542] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [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
The organic nitrate pentaerythritol tetranitrate is devoid of nitrate tolerance, which has been attributed to the induction of the antioxidant enzyme heme oxygenase (HO)-1. With the present study, we tested whether chronic treatment with pentaerythritol tetranitrate can improve angiotensin II-induced vascular oxidative stress and dysfunction. In contrast to isosorbide-5 mononitrate (75 mg/kg per day for 7 days), treatment with pentaerythritol tetranitrate (15 mg/kg per day for 7 days) improved the impaired endothelial and smooth muscle function and normalized vascular and cardiac reactive oxygen species production (mitochondria, NADPH oxidase activity, and uncoupled endothelial NO synthase), as assessed by dihydroethidine staining, lucigenin-enhanced chemiluminescence, and quantification of dihydroethidine oxidation products in angiotensin II (1 mg/kg per day for 7 days)-treated rats. The antioxidant features of pentaerythritol tetranitrate were recapitulated in spontaneously hypertensive rats. In addition to an increase in HO-1 protein expression, pentaerythritol tetranitrate but not isosorbide-5 mononitrate normalized vascular reactive oxygen species formation and augmented aortic protein levels of the tetrahydrobiopterin-synthesizing enzymes GTP-cyclohydrolase I and dihydrofolate reductase in angiotensin II-treated rats, thereby preventing endothelial NO synthase uncoupling. Haploinsufficiency of HO-1 completely abolished the beneficial effects of pentaerythritol tetranitrate in angiotensin II-treated mice, whereas HO-1 induction by hemin (25 mg/kg) mimicked the effect of pentaerythritol tetranitrate. Improvement of vascular function in this particular model of arterial hypertension by pentaerythritol tetranitrate largely depends on the induction of the antioxidant enzyme HO-1 and identifies pentaerythritol tetranitrate, in contrast to isosorbide-5 mononitrate, as an organic nitrate able to improve rather than to worsen endothelial function.
Collapse
Affiliation(s)
- Swenja Schuhmacher
- Johannes Gutenberg University Hospital, 2nd Medical Clinic, Molecular Cardiology, Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Schuhmacher S, Schulz E, Oelze M, König A, Roegler C, Lange K, Sydow L, Kawamoto T, Wenzel P, Münzel T, Lehmann J, Daiber A. A new class of organic nitrates: investigations on bioactivation, tolerance and cross-tolerance phenomena. Br J Pharmacol 2009; 158:510-20. [PMID: 19563531 DOI: 10.1111/j.1476-5381.2009.00303.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND AND PURPOSE The chronic use of organic nitrates is limited by serious side effects including oxidative stress, nitrate tolerance and/or endothelial dysfunction. The side effects and potency of nitroglycerine depend on mitochondrial aldehyde dehydrogenase (ALDH-2). We sought to determine whether this concept can be extended to a new class of organic nitrates with amino moieties (aminoalkyl nitrates). EXPERIMENTAL APPROACH Vasodilator potency of the organic nitrates, in vitro tolerance and in vivo tolerance (after continuous infusion for 3 days) were assessed in wild-type and ALDH-2 knockout mice by isometric tension studies. Mitochondrial oxidative stress was analysed by L-012-dependent chemiluminescence and protein tyrosine nitration. KEY RESULTS Aminoethyl nitrate (AEN) showed an almost similar potency to glyceryl trinitrate (GTN), even though it is only a mononitrate. AEN-dependent vasodilatation was mediated by cGMP and nitric oxide. In contrast to triethanolamine trinitrate (TEAN) and GTN, AEN bioactivation did not depend on ALDH-2 and caused no in vitro tolerance. In vivo treatment with TEAN and GTN, but not with AEN, induced cross-tolerance to acetylcholine (ACh)-dependent and GTN-dependent relaxation. Although all nitrates tested induced tolerance to themselves, only TEAN and GTN significantly increased mitochondrial oxidative stress in vitro and in vivo. CONCLUSIONS AND IMPLICATIONS The present results demonstrate that not all high potency nitrates are bioactivated by ALDH-2 and that high potency of a given nitrate is not necessarily associated with induction of oxidative stress or nitrate tolerance. Obviously, there are distinct pathways for bioactivation of organic nitrates, which for AEN may involve xanthine oxidoreductase rather than P450 enzymes.
Collapse
Affiliation(s)
- S Schuhmacher
- II. Medizinische Klinik, Labor für Molekulare Kardiologie, Johannes-Gutenberg-Universität, Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
|
16
|
Daiber A, Oelze M, Wenzel P, Dias Wickramanayake JM, Schuhmacher S, Jansen T, Lackner KJ, Torzewski M, Münzel T. Nitrate tolerance as a model of vascular dysfunction: Roles for mitochondrial aldehyde dehydrogenase and mitochondrial oxidative stress. Pharmacol Rep 2009; 61:33-48. [DOI: 10.1016/s1734-1140(09)70005-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 01/08/2009] [Indexed: 01/22/2023]
|
17
|
Schulz E, Dopheide J, Schuhmacher S, Thomas SR, Chen K, Daiber A, Wenzel P, Münzel T, Keaney JF. Suppression of the JNK pathway by induction of a metabolic stress response prevents vascular injury and dysfunction. Circulation 2008; 118:1347-57. [PMID: 18809807 DOI: 10.1161/circulationaha.108.784298] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Oxidative injury and dysfunction of the vascular endothelium are early and causal features of many vascular diseases. Single antioxidant strategies to prevent vascular injury have met with mixed results. METHODS AND RESULTS Here, we report that induction of a metabolic stress response with adenosine monophosphate kinase (AMPK) prevents oxidative endothelial cell injury. This response is characterized by stabilization of the mitochondrion and increased mitochondrial biogenesis, resulting in attenuation of oxidative c-Jun N-terminal kinase (JNK) activation. We report that peroxisome proliferator coactivator 1alpha is a key downstream target of AMPK that is both necessary and sufficient for the metabolic stress response and JNK attenuation. Moreover, induction of the metabolic stress response in vivo attenuates reactive oxygen species-mediated JNK activation and endothelial dysfunction in response to angiotensin II in wild-type mice but not in animals lacking either the endothelial isoform of AMPK or peroxisome proliferator coactivator 1alpha. CONCLUSIONS These data highlight AMPK and peroxisome proliferator coactivator 1alpha as potential therapeutic targets for the amelioration of endothelial dysfunction and, as a consequence, vascular disease.
Collapse
Affiliation(s)
- Eberhard Schulz
- Department of Cardiology, 2nd Medical Clinic of the University Hospital Mainz, Johannes Gutenberg University, Mainz, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Wenzel P, Schulz E, Oelze M, Müller J, Schuhmacher S, Alhamdani MSS, Debrezion J, Hortmann M, Reifenberg K, Fleming I, Münzel T, Daiber A. AT1-receptor blockade by telmisartan upregulates GTP-cyclohydrolase I and protects eNOS in diabetic rats. Free Radic Biol Med 2008; 45:619-26. [PMID: 18539157 DOI: 10.1016/j.freeradbiomed.2008.05.009] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2008] [Revised: 04/30/2008] [Accepted: 05/09/2008] [Indexed: 12/22/2022]
Abstract
Several enzymatic sources of reactive oxygen species (ROS) were described as potential reasons of eNOS uncoupling in diabetes mellitus. In the present study, we investigated the effects of AT1-receptor blockade with chronic telmisartan (25 mg/kg/day, 6.5 weeks) therapy on expression of the BH4-synthesizing enzyme GTP-cyclohydrolase I (GCH-I), eNOS uncoupling, and endothelial dysfunction in streptozotocin (STZ, 60 mg/kg iv, 7 weeks)-induced diabetes mellitus (type I). Telmisartan therapy did not modify blood glucose and body weight. Aortas from diabetic animals had vascular dysfunction as revealed by isometric tension studies (acetylcholine and nitroglycerin potency). Vascular and cardiac ROS produced by NADPH oxidase, mitochondria, eNOS, and xanthine oxidase were increased in the diabetic group as was the expression of NADPH oxidase subunits at the protein level. The expression of GCH-I and the phosphorylation of eNOS at Ser1177 was decreased by STZ treatment. Therapy with telmisartan normalized these parameters. The present study demonstrates for the first time that AT1-receptor blockade by telmisartan prevents downregulation of the BH4 synthase GCH-I and thereby eNOS uncoupling in experimental diabetes. In addition, telmisartan inhibits activation of superoxide sources like NADPH oxidase, mitochondria, and xanthine oxidase. These effects may explain the beneficial effects of telmisartan on endothelial dysfunction in diabetes.
Collapse
Affiliation(s)
- Philip Wenzel
- 2nd Medical Clinic, Department of Cardiology, Johannes Gutenberg University, Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Wenzel P, Mollnau H, Oelze M, Schulz E, Wickramanayake JMD, Müller J, Schuhmacher S, Hortmann M, Baldus S, Gori T, Brandes RP, Münzel T, Daiber A. First evidence for a crosstalk between mitochondrial and NADPH oxidase-derived reactive oxygen species in nitroglycerin-triggered vascular dysfunction. Antioxid Redox Signal 2008; 10:1435-47. [PMID: 18522491 DOI: 10.1089/ars.2007.1969] [Citation(s) in RCA: 123] [Impact Index Per Article: 7.7] [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: 11/13/2022]
Abstract
Chronic nitroglycerin treatment results in development of nitrate tolerance associated with endothelial dysfunction (ED). We sought to clarify how mitochondria- and NADPH oxidase (Nox)-derived reactive oxygen species (ROS) contribute to nitrate tolerance and nitroglycerin-induced ED. Nitrate tolerance was induced by nitroglycerin infusion in male Wistar rats (100 microg/h/4 day) and in C57/Bl6, p47(phox/) and gp91(phox/) mice (50 microg/h/4 day). Protein and mRNA expression of Nox subunits were unaltered by chronic nitroglycerin treatment. Oxidative stress was determined in vascular rings and mitochondrial fractions of nitroglycerin-treated animals by L-012 enhanced chemiluminescence, revealing a dominant role of mitochondria for nitrate tolerance development. Isometric tension studies revealed that genetic deletion or inhibition (apocynin, 0.35 mg/h/4 day) of Nox improved ED, whereas nitrate tolerance was unaltered. Vice versa, nitrate tolerance was attenuated by co-treatment with the respiratory chain complex I inhibitor rotenone (100 microg/h/4 day) or the mitochondrial permeability transition pore blocker cyclosporine A (50 microg/h/4 day). Both compounds improved ED, suggesting a link between mitochondrial and Nox-derived ROS. Mitochondrial respiratory chain-derived ROS are critical for the development of nitrate tolerance, whereas Nox-derived ROS mediate nitrate tolerance-associated ED. This suggests a crosstalk between mitochondrial and Nox-derived ROS with distinct mechanistic effects and sites for pharmacological intervention.
Collapse
Affiliation(s)
- Philip Wenzel
- 2nd Medical Clinic, Department of Cardiology, Johannes Gutenberg University, Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Wenzel P, Schuhmacher S, Kienhöfer J, Müller J, Hortmann M, Oelze M, Schulz E, Treiber N, Kawamoto T, Scharffetter-Kochanek K, Münzel T, Bürkle A, Bachschmid MM, Daiber A. Manganese superoxide dismutase and aldehyde dehydrogenase deficiency increase mitochondrial oxidative stress and aggravate age-dependent vascular dysfunction. Cardiovasc Res 2008; 80:280-9. [PMID: 18596060 DOI: 10.1093/cvr/cvn182] [Citation(s) in RCA: 157] [Impact Index Per Article: 9.8] [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: 01/13/2023] Open
Abstract
AIMS Imbalance between pro- and antioxidant species (e.g. during aging) plays a crucial role for vascular function and is associated with oxidative gene regulation and modification. Vascular aging is associated with progressive deterioration of vascular homeostasis leading to reduced relaxation, hypertrophy, and a higher risk of thrombotic events. These effects can be explained by a reduction in free bioavailable nitric oxide that is inactivated by an age-dependent increase in superoxide formation. In the present study, mitochondria as a source of reactive oxygen species (ROS) and the contribution of manganese superoxide dismutase (MnSOD, SOD-2) and aldehyde dehydrogenase (ALDH-2) were investigated. METHODS AND RESULTS Age-dependent effects on vascular function were determined in aortas of C57/Bl6 wild-type (WT), ALDH-2(-/-), MnSOD(+/+), and MnSOD(+/-) mice by isometric tension measurements in organ chambers. Mitochondrial ROS formation was measured by luminol (L-012)-enhanced chemiluminescence and 2-hydroxyethidium formation with an HPLC-based assay in isolated heart mitochondria. ROS-mediated mitochondrial DNA (mtDNA) damage was detected by a novel and modified version of the fluorescent-detection alkaline DNA unwinding (FADU) assay. Endothelial dysfunction was observed in aged C57/Bl6 WT mice in parallel to increased mitochondrial ROS formation and oxidative mtDNA damage. In contrast, middle-aged ALDH-2(-/-) mice showed a marked vascular dysfunction that was similar in old ALDH-2(-/-) mice suggesting that ALDH-2 exerts age-dependent vasoprotective effects. Aged MnSOD(+/-) mice showed the most pronounced phenotype such as severely impaired vasorelaxation, highest levels of mitochondrial ROS formation and mtDNA damage. CONCLUSION The correlation between mtROS formation and acetylcholine-dependent relaxation revealed that mitochondrial radical formation significantly contributes to age-dependent endothelial dysfunction.
Collapse
Affiliation(s)
- Philip Wenzel
- Second Medical Clinic, Department of Cardiology, Johannes Gutenberg University, Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Daiber A, Wenzel P, Schuhmacher S, Kienhöfer J, Oelze M, Schulz E, Münzel T, Bürkle A, Bachschmid M. MnSOD and ALDH‐2 deficiency potentiate aging‐associated vascular dysfunction, mitochondrial oxidative stress and mtDNA strand breaks. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.471.10] [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)
- Andreas Daiber
- 2nd Medical Clinics ‐ Molecular CardiologyJohannes Gutenberg University HospitalMainzGermany
| | - Philip Wenzel
- 2nd Medical Clinics ‐ Molecular CardiologyJohannes Gutenberg University HospitalMainzGermany
| | - Swenja Schuhmacher
- 2nd Medical Clinics ‐ Molecular CardiologyJohannes Gutenberg University HospitalMainzGermany
| | | | - Matthias Oelze
- 2nd Medical Clinics ‐ Molecular CardiologyJohannes Gutenberg University HospitalMainzGermany
| | - Eberhard Schulz
- 2nd Medical Clinics ‐ Molecular CardiologyJohannes Gutenberg University HospitalMainzGermany
| | - Thomas Münzel
- 2nd Medical Clinics ‐ Molecular CardiologyJohannes Gutenberg University HospitalMainzGermany
| | | | | |
Collapse
|
22
|
Wenzel P, Müller J, Zurmeyer S, Schuhmacher S, Schulz E, Oelze M, Pautz A, Kawamoto T, Wojnowski L, Kleinert H, Münzel T, Daiber A. ALDH-2 deficiency increases cardiovascular oxidative stress--evidence for indirect antioxidative properties. Biochem Biophys Res Commun 2007; 367:137-43. [PMID: 18157936 DOI: 10.1016/j.bbrc.2007.12.089] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2007] [Accepted: 12/14/2007] [Indexed: 11/25/2022]
Abstract
Mitochondrial aldehyde dehydrogenase (ALDH-2) reduces reactive oxygen species (ROS) formation related to toxic aldehydes; additionally, it provides a bioactivating pathway for nitroglycerin. Since acetaldehyde, nitroglycerin, and doxorubicin treatment provoke mitochondrial oxidative stress, we used ALDH-2(-/-) mice and purified recombinant human ALDH-2 to test the hypothesis that ALDH-2 has an indirect antioxidant function in mitochondria. Antioxidant capacity of purified ALDH-2 was comparable to equimolar doses of glutathione, cysteine, and dithiothreitol; mitochondrial oxidative stress was comparable in C57Bl6 and ALDH-2(-/-) mice after acute challenges with nitroglycerin or doxorubicin, whereas chronic acetaldehyde, nitroglycerin, and doxorubicin treatment dose-dependently increased mitochondrial ROS formation and impaired endothelial function to a greater extent in ALDH-2(-/-) mice. Maximal nitroglycerin dose applied in vivo lead to a "super-desensitized" nitroglycerin response in isolated ALDH-2(-/-) aortas, inaccessible in C57Bl6 mice. Our results suggest that ALDH-2 has an indirect antioxidative property independent of its thiol-moiety in disease states of cardiovascular oxidative stress.
Collapse
Affiliation(s)
- Philip Wenzel
- II. Medizinische Klinik, Labor für Molekulare Kardiologie, Johannes-Gutenberg-Universität Mainz, Langenbeck Str. 1, 55131 Mainz, Germany
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Brenner W, Schuhmacher S, Becker M, Fischer R, Pahernik S, Thüroff JW. 393: Could the Active Tumor Suppressor PTEN Function as a Prognostic Marker for Metastasis in Renal Cell Carcinoma? J Urol 2006. [DOI: 10.1016/s0022-5347(18)32649-1] [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: 10/17/2022]
|