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Altun HY, Secilmis M, Yang F, Akgul Caglar T, Vatandaslar E, Toy MF, Vilain S, Mann GE, Öztürk G, Eroglu E. Visualizing hydrogen peroxide and nitric oxide dynamics in endothelial cells using multispectral imaging under controlled oxygen conditions. Free Radic Biol Med 2024; 221:89-97. [PMID: 38735541 DOI: 10.1016/j.freeradbiomed.2024.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/04/2024] [Accepted: 05/10/2024] [Indexed: 05/14/2024]
Abstract
The complex interplay between hydrogen peroxide (H2O2) and nitric oxide (NO) in endothelial cells presents challenges due to technical limitations in simultaneous measurement, hindering the elucidation of their direct relationship. Previous studies have yielded conflicting findings regarding the impact of H2O2 on NO production. To address this problem, we employed genetically encoded biosensors, HyPer7 for H2O2 and geNOps for NO, allowing simultaneous imaging in single endothelial cells. Optimization strategies were implemented to enhance biosensor performance, including camera binning, temperature regulation, and environmental adjustments to mimic physiological normoxia. Our results demonstrate that under ambient oxygen conditions, H2O2 exhibited no significant influence on NO production. Subsequent exploration under physiological normoxia (5 kPa O2) revealed distinct oxidative stress levels characterized by reduced basal HyPer7 signals, enhanced H2O2 scavenging kinetics, and altered responses to pharmacological treatment. Investigation of the relationship between H2O2 and NO under varying oxygen conditions revealed a lack of NO response to H2O2 under hyperoxia (18 kPa O2) but a modest NO response under physiological normoxia (5 kPa O2). Importantly, the NO response was attenuated by l-NAME, suggesting activation of eNOS by endogenous H2O2 generation upon auranofin treatment. Our study highlights the intricate interplay between H2O2 and NO within the endothelial EA.hy926 cell line, emphasizing the necessity for additional research within physiological contexts due to differential response observed under physiological normoxia (5 kPa O2). This further investigation is essential for a comprehensive understanding of the H2O2 and NO signaling considering the physiological effects of ambient O2 levels involved.
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Affiliation(s)
- Hamza Yusuf Altun
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey; Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, 34956, Istanbul, Turkey
| | - Melike Secilmis
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey; Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, 34956, Istanbul, Turkey
| | - Fan Yang
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Tuba Akgul Caglar
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey; Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, 34956, Istanbul, Turkey
| | - Emre Vatandaslar
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey
| | - Muhammed Fatih Toy
- School of Engineering and Natural Science, Istanbul Medipol University, 34810, Istanbul, Turkey
| | - Sven Vilain
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey.
| | - Giovanni E Mann
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine & Sciences, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London, SE1 9NH, UK.
| | - Gürkan Öztürk
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey; Physiology Department, School of Medicine, Bolu Abant Izzet Baysal University (BAIBU), 14200, Bolu, Türkiye.
| | - Emrah Eroglu
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, 34810, Istanbul, Turkey; Molecular Biology, Genetics, and Bioengineering Program, Sabanci University, 34956, Istanbul, Turkey.
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Xanthis V, Mantso T, Dimtsi A, Pappa A, Fadouloglou VE. Human Aldehyde Dehydrogenases: A Superfamily of Similar Yet Different Proteins Highly Related to Cancer. Cancers (Basel) 2023; 15:4419. [PMID: 37686694 PMCID: PMC10650815 DOI: 10.3390/cancers15174419] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/30/2023] [Accepted: 09/01/2023] [Indexed: 09/10/2023] Open
Abstract
The superfamily of human aldehyde dehydrogenases (hALDHs) consists of 19 isoenzymes which are critical for several physiological and biosynthetic processes and play a major role in the organism's detoxification via the NAD(P) dependent oxidation of numerous endogenous and exogenous aldehyde substrates to their corresponding carboxylic acids. Over the last decades, ALDHs have been the subject of several studies as it was revealed that their differential expression patterns in various cancer types are associated either with carcinogenesis or promotion of cell survival. Here, we attempt to provide a thorough review of hALDHs' diverse functions and 3D structures with particular emphasis on their role in cancer pathology and resistance to chemotherapy. We are especially interested in findings regarding the association of structural features and their changes with effects on enzymes' functionalities. Moreover, we provide an updated outline of the hALDHs inhibitors utilized in experimental or clinical settings for cancer therapy. Overall, this review aims to provide a better understanding of the impact of ALDHs in cancer pathology and therapy from a structural perspective.
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Affiliation(s)
| | | | | | | | - Vasiliki E. Fadouloglou
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece
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Meunier M, Yammine A, Bettaieb A, Plenchette S. Nitroglycerin: a comprehensive review in cancer therapy. Cell Death Dis 2023; 14:323. [PMID: 37173331 PMCID: PMC10182021 DOI: 10.1038/s41419-023-05838-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 04/21/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023]
Abstract
Nitroglycerin (NTG) is a prodrug that has long been used in clinical practice for the treatment of angina pectoris. The biotransformation of NTG and subsequent release of nitric oxide (NO) is responsible for its vasodilatating property. Because of the remarkable ambivalence of NO in cancer disease, either protumorigenic or antitumorigenic (partly dependent on low or high concentrations), harnessing the therapeutic potential of NTG has gain interest to improve standard therapies in oncology. Cancer therapeutic resistance remains the greatest challenge to overcome in order to improve the management of cancer patients. As a NO releasing agent, NTG has been the subject of several preclinical and clinical studies used in combinatorial anticancer therapy. Here, we provide an overview of the use of NTG in cancer therapy in order to foresee new potential therapeutic avenues.
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Affiliation(s)
- Mélina Meunier
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC), EA7269, Université de Bourgogne, Dijon, France
- LIIC, EPHE, PSL Research University, Paris, France
| | - Aline Yammine
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC), EA7269, Université de Bourgogne, Dijon, France
- LIIC, EPHE, PSL Research University, Paris, France
| | - Ali Bettaieb
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC), EA7269, Université de Bourgogne, Dijon, France
- LIIC, EPHE, PSL Research University, Paris, France
| | - Stéphanie Plenchette
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC), EA7269, Université de Bourgogne, Dijon, France.
- LIIC, EPHE, PSL Research University, Paris, France.
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Chen X, Gui S, Deng D, Dong L, Zhang L, Wei D, Jiang J, Ge H, Liu P, Lv M, Li Y. Alcohol flushing syndrome is significantly associated with intracranial aneurysm rupture in the Chinese Han population. Front Neurol 2023; 14:1118980. [PMID: 37006480 PMCID: PMC10065193 DOI: 10.3389/fneur.2023.1118980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 03/02/2023] [Indexed: 03/19/2023] Open
Abstract
ObjectiveAlthough alcohol flushing syndrome (AFS) has been associated with various diseases, its association with intracranial aneurysm rupture (IAR) is unclear. We aimed to examine this association in the Chinese Han population.MethodsWe retrospectively reviewed Chinese Han patients with intracranial aneurysms who were evaluated and treated at our institution between January 2020 and December 2021. AFS was determined using a semi-structured telephone interview. Clinical data and aneurysm characteristics were assessed. Univariate and multivariate logistic regression were conducted to determine independent factors associated with aneurysmal rupture.ResultsA total of 1,170 patients with 1,059 unruptured and 236 ruptured aneurysms were included. The incidence of aneurysm rupture was significantly higher in patients without AFS (p < 0.001). Meanwhile, there was a significantly difference between the AFS and non-AFS group in habitual alcohol consumption (10.5 vs. 27.2%, p < 0.001). In the univariate analyses, AFS [odds ratio (OR) 0.49; 95% confidence interval (CI), 0.34–0.72] was significantly associated with IAR. In the multivariate analysis, AFS was an independent predictor of IAR (OR 0.50; 95%, CI, 0.35–0.71). Multivariate analysis revealed that AFS was an independent predictor of IAR in both habitual (OR 0.11; 95% CI, 0.03–0.45) and non-habitual drinkers (OR 0.69; 95% CI, 0.49–0.96).ConclusionAlcohol flushing syndrome may be a novel clinical marker to assess the risk of IAR. The association between AFS and IAR exists independently of alcohol consumption. Further single nucleotide polymorphism testing and molecular biology studies are warranted.
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Affiliation(s)
- Xiheng Chen
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Siming Gui
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Dingwei Deng
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Linggen Dong
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Longhui Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Dachao Wei
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Jia Jiang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Huijian Ge
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Peng Liu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
| | - Ming Lv
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
- *Correspondence: Ming Lv,
| | - Youxiang Li
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Engineering Research Center for Interventional Neuroradiology, Beijing, China
- Youxiang Li,
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Lan X, Wang Z, Zeng Z, Yao H, Xu W, Zhang Y. Association of Different Combinations of ALDH2 rs671, APOE rs429358, rs7412 Polymorphisms with Hypertension in Middle-Aged and Elderly People: A Case-Control Study. Int J Gen Med 2023; 16:915-927. [PMID: 36938306 PMCID: PMC10017832 DOI: 10.2147/ijgm.s402437] [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: 12/23/2022] [Accepted: 02/27/2023] [Indexed: 03/12/2023] Open
Abstract
Background Hypertensive patients have a younger trend, and studies on the role of genetic factors in hypertension susceptibility have been inconsistent. Aldehyde dehydrogenases 2 (ALDH2) and apolipoprotein E (APOE) are involved in the pathophysiological processes of hypertension. To investigate the relationship of ALDH2 and APOE polymorphisms with hypertension in middle-aged (30-59 years old) and elderly (≥60 years old) persons. Methods Two thousand six hundred and ten hypertensive patients and 1921 controls were included (between 30 and 100 years old). The genotypes of common polymorphisms in APOE and ALDH2 genes (APOE rs429358, rs7412, and ALDH2 rs671) of the subjects were analyzed by polymerase-chain reaction (PCR)-microarray. Statistical analyses (Student's t-test, Mann-Whitney U-test, χ 2 test, and logistic regression analysis) were performed with SPSS v21.0. Results There were 4531 participants (66.60 ± 12.10 years old) in this study, including 3057 (67.5%) males and 1474 (32.5%) females. There were no significant differences in distributions of ALDH2 rs671, APOE rs429358/rs7412 genotypes and alleles between hypertensive patients and controls. Persons with ALDH2 rs671 G/A or A/A genotype were less likely to have hypertension (G/A+A/A vs G/G: gender-, age-, smoking-, and drinking-adjusted OR 0.885, 95% CI 0.785-0.997, P=0.045), while ALDH2 rs671 A/A+APOE rs429358 or rs7412 wild-type genotype may decrease the risk of hypertension. In middle-aged group, ALDH2 rs671 G/A+APOE rs429358 T/C carriers (adjusted OR 0.547, 95% CI 0.350-0.856, P=0.008), and ALDH2 rs671 A/A+APOE rs7412 C/C genotypes (adjusted OR 0.567, 95% CI 0.361-0.891, P=0.014) were less likely to have hypertension. In elderly group, APOE rs7412 T/T carriers were more likely to have hypertension (rs671 T/T vs C/C: adjusted OR 4.755, 95% CI 1.075-21.027, P=0.040; rs671 T/T vs C/C or C/T: adjusted OR 4.734, 95% CI 1.071-20.928, P=0.040). Conclusion Polymorphism-polymorphism interactions of ALDH2 rs671 and APOE rs429358/rs7412 may effect on hypertension susceptibility. Different genotypes comparison shows different roles in middle-aged and elderly people, respectively.
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Affiliation(s)
- Xinping Lan
- Center for Cardiovascular Diseases, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Engineering and Technology Research Center for Molecular Diagnostics of Cardiovascular Diseases, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou, People’s Republic of China
- Correspondence: Xinping Lan, Center for Cardiovascular Diseases, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, No. 63 Huangtang Road, Meijiang District, Meizhou, People’s Republic of China, Tel +753-2131-057, Email
| | - Zhenchang Wang
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou, People’s Republic of China
- Department of Emergency Medicine, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
| | - Zifeng Zeng
- Center for Cardiovascular Diseases, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Engineering and Technology Research Center for Molecular Diagnostics of Cardiovascular Diseases, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou, People’s Republic of China
| | - Huaqing Yao
- Center for Cardiovascular Diseases, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Engineering and Technology Research Center for Molecular Diagnostics of Cardiovascular Diseases, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou, People’s Republic of China
| | - Weiyong Xu
- Center for Cardiovascular Diseases, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Engineering and Technology Research Center for Molecular Diagnostics of Cardiovascular Diseases, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou, People’s Republic of China
| | - Yuxian Zhang
- Center for Cardiovascular Diseases, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Engineering and Technology Research Center for Molecular Diagnostics of Cardiovascular Diseases, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou, People’s Republic of China
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Zhang S, Luo W, Pan T, Xie J, Xu Z, Fang Y. ALDH2 rs671 Polymorphism Likely a Risk Factor for Hemorrhagic Stroke: A Hospital-Based Study. Int J Gen Med 2023; 16:1471-1478. [PMID: 37114072 PMCID: PMC10128869 DOI: 10.2147/ijgm.s409183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
Background Hypertension is the main risk factor for hemorrhagic stroke. Aldehyde dehydrogenase 2 (ALDH2) may inhibit the occurrence of hypertension by anti-oxidative stress and vascular dilation. The purpose was to investigate the relationship of ALDH2 polymorphisms with hemorrhagic stroke in Hakka Chinese. Methods A total of 329 patients with hemorrhagic stroke and 515 controls were enrolled, and medical records (smoking and drinking history, hypertension, and diabetes) were collected. The genotypes of ALDH2 rs671 of the two groups were detected and analyzed. Results The proportion of the ALDH2 rs671 G/G, G/A, and A/A genotype in patients with hemorrhagic stroke was 55.9%, 37.4%, and 6.7%, respectively, while those were 65.0%, 30.7%, and 4.3% in controls, respectively. There was statistically significant difference in ALDH2 rs671 genotypes distribution (P=0.021) and alleles distribution (P=0.005) between patients and controls. Among hemorrhagic stroke patients, no statistically significant differences were observed between patients with ALDH2 different genotypes. Logistic regression analysis showed that there was significantly high risk of hemorrhagic stroke in men (male vs female: adjusted OR 1.711, 95% CI 1.154-2.538, P=0.008), the presence of hypertension (with vs without hypertension: adjusted OR 16.095, 95% CI 10.958-23.641, P<0.001), and the presence of ALDH2 rs671 G/A genotype (G/A vs G/G: adjusted OR 1.679, 95% CI 1.151-2.450, P=0.007) or A/A genotype (A/A vs G/G: adjusted OR 2.516, 95% CI 1.132-5.591, P=0.024). Conclusion ALDH2 rs671 polymorphism likely a risk factor for hemorrhagic stroke.
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Affiliation(s)
- Songsheng Zhang
- Intensive Care Unit, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Correspondence: Songsheng Zhang, Intensive Care Unit, Meizhou People’s Hospital, No. 63 Huangtang Road, Meizhou, Guangdong Province, People’s Republic of China, Email
| | - Weiwen Luo
- Intensive Care Unit, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
| | - Tingjun Pan
- Intensive Care Unit, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
| | - Jieyao Xie
- Intensive Care Unit, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
| | - Zhou Xu
- Intensive Care Unit, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
| | - Yuquan Fang
- Intensive Care Unit, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Precision Medicine and Clinical Translational Research of Hakka Population, Meizhou People’s Hospital, Meizhou Academy of Medical Sciences, Meizhou, People’s Republic of China
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Sevimli G, Alston AE, Funk F, Flühmann B, Malli R, Graier WF, Eroglu E. Probing Subcellular Iron Availability with Genetically Encoded Nitric Oxide Biosensors. BIOSENSORS 2022; 12:903. [PMID: 36291039 PMCID: PMC9599561 DOI: 10.3390/bios12100903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/13/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Cellular iron supply is required for various biochemical processes. Measuring bioavailable iron in cells aids in obtaining a better understanding of its biochemical activities but is technically challenging. Existing techniques have several constraints that make precise localization difficult, and the lack of a functional readout makes it unclear whether the tested labile iron is available for metalloproteins. Here, we use geNOps; a ferrous iron-dependent genetically encoded fluorescent nitric oxide (NO) biosensor, to measure available iron in cellular locales. We exploited the nitrosylation-dependent fluorescence quenching of geNOps as a direct readout for cellular iron absorption, distribution, and availability. Our findings show that, in addition to ferrous iron salts, the complex of iron (III) with N,N'-bis (2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED) can activate the iron (II)-dependent NO probe within intact cells. Cell treatment for only 20 min with iron sucrose was also sufficient to activate the biosensor in the cytosol and mitochondria significantly; however, ferric carboxymaltose failed to functionalize the probe, even after 2 h of cell treatment. Our findings show that the geNOps approach detects available iron (II) in cultured cells and can be applied to assay functional iron (II) at the (sub)cellular level.
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Affiliation(s)
- Gulsah Sevimli
- Molecular Biology, Genetics and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul 34956, Turkey
- Department of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria
| | | | - Felix Funk
- CSL Vifor Ltd., Flughofstrasse 61, CH-8152 Glattbrugg, Switzerland
| | - Beat Flühmann
- CSL Vifor Ltd., Flughofstrasse 61, CH-8152 Glattbrugg, Switzerland
| | - Roland Malli
- Department of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed Graz, Mozartgasse 12/II, 8010 Graz, Austria
- Next Generation Fluorescence Imaging Inc., 8010 Graz, Austria
| | - Wolfgang F. Graier
- Department of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed Graz, Mozartgasse 12/II, 8010 Graz, Austria
- Next Generation Fluorescence Imaging Inc., 8010 Graz, Austria
| | - Emrah Eroglu
- Molecular Biology, Genetics and Bioengineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul 34956, Turkey
- Department of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul 34810, Turkey
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PROPHYLACTIC EFFECT OF NITRIC OXIDE DONORS ON RAT MODELS OF EGFR INHIBITORS-INDUCED CUTANEOUS TOXICITIES. J Invest Dermatol 2022; 142:3052-3061.e8. [PMID: 35618045 DOI: 10.1016/j.jid.2022.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 04/19/2022] [Accepted: 04/26/2022] [Indexed: 11/20/2022]
Abstract
Epidermal growth factor receptor inhibitors (EGFRIs) have been established as first-line standard-of-care therapies for non-small cell lung cancer (NSCLC) but are frequently accompanied by adverse dermatological effects, in particular, acneiform rash. There is no effective clinical intervention, partially because of its poorly understood etiology. Here, we show that inhibition of EGFR initiated keratinocyte HaCaT cell cycle arrest and apoptosis, which fueled a robust secondary inflammatory response. Rats gavaged with EGFRI showed a phenotype similar to that of clinical patients, which was in line with the interrupted functions observed in HaCaT keratinocytes. We found that a nitric oxide (NO) donor, nitroglycerin (GTN), was a feasible treatment alternative for EGFRI-induced rash. Restoration of epidermal extracellular signal-regulated kinase (ERK) and a reduction in STAT3 signaling via GTN treatment rescued the cellular functions that had been damaged in vitro and further ameliorated the rash in rat models. In addition, the efficacy of GTN was superior to that of existing clinical interventions. These data highlighted the importance of epidermal EGFR signaling and led to the identification of a small-molecule NO donor as a mediator that can maintain EGFR pathway functions during anti-EGFR therapies, providing a therapeutic anchor point for adverse EGFRI-induced skin effects.
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Liu T, Schroeder H, Power GG, Blood AB. A physiologically relevant role for NO stored in vascular smooth muscle cells: A novel theory of vascular NO signaling. Redox Biol 2022; 53:102327. [PMID: 35605454 PMCID: PMC9126848 DOI: 10.1016/j.redox.2022.102327] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/16/2022] [Accepted: 04/29/2022] [Indexed: 01/16/2023] Open
Abstract
S-nitrosothiols (SNO), dinitrosyl iron complexes (DNIC), and nitroglycerine (NTG) dilate vessels via activation of soluble guanylyl cyclase (sGC) in vascular smooth muscle cells. Although these compounds are often considered to be nitric oxide (NO) donors, attempts to ascribe their vasodilatory activity to NO-donating properties have failed. Even more puzzling, many of these compounds have vasodilatory potency comparable to or even greater than that of NO itself, despite low membrane permeability. This raises the question: How do these NO adducts activate cytosolic sGC when their NO moiety is still outside the cell? In this review, we classify these compounds as ‘nitrodilators’, defined by their potent NO-mimetic vasoactivities despite not releasing requisite amounts of free NO. We propose that nitrodilators activate sGC via a preformed nitrodilator-activated NO store (NANOS) found within the vascular smooth muscle cell. We reinterpret vascular NO handling in the framework of this NANOS paradigm, and describe the knowledge gaps and perspectives of this novel model.
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10
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Nitric oxide biosensor uncovers diminished ferrous iron-dependency of cultured cells adapted to physiological oxygen levels. Redox Biol 2022; 53:102319. [PMID: 35525027 PMCID: PMC9079701 DOI: 10.1016/j.redox.2022.102319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/08/2022] [Accepted: 04/18/2022] [Indexed: 01/18/2023] Open
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11
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Multitarget Antioxidant NO-Donor Organic Nitrates: A Novel Approach to Overcome Nitrates Tolerance, an Ex Vivo Study. Antioxidants (Basel) 2022; 11:antiox11010166. [PMID: 35052670 PMCID: PMC8773138 DOI: 10.3390/antiox11010166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/05/2022] [Accepted: 01/14/2022] [Indexed: 12/04/2022] Open
Abstract
Chronic use of glyceryl trinitrate (GTN) is limited by serious side effects, such as tolerance and endothelial dysfunction of coronary and resistance arteries. Although GTN is used as a drug since more than 130 years, the mechanisms of the vasodilatory effects and of tolerance development to organic nitrates are still incompletely elucidated. New synthesized organic nitrates with and without antioxidant properties were characterized for their ex vivo tolerance profile, in order to investigate the oxidative stress hypothesis of nitrate tolerance. The organic nitrates studied showed different vasodilation and tolerance profiles, probably due to the ability or inability of the compounds to interact with the aldehyde dehydrogenase-2 enzyme (ALDH-2) involved in bioactivation. Furthermore, nitrooxy derivatives endowed with antioxidant properties did not determine the onset of tolerance, even if bioactivated by ALDH-2. The results of this study could be further evidence of the involvement of ALDH-2 in the development of nitrate tolerance. Moreover, the behavior of organic nitrates with antioxidant properties supports the hypothesis of the involvement of ROS in inactivating ALDH-2.
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12
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Naphatthalung J, Chairuk P, Yorsin S, Kanokwiroon K, Radenahmad N, Jansakul C. Decreased body-fat accumulation and increased vasorelaxation to glyceryl trinitrate in middle-aged male rats following six-weeks consumption of coconut milk protein. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e20510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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13
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Lopez M, Malacarne PF, Gajos-Draus A, Ding X, Daiber A, Lundberg JO, Offermanns S, Brandes RP, Rezende F. Vascular biotransformation of organic nitrates is independent of cytochrome P450 monooxygenases. Br J Pharmacol 2021; 178:1495-1506. [PMID: 33450066 DOI: 10.1111/bph.15362] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 11/02/2020] [Accepted: 12/07/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND AND PURPOSE Organic nitrates such as nitroglycerin (NTG) or pentaerythritol tetranitrate (PETN) have been used for over a century in the treatment of angina or ischaemic heart disease. These compounds are prodrugs which release their nitrovasodilators upon enzymic bioactivation by aldehyde dehydrogenase (ALDH2) or cytochromes P450 (CYP). Whereas ALDH2 is known to directly activate organic nitrates in vessels, the contribution of vascular CYPs is unknown and was studied here. EXPERIMENTAL APPROACH As all CYPs depend on cytochrome P450 reductase (POR) as electron donor, we generated a smooth muscle cell-specific, inducible knockout mouse of POR (smcPOR-/- ) to investigate the contribution of POR/CYP to vascular biotransformation of organic nitrates. KEY RESULTS Microsomes containing recombinant CYPs expressed in human vascular tissues released nitrite from NTG and PETN with CYP2C9 and CYP2C8 being most efficient. SFK525, a CYP suicide inhibitor, blocked this effect. smcPOR-/- mice exhibited no obvious cardiovascular phenotype (normal cardiac weight and endothelium-dependent relaxation) and plasma and vascular nitrite production was similar to control (CTL) animals. NTG- and PETN-induced relaxation of isolated endothelium-intact or endothelium-denuded vessels were identical between CTL and smcPOR-/- . Likewise, nitrite release from organic nitrates in aortic rings was not affected by deletion of POR in smooth muscle cells (SMCs). In contrast, inhibition of ALDH2 by benomyl (10 μM) inhibited NTG-induced nitrite production and relaxation. Deletion of POR did not modulate this response. CONCLUSIONS AND IMPLICATIONS Our data suggest that metabolism by vascular CYPs does not contribute to the pharmacological function of organic nitrates.
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Affiliation(s)
- Melina Lopez
- Institute for Cardiovascular Physiology, Faculty of Medicine, Goethe University, Frankfurt am Main, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhein Main, Frankfurt am Main, Germany
| | - Pedro F Malacarne
- Institute for Cardiovascular Physiology, Faculty of Medicine, Goethe University, Frankfurt am Main, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhein Main, Frankfurt am Main, Germany
| | - Anna Gajos-Draus
- Department of Clinical Physiology, National Science Centre, Kraków, Poland
| | - Xinxin Ding
- Department of Pharmacology and Toxicology, College of Pharmacy, The University of Arizona, Tucson, Arizona, USA
| | - Andreas Daiber
- German Center for Cardiovascular Research (DZHK), Partner site Rhein Main, Frankfurt am Main, Germany.,Zentrum für Kardiologie - Kardiologie 1, Labor für Moleculare Kardiologie, Johannes Gutenberg University, Mainz, Germany
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Stefan Offermanns
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Ralf P Brandes
- Institute for Cardiovascular Physiology, Faculty of Medicine, Goethe University, Frankfurt am Main, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhein Main, Frankfurt am Main, Germany
| | - Flávia Rezende
- Institute for Cardiovascular Physiology, Faculty of Medicine, Goethe University, Frankfurt am Main, Germany.,German Center for Cardiovascular Research (DZHK), Partner site Rhein Main, Frankfurt am Main, Germany
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14
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Pisarenko O, Studneva I. Modulating the Bioactivity of Nitric Oxide as a Therapeutic Strategy in Cardiac Surgery. J Surg Res 2020; 257:178-188. [PMID: 32835951 DOI: 10.1016/j.jss.2020.07.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/29/2020] [Accepted: 07/11/2020] [Indexed: 12/29/2022]
Abstract
Cardiac surgery, including cardioplegic arrest and extracorporeal circulation, causes endothelial dysfunction, which can lead to no-reflow phenomenon and reduction of myocardial pump function. Nitric oxide (NO) deficiency is involved in this pathologic process, thereby providing a fundamental basis for the use of NO replacement therapy. Presently used drugs and additives to cardioplegic and heart preservation solutions are not able to reliably protect endothelial cells and cardiomyocytes from ischemia-reperfusion injury. This review discusses promising NO-releasing compounds of various chemical classes for cardioplegia and reperfusion, which effectively maintain NO homeostasis under experimental conditions, and presents the mechanisms of their action on the cardiovascular system. Incomplete preclinical studies and a lack of toxicity assessment, however, hinder translation of these drug candidates into the clinic. Perspectives for modulation of endothelial function using NO-mediated mechanisms are discussed. They are based on the cardioprotective potential of targeting vascular gap junctions and endothelial ion channels, intracoronary administration of progenitor cells, and endothelial-specific microRNAs. Some of these strategies may provide important therapeutic benefits for human cardiovascular interventions.
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Affiliation(s)
- Oleg Pisarenko
- National Medical Research Center for Cardiology, Institute of Experimental Cardiology, Moscow, Russian Federation.
| | - Irina Studneva
- National Medical Research Center for Cardiology, Institute of Experimental Cardiology, Moscow, Russian Federation
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15
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Chen CH, Ferreira JCB, Joshi AU, Stevens MC, Li SJ, Hsu JHM, Maclean R, Ferreira ND, Cervantes PR, Martinez DD, Barrientos FL, Quintanares GHR, Mochly-Rosen D. Novel and prevalent non-East Asian ALDH2 variants; Implications for global susceptibility to aldehydes' toxicity. EBioMedicine 2020; 55:102753. [PMID: 32403082 PMCID: PMC7218264 DOI: 10.1016/j.ebiom.2020.102753] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/21/2020] [Accepted: 03/21/2020] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Aldehyde dehydrogenase 2 (ALDH2) catalyzes the detoxification of aliphatic aldehydes, including acetaldehyde. About 45% of Han Chinese (East Asians), accounting for 8% of humans, carry a single point mutation in ALDH2*2 (E504K) that leads to accumulation of toxic reactive aldehydes. METHODS Sequencing of a small Mexican cohort and a search in the ExAC genomic database for additional ALDH2 variants common in various ethnic groups was set to identify missense variants. These were evaluated in vitro, and in cultured cells expressing these new and common variants. FINDINGS In a cohort of Hispanic donors, we identified 2 novel mutations in ALDH2. Using the ExAC genomic database, we found these identified variants and at least three other ALDH2 variants with a single point mutation among Latino, African, South Asian, and Finnish ethnic groups, at a frequency of >5/1000. Although located in different parts of the ALDH2 molecule, these common ALDH2 mutants exhibited a significant reduction in activity compared with the wild type enzyme in vitro and in 3T3 cells overexpressing each of the variants, and a greater ethanol-induced toxicity. As Alda-1, previously identified activator, did not activate some of the new mutant ALDH2 enzymes, we continued the screen and identified Alda-64, which is effective in correcting the loss of activity in most of these new and common ALDH2 variants. INTERPRETATION Since ~80% of the world population consumes ethanol and since acetaldehyde accumulation contributes to a variety of diseases, the identification of additional inactivating variants of ALDH2 in different ethnic groups may help develop new 'precision medicine' for carriers of these inactive ALDH2.
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Affiliation(s)
- Che-Hong Chen
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA
| | - Julio C B Ferreira
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA; Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Amit U Joshi
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA
| | - Matthew C Stevens
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA
| | - Sin-Jin Li
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA; Department of Animal Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Jade H-M Hsu
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA; Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Rory Maclean
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA
| | - Nikolas D Ferreira
- Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Pilar R Cervantes
- Translational Medicine and Innovation Unit, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Diana D Martinez
- Translational Medicine and Innovation Unit, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Fernando L Barrientos
- Translational Medicine and Innovation Unit, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Gibran H R Quintanares
- Translational Medicine and Innovation Unit, Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México City, México
| | - Daria Mochly-Rosen
- Department of Chemical and Systems Biology, School of Medicine, Stanford University, CA, USA.
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16
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Mizuno Y, Harada E, Kugimiya F, Shono M, Kusumegi I, Yoshimura M, Kinoshita K, Yasue H. East Asians Variant Mitochondrial Aldehyde Dehydrogenase 2 Genotype Exacerbates Nitrate Tolerance in Patients With Coronary Spastic Angina. Circ J 2020; 84:479-486. [PMID: 32009064 DOI: 10.1253/circj.cj-19-0989] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Aldehyde dehydrogenase 2 (ALDH2) plays a central role in the biotransformation of glyceryl trinitrate (GTN) or nitroglycerin, which is widely used for the treatment of coronary artery disease (CAD). The deficient variant ALDH2 genotype (ALDH2*2) is prevalent among East Asians. This study examined whether there are differences in nitroglycerine-mediated dilation (NMD) and flow-mediated dilation (FMD) response between wildALDH2*1/*1and variantALDH2*2patients with CAD.Methods and Results:The study subjects comprised 55 coronary spastic angina (CSA) patients, confirmed by coronary angiography and intracoronary injection of acetylcholine (42 men and 13 women, mean age 68.0±9.0 years). They underwent NMD and FMD tests in the morning before and after continuous transdermal GTN administration for 48 h. NMD was lower at baseline inALDH2*2than in theALDH2*1/*1group (P=0.0499) and decreased significantly in both groups (P<0.0001 and P<0.0001, respectively) after GTN, with significantly lower levels in theALDH2*2group (P=0.0002). FMD decreased significantly in bothALDH2*1/*1andALDH2*2groups (P<0.0001and P=0.0002, respectively) after continuous GTN administration, with no significant differences between the 2 groups both before and after GTN. CONCLUSIONS Continuous administration of GTN produced endothelial dysfunction as well as nitrate tolerance in bothALDH2*1/1andALDH2*2patients with CSA.ALDH2*2attenuated GTN response and exacerbated GTN tolerance, but not endothelial dysfunction, as compared toALDH2*1/*1in patients with CSA.
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Affiliation(s)
- Yuji Mizuno
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute
| | - Eisaku Harada
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute
| | - Fumihito Kugimiya
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute
| | - Makoto Shono
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute
| | - Izumi Kusumegi
- Cardiovascular Examination Room, Kumamoto Kinoh Hospital
| | - Michihiro Yoshimura
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine
| | | | - Hirofumi Yasue
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute
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17
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Nannelli G, Ziche M, Donnini S, Morbidelli L. Endothelial Aldehyde Dehydrogenase 2 as a Target to Maintain Vascular Wellness and Function in Ageing. Biomedicines 2020; 8:E4. [PMID: 31947800 PMCID: PMC7168060 DOI: 10.3390/biomedicines8010004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 12/28/2019] [Accepted: 12/31/2019] [Indexed: 12/16/2022] Open
Abstract
Endothelial cells are the main determinants of vascular function, since their dysfunction in response to a series of cardiovascular risk factors is responsible for disease progression and further consequences. Endothelial dysfunction, if not resolved, further aggravates the oxidative status and vessel wall inflammation, thus igniting a vicious cycle. We have furthermore to consider the physiological manifestation of vascular dysfunction and chronic low-grade inflammation during ageing, also known as inflammageing. Based on these considerations, knowledge of the molecular mechanism(s) responsible for endothelial loss-of-function can be pivotal to identify novel targets of intervention with the aim of maintaining endothelial wellness and vessel trophism and function. In this review we have examined the role of the detoxifying enzyme aldehyde dehydrogenase 2 (ALDH2) in the maintenance of endothelial function. Its impairment indeed is associated with oxidative stress and ageing, and in the development of atherosclerosis and neurodegenerative diseases. Strategies to improve its expression and activity may be beneficial in these largely diffused disorders.
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Affiliation(s)
- Ginevra Nannelli
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; (G.N.); (S.D.)
| | - Marina Ziche
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
| | - Sandra Donnini
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; (G.N.); (S.D.)
| | - Lucia Morbidelli
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; (G.N.); (S.D.)
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18
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Discordance between eNOS phosphorylation and activation revealed by multispectral imaging and chemogenetic methods. Proc Natl Acad Sci U S A 2019; 116:20210-20217. [PMID: 31527268 DOI: 10.1073/pnas.1910942116] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Nitric oxide (NO) synthesized by the endothelial isoform of nitric oxide synthase (eNOS) is a critical determinant of vascular homeostasis. However, the real-time detection of intracellular NO-a free radical gas-has been difficult, and surrogate markers for eNOS activation are widely utilized. eNOS phosphorylation can be easily measured in cells by probing immunoblots with phosphospecific antibodies. Here, we pursued multispectral imaging approaches using biosensors to visualize intracellular NO and Ca2+ and exploited chemogenetic approaches to define the relationships between NO synthesis and eNOS phosphorylation in cultured endothelial cells. We found that the G protein-coupled receptor agonists adenosine triphosphate (ATP) and histamine promoted rapid increases in eNOS phosphorylation, as did the receptor tyrosine kinase agonists insulin and Vascular Endothelial Growth Factor (VEGF). Histamine and ATP also promoted robust NO formation and increased intracellular Ca2+ By contrast, neither insulin nor VEGF caused any increase whatsoever in intracellular NO or Ca2+-despite eliciting strong eNOS phosphorylation responses. Our findings demonstrate an unexpected and striking discordance between receptor-modulated eNOS phosphorylation and NO formation in endothelial cells. Previous reports in which phosphorylation of eNOS has been studied as a surrogate for enzyme activation may need to be reassessed.
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19
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Nagano T, Ushijima K, Taga N, Takeuchi M, Kawada MA, Aizawa K, Imai Y, Fujimura A. Influence of the aldehyde dehydrogenase 2 polymorphism on the vasodilatory effect of nitroglycerin in infants with congenital heart disease and pulmonary arterial hypertension. Eur J Clin Pharmacol 2019; 75:1361-1367. [PMID: 31250045 DOI: 10.1007/s00228-019-02709-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Accepted: 06/17/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE The influence of the aldehyde dehydrogenase 2 (ALDH2) gene polymorphism on the pharmacokinetics and haemodynamics of nitroglycerin (GTN) was determined in human subjects. METHODS Eighteen infants (nine each with and without ALDH2 gene polymorphism) with congenital heart disease and pulmonary arterial hypertension participated in this study. GTN treatment started at a dose of 2 μg/kg/min, and the dose was escalated by 1-2 μg/kg/min until pulmonary vascular resistance (PVR) was reduced by more than 30%. The plasma GTN concentration and PVR were measured at the end of each infusion period. RESULTS Plasma GTN concentrations were significantly higher in patients with the ALDH2 gene polymorphism than in those without the polymorphism. Conversely, the reduction in PVR was smaller in patients with the ALDH2 gene polymorphism than in those without. CONCLUSIONS These data suggest that the ALDH2 gene polymorphism influences the pharmacokinetics and haemodynamics of GTN in human subjects.
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Affiliation(s)
- Tatsuya Nagano
- Division of Clinical Pharmacology, Department of Pharmacology, Jichi Medical University, Tochigi, 329-0498, Japan.,Department of Anesthesiology and Critical Care Medicine, Jichi Medical University, Tochigi, Japan
| | - Kentaro Ushijima
- Division of Clinical Pharmacology, Department of Pharmacology, Jichi Medical University, Tochigi, 329-0498, Japan.,Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, Yamaguchi, Japan
| | - Naoyuki Taga
- Department of Anesthesiology and Critical Care Medicine, Jichi Medical University, Tochigi, Japan
| | - Mamoru Takeuchi
- Department of Anesthesiology and Critical Care Medicine, Jichi Medical University, Tochigi, Japan
| | - Masa-Aki Kawada
- Division of Pediatric and Congenital Cardiovascular Surgery, Jichi Children's Medical Center Tochigi, Jichi Medical University, Tochigi, Japan
| | - Kenichi Aizawa
- Division of Clinical Pharmacology, Department of Pharmacology, Jichi Medical University, Tochigi, 329-0498, Japan
| | - Yasushi Imai
- Division of Clinical Pharmacology, Department of Pharmacology, Jichi Medical University, Tochigi, 329-0498, Japan
| | - Akio Fujimura
- Division of Clinical Pharmacology, Department of Pharmacology, Jichi Medical University, Tochigi, 329-0498, Japan.
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20
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Liu T, Zhang M, Mukosera GT, Borchardt D, Li Q, Tipple TE, Ishtiaq Ahmed AS, Power GG, Blood AB. L-NAME releases nitric oxide and potentiates subsequent nitroglycerin-mediated vasodilation. Redox Biol 2019; 26:101238. [PMID: 31200239 PMCID: PMC6565607 DOI: 10.1016/j.redox.2019.101238] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/27/2019] [Accepted: 06/02/2019] [Indexed: 12/22/2022] Open
Abstract
L-NG-Nitro arginine methyl ester (L-NAME) has been widely applied for several decades in both basic and clinical research as an antagonist of nitric oxide synthase (NOS). Herein, we show that L-NAME slowly releases NO from its guanidino nitro group. Daily pretreatment of rats with L-NAME potentiated mesenteric vasodilation induced by nitrodilators such as nitroglycerin, but not by NO. Release of NO also occurred with the NOS-inactive enantiomer D-NAME, but not with L-arginine or another NOS inhibitor L-NMMA, consistent with the presence or absence of a nitro group in their structure and their nitrodilator-potentiating effects. Metabolic conversion of the nitro group to NO-related breakdown products was confirmed using isotopically-labeled L-NAME. Consistent with Fenton chemistry, transition metals and reactive oxygen species accelerated the release of NO from L-NAME. Both NO production from L-NAME and its nitrodilator-potentiating effects were augmented under inflammation. NO release by L-NAME can confound its intended NOS-inhibiting effects, possibly by contributing to a putative intracellular NO store in the vasculature. NOS-inhibitor L-NAME is also a precursor of NO. ROS releases NO from the nitro group of L-NAME via Fenton Chemistry. L-NAME potentates nitrodilator-mediated vasodilation. Nitroglycerin may cause vasodilation via activation of an intracellular NO store.
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Affiliation(s)
- Taiming Liu
- Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Meijuan Zhang
- Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - George T Mukosera
- Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Dan Borchardt
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Qian Li
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Trent E Tipple
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | | | - Gordon G Power
- Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Arlin B Blood
- Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA; Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA.
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21
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Eroglu E, Bischof H, Charoensin S, Waldeck-Weiermaier M, Graier WF, Malli R. Real-Time Imaging of Nitric Oxide Signals in Individual Cells Using geNOps. Methods Mol Biol 2019; 1747:23-34. [PMID: 29600448 DOI: 10.1007/978-1-4939-7695-9_3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nitric oxide (NO•) is a versatile signaling molecule which regulates fundamental cellular processes in all domains of life. However, due to the radical nature of NO• it has a very short half-life that makes it challenging to trace its formation, diffusion, and degradation on the level of individual cells. Very recently, we expanded the family of genetically encoded sensors by introducing a novel class of single fluorescent protein-based NO• probes-the geNOps. Once expressed in cells of interest, geNOps selectively respond to NO• by fluorescence quench, which enables real-time monitoring of cellular NO• signals. Here, we describe detailed methods suitable for imaging of NO• signals in mammalian cells. This novel approach may facilitate a broad range of studies to (re)investigate the complex NO• biochemistry in living cells.
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Affiliation(s)
- Emrah Eroglu
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Helmut Bischof
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Suphachai Charoensin
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Markus Waldeck-Weiermaier
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Wolfgang F Graier
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Roland Malli
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria.
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22
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Yasue H, Mizuno Y, Harada E. Association of East Asian Variant Aldehyde Dehydrogenase 2 Genotype (ALDH2*2*) with Coronary Spasm and Acute Myocardial Infarction. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1193:121-134. [PMID: 31368101 DOI: 10.1007/978-981-13-6260-6_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Coronary spasm plays an important role in the pathogenesis of ischemic heart disease, including angina pectoris, acute myocardial infarction (AMI), silent myocardial ischemia, and sudden death. The prevalence of coronary spasm is higher among East Asians probably due to genetic as well as environmental factors. ALDH2 eliminates toxic aldehydes including 4-hydroxy-2-nonenal (4-HNE) derived from lipid peroxidation and acrolein in tobacco smoking as well as ethanol-derived acetaldehyde and thereby protects tissues and cells from oxidative damage. Deficient variant ALDH2*2 genotype is prevalent among East Asians and is a significant risk factor for both coronary spasm and AMI through accumulation of toxic aldehydes, thereby contributing to oxidative stress, endothelial damage, vasoconstriction, and thrombosis. Toxic aldehydes are thus identified as risk factors to be targeted for the treatment of coronary spasm and AMI.
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Affiliation(s)
- Hirofumi Yasue
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute, Kumamoto City, Japan.
| | - Yuji Mizuno
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute, Kumamoto City, Japan
| | - Eisaku Harada
- Division of Cardiovascular Medicine, Kumamoto Kinoh Hospital, Kumamoto Aging Research Institute, Kumamoto City, Japan
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23
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Eroglu E, Charoensin S, Bischof H, Ramadani J, Gottschalk B, Depaoli MR, Waldeck-Weiermair M, Graier WF, Malli R. Genetic biosensors for imaging nitric oxide in single cells. Free Radic Biol Med 2018; 128:50-58. [PMID: 29398285 PMCID: PMC6173299 DOI: 10.1016/j.freeradbiomed.2018.01.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/19/2018] [Accepted: 01/22/2018] [Indexed: 01/16/2023]
Abstract
UNLABELLED Over the last decades a broad collection of sophisticated fluorescent protein-based probes was engineered with the aim to specifically monitor nitric oxide (NO), one of the most important signaling molecules in biology. Here we report and discuss the characteristics and fields of applications of currently available genetically encoded fluorescent sensors for the detection of NO and its metabolites in different cell types. LONG ABSTRACT Because of its radical nature and short half-life, real-time imaging of NO on the level of single cells is challenging. Herein we review state-of-the-art genetically encoded fluorescent sensors for NO and its byproducts such as peroxynitrite, nitrite and nitrate. Such probes enable the real-time visualization of NO signals directly or indirectly on the level of single cells and cellular organelles and, hence, extend our understanding of the spatiotemporal dynamics of NO formation, diffusion and degradation. Here, we discuss the significance of NO detection in individual cells and on subcellular level with genetic biosensors. Currently available genetically encoded fluorescent probes for NO and nitrogen species are critically discussed in order to provide insights in the functionality and applicability of these promising tools. As an outlook we provide ideas for novel approaches for the design and application of improved NO probes and fluorescence imaging protocols.
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Affiliation(s)
- Emrah Eroglu
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Suphachai Charoensin
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Helmut Bischof
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Jeta Ramadani
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Benjamin Gottschalk
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Maria R Depaoli
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Markus Waldeck-Weiermair
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Wolfgang F Graier
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria; BioTechMed Graz, Mozartgasse 12/II, 8010 Graz, Austria
| | - Roland Malli
- Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria; BioTechMed Graz, Mozartgasse 12/II, 8010 Graz, Austria.
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24
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Gatzke N, Hillmeister P, Dülsner A, Güc N, Dawid R, Smith KH, Pagonas N, Bramlage P, Gorath M, Buschmann IR. Nitroglycerin application and coronary arteriogenesis. PLoS One 2018; 13:e0201597. [PMID: 30118486 PMCID: PMC6097676 DOI: 10.1371/journal.pone.0201597] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 07/18/2018] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND In the presence of a coronary occlusion, pre-existing small collateral vessels (arterioles) develop into much larger arteries (biological bypasses) that have the potential to allow a certain level of perfusion distal to the blockage. Termed arteriogenesis, this phenomenon proceeds via a complex combination of events, with nitric oxide (NO) playing an essential role. The aim of this study was to investigate the effects of supplemental administration of NO donors, i.e., short-acting nitroglycerin (NTG) or slow-release pelleted isosorbide dinitrate (ISDN), on collateral development in a repetitive coronary artery occlusion model in rats. METHODS Coronary collateral growth was induced via a repetitive occlusion protocol (ROP) of the left anterior descending coronary artery (LAD) in rats. The primary endpoints were the histological evaluation of rat heart infarct size and ST-segment elevation (ECG-analysis) upon final permanent occlusion of the LAD (experimentally induced myocardial infarction). The effects of NTG or ISDN were also evaluated by administration during 5 days of ROP. We additionally investigated whether concomitant application of NTG can compensate for the anti-arteriogenic effect of acetylsalicylic acid (ASA). RESULTS After 5 days of ROP, the mean infarct size and degree of ST-elevation were only slightly lower than those of the SHAM group; however, after 10 days of the protocol, the ROP group displayed significantly less severe infarct damage, indicating enhanced arteriogenesis. Intermittent NTG application greatly decreased the ST-elevation and infarct size. The ISDN also had a positive effect on arteriogenesis, but not to the same extent as the NTG. Administration of ASA increased the infarct severity; however, concomitant dosing with NTG somewhat attenuated this effect. CONCLUSION Intermittent treatment with the short-acting NTG decreased the size of an experimentally induced myocardial infarct by promoting coronary collateral development. These new insights are of great relevance for future clinical strategies for the treatment of occlusive vascular diseases.
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Affiliation(s)
- Nora Gatzke
- Department for Angiology, Brandenburg Medical School, Campus Brandenburg/Havel, Brandenburg/Havel, Germany
- Department of Cardiology, Charité University Hospital, Campus Virchow, Berlin, Germany
- Center for Cardiovascular Research (CCR) Charité University Hospital, Campus Mitte, Berlin, Germany
| | - Philipp Hillmeister
- Department for Angiology, Brandenburg Medical School, Campus Brandenburg/Havel, Brandenburg/Havel, Germany
- Department of Cardiology, Charité University Hospital, Campus Virchow, Berlin, Germany
- Center for Cardiovascular Research (CCR) Charité University Hospital, Campus Mitte, Berlin, Germany
| | - André Dülsner
- Department of Cardiology, Charité University Hospital, Campus Virchow, Berlin, Germany
- Center for Cardiovascular Research (CCR) Charité University Hospital, Campus Mitte, Berlin, Germany
| | - Nadija Güc
- Department of Cardiology, Charité University Hospital, Campus Virchow, Berlin, Germany
- Center for Cardiovascular Research (CCR) Charité University Hospital, Campus Mitte, Berlin, Germany
| | - Rica Dawid
- Department for Angiology, Brandenburg Medical School, Campus Brandenburg/Havel, Brandenburg/Havel, Germany
| | | | - Nikolaos Pagonas
- Department for Angiology, Brandenburg Medical School, Campus Brandenburg/Havel, Brandenburg/Havel, Germany
| | - Peter Bramlage
- Department for Angiology, Brandenburg Medical School, Campus Brandenburg/Havel, Brandenburg/Havel, Germany
- Institute for Pharmacology and Preventive Medicine, Mahlow, Germany
| | | | - Ivo R. Buschmann
- Department for Angiology, Brandenburg Medical School, Campus Brandenburg/Havel, Brandenburg/Havel, Germany
- Department of Cardiology, Charité University Hospital, Campus Virchow, Berlin, Germany
- Center for Cardiovascular Research (CCR) Charité University Hospital, Campus Mitte, Berlin, Germany
- * E-mail:
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25
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Opelt M, Wölkart G, Eroglu E, Waldeck-Weiermair M, Malli R, Graier WF, Kollau A, Fassett JT, Schrammel A, Mayer B, Gorren ACF. Sustained Formation of Nitroglycerin-Derived Nitric Oxide by Aldehyde Dehydrogenase-2 in Vascular Smooth Muscle without Added Reductants: Implications for the Development of Nitrate Tolerance. Mol Pharmacol 2018; 93:335-343. [PMID: 29358221 DOI: 10.1124/mol.117.110783] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/18/2018] [Indexed: 11/22/2022] Open
Abstract
According to current views, oxidation of aldehyde dehydrogenase-2 (ALDH2) during glyceryltrinitrate (GTN) biotransformation is essentially involved in vascular nitrate tolerance and explains the dependence of this reaction on added thiols. Using a novel fluorescent intracellular nitric oxide (NO) probe expressed in vascular smooth muscle cells (VSMCs), we observed ALDH2-catalyzed formation of NO from GTN in the presence of exogenously added dithiothreitol (DTT), whereas only a short burst of NO, corresponding to a single turnover of ALDH2, occurred in the absence of DTT. This short burst of NO associated with oxidation of the reactive C302 residue in the active site was followed by formation of low-nanomolar NO, even without added DTT, indicating slow recovery of ALDH2 activity by an endogenous reductant. In addition to the thiol-reversible oxidation of ALDH2, thiol-refractive inactivation was observed, particularly under high-turnover conditions. Organ bath experiments with rat aortas showed that relaxation by GTN lasted longer than that caused by the NO donor diethylamine/NONOate, in line with the long-lasting nanomolar NO generation from GTN observed in VSMCs. Our results suggest that an endogenous reductant with low efficiency allows sustained generation of GTN-derived NO in the low-nanomolar range that is sufficient for vascular relaxation. On a longer time scale, mechanism-based, thiol-refractive irreversible inactivation of ALDH2, and possibly depletion of the endogenous reductant, will render blood vessels tolerant to GTN. Accordingly, full reactivation of oxidized ALDH2 may not occur in vivo and may not be necessary to explain GTN-induced vasodilation.
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Affiliation(s)
- Marissa Opelt
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Gerald Wölkart
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Emrah Eroglu
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Markus Waldeck-Weiermair
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Roland Malli
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Wolfgang F Graier
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Alexander Kollau
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - John T Fassett
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Astrid Schrammel
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Bernd Mayer
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
| | - Antonius C F Gorren
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, Karl-Franzens University (M.O., G.W., A.K., J.T.F., A.S., B.M., A.C.F.G.), and Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University Graz (E.E., M.W.-W., R.M., W.F.G.), Graz, Austria
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26
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Eroglu E, Hallström S, Bischof H, Opelt M, Schmidt K, Mayer B, Waldeck-Weiermair M, Graier WF, Malli R. Real-time visualization of distinct nitric oxide generation of nitric oxide synthase isoforms in single cells. Nitric Oxide 2017; 70:59-67. [PMID: 28882669 PMCID: PMC6002809 DOI: 10.1016/j.niox.2017.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 08/23/2017] [Accepted: 09/03/2017] [Indexed: 12/19/2022]
Abstract
The members of the nitric oxide synthase (NOS) family, eNOS, nNOS and iNOS, are well-characterized enzymes. However, due to the lack of suitable direct NO sensors, little is known about the kinetic properties of cellular NO generation by the different nitric oxide synthase isoenzymes. Very recently, we developed a novel class of fluorescent protein-based NO-probes, the geNOps, which allow real-time measurement of cellular NO generation and fluctuation. By applying these genetic NO biosensors to nNOS-, eNOS- and iNOS-expressing HEK293 cells we were able to characterize the respective NO dynamics in single cells that exhibited identical Ca2+ signaling as comparable activator of nNOS and eNOS. Our data demonstrate that upon Ca2+ mobilization nNOS-derived NO signals occur instantly and strictly follow the Ca2+ elevation while NO release by eNOS occurs gradually and sustained. To detect high NO levels in cells expressing iNOS, a new ratiometric probe based on two fluorescent proteins was developed. This novel geNOp variant allows the measurement of the high NO levels in cells expressing iNOS. Moreover, we used this probe to study the L-arginine-dependency of NO generation by iNOS on the level of single cells. Our experiments highlight that the geNOps technology is suitable to detect obvious differences in the kinetics, amplitude and substrate-dependence of cellular NO signals-derived from all three nitric oxide synthase isoforms.
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Affiliation(s)
- Emrah Eroglu
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria.
| | - Seth Hallström
- Institute of Physiological Chemistry, Medical University of Graz, Harrachgasse 21/III, 8010 Graz, Austria.
| | - Helmut Bischof
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Marissa Opelt
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, University of Graz, Humboldtstraße 46/I, 8010 Graz, Austria
| | - Kurt Schmidt
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, University of Graz, Humboldtstraße 46/I, 8010 Graz, Austria
| | - Bernd Mayer
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, University of Graz, Humboldtstraße 46/I, 8010 Graz, Austria
| | - Markus Waldeck-Weiermair
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Wolfgang F Graier
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Roland Malli
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
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27
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Abstract
The increasing understanding of the role of nitric oxide (NO) in cancer biology has generated significant progress in the use of NO donor-based therapy to fight cancer. These advances strongly suggest the potential adoption of NO donor-based therapy in clinical practice, and this has been supported by several clinical studies in the past decade. In this review, we first highlight several types of important NO donors, including recently developed NO donors bearing a dinitroazetidine skeleton, represented by RRx-001, with potential utility in cancer therapy. Special emphasis is then given to the combination of NO donor(s) with other therapies to achieve synergy and to the hybridization of NO donor(s) with an anticancer drug/agent/fragment to enhance the activity or specificity or to reduce toxicity. In addition, we briefly describe inducible NO synthase gene therapy and nanotechnology, which have recently entered the field of NO donor therapy.
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Affiliation(s)
- Zhangjian Huang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University , Nanjing 210009, P. R. China
| | - Junjie Fu
- Department of Medicinal Chemistry, School of Pharmacy, Nanjing Medical University , Nanjing 211166, P.R. China
| | - Yihua Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, China Pharmaceutical University , Nanjing 210009, P. R. China
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28
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Miura T, Nishinaka T, Terada T, Yonezawa K. Vasodilatory effect of nitroglycerin in Japanese subjects with different aldehyde dehydrogenase 2 (ALDH2) genotypes. Chem Biol Interact 2017; 276:40-45. [PMID: 28342890 DOI: 10.1016/j.cbi.2017.03.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 01/31/2017] [Accepted: 03/19/2017] [Indexed: 11/28/2022]
Abstract
The functional genetic polymorphism of aldehyde dehydrogenase 2 (ALDH2) influences the enzymatic activities of its wild type (Glu504 encoded by ALDH2*1) and mutant type (Lys504 encoded by ALDH2*2) proteins. The enzymatic activities of mutant-type ALDH2 are limited compared with those of the wild type. ALDH2 has been suggested as a critical factor for nitroglycerin-mediated vasodilation by some human studies and in vitro studies. Currently, there is no research on direct observations of the vasodilatory effect of nitroglycerin sublingual tablets, which is the generally used dosage form. In the present study, the contribution of ALDH2 to the vasodilatory effect of nitroglycerin sublingual tablets was investigated among three genotype groups (ALDH2*1/*1, ALDH2*1/*2, and ALDH2*2/*2) in Japanese. The results by direct assessments of in vivo nitroglycerin-mediated dilation showed no apparent difference in vasodilation among all genotypes of ALDH2. Furthermore, to analyze the effect of other factors (age and flow-mediated dilation), multiple regression analysis and Pearson's correlation coefficient analysis were carried out. These analyses also indicated that the genotypes of ALDH2 were not related to the degree of vasodilation. These results suggest the existence of other predominant pathway(s) for nitroglycerin biotransformation, at least with regard to clinical nitroglycerin (e.g., a sublingual tablet) in Japanese subjects.
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Affiliation(s)
- Takeshi Miura
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan; Pharmaceutical Education Support Center, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68 Koshien, 9-Bancho, Nishinomiya, Hyogo 663-8179, Japan.
| | - Toru Nishinaka
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
| | - Tomoyuki Terada
- Laboratory of Biochemistry, Faculty of Pharmacy, Osaka Ohtani University, 3-11-1 Nishikiori-kita, Tondabayashi, Osaka 584-8540, Japan
| | - Kazuya Yonezawa
- Department of Clinical Research, National Hospital Organization Hakodate Hospital, 18-16, Kawahara, Hakodate, Hokkaido 041-8512, Japan
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29
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Charoensin S, Eroglu E, Opelt M, Bischof H, Madreiter-Sokolowski CT, Kirsch A, Depaoli MR, Frank S, Schrammel A, Mayer B, Waldeck-Weiermair M, Graier WF, Malli R. Intact mitochondrial Ca 2+ uniport is essential for agonist-induced activation of endothelial nitric oxide synthase (eNOS). Free Radic Biol Med 2017; 102:248-259. [PMID: 27923677 PMCID: PMC5381715 DOI: 10.1016/j.freeradbiomed.2016.11.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/14/2016] [Accepted: 11/28/2016] [Indexed: 12/18/2022]
Abstract
Mitochondrial Ca2+ uptake regulates diverse endothelial cell functions and has also been related to nitric oxide (NO•) production. However, it is not entirely clear if the organelles support or counteract NO• biosynthesis by taking up Ca2+. The objective of this study was to verify whether or not mitochondrial Ca2+ uptake influences Ca2+-triggered NO• generation by endothelial NO• synthase (eNOS) in an immortalized endothelial cell line (EA.hy926), respective primary human umbilical vein endothelial cells (HUVECs) and eNOS-RFP (red fluorescent protein) expressing human embryonic kidney (HEK293) cells. We used novel genetically encoded fluorescent NO• probes, the geNOps, and Ca2+ sensors to monitor single cell NO• and Ca2+ dynamics upon cell treatment with ATP, an inositol 1,4,5-trisphosphate (IP3)-generating agonist. Mitochondrial Ca2+ uptake was specifically manipulated by siRNA-mediated knock-down of recently identified key components of the mitochondrial Ca2+ uniporter machinery. In endothelial cells and the eNOS-RFP expressing HEK293 cells we show that reduced mitochondrial Ca2+ uptake upon the knock-down of the mitochondrial calcium uniporter (MCU) protein and the essential MCU regulator (EMRE) yield considerable attenuation of the Ca2+-triggered NO• increase independently of global cytosolic Ca2+ signals. The knock-down of mitochondrial calcium uptake 1 (MICU1), a gatekeeper of the MCU, increased both mitochondrial Ca2+ sequestration and Ca2+-induced NO• signals. The positive correlation between mitochondrial Ca2+ elevation and NO• production was independent of eNOS phosphorylation at serine1177. Our findings emphasize that manipulating mitochondrial Ca2+ uptake may represent a novel strategy to control eNOS-mediated NO• production.
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Affiliation(s)
- Suphachai Charoensin
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Emrah Eroglu
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Marissa Opelt
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, University of Graz, Austria
| | - Helmut Bischof
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | | | - Andrijana Kirsch
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Maria R Depaoli
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Saša Frank
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Astrid Schrammel
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, University of Graz, Austria
| | - Bernd Mayer
- Institute of Pharmaceutical Sciences, Department of Pharmacology and Toxicology, University of Graz, Austria
| | - Markus Waldeck-Weiermair
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Wolfgang F Graier
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria
| | - Roland Malli
- Institute of Molecular Biology and Biochemistry, Center of Molecular Medicine, Medical University of Graz, Austria.
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