101
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McCune C, Chan SJ, Beio ML, Shen W, Chung WJ, Szczesniak LM, Chai C, Koh SQ, Wong PTH, Berkowitz DB. "Zipped Synthesis" by Cross-Metathesis Provides a Cystathionine β-Synthase Inhibitor that Attenuates Cellular H2S Levels and Reduces Neuronal Infarction in a Rat Ischemic Stroke Model. ACS CENTRAL SCIENCE 2016; 2:242-52. [PMID: 27163055 PMCID: PMC4850510 DOI: 10.1021/acscentsci.6b00019] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Indexed: 05/08/2023]
Abstract
The gaseous neuromodulator H2S is associated with neuronal cell death pursuant to cerebral ischemia. As cystathionine β-synthase (CBS) is the primary mediator of H2S biogenesis in the brain, it has emerged as a potential target for the treatment of stroke. Herein, a "zipped" approach by alkene cross-metathesis into CBS inhibitor candidate synthesis is demonstrated. The inhibitors are modeled after the pseudo-C 2-symmetric CBS product (l,l)-cystathionine. The "zipped" concept means only half of the inhibitor needs be constructed; the two halves are then fused by olefin cross-metathesis. Inhibitor design is also mechanism-based, exploiting the favorable kinetics associated with hydrazine-imine interchange as opposed to the usual imine-imine interchange. It is demonstrated that the most potent "zipped" inhibitor 6S reduces H2S production in SH-SY5Y cells overexpressing CBS, thereby reducing cell death. Most importantly, CBS inhibitor 6S dramatically reduces infarct volume (1 h post-stroke treatment; ∼70% reduction) in a rat transient middle cerebral artery occlusion model for ischemia.
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Affiliation(s)
- Christopher
D. McCune
- Department
of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Su Jing Chan
- Department
of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Matthew L. Beio
- Department
of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Weijun Shen
- Department
of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Woo Jin Chung
- Department
of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Laura M. Szczesniak
- Department
of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Chou Chai
- Neurodegeneration
Research Laboratory, National Neuroscience
Institute, Singapore 308433
| | - Shu Qing Koh
- Department
of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Peter T.-H. Wong
- Department
of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
- (P.T.-H.W.) E-mail:
| | - David B. Berkowitz
- Department
of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
- (D.B.D.) E-mail:
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102
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Li S, Chen S, Yang W, Liao L, Li S, Li J, Zheng Y, Zhu D. Allicin relaxes isolated mesenteric arteries through activation of PKA-K ATP channel in rat. J Recept Signal Transduct Res 2016; 37:17-24. [PMID: 27049346 DOI: 10.3109/10799893.2016.1155065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Allicin is a natural effective organosulfur compound isolated from garlic, which possesses many beneficial properties, such as antibacterial, anti-inflammatory, antimicrobial, hypotensive and hypolipidemic. In the present study, we investigated the effects and the underlying mechanisms of allicin on isolated mesenteric arteries (MAs). We examined MAs relaxation induced by allicin on rat-isolated mesenteric artery (MA) rings, the KATP channels with patch, and the expression of Kir6.1 and SUR2B with western blotting and NO production with Diaminofluorescein-FM diacetate (DAF-FMDA) in rat mesenteric artery smooth muscle cells (MASMCs). The results showed that allicin elicited the dose-dependent vasorelaxation effect with phenylephrine (PE) precontracted rat MA rings. The vasorelaxation effect was endothelium and NO independent but could be diminished by inhibition of PKA and KATP channels in the vascular smooth muscle. Allicin activated KATP channels in rat MASMCs, and the activation of KATP channels was inhibited by the inhibitors of PKA and KATP channels. But allicin had no effect on the expression of KATP subtypes Kir6.1 and SUR2B. These observations suggest that allicin exerts vasorelaxation effect through activation of PKA-KATP-signaling pathway.
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Affiliation(s)
- Shuzhen Li
- a Department of Biopharmaceutical Sciences , College of Pharmacy, Harbin Medical University , PR China
| | - Shuo Chen
- b Department of Biopharmaceutical Sciences , College of Pharmacy, Harbin Medical University-Daqing , PR China , and
| | - Weiwei Yang
- c College of Food Science, Northeast Agricultural University , PR China
| | - Lin Liao
- a Department of Biopharmaceutical Sciences , College of Pharmacy, Harbin Medical University , PR China
| | - Shanshan Li
- a Department of Biopharmaceutical Sciences , College of Pharmacy, Harbin Medical University , PR China
| | - Jiali Li
- a Department of Biopharmaceutical Sciences , College of Pharmacy, Harbin Medical University , PR China
| | - Yaqin Zheng
- a Department of Biopharmaceutical Sciences , College of Pharmacy, Harbin Medical University , PR China
| | - Daling Zhu
- c College of Food Science, Northeast Agricultural University , PR China
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103
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Suematsu M, Nakamura T, Tokumoto Y, Yamamoto T, Kajimura M, Kabe Y. CO-CBS-H2S Axis: From Vascular Mediator to Cancer Regulator. Microcirculation 2016; 23:183-90. [DOI: 10.1111/micc.12253] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 10/29/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Makoto Suematsu
- Department of Biochemistry; Keio University School of Medicine; Japan Science and Technology Agency; ERATO Suematsu Gas Biology Project; Tokyo Japan
| | - Takashi Nakamura
- Department of Biochemistry; Keio University School of Medicine; Japan Science and Technology Agency; ERATO Suematsu Gas Biology Project; Tokyo Japan
| | - Yasuhito Tokumoto
- Department of Biochemistry; Keio University School of Medicine; Japan Science and Technology Agency; ERATO Suematsu Gas Biology Project; Tokyo Japan
| | - Takehiro Yamamoto
- Department of Biochemistry; Keio University School of Medicine; Japan Science and Technology Agency; ERATO Suematsu Gas Biology Project; Tokyo Japan
| | - Mayumi Kajimura
- Department of Biochemistry; Keio University School of Medicine; Japan Science and Technology Agency; ERATO Suematsu Gas Biology Project; Tokyo Japan
| | - Yasuaki Kabe
- Department of Biochemistry; Keio University School of Medicine; Japan Science and Technology Agency; ERATO Suematsu Gas Biology Project; Tokyo Japan
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104
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Kabe Y, Nakane T, Koike I, Yamamoto T, Sugiura Y, Harada E, Sugase K, Shimamura T, Ohmura M, Muraoka K, Yamamoto A, Uchida T, Iwata S, Yamaguchi Y, Krayukhina E, Noda M, Handa H, Ishimori K, Uchiyama S, Kobayashi T, Suematsu M. Haem-dependent dimerization of PGRMC1/Sigma-2 receptor facilitates cancer proliferation and chemoresistance. Nat Commun 2016; 7:11030. [PMID: 26988023 PMCID: PMC4802085 DOI: 10.1038/ncomms11030] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 02/15/2016] [Indexed: 12/16/2022] Open
Abstract
Progesterone-receptor membrane component 1 (PGRMC1/Sigma-2 receptor) is a haem-containing protein that interacts with epidermal growth factor receptor (EGFR) and cytochromes P450 to regulate cancer proliferation and chemoresistance; its structural basis remains unknown. Here crystallographic analyses of the PGRMC1 cytosolic domain at 1.95 Å resolution reveal that it forms a stable dimer through stacking interactions of two protruding haem molecules. The haem iron is five-coordinated by Tyr113, and the open surface of the haem mediates dimerization. Carbon monoxide (CO) interferes with PGRMC1 dimerization by binding to the sixth coordination site of the haem. Haem-mediated PGRMC1 dimerization is required for interactions with EGFR and cytochromes P450, cancer proliferation and chemoresistance against anti-cancer drugs; these events are attenuated by either CO or haem deprivation in cancer cells. This study demonstrates protein dimerization via haem–haem stacking, which has not been seen in eukaryotes, and provides insights into its functional significance in cancer. PGRMC1 binds to EGFR and cytochromes P450, and is known to be involved in cancer proliferation and in drug resistance. Here, the authors determine the structure of the cytosolic domain of PGRMC1, which forms a dimer via haem–haem stacking, and propose how this interaction could be involved in its function.
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Affiliation(s)
- Yasuaki Kabe
- Department of Biochemistry, Keio University School of Medicine, and Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Tokyo 160-8582, Japan
| | - Takanori Nakane
- Department of Medical Chemistry and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan.,Department of Statistical Genetics, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Ikko Koike
- Department of Biochemistry, Keio University School of Medicine, and Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Tokyo 160-8582, Japan
| | - Tatsuya Yamamoto
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, Kyoto 619-0284, Japan
| | - Yuki Sugiura
- Department of Biochemistry, Keio University School of Medicine, and Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Tokyo 160-8582, Japan
| | - Erisa Harada
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, Kyoto 619-0284, Japan
| | - Kenji Sugase
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, Kyoto 619-0284, Japan
| | - Tatsuro Shimamura
- Department of Medical Chemistry and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Mitsuyo Ohmura
- Department of Biochemistry, Keio University School of Medicine, and Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Tokyo 160-8582, Japan
| | - Kazumi Muraoka
- Department of Biochemistry, Keio University School of Medicine, and Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Tokyo 160-8582, Japan
| | - Ayumi Yamamoto
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takeshi Uchida
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - So Iwata
- Department of Medical Chemistry and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan.,JST, Research Acceleration Program, Membrane Protein Crystallography Project, Kyoto 606-8501, Japan
| | - Yuki Yamaguchi
- Department of Biological Information, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama 226-8501, Japan
| | - Elena Krayukhina
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Masanori Noda
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
| | - Hiroshi Handa
- Department of Nanoparticle Translational Research, Tokyo Medical University, Tokyo 160-8402, Japan
| | - Koichiro Ishimori
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Susumu Uchiyama
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan.,Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Okazaki 444-8787, Japan
| | - Takuya Kobayashi
- Department of Medical Chemistry and Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan.,JST, CREST, Kyoto 606-8501, Japan.,Platform for Drug Discovery, Informatics, and Structural Life Science, JST, Kyoto 606-8501, Japan
| | - Makoto Suematsu
- Department of Biochemistry, Keio University School of Medicine, JST, Exploratory Research for Advanced Technology (ERATO), Suematsu Gas Biology Project, Tokyo 160-8582, Japan
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105
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Meininger DJ, Chee-Garza M, Arman HD, Tonzetich ZJ. Gallium(III) Tetraphenylporphyrinates Containing Hydrosulfide and Thiolate Ligands: Structural Models for Sulfur-Bound Iron(III) Hemes. Inorg Chem 2016; 55:2421-6. [DOI: 10.1021/acs.inorgchem.5b02822] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Daniel J. Meininger
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio Texas 78249, United States
| | - Max Chee-Garza
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio Texas 78249, United States
| | - Hadi D. Arman
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio Texas 78249, United States
| | - Zachary J. Tonzetich
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio Texas 78249, United States
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106
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Gai JW, Qin W, Liu M, Wang HF, Zhang M, Li M, Zhou WH, Ma QT, Liu GM, Song WH, Jin J, Ma HS. Expression profile of hydrogen sulfide and its synthases correlates with tumor stage and grade in urothelial cell carcinoma of bladder. Urol Oncol 2016; 34:166.e15-20. [PMID: 26847849 DOI: 10.1016/j.urolonc.2015.06.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 06/27/2015] [Accepted: 06/29/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Hydrogen sulfide (H2S) is a newly discovered gas transmitter. It is synthesized by cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE), and 3-mercaptopyruvate sulfurtransferase (MPST). Endogenous hydrogen sulfide has never been studied in bladder cancer. PURPOSE We evaluated H2S production and its synthases expression levels in transitional cell carcinoma (urothelial cell carcinoma of bladder [UCB]) of human bladder tissue and cell lines. MATERIALS AND METHODS Immunostaining was performed in urothelial cell lines and bladder specimens from 94 patients with UCB of different stages/grades. The expression levels/activities of CBS, CSE, and MPST of specimens and cell lines were analyzed by image semiquantity assay, western blot, and a sulfur-sensitive electrode. We tried to find the correlation between hydrogen sulfide and its synthases with tumor stage in UCB. All experiments were repeated at least 3 times. RESULTS Immunoreactivity for CBS, CSE, and MPST was detected in malignant uroepithelium and muscular layer of all tissues examined and cultured cells. The expression levels of CBS, CSE, and MPST were associated with UCB stage/grade. Muscle-invasive bladder cancer samples showed the highest production of H2S (52.6±2.91 nmol/[mg·min]) among all tested samples and EJ cells (transitional cell carcinoma, grade IIIshowed the highest production of H2S among all tested cell lines (53.3±7.02nmol/[mg·min]). CONCLUSIONS Protein levels and catalytic activities of CBS, CSE, and MPST increased with the increase of malignant degrees in human bladder tissues and human UCB cell lines. Our findings may promote the application of these novel enzymes to UCB diagnosis or treatment.
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Affiliation(s)
- Jun-Wei Gai
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Wei Qin
- Department of orthopedics, Xiangyang Central Hospital, Xiangyang, P.R. China
| | - Miao Liu
- Hedong Center for Disease Control and Prevention, Tianjin, P.R. China
| | - Hai-Feng Wang
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Min Zhang
- Department of Urology, First Hospital of Shanxi Medical University, Taiyuan, P.R. China
| | - Meng Li
- Department of Urology, The People׳s Hospital of Nanpi Country, Nanpi, P.R. China
| | - Wen-Hui Zhou
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Qin-Tong Ma
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Guang-Ming Liu
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Wen-Hui Song
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Jie Jin
- Department of Urology, Peking University First Hospital, The Institute of Urology, Peking University, Beijing, P.R. China
| | - Hong-Shun Ma
- Department of Urology, Tianjin First Central Hospital, Tianjin, P.R. China.
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107
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Luna-Vázquez FJ, Ibarra-Alvarado C, Rojas-Molina A, Romo-Mancillas A, López-Vallejo FH, Solís-Gutiérrez M, Rojas-Molina JI, Rivero-Cruz F. Role of Nitric Oxide and Hydrogen Sulfide in the Vasodilator Effect of Ursolic Acid and Uvaol from Black Cherry Prunus serotina Fruits. Molecules 2016; 21:78. [PMID: 26771591 PMCID: PMC6273102 DOI: 10.3390/molecules21010078] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 12/27/2022] Open
Abstract
The present research aimed to isolate the non-polar secondary metabolites that produce the vasodilator effects induced by the dichloromethane extract of Prunus serotina (P. serotina) fruits and to determine whether the NO/cGMP and the H2S/KATP channel pathways are involved in their mechanism of action. A bioactivity-directed fractionation of the dichloromethane extract of P. serotina fruits led to the isolation of ursolic acid and uvaol as the main non-polar vasodilator compounds. These compounds showed significant relaxant effect on rat aortic rings in an endothelium- and concentration-dependent manner, which was inhibited by NG-nitro-L-arginine methyl ester (L-NAME), DL-propargylglycine (PAG) and glibenclamide (Gli). Additionally, both triterpenes increased NO and H2S production in aortic tissue. Molecular docking studies showed that ursolic acid and uvaol are able to bind to endothelial NOS and CSE with high affinity for residues that form the oligomeric interface of both enzymes. These results suggest that the vasodilator effect produced by ursolic acid and uvaol contained in P. serotina fruits, involves activation of the NO/cGMP and H2S/KATP channel pathways, possibly through direct activation of NOS and CSE.
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Affiliation(s)
- Francisco J Luna-Vázquez
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - César Ibarra-Alvarado
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - Alejandra Rojas-Molina
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - Antonio Romo-Mancillas
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - Fabián H López-Vallejo
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - Mariana Solís-Gutiérrez
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - Juana I Rojas-Molina
- Laboratorio de Investigación Química y Farmacológica de Productos Naturales, Facultad de Química, Universidad Autónoma de Querétaro, Centro Universitario, Querétaro 76010, Mexico.
| | - Fausto Rivero-Cruz
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria s/n, México D.F. 04510, Mexico.
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108
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Basudhar D, Ridnour LA, Cheng R, Kesarwala AH, Heinecke J, Wink DA. Biological signaling by small inorganic molecules. Coord Chem Rev 2016; 306:708-723. [PMID: 26688591 PMCID: PMC4680994 DOI: 10.1016/j.ccr.2015.06.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Small redox active molecules such as reactive nitrogen and oxygen species and hydrogen sulfide have emerged as important biological mediators that are involved in various physiological and pathophysiological processes. Advancement in understanding of cellular mechanisms that tightly regulate both generation and reactivity of these molecules is central to improved management of various disease states including cancer and cardiovascular dysfunction. Imbalance in the production of redox active molecules can lead to damage of critical cellular components such as cell membranes, proteins and DNA and thus may trigger the onset of disease. These small inorganic molecules react independently as well as in a concerted manner to mediate physiological responses. This review provides a general overview of the redox biology of these key molecules, their diverse chemistry relevant to physiological processes and their interrelated nature in cellular signaling.
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Affiliation(s)
- Debashree Basudhar
- Radiation Biology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Lisa A. Ridnour
- Radiation Biology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Robert Cheng
- Radiation Biology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Aparna H. Kesarwala
- Radiation Oncology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Julie Heinecke
- Radiation Biology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - David A. Wink
- Radiation Biology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
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109
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Santoro G, Beltrami R, Kottelat E, Blacque O, Bogdanova AY, Zobi F. N-Nitrosamine-{cis-Re[CO]2}2+ cobalamin conjugates as mixed CO/NO-releasing molecules. Dalton Trans 2016; 45:1504-13. [DOI: 10.1039/c5dt03402g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mixed CO/NO-releasing molecules were prepared by conjugation of the 17-electron rhenium dicarbonyl cis-[Re(CO)2Br4]2− complex to N-nitrosamine modified cyanocobalamin (B12) bio-vectors.
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Affiliation(s)
- Giuseppe Santoro
- Department of Chemistry
- University of Zürich
- CH-8057 Zürich
- Switzerland
| | - Ruben Beltrami
- Department of Chemistry
- University of Fribourg
- CH-1700 Fribourg
- Switzerland
| | - Emmanuel Kottelat
- Department of Chemistry
- University of Fribourg
- CH-1700 Fribourg
- Switzerland
| | - Olivier Blacque
- Department of Chemistry
- University of Zürich
- CH-8057 Zürich
- Switzerland
| | - Anna Yu. Bogdanova
- Institute of Veterinary Physiology
- University of Zürich
- CH-8057 Zürich
- Switzerland
| | - Fabio Zobi
- Department of Chemistry
- University of Fribourg
- CH-1700 Fribourg
- Switzerland
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110
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Small Signaling Molecules and CO-Releasing Molecules (CORMs) for the Modulation of the Cellular Redox Metabolism. OXIDATIVE STRESS IN APPLIED BASIC RESEARCH AND CLINICAL PRACTICE 2016. [DOI: 10.1007/978-3-319-30705-3_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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111
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112
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Meng G, Ma Y, Xie L, Ferro A, Ji Y. Emerging role of hydrogen sulfide in hypertension and related cardiovascular diseases. Br J Pharmacol 2015; 172:5501-11. [PMID: 25204754 PMCID: PMC4667855 DOI: 10.1111/bph.12900] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 08/18/2014] [Accepted: 08/28/2014] [Indexed: 12/31/2022] Open
Abstract
Hydrogen sulfide (H2 S) has traditionally been viewed as a highly toxic gas; however, recent studies have implicated H2 S as a third member of the gasotransmitter family, exhibiting properties similar to NO and carbon monoxide. Accumulating evidence has suggested that H2 S influences a wide range of physiological and pathological processes, among which blood vessel relaxation, cardioprotection and atherosclerosis have been particularly studied. In the cardiovascular system, H2 S production is predominantly catalyzed by cystathionine γ-lyase (CSE). Decreased endogenous H2 S levels have been found in hypertensive patients and animals, and CSE(-/-) mice develop hypertension with age, suggesting that a deficiency in H2 S contributes importantly to BP regulation. H2 S supplementation attenuates hypertension in different hypertensive animal models. The mechanism by which H2 S was originally proposed to attenuate hypertension was by virtue of its action on vascular tone, which may be related to effects on different ion channels. Both H2 S and NO cause vasodilatation and there is cross-talk between these two molecules to regulate BP. Suppression of oxidative stress may also contribute to antihypertensive effects of H2 S. This review also summarizes the state of research on H2 S and hypertension in China. A better understanding of the role of H2 S in hypertension and related cardiovascular diseases will allow novel strategies to be devised for their treatment.
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Affiliation(s)
- Guoliang Meng
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, State Key Laboratory of Reproductive Medicine, Atherosclerosis Research CentreNanjing Medical UniversityNanjingChina
| | - Yan Ma
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, State Key Laboratory of Reproductive Medicine, Atherosclerosis Research CentreNanjing Medical UniversityNanjingChina
| | - Liping Xie
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, State Key Laboratory of Reproductive Medicine, Atherosclerosis Research CentreNanjing Medical UniversityNanjingChina
| | - Albert Ferro
- Department of Clinical PharmacologyCardiovascular DivisionSchool of MedicineKing's College LondonLondonUK
| | - Yong Ji
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, State Key Laboratory of Reproductive Medicine, Atherosclerosis Research CentreNanjing Medical UniversityNanjingChina
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113
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Vicente JB, Colaço HG, Sarti P, Leandro P, Giuffrè A. S-Adenosyl-l-methionine Modulates CO and NO• Binding to the Human H2S-generating Enzyme Cystathionine β-Synthase. J Biol Chem 2015; 291:572-81. [PMID: 26582199 DOI: 10.1074/jbc.m115.681221] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Indexed: 01/11/2023] Open
Abstract
Cystathionine β-synthase (CBS) is a key enzyme in human (patho)physiology with a central role in hydrogen sulfide metabolism. The enzyme is composed of a pyridoxal 5'-phosphate-binding catalytic domain, flanked by the following two domains: a heme-binding N-terminal domain and a regulatory C-terminal domain binding S-adenosyl-l-methionine (AdoMet). CO or NO(•) binding at the ferrous heme negatively modulates the enzyme activity. Conversely, AdoMet binding stimulates CBS activity. Here, we provide experimental evidence for a functional communication between the two domains. We report that AdoMet binding significantly enhances CBS inhibition by CO. Consistently, we observed increased affinity (∼5-fold) and faster association (∼10-fold) of CO to the ferrous heme at physiological AdoMet concentrations. NO(•) binding to reduced CBS was also enhanced by AdoMet, although to a lesser extent (∼2-fold higher affinity) as compared with CO. Importantly, CO and NO(•) binding was unchanged by AdoMet in a truncated form of CBS lacking the C-terminal regulatory domain. These unprecedented observations demonstrate that CBS activation by AdoMet puzzlingly sensitizes the enzyme toward inhibition by exogenous ligands, like CO and NO(•). This further supports the notion that CBS regulation is a complex process, involving the concerted action of multiple physiologically relevant effectors.
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Affiliation(s)
- João B Vicente
- From the Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2781-156 Oeiras, Portugal,
| | - Henrique G Colaço
- the Metabolism and Genetics Group, Research Institute for Medicines, Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal
| | - Paolo Sarti
- the Department of Biochemical Sciences and Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University of Rome, I-00185 Rome, Italy
| | - Paula Leandro
- the Metabolism and Genetics Group, Research Institute for Medicines, Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal, the Department of Biochemistry and Human Biology, Faculty of Pharmacy, University of Lisbon, 1640-003 Lisbon, Portugal, and
| | - Alessandro Giuffrè
- the Institute of Molecular Biology and Pathology, National Research Council of Italy, I-00185 Rome, Italy
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114
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Saund SS, Sosa V, Henriquez S, Nguyen QNN, Bianco CL, Soeda S, Millikin R, White C, Le H, Ono K, Tantillo DJ, Kumagai Y, Akaike T, Lin J, Fukuto JM. The chemical biology of hydropersulfides (RSSH): Chemical stability, reactivity and redox roles. Arch Biochem Biophys 2015; 588:15-24. [PMID: 26519887 DOI: 10.1016/j.abb.2015.10.016] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 10/01/2015] [Accepted: 10/24/2015] [Indexed: 01/08/2023]
Abstract
Recent reports indicate the ubiquitous prevalence of hydropersulfides (RSSH) in mammalian systems. The biological utility of these and related species is currently a matter of significant speculation. The function, lifetime and fate of hydropersulfides will be assuredly based on their chemical properties and reactivity. Thus, to serve as the basis for further mechanistic studies regarding hydropersulfide biology, some of the basic chemical properties/reactivity of hydropersulfides was studied. The nucleophilicity, electrophilicity and redox properties of hydropersulfides were examined under biological conditions. These studies indicate that hydropersulfides can be nucleophilic or electrophilic, depending on the pH (i.e. the protonation state) and can act as good one- and two-electron reductants. These diverse chemical properties in a single species make hydropersulfides chemically distinct from other, well-known sulfur containing biological species, giving them unique and potentially important biological function.
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Affiliation(s)
- Simran S Saund
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Victor Sosa
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Stephanie Henriquez
- Department of Biology, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Q Nhu N Nguyen
- Department of Chemistry, University of California, Davis, One Shield Ave., Davis, CA, 95616, USA
| | | | - Shuhei Soeda
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Robert Millikin
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Corey White
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Henry Le
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Katsuhiko Ono
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis, One Shield Ave., Davis, CA, 95616, USA
| | - Yoshito Kumagai
- Environmental Biology Section, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Takaaki Akaike
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Joseph Lin
- Department of Biology, Sonoma State University, Rohnert Park, CA, 94928, USA.
| | - Jon M Fukuto
- Department of Chemistry, Sonoma State University, Rohnert Park, CA, 94928, USA.
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115
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The mitochondrial carnitine/acylcarnitine carrier is regulated by hydrogen sulfide via interaction with C136 and C155. Biochim Biophys Acta Gen Subj 2015; 1860:20-7. [PMID: 26459002 DOI: 10.1016/j.bbagen.2015.10.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/24/2015] [Accepted: 10/08/2015] [Indexed: 11/20/2022]
Abstract
BACKGROUND The carnitine/acylcarnitine carrier (CAC or CACT) mediates transport of acylcarnitines into mitochondria for the β-oxidation. CAC possesses Cys residues which respond to redox changes undergoing to SH/disulfide interconversion. METHODS The effect of H2S has been investigated on the [(3)H]carnitine/carnitine antiport catalyzed by recombinant or native CAC reconstituted in proteoliposomes. Site-directed mutagenesis was employed for identifying Cys reacting with H2S. RESULTS H2S led to transport inhibition, which was dependent on concentration, pH and time of incubation. Best inhibition with IC50 of 0.70 μM was observed at physiological pH after 30-60 min incubation. At longer times of incubation, inhibition was reversed. After oxidation of the carrier by O2, transport activity was rescued by H2S indicating that the inhibition/activation depends on the initial redox state of the protein. The observed effects were more efficient on the native rat liver transporter than on the recombinant protein. Only the protein containing both C136 and C155 responded to the reagent as the WT. While reduced responses were observed in the mutants containing C136 or C155. Multi-alignment of known mitochondrial carriers, highlighted that only the CAC possesses both Cys residues. This correlates well with the absence of effects of H2S on carriers which does not contain the Cys couple. CONCLUSIONS Altogether, these data demonstrate that H2S regulates the CAC by inhibiting or activating transport on the basis of the redox state of the protein. GENERAL SIGNIFICANCE CAC represents a specific target of H2S among mitochondrial carriers in agreement with the presence of a reactive Cys couple.
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116
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Takagi T, Uchiyama K, Naito Y. The therapeutic potential of carbon monoxide for inflammatory bowel disease. Digestion 2015; 91:13-8. [PMID: 25632911 DOI: 10.1159/000368765] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Inflammatory bowel disease (IBD), encompassing ulcerative colitis and Crohn's disease, are chronic, relapsing and remitting inflammatory disorders of the intestinal tract. Because the precise pathogenesis of IBD remains unclear, it is important to investigate the pathogenesis of IBD and to evaluate new anti-inflammatory strategies. Recent accumulating evidence has suggested that carbon monoxide (CO) may act as an endogenous defensive gaseous molecule to reduce inflammation and tissue injury in various organ injury models, including intestinal inflammation. Furthermore, exogenous CO administration at low concentrations is protective against intestinal inflammation. These data suggest that CO may be a novel therapeutic molecule in patients with IBD. In this review, we present what is currently known regarding the therapeutic potential of CO in intestinal inflammation.
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Affiliation(s)
- Tomohisa Takagi
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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117
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d’Emmanuele di Villa Bianca R, Mitidieri E, Esposito D, Donnarumm E, Russo A, Fusco F, Ianaro A, Mirone V, Cirino G, Russo G, Sorrentino R. Human Cystathionine-β-Synthase Phosphorylation on Serine227 Modulates Hydrogen Sulfide Production in Human Urothelium. PLoS One 2015; 10:e0136859. [PMID: 26368121 PMCID: PMC4569281 DOI: 10.1371/journal.pone.0136859] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 08/10/2015] [Indexed: 12/16/2022] Open
Abstract
Urothelium, the epithelial lining the inner surface of human bladder, plays a key role in bladder physiology and pathology. It responds to chemical, mechanical and thermal stimuli by releasing several factors and mediators. Recently it has been shown that hydrogen sulfide contributes to human bladder homeostasis. Hydrogen sulfide is mainly produced in human bladder by the action of cystathionine-β-synthase. Here, we demonstrate that human cystathionine-β-synthase activity is regulated in a cGMP/PKG-dependent manner through phosphorylation at serine 227. Incubation of human urothelium or T24 cell line with 8-Bromo-cyclic-guanosine monophosphate (8-Br-cGMP) but not dibutyryl-cyclic-adenosine monophosphate (d-cAMP) causes an increase in hydrogen sulfide production. This result is congruous with the finding that PKG is robustly expressed but PKA only weakly present in human urothelium as well as in T24 cells. The cGMP/PKG-dependent phosphorylation elicited by 8-Br-cGMP is selectively reverted by KT5823, a specific PKG inhibitor. Moreover, the silencing of cystathionine-β-synthase in T24 cells leads to a marked decrease in hydrogen sulfide production either in basal condition or following 8-Br-cGMP challenge. In order to identify the phosphorylation site, recombinant mutant proteins of cystathionine-β-synthase in which Ser32, Ser227 or Ser525 was mutated in Ala were generated. The Ser227Ala mutant cystathionine-β-synthase shows a notable reduction in basal biosynthesis of hydrogen sulfide becoming unresponsive to the 8-Br-cGMP challenge. A specific antibody that recognizes the phosphorylated form of cystathionine-β-synthase has been produced and validated by using T24 cells and human urothelium. In conclusion, human cystathionine-β-synthase can be phosphorylated in a PKG-dependent manner at Ser227 leading to an increased catalytic activity.
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Affiliation(s)
- Roberta d’Emmanuele di Villa Bianca
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
- Interdepartmental Centre for Sexual Medicine, University of Naples, Federico II, Via Sergio Pansini 5, Naples, Italy
| | - Emma Mitidieri
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
| | - Davide Esposito
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Via Sergio Pansini 5, Naples, Italy
| | - Erminia Donnarumm
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
| | - Annapina Russo
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
| | - Ferdinando Fusco
- Interdepartmental Centre for Sexual Medicine, University of Naples, Federico II, Via Sergio Pansini 5, Naples, Italy
- Department of Neurosciences, Human Reproduction and Odontostomatology, University of Naples, Federico II, Naples, Italy
| | - Angela Ianaro
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
| | - Vincenzo Mirone
- Interdepartmental Centre for Sexual Medicine, University of Naples, Federico II, Via Sergio Pansini 5, Naples, Italy
- Department of Neurosciences, Human Reproduction and Odontostomatology, University of Naples, Federico II, Naples, Italy
| | - Giuseppe Cirino
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
- Interdepartmental Centre for Sexual Medicine, University of Naples, Federico II, Via Sergio Pansini 5, Naples, Italy
- * E-mail:
| | - Giulia Russo
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
| | - Raffaella Sorrentino
- Department of Pharmacy, University of Naples, Federico II, Via D. Montesano, 49, Naples, Italy
- Interdepartmental Centre for Sexual Medicine, University of Naples, Federico II, Via Sergio Pansini 5, Naples, Italy
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118
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Hydrogen sulfide in cancer: Friend or foe? Nitric Oxide 2015; 50:38-45. [PMID: 26297862 DOI: 10.1016/j.niox.2015.08.004] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 07/26/2015] [Accepted: 08/17/2015] [Indexed: 01/07/2023]
Abstract
Hydrogen sulfide (H2S) is the third gaseous signaling molecule that plays important roles in cancer biological processes. Recent studies indicate that H2S has both pro-cancer and anti-cancer effects. Endogenous H2S can exert pro-cancer functions through induction of angiogenesis regulation of mitochondrial bioenergetics, acceleration of cell cycle progression, and anti-apoptosis mechanisms. Thus, the inhibition of the production of H2S in cancer cells may be a new cancer treatment strategy. In contrast to the pro-cancer effect of H2S, relatively high concentrations of exogenous H2S could suppress the growth of cancer cells by inducing uncontrolled intracellular acidification, inducing cell cycle arrest, and promoting apoptosis. Therefore, H2S donors and H2S-releasing hybrids could be designed and developed as novel anti-cancer drugs. In this review, the production and metabolism of H2S in cancer cells are summarized and the role and mechanism of H2S in cancer development and progression are further discussed.
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119
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Huang B, Chen CT, Chen CS, Wang YM, Hsieh HJ, Wang DL. Laminar shear flow increases hydrogen sulfide and activates a nitric oxide producing signaling cascade in endothelial cells. Biochem Biophys Res Commun 2015. [PMID: 26212441 DOI: 10.1016/j.bbrc.2015.07.115] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Laminar shear flow triggers a signaling cascade that maintains the integrity of endothelial cells (ECs). Hydrogen sulfide (H2S), a new gasotransmitter is regarded as an upstream regulator of nitric oxide (NO). Whether the H2S-generating enzymes are correlated to the enzymes involved in NO production under shear flow conditions remains unclear as yet. In the present study, the cultured ECs were subjected to a constant shear flow (12 dyn/cm(2)) in a parallel flow chamber system. We investigated the expression of three key enzymes for H2S biosynthesis, cystathionine-γ-lyase (CSE), cystathionine-β-synthase (CBS), and 3-mercapto-sulfurtransferase (3-MST). Shear flow markedly increased the level of 3-MST. Shear flow enhanced the production of H2S was determined by NBD-SCN reagent that can bind to cysteine/homocystein. Exogenous treatment of NaHS that can release gaseous H2S, ECs showed an increase of phosphorylation in Akt(S473), ERK(T202/Y204) and eNOS(S1177). This indicated that H2S can trigger the NO-production signaling cascade. Silencing of CSE, CBS and 3-MST genes by siRNA separately attenuated the phosphorylation levels of Akt(S473) and eNOS(S1177) under shear flow conditions. The particular mode of shear flow increased H2S production. The interplay between H2S and NO-generating enzymes were discussed in the present study.
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Affiliation(s)
- Bin Huang
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Center for Biomarkers and Biotech Drugs, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Center for Infectious Disease and Cancer Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Chang-Ting Chen
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chi-Shia Chen
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yun-Ming Wang
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu 30068, Taiwan
| | - Hsyue-Jen Hsieh
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Danny Ling Wang
- Institute of Medical Science, College of Medicine, Tzu Chi University, Hualien County 97004, Taiwan.
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120
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Pulukkody R, Darensbourg MY. Synthetic advances inspired by the bioactive dinitrosyl iron unit. Acc Chem Res 2015; 48:2049-58. [PMID: 26090911 DOI: 10.1021/acs.accounts.5b00215] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Resulting from biochemical iron-NO interactions, dinitrosyl iron complexes (DNICs) are small organometallic-like molecules, considered to serve as vehicles for NO transport and storage in vivo. Formed by the interaction of NO with cellular iron sulfur clusters or with the cellular labile iron pool, DNICs have been documented to be the largest NO-derived adduct in cells, even surpassing the well-known nitrosothiols (RSNOs). Continuing efforts in biological chemistry are aimed at understanding the movement of DNICs in and out of cells, and their important role in NO-induced iron efflux leading to apoptosis in cells. Intrigued by the integrity of the unique dinitrosyl iron unit (DNIU) and the possibility of roles for it in human physiology or medicinal applications, the understanding of fundamental properties such as ligand effects on its ability to switch between two redox levels has been pursued through biomimetic complexes. Using metallodithiolates and N-heterocyclic carbenes (NHCs) as ligands to Fe(NO)2, the synthesis of a library of novel DNICs, in both the oxidized, {Fe(NO)2}(9), and reduced, {Fe(NO)2}(10), forms (Enemark-Feltham notation), offers opportunity to examine structural, reactivity, and spectroscopic features. The raison d'etre for the MN2S2·Fe(NO)2 synthesis development is for the potential to exploit the ease of accessing two redox levels on two different metal sites, a property presumably required for achieving two electron redox processes in base metals. Hence such molecules may be viewed as synthetic analogues of [NiFe]- or [FeFe]-hydrogenase active sites in nature, both of which use bridging thiolates for connection of the two centers. A particular success was the development of an Fe(NO)N2S2·Fe(NO)2(+/0) redox pair for proton reduction electrocatalysis. Monomeric, reduced NHC-DNICs of the L2Fe(NO)2 type are synthesized via the Fe(CO)2(NO)2 precursor, and oxidized thiolate-containing forms are derived from the dimeric (μ-RS)2[Fe(NO)2]2. Monomeric NHC-DNICs are four coordinate, pseudotetrahedral compounds with planar Fe(NO)2 units in which the slightly bent Fe-NO groups are directed symmetrically inward at both redox levels. They serve as stable analogues of biological histidine binding sites. In agreement with IR data, Mössbauer spectroscopic parameters, and DFT computations, the prototypic NHC-DNICs indicate extensive delocalization of the electron density of iron via π-backbonding. Such π-delocalization presents an unusual reaction path for the one electron process of RS(-)/RSSR interconversion. Comparisons with imidazole-DNICs find NHCs to be the "better" ligands to Fe(NO)2 and prompted investigations in (a) possible relationships between such imidazole- and NHC-containing DNICs, (b) systems that might mimic the reactivity of DNICs with the endogenous gaseotransmitter CO, and (c) mechanistic details of such processes. In a broader context, these studies aim to further describe the behavior of the {Fe(NO)2} unit as a single molecular entity when subjected to various ligand environments and reaction conditions.
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Affiliation(s)
- Randara Pulukkody
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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121
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Wang D, Viennois E, Ji K, Damera K, Draganov A, Zheng Y, Dai C, Merlin D, Wang B. A click-and-release approach to CO prodrugs. Chem Commun (Camb) 2015; 50:15890-3. [PMID: 25376496 DOI: 10.1039/c4cc07748b] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Carbon monoxide belongs to the family of signaling molecules and has been shown to possess therapeutic effects. Similar to NO, safe delivery of CO is a key issue in developing CO-based therapeutics. Herein we report a "click and release" CO-prodrug approach, which allows the release of CO under physiological conditions without the need for light irradiation. The system releases CO in a triggered and controllable manner and possesses the potential of tunable release rates.
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Affiliation(s)
- Danzhu Wang
- Department of Chemistry, Georgia State University, Atlanta, 30303-3083, Georgia.
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122
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Sayouri H, Boudier A, Vigneron C, Leroy P, Le Tacon S. [Hydrogen sulfide: A promising therapy in neuroprotection following cardiac arrest?]. ANNALES PHARMACEUTIQUES FRANÇAISES 2015; 73:401-10. [PMID: 26033567 DOI: 10.1016/j.pharma.2015.04.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/13/2015] [Accepted: 04/15/2015] [Indexed: 01/17/2023]
Abstract
Each year, in France, the number of cardiac arrests is evaluated between 30,000 to 50,000. When a patient survives, he undergoes a post-resuscitation syndrome which can aggravate the injuries and for which nowadays, no medication is available. In some kinds of cardiac arrest, a hypothermia protocol can be applied with a need for monitoring because of the appearance of side effects. In this context, hydrogen sulfide, which is a gasotransmitter with numerous physiological and pharmacological properties, may be interesting. Indeed, its use could protect against oxidative, inflammatory and apoptotic troubles induced by the post-resuscitation syndrome. The implied biochemical mechanisms are adenosine triphosphate potassium channels activation and cytochrome c oxidase inhibition. This molecule can also induce a suspended animation state characterized by a metabolism decrease, which could give a delay for physicians to start a therapeutic monitoring. Thus, in spite of a modest and sometimes contradictory literature, this compound could become the first neuroprotective molecule in cardiac arrest.
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Affiliation(s)
- H Sayouri
- EA 3452 CITHEFOR, faculté de pharmacie, université de Lorraine, 5, rue A.-Lebrun, BP 80403, 54001 Nancy cedex, France; Service de réanimation pédiatrique, hôpital d'enfants, centre hospitalo-universitaire de Nancy, rue du Morvan, 54511 Vandœuvre-lès-Nancy, France
| | - A Boudier
- EA 3452 CITHEFOR, faculté de pharmacie, université de Lorraine, 5, rue A.-Lebrun, BP 80403, 54001 Nancy cedex, France.
| | - C Vigneron
- EA 3452 CITHEFOR, faculté de pharmacie, université de Lorraine, 5, rue A.-Lebrun, BP 80403, 54001 Nancy cedex, France
| | - P Leroy
- EA 3452 CITHEFOR, faculté de pharmacie, université de Lorraine, 5, rue A.-Lebrun, BP 80403, 54001 Nancy cedex, France
| | - S Le Tacon
- Service de réanimation pédiatrique, hôpital d'enfants, centre hospitalo-universitaire de Nancy, rue du Morvan, 54511 Vandœuvre-lès-Nancy, France
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123
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Retamal MA, León-Paravic CG, Ezquer M, Ezquer F, Rio RD, Pupo A, Martínez AD, González C. Carbon monoxide: A new player in the redox regulation of connexin hemichannels. IUBMB Life 2015; 67:428-37. [DOI: 10.1002/iub.1388] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 05/05/2015] [Indexed: 01/23/2023]
Affiliation(s)
- Mauricio A. Retamal
- Centro de Fisiología Celular e Integrativa, Facultad de Medicina; Clínica Alemana Universidad del Desarrollo; Santiago Chile
| | - Carmen G. León-Paravic
- Centro de Fisiología Celular e Integrativa, Facultad de Medicina; Clínica Alemana Universidad del Desarrollo; Santiago Chile
| | - Marcelo Ezquer
- Centro de Medicina Regenerativa, Facultad de Medicina; Clínica Alemana Universidad del Desarrollo; Santiago Chile
| | - Fernando Ezquer
- Centro de Medicina Regenerativa, Facultad de Medicina; Clínica Alemana Universidad del Desarrollo; Santiago Chile
| | - Rodrigo Del Rio
- Centro de Investigación Biomédica; Universidad Autónoma de Chile; Santiago Chile
| | - Amaury Pupo
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias; Instituto de Neurociencia; Universidad de Valparaíso; Valparaíso Chile
| | - Agustín D. Martínez
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias; Instituto de Neurociencia; Universidad de Valparaíso; Valparaíso Chile
| | - Carlos González
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias; Instituto de Neurociencia; Universidad de Valparaíso; Valparaíso Chile
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124
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Magierowski M, Magierowska K, Kwiecien S, Brzozowski T. Gaseous mediators nitric oxide and hydrogen sulfide in the mechanism of gastrointestinal integrity, protection and ulcer healing. Molecules 2015; 20:9099-123. [PMID: 25996214 PMCID: PMC6272495 DOI: 10.3390/molecules20059099] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 04/29/2015] [Accepted: 05/13/2015] [Indexed: 12/16/2022] Open
Abstract
Nitric oxide (NO) and hydrogen sulfide (H2S) are known as biological messengers; they play an important role in human organism and contribute to many physiological and pathophysiological processes. NO is produced from l-arginine by constitutive NO synthase (NOS) and inducible NOS enzymatic pathways. This gaseous mediator inhibits platelet aggregation, leukocyte adhesion and contributes to the vessel homeostasis. NO is known as a vasodilatory molecule involved in control of the gastric blood flow (GBF) and the maintenance of gastric mucosal barrier integrity in either healthy gastric mucosa or that damaged by strong irritants. Biosynthesis of H2S in mammals depends upon two enzymes cystathionine-β-synthase and cystathionine γ-lyase. This gaseous mediator, similarly to NO and carbon monoxide, is involved in neuromodulation, vascular contractility and anti-inflammatory activities. For decades, H2S has been known to inhibit cytochrome c oxidase and reduce cell energy production. Nowadays it is generally considered to act through vascular smooth muscle ATP-dependent K+ channels, interacting with intracellular transcription factors and promote sulfhydration of protein cysteine moieties within the cell, but the mechanism of potential gastroprotective and ulcer healing properties of H2S has not been fully explained. The aim of this review is to compare current results of the studies concerning the role of H2S and NO in gastric mucosa protection and outline areas that may pose new opportunities for further development of novel therapeutic targets.
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Affiliation(s)
- Marcin Magierowski
- Department of Physiology, Jagiellonian University Medical College, Cracow 31-531, Poland.
| | - Katarzyna Magierowska
- Department of Physiology, Jagiellonian University Medical College, Cracow 31-531, Poland.
| | - Slawomir Kwiecien
- Department of Physiology, Jagiellonian University Medical College, Cracow 31-531, Poland.
| | - Tomasz Brzozowski
- Department of Physiology, Jagiellonian University Medical College, Cracow 31-531, Poland.
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125
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Nagel C, McLean S, Poole RK, Braunschweig H, Kramer T, Schatzschneider U. Introducing [Mn(CO)3(tpa-κ(3)N)](+) as a novel photoactivatable CO-releasing molecule with well-defined iCORM intermediates - synthesis, spectroscopy, and antibacterial activity. Dalton Trans 2015; 43:9986-97. [PMID: 24855638 DOI: 10.1039/c3dt51848e] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
[Mn(CO)3(tpa-κ(3)N)]Br was prepared as a novel photoactivatable CO-releasing molecule (PhotoCORM) from [MnBr(CO)5] and tris(2-pyridylmethyl)amine (tpa) for the delivery of carbon monoxide to biological systems, with the κ(3)N binding mode of the tetradentate tpa ligand demonstrated by X-ray crystallography. The title compound is a CORM prodrug stable in solution in the dark for up to 16 h. However, photoactivation at 365 nm leads to CO release from the metal coordination sphere and transfer to haem proteins, as demonstrated by the standard myoglobin assay. Different iCORM intermediates could be detected with solution IR spectroscopy and assigned using DFT vibrational calculations. The antibacterial activity of the complex was studied on Escherichia coli. No effects were observed when the cultures were either kept in the dark in the presence of PhotoCORM or illuminated in the absence of metal complex. However, photoactivation of [Mn(CO)3(tpa-κ(3)N)]Br at 365 nm led to the appearance of the spectral signatures of CO-coordinated haems in the terminal oxidases of the bacterial electron transport chain in whole-cell UV/Vis absorption spectra. Significant internalization of the PhotoCORM was demonstrated by ICP-MS measurement of the intracellular manganese concentration. In particular when using medium with succinate as the sole carbon source, a very pronounced and concentration-dependent decrease in the E. coli growth rate could be observed upon illumination in the presence of metal complex, which is attributed to the constrained energy metabolism under these conditions and a strong indicator of terminal oxidase inhibition by carbon monoxide delivered from the PhotoCORM.
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Affiliation(s)
- Christoph Nagel
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
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126
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Yuan G, Vasavda C, Peng YJ, Makarenko VV, Raghuraman G, Nanduri J, Gadalla MM, Semenza GL, Kumar GK, Snyder SH, Prabhakar NR. Protein kinase G-regulated production of H2S governs oxygen sensing. Sci Signal 2015; 8:ra37. [PMID: 25900831 DOI: 10.1126/scisignal.2005846] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reflexes initiated by the carotid body, the principal O2-sensing organ, are critical for maintaining cardiorespiratory homeostasis during hypoxia. O2 sensing by the carotid body requires carbon monoxide (CO) generation by heme oxygenase-2 (HO-2) and hydrogen sulfide (H2S) synthesis by cystathionine-γ-lyase (CSE). We report that O2 stimulated the generation of CO, but not that of H2S, and required two cysteine residues in the heme regulatory motif (Cys(265) and Cys(282)) of HO-2. CO stimulated protein kinase G (PKG)-dependent phosphorylation of Ser(377) of CSE, inhibiting the production of H2S. Hypoxia decreased the inhibition of CSE by reducing CO generation resulting in increased H2S, which stimulated carotid body neural activity. In carotid bodies from mice lacking HO-2, compensatory increased abundance of nNOS (neuronal nitric oxide synthase) mediated O2 sensing through PKG-dependent regulation of H2S by nitric oxide. These results provide a mechanism for how three gases work in concert in the carotid body to regulate breathing.
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Affiliation(s)
- Guoxiang Yuan
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Chirag Vasavda
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Ying-Jie Peng
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Vladislav V Makarenko
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Gayatri Raghuraman
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Jayasri Nanduri
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Moataz M Gadalla
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Gregg L Semenza
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Departments of Pediatrics, Medicine, Oncology, Radiation Oncology, and Biological Chemistry; and McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Ganesh K Kumar
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Solomon H Snyder
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Nanduri R Prabhakar
- Institute for Integrative Physiology and Center for Systems Biology for O2 Sensing, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA.
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127
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Koning AM, Frenay ARS, Leuvenink HG, van Goor H. Hydrogen sulfide in renal physiology, disease and transplantation – The smell of renal protection. Nitric Oxide 2015; 46:37-49. [DOI: 10.1016/j.niox.2015.01.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 01/19/2015] [Accepted: 01/22/2015] [Indexed: 01/08/2023]
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128
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Cortese-Krott MM, Fernandez BO, Kelm M, Butler AR, Feelisch M. On the chemical biology of the nitrite/sulfide interaction. Nitric Oxide 2015; 46:14-24. [DOI: 10.1016/j.niox.2014.12.009] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 11/27/2014] [Accepted: 12/15/2014] [Indexed: 02/07/2023]
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129
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Park SS, Hong M, Ha Y, Sim J, Jhon GJ, Lee Y, Suh M. The real-time in vivo electrochemical measurement of nitric oxide and carbon monoxide release upon direct epidural electrical stimulation of the rat neocortex. Analyst 2015; 140:3415-21. [PMID: 25751504 DOI: 10.1039/c5an00122f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This study reports real-time, in vivo functional measurement of nitric oxide (NO) and carbon monoxide (CO), two gaseous mediators in controlling cerebral blood flow. A dual electrochemical NO/CO microsensor enables us to probe the complex relationship between NO and CO in regulating cerebrovascular tone. Utilizing this dual sensor, we monitor in vivo change of NO and CO simultaneously during direct epidural electrical stimulation of a living rat brain cortex. Both NO and CO respond quickly to meet physiological needs. The neural system instantaneously increases the released amounts of NO and CO to compensate the abrupt, yet transient hypoxia that results from epidural electrical stimulation. Intrinsic-signal optical imaging confirms that direct electrical stimulation elicits robust, dynamic changes in cerebral blood flow, which must accompany NO and CO signaling. The addition of l-arginine (a substrate for NO synthase, NOS) results in increased NO generation and decreased CO production compared to control stimulation. On the other hand, application of the NOS inhibitor, l-N(G)-nitroarginine methyl ester (l-NAME), results in decreased NO release but increased CO production of greater magnitude. This observation suggests that the interaction between NO and CO release is likely not linear and yet, they are tightly linked vasodilators.
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Affiliation(s)
- Sarah S Park
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 120-750, Republic of Korea.
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130
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Hyperhomocysteinemia abrogates fasting-induced cardioprotection against ischemia/reperfusion by limiting bioavailability of hydrogen sulfide anions. J Mol Med (Berl) 2015; 93:879-89. [DOI: 10.1007/s00109-015-1271-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 02/19/2015] [Accepted: 02/24/2015] [Indexed: 11/27/2022]
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131
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Schatzschneider U. Novel lead structures and activation mechanisms for CO-releasing molecules (CORMs). Br J Pharmacol 2015; 172:1638-50. [PMID: 24628281 PMCID: PMC4369270 DOI: 10.1111/bph.12688] [Citation(s) in RCA: 194] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/28/2014] [Accepted: 03/06/2014] [Indexed: 12/11/2022] Open
Abstract
Carbon monoxide (CO) is an endogenous small signalling molecule in the human body, produced by the action of haem oxygenase on haem. Since it is very difficult to apply safely as a gas, solid storage and delivery forms for CO are now explored. Most of these CO-releasing molecules (CORMs) are based on the inactivation of the CO by coordinating it to a transition metal centre in a prodrug approach. After a brief look at the potential cellular target structures of CO, an overview of the design principles and activation mechanisms for CO release from a metal coordination sphere is given. Endogenous and exogenous triggers discussed include ligand exchange reactions with medium, enzymatically-induced CO release and photoactivated liberation of CO. Furthermore, the attachment of CORMs to hard and soft nanomaterials to confer additional target specificity to such systems is critically assessed. A survey of analytical methods for the study of the stoichiometry and kinetics of CO release, as well as the tracking of CO in living systems by using fluorescent probes, concludes this review. CORMs are very valuable tools for studying CO bioactivity and might lead to new drug candidates; however, in the design of future generations of CORMs, particular attention has to be paid to their drug-likeness and the tuning of the peripheral 'drug sphere' for specific biomedical applications. Further progress in this field will thus critically depend on a close interaction between synthetic chemists and researchers exploring the physiological effects and therapeutic applications of CO.
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Affiliation(s)
- U Schatzschneider
- Institut für Anorganische Chemie, Julius-Maximilians-Universität WürzburgWürzburg, Germany
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132
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Abstract
In saturation diving, divers stay under pressure until most of their tissues are saturated with breathing gas. Divers spend a long time in isolation exposed to increased partial pressure of oxygen, potentially toxic gases, bacteria, and bubble formation during decompression combined with shift work and long periods of relative inactivity. Hyperoxia may lead to the production of reactive oxygen species (ROS) that interact with cell structures, causing damage to proteins, lipids, and nucleic acid. Vascular gas-bubble formation and hyperoxia may lead to dysfunction of the endothelium. The antioxidant status of the diver is an important mechanism in the protection against injury and is influenced both by diet and genetic factors. The factors mentioned above may lead to production of heat shock proteins (HSP) that also may have a negative effect on endothelial function. On the other hand, there is a great deal of evidence that HSPs may also have a "conditioning" effect, thus protecting against injury. As people age, their ability to produce antioxidants decreases. We do not currently know the capacity for antioxidant defense, but it is reasonable to assume that it has a limit. Many studies have linked ROS to disease states such as cancer, insulin resistance, diabetes mellitus, cardiovascular diseases, and atherosclerosis as well as to old age. However, ROS are also involved in a number of protective mechanisms, for instance immune defense, antibacterial action, vascular tone, and signal transduction. Low-grade oxidative stress can increase antioxidant production. While under pressure, divers change depth frequently. After such changes and at the end of the dive, divers must follow procedures to decompress safely. Decompression sickness (DCS) used to be one of the major causes of injury in saturation diving. Improved decompression procedures have significantly reduced the number of reported incidents; however, data indicate considerable underreporting of injuries. Furthermore, divers who are required to return to the surface quickly are under higher risk of serious injury as no adequate decompression procedures for such situations are available. Decompression also leads to the production of endothelial microparticles that may reduce endothelial function. As good endothelial function is a documented indicator of health that can be influenced by regular exercise, regular physical exercise is recommended for saturation divers. Nowadays, saturation diving is a reasonably safe and well controlled method for working under water. Until now, no long-term impact on health due to diving has been documented. However, we still have limited knowledge about the pathophysiologic mechanisms involved. In particular we know little about the effect of long exposure to hyperoxia and microparticles on the endothelium.
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Affiliation(s)
- Alf O Brubakk
- Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
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133
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Wang L, Ma X, Che Y, Hou L, Liu X, Zhang W. Extracellular ATP mediates H 2 S-regulated stomatal movements and guard cell K + current in a H 2 O 2 -dependent manner in Arabidopsis. Sci Bull (Beijing) 2015. [DOI: 10.1007/s11434-014-0659-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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134
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Tift MS, Ponganis PJ, Crocker DE. Elevated carboxyhemoglobin in a marine mammal, the northern elephant seal. ACTA ACUST UNITED AC 2015; 217:1752-7. [PMID: 24829326 DOI: 10.1242/jeb.100677] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Low concentrations of endogenous carbon monoxide (CO), generated primarily through degradation of heme from heme-proteins, have been shown to maintain physiological function of organs and to exert cytoprotective effects. However, high concentrations of carboxyhemoglobin (COHb), formed by CO binding to hemoglobin, potentially prevent adequate O2 delivery to tissues by lowering arterial O2 content. Elevated heme-protein concentrations, as found in marine mammals, are likely associated with greater heme degradation, more endogenous CO production and, consequently, elevated COHb concentrations. Therefore, we measured COHb in elephant seals, a species with large blood volumes and elevated hemoglobin and myoglobin concentrations. The levels of COHb were positively related to the total hemoglobin concentration. The maximum COHb value was 10.4% of total hemoglobin concentration. The mean (± s.e.m.) value in adult seals was 8.7 ± 0.3% (N=6), while juveniles and pups (with lower heme-protein contents) had lower mean COHb values of 7.6 ± 0.2% and 7.1 ± 0.3%, respectively (N=9 and N=9, respectively). Serial samples over several hours revealed little to no fluctuation in COHb values. This consistent elevation in COHb suggests that the magnitude and/or rate of heme-protein turnover is much higher than in terrestrial mammals. The maximum COHb values from this study decrease total body O2 stores by 7%, thereby reducing the calculated aerobic dive limit for this species. However, the constant presence of elevated CO in blood may also protect against potential ischemia-reperfusion injury associated with the extreme breath-holds of elephant seals. We suggest the elephant seal represents an ideal model for understanding the potential cytoprotective effects, mechanisms of action and evolutionary adaptation associated with chronically elevated concentrations of endogenously produced CO.
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Affiliation(s)
- Michael S Tift
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0204, USA Department of Biology, Sonoma State University, Rohnert Park, CA 94928, USA
| | - Paul J Ponganis
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0204, USA
| | - Daniel E Crocker
- Department of Biology, Sonoma State University, Rohnert Park, CA 94928, USA
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135
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Ohta S. Molecular hydrogen as a novel antioxidant: overview of the advantages of hydrogen for medical applications. Methods Enzymol 2015; 555:289-317. [PMID: 25747486 DOI: 10.1016/bs.mie.2014.11.038] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Molecular hydrogen (H2) was believed to be inert and nonfunctional in mammalian cells. We overturned this concept by demonstrating that H2 reacts with highly reactive oxidants such as hydroxyl radical ((•)OH) and peroxynitrite (ONOO(-)) inside cells. H2 has several advantages exhibiting marked effects for medical applications: it is mild enough neither to disturb metabolic redox reactions nor to affect signaling by reactive oxygen species. Therefore, it should have no or little adverse effects. H2 can be monitored with an H2-specific electrode or by gas chromatography. H2 rapidly diffuses into tissues and cells to exhibit efficient effects. Thus, we proposed the potential of H2 for preventive and therapeutic applications. There are several methods to ingest or consume H2: inhaling H2 gas, drinking H2-dissolved water (H2-water), injecting H2-dissolved saline (H2-saline), taking an H2 bath, or dropping H2-saline onto the eyes. Recent publications revealed that, in addition to the direct neutralization of highly reactive oxidants, H2 indirectly reduces oxidative stress by regulating the expression of various genes. Moreover, by regulating gene expression, H2 functions as an anti-inflammatory, antiallergic, and antiapoptotic molecule, and stimulates energy metabolism. In addition to growing evidence obtained by model animal experiments, extensive clinical examinations were performed or are under way. Since most drugs specifically act on their specific targets, H2 seems to differ from conventional pharmaceutical drugs. Owing to its great efficacy and lack of adverse effects, H2 has potential for clinical applications for many diseases.
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Affiliation(s)
- Shigeo Ohta
- Department of Biochemistry and Cell Biology, Institute of Development and Aging Sciences, Graduate School of Medicine, Nippon Medical School, Kawasaki, Japan.
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136
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Yu S, Yan Z, Che N, Zhang X, Ge R. Impact of Carbon Monoxide/Heme Oxygenase on Hydrogen Sulfide/Cystathionine-γ-lyase Pathway in the Pathogenesis of Allergic Rhinitis in Guinea Pigs. Otolaryngol Head Neck Surg 2015; 152:470-6. [PMID: 25583855 DOI: 10.1177/0194599814567112] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Objective The discovery of carbon monoxide (CO) and hydrogen sulfide (H2S) as pathogenic signaling molecules in airway-related diseases has led to significant insights into the pathophysiologic mechanisms underlying the development of allergic rhinitis (AR). The potential crosstalk between CO and H2S signaling pathways in AR has not been adequately investigated. This study was performed to elucidate the mechanistic relationship between CO and H2S in AR. Study Design Experimental prospective animal study. Setting Animal laboratory of Tongji Hospital, Tongji University, Shanghai, China. Subjects and Methods A well-established model of AR was used whereby guinea pigs (N = 24) were randomly divided into 4 treatment groups (n = 6 for each group): The first group received ovalbumin only; the second group was administered exogenous hemin, a CO-binding metalloporphyrin; the third group received zinc protoporphyrin, an inhibitor of heme oxygenase-1. A control group was challenged using only saline. Symptoms of AR were recorded, and quantitation of plasma CO and H2S levels was performed. Expression of heme oxygenase-1 and H2S-generating enzyme cystathionine-γ-lyase (CSE) were measured from nasal mucosa. Results Plasma CO and heme oxygenase-1 expression levels of nasal mucosa were significantly increased in the AR group compared to controls, whereas H2S concentrations were significantly decreased. Exogenous administration of CO exacerbated allergic symptoms, resulting in higher levels of both CO and heme oxygenase-1 expression, and a further reduction in H2S levels and CSE expression. Zinc protoporphyrin decreased CO concentrations and increased levels of both H2S and CSE expression. Conclusions Results indicated an inverse relationship between H2S levels and CO in the pathogenesis of AR.
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Affiliation(s)
- Shaoqing Yu
- Department of Otolaryngology, Tongji Hospital, Tongji University, Shanghai, China
| | - Zhiqiang Yan
- Department of Otolaryngology, Xuzhou 97th Hospital of PLA, Jiangshu, China
| | - Na Che
- Department of Otolaryngology, Tongji Hospital, Tongji University, Shanghai, China
| | - Xiaolin Zhang
- Department of Otolaryngology, Tongji Hospital, Tongji University, Shanghai, China
| | - Rongming Ge
- Department of Otolaryngology, Tongji Hospital, Tongji University, Shanghai, China
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137
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Inaba H, Fujita K, Ueno T. Design of biomaterials for intracellular delivery of carbon monoxide. Biomater Sci 2015; 3:1423-38. [DOI: 10.1039/c5bm00210a] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this mini-review, current development of biomaterials as carbon monoxide-releasing molecules (CORMs) for intracellular applications is summarized and discussed.
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Affiliation(s)
- Hiroshi Inaba
- Department of Chemistry
- Roger Adams Laboratory
- University of Illinois
- Urbana
- USA
| | - Kenta Fujita
- Department of Biomolecular Engineering
- Graduate School of Bioscience and Biotechnology
- Tokyo Institute of Technology
- Yokohama 226-8501
- Japan
| | - Takafumi Ueno
- Department of Biomolecular Engineering
- Graduate School of Bioscience and Biotechnology
- Tokyo Institute of Technology
- Yokohama 226-8501
- Japan
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138
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León-Paravic CG, Figueroa VA, Guzmán DJ, Valderrama CF, Vallejos AA, Fiori MC, Altenberg GA, Reuss L, Retamal MA. Carbon monoxide (CO) is a novel inhibitor of connexin hemichannels. J Biol Chem 2014; 289:36150-7. [PMID: 25384983 PMCID: PMC4276878 DOI: 10.1074/jbc.m114.602243] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 11/07/2014] [Indexed: 12/13/2022] Open
Abstract
Hemichannels (HCs) are hexamers of connexins that can form gap-junction channels at points of cell contacts or "free HCs" at non-contacting regions. HCs are involved in paracrine and autocrine cell signaling, and under pathological conditions may induce and/or accelerate cell death. Therefore, studies of HC regulation are of great significance. Nitric oxide affects the activity of Cx43 and Cx46 HCs, whereas carbon monoxide (CO), another gaseous transmitter, modulates the activity of several ion channels, but its effect on HCs has not been explored. We studied the effect of CO donors (CORMs) on Cx46 HCs expressed in Xenopus laevis oocytes using two-electrode voltage clamp and on Cx43 and Cx46 expressed in HeLa cells using a dye-uptake technique. CORM-2 inhibited Cx46 HC currents in a concentration-dependent manner. The C-terminal domain and intracellular Cys were not necessary for the inhibition. The effect of CORM-2 was not prevented by guanylyl-cyclase, protein kinase G, or thioredoxin inhibitors, and was not due to endocytosis of HCs. However, the effect of CORM-2 was reversed by reducing agents that act extracellularly. Additionally, CO inhibited dye uptake of HeLa cells expressing Cx43 or Cx46, and MCF-7 cells, which endogenously express Cx43 and Cx46. Because CORM-2 carbonylates Cx46 in vitro and induces conformational changes, a direct effect of that CO on Cx46 is possible. The inhibition of HCs could help to understand some of the biological actions of CO in physiological and pathological conditions.
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Affiliation(s)
- Carmen G León-Paravic
- From the Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile 7690000 and
| | - Vania A Figueroa
- From the Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile 7690000 and
| | - Diego J Guzmán
- From the Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile 7690000 and
| | - Carlos F Valderrama
- From the Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile 7690000 and
| | - Antonio A Vallejos
- From the Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile 7690000 and
| | - Mariana C Fiori
- the Department of Cell Physiology and Molecular Biophysics, and Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas 79430
| | - Guillermo A Altenberg
- the Department of Cell Physiology and Molecular Biophysics, and Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas 79430
| | - Luis Reuss
- the Department of Cell Physiology and Molecular Biophysics, and Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas 79430
| | - Mauricio A Retamal
- From the Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile 7690000 and the Department of Cell Physiology and Molecular Biophysics, and Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas 79430
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139
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Scuffi D, Álvarez C, Laspina N, Gotor C, Lamattina L, García-Mata C. Hydrogen sulfide generated by L-cysteine desulfhydrase acts upstream of nitric oxide to modulate abscisic acid-dependent stomatal closure. PLANT PHYSIOLOGY 2014; 166:2065-76. [PMID: 25266633 PMCID: PMC4256879 DOI: 10.1104/pp.114.245373] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 09/23/2014] [Indexed: 05/20/2023]
Abstract
Abscisic acid (ABA) is a well-studied regulator of stomatal movement. Hydrogen sulfide (H2S), a small signaling gas molecule involved in key physiological processes in mammals, has been recently reported as a new component of the ABA signaling network in stomatal guard cells. In Arabidopsis (Arabidopsis thaliana), H2S is enzymatically produced in the cytosol through the activity of l-cysteine desulfhydrase (DES1). In this work, we used DES1 knockout Arabidopsis mutant plants (des1) to study the participation of DES1 in the cross talk between H2S and nitric oxide (NO) in the ABA-dependent signaling network in guard cells. The results show that ABA did not close the stomata in isolated epidermal strips of des1 mutants, an effect that was restored by the application of exogenous H2S. Quantitative reverse transcription polymerase chain reaction analysis demonstrated that ABA induces DES1 expression in guard cell-enriched RNA extracts from wild-type Arabidopsis plants. Furthermore, stomata from isolated epidermal strips of Arabidopsis ABA receptor mutant pyrabactin-resistant1 (pyr1)/pyrabactin-like1 (pyl1)/pyl2/pyl4 close in response to exogenous H2S, suggesting that this gasotransmitter is acting downstream, although acting independently of the ABA receptor cannot be ruled out with this data. However, the Arabidopsis clade-A PROTEIN PHOSPHATASE2C mutant abscisic acid-insensitive1 (abi1-1) does not close the stomata when epidermal strips were treated with H2S, suggesting that H2S required a functional ABI1. Further studies to unravel the cross talk between H2S and NO indicate that (1) H2S promotes NO production, (2) DES1 is required for ABA-dependent NO production, and (3) NO is downstream of H2S in ABA-induced stomatal closure. Altogether, data indicate that DES1 is a unique component of ABA signaling in guard cells.
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Affiliation(s)
- Denise Scuffi
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, 7600 Mar del Plata, Argentina (D.S., N.L., L.L., C.G.-M.); andInstituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, 41092 Seville, Spain (C.Á., C.G.)
| | - Consolación Álvarez
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, 7600 Mar del Plata, Argentina (D.S., N.L., L.L., C.G.-M.); andInstituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, 41092 Seville, Spain (C.Á., C.G.)
| | - Natalia Laspina
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, 7600 Mar del Plata, Argentina (D.S., N.L., L.L., C.G.-M.); andInstituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, 41092 Seville, Spain (C.Á., C.G.)
| | - Cecilia Gotor
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, 7600 Mar del Plata, Argentina (D.S., N.L., L.L., C.G.-M.); andInstituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, 41092 Seville, Spain (C.Á., C.G.)
| | - Lorenzo Lamattina
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, 7600 Mar del Plata, Argentina (D.S., N.L., L.L., C.G.-M.); andInstituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, 41092 Seville, Spain (C.Á., C.G.)
| | - Carlos García-Mata
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, 7600 Mar del Plata, Argentina (D.S., N.L., L.L., C.G.-M.); andInstituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, 41092 Seville, Spain (C.Á., C.G.)
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Ono K, Akaike T, Sawa T, Kumagai Y, Wink DA, Tantillo DJ, Hobbs AJ, Nagy P, Xian M, Lin J, Fukuto JM. Redox chemistry and chemical biology of H2S, hydropersulfides, and derived species: implications of their possible biological activity and utility. Free Radic Biol Med 2014; 77:82-94. [PMID: 25229186 PMCID: PMC4258476 DOI: 10.1016/j.freeradbiomed.2014.09.007] [Citation(s) in RCA: 291] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 09/02/2014] [Accepted: 09/04/2014] [Indexed: 12/17/2022]
Abstract
Hydrogen sulfide (H2S) is an endogenously generated and putative signaling/effector molecule. Despite its numerous reported functions, the chemistry by which it elicits its functions is not understood. Moreover, recent studies allude to the existence of other sulfur species besides H2S that may play critical physiological roles. Herein, the basic chemical biology of H2S as well as other related or derived species is discussed and reviewed. This review particularly focuses on the per- and polysulfides which are likely in equilibrium with free H2S and which may be important biological effectors themselves.
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Affiliation(s)
- Katsuhiko Ono
- Department of Chemistry, Sonoma State University, Rohnert Park, CA 94928, USA
| | - Takaaki Akaike
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Tomohiro Sawa
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Yoshito Kumagai
- Doctoral Program in Biomedical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - David A Wink
- Tumor Biology Section, Radiation Biology Branch, National Cancer Institute, Bethesda, MD 20892, USA
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA
| | - Adrian J Hobbs
- William Harvey Research Institute, Bart & London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Peter Nagy
- Department of Molecular Immunology and Toxicology, National Institute of Oncology, Budapest, Hungary
| | - Ming Xian
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA
| | - Joseph Lin
- Department of Biology, Sonoma State University, Rohnert Park, CA 94928, USA
| | - Jon M Fukuto
- Department of Chemistry, Sonoma State University, Rohnert Park, CA 94928, USA.
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141
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Sun Y, Huang Y, Zhang R, Chen Q, Chen J, Zong Y, Liu J, Feng S, Liu AD, Holmberg L, Liu D, Tang C, Du J, Jin H. Hydrogen sulfide upregulates KATP channel expression in vascular smooth muscle cells of spontaneously hypertensive rats. J Mol Med (Berl) 2014; 93:439-55. [PMID: 25412775 DOI: 10.1007/s00109-014-1227-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 10/26/2014] [Accepted: 11/03/2014] [Indexed: 01/23/2023]
Abstract
UNLABELLED The study was designed to investigate whether H2S could upregulate expression of KATP channels in vascular smooth muscle cells (VSMCs), and by this mechanism enhances vasorelaxation in spontaneously hypertensive rats (SHR). Blood pressure, vascular structure, and vasorelaxation were analyzed. Plasma H2S was detected using polarographic sensor. SUR2B and Kir6.1 expressions were detected in VSMCs of SHR and in A7r5 cells as well as primarily cultured ASMCs using real-time PCR, western blot, immunofluorescence, and confocal imaging. Nuclear translocation of forkhead transcription factors FOXO1 and FOXO3a in ASMCs was detected using laser confocal microscopy, and their binding activity with SUR2B and Kir6.1 promoters was examined by chromatin immunoprecipitation. SHR developed hypertension at 18 weeks. They showed downregulated vascular SUR2B and Kir6.1 expressions in association with a decreased plasma H2S level. H2S donor, however, could upregulate vascular SUR2B and Kir6.1 expressions, causing a left shift of the vasorelaxation curve to pinacidil and lowered tail artery pressure in the SHR. Also, H2S antagonized endothelin-1 (ET-1)-inhibited KATP expression in A7r5 cells and cultured ASMCs. Mechanistically, H2S inhibited ET-1-stimulated p-FOXO1 and p-FOXO3a expressions (inactivated forms), but increased their nuclear translocation and the ET-1-inhibited binding of FOXO1 and FOXO3a with Kir6.1 and SUR2B promoters in ASMCs. Hence, H2S promotes vasorelaxation of SHR, at least in part, through upregulating the expression of KATP subunits by inhibiting phosphorylation of FOXO1 and FOXO3a, and stimulating FOXO1 and FOXO3a nuclear translocation and their binding activity with SUR2B and Kir6.1 promoters. KEY MESSAGES H2S increased vascular SUR2B and Kir6.1 expression of SHR, promoting vasorelaxation. H2S antagonized ET-1-inhibited KATP expression in A7r5 cells and cultured ASMCs. H2S inhibited ET-1-induced FOXO1 and FOXO3a phosphorylation in ASMCs. H2S promoted FOXO1 and FOXO3a nuclear translocation and binding with target gene promoters.
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Affiliation(s)
- Yan Sun
- Department of Pediatrics, Peking University First Hospital, Xi-An Men Street No. 1, West District, Beijing, 100034, China
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142
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Hydrogen sulfide plays a key role in the inhibitory neurotransmission to the pig intravesical ureter. PLoS One 2014; 9:e113580. [PMID: 25415381 PMCID: PMC4240656 DOI: 10.1371/journal.pone.0113580] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/25/2014] [Indexed: 01/29/2023] Open
Abstract
According to previous observations nitric oxide (NO), as well as an unknown nature mediator are involved in the inhibitory neurotransmission to the intravesical ureter. This study investigates the hydrogen sulfide (H2S) role in the neurogenic relaxation of the pig intravesical ureter. We have performed western blot and immunohistochemistry to study the expression of the H2S synthesis enzymes cystathionine γ-lyase (CSE) and cystathionine β-synthase (CBS), measurement of enzymatic production of H2S and myographic studies for isometric force recording. Immunohistochemical assays showed a high CSE expression in the intravesical ureter muscular layer, as well as a strong CSE-immunoreactivity within nerve fibres distributed along smooth muscle bundles. CBS expression, however, was not consistently observed. On ureteral strips precontracted with thromboxane A2 analogue U46619, electrical field stimulation (EFS) and the H2S donor P-(4-methoxyphenyl)-P-4-morpholinylphosphinodithioic acid (GYY4137) evoked frequency- and concentration-dependent relaxations. CSE inhibition with DL-propargylglycine (PPG) reduced EFS-elicited responses and a combined blockade of both CSE and NO synthase (NOS) with, respectively, PPG and NG-nitro-L-arginine (L-NOARG), greatly reduced such relaxations. Endogenous H2S production rate was reduced by PPG, rescued by addition of GYY4137 and was not changed by L-NOARG. EFS and GYY4137 relaxations were also reduced by capsaicin-sensitive primary afferents (CSPA) desensitization with capsaicin and blockade of ATP-dependent K+ (KATP) channels, transient receptor potential A1 (TRPA1), transient receptor potential vanilloid 1 (TRPV1), vasoactive intestinal peptide/pituitary adenylyl cyclase-activating polypeptide (VIP/PACAP) and calcitonin gene-related peptide (CGRP) receptors with glibenclamide, HC030031, AMG9810, PACAP6–38 and CGRP8–37, respectively. These results suggest that H2S, synthesized by CSE, is involved in the inhibitory neurotransmission to the pig intravesical ureter, through an NO-independent pathway, producing smooth muscle relaxation via KATP channel activation. H2S also promotes the release of inhibitory neuropeptides, as PACAP 38 and/or CGRP from CSPA through TRPA1, TRPV1 and related ion channel activation.
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143
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Surducan M, Makarov SV, Silaghi-Dumitrescu R. O-S Bond Activation in Structures Isoelectronic with Ferric Peroxide Species Known in O-O-Activating Enzymes: Relevance for Sulfide Activation and Sulfite Reductases. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402657] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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144
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Sanokawa-Akakura R, Ostrakhovitch EA, Akakura S, Goodwin S, Tabibzadeh S. A H2S-Nampt dependent energetic circuit is critical to survival and cytoprotection from damage in cancer cells. PLoS One 2014; 9:e108537. [PMID: 25248148 PMCID: PMC4172766 DOI: 10.1371/journal.pone.0108537] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 08/27/2014] [Indexed: 11/18/2022] Open
Abstract
We recently demonstrated that cancer cells that recover from damage exhibit increased aerobic glycolysis, however, the molecular mechanism by which cancer cells survive the damage and show increased aerobic glycolysis remains unknown. Here, we demonstrate that diverse cancer cells that survive hypoxic or oxidative damage show rapid cell proliferation, and develop tolerance to damage associated with increased production of hydrogen sulfide (H2S) which drives up-regulation of nicotinamide phosphoribosyltransferase (Nampt). Consistent with existence of a H2S-Nampt energetic circuit, in damage recovered cancer cells, H2S, Nampt and ATP production exhibit a significant correlation. Moreover, the treatment of cancer cells with H2S donor, NaHS, coordinately increases Nampt and ATP levels, and protects cells from drug induced damage. Inhibition of cystathionine beta synthase (CBS) or cystathionase (CTH), enzymes which drive generation of H2S, decreases Nampt production while suppression of Nampt pathway by FK866, decreases H2S and ATP levels. Damage recovered cells isolated from tumors grown subcutaneously in athymic mice also show increased production of H2S, Nampt and ATP levels, associated with increased glycolysis and rapid proliferation. Together, these data show that upon recovery from potential lethal damage, H2S-Nampt directs energy expenditure and aerobic glycolysis in cancer cells, leads to their exponential growth, and causes a high degree of tolerance to damage. Identification of H2S-Nampt as a pathway responsible for induction of damage tolerance in cancer cells may underlie resistance to therapy and offers the opportunity to target this pathway as a means in treatment of cancer.
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Affiliation(s)
- Reiko Sanokawa-Akakura
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, California, United States of America
| | - Elena A. Ostrakhovitch
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, California, United States of America
| | - Shin Akakura
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, California, United States of America
| | - Scott Goodwin
- Dept of Radiological Sciences, University of California Irvine, Irvine, California, United States of America
| | - Siamak Tabibzadeh
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, California, United States of America
- Dept of Radiological Sciences, University of California Irvine, Irvine, California, United States of America
- * E-mail:
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145
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Misra H, Lickliter J, Kazo F, Abuchowski A. PEGylated Carboxyhemoglobin Bovine (SANGUINATE): Results of a Phase I Clinical Trial. Artif Organs 2014; 38:702-7. [DOI: 10.1111/aor.12341] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hemant Misra
- CSO; Prolong Pharmaceuticals LLC; South Plainfield NJ USA
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146
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Takano N, Sarfraz Y, Gilkes DM, Chaturvedi P, Xiang L, Suematsu M, Zagzag D, Semenza GL. Decreased expression of cystathionine β-synthase promotes glioma tumorigenesis. Mol Cancer Res 2014; 12:1398-406. [PMID: 24994751 DOI: 10.1158/1541-7786.mcr-14-0184] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
UNLABELLED Cystathionine β-synthase (CBS) catalyzes metabolic reactions that convert homocysteine to cystathionine. To assess the role of CBS in human glioma, cells were stably transfected with lentiviral vectors encoding shRNA targeting CBS or a nontargeting control shRNA, and subclones were injected into immunodeficient mice. Interestingly, decreased CBS expression did not affect proliferation in vitro but decreased the latency period before rapid tumor xenograft growth after subcutaneous injection and increased tumor incidence and volume following orthotopic implantation into the caudate-putamen. In soft-agar colony formation assays, CBS knockdown subclones displayed increased anchorage-independent growth. Molecular analysis revealed that CBS knockdown subclones expressed higher basal levels of the transcriptional activator hypoxia-inducible factor 2α (HIF2α/EPAS1). HIF2α knockdown counteracted the effect of CBS knockdown on anchorage-independent growth. Bioinformatic analysis of mRNA expression data from human glioma specimens revealed a significant association between low expression of CBS mRNA and high expression of angiopoietin-like 4 (ANGPTL4) and VEGF transcripts, which are HIF2 target gene products that were also increased in CBS knockdown subclones. These results suggest that decreased CBS expression in glioma increases HIF2α protein levels and HIF2 target gene expression, which promotes glioma tumor formation. IMPLICATIONS CBS loss-of-function promotes glioma growth.
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Affiliation(s)
- Naoharu Takano
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland. McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland. Department of Biochemistry, School of Medicine, Keio University, Tokyo, Japan
| | - Yasmeen Sarfraz
- Microvascular and Molecular Neuro-Oncology Laboratory, New York University School of Medicine, New York, New York
| | - Daniele M Gilkes
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland. McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Pallavi Chaturvedi
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland. McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lisha Xiang
- Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland. McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Makoto Suematsu
- Department of Biochemistry, School of Medicine, Keio University, Tokyo, Japan
| | - David Zagzag
- Microvascular and Molecular Neuro-Oncology Laboratory, New York University School of Medicine, New York, New York. Division of Neuropathology, Department of Pathology and Neurosurgery, New York University School of Medicine, New York, New York
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Shabala S, Pottosin I. Regulation of potassium transport in plants under hostile conditions: implications for abiotic and biotic stress tolerance. PHYSIOLOGIA PLANTARUM 2014; 151:257-79. [PMID: 24506225 DOI: 10.1111/ppl.12165] [Citation(s) in RCA: 274] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 12/15/2013] [Accepted: 01/13/2014] [Indexed: 05/18/2023]
Abstract
Intracellular potassium homeostasis is a prerequisite for the optimal operation of plant metabolic machinery and plant's overall performance. It is controlled by K(+) uptake, efflux and intracellular and long-distance relocation, mediated by a large number of K(+) -selective and non-selective channels and transporters located at both plasma and vacuolar membranes. All abiotic and biotic stresses result in a significant disturbance to intracellular potassium homeostasis. In this work, we discuss molecular mechanisms and messengers mediating potassium transport and homeostasis focusing on four major environmental stresses: salinity, drought, flooding and biotic factors. We argue that cytosolic K(+) content may be considered as one of the 'master switches' enabling plant transition from the normal metabolism to 'hibernated state' during first hours after the stress exposure and then to a recovery phase. We show that all these stresses trigger substantial disturbance to K(+) homeostasis and provoke a feedback control on K(+) channels and transporters expression and post-translational regulation of their activity, optimizing K(+) absorption and usage, and, at the extreme end, assisting the programmed cell death. We discuss specific modes of regulation of the activity of K(+) channels and transporters by membrane voltage, intracellular Ca(2+) , reactive oxygen species, polyamines, phytohormones and gasotransmitters, and link this regulation with plant-adaptive responses to hostile environments.
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Affiliation(s)
- Sergey Shabala
- School of Agricultural Science, University of Tasmania, Hobart, Tas, 7001, Australia
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148
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Haouzi P, Sonobe T, Chenuel B. Oxygen-related chemoreceptor drive to breathe during H₂S infusion. Respir Physiol Neurobiol 2014; 201:24-30. [PMID: 24973475 DOI: 10.1016/j.resp.2014.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 05/29/2014] [Accepted: 05/30/2014] [Indexed: 12/31/2022]
Abstract
This study addresses the following question: Could the acute depression in breathing produced by hyperoxia, a reflection of the tonic drive to breathe from the arterial chemoreceptors, be accounted for by a background level of endogenous H2S? To address this question, we produced a stable but moderate increase in breathing (24±11%) via continuous infusion of low levels of H2S, in 10 spontaneously breathing urethane-sedated rats. We found that acute exposure to 100% O2 (20 tests) decreased minute ventilation (V˙(I)) from 301±51 to 210±43 ml/min within 15s in control conditions, but no additional significant drop in V˙(I) was observed during H2S induced hyperpnea. In addition, no decrease in the estimated concentrations of gaseous H2S in the arterial blood was observed during the hyperoxic tests. It is concluded that the ventilatory depression induced by high O2 appears to be limited to the tonic background peripheral chemosensory drive to breathe, but has little or no impact on the CB stimulation produced by low levels of H2S.
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Affiliation(s)
- Philippe Haouzi
- Pennsylvania State University, College of Medicine Department of Medicine, Division of Pulmonary and Critical Care Medicine, Hershey, PA, USA.
| | - Takashi Sonobe
- Pennsylvania State University, College of Medicine Department of Medicine, Division of Pulmonary and Critical Care Medicine, Hershey, PA, USA
| | - Bruno Chenuel
- Pennsylvania State University, College of Medicine Department of Medicine, Division of Pulmonary and Critical Care Medicine, Hershey, PA, USA
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149
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Hydrogen sulfide increases nitric oxide production and subsequent S-nitrosylation in endothelial cells. ScientificWorldJournal 2014; 2014:480387. [PMID: 24971375 PMCID: PMC4055124 DOI: 10.1155/2014/480387] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 05/05/2014] [Indexed: 12/15/2022] Open
Abstract
Hydrogen sulfide (H2S) and nitric oxide (NO), two endogenous gaseous molecules in endothelial cells, got increased attention with respect to their protective roles in the cardiovascular system. However, the details of the signaling pathways between H2S and NO in endothelia cells remain unclear. In this study, a treatment with NaHS profoundly increased the expression and the activity of endothelial nitric oxide synthase. Elevated gaseous NO levels were observed by a novel and specific fluorescent probe, 5-amino-2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)benzoic acid methyl ester (FA-OMe), and quantified by flow cytometry. Further study indicated an increase of upstream regulator for eNOS activation, AMP-activated protein kinase (AMPK), and protein kinase B (Akt). By using a biotin switch, the level of NO-mediated protein S-nitrosylation was also enhanced. However, with the addition of the NO donor, NOC-18, the expressions of cystathionine-γ-lyase, cystathionine-β-synthase, and 3-mercaptopyruvate sulfurtransferase were not changed. The level of H2S was also monitored by a new designed fluorescent probe, 4-nitro-7-thiocyanatobenz-2-oxa-1,3-diazole (NBD-SCN) with high specificity. Therefore, NO did not reciprocally increase the expression of H2S-generating enzymes and the H2S level. The present study provides an integrated insight of cellular responses to H2S and NO from protein expression to gaseous molecule generation, which indicates the upstream role of H2S in modulating NO production and protein S-nitrosylation.
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150
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Zheng K, Lin W, Tan L, Chen H, Cui H. A unique carbazole–coumarin fused two-photon platform: development of a robust two-photon fluorescent probe for imaging carbon monoxide in living tissues. Chem Sci 2014. [DOI: 10.1039/c4sc00283k] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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