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Zhang K, Li H, Wu X, Zhang D, Li Z. Positron Emission Tomography of Nitric Oxide by a Specific Radical-Generating Dihydropyridine Tracer. ACS Sens 2024. [PMID: 38820066 DOI: 10.1021/acssensors.4c00453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
Nitric oxide (NO) plays a pivotal role as a biological signaling molecule, presenting challenges in its specific detection and differentiation from other reactive nitrogen and oxygen species within living organisms. Herein, a 18F-labeled (fluorine-18, t1/2 = 109.7 min) small-molecule tracer dimethyl 4-(4-(4-[18F]fluorobutoxy)benzyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate ([18F]BDHP) is developed based on the dihydropyridine scaffold for positron emission tomography (PET) imaging of NO in vivo. [18F]BDHP exhibits a highly sensitive and efficient C-C cleavage reaction specifically triggered by NO under physiological conditions, leading to the production of a 18F-labeled radical that is readily retained within the cells. High uptakes of [18F]BDHP are found within and around NO-generating cells, such as macrophages treated with lipopolysaccharide or benzo(a)pyrene. MicroPET/CT imaging of arthritic animal model mice reveals distinct tracer accumulation in the arthritic legs, showcasing a higher distribution of NO compared with the control legs. In summary, a specific radical-generating dihydropyridine tracer with a unique radical retention strategy has been established for the marking of NO in real-time in vivo.
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Affiliation(s)
- Kaiqiang Zhang
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
| | - Hua Li
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
| | - Xiaowei Wu
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
| | - Deliang Zhang
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
- Department of Nuclear Medicine, Xiang'an Hospital affiliated to Xiamen University, Xiamen, Fujian 361005, China
| | - Zijing Li
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
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Pongratz G, Straub RH. Chronic Effects of the Sympathetic Nervous System in Inflammatory Models. Neuroimmunomodulation 2023; 30:113-134. [PMID: 37231902 DOI: 10.1159/000530969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023] Open
Abstract
The immune system is embedded in a network of regulatory systems to keep homeostasis in case of an immunologic challenge. Neuroendocrine immunologic research has revealed several aspects of these interactions over the past decades, e.g., between the autonomic nervous system and the immune system. This review will focus on evidence revealing the role of the sympathetic nervous system (SNS) in chronic inflammation, like colitis, multiple sclerosis, systemic sclerosis, lupus erythematodes, and arthritis with a focus on animal models supported by human data. A theory of the contribution of the SNS in chronic inflammation will be presented that spans these disease entities. One major finding is the biphasic nature of the sympathetic contribution to inflammation, with proinflammatory effects until the point of disease outbreak and mainly anti-inflammatory influence thereafter. Since sympathetic nerve fibers are lost from sites of inflammation during inflammation, local cells and immune cells achieve the capability to endogenously produce catecholamines to fine-tune the inflammatory response independent of brain control. On a systemic level, it has been shown across models that the SNS is activated in inflammation as opposed to the parasympathetic nervous system. Permanent overactivity of the SNS contributes to many of the known disease sequelae. One goal of neuroendocrine immune research is defining new therapeutic targets. In this respect, it will be discussed that at least in arthritis, it might be beneficial to support β-adrenergic and inhibit α-adrenergic activity besides restoring autonomic balance. Overall, in the clinical setting, we now need controlled interventional studies to successfully translate the theoretical knowledge into benefits for patients.
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Affiliation(s)
- Georg Pongratz
- Department of Gastroenterology, Division of Rheumatology and Clinical Immunology, St. John of God Hospital, Regensburg, Germany
- Medical Faculty of the University of Regensburg, Regensburg, Germany
| | - Rainer H Straub
- Laboratory of Experimental Rheumatology and Neuroendocrino-Immunology, Department of Internal Medicine I, University Hospital Regensburg, Regensburg, Germany
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Chen Y. Recent developments of fluorescent probes for detection and bioimaging of nitric oxide. Nitric Oxide 2020; 98:1-19. [DOI: 10.1016/j.niox.2020.02.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/13/2020] [Accepted: 02/17/2020] [Indexed: 12/11/2022]
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Wu W, Guan R, Liao X, Yan X, Rees TW, Ji L, Chao H. Bimodal Visualization of Endogenous Nitric Oxide in Lysosomes with a Two-Photon Iridium(III) Phosphorescent Probe. Anal Chem 2019; 91:10266-10272. [PMID: 31291720 DOI: 10.1021/acs.analchem.9b02415] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nitric oxide (NO) is a fundamental signaling molecule that shows complex effects on the catabolic autophagy process, which is closely linked with lysosomal function. In this study, a new lysosome-targeted, pH-independent, and two-photon phosphorescent iridium(III) complex, Ir-BPDA, has been investigated for endogenous NO detection and imaging. The rational design of the probe, as the addition of the morpholine moieties and the substitution of a benzyl group in the amino group in Ir-BPDA, facilitates its accumulation in lysosomes and makes the reaction product with NO, Ir-BPDA-NO, insusceptible in its phosphorescence intensity and lifetime against pH changes (pH 4-10), well suited for lysosomal NO detection (pH 4-6). Furthermore, Ir-BPDA exhibits a fast and 50-fold response to NO in phosphorescence intensity and a two-photon cross-section as high as 60 GM after the reaction, as well as a notably increased phosphorescence lifetime from 200.1 to 619.6 ns. Thus, accompanied by its photostability, Ir-BPDA enabled the detection of NO in the lipopolysaccharide-stimulated macrophages and zebrafish model, revealing the endogenous lysosomal NO distribution during inflammation in vivo by means of both TPM and PLIM imaging techniques.
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Affiliation(s)
- Weijun Wu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Ruilin Guan
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Xinxing Liao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Xu Yan
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Thomas W Rees
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Liangnian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China
| | - Hui Chao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China.,MOE Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , 400201 , P. R. China
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Bucsek MJ, Giridharan T, MacDonald CR, Hylander BL, Repasky EA. An overview of the role of sympathetic regulation of immune responses in infectious disease and autoimmunity. Int J Hyperthermia 2019; 34:135-143. [PMID: 29498310 DOI: 10.1080/02656736.2017.1411621] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Stress in patients and pre-clinical research animals plays a critical role in disease progression Activation of the sympathetic nervous system (SNS) by stress results in secretion of the catecholamines epinephrine (Epi) and norepinephrine (NE) from the adrenal gland and sympathetic nerve endings. Adrenergic receptors for catecholamines are present on immune cells and their activity is affected by stress and the accompanying changes in levels of these neurotransmitters. In this short review, we discuss how this adrenergic stress impacts two categories of immune responses, infections and autoimmune diseases. Catecholamines signal primarily through the β2-adrenergic receptors present on innate and adaptive immune cells which are critical in responding to infections caused by pathogens. In general, this adrenergic input, particularly chronic stimulation, suppresses lymphocytes and allows infections to progress. On the other hand, insufficient adrenergic control of immune responses allows progression of several autoimmune diseases.
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Affiliation(s)
- Mark J Bucsek
- a Department of Immunology , Roswell Park Cancer Institute , Buffalo , NY , USA
| | | | - Cameron R MacDonald
- a Department of Immunology , Roswell Park Cancer Institute , Buffalo , NY , USA
| | - Bonnie L Hylander
- a Department of Immunology , Roswell Park Cancer Institute , Buffalo , NY , USA
| | - Elizabeth A Repasky
- a Department of Immunology , Roswell Park Cancer Institute , Buffalo , NY , USA
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Li H, Zhang D, Gao M, Huang L, Tang L, Li Z, Chen X, Zhang X. Highly specific C-C bond cleavage induced FRET fluorescence for in vivo biological nitric oxide imaging. Chem Sci 2017; 8:2199-2203. [PMID: 28507674 PMCID: PMC5407267 DOI: 10.1039/c6sc04071c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Accepted: 11/30/2016] [Indexed: 12/12/2022] Open
Abstract
A novel Förster resonance energy transfer (FRET) fluorescence "off-on" system based on the highly specific, sensitive and effective C-C bond cleavage of certain dihydropyridine derivatives was reported for real-time quantitative imaging of nitric oxide (NO). 1,4-Dihydropyridine was synthesized as a novel linker which could connect customized fluorophores and their corresponding quenchers. The specific and quantitative response to NO is confirmed using fluorescence spectrometry with the classical example of fluorescein isothiocyanate (FITC) and [4'-(N,N'-dimethylamino)phenylazo] benzoyl (DABCYL). The fluorescence intensity increased linearly with the increase in the amount of NO. Cells incubated with an exogenous NO donor emitted fluorescence as expected. A high fluorescence intensity was detected in macrophages which generate NO when incubated with lipopolysaccharide (LPS). The in vivo imaging shows about an 8-fold contrast between Freund's adjuvant stimulated feet and normal feet in mice after intravenous injection, which was the first example of in vivo semiquantitative fluorescence imaging of NO in mammals.
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Affiliation(s)
- Hua Li
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
| | - Deliang Zhang
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
| | - Mengna Gao
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
| | - Lumei Huang
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
| | - Longguang Tang
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
| | - Zijing Li
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN) , National Institute of Biomedical Imaging and Bioengineering (NIBIB) , National Institutes of Health (USA) , Bethesda , Maryland 20892 , USA
| | - Xianzhong Zhang
- Center for Molecular Imaging and Translational Medicine , State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics , School of Public Health , Xiamen University , 361102 Xiamen , Fujian , China . ;
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