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An K, Fan J, Lin B, Han Y. A lysosome-targeted fluorescent probe for fluorescence imaging of hypochlorous acid in living cells and in vivo. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 316:124316. [PMID: 38669982 DOI: 10.1016/j.saa.2024.124316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/15/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024]
Abstract
Lysosomes, as crucial acidic organelles in cells, play a significant role in cellular functions. The levels and distribution of hypochlorous acid (HOCl) within lysosomes can profoundly impact their biological functionality. Hence, real-time monitoring of the concentration of HOCl in lysosomes holds paramount importance for further understanding various physiological and pathological processes associated with lysosomes. In this study, we developed a bodipy-based fluorescent probe derived from pyridine and phenyl selenide for the specific detection of HOCl in aqueous solutions. Leveraging the probe's sensitive photoinduced electron transfer effect from phenyl selenide to the fluorophore, the probe exhibited satisfactory high sensitivity (with a limit of detection of 5.2 nM and a response time of 15 s) to hypochlorous acid. Further biological experiments confirmed that the introduction of the pyridine moiety enabled the probe molecule to selectively target lysosomes. Moreover, the probe successfully facilitated real-time monitoring of HOCl in cell models stimulated by N-acetylcysteine (NAC) and lipopolysaccharide (LPS), as well as in a normal zebrafish model. This provides a universal method for dynamically sensing HOCl in lysosomes.
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Affiliation(s)
- Ke An
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiaxin Fan
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Bin Lin
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yifeng Han
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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Szepesi Kovács D, Chiovini B, Müller D, Tóth EZ, Fülöp A, Ábrányi-Balogh P, Wittner L, Várady G, Farkas Ö, Turczel G, Katona G, Győrffy B, Keserű GM, Mucsi Z, Rózsa BJ, Kovács E. Synthesis and Application of Two-Photon Active Fluorescent Rhodol Dyes for Antibody Conjugation and In Vitro Cell Imaging. ACS OMEGA 2023; 8:22836-22843. [PMID: 37396252 PMCID: PMC10308389 DOI: 10.1021/acsomega.3c01796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 06/01/2023] [Indexed: 07/04/2023]
Abstract
A novel family of julolidine-containing fluorescent rhodols equipped with a wide variety of substituents was synthesized in a versatile two-step process. The prepared compounds were fully characterized and exhibited excellent fluorescence properties for microscopy imaging. The best candidate was conjugated to the therapeutic antibody trastuzumab through a copper-free strain-promoted azide-alkyne click reaction. The rhodol-labeled antibody was successfully applied for in vitro confocal and two-photon microscopy imaging of Her2+ cells.
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Affiliation(s)
- Dénes Szepesi Kovács
- Medicinal
Chemistry Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics, H-1111 Budapest, Hungary
- National
Laboratory for Drug Research and Development, H-1117 Budapest, Hungary
| | - Balázs Chiovini
- Faculty
of Information Technology and Bionics, Pázmány
Péter Catholic University, H-1444 Budapest, Hungary
| | - Dalma Müller
- Oncology
Biomarker Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
- Department
of Bioinformatics, Semmelweis University, H-1094 Budapest, Hungary
- Semmelweis
University Doctoral School, H-1085 Budapest Hungary
| | - Estilla Zsófia Tóth
- National
Laboratory for Drug Research and Development, H-1117 Budapest, Hungary
- Semmelweis
University Doctoral School, H-1085 Budapest Hungary
- Integrative
Neuroscience Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
| | - Anna Fülöp
- Femtonics
Ltd., H-1094 Budapest, Hungary
| | - Péter Ábrányi-Balogh
- Medicinal
Chemistry Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics, H-1111 Budapest, Hungary
- National
Laboratory for Drug Research and Development, H-1117 Budapest, Hungary
| | - Lucia Wittner
- National
Laboratory for Drug Research and Development, H-1117 Budapest, Hungary
- Integrative
Neuroscience Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
| | - György Várady
- Molecular
Cell Biology Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
| | - Ödön Farkas
- Department
of Organic Chemistry, Eötvös
Loránd University, H-1117 Budapest, Hungary
| | - Gábor Turczel
- NMR
Research Laboratory, Research Centre for
Natural Sciences, H-1117 Budapest, Hungary
| | - Gergely Katona
- Faculty
of Information Technology and Bionics, Pázmány
Péter Catholic University, H-1444 Budapest, Hungary
| | - Balázs Győrffy
- National
Laboratory for Drug Research and Development, H-1117 Budapest, Hungary
- Oncology
Biomarker Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
- Department
of Bioinformatics, Semmelweis University, H-1094 Budapest, Hungary
- Department
of Pediatrics, Semmelweis University, H-1094 Budapest, Hungary
| | - György Miklós Keserű
- Medicinal
Chemistry Research Group, Research Centre
for Natural Sciences, H-1117 Budapest, Hungary
- Department
of Organic Chemistry and Technology, Budapest
University of Technology and Economics, H-1111 Budapest, Hungary
- National
Laboratory for Drug Research and Development, H-1117 Budapest, Hungary
| | - Zoltán Mucsi
- Brain Vision Center, H-1094 Budapest, Hungary
- Faculty
of Materials and Chemical Sciences, University
of Miskolc, Miskolc H-3515, Hungary
| | - Balázs J. Rózsa
- Faculty
of Information Technology and Bionics, Pázmány
Péter Catholic University, H-1444 Budapest, Hungary
- Brain Vision Center, H-1094 Budapest, Hungary
- Laboratory of 3D Functional Network and Dendritic Imaging, Institute of Experimental Medicine, H-1083 Budapest, Hungary
| | - Ervin Kovács
- Femtonics
Ltd., H-1094 Budapest, Hungary
- Polymer
Chemistry and Physics Research Group, Research
Centre for Natural Sciences, H-1117 Budapest, Hungary
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Chen S, Chen H, Du Q, Shen J. Targeting Myeloperoxidase (MPO) Mediated Oxidative Stress and Inflammation for Reducing Brain Ischemia Injury: Potential Application of Natural Compounds. Front Physiol 2020; 11:433. [PMID: 32508671 PMCID: PMC7248223 DOI: 10.3389/fphys.2020.00433] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/08/2020] [Indexed: 12/20/2022] Open
Abstract
Oxidative stress and inflammation are two critical pathological processes of cerebral ischemia-reperfusion injury. Myeloperoxidase (MPO) is a critical inflammatory enzyme and therapeutic target triggering both oxidative stress and neuroinflammation in the pathological process of cerebral ischemia-reperfusion injury. MPO is presented in infiltrated neutrophils, activated microglial cells, neurons, and astrocytes in the ischemic brain. Activation of MPO can catalyze the reaction of chloride and H2O2 to produce HOCl. MPO also mediates oxidative stress by promoting the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS), modulating the polarization and inflammation-related signaling pathways in microglia and neutrophils. MPO can be a therapeutic target for attenuating oxidative damage and neuroinflammation in ischemic stroke. Targeting MPO with inhibitors or gene deficiency significantly reduced brain infarction and improved neurological outcomes. This article discusses the important roles of MPO in mediating oxidative stress and neuroinflammation during cerebral ischemia-reperfusion injury and reviews the current understanding of the underlying mechanisms. Furthermore, we summarize the active compounds from medicinal herbs with potential as MPO inhibitors for anti-oxidative stress and anti-inflammation to attenuate cerebral ischemia-reperfusion injury, and as adjunct therapeutic agents for extending the window of thrombolytic treatment. We highlight that targeting MPO could be a promising strategy for alleviating ischemic brain injury, which merits further translational study.
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Affiliation(s)
- Shuang Chen
- School of Chinese Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Hansen Chen
- School of Chinese Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
- Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, China
| | - Qiaohui Du
- School of Chinese Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | - Jiangang Shen
- School of Chinese Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong
- Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, China
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