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Chu JCH, Wong CTT, Ng DKP. Toward Precise Antitumoral Photodynamic Therapy Using a Dual Receptor-Mediated Bioorthogonal Activation Approach. Angew Chem Int Ed Engl 2023; 62:e202214473. [PMID: 36376249 DOI: 10.1002/anie.202214473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Indexed: 11/16/2022]
Abstract
Targeted delivery and specific activation of photosensitizers can greatly improve the treatment outcome of photodynamic therapy. To this end, we report herein a novel dual receptor-mediated bioorthogonal activation approach to enhance the tumor specificity of the photodynamic action. It involves the targeted delivery of a biotinylated boron dipyrromethene (BODIPY)-based photosensitizer, which is quenched in the native form by the attached 1,2,4,5-tetrazine unit, and an epidermal growth factor receptor (EGFR)-targeting cyclic peptide conjugated with a bicycle[6.1.0]non-4-yne moiety. Only for cancer cells that overexpress both the biotin receptor and EGFR, the two components can be internalized preferentially where they undergo an inverse electron-demand Diels-Alder reaction, leading to restoration of the photodynamic activity of the BODIPY core. By using a range of cell lines with different expression levels of these two receptors, we have demonstrated that this stepwise "deliver-and-click" approach can confine the photodynamic action on a specific type of cancer cells.
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Affiliation(s)
- Jacky C H Chu
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Clarence T T Wong
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.,Current address: Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Dennis K P Ng
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
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Xiao M, Zhang YK, Li R, Li S, Wang D, An P. Photoactivatable Fluorogenic Azide-Alkyne Click Reaction: A Dual-Activation Fluorescent Probe. Chem Asian J 2022; 17:e202200634. [PMID: 35819362 DOI: 10.1002/asia.202200634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/01/2022] [Indexed: 11/12/2022]
Abstract
Aryl azide and diaryl tetrazole are both photoactive molecules, which can form nitrene and nitrile imine intermediates respectively by photolysis. Depending on the new finding that the azide can suppress the photolysis of tetrazole in the azide-tetrazole conjugated system, we developed aryl azide-tetrazole probes for the photoactivatable fluorogenic azide alkyne click (PFAAC) reaction, in which the aryl azide-tetrazole probes were not phoroactivatable fluorogenic itself, but the triazole products after click reaction were prefluorophore that can be activated by light. Therefore, in PFAAC chemistry, the fluorescent probes can be activated by two orthogonal events: azide-alkyne click reaction and light, which leads to spatiotemporal resolution and high signal-to-noise ratio. This PFAAC process was proved in vitro by copper catalyzed or strain-promoted azide-alkyne reactions and in live cells by spatiotemporally controlled organelle imaging. By incorporation a linker to the azide-tetrazole conjugate, this PFAAC chemistry could covalently label extra probes to the biomolecules and spatiotemporally detecting this process by photoinduced fluorescence.
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Affiliation(s)
| | | | | | | | - Di Wang
- Yunnan University, chemistry, CHINA
| | - Peng An
- Yunnan University, school of chemical science and technology, South Outer Ring Road, 650500, Kunming, CHINA
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Albitz E, Kern D, Kormos A, Bojtár M, Török G, Biró A, Szatmári Á, Németh K, Kele P. Bioorthogonal Ligation-Activated Fluorogenic FRET Dyads. Angew Chem Int Ed Engl 2021; 61:e202111855. [PMID: 34861094 PMCID: PMC9305863 DOI: 10.1002/anie.202111855] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Indexed: 12/04/2022]
Abstract
An energy transfer‐based signal amplification relay concept enabling transmission of bioorthogonally activatable fluorogenicity of blue‐excitable coumarins to yellow/red emitting cyanine frames is presented. Such relay mechanism resulted in improved cyanine fluorogenicities together with increased photostabilities and large apparent Stokes‐shifts allowing lower background fluorescence even in no‐wash bioorthogonal fluorogenic labeling schemes of intracellular structures in live cells. These energy transfer dyads sharing the same donor moiety together with their parent donor molecule allowed three‐color imaging of intracellular targets using one single excitation source with separate emission windows. Sub‐diffraction imaging of intracellular structures using the bioorthogonally activatable FRET dyads by STED microscopy is also presented.
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Affiliation(s)
- Evelin Albitz
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/a, 1117, Budapest, Hungary
| | - Dóra Kern
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/a, 1117, Budapest, Hungary
| | - Attila Kormos
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Márton Bojtár
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - György Török
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary.,Department of Biophysics and Radiation Biology, Semmelweis University, Tűzoltó u. 37-47, 1094, Budapest, Hungary
| | - Adrienn Biró
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Ágnes Szatmári
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Krisztina Németh
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
| | - Péter Kele
- Chemical Biology Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar tudósok krt. 2, 1117, Budapest, Hungary
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