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Yan Z, Pan Y, Jiao G, Xu M, Fan D, Hu Z, Wu J, Chen T, Liu M, Bao X, Ke H, Ji X. A Bioorthogonal Decaging Chemistry of N-Oxide and Silylborane for Prodrug Activation both In Vitro and In Vivo. J Am Chem Soc 2023; 145:24698-24706. [PMID: 37933858 DOI: 10.1021/jacs.3c08012] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Bioorthogonal decaging chemistry with both fast kinetics and high efficiency is highly demanded for in vivo applications but remains very sporadic. Herein, we describe a new bioorthogonal decaging chemistry between N-oxide and silylborane. A simple replacement of "C" in boronic acid with "Si" was able to substantially accelerate the N-oxide decaging kinetics by 106 fold (k2: up to 103 M-1 s-1). Moreover, a new N-oxide-masked self-immolative spacer was developed for the traceless release of various payloads upon clicking with silylborane with fast kinetics and high efficiency (>90%). Impressively, one such N-oxide-based self-assembled bioorthogonal nano-prodrug in combination with silylborane led to significantly enhanced tumor suppression effects as compared to the parent drug in a 4T1 mouse breast tumor model. In aggregate, this new bioorthogonal click-and-release chemistry is featured with fast kinetics and high efficiency and is perceived to find widespread applications in chemical biology and drug delivery.
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Affiliation(s)
- Zhicheng Yan
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Yiyao Pan
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Guofeng Jiao
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Mengyu Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
| | - Dongguang Fan
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Ziwei Hu
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Jiarui Wu
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Tao Chen
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Miao Liu
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Xiaoguang Bao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
| | - Hengte Ke
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
| | - Xingyue Ji
- College of Pharmaceutical Science, Soochow University, Suzhou, Jiangsu 215021, China
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Ooi JMF, Fairhall JM, Spangler B, Chong DJW, Feng BY, Gamble AB, Hook S. Development of a bioorthogonal fluorescence-based assay for assessing drug uptake and delivery in bacteria. RSC Adv 2022; 12:15631-15642. [PMID: 35685699 PMCID: PMC9126673 DOI: 10.1039/d2ra02272a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/09/2022] [Indexed: 11/21/2022] Open
Abstract
Bioorthogonal chemistry can facilitate the development of fluorescent probes that can be used to sensitively and specifically detect the presence of biological targets. In this study, such an assay was developed to evaluate the uptake and delivery of antimicrobials into Escherichia coli, building on and extending previous work which utilised more resource intensive LCMS detection. The bacteria were genetically engineered to express streptavidin in the periplasmic or cytoplasmic compartments, which was used to localise a bioorthogonal probe (BCN-biotin). Azido-compounds which are delivered to these compartments react with the localised BCN-biotin–streptavidin in a concentration-dependent manner via a strain-promoted alkyne–azide cycloaddition. The amount of azido-compound taken up by bacteria was determined by quantifying unreacted BCN-biotin–streptavidin via an inverse electron demand Diels–Alder reaction between remaining BCN-biotin and a tetrazine-containing fluorescent dye. Following optimisation and validation, the assay was used to assess uptake of liposome-formulated azide-functionalised luciferin and cefoxitin. The results demonstrated that formulation into cationic liposomes improved the uptake of azide-functionalised compounds into the periplasm of E. coli, providing insight on the uptake mechanism of liposomes in the bacteria. This newly developed bioorthogonal fluorescence plate-reader based assay provides a bioactivity-independent, medium-to-high throughput tool for screening compound uptake/delivery. Bioorthogonal alkyne–azide and alkyne–tetrazine chemistries were used to assess drug uptake in bacteria. Azido-drug reacts with streptavidin bound alkyne-biotin within bacteria, the remaining unreacted alkyne is then quantified with a tetrazine-dye.![]()
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Affiliation(s)
| | | | - Benjamin Spangler
- Novartis Institutes for BioMedical Research (NIBR) in Emeryville California USA
| | | | - Brian Y Feng
- Novartis Institutes for BioMedical Research (NIBR) in Emeryville California USA
| | - Allan B Gamble
- School of Pharmacy, University of Otago Dunedin New Zealand
| | - Sarah Hook
- School of Pharmacy, University of Otago Dunedin New Zealand
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3
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Zhou Z, Feng S, Zhou J, Ji X, Long YQ. On-Demand Activation of a Bioorthogonal Prodrug of SN-38 with Fast Reaction Kinetics and High Releasing Efficiency In Vivo. J Med Chem 2021; 65:333-342. [PMID: 34963283 DOI: 10.1021/acs.jmedchem.1c01493] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although a myriad of bioorthogonal prodrugs have been developed, very few of them present both fast reaction kinetics and complete cleavage. Herein, we report a new bioorthogonal prodrug strategy with both fast reaction kinetics (k2: ∼103 M-1 s-1) and complete cleavage (>90% within minutes) using the bioorthogonal reaction pair of N-oxide and boron reagent. Distinctively, an innovative 1,6-elimination-based self-immolative linker is masked by N-oxide, which can be bioorthogonally demasked by a boron reagent for the release of both amino and hydroxy-containing payload in live cells. Such a strategy was applied to prepare a bioorthogonal prodrug for a camptothecin derivative, SN-38, resulting in 10-fold weakened cytotoxicity against A549 cells, 300-fold enhanced water solubility, and "on-demand" activation upon a click reaction both in vitro and in vivo. This novel bioorthogonal prodrug strategy presents significant advances over the existing ones and may find wide applications in drug delivery in the future.
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Affiliation(s)
- Zhou Zhou
- Laboratory of Medicinal Chemical Biology, Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Shun Feng
- Laboratory of Medicinal Chemical Biology, Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Jujun Zhou
- Laboratory of Medicinal Chemical Biology, Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Xingyue Ji
- Laboratory of Medicinal Chemical Biology, Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Ya-Qiu Long
- Laboratory of Medicinal Chemical Biology, Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
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Paterson DA, Fong WK, Hook S, Gamble AB. Hydrogen Sulfide-Responsive Bicontinuous Nanospheres. Biomacromolecules 2021; 22:4770-4782. [PMID: 34652153 DOI: 10.1021/acs.biomac.1c01070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Block copolymers (BCPs) that can self-assemble into particles and be triggered by disease-specific molecules such as hydrogen sulfide (H2S) have the potential to impact on drug delivery, decreasing off-target toxicities while increasing drug efficacy. However, the incorporation of H2S-responsive aryl azides into BCPs for self-assembly has been limited by heat, light, and radical sensitivities. In this study, a robust activator regenerated by the electron-transfer atom-transfer radical polymerization reaction was used to synthesize aryl-azide-containing BCPs under ambient conditions. Conditions controlling self-assembly of the BCPs into 150-200 nm particles and the physicochemical properties of the particles were investigated. The use of nanoprecipitation with tetrahydrofuran to promote self-assembly of the BCPs resulted in vesicle structures, while dimethylformamide or dimethylsulfoxide resulted in polymeric bicontinuous nanospheres (BCNs). Triggering of the BCPs and particles (vesicles or BCNs) via exposure to H2S revealed that unsubstituted aryl azides were readily reduced (by HS-), resulting in particle disruption or cross-linking. The relative polar nature of the particle bilayers containing unsubstituted aryl azides and the open structure of the BCNs did however limit encapsulation of small hydrophilic and hydrophobic payloads. Incorporation of a benzylamide substituent onto the aryl azide group increased the hydrophobicity of the particles and encapsulation of hydrophilic cargo but reduced sensitivity to H2S, likely due to the reduced penetration of HS- into the bilayer.
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Affiliation(s)
| | - Wye-Khay Fong
- Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Callaghan 2308, New South Wales, Australia
| | - Sarah Hook
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
| | - Allan B Gamble
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
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Fairhall JM, Camilli JC, Gibson BH, Hook S, Gamble AB. EGFR-targeted prodrug activation using bioorthogonal alkene-azide click-and-release chemistry. Bioorg Med Chem 2021; 46:116361. [PMID: 34411983 DOI: 10.1016/j.bmc.2021.116361] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/03/2021] [Indexed: 12/24/2022]
Abstract
Epidermal growth factor receptor (EGFR) is overexpressed in many cancers and therefore serves as an excellent target for prodrug activation. Functionalised trans-cyclooctenes (TCO) were conjugated to an EGFR antibody (cetuximab), providing a reagent for pre-targeting and localisation of the bioorthogonal reagent. The TCOs react with a 4-azidobenzyl carbamate doxorubicin prodrug via a [3 + 2]-cycloaddition and subsequent self-immolation leads to release of doxorubicin (click-and-release). In vitro cell-based assays demonstrated proof-of-concept, that cetuximab conjugated to highly strained TCO (AB-d-TCO) could bind to the EGFR in a melanoma cell line, and selectively activate the doxorubicin prodrug. In a non-EGFR expressing melanoma cell line, no significant prodrug activation was observed. In vivo experiments using this combination of AB-d-TCO and the azido-doxorubicin prodrug in a murine melanoma model revealed no significant anti-tumour activity or increased survival, suggesting there was insufficient prodrug activation and drug release at the tumour site.
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Affiliation(s)
| | - Júlia C Camilli
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
| | - Blake H Gibson
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
| | - Sarah Hook
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
| | - Allan B Gamble
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand.
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Dadhwal S, Lee A, Goswami SK, Hook S, Gamble AB. Synthesis and formulation of self‐immolative
PEG
‐aryl azide block copolymers and click‐to‐release reactivity with
trans
‐cyclooctene. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sumit Dadhwal
- School of Pharmacy University of Otago Dunedin New Zealand
- Department of Chemistry University of Otago Dunedin New Zealand
| | - Arnold Lee
- School of Pharmacy University of Otago Dunedin New Zealand
| | | | - Sarah Hook
- School of Pharmacy University of Otago Dunedin New Zealand
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Deb T, Tu J, Franzini RM. Mechanisms and Substituent Effects of Metal-Free Bioorthogonal Reactions. Chem Rev 2021; 121:6850-6914. [DOI: 10.1021/acs.chemrev.0c01013] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Titas Deb
- Department of Medicinal Chemistry, University of Utah, 30 S 2000 E, Salt Lake City, Utah 84112, United States
| | - Julian Tu
- Department of Medicinal Chemistry, University of Utah, 30 S 2000 E, Salt Lake City, Utah 84112, United States
| | - Raphael M. Franzini
- Department of Medicinal Chemistry, University of Utah, 30 S 2000 E, Salt Lake City, Utah 84112, United States
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Smeenk MLWJ, Agramunt J, Bonger KM. Recent developments in bioorthogonal chemistry and the orthogonality within. Curr Opin Chem Biol 2020; 60:79-88. [PMID: 33152604 DOI: 10.1016/j.cbpa.2020.09.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 02/09/2023]
Abstract
The emergence of bioorthogonal reactions has greatly advanced research in the fields of biology and medicine. They are not only valuable for labeling, tracking, and understanding biomolecules within living organisms, but also important for constructing advanced bioengineering and drug delivery systems. As the systems studied are increasingly complex, the simultaneous use of multiple bioorthogonal reactions is equally desirable. In this review, we take a look at the different bioorthogonal reactions that have recently been developed, the methods of cellular incorporation and the strategies to create orthogonality within the bioorthogonal landscape.
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Affiliation(s)
- Mike L W J Smeenk
- Department of Synthetic Organic Chemistry, Institute for Molecules and Materials, Radboud University, Nijmegen, the Netherlands
| | - Jordi Agramunt
- Department of Synthetic Organic Chemistry, Institute for Molecules and Materials, Radboud University, Nijmegen, the Netherlands
| | - Kimberly M Bonger
- Department of Synthetic Organic Chemistry, Institute for Molecules and Materials, Radboud University, Nijmegen, the Netherlands.
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