1
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Li K, Wang Q, Gao X, Xi H, Hua D, Jiang H, Qiu L, Lin J. Targeted delivery of activatable 131I-radiopharmaceutical for sustained radiotherapy with improved pharmacokinetics. J Control Release 2024:S0168-3659(24)00436-X. [PMID: 38971427 DOI: 10.1016/j.jconrel.2024.07.005] [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: 01/15/2024] [Revised: 04/28/2024] [Accepted: 07/02/2024] [Indexed: 07/08/2024]
Abstract
Targeted radionuclide therapy (TRT) is an effective treatment for tumors. Self-condensation strategies can enhance the retention of radionuclides in tumors and enhance the anti-tumor effect. Considering legumain is overexpressed in multiple types of human cancers, a 131I-labeled radiopharmaceutical ([131I]MAAN) based on the self-condensation reaction between 2-cyanobenzothiazole (CBT) and cysteine (Cys) was developed by us recently for treating legumain-overexpressed tumors. However, liver enrichment limits its application. In this study, a new radiopharmaceutical [131I]IM(HE)3AAN was designed and synthesized by introducing a hydrophilic peptide sequence His-Glu-His-Glu-His-Glu ((HE)3) into [131I]MAAN to optimize the pharmacokinetics. Upon activation by legumain under a reducing environment, hydrophilic [131I]IM(HE)3AAN could react with its precursor to form heterologous dimer [131I]H-Dimer that is highly hydrophobic. Cerenkov imaging revealed that [131I]IM(HE)3AAN displayed superior tumor selectivity and longer tumor retention time as compared with [131I]MAAN, with a significant reduction in the liver uptake. After an 18-day treatment with [131I]IM(HE)3AAN, the tumor proliferation was obviously inhibited, while no obvious injury was observed in the normal organs. These findings suggest that [131I]IM(HE)3AAN could serve as a promising drug candidate for treating legumain-overexpressed tumors.
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Affiliation(s)
- Ke Li
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China
| | - Qiqi Wang
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China
| | - Xiaoqing Gao
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China
| | - Hongjie Xi
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China
| | - Di Hua
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China
| | - Huijie Jiang
- Department of Radiology, The Second Affiliated Hospital of Harbin Medical University, Harbin 150086, China
| | - Ling Qiu
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China.
| | - Jianguo Lin
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi 214063, China.
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2
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Yano T, Yamada T, Isida H, Ohashi N, Itoh T. 2-cyanopyridine derivatives enable N-terminal cysteine bioconjugation and peptide bond cleavage of glutathione under aqueous and mild conditions. RSC Adv 2024; 14:6542-6547. [PMID: 38390509 PMCID: PMC10882492 DOI: 10.1039/d4ra00437j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 02/12/2024] [Indexed: 02/24/2024] Open
Abstract
Inspired by the chemical reactivity of apalutamide, we have developed an efficient method for N-terminal cysteine bioconjugation with 2-cyanopyridine derivatives. Systematic investigations of various 2-cyanopyridines revealed that 2-cyanopyridines with electron-withdrawing groups react efficiently with cysteine under aqueous and mild conditions. Moreover, the highly reactive 2-cyanopyridines enable the peptide bond cleavage of glutathione. The utility of our method is demonstrated by its application to the cysteine-selective chemical modification of bioactive peptides.
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Affiliation(s)
- Tetsuya Yano
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
| | - Takahiro Yamada
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
| | - Hiroaki Isida
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
| | - Nami Ohashi
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
| | - Toshimasa Itoh
- Showa Pharmaceutical University Machida Tokyo 194-8543 Japan
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3
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Patel M, Forte N, Bishop CR, Porter MJ, Dagwell M, Karu K, Chudasama V, Baker JR. The Nitrile Bis-Thiol Bioconjugation Reaction. J Am Chem Soc 2024; 146:274-280. [PMID: 38124442 PMCID: PMC10786040 DOI: 10.1021/jacs.3c08762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 12/01/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023]
Abstract
Electron-poor aryl nitriles are promising reagents for bioconjugation due to their high electrophilicity and selectivity for reaction with thiols, albeit generally in a reversible manner. A transient species has previously been observed in such reactions, involving the addition of two thiols to the nitrile functional group, forming a tetrahedral amino dithioacetal (ADTA). In this work, the reaction of heteroaryl nitriles with bis-thiols is explored in an attempt to generate stable ADTAs, which could facilitate new bioconjugation protocols. By use of a 1,2-dithiol, or the incorporation of an electrophilic trap into the aryl nitrile design, the formation of stable products is achieved. The resultant "nitrile bis-thiol" (NBT) reaction is then explored in the context of protein modification, specifically to carry out antibody conjugation. By addition of these nitriles to the reduced disulfide bond of an antibody fragment, it is shown that, depending on the reagent design, cysteine-to-lysine transfer or disulfide bridged NBT products can be generated. Both represent site-selective conjugates and are shown to be stable when challenged with glutathione under physiological conditions and upon incubation in serum. Furthermore, the NBT reaction is tested in the more challenging context of a full antibody, and all four disulfide bonds are effectively modified by these new one-carbon bridging reagents. Overall, this reaction of heteroaryl-nitriles with bis-thiols is shown to be highly efficient and versatile, of tunable reversibility, and offers enticing prospects as a new addition to the toolbox of biocompatible "click"-type reactions.
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Affiliation(s)
- Mikesh Patel
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - Nafsika Forte
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - Charlie R. Bishop
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - Michael J. Porter
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - Matthew Dagwell
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - Kersti Karu
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - Vijay Chudasama
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
| | - James R. Baker
- Department
of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, U.K.
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4
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Spears RJ, Chudasama V. Recent advances in N- and C-terminus cysteine protein bioconjugation. Curr Opin Chem Biol 2023; 75:102306. [PMID: 37236135 DOI: 10.1016/j.cbpa.2023.102306] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/12/2023] [Accepted: 03/20/2023] [Indexed: 05/28/2023]
Abstract
Advances in the site-specific chemical modification of proteins, also referred to as protein bioconjugation, have proved instrumental in revolutionary approaches to designing new protein-based therapeutics. Of the sites available for protein modification, cysteine residues or the termini of proteins have proved especially popular owing to their favorable properties for site-specific modification. Strategies that, therefore, specifically target cysteine at the termini offer a combination of these favorable properties of cysteine and termini bioconjugation. In this review, we discuss these strategies with a particular focus on those reported recently and provide our opinion on the future direction of the field.
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Affiliation(s)
- Richard J Spears
- Department of Chemistry, University College London, 20 Gordon Street, London, UK
| | - Vijay Chudasama
- Department of Chemistry, University College London, 20 Gordon Street, London, UK.
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5
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Proj M, Strašek N, Pajk S, Knez D, Sosič I. Tunable Heteroaromatic Nitriles for Selective Bioorthogonal Click Reaction with Cysteine. Bioconjug Chem 2023. [PMID: 37354098 PMCID: PMC10360065 DOI: 10.1021/acs.bioconjchem.3c00163] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2023]
Abstract
The binucleophilic properties of 1,2-aminothiol and its rare occurrence in nature make it a useful reporter for tracking molecules in living systems. The 1,2-aminothiol moiety is present in cysteine, which is a substrate for a biocompatible click reaction with heteroaromatic nitriles. Despite the wide range of applications for this reaction, the scope of nitrile substrates has been explored only to a limited extent. In this study, we expand the chemical space of heteroaromatic nitriles for bioconjugation under physiologically relevant conditions. We systematically assembled a library of 116 2-cyanobenzimidazoles, 1-methyl-2-cyanobenzimidazoles, 2-cyanobenzothiazoles, and 2-cyanobenzoxazoles containing electron-donating and electron-withdrawing substituents at all positions of the benzene ring. The compounds were evaluated for their stability, reactivity, and selectivity toward the N-terminal cysteine of model oligopeptides. In comparison to the benchmark 6-hydroxy-2-cyanobenzothiazole or 6-amino-2-cyanobenzothiazole, we provide highly selective and moderately reactive nitriles as well as highly reactive yet less selective analogs with a variety of enabling attachment chemistries to aid future applications in bioconjugation, chemical biology, and nanomaterial science.
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Affiliation(s)
- Matic Proj
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Ljubljana, Askerceva 7, Ljubljana 1000, Slovenia
| | - Nika Strašek
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Ljubljana, Askerceva 7, Ljubljana 1000, Slovenia
| | - Stane Pajk
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Ljubljana, Askerceva 7, Ljubljana 1000, Slovenia
| | - Damijan Knez
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Ljubljana, Askerceva 7, Ljubljana 1000, Slovenia
| | - Izidor Sosič
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Ljubljana, Askerceva 7, Ljubljana 1000, Slovenia
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6
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Hu X, Tang R, Bai L, Liu S, Liang G, Sun X. CBT‐Cys click reaction for optical bioimaging in vivo. VIEW 2023. [DOI: 10.1002/viw.20220065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
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7
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Liu S, Ye H, Yi L, Xi Z. A unique reaction of diphenylcyclopropenone and 1,2-aminothiol with the release of thiol for multiple bioconjugation. Chem Commun (Camb) 2023; 59:1497-1500. [PMID: 36655850 DOI: 10.1039/d2cc06419g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Selective reaction of diphenylcyclopropenone (DPCP) and 1,2-aminothiol in water at pH 7.4 produces an amide conjugate with the release of thiol. In addition, structural modifications of DPCP enable the coupling rate to be tuned with a reaction constant of +3.68. Based on this chemistry, triple labelling was demonstrated by treating an N-terminal cysteine peptide with DPCP-Cl followed by thiol-maleimide and tyrosine-diazonium couplings in one pot. We anticipate that the DPCP motif will be a useful toolkit for multiple bioconjugation.
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Affiliation(s)
- Shanshan Liu
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| | - Haishun Ye
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| | - Long Yi
- State Key Laboratory of Organic-Inorganic Composites and Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
| | - Zhen Xi
- State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical Biology, College of Chemistry, National Pesticide Engineering Research Center, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
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