Drug Repurposing by Siderophore Conjugation: Synthesis and Biological Evaluation of Siderophore‐Methotrexate Conjugates as Antibiotics

Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable...

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Published inAngewandte Chemie International Edition Vol. 61; no. 36; pp. e202204139 - n/a
Main Authors Zhao, Sheng, Wang, Zhi‐Peng, Lin, Zihua, Wei, Guoxing, Wen, Xumei, Li, Siyu, Yang, Xiaohong, Zhang, Qun, Jing, Chunmei, Dai, Yuanwei, Guo, Jian, He, Yun
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Abstract Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct “Trojan horse” antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00×103‐fold improved activity against Gram‐positive Streptococcus pneumoniae (S. pneumoniae) and Gram‐negative Yersinia enterocolitica (Y. enterocolitica) compared with Mtx, while possessing 2.31×103‐fold reduced human cytotoxicity, resulting in 2.08×106‐fold improvements in the therapeutic index. This proof‐of‐principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs. The conjugation of methotrexate (Mtx) with a siderophore to construct “Trojan horse” antibacterial conjugates is reported. The most potent conjugate exhibited over 1000‐fold improved activity against Gram‐positive Streptococcus pneumoniae and Gram‐negative Yersinia enterocolitica compared with Mtx, while possessing 2313‐fold reduced human cytotoxicity, resulting in 2.08×106‐fold improvements in the therapeutic index.
AbstractList Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct "Trojan horse" antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00×103 -fold improved activity against Gram-positive Streptococcus pneumoniae (S. pneumoniae) and Gram-negative Yersinia enterocolitica (Y. enterocolitica) compared with Mtx, while possessing 2.31×103 -fold reduced human cytotoxicity, resulting in 2.08×106 -fold improvements in the therapeutic index. This proof-of-principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs.Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct "Trojan horse" antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00×103 -fold improved activity against Gram-positive Streptococcus pneumoniae (S. pneumoniae) and Gram-negative Yersinia enterocolitica (Y. enterocolitica) compared with Mtx, while possessing 2.31×103 -fold reduced human cytotoxicity, resulting in 2.08×106 -fold improvements in the therapeutic index. This proof-of-principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs.
Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct “Trojan horse” antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00×103‐fold improved activity against Gram‐positive Streptococcus pneumoniae (S. pneumoniae) and Gram‐negative Yersinia enterocolitica (Y. enterocolitica) compared with Mtx, while possessing 2.31×103‐fold reduced human cytotoxicity, resulting in 2.08×106‐fold improvements in the therapeutic index. This proof‐of‐principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs.
Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct “Trojan horse” antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00×10 3 ‐fold improved activity against Gram‐positive Streptococcus pneumoniae ( S. pneumoniae ) and Gram‐negative Yersinia enterocolitica ( Y. enterocolitica ) compared with Mtx, while possessing 2.31×10 3 ‐fold reduced human cytotoxicity, resulting in 2.08×10 6 ‐fold improvements in the therapeutic index. This proof‐of‐principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs.
Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct “Trojan horse” antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00×103‐fold improved activity against Gram‐positive Streptococcus pneumoniae (S. pneumoniae) and Gram‐negative Yersinia enterocolitica (Y. enterocolitica) compared with Mtx, while possessing 2.31×103‐fold reduced human cytotoxicity, resulting in 2.08×106‐fold improvements in the therapeutic index. This proof‐of‐principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs. The conjugation of methotrexate (Mtx) with a siderophore to construct “Trojan horse” antibacterial conjugates is reported. The most potent conjugate exhibited over 1000‐fold improved activity against Gram‐positive Streptococcus pneumoniae and Gram‐negative Yersinia enterocolitica compared with Mtx, while possessing 2313‐fold reduced human cytotoxicity, resulting in 2.08×106‐fold improvements in the therapeutic index.
Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly inhibit bacterial dihydrofolate reductase (DHFR). However, its poor permeability into bacteria and potent human cytotoxicity make it unsuitable as an antibacterial. Herein, we reported the conjugation of Mtx with a siderophore to construct "Trojan horse" antibacterials. The most potent conjugate 8 with nanomolar minimum inhibitory concentration (MIC) values exhibited over 1.00x10(3)-fold improved activity against Gram-positive Streptococcus pneumoniae (S. pneumoniae) and Gram-negative Yersinia enterocolitica (Y. enterocolitica) compared with Mtx, while possessing 2.31x10(3)-fold reduced human cytotoxicity, resulting in 2.08x10(6)-fold improvements in the therapeutic index. This proof-of-principle study verifies that siderophore conjugation is an effective strategy for developing new antibacterials from anticancer drugs.
ArticleNumber 202204139
Author Wen, Xumei
Guo, Jian
Lin, Zihua
Jing, Chunmei
Zhao, Sheng
Li, Siyu
Zhang, Qun
He, Yun
Wang, Zhi‐Peng
Wei, Guoxing
Yang, Xiaohong
Dai, Yuanwei
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Keywords IRON UPTAKE
Conjugate
Siderophore
Antimicrobials
CATECHOL
Drug Repurpose
SYSTEMS
Methotrexate
ALBOMYCIN
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Snippet Drug repurposing is considered a promising strategy to fight antimicrobial resistance (AMR). Methotrexate (Mtx), a classical anticancer drug, could strongly...
Source Web of Science
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wiley
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StartPage e202204139
SubjectTerms Antibiotics
Antimicrobial resistance
Antimicrobials
Antineoplastic drugs
Antitumor agents
Chemistry
Chemistry, Multidisciplinary
Conjugate
Conjugates
Conjugation
Cytotoxicity
Dihydrofolate reductase
Drug Repurpose
Methotrexate
Minimum inhibitory concentration
Permeability
Physical Sciences
Reductases
Science & Technology
Siderophore
Streptococcus pneumoniae
Toxicity
Title Drug Repurposing by Siderophore Conjugation: Synthesis and Biological Evaluation of Siderophore‐Methotrexate Conjugates as Antibiotics
URI https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fanie.202204139
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