2018
DOI: 10.1021/acs.jmedchem.7b01775
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Synthesis and Evaluation of Hydrogen Peroxide Sensitive Prodrugs of Methotrexate and Aminopterin for the Treatment of Rheumatoid Arthritis

Abstract: A series of novel hydrogen peroxide sensitive prodrugs of methotrexate (MTX) and aminopterin (AMT) were synthesized and evaluated for therapeutic efficacy in mice with collagen induced arthritis (CIA) as a model of chronic rheumatoid arthritis (RA). The prodrug strategy selected is based on ROS-labile 4-methylphenylboronic acid promoieties linked to the drugs via a carbamate linkage or a direct C-N bond. Activation under pathophysiological concentrations of HO proved to be effective, and prodrug candidates wer… Show more

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Cited by 57 publications
(54 citation statements)
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“…Similar to this approach, the phenylboronic acid prodrug 49 ( Figure 6 ) of methotrexate ( 48 , Figure 6 ) was designed for a more selective and effective treatment of rheumatoid arthritis (RA), since the presence of high levels of ROS in inflammatory cells is associated with RA pathology [ 52 ].…”
Section: Synthesis and Biological Applications Of Boronic Acids Dementioning
confidence: 99%
“…Similar to this approach, the phenylboronic acid prodrug 49 ( Figure 6 ) of methotrexate ( 48 , Figure 6 ) was designed for a more selective and effective treatment of rheumatoid arthritis (RA), since the presence of high levels of ROS in inflammatory cells is associated with RA pathology [ 52 ].…”
Section: Synthesis and Biological Applications Of Boronic Acids Dementioning
confidence: 99%
“…These functional groups undergo self-immolation under some specific triggering conditions (trifluoroacetic acid, piperidine), which in turn releases the attached cargo [ 177 , 178 ]. Redox-triggered self-immolative linkers could be broadly divided into three categories by triggers: transition metal (e.g., Zn, Pd) based reagents [ 179 , 180 , 181 ], reducing reagents (DTT, GSH or TCEP) [ 182 ], and oxidant (e.g., H 2 O 2 ) [ 183 , 184 , 185 , 186 ]. Disulfide bonds are the most widely used reductant-responsive linkers.…”
Section: Stimulus-responsive Systemsmentioning
confidence: 99%
“…Deprotection of the boc-moiety was performed using a mixture of trifluoroacetic acid (TFA) in dichloromethane to yield the corresponding TFA salt of prodrug A. However, standard procedures described in the literature to couple compound 2 via transformation into a chloroformate did not yield the desired product 3 [23]. In the case of the alkylated prodrug B, alcohol 2 was oxidized to the corresponding aldehyde 4 using 2-iodobenzoic acid (IBX) in DMSO (Scheme 2A).…”
Section: Synthesismentioning
confidence: 99%
“…One characteristic difference of cancer cells is an up to ten-fold higher concentration of reactive oxygen species (ROS) like hydrogen peroxide (H 2 O 2 ) [20] compared to healthy tissues [21]. As a trigger moiety for ROS-mediated prodrug activation, boronic acids have been used, for example, for anticancer drugs like aminoferrocene [22], antifolates [23] or several alkylating agents [24]. In the case of phenylboronic acid trigger units, upon reaction with H 2 O 2 , the generated boric acid is readily hydrolyzed, and the free drug is released via an electron-migration cascade with simultaneous formation of a quinone methide species from the linker moiety (Scheme 1).…”
Section: Introductionmentioning
confidence: 99%