Enhancement of the brain delivery of methotrexate with administration of mid-chain ester prodrugs: In vitro and in vivo studies
作者:Nadia Fattahi、Ali Ramazani、Mehrdad Hamidi、Maliheh Parsa、Kobra Rostamizadeh、Hamid Rashidzadeh
DOI:10.1016/j.ijpharm.2021.120479
日期:2021.5
folds. In addition, in vivo toxicity on Artemia salina (A. salina) showed that the lipophilic MTX prodrugs have been able to partially mask the toxic profile of free MTX, at the same concentrations. These findings were also in compliance with hemolysis assay results, which confirm that the conjugates has not made the drug more toxic. Furthermore, in vivo study in rat model, was employed to determine the
在本研究中,以提高甲氨蝶呤(MTX)对大脑的通透性为目的,合成了含有酯官能团的亲脂MTX前药。通过FT-IR,NMR和质谱研究对合成前药的化学结构进行了表征和确认。根据体外细胞毒性研究的结果,所有合成的前药均导致U87癌细胞在72小时内IC50降低,与游离MTX相比,甲氨蝶呤二己基甲酸酯(MTX-DH)观察到了最佳结果。导致IC50降低多达6倍。另外,体内对卤虫(盐沼曲霉)的毒性表明,在相同浓度下,亲脂性MTX前药已能够部分掩盖游离MTX的毒性。这些发现也与溶血测定结果一致,该结果证实了缀合物没有使药物更具毒性。此外,体内在大鼠模型中进行了一项研究,确定了大脑和血浆中同时存在的药物浓度。根据获得的结果,MTX-DH和甲氨蝶呤二辛基酯(MTX-DO)组的脑血浆浓度比(Kp值)明显高于游离MTX。此外,脑实质吸收MTX的清除率显着增加(MTX-DH和MTX-DO前药分别增加3.85和9.08倍