REVERSING THE UNDESIRABLE pH-PROFILE OF DOXORUBICIN VIA ACTIVATION OF A DISUBSTITUTED MALEAMIC ACID PRODRUG AT TUMOR ACIDITY
申请人:The Research Foundation for The State University of new York
公开号:US20210128592A1
公开(公告)日:2021-05-06
A pre-prodrug, comprising a drug, e.g., doxorubicin, which has off-target toxicity (e.g., cardiotoxicity) with respect to its antineoplastic activity, and an amine functionality of the drug incorporated into a disubstituted maleimide (DMI). The pre-prodrug may be linked to a targeting or de-targeting agent or a polar modulator, e.g., charged ligand, amino acid, peptide, etc., to increase therapeutic index. The pre-prodrug is hydrolyzed to the prodrug, having a disubstituted maleamic acid (DMA). A polar modulator such as glutamic acid prevents cellular uptake of the prodrug, but not the doxorubicin drug released from the prodrug after dissociation. The prodrug is pH sensitive, and below pH 7.0, tends to cleave to form free drug and cyclized maleic anhydride. Tumor environments tend to be more acidic, e.g., pH 6.8, than cardiac tissue, e.g., pH 7.4, and therefore the heart is spared while the drug is selectively released within a tumor.
一种前前药,包括一种药物,例如阿霉素,其在抗肿瘤活性方面存在非靶向毒性(例如心脏毒性),以及药物的胺基功能并入二取代马来酰亚胺(DMI)中。前前药可以与靶向或去靶化剂或极性调节剂连接,例如带电配体、氨基酸、肽等,以增加治疗指数。前前药水解为前药,具有二取代马来酰胺(DMA)。极性调节剂如谷氨酸可防止前药的细胞摄取,但不影响前药解离后释放的阿霉素药物。前药对pH敏感,在pH 7.0以下,倾向于裂解形成游离药物和环化马来酸酐。肿瘤环境往往比心脏组织更酸性,例如pH 6.8,因此心脏得以保护,而药物选择性地在肿瘤内释放。