[EN] HYDROPHILIC POLYMER CONJUGATE WITH MULTIPLE ANTIVIRAL AGENTS FOR TREATING A VIRAL INFECTION [FR] CONJUGUÉ POLYMÈRE HYDROPHILE À PLUSIEURS AGENTS ANTIVIRAUX POUR LE TRAITEMENT D'UNE INFECTION VIRALE
POLYMER OF GAMMA-GLUTAMYL TRANSPEPTIDASE CATALYZING HYDROLYSIS-INDUCED CHARGE REVERSAL AND ITS APPLICATION IN THE FIELD OF DRUG DELIVERY
申请人:ZHEJIANG UNIVERSITY
公开号:US20200215197A1
公开(公告)日:2020-07-09
This present invention relates to a polymer of γ-glutamyl transpeptidase catalyzing hydrolysis-induced charge reversal. The polymer comprises a γ-glutamyl transpeptidase-responsive element represented by Formula (I). When the polymer is used as drug carrier for anticancer drug, it can have a long circulation time in the blood, and can realize a charge reversal from negatively charged or the neutral to positively charged around the tumor blood vessel region, so that the positively charged polymer effectively penetrates deep into the tumor tissue, fast entering into the tumor cells, and greatly improves the therapeutic effect of the drug on the tumor. This overcomes the problems of slow diffusion of traditional polymer drug carriers in tumors and weak interaction with tumor cells, and has great significance in the field of anticancer treatment in the medical field.
malignant tumors. The tumor microenvironment(TME)-responsive intelligent drug delivery systems are still the hot research topics in delivering chemotherapeutic drugs. Camptothecin (CPT) possesses very strong antitumor activities, but its clinical application is hindered by its poor water-solubility and serious toxic side effects. Herein, a new intelligent and TME-responsive P(CPT-MAA) prodrug nanogel was
reductive environment and at low pH. In vitro cytotoxicity results suggested that the anticancer efficacy of dual-responsive CCDO/DOX micelles was superior to that of CCDO micelles. In addition, in vivo results verified good blood compatibility of the unimolecular micelles. This integrated dual-responsivedrugdelivery system may solve the low drug loading and poor controlled release problems found in