日韩成人在线网站_国产精品观看_丝袜美腿中文字幕_涩涩app_欧美猛男大巨大1069_777在线视频_西西人体大胆4444www_九月色婷婷_天堂中文在线看_日本精品一级_午夜影院久久_男生操女生的_日本 奴役 捆绑 受虐狂_91免费在线播放_成人黄色免费观看

Nanomedicine (nanomedicine) is a drug carrier with special functions, which can realize targeted drug delivery, controlled release and multimodal imaging. Nanodrugs can overcome the problem of multidrug resistance (multidrug resistance, MDR) and improve the efficacy and safety of chemotherapeutic drugs. MDR refers to the phenomenon that tumor cells develop tolerance to one or more chemotherapeutic drugs, leading to chemotherapy failure. The mechanisms of MDR include tumor cell heterogeneity, changes of tumor microenvironment, overexpression of cell membrane transporproteins, abnormalities of apoptosis signaling pathways, and enhanced DNA repair capacity.