Abstract
The tumor microenvironment is a critical factor that induces drug resistance of tumors, which is called Physiological Drug Resistance (PDR). PDR can be further classified into pH-induced Physiological Drug Resistance (PIPDR) and Penetration- Defect Related Physiological Drug Resistance (PDPDR). Copolymeric nanoparticles can effectively reverse PDR. Section 14.1 will introduce Physiological Drug Resistance (PDR) and the role of copolymeric nanoparticles in its reversion. Because nanoparticles are of adjustable physical properties, multivalent targeting ability, high loading ability, scalability and they are dispersible in water and can pass through the biological barrier, thus further exploration of nanoscale medical technology can obtain safer and more effective radiographic imaging and detection, early diagnosis and individualized treatment for gastric cancer. Section 14.2 will summarize the use of nanomedicine in this field, including magnetic iron oxide nanoparticles, magnetic fluorescent nanoparticles, metal nanoparticles, semiconductor nanoparticles, quantum dots, nanodiamonds, nanowires, nanometer polymers, nano carbons and graphenes.
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