PGP and gastric cancer: After NIR irradiation, PTX@GO-PEG-OSA could generate excessive ROS, attack mitochondrial respiratory chain complex enzymes, reduce adenosine-triphosphate (ATP) supplements for P-glycoprotein(P-gp), and effectively inhibit P-gp’s efflux pump function, thereby inducing obvious antitumor effects on gastric cancer [231].