dihydrazide, caprolactone, N-Boc-ethanolamine, doxorubicin
hydrochloride (DOX·HCl), dicyclohexylcarbodiimide (DCC), 4-dimethylaminopyridine
(DMAP), ethyl-3-(3-dimethylaminopropyl) carbodiimidehydrochloride
(EDC·HCl), and N-hydroxysuccinimide (NHS) were
purchased from Sigma-Aldrich Co., Ltd. (Beijing, China). N,N-Dimethylformamide (DMF) and triethylamine (TEA)
were purchased from Alfa Aesar Co., Ltd. (Shanghai, China). 2,7-Dichlorofluorescin
diacetate (DCFH-DA) was purchased from Yeasen Biotechnology Co., Ltd.
(Shanghai, China). 4′,6-Diamidino-2-phenylindole (DAPI), propidium
iodide (PI), 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium
bromide (MTT), and TUNEL agents were obtained from Solarbio Co., Ltd.
(Beijing, China). Cell culture agents were purchased from GIBCO. Antibodies
were acquired from Abcam Co., Ltd. (Shanghai, China).