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HER2-2-ME-BSANPs单抗特异性的2-甲氧基雌二醇白蛋白纳米粒的研究与制备
2022-07-29 16:15:00 【瑞禧生物小晓】
今天为大家带来的知识是HER2-2-ME-BSANPs单抗特异性的2-甲氧基雌二醇白蛋白纳米粒的研究与制备,它以牛血清白蛋白(BSA)为载体,抗HER2单克隆抗体为靶头,将“弹头”2-甲氧基雌二醇递送至特定部位,增加蓄积及摄取。一起来看!

第一部分,HER2-2-ME-BSANPs的制备及相关制剂学表征。
采用去溶剂化法制备2-甲氧基雌二醇白蛋白纳米粒(2-ME-BSANPs),再利用异型双功能交联剂SPDP将抗HER2单抗与2-ME-BSANPs进行偶联反应,制备特异性纳米粒HER2-2-ME-BSANPs。通过SDS-PAGE电泳、凝集试验和免疫荧光实验,证实抗HER2单抗与2-ME-BSANPs 偶联成功,该系统具有高度免疫活性及特异性;DTT法检测抗HER2单抗与2-ME-BSANPs偶联比为36.28%,可实现高效靶向作用;HER2-2-ME-BSANPs平均粒径和电位分别为(221.5+2.1) nm和(-25.59土0.69)mV,纳米粒大小均匀、稳定;HPLC检测HER2-2-ME-BSANPs的包封率为( 89.15+3.80)%,增加了2-ME的溶解性、提高了其生物利用度;制剂HER2-2-ME-BSANPs的体外实验结果表明,相比于2-ME,HER2-2-ME-BSANPs具有缓释性,延长了2-ME的半衰期。
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