Aptamers Entirely Built from Therapeutic Nucleoside Analogues for Targeted Cancer Therapy
作者:Lijuan Zhu、Jiapei Yang、Yuan Ma、Xinyuan Zhu、Chuan Zhang
DOI:10.1021/jacs.1c09574
日期:2022.2.2
affinity of aptamers to their targets, aptamer–drug conjugates (ApDCs) have emerged as a promising drug delivery system for targeted cancer therapy. However, in a conventional ApDC, the aptamer segment usually just serves as a targeting moiety, and only a limited number of drug molecules are sequentially conjugated to the oligonucleotide, giving a relatively low drug loading capacity. To address this
由于适体对其靶标的特异性和高结合亲和力,适体-药物偶联物(ApDCs)已成为靶向癌症治疗的有前途的药物递送系统。然而,在传统的 ApDC 中,适体片段通常仅用作靶向部分,并且只有有限数量的药物分子顺序缀合到寡核苷酸上,从而提供相对较低的载药能力。为了应对这一挑战,我们在此使用四种临床批准的核苷类似物,包括氯法拉滨 (Clo)、ara-鸟苷 (AraG)、吉西他滨 (Ge) 和氟尿苷 (FdU),以取代适体序列中的所有天然核苷,生成一系列整个药物组成的 DNA 样寡聚体,称为药物调节剂。与它们的亲本适体相似,得到的药物调节剂保持靶向能力,可以特异性结合癌细胞表面过表达的靶受体。凭借100%的载药率、主动靶向能力和酶介导的活性药物释放,我们的药物驯化剂可以强烈诱导癌细胞凋亡并抑制肿瘤进展,为更好的靶向癌症治疗提供了新的潜力。