Selection of PD1/PD-L1 X-Aptamers.

Selection of PD1/PD-L1 X-Aptamers.
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DOI:
10.1016/j.biochi.2017.09.006
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发表时间:
2018-03
期刊:
影响因子:
3.9
通讯作者:
Yang X
Yang X
中科院分区:
生物学3区
文献类型:
--
作者:
Wang H;Lam CH;Li X;West DL;Yang X

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特异性的,化学修饰的适体(x -适体)被鉴定出针对两种免疫检查点蛋白,重组程序性死亡1 (PD-1)和程序性死亡配体1 (PD-L1)。使用基于头的X-Aptamer (XA)文库进行选择,该文库包含几个不同的氨基酸官能团,连接到dU的5位。选择的XA-PD1和XA-PDL1的结合亲和力和特异性通过hPD-1和hPD-L1表达细胞以及与人胰腺导管腺癌组织的结合来验证。所选择的PD1和PDL1 XAs可以在体外模拟抗体功能。
Specific, chemically modified aptamers (X-Aptamers) were identified against two immune checkpoint proteins, recombinant Programmed Death 1 (PD-1) and Programmed Death Ligand 1 (PD-L1). Selections were performed using a bead-based X-Aptamer (XA) library containing several different amio acid functional groups attached to dU at the 5-position. The binding affinity and specificity of the selected XA-PD1 and XA-PDL1 were validated by hPD-1 and hPD-L1 expression cells, as well as by binding to human pancreatic ductal adenocarcinoma tissue. The selected PD1 and PDL1 XAs can mimic antibody functions in in vitro assays.
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