Cell-specific RNA aptamer against human CCR5 specifically targets HIV-1 susceptible cells and inhibits HIV-1 infectivity.

Cell-specific RNA aptamer against human CCR5 specifically targets HIV-1 susceptible cells and inhibits HIV-1 infectivity.
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DOI:
10.1016/j.chembiol.2015.01.005
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发表时间:
2015-03-19
影响因子:
--
通讯作者:
Rossi JJ
Rossi JJ
中科院分区:
生物1区
文献类型:
--
作者:
Zhou J;Satheesan S;Li H;Weinberg MS;Morris KV;Burnett JC;Rossi JJ

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C-C趋化因子受体5型(CCR 5)是由T细胞和巨噬细胞表达的受体,其充当嗜巨噬细胞的HIV-1的共受体。CCR 5的缺失与对HIV-1的耐药性有关。在这里,我们结合联合收割机活细胞为基础的SELEX与高通量测序技术,以产生能够特异性靶向HIV-1易感细胞(作为siRNA递送剂)和抑制HIV-1感染性(作为抗病毒剂)通过阻断HIV-1进入细胞所需的CCR 5。最佳候选物之一G-3有效结合并内化到表达人CCR 5的细胞中。G-3特异性中和原代外周血单核细胞中的R5病毒感染,并在体内产生具有纳摩尔IC 50的人CD 4 + T细胞。G-3还能够将功能性siRNA转移到CCR 5表达细胞。总的来说,细胞特异性的、内化的、CCR 5靶向的适体和适体-siRNA缀合物通过提供各种治疗部分的细胞类型或组织特异性递送而提供了克服HIV-1中的一些当前耐药性挑战的希望。
The C-C chemokine receptor type 5 (CCR5) is a receptor expressed by T-cells and macrophages that serves as a co-receptor for macrophage-tropic HIV-1. Loss of CCR5 is associated with resistance to HIV-1. Here we combine the live cell-based SELEX with high throughput sequencing technology to generate CCR5 RNA aptamers capable of specifically targeting HIV-1 susceptible cells (as siRNA delivery agent) and inhibiting HIV-1 infectivity (as antiviral agent) via block of the CCR5 required for HIV-1 to enter cells. One of the best candidates, G-3, efficiently bound and was internalized into human CCR5 expressing cells. The G-3 specifically neutralized R5 virus infection in primary peripheral blood mononuclear cells, and in vivo generated human CD4+ T cells with a nanomolar IC50. G-3 was also capable of transferring functional siRNAs to CCR5 expressing cells. Collectively, the cell-specific, internalizing, CCR5-targeted aptamers and aptamer-siRNA conjugates offer promise for overcoming some of the current challenges of drug resistance in HIV-1 by providing cell-type- or tissue-specific delivery of various therapeutic moieties.
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