Replication competent molecular clones of HIV-1 expressing Renilla luciferase facilitate the analysis of antibody inhibition in PBMC.

Replication competent molecular clones of HIV-1 expressing Renilla luciferase facilitate the analysis of antibody inhibition in PBMC.
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DOI:
10.1016/j.virol.2010.08.028
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发表时间:
2010-12-05
期刊:
影响因子:
3.7
通讯作者:
Ochsenbauer C
Ochsenbauer C
中科院分区:
医学3区
文献类型:
--
作者:
Edmonds TG;Ding H;Yuan X;Wei Q;Smith KS;Conway JA;Wieczorek L;Brown B;Polonis V;West JT;Montefiori DC;Kappes JC;Ochsenbauer C

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人类免疫缺陷病毒1型(HIV-1)的有效疫苗开发将需要确定疫苗免疫原引发不同HIV-1毒株的中和抗体(NAb)的能力的测定。为了便于在基于外周血单核细胞(PBMC)的测定中进行NAb评估,我们开发了一种基于表达HIV-1前病毒骨架的海肾荧光素酶(LucR)的测定适应性平台。将LucR插入到pNL 4 -3 DNA中,保留所有病毒开放阅读框。原病毒基因组被改造以促进不同HIV-1 env序列的表达,从而允许在同基因背景下进行分析。所得的Env-IMC-LucR病毒是感染性的,并且LucR在PBMC中的多次复制中稳定表达。靶向TZM-bl细胞的HIV-1中和与病毒(LucR)和细胞(萤火虫荧光素酶)读数相比高度相关。在PBMC中,可以在单个或多个复制循环内分析NAb活性。这些结果代表了用于评估HIV-1疫苗免疫原效力的基于PBMC的中和试验的进展。
Effective vaccine development for human immunodeficiency virus type 1 (HIV-1) will require assays that ascertain the capacity of vaccine immunogens to elicit neutralizing antibodies (NAb) to diverse HIV-1 strains. To facilitate NAb assessment in peripheral blood mononuclear cell (PBMC)-based assays, we developed an assay-adaptable platform based on a Renilla luciferase (LucR) expressing HIV-1 proviral backbone. LucR was inserted into pNL4-3 DNA, preserving all viral open reading frames. The proviral genome was engineered to facilitate expression of diverse HIV-1 env sequences, allowing analysis in an isogenic background. The resulting Env-IMC-LucR viruses are infectious, and LucR is stably expressed over multiple replications in PBMC. HIV-1 neutralization, targeting TZM-bl cells, was highly correlative comparing virus (LucR) and cell (firefly luciferase) readouts. In PBMC, NAb activity can be analyzed either within a single or multiple cycles of replication. These results represent advancement toward a standardizable PBMC-based neutralization assay for assessing HIV-1 vaccine immunogen efficacy.
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