特定于T细胞的siRNA输送抑制了人性化小鼠的HIV-1感染
Priti Kumar1, Hong-Seok Ban, Sang-Soo Kim
1Immune Disease Institute and Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
Cell
|August 12, 2008
概括
RNA干扰 (RNAi) 疗法在艾滋病毒治疗方面表现有前途. 在临床前模型中,一种新的T细胞特异性传递系统有效地抑制了HIV复制,并防止了CD4 T细胞损失.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 基因治疗 基因治疗
背景情况:
- 治疗艾滋病毒感染的RNA干扰 (RNAi) 在siRNA传递和合适的动物模型方面面临挑战.
- 有效的siRNA传递到点细胞对于控制HIV复制至关重要.
研究的目的:
- 评估T细胞特异性siRNA输送对艾滋病毒感染的治疗潜力.
- 在临床前动物模型中评估一种新型输送系统的疗效.
主要方法:
- 通过将CD7特异性抗体与oligo-9-arginine结合,开发了一种针对T细胞的siRNA传递系统 (scFvCD7-9R).
- 使用了NOD/SCIDIL2玛/-小鼠与人体淋巴细胞 (Hu-PBL) 或造血干细胞 (Hu-HSC) 复制.
- 向感染HIV的小鼠注射了与scFvCD7-9R复合的抗CCR5和抗病毒siRNA.
主要成果:
- scFvCD7-9R介导的T细胞特异性siRNA传递,显著抑制了Hu-PBL小鼠中的HIV复制.
- 治疗预防了与疾病相关的CD4 T细胞损失,并恢复了HIV+外周血液单核细胞在HIV+外周血液单核细胞在小鼠中的CD4 T细胞数量.
- 在Hu-HSC小鼠中,向天真T细胞输送的抗病毒siRNA有效抑制了病毒性血清.
结论:
- 使用scFvCD7-9R的T细胞特异性siRNA输送是HIV治疗的可行策略.
- 这种方法在HIV感染的临床前动物模型中显示出显著的治疗潜力.
- 克服siRNA传递挑战是推动基于RNAi的HIV治疗的关键.
相关概念视频
02:30siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
02:15Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...