口服的siRNA向巨细胞Map4k4,可以抑制全身炎症
Myriam Aouadi1, Gregory J Tesz, Sarah M Nicoloro
1Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.
Nature
|May 2, 2009
概括
研究人员开发了β1,3-D-葡萄糖封装的siRNA颗粒 (GeRPs) 用于口服. 这些GeRP有效地沉默了巨细胞中的基因,为炎症性疾病提供了新的治疗策略.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 通过RNA干扰 (RNAi) 进行基因沉默具有治疗前景,但面临着交付挑战.
- 巨细胞是治疗诸如类风湿性关节炎和糖尿病等炎症性疾病的关键标.
- 在体内有效地将短干扰RNA (siRNA) 传递给细胞仍然是一个重大障碍.
研究的目的:
- 为siRNA向巨细胞设计高效的口服输送载体.
- 评估这些载体在静止特定基因的有效性,在体外和体内.
- 使用这种传递系统,识别新的炎症媒介.
主要方法:
- 开发了β1,3-D-葡萄糖封装的siRNA粒子 (GeRPs).
- 通过口腔给小鼠,给药GeRPs.
- 来自各种组织的巨细胞中基因沉默 (Tnf-alpha,Map4k4) 的量化.
- 评估炎症标志物 (Tnf-alpha,IL-1beta) 和生存率,以应对脂多糖的挑战.
主要成果:
- 在实验室和体内,GeRPs在小鼠巨细胞中表现出强大的基因沉默.
- 口服向Tnf-alpha的GeRPs降低了Tnf-alpha mRNA和血清水平.
- Map4k4被确定为细胞因子表达的新型调解剂.
- 沉默Map4k4通过减少Tnf-alpha和IL-1beta保护小鼠免受致命的内毒性.
结论:
- GeRPs为siRNA向巨细胞提供了一个有效的口服输送策略.
- 这项技术使得基因沉默 in vivo,在炎症性疾病的潜在应用.
- Map4k4是调节炎症反应的有希望的新目标.
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