Adv Sci:新型siRNA纳米颗粒有效地逆转了肝损伤

2017-05-31 佚名 MaterialsViews

RNA干扰(RNAi)作为后基因组时代的一种下调基因表达的工具已被广泛用于基因功能的研究以及疾病的治疗。近年来随着RNA干扰技术在生命领域的应用以及研究的深入,RNA干扰成为了生命科学领域的一个研究热点。小干扰RNA (siRNA)介导的RNA干扰正是通过下调致病基因从而对很多人类疾病实现治疗,如癌症、自身免疫性疾病以及病毒感染性疾病等。但由于siRNA自身的局限性(细胞内不稳定性、肾清除率高、细

RNA干扰(RNAi)作为后基因组时代的一种下调基因表达的工具已被广泛用于基因功能的研究以及疾病的治疗。近年来随着RNA干扰技术在生命领域的应用以及研究的深入,RNA干扰成为了生命科学领域的一个研究热点。小干扰RNA (siRNA)介导的RNA干扰正是通过下调致病基因从而对很多人类疾病实现治疗,如癌症、自身免疫性疾病以及病毒感染性疾病等。但由于siRNA自身的局限性(细胞内不稳定性、肾清除率高、细胞通透性差等)使其不能直接用于疾病治疗,需要通过良好的运输体系的运输才能实现其临床应用的潜力。因此设计并实现一种理想的运输体系是研究者们一直追求的目标。

重庆大学创新药物研究中心冯旭利教授及其研究团队在siRNA运输方面取得了重要进展。她们采用生物相容性良好的PEG作为主体框架,通过酸敏感的功能团采用无铜点击化学反应(Click Reaction)将siRNA通过共价键结合到主体材料上,该体系可大大提高siRNA的稳定性同时共价键的结合增加了siRNA的载药量; PEG的选择保证了材料良好的生物相容性,同时也增加了运输体系的血液循环时间;另一方面,该运输体系对pH变化具有良好的刺激响应性,使siRNA在吞人细胞内后能被有效地释放,保证了下游RNA干扰沉默的有效性。这些特征使得该体系不仅在细胞水平上,同时也在动物实验上实现了良好的特异性基因沉默,有效地逆转了肝损伤。相关论文在线发表在Adv. Sci.。

相关工作得到了重庆大学“百人计划”启动资金以及中央高校基本科研业务费等的资助。

原始出处:

Tang Y1, Zeng Z1, He X,et al.SiRNA Crosslinked Nanoparticles for the Treatment of Inflammation-induced Liver Injury.Adv Sci (Weinh). 2016 Sep 2

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Nature:siRNA干预治疗埃博拉病毒感染新进展

埃博拉病毒在西非地区的流行仍未得到有效控制,其造成的病例和死亡比之前的病毒爆发流行都要严重,是一次前所未有的大灾难。近日,著名国际学术期刊nature在线发表了美国科学家关于埃博拉病毒治疗进展的相关研究。   在此研究之前,科学家们已经研发出一些病毒接触后干预手段,对返回欧洲和美国的病人进行治疗。但这些治疗手段对于治疗埃博拉病毒新暴发亚型的体内疗效仍未可知。   在该项

Nat Med: CKIP-1基因小核酸干扰治疗能逆转骨质疏松

最近,军事医学科学院的一项动物实验证实,一种能够特异性携带任何具有成骨潜能的小核酸到达骨形成部位的靶向递送系统,能够高效而安全地促进携带的成骨小核酸逆转骨质疏松,为骨质疏松治疗的应用基础研究与核酸药物研发提供了坚实基础。   1月30日,最新出版的国际著名学术期刊《自然-医学》杂志在线发表了香港中文大学矫形外科及创伤学系张戈教授团队、军事医学科学院蛋白质组学国家重点实验室张令强研究员团队、中国

Cancer Research:携带siRNA纳米颗粒抑制三阴性乳腺癌转移

来自美国的华人科学家Zheng-Rong Lu在国际学术期刊cancer research发表了一篇文章,他们针对β3整合素设计了siRNA并通过纳米颗粒进行体内转运能够显著抑制三阴性乳腺癌的生长,转移和复发,具有重要应用前景。   转移性乳腺癌是癌症导致女性死亡的第二大杀手,而三阴性乳腺癌是乳腺癌中具有高度侵袭性的一个亚型,到目前为止,仍缺少了解比较清楚的分子靶向目标以制定有效

JCI:siRNA筛选发现促乳腺癌转移关键因子

近日,著名国际期刊JCI在线发表了荷兰莱顿大学研究人员的一项最新研究成果,他们利用小干扰RNA对H1299细胞内与细胞迁移有关的基因进行了筛选,发现了一些与肿瘤细胞迁移速度和持续性有关的基因,并发现了与乳腺癌病人肿瘤转移密切相关的SRPK1基因或可成为乳腺癌药物治疗的潜在靶点,因此具有重要意义。   肿瘤细胞迁移是癌细胞扩散的一个重要过程,而这一过程主要通过信号介导的细胞骨架和细