Comparison of partially and fully chemically-modified siRNA in conjugate-mediated delivery in vivo.

Comparison of partially and fully chemically-modified siRNA in conjugate-mediated delivery in vivo.
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DOI:
10.1093/nar/gky037
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发表时间:
2018-03-16
影响因子:
14.9
通讯作者:
Khvorova A
Khvorova A
中科院分区:
生物学2区
文献类型:
--
作者:
Hassler MR;Turanov AA;Alterman JF;Haraszti RA;Coles AH;Osborn MF;Echeverria D;Nikan M;Salomon WE;Roux L;Godinho BMDC;Davis SM;Morrissey DV;Zamore PD;Karumanchi SA;Moore MJ;Aronin N;Khvorova A

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小干扰RNA(siRNA)为基础的药物需要化学修饰或配方,以促进稳定性,最大限度地减少先天免疫,并能够交付给目标组织。部分修饰的siRNA(高达70%的核苷酸)在体外提供显著的稳定性并且是可商购的;因此通常用于评估生物缀合物用于体内递送的功效。相比之下,使用缀合作为递送策略的大多数临床上先进的非配制化合物是完全化学修饰的(100%的核苷酸)。在这里,我们比较了部分和完全化学修饰的siRNA在缀合物介导的递送。我们表明,完全修饰的siRNA在各种组织中以100倍以上的水平保留,与缀合物或siRNA序列的性质无关,并支持生产性mRNA沉默。因此,完全化学稳定的siRNA可以提供更好的平台来鉴定用于靶向RNAi递送的新型部分(肽、适体、小分子)。
Small interfering RNA (siRNA)-based drugs require chemical modifications or formulation to promote stability, minimize innate immunity, and enable delivery to target tissues. Partially modified siRNAs (up to 70% of the nucleotides) provide significant stabilization in vitro and are commercially available; thus are commonly used to evaluate efficacy of bio-conjugates for in vivo delivery. In contrast, most clinically-advanced non-formulated compounds, using conjugation as a delivery strategy, are fully chemically modified (100% of nucleotides). Here, we compare partially and fully chemically modified siRNAs in conjugate mediated delivery. We show that fully modified siRNAs are retained at 100x greater levels in various tissues, independently of the nature of the conjugate or siRNA sequence, and support productive mRNA silencing. Thus, fully chemically stabilized siRNAs may provide a better platform to identify novel moieties (peptides, aptamers, small molecules) for targeted RNAi delivery.
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