申请人:BARYZA Jeremy Lee
公开号:US20160244756A1
公开(公告)日:2016-08-25
The disclosure relates to compositions comprising a RNAi agent having a novel format including a spacer subunit. The disclosure relates to compositions comprising a RNAi agent having a novel format: an 18-mer format with at least one internal spacer. These RNAi agents comprise a first and a second 18-mer strand, wherein the first strand is 18 ribonucleotides or 18 total ribonucleotides and spacer subunit(s), and the second strand is 18 total ribonucleotides and spacer subunit(s), wherein: each spacer subunit consists of: (a) a phosphate or modified internucleoside linker and (b) a spacer; a spacer subunit can be at any position in the strand; the two strands form a duplex with at least one blunt end; and the 3 end of one or both strands terminates in a phosphate or modified internucleoside linker and further comprises, in 5 to 3 order: a second spacer; a second phosphate or modified internucleoside linker, and a 3 end cap. In various embodiments, the RNAi agents comprise a first and a second strand, wherein each strand is a 30-mer or shorter, the first strand comprises ribonucleotides, and the second strand comprises ribonucleotides and one or more spacer subunit(s), wherein: each spacer subunit consists of: (a) a phosphate or modified internucleoside linker and (b) a spacer; a spacer subunit can be at any position in the strand. In some embodiments, the 3 end of both strands further comprise, in 5 to 3 order: a second spacer; a second phosphate or modified internucleoside linker; and a 3 end cap. The two strands can have the same or different spacers, phosphates or modified internucleoside linkers, and/or 3 end caps. The strands can be ribonucleotides, or, optionally, one or more nucleotide can be modified or substituted. Optionally, at least one nucleotide comprises a modified internucleoside linker. Optionally, the first two base-pairing nucleotides on the 3 end of the one or both strand are 2-MOE. Optionally, the RNAi agent can be modified on one or both 5 end. Optionally, the first or second strand is the sense strand, and the sense strand can comprise a 5 end cap which reduces the amount of the RNA interference mediated by this strand. Optionally, the RNAi agent is attached to a ligand. This format can be used to devise RNAi agents to a variety of different targets and sequences. The disclosure also relates to processes for making such compositions, and methods and uses of such compositions, e.g., to mediate RNA interference.
本公开涉及包含具有新型格式的RNAi药剂的组合物,其中包括一个间隔亚基。本公开涉及包括具有新型格式的RNAi药剂的组合物:具有至少一个内部间隔的18-mer格式。这些RNAi药剂包括第一和第二个18-mer链,其中第一链是18个核苷酸或18个总核苷酸和间隔亚基,第二链是18个总核苷酸和间隔亚基,其中:每个间隔亚基由(a)磷酸酯或修饰的核苷酸间连体和(b)间隔组成;间隔亚基可以在链的任何位置;两个链形成至少一个钝端的双链;并且一个或两个链的3'端以磷酸酯或修饰的核苷酸间连体终止,并进一步包括,以5到3的顺序:第二个间隔;第二个磷酸酯或修饰的核苷酸间连体,以及3'端帽。在各种实施例中,RNAi药剂包括第一和第二链,其中每个链是30-mer或更短,第一链包括核苷酸,第二链包括核苷酸和一个或多个间隔亚基,其中:每个间隔亚基由(a)磷酸酯或修饰的核苷酸间连体和(b)间隔组成;间隔亚基可以在链的任何位置。在某些实施例中,两个链的3'端进一步包括,以5到3的顺序:第二个间隔;第二个磷酸酯或修饰的核苷酸间连体;和3'端帽。两个链可以具有相同或不同的间隔、磷酸酯或修饰的核苷酸间连体和/或3'端帽。链可以是核苷酸,或者可选地,一个或多个核苷酸可以被修饰或替换。可选地,至少一个核苷酸包含修饰的核苷酸间连体。可选地,一个或两个链的3'端的前两个配对核苷酸是2-MOE。可选地,RNAi药剂可以在一个或两个5'端上被修饰。可选地,第一或第二链是正义链,正义链可以包括减少由该链介导的RNA干扰的5'端帽。可选地,RNAi药剂附着在配体上。此格式可用于设计针对各种不同靶标和序列的RNAi药剂。本公开还涉及制备这种组合物的过程,以及这种组合物的方法和用途,例如介导RNA干扰。