1244969-84-3Relevant articles and documents
Synthesis and antisense properties of 2′-O-(2S-methoxypropyl)-RNA- modified gapmer antisense oligonucleotides
Yu, Jinghua,Pandey, Sanjay K.,Khatri, Hetal,Prakash, Thazha P.,Swayze, Eric E.,Seth, Punit P.
supporting information, p. 2040 - 2044 (2014/11/07)
To ascertain whether increasing hydrophobicity can enhance the activity of second-generation antisense oligonucleotides (ASOs) in muscle, we investigated the antisense properties of 2′-O-(2S-methoxypropyl)-RNA (2S-MOP)-modified ASOs. Synthesis of the 2S-MOP 5-methyl uridine phosphoramidite was accomplished on a multi-gram scale by Lewis-acid-catalyzed ring opening of 5′-O-tert-butyldiphenylsilyl ether-protected 2,2′-anhydro-5-methyl uridine with 2S-methoxy-1-propanol. Synthesis of the 2S-MOP 5-methyl cytidine nucleoside from the corresponding 5-methyl uridine nucleoside was accomplished by formation and displacement of a 4-triazolide intermediate with aqueous ammonia. 2S-MOP-modified oligonucleotides were prepared on an automated DNA synthesizer and showed similar enhancements in duplex thermal stability as 2′-O-methoxyethyl RNA (MOE)-modified oligonucleotides. 2S-MOP-containing antisense oligonucleotides were evaluated in Balb-c mice and showed good activity for decreasing the expression levels of scavenger receptor B1 (Srb1) and phosphatase and tensin homologue (PTEN) mRNA in liver and muscle tissue.
