Fomivirsen sodium  (Synonyms: ISIS-2922 sodium)

Fomivirsen (ISIS-2922) sodium is an antisense 21 mer phosphorothioate oligonucleotide. Fomivirsen sodium is an antiviral agent that is used cytomegalovirus retinitis (CMV) research, incluiding in AIDs. Fomivirsen sodium binds to and degrades the mRNAs encoding CMV immediate-early 2 protein, thus inhibiting virus proliferation^[1][2].

Antisense oligonucleotide acts a complementary nucleotide to the messenger RNA of the major immediate-early region proteins of human cytomegalovirus, it disrupts the replication of the virus through an antisense mechanism^[1].
Fomivirsen is 21-mer phosphorothioate ASO with CpG motif near its 5′ end, with the sequence 5′-GCG TTT GCT CTT CTT CTT GCG-3′, resulting in mRNA degradation by RNase H-mediated mechanism^[2].
Fomivirsen inhibits CMV replication in human retinal pigment epithelial (RPE) cells and in human fibroblast cells (MRC-5 cells) in a dose-dependent manner. The mean IC₅₀ are 0.03 μM for RPE cells and 0.2 μM for MRC5 cells^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

6682.4 (free acid)

160369-77-7

Solid

White to off-white

DNA, d(P-thio)(G-C-G-T-T-T-G-C-T-C-T-T-C-T-T-C-T-T-G-C-G), eicosasodium salt

[Fomivirsen (sodium)]

Room temperature in continental US; may vary elsewhere.

-20°C, stored under nitrogen

*In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen)

• [1]. M D de Smet, et al. Fomivirsen- a phosphorothioate oligonucleotide for the treatment of CMV retinitis. Ocul Immunol Inflamm. 1999 Dec;7(3-4):189-98.  [Content Brief]

  [2]. Anna Kilanowska, et al. In vivo and in vitro studies of antisense oligonucleotides – a review. (Review Article) RSC Adv., 2020, 10, 34501-34516  [Content Brief]