Nusinersen

Nusinersen, marketed as Spinraza, is a medication used in treating spinal muscular atrophy (SMA), a rare neuromuscular disorder. In December 2016, it became the first approved drug used in treating this disorder.

Nusinersen
Clinical data
Trade namesSpinraza
Other namesIONIS-SMNRx, ISIS-SMNRx
AHFS/Drugs.comMonograph
MedlinePlusa617010
License data
Pregnancy
category
  • AU: B1
Routes of
administration
Intrathecal
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • UK: POM (Prescription only)
  • US: ℞-only
  • EU: Rx-only
Pharmacokinetic data
Bioavailability100% (intrathecal)
Protein binding<25% (in CSF), >94% (in plasma)
MetabolismExonuclease (3'- and 5')-mediated hydrolysis
Elimination half-life135–177 days (in CSF), 63–87 days (in plasma)
Identifiers
  • all-P-ambo-2'-O-(2-Methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiocytidylyl-(3'→5')-2'-O-(2-methoxyethyl)-P-thioadenylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiocytidylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiocytidylyl-(3'→5')-2'-O-(2-methoxyethyl)-P-thioadenylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-P-thioadenylyl-(3'→5')-2'-O-(2-methoxyethyl)-P-thioadenylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-P-thioguanylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiocytidylyl-(3'→5')-2'-O-(2-methoxyethyl)-5-methyl-P-thiouridylyl-(3'→5')-2'-O-(2-methoxyethyl)-P-thioguanylyl-(3'→5')-2'-O-(2-methoxyethyl)guanosine
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
Chemical and physical data
FormulaC234H323N61Na17O128P17S17
Molar mass7500.86 g·mol−1
  • Cc1cn(c(=O)[nH]c1=O)[C@H]2[C@@H]([C@@H]([C@H](O2)CO)OP(=S)(O)OC[C@@H]3[C@H]([C@H]([C@@H](O3)n4cc(c(nc4=O)N)C)OCCOC)OP(=S)(O)OC[C@@H]5[C@H]([C@H]([C@@H](O5)n6cnc7c6ncnc7N)OCCOC)OP(=S)(O)OC[C@@H]8[C@H]([C@H]([C@@H](O8)n9cc(c(nc9=O)N)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(=O)[nH]c1=O)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(=O)[nH]c1=O)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(=O)[nH]c1=O)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(nc1=O)N)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cnc2c1ncnc2N)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(=O)[nH]c1=O)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cnc2c1ncnc2N)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cnc2c1ncnc2N)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(=O)[nH]c1=O)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cnc2c1nc([nH]c2=O)N)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(nc1=O)N)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cc(c(=O)[nH]c1=O)C)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cnc2c1nc([nH]c2=O)N)OCCOC)OP(=S)(O)OC[C@@H]1[C@H]([C@H]([C@@H](O1)n1cnc2c1nc([nH]c2=O)N)OCCOC)O)OCCOC

Since the condition it treats is so rare, Nusinersen has so-called "orphan drug" designation in the United States and the European Union.

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