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Zanvastro: which tox species, and why?

zilganersen · GFAP (ASO)
Species
Mouse (SC and ICV, juvenile) and juvenile monkey (intrathecal); mouse surrogate ASO arm
“The nonclinical package submitted to the NDA included general toxicology studies of up to 26 and 39 weeks' duration in mouse (subcutaneous [SC]) and monkey (intrathecal lumbar [ITL]), respectively, as well as a 13-week ICV toxicity study in mouse;”
✓ VerifiedFDA integrated review, p. 74Source ↗
Why that species
Single mismatch to monkey GFAP mRNA gave no knockdown in monkey; mouse surrogate used to probe on-target GFAP reduction
“No meaningful changes in GFAP mRNA levels were observed in brain or spinal cord tissues, likely due to the single mismatch between zilganersen and monkey GFAP mRNA.”
✓ VerifiedFDA integrated review, p. 75Source ↗
Surrogate molecule
Yes: mouse-specific surrogate ASO (ISIS 713812) dosed ICV in parallel juvenile mouse arm
“A parallel group administered the mouse surrogate ASO (ISIS 713812; 0.1 mg ICV) demonstrated locomotor hypoactivity and reductions in bone mineral content in males;”
✓ VerifiedFDA integrated review, p. 75Source ↗

Same question, other oligonucleotides

Amondys 45

casimersen · DMD exon 45 (PMO)
Adult male mouse and cynomolgus monkey; juvenile male rat

Amvuttra

vutrisiran · TTR (siRNA)
Rat and cynomolgus monkey (monkey only pharmacologically active; rat for off-target/class tox); rabbit EFD

Dawnzera

donidalorsen · Prekallikrein / KLKB1 (ASO)
Mouse (CD-1) and cynomolgus monkey

Exondys 51

eteplirsen · DMD exon 51 (PMO)
Cynomolgus monkey and juvenile rat (eteplirsen); mdx/C57BL mouse incl. mouse surrogate

Givlaari

givosiran · ALAS1 (siRNA)
Rat and cynomolgus monkey (both pharmacologically active); rabbit inactive (EFD only)

Izervay

avacincaptad pegol · C5 (aptamer)
Rabbit and dog (IVT ocular studies); rat and cynomolgus monkey (7-day IV); monkey the only pharmacologically relevant species

Kynamro

mipomersen · APOB (ASO)
Mouse, rat and cynomolgus monkey (clinical ASO plus rodent surrogates)

Leqvio

inclisiran · PCSK9 (siRNA)
Rat and cynomolgus monkey (both pharmacologically active); rabbit for EFD

Macugen

pegaptanib · VEGF-165 (aptamer)
Rabbit and dog (pivotal IVT); rat IV for systemic; supportive monkey, mouse

Onpattro

patisiran · TTR (siRNA)
Rat and cynomolgus monkey (monkey pharmacologically active; rat off-target/LNP)

Oxlumo

lumasiran · HAO1 (siRNA)
Rat and cynomolgus monkey (both pharmacologically relevant); rabbit for EFD

Qalsody

tofersen · SOD1 (ASO)
Cynomolgus monkey (IT, relevant species), CD-1 mouse (SC) and rat single-dose IT

Qfitlia

fitusiran · Antithrombin / SERPINC1 (siRNA)
Healthy rat and cynomolgus monkey (GLP); hemophilia A mouse, hemophilia A dog and induced-HA monkey models

Redemplo

plozasiran · APOC3 (siRNA)
Rat (off-target toxicity) and cynomolgus monkey (pharmacologically relevant)

Rivfloza

nedosiran · LDHA (siRNA)
Cynomolgus monkey (relevant) plus mouse (nedosiran inactive; off-target assessment)

Rytelo

imetelstat · Telomerase (oligo)
Mouse and cynomolgus monkey (general tox); mouse and rabbit (EFD)

Spinraza

nusinersen · SMN2 (ASO)
Juvenile cynomolgus monkey (IT) and CD-1 mouse (SC, systemic effects)

Tegsedi

inotersen · TTR (ASO)
Mouse, rat and cynomolgus monkey; monkey the only pharmacologically relevant species

Tryngolza

olezarsen · APOC3 (ASO)
Mouse (with surrogate) and cynomolgus monkey

Viltepso

viltolarsen · DMD exon 53 (PMO)
Male CD-1 mouse and male cynomolgus monkey (plus juvenile male mouse)

Vyondys 53

golodirsen · DMD exon 53 (PMO)
Mouse, cynomolgus monkey (adult males) and juvenile rat

Wainua

eplontersen · TTR (ASO)
Mouse and cynomolgus monkey (monkey the pharmacologically relevant species)

Waylivra

volanesorsen · APOC3 (ASO)
Mouse, rat and cynomolgus monkey (rabbit for embryo-fetal); monkey most relevant

Summary across all 24 oligonucleotides →