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Viltepso: which tox species, and why?

viltolarsen · DMD exon 53 (PMO)
Species
Male CD-1 mouse and male cynomolgus monkey (plus juvenile male mouse)
“Repeat-dose studies in adult male CD1 mice, and single and repeat-dose studies in adult male cynomolgus monkeys were conducted to evaluate the general toxicology of vitolarsen.”
✓ VerifiedFDA pharmacology/toxicology review, p. 47Source ↗
Why that species
Exon 53 skipping shown in monkey; not pharmacologically active in rodents (mouse used for general/juvenile tox)
“In vivo assessment of exon 53 skipping was included in the 12- and 39-week toxicity studies in monkey; viltolarsen is not pharmacologically active in rodents.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Surrogate molecule
No surrogate in tox; mouse-specific PMO (NDK-73) used only for mdx52 proof-of-concept
“In male mdx52 mice, IV administration of a mouse surrogate (NDK-73) as well as an additional morpholine oligonucleotide (NDK-33), which targets the Exon 53 3’ end of the mouse dystrophin gene”
✓ VerifiedFDA pharmacology/toxicology review, p. 46Source ↗

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

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

Zanvastro

zilganersen · GFAP (ASO)
Mouse (SC and ICV, juvenile) and juvenile monkey (intrathecal); mouse surrogate ASO arm

Summary across all 24 oligonucleotides →