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Elrexfio: how long were the pivotal tox studies?

elranatamab · BCMA x CD3
Longest pivotal study
13 weeks
“In the 3-month repeat-dose SC toxicity study, elranatamab doses of 0.3, 3, and 6 mg/kg/week (total of 14 doses) showed adverse clinical signs that correlated with decreased body weight and food consumption and contributed to mortality.”
✓ VerifiedFDA multi-discipline review, p. 48Source ↗
Pivotal GLP studies
GLP cynomolgus: 1-month IV (0.01-0.3 mg/kg/wk), 1-month SC (0.3 mg/kg/wk), 3-month SC (0.3, 3, 6 mg/kg/wk); no recovery
“Recovery was not assessed in any of the general toxicology studies.”
✓ VerifiedFDA multi-discipline review, p. 48Source ↗
Route in tox
IV and SC (SC is clinical route, used for longest study)
“Intravenous administration was originally assessed before subcutaneous administration was chosen as the clinical route.”
✓ VerifiedFDA multi-discipline review, p. 56Source ↗

Same question, other bispecifics

Bizengri

zenocutuzumab · HER2 x HER3
13 weeks

Blincyto

blinatumomab · CD19 x CD3
13 weeks

Columvi

glofitamab · CD20 x CD3
4 weeks

Epkinly

epcoritamab · CD20 x CD3
5 weeks

Kimmtrak

tebentafusp · CD3 x gp100 (TCR fusion)
0 (no in vivo tox study)

Korjuny

catumaxomab · EpCAM x CD3
0 (no in vivo tox study)

Lunsumio

mosunetuzumab · CD20 x CD3
26 weeks

Ordspono

odronextamab · CD20 x CD3
16 weeks

Removab

catumaxomab · EpCAM x CD3
0 (no in vivo tox study)

Talvey

talquetamab · GPRC5D x CD3
4 weeks

Tecvayli

teclistamab · BCMA x CD3
5 weeks

Vabysmo

faricimab · VEGF-A x Ang-2
26 weeks

Ziihera

zanidatamab · HER2 x HER2 (biparatopic)
13 weeks

Summary across all 18 bispecifics →