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Which nonclinical studies did approved multispecifics skip?

From the FDA and EMA reviews of all 18 approved multispecifics. Each answer links to the regulator's own sentence.

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Short answer
18 of 18 skipped carcinogenicity; 18 of 18 skipped genotoxicity.
No genotoxicity studies18/18
No carcinogenicity study18/18
No dedicated repro tox14/18

Precedent by precedent

18 approved multispecifics, with the reviewers' own words.

Bizengri

zenocutuzumab · HER2 x HER3
Genotoxicity
Not conducted (ICH S6(R1))
“Standard genotoxicity studies are not considered appropriate for this class of biological product, in line with the ICH S6 (R1) guideline.”
✓ VerifiedFDA multi-discipline review, p. 85Source ↗
Carcinogenicity
Not conducted (ICH S6(R1), ICH S9)
“Carcinogenicity studies have not been performed with MCLA-128 as they are not considered appropriate for this class of biological product, in line with the ICH S6 (R1) and ICH S9 guidelines.”
✓ VerifiedFDA multi-discipline review, p. 85Source ↗
Instead of carcinogenicity
Not stated in public reviews

Blincyto

blinatumomab · CD19 x CD3
Genotoxicity
Not conducted (ICH S6(R1); protein of natural amino acids)
“In vitro and in vivo genotoxicity studies were not performed in accordance with ICH S6 (R1).”
✓ VerifiedEMA assessment report, p. 31Source ↗
Carcinogenicity
Not conducted (ICH S9, advanced cancer indication)
“As it is being developed for advanced cancer indications, no carcinogenicity studies have been conducted, in accordance with ICH S9.”
✓ VerifiedEMA assessment report, p. 31Source ↗
Instead of carcinogenicity
Not stated in public reviews

Columvi

glofitamab · CD20 x CD3
Genotoxicity
Not conducted (ICH S6(R1))
“genotoxicity studies have not been conducted with glofitamab. It is not expected that glofitamab would interact directly with DNA or other chromosomal material.”
✓ VerifiedFDA multi-discipline review, p. 66Source ↗
Carcinogenicity
Not conducted (ICH S9, advanced cancer)
“Carcinogenicity studies with glofitamab have not been conducted and are not planned. Glofitamab is intended for the treatment of patients with advanced cancer.”
✓ VerifiedFDA multi-discipline review, p. 66Source ↗
Instead of carcinogenicity
Not stated in public reviews

Elrexfio

elranatamab · BCMA x CD3
Genotoxicity
Not conducted (ICH S6(R1))
“Genotoxicity studies with elranatamab have not been conducted since they are generally not required for protein-based biotherapeutics per ICH S6(R1).”
✓ VerifiedEMA assessment report, p. 43Source ↗
Carcinogenicity
Not conducted (ICH S9 / S6(R1))
“Carcinogenicity studies with elranatamab have not been conducted since they are generally not required for advanced cancer and protein-based biotherapeutics per ICH S9 and ICH S6(R1), respectively.”
✓ VerifiedEMA assessment report, p. 43Source ↗
Instead of carcinogenicity
Not stated in public reviews

Epkinly

epcoritamab · CD20 x CD3
Genotoxicity
Not conducted (ICH S6(R1), ICH S9)
“Genotoxicity studies were not conducted for epcoritamab per ICHS6(R1) and ICH S9 guidance.”
✓ VerifiedFDA multi-discipline review, p. 57Source ↗
Carcinogenicity
Not conducted (ICH S6(R1), S1A, S9)
“Carcinogenicity studies were not conducted for epcoritamab per ICHS6(R1), ICH S1A, and ICH S9 guidance.”
✓ VerifiedFDA multi-discipline review, p. 57Source ↗
Instead of carcinogenicity
Not stated in public reviews

Hemlibra

emicizumab · FIXa x FX
Genotoxicity
Not conducted (ICH S6)
“Genotoxicity studies were not conducted as these types of studies are not applicable to biotechnology-derived pharmaceuticals (per ICH S6).”
✓ VerifiedFDA multi-discipline review, p. 41Source ↗
Carcinogenicity
Not conducted (no pharmacologically relevant rodent; waived with ECAC concurrence)
“Carcinogenicity studies were not conducted due to lack of a pharmacologically relevant rodent species.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Instead of carcinogenicity
Not stated in public reviews

Imdelltra

tarlatamab · DLL3 x CD3
Genotoxicity
Not conducted (ICH S6(R1))
“Therefore, no genotoxicity studies have been conducted or are planned, consistent with ICH Harmonised Tripartite Guideline S6”
✓ VerifiedFDA multi-discipline review, p. 73Source ↗
Carcinogenicity
Not conducted (ICH S9)
“No carcinogenicity studies have been conducted nor are any planned in accordance with ICH S9 (ICH, 2010).”
✓ VerifiedFDA multi-discipline review, p. 73Source ↗
Instead of carcinogenicity
Not stated in public reviews

Kimmtrak

tebentafusp · CD3 x gp100 (TCR fusion)
Genotoxicity
Not conducted (fusion protein; ICH S6/S9)
“Based on the biologic properties of tebentafusp, a fusion protein, genetic toxicology studies are not warranted.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
Carcinogenicity
Not conducted (advanced cancer indication)
“Carcinogenicity studies were not warranted for the proposed indication.”
✓ VerifiedFDA multi-discipline review, p. 46Source ↗
Instead of carcinogenicity
Not stated in public reviews

Korjuny

catumaxomab · EpCAM x CD3
Genotoxicity
Not conducted (ICH S6(R1))
“Genotoxicity studies have not been performed according to ICH S6(R1).”
✓ VerifiedEMA assessment report, p. 38Source ↗
Carcinogenicity
Not conducted (ICH S6); no proliferation of EpCAM+ or CD3+ cells in vitro
“Standard carcinogenicity studies are generally inappropriate for biotechnology-derived pharmaceuticals according to ICH S6.”
✓ VerifiedEMA assessment report, p. 38Source ↗
Instead of carcinogenicity
Not stated in public reviews

Lunsumio

mosunetuzumab · CD20 x CD3
Genotoxicity
Not conducted (ICH S6(R1))
“In accordance with the current ICH guidance (ICH S6(R1) 2011), genotoxicity studies have not been conducted with mosunetuzumab because the potential of biotechnology products, in particular high molecular weight monoclonal antibodies, to elicit DNA damage in somatic or germ cells via electrophilic reactions is unlikely.”
✓ VerifiedFDA multi-discipline review, p. 58Source ↗
Carcinogenicity
Not conducted (ICH S6R1, oncology indication)
“No carcinogenicity studies have been conducted with mosunetuzumab and are not planned for the intended oncology indication, as per Guidance for Industry S6R1.”
✓ VerifiedFDA multi-discipline review, p. 59Source ↗
Instead of carcinogenicity
Not stated in public reviews

Lynozyfic

linvoseltamab · BCMA x CD3
Genotoxicity
Not conducted (antibody not expected to interact with DNA)
“No genotoxicity studies were conducted with linvoseltamab as antibodies are not expected to interact directly with DNA or other chromosomal material.”
✓ VerifiedEMA assessment report, p. 33Source ↗
Carcinogenicity
Not conducted (ICH S9, advanced malignancy)
“As linvoseltamab is intended for use in patients with advanced malignancies, carcinogenicity studies were not conducted with linvoseltamab, consistent with ICH S9 guideline Nonclinical Evaluation of Anticancer Pharmaceuticals.”
✓ VerifiedEMA assessment report, p. 33Source ↗
Instead of carcinogenicity
Not stated in public reviews

Ordspono

odronextamab · CD20 x CD3
Genotoxicity
Not conducted (antibody not expected to interact with DNA)
“Antibodies, such as odronextamab, are not expected to interact directly with DNA or other chromosomal material. Therefore, no genotoxicity studies were conducted with odronextamab.”
✓ VerifiedEMA assessment report, p. 35Source ↗
Carcinogenicity
Not conducted (ICH S9, advanced malignancy)
“As odronextamab is intended for use in patients with advanced malignancies, carcinogenicity studies were not conducted with odronextamab”
✓ VerifiedEMA assessment report, p. 35Source ↗
Instead of carcinogenicity
Not stated in public reviews

Removab

catumaxomab · EpCAM x CD3
Genotoxicity
Not conducted (not submitted; biologic, no relevant model)
“Genotoxicity studies have not been submitted.”
✓ VerifiedEMA assessment report, p. 14Source ↗
Carcinogenicity
Not conducted (not submitted)
“Carcinogenicity studies have not been submitted.”
✓ VerifiedEMA assessment report, p. 14Source ↗
Instead of carcinogenicity
Not stated in public reviews

Rybrevant

amivantamab · EGFR x MET
Genotoxicity
Not conducted (not appropriate for antibodies)
“Janssen did not conduct genetic toxicology studies as they are not appropriate for antibody therapies.”
✓ VerifiedFDA multi-discipline review, p. 37Source ↗
Carcinogenicity
Not conducted (advanced cancer, ICH S9)
“In addition, Janssen did not conduct dedicated studies to assess fertility or carcinogenicity as these studies are not necessary to support the development of a drug intended to treat patients with advanced cancer.”
✓ VerifiedFDA multi-discipline review, p. 37Source ↗
Instead of carcinogenicity
Not stated in public reviews

Talvey

talquetamab · GPRC5D x CD3
Genotoxicity
Not conducted (ICH S6; biotechnology-derived product)
“Genotoxicity studies routinely conducted for pharmaceuticals have not been conducted and are not applicable to biotechnology-derived pharmaceuticals such as talquetamab per ICH S6.”
✓ VerifiedFDA multi-discipline review, p. 57Source ↗
Carcinogenicity
Not conducted (ICH S9; advanced cancer)
“As indicated in the ICH S9 guidance, carcinogenicity studies are not warranted to support marketing for therapeutics intended to treat patients with advanced cancer.”
✓ VerifiedFDA multi-discipline review, p. 57Source ↗
Instead of carcinogenicity
Not stated in public reviews

Tecvayli

teclistamab · BCMA x CD3
Genotoxicity
Not conducted (ICH S6(R1))
“Genotoxicity studies were not conducted with teclistamab.”
✓ VerifiedFDA multi-discipline review, p. 46Source ↗
Carcinogenicity
Not conducted (ICH S9, advanced cancer)
“Carcinogenicity studies were not conducted with teclistamab.”
✓ VerifiedFDA multi-discipline review, p. 46Source ↗
Instead of carcinogenicity
Not stated in public reviews

Vabysmo

faricimab · VEGF-A x Ang-2
Genotoxicity
Not conducted (ICH S6(R1))
“In accordance with ICH S6(R1) guidance, standard genotoxicity studies were not conducted with faricimab.”
✓ VerifiedFDA pharmacology/toxicology review, p. 37Source ↗
Carcinogenicity
Not conducted (no rodent VEGF-A binding); weight-of-evidence carcinogenicity assessment document
“No standard rodent carcinogenicity studies have been conducted as faricimab showed no relevant binding to mouse or rat VEGF-A.”
✓ VerifiedFDA pharmacology/toxicology review, p. 37Source ↗
Instead of carcinogenicity
Not stated in public reviews

Ziihera

zanidatamab · HER2 x HER2 (biparatopic)
Genotoxicity
Not conducted (ICH S6(R1), ICH S9)
“Thus, mutagenicity studies are considered inappropriate and were not conducted.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
Carcinogenicity
Not conducted (ICH S9; advanced cancer, no mechanistic concern)
“Thus, given the intended patient population and lack of mechanistic concern, carcinogenicity studies are not planned with zanidatamab (ICH S9)”
✓ VerifiedFDA multi-discipline review, p. 46Source ↗
Instead of carcinogenicity
Not stated in public reviews