Athymic nude mice only (immunodeficient wound model)
“The following toxicology study was conducted to evaluate the safety profile of STRATAGRAFT® following administration in an athymic (immunodeficient) murine wound model:”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Why that species
Human cells would elicit xenogeneic response in immunocompetent animals; nude mice have reduced T-cell response
“STRATAGRAFT® is composed of human cells, thus the potential for elicitation of a xenogeneic response following administration in immune competent animals exists.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Surrogate molecule
No surrogate; clinical human-cell construct applied to nude mice
“Strain/Breed nude mice”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Species: general tox
Athymic (immunodeficient) mouse wound model
“The following toxicology study was conducted to evaluate the safety profile of STRATAGRAFT® following administration in an athymic (immunodeficient) murine wound model:”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Species: DART
Not conducted; acceptable given product characteristics and safety profile
“No animal reproductive or developmental toxicity (DART) studies were conducted with STRATAGRAFT, which is acceptable, considering the product characteristics and safety profile.”
✓ VerifiedFDA summary basis for approval, p. 12Source ↗
Species: carcinogenicity
No carcinogenicity study; tumorigenicity in immunodeficient mice (topical construct 20 weeks; s.c. NIKS keratinocytes 23 weeks)
“No tumor formation was observed for the 20-week study duration. In addition, following a single subcutaneous injection of NIKS® keratinocytes in immunodeficient mice, no tumor formation was detected for the 23-week study duration.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Surrogate used in
No surrogate used; human-cell construct tested in nude mice to avoid xenogeneic response
“STRATAGRAFT® is composed of human cells, thus the potential for elicitation of a xenogeneic response following administration in immune competent animals exists.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗