Literature only: animal analog fibroblasts in immunocompetent animals and human fibroblasts in immunodeficient mice; product not tested
“The fibroblasts were administered to immune competent animals (animal analog cells) and to immunodeficient mice (human cells).”
✓ VerifiedFDA pharmacology/toxicology review, p. 26Source ↗
Why that model
No suitable animal model for rhytids; prior commercial human experience
“The BLA states that due to this previous commercial experience in humans, and due to the lack of a ‘suitable’ preclinical animal model for rhytids, no preclinical studies using IT were performed.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Reviewer's view of the efficacy data
Limited relevance: published studies used cell isolation, culture and formulation different from the product
“The cell isolation procedure, culture condition, passage number, and formulation for each experiment described in the various publications were different from what is used for IT.”
✓ VerifiedFDA pharmacology/toxicology review, p. 26Source ↗
autologous cultured chondrocytes on porcine collagen membrane · Autologous chondrocytes
Analogous MACI (animal cells on same membrane) in critical-sized knee/stifle cartilage defects in rabbits and horses: improved repair vs membrane alone or empty defect