HPV antigen-specific T-cell responses in immunized healthy wild-type C57BL/6 mice; no disease model
“In a second study of healthy wildtype animals (C57BL/6 mice), T cells were isolated on Day 14 and 21 from mice immunized via SC injection with either PRGN-2012, GC46.empty vector, or FFB on Day 0.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Why that model
Not stated in public reviews
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reviewer's view of the efficacy data
Supportive of mechanism: HPV6/11 antigen-specific CD8+ T-cell cytokine and chemokine responses in vivo
“These data provide evidence that PRGN-2012 immunization leads to an HPV6 and HPV11 antigen specific response, CD8+ T cell production of cytokines, and production of effector T cell recruiting chemokines in vivo. These data are supportive of the proposed mechanism of action of PRGN-2012.”
✓ VerifiedFDA pharmacology/toxicology review, p. 11Source ↗
WAS-deficient mice transplanted with WAS LVV-transduced murine Lin- BM cells: increased B cells, platelets, granulocytes; improved T, B and DC function