Lymphocyte depletion in huCD52 transgenic mice and cynomolgus monkeys
“The primary pharmacodynamic effect evaluated in the in vivo pharmacology studies was lymphocyte cell depletion. The studies were conducted in the human CD52 (huCD52) transgenic mouse model and in the cynomolgus monkey.”
No MS animal model studies: clinical MS efficacy data already existed when huCD52 mice were developed
“Efficacy studies in animal models of MS were not conducted with alemtuzumab, because clinical efficacy data were already available from clinical experience with alemtuzumab for MS at the time huCD52 transgenic mice were developed and characterised.”
CHMP: lack of EAE proof-of-concept studies acceptable given existing clinical MS experience
“No proof-of-concept studies in this model were conducted by the applicant. However, as clinical experience with alemtuzumab in the treatment of MS was already available at the time huCD52 transgenic mice were developed and characterised, the lack of these studies was considered acceptable by the CHMP.”