Date of this Version
Patent No.: US 7,888,321 B2
A non-human transgenic mammalian animal, as described above, contains an exogenous double stranded DNA sequence stably integrated into the genome of the animal, which comprises cis-acting regulatory units operably linked to a DNA sequence encoding human FIX protein without the benefit of the presence of a complete milk gene sequence for gene rescue, and a signal sequence is active in directing newly expressed Factor IX into the milk of the animal at levels in an unactivated form that is suitable for Subsequent processing for therapeutic applications in treating Hemophilia B. The transgenic mammals are preferably pigs, cows, sheep, goats and rabbits. The applications include milk derivatives for oral delivery and oral tolerization in the treatment of Hemophilia B.