After deals and acquisitions with Spark Therapeutics and Bamboo, Pfizer is once again looking to bolster its rare and gene therapy pipeline as it outlines a new drug pact with Sangamo.

Sangamo gets $70 million upfront and could gain $475 million in biobucks and sales royalties on any medications from the collaboration that gain approval.

SB-525 works as a AAV vector carrying a Factor VIII gene construct driven by a synthetic, liver-specific promoter. The FDA has already cleared the start of human trials for SB-525, and given it an orphan drug tag.

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