Sanofi Bets Big On IO With Synthorx Buy

Expects Interleukin-2 To Be Foundation Of Future IO-IO Combos

The French drugmaker is paying $2.5bn to get hold of THOR-707 which it claims has the potential to become the best-in-class IL-2 therapeutic for solid tumors, thanks to improved pharmacology and less frequent dosing.

French flag
France's Sanofi building oncology franchise • Source: Shutterstock

With the acquisition of US biotech Synthorx Inc. for $2.5bn, Sanofi's new CEO Paul Hudson has confirmed immuno-oncology (IO) as a key focus for the French drugmaker.

Sanofi will pay $68 a share in cash for Synthorx, which represents a 172% premium on its closing price on...

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