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Biologics

Pfizer to buy immunotherapy company Trillium

by Megha Satyanarayana
August 30, 2021 | A version of this story appeared in Volume 99, Issue 31
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An illustration of a cancer cell and an immune cell.
Credit: Trillium Therapeutics
Pfizer has agreed to buy Trillium Therapeutics and its cancer checkpoint inhibitors, which recognize CD47 on a cancer cell (pink), encouraging immune cells (blue) to attack tumors.

Pfizer has agreed to buy Trillium Therapeutics in a stock deal worth $2.3 billion. Trillium is an immuno-oncology company with two lead proteins in clinical trials that could serve as checkpoint inhibitors. In 2020, Pfizer invested $25 million in Trillium through its Breakthrough Growth Initiative.

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