Despite achieving co-primary endpoints, G1 Therapeutics scraps PRESERVE 1 trial

13 February 2023
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G1 Therapeutics’ (Nasdaq: GTHX) shares fell 51.8% to $3.43 pre-market today, as the US oncology drug developer said it would terminate a study of its lead drug, trilaciclib, as it was unlikely to be effective in extending survival in patients with a type of colorectal cancer.

The company announced top-line results from its pivotal Phase III PRESERVE 1 trial showing that the trial achieved its co-primary endpoints related to severe neutropenia with statistical significance; however, early anti-tumor efficacy data, including overall response rate (ORR) and preliminary measures of survival, favored the placebo arm.

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