TYK’s EGFR Inhibitor Bests Tagrisso In NSCLC Brain Metastases

Top-Line iORR Findings Released

Chinese biotech TYK Medicines says its EGFR inhibitor outperformed AstraZeneca’s same-class blockbuster Tagrisso in a pivotal Phase II trial for first-line use in brain metastases resulting from EGFR mutation-positive non-small cell lung cancer.

TYK Medicines is developing a novel EGFR inibitor for certain non-small cell lung cancer patients with brain metastases. (Shutterstock)

Hong Kong-listed TYK Medicines has claimed TY-9591, its third-generation EGFR inhibitor, outperformed AstraZeneca’s same-class blockbuster Tagrisso (osimertinib) in the first-line treatment of brain metastases from non-small cell lung cancer (NSCLC) with EGFR mutations.

Key Takeaways
  • Investigator data from a head-to-head, pivotal Chinese Phase II trial show a “notable” improvement for TYK's TY-9591 as monotherapy over osimertinib, with both “statistical and clinical significance” in intracranial objective response rate in the first-line treatment of EGFR-mutated (exon 19 deletion and exon 21 L858R mutation) NSCLC with brain metastases.
  • TYK has not yet disclosed if intracranial progression free survival, the trial's other primary endpoint, shows similar benefits over osimertinib

Investigator data from a head-to-head pivotal Phase II trial in Chinese patients show a “notable” improvement for TY-9591 over osimertinib as front-line monotherapy, with both “statistical and clinical significance” in intracranial objective response rate (iORR) in EGFR-mutated

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