News summary

Results from Phase III Study of Trastuzumab Botidotin versus T-DM1 in HER2-Positive Breast Cancer Published in JCO

Source: PR Newswire • Published: 14 Sept 2026, 06:18

Summarized by Masters of Longevity from PR Newswire.

Phase III trial results show a domestically developed HER2-targeting antibody–drug conjugate improved progression-free survival and response versus an established comparator in advanced HER2-positive breast cancer.

Results from Phase III Study of Trastuzumab Botidotin versus T-DM1 in HER2-Positive Breast Cancer Published in JCO
Key Takeaways
  • Median progression-free survival was 11.1 months with the new ADC versus 4.4 months with the comparator, hazard ratio 0.39.
  • Objective response rate was 76.9% for the new ADC versus 53.0% for the comparator, with longer median duration of response.
  • Safety profile showed lower hematologic, hepatic, and gastrointestinal toxicities and fewer serious adverse events with the new ADC.
Read the full article at PR Newswire

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