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Final Phase I Data Show Preventive TNBC Vaccine Is Safe and Induces Immune Responses in Most Participants

Researchers will use the findings to design a Phase II efficacy trial planned for late 2026.

Overview

  • Presented at the San Antonio Breast Cancer Symposium, the study reported a 74% immune-response rate with an acceptable safety profile.
  • The single-center trial at Cleveland Clinic enrolled 35 participants across three high-risk cohorts (26 in Phase 1a, 4 in 1b, 5 in 1c).
  • Investigators established the maximum tolerated dose, with mostly mild injection-site inflammation and a few Grade 3 ulcerations at higher doses that guided dosing decisions.
  • The vaccine targets α-lactalbumin, a lactation protein absent after breastfeeding in normal tissue but expressed in most triple-negative breast cancers, to prime cellular and humoral immunity.
  • Funded by the U.S. Department of Defense and licensed exclusively to Anixa, the program now advances toward a Phase II study expected to run two to three years.