Trial reportNature communications2026
Disitamab vedotin for HER2-positive breast cancer with liver metastases: phase 3 results from the RC48-C006 phase 2/3 trial.
Trial report in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03500380 (A Randomized, Controlled, Multi-center Phase II Clinical Study to Evaluate the Efficacy and Safety of Recombinant Humanized Anti-HER2 Monoclonal Antibody-MMAE Conjugate for Injection in the Treatment of HER2-positive Locally Advanced or Metastatic Breast Cancer and Phase III Clinical Study to Evaluate the Efficacy and Safety of Recombinant Humanized Anti-HER2 Monoclonal Antibody-MMAE Conjugate for Injection in the Treatment of HER2-positive Advanced Breast With Liver Metastases), which is not on this map. Not yet cited in PubMed.
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A Randomized, Controlled, Multi-center Phase II Clinical Study to Evaluate the Efficacy and Safety of Recombinant Humanized Anti-HER2 Monoclonal Antibody-MMAE Conjugate for Injection in the Treatment of HER2-positive Locally Advanced or Metastatic Breast Cancer and Phase III Clinical Study to Evaluate the Efficacy and Safety of Recombinant Humanized Anti-HER2 Monoclonal Antibody-MMAE Conjugate for Injection in the Treatment of HER2-positive Advanced Breast With Liver Metastases
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28 authors.
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Abstract
Patients with HER2-positive advanced breast cancer with liver metastases (BCLM) have poor prognosis. Study RC48-C006 is a prospective, open-label, multi-center, randomized phase 2/3 trial (ClinicalTrials.gov identifier, NCT03500380). Based on the phase 2 results, the phase 3 stage was initiated to evaluate disitamab vedotin (DV) versus lapatinib plus capecitabine (L + C) in patients with HER2-positive BCLM who were previously treated with trastuzumab and taxanes. The results from the phase 3 stage are reported in this article. A total of 104 patients were randomized at 1:1 to receive DV (53 patients) or L + C (51 patients). Progression-free survival (PFS) assessed by the blinded Independent Review Committee (BIRC) was significantly improved with DV versus with L + C (median: 9.9 vs 4.9 months; stratified hazard ratio [HR]: 0.56 [95.48% CI, 0.35-0.91]; 2-sided P = 0.01), meeting the pre-specified primary endpoint. The investigator-assessed PFS was consistent with the BIRC assessment. Prespecified subgroup analysis of PFS consistently favored DV. Similar incidences of grade ≥3 treatment-related adverse events were reported with DV versus L + C (37.7% vs 36.0%). The present findings support DV as a treatment option for HER2-positive BCLM following trastuzumab and taxane therapy.
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