Seagen's Tucatinib/Trastuzumab Combo Shows Encouraging Antitumor Activity In Pretreated Colorectal Cancer Patients

  • Seagen Inc SGEN announced full results from the phase 2 MOUNTAINEER trial, which showed Tukysa (tucatinib) combined with trastuzumab was well-tolerated with durable responses in patients with previously treated HER2-positive metastatic colorectal cancer (mCRC). 
  • Topline results were announced in May.
  • At a median duration of follow-up of 20.7 months, the data showed a 38.1% confirmed objective response rate (cORR) in Tukysa plus trastuzumab combo regime. 
  • The median duration of response (DoR) in these patients was 12.4 months. Median progression-free survival was 8.2 months, and median overall survival was 24.1 months. 
  • Read Next: This Analyst Believes Seagen Is Evaluating Strategic Alternatives.
  • In a cohort of patients who received tucatinib monotherapy (n=30), the ORR by 12 weeks was 3.3%, and the disease control rate was 80.0%. 
  • The most common treatment-emergent adverse events (AEs) in patients who received tucatinib and trastuzumab were diarrhea, fatigue, nausea, and infusion-related reaction. The most common Grade ≥3 AE was hypertension.
  • Price Action: SGEN shares closed at $180.11 on Friday.

Posted In: BiotechNewsHealth CareGeneralBriefscolorectal cancerPhase 2 Trial