Kairos Pharma Announces Strategic Collaboration with Bayer to Enhance XOFIGO Activity in Metastatic Prostate Cancer
Combination Targets a $570M–$1.3B Addressable Global Market; ENV-105 Phase 2 Data Show 86% Clinical Benefit Rate in Resistant mCRPC
Kairos Pharma, Ltd. (NYSE American: KAPA), a clinical-stage biopharmaceutical company focused on overcoming cancer drug resistance, today announced a strategic collaboration with Bayer to evaluate Kairos Pharma’s lead antibody ENV-105 (carotuximab), a first-in-class CD105/BMP signaling inhibitor, in combination with Bayer’s XOFIGO (radium-223 dichloride) in metastatic castration-resistant prostate cancer (mCRPC) involving bone.
Kairos Pharma’s current programs with ENV-105 include a Phase 1 trial in EGFR-driven non-small cell lung cancer and a Phase 2 trial for castrate resistant prostate cancer. Last year, Kairos announced positive interim efficacy data from the Phase 2 trial showcasing median progression-free survival was more than 13 months, a significant improvement from standard of care. These data were presented at the 2025 ESMO Congress in Berlin. XOFIGO is the first and only FDA-approved alpha-emitting radiopharmaceutical for mCRPC with symptomatic bone metastases and is currently advancing through additional combination studies, including the Phase III PEACE-3 trial, which demonstrated a 24% reduction in mortality risk when combined with enzalutamide (HR 0.76; p=0.009).
