BioAtla Presents Promising Interim Data from its Phase 1 Trial with BA3182 in Patients with Treatment Refractory Metastatic Adenocarcinoma at ESMO 2025

Core Insights - BioAtla, Inc. announced preliminary clinical data from a Phase 1 study of BA3182, a bispecific T-cell engager targeting EpCAM and CD3, at the ESMO Congress 2025, highlighting its potential for treating treatment-refractory metastatic adenocarcinoma [1][3] Group 1: Clinical Data and Efficacy - BA3182 shows a manageable safety profile with preliminary evidence of antitumor activity [4] - Prolonged tumor control observed with increasing doses of BA3182, including a confirmed partial response at 0.6 mg in a patient with intrahepatic cholangiocarcinoma without progression for over 6 months [6] - Among patients treated at doses of 0.6 mg and higher, there was a higher rate of stable disease and prolonged treatment intervals compared to those receiving lower doses [13] Group 2: Safety Profile - Adverse events were generally transient and manageable, with only 2 cases of cytokine release syndrome reported [6] - No treatment-related deaths occurred, and only one patient discontinued treatment due to an adverse event [6] - Safety profile supports continued dose escalation, with the maximally tolerated dose not yet defined [6] Group 3: Technology and Mechanism - BA3182 is designed to selectively bind within the acidic tumor microenvironment, reducing on-target, off-tumor toxicity associated with traditional antibodies [2][9] - The CAB technology utilized by BioAtla activates only in diseased microenvironments, aiming for more selective targeting and lower toxicity compared to conventional therapies [10] Group 4: Market Potential - BA3182 has the potential to serve over one million patients globally, indicating a significant market opportunity for BioAtla [3]