Hyundai ADM Bio announced the voluntary withdrawal of its Investigational New Drug (IND) application for Phase 1 clinical trial evaluating Penetrium? in combination with docetaxel, as part of a strategic redirection to focus on immunotherapy-based combinations. The company plans to resubmit an IND application within this month for a new trial combining its ECM-targeting agent, Penetrium?, with immune checkpoint inhibitors.
This decision reflects not merely the termination of a single trial, but a forward-looking repositioning aligned with the structural transformation of the global oncology landscape and a refined scientific understanding of tumor microenvironment dynamics. Merck's immune checkpoint inhibitor Keytruda® has been investigated in over 1,600 combination trials worldwide. With key patents scheduled to expire starting in 2028, major biopharmaceutical companies such as Celltrion and Samsung Bioepis are accelerating efforts to secure biosimilar pipelines and manufacturing infrastructure.
At the American Association for Cancer Research (AACR) Annual Meeting 2025, key themes that emerged across presentations and investor discussions included the expanded access to immunotherapy, diversification of combination approaches, and competitive advancement of next-generation oncology pipelines. Despite the ongoing democratization of immunotherapy, one of the most persistent clinical challenges remains the extracellular matrix (ECM) barrier in tumors--particularly in so-called "cold tumors." When surrounded by stiff, fibrotic ECM, tumors can effectively block the infiltration of T cells and antibody-based therapies, rendering immune checkpoint inhibitors ineffective. Hyundai ADM has termed this phenomenon as "pseudo-resistance" and has positioned ECM reprogramming as the core of its oncology strategy to overcome this structural and immunological blockade.
Penetrium??, a novel ECM-modifying therapeutic developed by Hyundai ADM, works by softening fibrotic tumor matrices, thereby enabling deeper penetration of immune cells and therapeutic antibodies. Preclinical data announced at AACR 2025 demonstrated that in triple-negative breast cancer (TNBC) in vivo models, the combination of Penetrium? and anti-PD-1 therapy reduced tumor volume by 48.3% compared to monotherapy.
Moreover, while lung metastases were observed in monotherapy groups, no such metastases were detected in the combination treatment group. Industry observers have described Penetrium? as the most clinically advanced ECM-based immunotherapy combination candidate to date, with the potential to serve as a backbone in post-patent immuno-oncology strategies.
