On July 22, 2025 Sutro Biopharma, Inc. (Sutro or the Company) (NASDAQ: STRO), an oncology company pioneering site-specific and novel-format antibody drug conjugates (ADCs), reported that it has entered into a collaboration with the U.S. Food and Drug Administration (FDA) to develop reference materials to improve regulatory standards and enhance analytical methods for ADC drug development (Press release, Sutro Biopharma, JUL 22, 2025, View Source;utm_medium=rss&utm_campaign=sutro-biopharma-announces-research-collaboration-with-the-fda-to-advance-regulatory-standards-for-antibody-drug-conjugates [SID1234654471]). The collaboration will leverage Sutro’s cell-free XpressCF technology to precisely engineer ADCs with predefined attributes, as well as FDA’s cutting-edge analytical capabilities to fully characterize these materials.
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"ADCs represent one of the most promising and fast-growing modalities for new biopharmaceuticals. We’re honored to be among a select group collaborating with the FDA to help shape regulatory standards for ADC development and quality control," said Hans-Peter Gerber, Ph.D., Sutro’s Chief Scientific Officer. "This collaboration underscores the precision and flexibility of our cell-free XpressCF platform in advancing next-generation ADCs, and we look forward to the impact of this work across the industry, with regulators, and for the patient community. We thank the FDA for the opportunity to help define the future of ADC innovation."
As part of the collaboration, Sutro and the Office of Pharmaceutical Quality (OPQ) within the FDA Center for Drug Evaluation and Research (CDER) will jointly lead the study design and selection of target antigens, payload-linkers, and drug conjugation sites representative of both approved ADCs and those in development. The results will be published upon completion, and the insights gained from this collaboration are expected to enhance OPQ’s ongoing research efforts aimed at bolstering the FDA’s capacity for the analytical characterization of ADCs to enhance ADC quality assessments.