ArticleFrontiers in immunology2025
A novel fully human anti-ROR1 antibody PBA-0405 optimized for ADCC, induces potent anti-tumor activity against both solid and hematological malignancies.
Article in Frontiers in immunology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- The multifaceted roles of receptor tyrosine pseudokinases in cellular signalling.Biochemical Society transactions · 2026Review
- A fully human afucosylated anti-GARP antibody PBA-0111 drives anti-tumor immunity through combined ADCC induction and TGF-β1 pathway blockade.Frontiers in immunology · 2026Article
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25 authors.
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Abstract
Introduction: B-cell malignancies, including chronic lymphocytic leukemia (CLL), pose a significant clinical challenge due to high relapse rates and dose-limiting toxicities seen with current therapies, particularly in elderly patients. Receptor tyrosine kinase-like orphan receptor 1 (ROR1) is an attractive therapeutic target due to its high expression on malignant B-cells and minimal presence in normal adult tissues, allowing the development of more potent and safer drugs for cancer treatment. PBA-0405 (called 2.0405.aF in this manuscript) is a novel, fully human afucosylated anti-ROR1 monoclonal antibody, specifically engineered for optimal induction of antibody-dependent cellular cytotoxicity (ADCC) to improve treatment of cancer. Methods: We evaluated 22.0405.aF for ADCC activity and tumor-cell killing in comparison with clinically tested anti-ROR1 antibodies, including zilovertamab and R12. Functional assessment included Results and discussion: Our findings demonstrate that 22.0405.aF exhibits far superior ADCC activity compared to anti-ROR1 antibodies, e.g. zilovertamab and R12, tested in clinical trials thus far. 22.0405.aF displayed potent tumor cell killing, both Conclusion: These results underscore the therapeutic potential of 22.0405.aF as a promising immunotherapy for treatment of ROR1-positive B-cell malignancies. Notably, 22.0405.aF has recently completed Phase 0 clinical trials in patients with head and neck carcinomas and soft tissue sarcomas, paving the way for further clinical development.
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