CytoDyn Presents Novel CCR5 Inhibition Mechanisms and Long-Term Survival Signals for Leronlimab in Metastatic Breast Cancer at AACR Immuno-Oncology Conference

Core Insights - CytoDyn Inc. is advancing leronlimab, a first-in-class humanized monoclonal antibody targeting the CCR5 receptor, with potential applications in metastatic triple-negative breast cancer (mTNBC) and colorectal cancer (mCRC) [1][6] - New data presented at the AACR Immuno-Oncology Conference supports leronlimab's role in treating mTNBC, highlighting its ability to modulate immune checkpoint resistance and enhance responses to immune checkpoint inhibitors (ICIs) [2][5] Mechanistic Insights - Leronlimab targets the CCR5 receptor, which is crucial in regulating immune function and is implicated in cancer progression and immune resistance [2][6] - The study integrates patient-derived datasets with molecular and cellular analyses, suggesting that CCR5 blockade may influence T-cell exhaustion pathways and PD-L1/PD1 regulation, providing a rationale for combination therapies with ICIs [3][5] Clinical Findings - A pooled retrospective analysis of 28 heavily pretreated mTNBC patients showed a favorable safety profile for leronlimab, with no therapy-limiting toxicities and a 17.9% survival rate (5 out of 28 patients) after a median follow-up of over 63 months [6][5] - The data presented at the conference indicated that CCR5 expression correlates with elevated cytotoxic T-lymphocyte signatures and T-cell exhaustion profiles, suggesting immune states that may benefit from CCR5 inhibition [6] Future Directions - The consistency of mechanistic and clinical findings supports the continuation of leronlimab's clinical development, including further evaluation in combination immunotherapy settings [5][6] - CytoDyn is committed to improving patient quality of life through therapeutic innovation and aims to bring transformative treatments to patients worldwide [7]