What Makes Leronlimab Different
Leronlimab is a unique humanized monoclonal antibody. Leronlimab prevents HIV from using the CCR5 receptor as an entry gateway for healthy cells; preclinical research has also shown that Leronlimab blocks calcium channel signaling of the CCR5 receptor when present on the cancer cell surface. Calcium channel signaling of the CCR5 receptor is a crucial component to the spread of metastatic cancer.
Due to its selectivity and target specific mechanism of action, Leronlimab allows chemokine binding (CCL3, CCL4) at therapeutic doses and does not have agonist activity of the CCR5 receptor (it does not activate the immune function of the receptor). This target specificity separates Leronlimab from other CCR5 antagonists. Other advantages of Leronlimab include improved safety profile, longer half-life, and less frequent dosing.
Why CCR5 is a Favorable Target
The CCR5 receptor has been identified as a target in HIV, GVHD, NASH, cancer metastasis, transplantation medicine, multiple sclerosis, traumatic brain injury, stroke recovery, and a variety of inflammatory conditions. As we progress in evaluating Leronlimab (PRO 140) via a pathways approach, we are encouraged by the opportunity to build a broad pipeline of indications through label expansion following initial approval for multi-drug resistant HIV.