Leronlimab, or PRO-140, is a human monoclonal antibody developed by CytoDyn. It was first described in the literature in 2001. This antibody binds to CCR5, which may be useful in treating HIV, cancers, and severely ill COVID-19 patients.
Leronlimab is currently being investigated for the treatment of a number of cancers and HIV.
Recently leronlimab has begun a phase II clinical trial in severely ill COVID-19 patients. Preliminary data shows a reduction in the 'cytokine storm', particularly IL-6, as well as a normalization of the CD4/CD8 T-cell ratio. These results may mitigate immune mediate injury seen in severely ill COVID-19 patients.
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