Not sure the full MOA, but this monoclonal antibody appears to be more limited in its MOA, and potentially not nearly as broad acting as Leronlimab. Leronlimab is like attacking the tree at the trunk, whereas lenzilumab Is
“A recombinant monoclonal antibody against the cytokine granulocyte macrophage colony-stimulating factor (GM-CSF), with potential immunomodulating activity. Upon administration, lenzilumab binds to and neutralizes GM-CSF. This prevents GM-CSF binding to the GM-CSF receptor, which is a heterodimeric protein expressed on myeloid progenitor cells, and prevents GM-CSF-mediated signaling. This may induce apoptosis in and inhibit proliferation of cancer cells that overproduce GM-CSF. GM-CSF plays a key role in the differentiation and proliferation of monocytes, macrophages and granulocytes; elevated levels of GM-CSF are associated with certain autoimmune diseases, inflammatory diseases, and cancers.”
That doesn’t mean that it may not have good cancer applications. It just seems to be way more limited than Leronlimab, particularly in taking the cytokine storm.
Just my opinion.