CPA administered on an intermittent, every 6-day metronomic schedule stimulates tumor recruitment of macrophages, natural killer (NK) cells, and dendritic cells with regression of large established tumors, as seen in several implanted glioma models; also of note, VEGF inhibition inhibited this effect.
Though not called metronomic chemotherapy, that is exactly what this was, reduced angiogenesis in chemo resistant tumors in mouse model. In fact, the higher dose intensity chemotherapy was less effective