LGALS1 and glioblastoma: Vero cells, human umbilical endothelial cells (HUVECs), and microvascular endothelial cells (mVECs) all showed a 90% reduction in cell-cell fusion, and U87 glioblastoma cells showed a 60% reduction in fusion, compared to control cultures, in the presence of galectin-1 (Fig. 1A).