The GS832-PDX model formed more compact Nestin-positive tumors, the low expression of GLUT-1, indicating the relatively limited presence of blood vessels within this tumor, while the co-localization of ZO-1 expression suggested that their vascular integrity was preserved (Figure 3), coinciding with a lack of gadolinium leakage into the tumor (Figure 2). Here, TJP1 is linked to neoplasm.