Noteworthy, when we compared the tyrosine kinase receptors AXL and MERTK in U87MG cells vs. MDM, AXL was highly expressed only in glioma cells, whilst MERTK was expressed in MDM (Figure 5d,e) which denote the difference in the cell type source during heterotypic co-culture. Here, NTRK1 is linked to glioma.