| ABP | Average branch points |
| aCSF | Artificial cerebrospinal fluid |
| AKD | Apelin knock-down |
| APLNKO | Apelin knock-out |
| APLNWT | Apelin wildtype |
| APLN | Apelin |
| APLNR | Apelin Receptor |
| dpi | days post implantation |
| GBM | Glioblastoma |
| GFP | Green fluorescent protein |
| NSC | Non-silencing control |
| VEGFA | Vascular endothelial growth factor-A |
| VLD | Vessel length density |
| VWF | von Willebrand factor |
| WT | Wild-type |