the human malignant astrocytoma cells in the host brain were immunocytochemically double-labeled for the presence of phal , which is used as a marker for graft derived cells , and either glial fibrillary acidic protein ( gfap ) , a specific marker for astrocytes and astrocytoma cells , or apolipoprotein e ( apoe ) 7 days , 14 days , 21 days , and 1 month later .
C0004112
astrocytes
C0004114
astrocytoma