This was consistent with a previous report of OATP1A2 and OATP2B1 expression on CD31+ GBM vasculature.21 In contrast, OATP expression within the vasculature of non-tumor tissue was scarce, with only weak detection of OATP2B1 and 4A1. The gene discussed is SLCO1A2; the disease is glioblastoma.