Quantitative analyses of the Human Protein Atlas transcriptomic database (https://www.proteinatlas.org; accessed on 12 August 2022) showed transcript levels are enriched for AQP1 and specific classes of ion channels in glioblastoma biopsy samples (n = 153), with ‘enrichment’ defined as transcript levels at least fourfold higher than those in other tissues (fragments per kilobase of transcript per million fragments mapped) [23]. Here, AQP1 is linked to glioblastoma.