Examples of genes that are strongly correlated with NTRK2 in the astrocyte-like compartment include GJA1, TTHY1, GRIK1 and KCNN3; TTHY1 and GJA1 are known to have crucial roles in tumour microtube formation and connectivity in adult high-grade gliomas37,38. Here, GJA1 is linked to neoplasm.