PTBP1 and glioblastoma: PTBP1 promotes annexin A7 (ANXA7) exon 6 inclusion, producing ANXA7-I2 isoform, which inhibits the degradation of receptor tyrosine kinase (RTK) epidermal growth factor receptor (EGFR) caused by endocytosis-dependent pathway degradation188 and leads to sustained activation of the EGFR signaling pathway.189,190 EGFR, PDGFRA, and MET proto-oncogene are observed in GBM cells with ANXA7-I2 highly expressed.191 It suggests that PTBP1 promotes the RTK signaling pathway sustained activation by regulating ANXA7 AS, inducing GBM angiogenesis, cell proliferation, and migration.