PIEZO1 and glioblastoma: The S1391 site of PIEZO1 exhibits a higher level of phosphorylation in KIRC (p = 0.012), HNSC (p < 0.0001) and PAAD (p < 0.0001), and a lower protein phosphorylation level in GBM (p = 0.011), LIHC (p < 0.0001) and LUAD (p < 0.0001) compared with normal tissues, followed by a higher protein phosphorylation level of the S1646 site for KIRC (p = 0.0002), GBM (p = 0.016), HNSC (p < 0.0001), and PAAD (p < 0.0001).