TRIM9 and glioblastoma: The functional difference between Trim9-L/TRIM9-L and Trim9-L/TRIM9-S was reported in several biological contexts including neuron morphogenesis and glioblastoma progression (Liu et al., 2018; Menon et al., 2015; Qin et al., 2016; Winkle et al., 2014), but how the two Trim9/TRIM9 isoforms are regulated remains unclear.