SOX4 and cancer: SOX4 is a key transcription factor involved in occurrence and development of many cancers (Liu et al., 2018; Wang et al., 2018; Ding et al., 2019) and was shown to be related to the proliferation, migration, and invasion of GA cells and prognosis of GA patients (Fang et al., 2012; Dong et al., 2018; Shao et al., 2020).