DOCK1 and oral cavity squamous cell carcinoma: In addition, Wang et al. (2018a), Wang et al. (2018b) and Wang et al. (2018c) found that circ-DOCK1 is distinctly upregulated in oral squamous cell carcinoma (OSCC) cell lines and OSCC tissues, and that circ-DOCK1 downregulation can induce apoptosis in OSCC cell lines.