PTPN1 and cervical cancer: In addition, Sangwan et al. 42pointed out that loss of PTPN1 and T cell phosphatase (TCPTP) could mediate the phosphorylated activation of c‐Met in mouse model and human cervical cancer cells Hela, and then promote the metastasis of tumor cells, and confirmed the interaction between PTPN1 and c‐Met in vitro.