MMP3 and neoplasm: These tumor suppressors inhibit cell proliferation by targeting matrix metallopeptidase 3 (Zheng et al. 2019), inhibit metastasis (Tong et al. 2018; Li et al. 2020; Shi et al. 2020; Yao et al. 2018), and induce apoptosis (Tong et al. 2018).