BECN1 and esophageal squamous cell carcinoma: To investigate the effects of P. gingivalis infection and Beclin1 downregulation on the proliferation, migration and antiapoptosis of ESCC cells (KYSE-150 and KYSE-30) in vitro, we infected ESCC cells with P. gingivalis for 24 h and compared them with ESCC cells transfected with Beclin1 siRNA.