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Long Noncoding RNA CAT104 Promotes Cell Viability, Migration, and Invasion in Gastric Carcinoma Cells Through Activation of MicroRNA-381-Inhibiting Zinc Finger E-box-Binding Homeobox 1 (ZEB1) Expression.

Gastric carcinoma (GC) remains the second leading cause of cancer-related deaths worldwide. Good biomarkers are of paramount importance for GC therapy. This study aimed to assess the role of long noncoding RNA (lncRNA) CAT104 in GC. We found that CAT104 was highly expressed in human GC NCI-N87, SGC7901, BGC823, BGC803, and AGS cells. Suppression of CAT104 decreased NCI-N87 cell viability, migration, and invasion, but promoted apoptosis. CAT104 knockdown enhanced the expression of microRNA-381 (miR-381) expression in NCI-N87 cells. miR-381 participated in the regulatory effects of CAT104 on NCI-N87 cell viability, migration, invasion, and apoptosis. Zinc finger E-box-binding homeobox 1 (ZEB1) was identified as a direct target of miR-381. Overexpression of ZEB1 reversed the miR-381 mimic-induced cell viability, migration, and invasion inhibition. Suppression of ZEB1 reversed the miR-381 inhibitor-induced activation of the c-Jun N-terminal kinase (JNK) pathway and Wnt/β-catenin signaling pathways in NCI-N87 cells. In conclusion, CAT104 might function as an oncogenic factor in GC cells via regulating the expression of miR-381 and ZEB1.