TGFB1 and gastric cancer: We show that ZEB1 induced by TGFβ transcriptionally inhibits SGO1-AS1 expression; in turn, SGO1-AS1 inhibits TGFβ expression by reducing TGFB mRNA stability, which mediates the reciprocal repressive loop between TGFβ/ZEB1 and SGO1-AS1 in GC.