INHBB and gastric cancer: In order to explore the effect of INHBB on the progression of GC, we first detected the expression of INHBB in GC cell lines by qRT-PCR and Western blot, and selected HGC-27, MGC-803 and MKN-45 for loss-or-gain-of-function studies according to the level of endogenous INHBB expression (Fig. 2A, S2A).