CCNE1 and gastric cancer: Furthermore, Platycodon grandiflorus polysaccharide has been shown to inhibit the growth and proliferation of GC cells by promoting the degradation of proto‐oncogene protein (c‐Myc), leading to the inactivation of the p21/CDK2‐Cyclin E pathway, and significantly decreasing the activity of NUGC3 and NZ521 GC cells, which can in turn inhibit the growth and proliferation of GC cells [126].