Studies have shown that miR-15b-3p is highly expressed in exosomes secreted by gastric cancer cells and miR-15b-3p can be transferred by exosomes to enhance migration, invasion, and proliferation; it also inhibit the apoptosis of gastric cancer through the DYNLT1/caspase-3/caspase-9 signaling pathway (Wei et al., 2020). The gene discussed is CASP9; the disease is gastric cancer.