MiR-34 family acts as an antitumor agent by participating in some important signaling pathways or regulating multiple target mRNAs and proteins [8], such as phosphatidylinositol 3-kinase–protein kinase B signaling pathway (PI3K–Akt), Notch signaling pathway, cyclin dependent kinase (Cdk), and silent mating type information regulation 2 homolog 1 (SIRT1), promoting tumor cell apoptosis, inhibiting the proliferation and differentiation of tumor cells, hindering the invasion and migration of tumor cells, and enhancing immune surveillance [9]. The gene discussed is SIRT1; the disease is neoplasm.