Curr Pharm Biotechnol. 2021 ;22(12):1612-1627. PMID: 33535947
Role of Amygdalin in Blocking DNA Replication in Breast Cancer In Vitro.
BACKGROUND: Amygdalin has anticancer benefits because of its active component, hydrocyanic acid. However, the underlying molecular mechanism is unclear.OBJECTIVE: This study aimed to investigate the molecular mechanism by which amygdalin exerts antiproliferative effects in the human Michigan Cancer Foundation-7 (MCF-7) breast cancer cell line.METHODS: MCF-7 cells were exposed to amygdalin at a particular ICvalue for 24 and 48 hours and compared to non-treated cells. An Affymetrix whole-transcript expression array was used to analyze the expression of 32 genes related to DNA replication.RESULTS: Among the 32 genes, amygdalin downregulated the expression of 16 genes and 19 genes by>1.5-fold at 24 and 48 hours, respectively. At 24 hours, the downregulated genes from the DNA polymeraseα-primase complex were POLA1, POLA2, PRIM1, and PRIM2; DNA polymerase δ complex: POLD3; DNA polymerase ε complex: POLE4, Minichromosome Maintenance protein (MCM) complex (helicase): MCM2, MCM3, MCM4, MCM6, and MCM7; clamp and clamp loader: PCNA; nuclease: FEN1; and DNA ligase: LIG1. At 48 hours,the downregulated genes from the DNA polymerase α-primase complex were POLA1, POLA2, and PRIM1; DNA polymerase δ complex: POLD3; DNA polymerase ε complex: POLE and POLE2; MCM complex (helicase): MCM2, MCM3, MCM4, MCM5, MCM6, and MCM7; clamp and clamp loader: PCNA, RFC2, and RFC3; RNase H: RNASEH2A; nucleases: DNA2 and FEN1; and DNA ligase: LIG1.CONCLUSION: Amygdalin treatment caused downregulation of several genes that play critical roles in DNA replication in the MCF-7 cell line. Thus, it might be useful as an anticancer agent.