Psoralen is a naturally occurring furocoumarin that intercalates with DNA, inhibiting DNA synthesis and cell division.
Psoralen inhibits the proliferation of MCF-7/ADR cells as shown by G0/G1 phase arrest rather than encouraging apoptosis. Psoralen reverses MDR(multidrug resistance) through inhibiting ATPase activity rather than reducing P-gp expression. Psoralen inhibits the migration abilities of MCF-7/ADR cells by repressing EMT possibly through inhibiting the activation of NF-B. Psoralens are photoactive compounds that readily alkylate DNA when activated by longwave ultraviolet light. Proliferation has been significantly promoted in MCF-7/ADR cells treated with low concentration of psoralen (<10.75 M) and inhibited with high concentration(>21.5 M). Psoralen can inhibit metastasis of breast cancer. Psoralen mediates a variety of cell processes including cell death, proliferation, inflammation and migration.