Objective: To observe and evaluate the phytoestrogenic effects and its mechanism of psoralen in estrogen receptor (ER) alpha and beta positive T47D and ishikawa cells.
Method: The proliferation rate of T47D influenced by 1 x 10(-5) mol x L(-1) to 1 x 10(-9) mol x L(-1) psoralen and that of Ishikawa influenced by 1 x 10(-6) mol x L(-1) and 1 x 10(-7) mol x L(-1) psoralen were analyzed by MTT assay. PR mRNA expression in T47D was quantified by RT-PCR assay. Estrogen receptor antagonist ICI 182, 780 was employed as a tool. ER-alpha and ER-beta expression of T47D was measured by flow cytometry.
Result: The proliferation rates of T47D cells treated with 1 x 10(-5) mol x L(-1) to 1 x 10(-7) mol x L(-1) psoralen and ishikawa cells treated with 1 x 10(-6) mol x L(-1) to 1 x 10(-7) mol x L(-1) psoralen were increased significantly. The RT-PCR result showed that 1 x 10(-7) mol x L(-1) and 1 x 10(-6) mol x L(-1) psoralen could increase PR expression in T47D cells. The above effects could be blocked by ICI 182,780. Psoralen could also induce the augment of ER-alpha and ER-beta expression in T47D cells significantly.
Conclusion: Psoralen has phytoestrogenic effects. The effects are attained through ER pathway.
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