Posted by Chantel Martiromo. research contributed by PubMed
Phytoestrogens have a controversial effect on hormone-dependent tumours. In the study to investigate the effect of the pumpkin seed extract (PSE) on estradiol
production and estrogen receptor (ER)-α/ER-β/progesterone receptor (PR)
status on MCF7, Jeg3, and BeWo cells conducted by the University of Rostock, posted in PubMed, indicated that the PSE was prepared and analyzed by mass spectrometry. MCF7, Jeg3, and
BeWo cells were incubated with various concentrations of PSE. Untreated
cells served as controls. Supernatants were tested for estradiol
production with an ELISA method. Furthermore, the effect of the PSE on
ER-α/ER-β/PR expression was assessed by immunocytochemistry. The PSE was
found to contain both lignans and flavones. Estradiol production was
elevated in MCF7, BeWo, and Jeg3 cells in a concentration-dependent
manner. In MCF7 cells, a significant ER-α downregulation and a
significant PR upregulation were observed. The above results after
properly designed animal studies could highlight a potential role of
pumpkin seed's lignans in breast cancer prevention and/or treatment.
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