Abstract:
:As many structurally diverse chemicals have been reported to function as estrogens, evaluations for estrogenicity of compounds are of widespread concern. Recently, we identified WISP-2 (Wnt-1 inducible signaling pathway protein 2) as a novel estrogen-inducible gene in human breast cancer cells. In this study, we examined whether WISP-2 could be utilized as a marker for screening environmentally relevant compounds for estrogenicity. In MCF-7 cells, progesterone, dexamethasone, tri-iodothyronine, and 2,3,7,8-tetrachlorodibenzo-p-dioxin did not regulate the expression of WISP-2, indicating that its induction is highly specific for hormones that interact with the estrogen receptor. Western blot analysis detected WISP-2 protein induced by 17-beta-estradiol (E2), not only in the cell lysates but also in the culture supernatant of exposed cells, indicating that WISP-2 was a secreted protein. The induction of WISP-2 protein by E2 in the culture supernatant was dose-dependent with estimated EC(50) levels between 10 and 100 pM. Our results demonstrated the capacity to screen environmental compounds for estrogenicity via WISP-2 induction.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Inadera H,Dong HY,Matsushima Kdoi
10.1016/S0006-291X(02)00530-2subject
Has Abstractpub_date
2002-06-14 00:00:00pages
602-8issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(02)00530-2journal_volume
294pub_type
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